Academic literature on the topic 'Fasciatus'
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Journal articles on the topic "Fasciatus"
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Obayemi, O. E., and O. O. Komolafe. "HISTOPATHOLOGY STUDIES OF SELECTED ORGANS OF Hemichromis fasciatus INHABITING IGUN GOLD MINING AND OPA RESERVOIRS, OSUN STATE, NIGERIA: A COMPARATIVE STUDY." Open Journal of Environmental Research (ISSN: 2734-2085) 1, no. 1 (March 10, 2020): 21–32. http://dx.doi.org/10.52417/ojer.v1i1.69.
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This study examined the histopathological alterations in the gills, fillet and liver of Hemichromis fasciatus in Igun reservoir (located in an abandoned goldmine area) compared to those of Opa reservoir. Life fish species were collected from Opa and Igun reservoirs and identified in the laboratory. Techniques based on histological analyses were done on the organs and photomicrographs taken using digital binocular compound LED microscope. Epithelial lifting and hypertrophy of lamellae were observed in the gills of H. fasciatus in Opa reservoir and compared to rupture of gill epithelium, rupture of chloride cell, fusion, hyperplasia, curling of lamellae in H. fasciatus of Igun reservoir. The fillet of H. fasciatusin Opa and Igun reservoirs revealed splitting and atrophy of muscle bundles. Also, parasite cyst and necrosis were observed in the fillet of H. fasciatus of Igun reservoir compared to degeneration in muscle bundles in the fish of Opa reservoir. Similarly, the liver of H. fasciatus in Igun and Opa reservoirs showed splitting at the wall of central vein, hepatopancreas and liver cells degeneration. Moreover, nucleus hypertrophy was also identified in the liver of H. fasciatus in Opa reservoir compared to vascular congestion in the central vein, bile duct, portal vein and portal artery of H. fasciatus in Igun reservoir. The study therefore concluded that H. fasciatus specimens in Igun reservoir were histopathologically unhealthy as compared with those of Opa reservoir probably due to the high level of pollution resulting in bioaccumulation of heavy metals in Igun reservoir samples.
Obayemi, O. E | Department of Zoology, Obafemi Awolowo University, Ile-Ife, Osun State, Nigeria
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Khan, Shamsher, and Irfan Mateen. "Impact of Contaminated Water and Sediment on Fish Species of Peshawar Region, KPK, Pakistan." Journal of International Cooperation and Development 5, no. 3 (November 5, 2022): 80. http://dx.doi.org/10.36941/jicd-2022-0014.
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Rivers in the KPK Peshawar region of Pak are subjected to a variety of anthropogenic impacts, Agricultural operations, industry, and urban garbage are all examples. The purpose of The goal of this research was to find out the degree of water contamination by showing a testing that includes in situ bio-monitoring of water constituents on Geno-toxicity in local fish species. Three places in the region were tested for Geno-toxicity using the micronucleus test. At sample locations like the urban perimeter, farmland, and the fertiliser industry, it was interesting to observe if there were any differences between monitored species control and such Characidium fasciatum, Astyanax fasciatus, Astyanax altiparanae. Records showed that the species from sites one, Two, and Three had a considerably greater frequency of Micronucleus when compared to fish from site Four. The frequency of Micronucleus was substantially higher in and A. altiparanae and A. fasciatus erythrocytes at sites one and two. Micronucleus frequencies were higher at site three in C. fasciatum. Micronucleus induction in C. fasciatum was associated to Cr levels in water and sediment, whereas A. altiparanae and A. fasciatum were linked to zinc levels in water and sediment.
Received: 11 July 2022 / Accepted: 19 October 2022 / Published: 5 November 2022
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Guo, Peng, Guanghui Zhong, Qin Liu, Fei Zhu, Cao Li, Ping Wang, Rong Xiao, Ming Fang, and Xin Fu. "Phylogenetic position of Lycodon gongshan Vogel and Luo, 2011, a snake endemic to China (Reptilia: Colubridae)." Amphibia-Reptilia 36, no. 2 (2015): 165–69. http://dx.doi.org/10.1163/15685381-00002985.
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Lycodon gongshanVogel and Luo, 2011 is a newly described snake species that is endemic to southwestern China. Based on two mtDNA gene fragments and two nuclear genes, a molecular phylogeny for the genusLycodonwas reconstructed and the systematic position ofL. gongshanwas evaluated. The results revealed thatL. gongshanformed a strongly supported monophyletic clade withL. fasciatus, and (L. cavernicolus +L. butleri), although the relationships among them were unresolved. The close genetic relationship betweenL. gongshanandL. fasciatusis consistent with hypotheses based on morphological data. Additionally two specimens from Guangdong, previously identified asL. fasciatus, showed a sister relationship withL. liuchengchaoiwith low genetic difference, indicating that the two specimens were misidentified, and illustrating thatL. liuchengchaoimay have much broader distribution than previous thought.
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Rubec, Peter J., Jacquie M. McGlade, Bertin L. Trottier, and André Ferron. "Evaluation of Methods for Separation of Gulf of St. Lawrence Beaked Redfishes, Sebastes fasciatus and S. mentella: Malate Dehydrogenase Mobility Patterns Compared with Extrinsic Gasbladder Muscle Passages and Anal Fin Ray Counts." Canadian Journal of Fisheries and Aquatic Sciences 48, no. 4 (April 1, 1991): 640–60. http://dx.doi.org/10.1139/f91-082.
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Malate dehydrogenase (MDH) electrophoretic mobility patterns were used as a standard against which field methods involving anal fin ray counts (AFCs) and extrinsic gasbladder muscle (EGM) rib passage patterns were compared to separate the beaked redfish species, Sebastes fasciatus and S. mentella. The frequencies of MDH-A phenotypes were determined for 1125 beaked redfish examined from a winter survey in 1983 and 376 from a summer survey in 1984. Allele frequencies were calculated from the MDH-A phenotypic data for the winter survey. The low mobility of the A2 phenotype was characteristic of 90% of S. fasciatus sampled at depths < 320 m in winter and at depths < 250 m in summer. The high-mobility A1 and heterozygotic A1/A2 phenotypes were prevalent in 95% of S. mentella sampled below these depths. The mobility patterns agreed with predominant AFCs ([Formula: see text] for S. fasciatu[Formula: see text] for S. mentella) for all stations in the deep and shallow zones. The MDH mobility patterns showed 93% agreement with EGM patterns for S. fasciatus but only 53% agreement for S. mentella. An overlap of AFCs, of main EGM patterns, and of tendon to vertebrae attachments and the variation from set to set in A1/A2 heterozygotic phenotypes suggest that these species hybridize in the Gulf of St. Lawrence.
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Manning, Richard W., and J. Knox Jones. "Perognathus fasciatus." Mammalian Species, no. 303 (January 15, 1988): 1. http://dx.doi.org/10.2307/3504144.
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Lu, Kexiang, Weiguo Qian, Kai Zhu, and Kaida Xu. "Heavy Metal Concentrations in Wild and Cultured Oplegnathus fasciatus from the East China Sea and Associated Health Risks." Water 16, no. 14 (July 11, 2024): 1957. http://dx.doi.org/10.3390/w16141957.
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In this study, a comparison of the concentrations of eight heavy metals (including Fe, Mn, Cu, Zn, Cr, As, Cd, and Hg) was conducted between wild and cultured Oplegnathus fasciatus. Significant differences in the concentrations of Zn, Cd, As, and Hg were observed between wild and cultured Oplegnathus fasciatus. The results showed that the mean Zn concentration was significantly higher in cultured Oplegnathus fasciatus (3.051 ± 0.738 mg/kg) when compared to its wild counterpart (2.512 ± 0.407 mg/kg). In contrast, the mean Cd concentration was found to be lower in the cultured Oplegnathus fasciatus (0.001 ± 0.0007 mg/kg) than in the wild ones (0.003 ± 0.003 mg/kg). Likewise, the wild samples demonstrated a higher mean As concentration (1.494 ± 0.659 mg/kg) than the cultured samples (0.594 ± 0.215 mg/kg). Lastly, it was noted that the mean Hg concentration was considerably higher in the cultured Oplegnathus fasciatus (0.042 ± 0.016 mg/kg) than in the wild specimens (0.014 ± 0.011 mg/kg). Pollution levels and health risks were evaluated using the single-factor pollution index (SFI), metal pollution index (MPI), and health risk assessment methods. The results showed that, for Cu, Zn, Cr, and Cd, both wild and cultured Oplegnathus fasciatus had SFI values below 1 compared to the marine organism quality standards. The MPI values for wild and cultured Oplegnathus fasciatus were 0.188 ± 0.051 and 0.172 ± 0.054, respectively, both far below the safety limit of 2 for pollution-free aquatic products. The Hazard Index (HI) for wild and cultured Oplegnathus fasciatus were below 1, indicating no health risks from long-term consumption. A discriminant analysis, based on Zn, Cd, As, and Hg concentrations, distinguished wild from cultured Oplegnathus fasciatus with a 96.0% accuracy, remaining stable at over 94.9% upon cross-validation. These findings accurately evaluate that there is no risk to human health from consuming Oplegnathus fasciatus, which is significant in safeguarding public health.
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Shoydokov, Alexander B., Petr V. Matafonov, and Svetlana V. Borzenko. "Geoecological functions of the Baikal endemic amphipod Gmelinoides fasciatus in the bottom subsystem of the cooling reservoir of the Chita TPP-1." Izvestiâ Russkogo geografičeskogo obŝestva 156, no. 2 (November 20, 2024): 169–78. http://dx.doi.org/10.31857/s0869607124020067.
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The geoecological situation in the natura-technical geoecosystems of Baikal Asia is complicated by the invasion of alien species. Information about the Baikal endemic amphipod Gmelinoides fasciatus that penetrated into the cooling reservoir of the Chita TPP-1 is insufficient to assess the current geoecological situation in the benthic subsystem of the cooling reservoir. The purpose of our research of the study was to identify the geoecological features and functions of Gm. fasciatus affecting the geoecological situation in the benthic subsystem of the Chita TPP-1 cooling reservoir. In 2022–2023 the Gm. fasciatus distribution, size structure of the population and elemental composition have been studied in Kenon Lake. It is established that Gm. fasciatus has settled the coastal zone of the lake, the size and structure of the population indicate its stability. The P content in the crude mass of Gm. fasciatus in the lake is 29.7 kg, Ca — 444 kg, Cu — 0.28 kg. Due to the Gm. fasciatus invasion in Kenon Lake, in the monitoring and management system of the cooling reservoir, it is now possible to use a new indicator of the state of the bottom subsystem. Invasion of the amphipod Gm. fasciatus entailed a change in the geoecological situation in the cooling reservoir of Chita TPP-1 — Kenon Lake.
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Bester, Adam J., and Karen Rusten. "Trial translocation of the numbat (Myrmecobius fasciatus) into arid Australia." Australian Mammalogy 31, no. 1 (2009): 9. http://dx.doi.org/10.1071/am08104.
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Five numbats (Myrmecobius fasciatus) were transferred into the Arid Recovery Reserve in November 2005 as part of a trial to investigate the suitability of the reserve for a full-scale reintroduction of M. fasciatus. Mean home ranges in this study were 67 ha in summer and 25 ha in autumn/winter. This is similar to home ranges of M. fasciatus at other locations. M. fasciatus used burrows despite available log habitat and were active in air temperatures of 21−30°C and soil temperatures of 21−42°C during the autumn/winter period. M. fasciatus used ‘mulga’, ‘sanddune vegetation’, ‘bullock bush’ and ‘cypress pine’ more often than ‘saltbush/bluebush’ and other available habitats. They were also found more extensively on ‘dunes’ or ‘sand plain’ landforms than on ‘swales’. Two males were still alive 18 months after release; the other three were taken by an unknown bird of prey. We suggest that another trial be undertaken with a larger sample size to determine whether females are able to wean young and whether Arid Recovery is able to sustain a viable population of M. fasciatus.
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Helgen, Kristofer M., and Timothy F. Flannery. "Taxonomy and historical distribution of the wallaby genus Lagostrophus." Australian Journal of Zoology 51, no. 3 (2003): 199. http://dx.doi.org/10.1071/zo02078.
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The banded hare-wallaby (Lagostrophus fasciatus) is an endangered macropodid currently restricted to Bernier and Dorre Islands in Shark Bay, Western Australia. Historically, L. fasciatus was also recorded on the Australian mainland from far western Australia, where it became locally extinct early in the twentieth century. Here we discuss an overlooked museum specimen of L. fasciatus collected in the mid-nineteenth century near Adelaide, South Australia. This specimen considerably extends the known historical distribution of L. fasciatus, validates anecdotal reports of the species from South Australia made by early Australian naturalists, and forms the basis for our description of a new subspecies.
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Lee, Bao-Hong, Yeh-Fang Hu, Yu-Ting Chu, Yu-Sheng Wu, Wei-Hsuan Hsu, and Fan-Hua Nan. "Lactic Acid Bacteria-Fermented Diet Containing Bacterial Extracellular Vesicles Inhibited Pathogenic Bacteria in Striped Beakfish (Oplegnathus fasciatus)." Fermentation 10, no. 1 (January 9, 2024): 49. http://dx.doi.org/10.3390/fermentation10010049.
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In recent years, probiotics have received considerable attention for improving the health of aquaculture organisms, such as fish and shrimp, by stimulating immune activity and increasing growth rates. Oplegnathus fasciatus is a common and economically important cultured fish species in Asia. In this study, we aimed to investigate the potential of lactic acid bacteria (LAB; Limosilactobacillus reuteri)-fermented feed to promote growth and enhance immune function in O. fasciatus. The feed contained the highest proportion of LAB after L. reuteri fermentation for 3 days in anaerobic conditions. Oplegnathus fasciatus was fed LAB-fermented feed for 30 days. The administration of LAB-fermented feed (live bacteria > 109 CFU/g) significantly increased the growth rate (weight gain = 174.8%; FCR = 4.23) and intestinal probiotic levels of O. fasciatus. After LAB-fermented feeding, the immunity index was evaluated by superoxide anion production, the phagocytic activity of leukocytes, and bactericidal and lysozyme activities in the serum of O. fasciatus. We found that LAB-fermented feed treatment potentially elevated the proportions of intestinal Bifidobacterium, Blautia, and Dorea species and reduced pathogenic bacterial growth (Acinetobacter, Escherichia_Shigella, and Megasphaera) in O. fasciatus. This study demonstrated that LAB-fermented feed containing extracellular vesicles improves growth performance and the inhibition of pathogenic Acinetobacter baumannii.
Dissertations / Theses on the topic "Fasciatus"
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Lacerda, Larissa Galvão de. "Variabilidade cromossômica estrutural em Astyanax aff. fasciatus." Universidade Estadual de Londrina, Instituto Agronômico do Paraná, EMBRAPA. Centro de Ciências Biológicas. Programa de Pós-Graduação em Genética e Biologia Molecular, 2013. http://www.bibliotecadigital.uel.br/document/?code=vtls000193545.
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O gênero Astyanax pertence ao grupo Incertae Sedis e caracteriza-se por sua extensa variabilidade citogenética tanto numérica (2n=36 a 2n=50) quanto estrutural. Astyanax fasciatus é um peixe de pequeno porte que apresenta nadadeiras vermelhas, por isso é chamado de lambari do rabo vermelho. As populações de Astyanax fasciatus variam bastante quanto ao número diplóide, com exemplares de 2n=45 até 2n=50 e também apresentam grande variabilidade estrutural intra e interpopulacional. A espécie faz parte de um complexo de espécies e, de acordo com a revisão morfológica recente deste complexo, somente os exemplares pertencentes ao Rio São Francisco podem ser considerados Astyanax fasciatus, os demais exemplares constituem outras espécies, incluindo espécies novas. Estudos anteriores realizados em 1995 na população de Astyanax aff. fasciatus do Ribeirão Três Bocas, observaram uma extensa variabilidade estrutural, sendo definidos cinco cariótipos: Cariótipo A com 26m-sm+20st-a, Cariótipo B com 27m-sm+19st-a, Cariótipo C com 28m-sm+18st-a, Cariótipo D com 30m-sm+16st-a e Cariótipo E com 34m-sm+12st-a. Este trabalho pretende comparar os resultados obtidos atualmente com os anteriores para os exemplares de Astyanax aff. fasciatus coletados no Ribeirão Três Bocas, além de caracterizar a população do Ribeirão Jacutinga, ambos ribeirões da margem esquerda da Bacia do Rio Tibagi. Todos os exemplares apresentaram 2n=46, sem distinção de cromossomos sexuais. Foram encontrados neste estudo quatro fórmulas cariotípicas, sendo: Cariótipo A 14m+12sm+20st-a, E 18m+16sm+12st-a, F 13m+18sm+15st-a e G 15m+20sm+11st-a. A população do Rib. Jacutinga apresentou somente o Cariótipo E. Os Cariótipos A e E já foram relatados na população, sendo o último o cariótipo mais frequente atualmente. O Cariótipo F (13m+18sm+15st-a) possivelmente se originou do Cariótipo D (11m+19sm+16st-a), não encontrado atualmente. O Cariótipo G (15m+20sm+11st-a) provavelmente originou-se a partir do Cariótipo E (12m+22sm+12st-a) descrito anteriormente através de três inversões pericêntricas. A técnica de Banda C definiu um padrão para cada cariótipo, evidenciando blocos pericentroméricos e blocos bem evidentes nas regiões terminais do braço longo. A técnica de Banda C corada com fluorocromos base específicos também auxiliaram na distinção entre os cariótipos, o Cariótipo A apresentou apenas blocos heterocromáticos CMA3+; o Cariótipo E apresentou dois pares com heterocromatina neutra (CMA3+ e DAPI+) e os demais blocos foram DAPI+; o Cariótipo F apresentou um par com heterocromatina neutra além de blocos DAPI +. Os dados obtidos corroboram com a existência de um complexo de espécies e essa variabilidade cromossômica indica que Astyanax aff. fasciatus apresentam uma grande plasticidade.The genus Astyanax belongs to the group Incertae Sedis and is characterized for its extensive cytogenetic variability, both numeric (2n=36 a 2n=50) and structural. Astyanax fasciatus is a small fish that has red fins, for this reason is known as lambari de rabo vermelho in Brazil. Their population vary the diploid number from 2n=45 a 2n=50 and also have a wide structural variability both intra and interpopulation. This specie belongs to a species complex and, according to the latest morphologic review, only individuals from São Francisco River are considered Astyanax fasciatus, individuals from other river basins belong to other species, including new ones. Previous studies carried on 1995 in the Astyanax aff. fasciatus population from Três Bocas Stream, Tibagi River basin, distinguished wide structural variability and defined five karyotypes: Karyotype A 26m-sm+20st-a, Karyotype B 27m-sm+19st-a, Karyotype C 28m-sm+18st-a, Karyotype D 30m-sm+16st-a and Karyotype E 34m-sm+12st-a. This study intend to compare the previous results with the ones gathered nowadays for the population of Astyanax aff. fasciatus from Três Bocas Stream, moreover characterize the population from Jacutinga Stream, both streams in the left margin of Tibagi River. All individuals had 2n=46, no morphologically differentiated sex chromosomes were identified. Four karyotypes were found: Karyotype A 14m+12sm+20st-a, E 18m+16sm+12st-a, F 13m+18sm+15st-a and G 15m+20sm+11st-a. The Jacutinga Stream population presented only Karyotype E. The Karyotypes A and E were already reported in the Três Bocas Stream population, the last one is the most frequent nowadays. Karyotype F (13m+18sm+15st-a) possibly originated from Karyotype D (11m+19sm+16st-a), which was not currently found. Karyotype G (15m+20sm+11st-a) possibly originated from previous described Karyotype E (12m+22sm+12st-a) through three pericentric inversions. Each karyotype had its particular pattern of heterochromatin distribution with perincentromeric blocks and evident blocks at the ends of the long arm of the chromosomes. The C-banding technique stained with base-specific fluorochromes also helped distinguish the karyotypes, Karyotype A presented only CMA3+ heterochromatic blocs; Karyotype E had two pairs with neutral (CMA3+ and DAPI+) heterochromatin and other blocs were DAPI+; Karyotype F had one pair with neutral heterochromatin and the other blocs were DAPI+. The data acquired confirms the existence of a species complex and the chromosomal variability indicates that Astyanax aff. fasciatus has grate plasticity.
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Assunção, Marcelo Henrique Correa [UNESP]. "Caracterização da reprodução de Astyanax fasciatus durante a domesticação." Universidade Estadual Paulista (UNESP), 2013. http://hdl.handle.net/11449/87781.
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000748420.pdf: 10455273 bytes, checksum: 5531ec5e20aa8e0ad2b7bd68b8dde10a (MD5)O presente estudo teve como objetivo analisar os índices reprodutivos e definir os aspectos reprodutivos da espécie Astyanax fasciatus no Córrego Rico, São Paulo, Brasil e confirmar duas hipóteses - Esta espécie possui desova do tipo parcelada neste ambiente especificamente e uma amostra da população colocada em cativeiro pode desenvolver a maturação gonadal. Foram capturados 40 exemplares da espécie, por meio de coletas mensais padronizadas realizadas no período de outubro de 2012 a janeiro de 2013 por meio de rede espera. Além disso, mais 120 exemplares de A. fasciatus foram coletados e transferidos para um tanque no Centro de Aquicultura da UNESP, Jaboticabal, SP e mantidos em cativeiro. Coletas mensais também foram realizadas no mesmo período das coletas in situ para biometria e análise histológica das gônadas. A hipótese de desova parcelada foi corroborada pela análise concomitante da variação dos índices gonadossomático, hepatossomático, fator de condição e volume gonadal além da análise histológica observando fêmeas parcialmente desovadas em mais de uma coleta. A hipótese de maturação gonadal em ambiente de cativeiro também foi corroborada por meio de análise histológica associada à análise dos índices reprodutivos. Nesse contexto, os resultados obtidos geram subsídios para estudos no tocante à biologia reprodutiva e sua aplicação na reprodução em ambiente de aquicultura
This study aim to study the reproductive biology of redtail tetra Astyanax fasciatus from a stream in Jaboticabal,SP and confirm two hypothesis - this specie have a fractional spawning in this place specifically and A. fasciatus can maturate gonads in capitivity environment. Adult males and females (n=40) were sampled monthly during the rainy season from October 2012 to January 2013 by gillnets. Besides, more 120 adult males and females were sampled and transferred to a pond in UNESP Aquaculture Center, Jaboticabal,SP. Monthly samples were realized in the same period that in situ samples for biometrics and histological analysis. The hypothesis of fractional spawning was corroborated by concurrent analysis of gonadosomatic index, hepatosomatic index, condition factor and gonadal volume in addition to histological analysis watching females partially spawned in more than one sample. The hypothesis of gonadal maturation in captivity environment also be corroborated by histological analysis in addition to reproductive indexes analyslis. In this context, the results generate data for studies regarding the reproductive biology and its application in breeding aquacultural environment
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Newcombe, Devi Isadora Ramayanti. "Maternal effects in the large milkweed bug Oncopeltus fasciatus." Thesis, University of Exeter, 2013. http://hdl.handle.net/10871/11343.
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Maternal effects are the non-genetic contributions of mothers (or fathers) towards the phenotype of their offspring. Maternal effects are now well recognised as a facilitator for evolutionary change in offspring phenotypes and life history strategies which can have effects on population dynamics, population divergence and even speciation. Furthermore, maternal effects have been shown to have a heritable genetic basis and that they are genetically variable, which suggests that they contribute to maintaining phenotypic variation. Maternal effects may impede or accelerate responses to selection which has implications for adaptive evolution and making predictions about their evolutionary potential. The importance of their contribution to phenotypic variation and life history evolution has made maternal effects an important consideration in fields such as conservation and population biology, evolutionary ecology and evolutionary genetics. The aim of this thesis is to investigate if maternal effects can influence offspring life history traits and fitness parameters through maternal resources via the egg. Main questions that are asked include: can maternal effects help facilitate transition to a novel host-diet (Chapter 2); does maternal diet influence egg composition and, if so, does this have an effect on offspring life-history parameters (Chapter 3); is there a genetic basis to egg composition and is there potential for egg composition to evolve (Chapter 4); and are defensive compounds from the diet transferred into the eggs, if so, are these uni- or biparentally transferred and does this offer protection against predation (Chapter 5)? To address these questions we used a specialist insect herbivore, the large milkweed bug Oncopeltus fasciatus (Hemiptera: Lygaeidae). In the wild, O. fasciatus feed on plants from the genus Asclepias (Apocynacea). However, O. fasciatus can be reared successfully in laboratories on sunflower seeds Helianthus annus. For our experiments we used two populations of O. fasciatus, one population has been maintained on dry seeds of A. syriaca while the other population has been reared and maintained on sunflower seeds. The results of Chapter 2 were suggestive of a maternal host-diet effect on egg mass and hatching success, but we did not find evidence that maternal host-diet was significant in influencing a transition to a novel host. In Chapter 3 we found that there was variation in the free amino acid profiles of the eggs between our treatments suggesting that amino acid profiles may be influenced by maternal diet. The results of our multivariate selection analysis to examine linear and nonlinear (quadratic) relationships between maternal diet and the free amino acid profiles of the eggs suggest that there may be population-specific responses which can influence specific amino acid profiles in relation to hatchling mass. In Chapter 4 we used only the milkweed-adapted population to determine if there was a genetic basis to amino acid profiles in the eggs. We constructed a genetic variance-covariance (G) matrix to determine the strength and direction of the relationships between amino acids and to assess the potential for amino acid profiles to evolve. While we found genetic variation for amino acids, and that there was evidence for positive moderate to strong genetic correlations between many of them, we also found evidence for constraints for the potential for amino acid profiles to evolve as evidenced by the calculation of gmax (which represents the linear combination of components that has the highest genetic variance and which is the most accessible to evolution). In Chapter 5 we found maternal, but not paternal, transmission of cardenolides into the eggs. However, this did not confer protection of all eggs against predation from larvae of the green lacewing Chrysoperla carnea. Overall, results suggest that for our populations of O. fasciatus, maternal effects are significant in influencing early life history traits such as egg mass and hatchling mass. However, we did not find any significant effects on other offspring life history or fitness parameters that we measured. This may be surprising as positive, and negative, effects of non-genetic contributions of females (and males) to their offspring has been widely reported in many taxa. The patterns and implications of maternal resource allocation and their effects on offspring life history evolution are explored and discussed, as are the limitations of our experimental designs. I hope that this research can be used to stimulate further investigations into maternal effects and the relationships between host-plant, maternal allocation strategies and life history evolution.
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Assunção, Marcelo Henrique Correa. "Caracterização da reprodução de Astyanax fasciatus durante a domesticação /." Jaboticabal, 2013. http://hdl.handle.net/11449/87781.
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Orientadora: Laura Satiko Okada NakaghiBanca: Erico Luis Hoshiba Takahashi
Banca: George Shigueki Yasui
Resumo: O presente estudo teve como objetivo analisar os índices reprodutivos e definir os aspectos reprodutivos da espécie Astyanax fasciatus no Córrego Rico, São Paulo, Brasil e confirmar duas hipóteses - Esta espécie possui desova do tipo parcelada neste ambiente especificamente e uma amostra da população colocada em cativeiro pode desenvolver a maturação gonadal. Foram capturados 40 exemplares da espécie, por meio de coletas mensais padronizadas realizadas no período de outubro de 2012 a janeiro de 2013 por meio de rede espera. Além disso, mais 120 exemplares de A. fasciatus foram coletados e transferidos para um tanque no Centro de Aquicultura da UNESP, Jaboticabal, SP e mantidos em cativeiro. Coletas mensais também foram realizadas no mesmo período das coletas in situ para biometria e análise histológica das gônadas. A hipótese de desova parcelada foi corroborada pela análise concomitante da variação dos índices gonadossomático, hepatossomático, fator de condição e volume gonadal além da análise histológica observando fêmeas parcialmente desovadas em mais de uma coleta. A hipótese de maturação gonadal em ambiente de cativeiro também foi corroborada por meio de análise histológica associada à análise dos índices reprodutivos. Nesse contexto, os resultados obtidos geram subsídios para estudos no tocante à biologia reprodutiva e sua aplicação na reprodução em ambiente de aquicultura
Abstract: This study aim to study the reproductive biology of redtail tetra Astyanax fasciatus from a stream in Jaboticabal,SP and confirm two hypothesis - this specie have a fractional spawning in this place specifically and A. fasciatus can maturate gonads in capitivity environment. Adult males and females (n=40) were sampled monthly during the rainy season from October 2012 to January 2013 by gillnets. Besides, more 120 adult males and females were sampled and transferred to a pond in UNESP Aquaculture Center, Jaboticabal,SP. Monthly samples were realized in the same period that in situ samples for biometrics and histological analysis. The hypothesis of fractional spawning was corroborated by concurrent analysis of gonadosomatic index, hepatosomatic index, condition factor and gonadal volume in addition to histological analysis watching females partially spawned in more than one sample. The hypothesis of gonadal maturation in captivity environment also be corroborated by histological analysis in addition to reproductive indexes analyslis. In this context, the results generate data for studies regarding the reproductive biology and its application in breeding aquacultural environment
Mestre
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Campbell, Gerard L. "Behaviour of the epidermal cell in an insect, Oncopeltus fasciatus." Thesis, University of Leicester, 1987. http://hdl.handle.net/2381/34295.
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The behaviour of the epidermal cell of the insect, Oncopeltus fasciatusy has been studied in the dorsal abdomen in three situations: during the moult cycle, wound healing and pattern regulation. This behaviour can be classified into seven categories: activation, division, movement, alteration in shape, death, differentiation and cuticle secretion. Data are presented on the first five categories. Aspects of cell behaviour studied during the intermoult period of the moult cycle consist mainly of activation and division. The exact stimuli for this behaviour have not been determined, although an increase in ecdysteroid titre may not be sufficient. The first mitotic figures in the moult cycle are concentrated behind the anterior border of the segment, but later the mitotic index is uniform over most of the segment. Cell behaviour induced after wounding consists largely of activation, division and movement. Degradation products from damaged epidermal cells are not solely responsible for this activation and the strongest influence appears to be the presence of an incision. Activated cells peripheral to wounds will not divide unless ecdysterone is present. Cells may divide beneath wounds and the condition required for this is probably the disruption of epidermal continuity for a minimum length of time. Cell behaviour after the confrontation of cells from different anteroposterior levels in the segment consists mainly of division and transverse elongation at the confrontation site. The intensity of this behaviour is explained by a difference in positional values between confronted cells so that there is a non-linear gradient of positional values along the segment with a discontinuity at the segment border. If this discontinuity is maintained by a special population of cells at the border, then the regeneration of segment borders can be explained by the formation of these special cells following the confrontation of cells with almost the maximum difference in positional values.
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Pazza, Rubens. "Contribuição citogenética à análise da biodiversidade em Astyanax fasciatus (Pisces, Characidae)." Universidade Federal de São Carlos, 2005. https://repositorio.ufscar.br/handle/ufscar/5426.
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Previous issue date: 2005-03-10Universidade Federal de Sao Carlos
Astyanax fasciatus is characterized as a cytogenetically diverse species. Sympatric and syntopic occurrence of distinct cytotypes corroborates the hypothesis that A. fasciatus might represent a species complex sharing a common denomination. In this work, specimens from three collection sites along Mogi-Guaçu River, on Southeastern Brazil, were examined: (1) close to headwaters (Ouro Fino MG), (2) in the mean river portion (Cachoeira de Emas, Pirassununga SP, characterized by the presence of a dam) and (3) close to river mouth at Pardo river (Barrinha SP). Two karyotypes bearing perfectly paired chromosomes, named standard cytotypes, were identified; one of them with 2n=46 and another one with 2n=48 chromosomes. The cytotype 2n = 48 was found in all collection sites, whereas the cytotype 2n = 46 was restricted to Barrinha and Cachoeira de Emas. In this latter locality, the cytotype 2n=46 was predominant, but variant karyotypical forms were also reported, bearing 2n=45 and 47 chromosomes, besides a structural variant with 2n=46. A variant with 2n=47 chromosomes was also found in Ouro Fino. The Ag-NORs and 18S and 5S rDNA sites showed a conserved distribution among cytotypes, as well as the constitutive heterochromatin, preferentially located at terminal region on the long arms of submetacentric, subtelocentric and acrocentric chromosomes and terminal region on short arms of a submetacentric pair. This latter region showed to be GC-rich after chromomycin A3 staining and it corresponds to the location of a Nucleolar Organizer Region. Sites bearing the satellite DNA As51 were detected at terminal region on the long arms of several chromosomes, distributed over 4 submetacentric pairs, 3 subtelocentric pairs and one acrocentric pair in the standard cytotype 2n=46, and over 3 submetacentric pairs, 4 subtelocentric pairs and one acrocentric pair in the standard cytotype 2n=48. The variant karyotypical forms also presented other chromosomes bearing such satellite DNA, remarkably at a large metacentric chromosome bearing a terminal site on the long arms (found in two variant karyotypes), two subtelocentric pairs bearing additional interstitial site (found in one variant karyotype), and one submetacentric pair bearing a subterminal site on the long arms (found in one variant karyotype). Data based on RAPD (Random Amplified Polymorphic DNA) were poorly informative to analyze the reported diversity, indicating a high number of migrants per generation among cytotypes. On the other hand, data from ISSR (Inter-Simple Sequence Repeats) showed a low structuring, mainly between two standard cytotypes from Barrinha, where a Nm value of 0,4301 was observed, with a genetic identity of 0,6862 and genetic distance of 0,3765. The values of genetic distance (0,3219) and genetic identity (0,7248) between cytotypes with 2n=48 from Barrinha and Ouro Fino also evidenced a slight differentiation, indicating that the dam at Cachoeiras de Emas is probably a barrier to gene flow among populations located upstream and downstream the dam. The obtained results with molecular markers do not discard the possibility of inbreeding among the cytotypes of A. fasciatus, as a source of the diversity found. Hypothetically, the standard cytotype with 2n=48 might be the resident form at Mogi- Guaçu River, while the cytotype with 2n=46 would represent an invasive form, showing recent divergence. Although the variant karyotypes present a karyotypical structure similar to the cytotype with 2n=46, there are evidences that chromosomes typical from the cytotype with 2n=48 have been incorporated, suggesting that such variants may be derived from viable crossings among standard cytotypes, and/or their offsprings, which share some homologies, as demonstrated by chromosomal markers. The presence of a higher number of As-51 sites in some variants reinforces their inbreeding origin. The As-51 sites, which showed to be specific for some variant forms, might be originated by complementary chromosomal rearrangements, propitious to new locations of this satellite DNA on karyotypes.
Astyanax fasciatus caracteriza-se como uma espécie diversificada do ponto de vista citogenético. A ocorrência simpátrica e sintópica de diferentes citótipos corrobora a hipótese de que A. fasciatus possa representar um grupo de espécies, hoje englobadas em uma mesma denominação comum. Neste trabalho foram examinados exemplares provenientes de três pontos de coleta, ao longo do rio Mogi-Guaçu, no Sudeste do Brasil: (1) próximo à sua cabeceira (Ouro Fino MG), (2) no trecho médio do rio (Cachoeira de Emas, Pirassununga SP, caracterizado pela ocorrência de uma barragem) e (3) próximo à sua foz no rio Pardo (Barrinha SP). Foram detectados dois tipos de cariótipos com cromossomos perfeitamente pareáveis, denominados citótipos padrão, um com 2n=46 e outro com 2n=48 cromossomos. O citótipo 2n = 48 foi encontrado em todos os pontos de coleta, enquanto o citótipo 2n = 46 foi encontrado somente em Barrinha e Cachoeira de Emas. Nesta última localidade o citótipo 2n=46 foi predominante, mas ocorrendo também formas cariotípicas variantes com 2n=45 e 47 cromossomos, além de um variante estrutural 2n=46. Um variante 2n=47 cromossomos foi também encontrado em Ouro Fino. As Ag-RONs e os sítios de rDNA 18S e 5S mostraram uma distribuição conservada entre os citótipos, assim como heterocromatina constitutiva, localizada preferencialmente na região terminal do braço longo de cromossomos submetacêntricos, subtelocêntricos e acrocêntricos e na região terminal do braço curto de um par submetacêntrico. Esta última região mostrou-se também GC rica, após coloração com cromomicina A3, e corresponde à localização de uma região organizadora de nucléolo. Foram detectados sítios do DNA satélite As51 na região terminal do braço longo de vários cromossomos, distribuídos em 4 pares submetacêntricos, em 3 pares subtelocêntricos e em um par acrocêntrico no citótipo padrão 2n=46, e em 3 pares submetacêntricos, em 4 pares subtelocêntricos e em um par acrocêntrico no citótipo padrão 2n=48. As formas cariotípicas variantes apresentaram também outros cromossomos portadores desse DNA satélite, destacando-se um cromossomo metacêntrico grande com um sítio terminal no braço longo (em dois cariótipos variantes), dois pares subtelocêntricos com um sítio intersticial extra (em um dos cariótipos variantes), e um par submetacêntrico com um sítio subterminal no braço longo (em um dos cariótipos variantes). Dados de RAPD ( Random Amplified Polymorphic DNA ) mostraram-se pouco informativos quanto à análise da diversidade encontrada, indicando altos valores de migrantes por geração entre os citótipos. Dados de ISSR, Inter- Simple Sequence Repeats , por outro lado, mostraram uma pequena estruturação, principalmente entre os dois citótipos padrão provenientes de Barrinha, onde o Nm foi de 0,4301, com identidade genética de 0,6862 e distância genética de 0,3765. Os valores de distância genética (0,3219) e de identidade genética (0,7248) entre os citótipos 2n=48 de Barrinha e Ouro Fino também evidenciam uma certa diferenciação entre os mesmos, indicando que a barragem de Cachoeira de Emas provavelmente seja um obstáculo ao livre fluxo entre populações situadas à jusante e à montante da mesma. Os resultados gerais obtidos com os marcadores moleculares não descartam a possibilidade de intercruzamentos entre os citótipos de A. fasciatus, como fonte da diversidade encontrada. É levantada a hipótese que o citótipo padrão 2n=48 seja a forma residente do rio Mogi-Guaçu, sendo o citótipo 2n=46 uma forma invasora, com divergência recente. Embora os cariótipos variantes apresentem uma estrutura cariotípica mais similar ao citótipo 2n=46, há evidências de que cromossomos característicos do citótipo 2n=48 tenham sido neles incorporados, sugerindo que tais variantes sejam decorrentes de intercruzamentos viáveis entre os dois citótipos padrão e/ou seus descendentes, os quais ainda compartilham uma série de homologia, como evidenciado na análise dos marcadores cromossômicos. A presença de um maior número de sítios As-51 em alguns variantes reforça, de certa forma, a sua origem por intercruzamentos. Os sítios As-51, que se mostraram específicos para algumas formas variantes, poderiam ser decorrentes de rearranjos cromossômicos complementares, propiciando novas localizações desse DNA satélite nos cariótipos.
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Auman, Tzach, Barbara M. I. Vreede, Aryeh Weiss, Susan D. Hester, Terri A. Williams, Lisa M. Nagy, and Ariel D. Chipman. "Dynamics of growth zone patterning in the milkweed bug Oncopeltus fasciatus." COMPANY OF BIOLOGISTS LTD, 2017. http://hdl.handle.net/10150/624657.
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We describe the dynamic process of abdominal segment generation in the milkweed bug Oncopeltus fasciatus. We present detailed morphological measurements of the growing germband throughout segmentation. Our data are complemented by cell division profiles and expression patterns of key genes, including invected and even-skipped as markers for different stages of segment formation. We describe morphological and mechanistic changes in the growth zone and in nascent segments during the generation of individual segments and throughout segmentation, and examine the relative contribution of newly formed versus existing tissue to segment formation. Although abdominal segment addition is primarily generated through the rearrangement of a pool of undifferentiated cells, there is nonetheless proliferation in the posterior. By correlating proliferation with gene expression in the growth zone, we propose a model for growth zone dynamics during segmentation in which the growth zone is functionally subdivided into two distinct regions: a posterior region devoted to a slow rate of growth among undifferentiated cells, and an anterior region in which segmental differentiation is initiated and proliferation inhibited.
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Defferrari, Marina Schumacher. "Ação tóxica da urease de Canavalia ensiformis e do peptídeo recombinante Jaburetox-2Ec sobre Oncopeltus fasciatus (Hemiptera: Lygaidade) :." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2010. http://hdl.handle.net/10183/26606.
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A Canavalia ensiformis é uma leguminosa altamente resistente ao ataque de insetos, e contribuindo para essa resistência, a planta possui isoformas de urease, que são proteínas que apresentam atividade entomotóxica. Essa toxicidade é dependente de uma ativação proteolítica da molécula por enzimas digestivas do inseto, do tipo catepsinas, e subseqüente liberação de peptídeos internos, os quais possuem a ação inseticida. A partir dessa informação foi construído um peptídeo recombinante com base na seqüência da urease, chamado Jaburetox-2Ec, o qual é tóxico para insetos resistentes e suscetíveis a urease intacta. O hemíptero Oncopeltus fasciatus é um dos nossos modelos de estudo. O objetivo deste trabalho foi identificar as principais peptidases digestivas de ninfas de O. fasciatus, auxiliando na elucidação do mecanismo de ação inseticida dessas toxinas, além de estudar os efeitos da urease intacta e do peptídeo derivado sobre órgãos isolados. Quando alimentadas com diferentes concentrações da urease majoritária de C. ensiformis (JBU), ninfas de O. fasciatus apresentam uma taxa de mortalidade superior a 80% após duas semanas, assim como quando injetadas com Jaburetox-2Ec apresentam uma taxa de mortalidade de 100% após 48 horas. Ninfas de quarto instar foram dissecadas para retirada dos intestinos e obtenção de um extrato protéico bruto, o qual foi utilizado para a realização dos ensaios enzimáticos. O extrato bruto foi capaz de hidrolisar in vitro a JBU e liberar peptídeos com massa semelhante a peptídeos entomotóxicos já conhecidos, reconhecíveis pelo anticorpo anti-Jaburetox-2Ec. A atividade proteolítica majoritária sobre substratos protéicos, em pH 4.0, foi bloqueada por inibidores específicos de aspártico e cisteíno peptidases, não sendo afetada EDTA, inibidor de metalopeptidases. Ao utilizar-se um substrato específico para cisteíno peptidases, o pico majoritário observado foi em pH 5.0, sendo a atividade completamente inibida por E-64 (inibidor de cisteíno peptidases) em todos os valores de pH testados. Ao utilizarse um substrato desenhado para aspártico peptidases, a atividade majoritária foi novamente em pH 5.0, sendo parcialmente inibida por Pepstatina A (inibidor de aspártico peptidases) é parcial em todos os valores de pH testados. Substratos sintéticos correspondentes às regiões N e C-terminal que flanqueiam o peptídeo inseticida na molécula de urease também foram testados. O primeiro não foi hidrolisado pelo extrato bruto, enquanto que o segundo apresentou um pico de atividade majoritário em pH 4.0-5.0, com inibição total por E-64. O extrato bruto foi submetido a um processo de purificação de duas etapas, uma troca iônica e uma cromatografia de gel filtração. A purificação foi monitorada utilizando-se um substrato específico para cisteíno peptidases, e a fração da gel filtração com maior atividade apresentou massa molecular de 22 kDa. A fração ativa foi submetida a um gel de poliacrilamida, a banda foi excisada e digerida com tripsina, e os peptídeos resultantes foram então analisados por espectrometria de massas. Uma catepsina L foi identificada, com massa molecular semelhante ao previsto pela gel filtração. Os resultados sugerem que a susceptibilidade de ninfas de O. fasciatus a JBU é, como em outros modelos de insetos, relacionada à proteólise limitada da proteína ingerida e posterior liberação de peptídeos inseticidas por enzimas do tipo catepsinas. Diferentes tipos de catepsinas podem estar liberando os peptídeos inseticidas a partir da urease, sendo que um cisteíno peptidase, tipo Catepsina L, pode ter um papel importante na ativação da proteína em O. fasciatus. Adicionalmente fizemos localização in situ de Jaburetox-2Ec após injeção na hemolinfa e observamos imunoreatividade no sistema nervoso central de ninfas de O. fasciatus, indicando que o peptídeo pode estar agindo neste local. Além dos efeitos tóxicos causados pelos peptídeos derivados da urease, já foram relatados em outros modelos, efeitos causados pela molécula intacta. Testamos, então, o efeito da JBU sobre contrações de intestinos ex vivo de O. fasciatus. Observamos que a urease tem a capacidade de inibir, em algumas concentrações, o efeito excitatório da serotonina sobre as contrações musculares, atividade que não é compartilhada com Jaburetox- 2Ec. Concluímos com os dados gerados nesse estudo, e em estudos prévios, que a toxicidade das ureases não só é devida à ativação proteolítica e liberação de peptídeos, mas também à proteína intacta, que parece estar causando distúrbios em processos de sinalização celular.Jackbean (Canavalia ensiformis) is a legume highly resistant to insects. Contributing to this resistance, the plant contains urease isoforms that are entomotoxic upon the release of internal peptides by insect’s digestive cathepsin-like enzymes. A recombinant peptide, called Jaburetox-2Ec, was built based on urease’s sequence and this peptide is poisonous to all insects tested. The hemipteran bug Oncopeltus fasciatus is one of our models of study. In this work we aimed to identify the main digestive peptidases of O. fasciatus, helping to elucidate the insecticidal mechanism of action of these toxins, and to test the effects of urease and derived peptides upon isolated organs. When fed with different Jackbean major urease (JBU) concentrations, O. fasciatus nymphs showed a mortality rate higher than 80% after two weeks. When injected with Jaburetox-2Ec the mortality rate was 100% after 48 hours. Homogenates of midguts dissected from fourth instars were used to perform proteolytic activity assays. The homogenates hydrolyzed JBU in vitro, yielding a fragment similar in size to known entomotoxic peptides. The major proteolytic activity at pH 4.0 upon protein substrates was blocked by specific aspartic and cysteine peptidases inhibitors, but was not affected by a metalopeptidase inhibitor (EDTA). The optimal activity upon a fluorogenic substrate specific for cysteine peptidases was at pH 5.0, being completely inhibited by E-64 at all pH values tested. The optimal activity upon a fluorogenic substrate designed for aspartic peptidases was again at pH 5.0, being partially blocked by Pepstatin A in the pH range 2 to 10. Fluorogenic substrates corresponding to the Nand C-terminal regions flanking the entomotoxic peptide within urease sequence were also tested. While the N-terminal peptide was not hydrolyzed by the midguts homogenate, the C-terminal peptide was cleaved maximally at pH 4.0-5.0, with complete inhibition by E-64. The midguts homogenate was submitted to ion exchange chromatography followed by gel filtration yielding a 22 kDa protein peak. After SDSPAGE this band was excised from the gel, digested with trypsin and the peptides were analyzed by mass spectrometry. A Cathepsin L was identified. The results suggest that susceptibility of O. fasciatus nymphs to JBU is, like in other insect models, due to limited proteolysis of ingested protein and subsequent release of entomotoxic peptides by Cathepsin-like digestive enzymes. Moreover, we performed in situ localization of Jaburetox-2Ec after injection in the hemolymph, and we observed immunoreactive processes in O. fasciatus nymphs’ central nervous system, indicating that the peptide could be acting there. Besides the poisonous effects caused by urease derived peptides, effects caused by the intact molecule were already described. Hence we tested urease’s effect upon O. fasciatus isolated midguts contractions. We observed that urease is capable of inhibiting, at some concentrations, serotonin excitatory effect on muscular contractions, activity that was not shared with Jaburetox-2Ec. We concluded from the data of this study and previous studies, that urease’s toxicity is not only due to proteolytic activation and release of toxic peptides, but also to the intact molecule, which seems to be causing disturbances in cell signalling.
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Ferreira, Neto Maressa [UNESP]. "Alterações cromossômicas estruturais e evolução caritotípica em Astyanax fasciatus (Teleostei, Characiformes, Characidae)." Universidade Estadual Paulista (UNESP), 2012. http://hdl.handle.net/11449/106492.
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ferreiraneto_m_dr_botib.pdf: 962499 bytes, checksum: 9be614144aaf9c5c40be6a9ceca1908b (MD5)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Neste estudo, espécimens de Astyanax fasciatus capturados no ribeirão Água de Madalena (bacia do alto rio Paraná) foram analisados citogeneticamente, revelando diferentes números diplóides em indivíduos convivendo em simpatria e sintopia, com números cromossômicos de 46, 48 e 50 cromossomos, sendo identificado ainda um cromossomo B acessório em todos os exemplares portadores da fórmula cariotípica com 46 cromossomos. Os exemplares analisados desta espécie foram submetidos às técnicas citogenéticas básicas de coloração com Giemsa, bandamento C e impregnação por nitrato de Prata e técnicas de citogenética molecular, com marcação por fluorocromos base-específicos, hibridação in situ fluorescente com sondas de DNAr 18S, 5S e As51, com sondas teloméricas (TTAGGG)n e também com a microdissecção cromossômica, que resultou da hibridação in situ fluorescente (FISH) utilizando sondas produzidas a partir dos cromossomos B. A região organizadora de nucléolo (NOR) e os sítios de rDNA 18S e 5S mostraram uma distribuição conservada entre os citótipos 2n=46 e 2n=48 cromossomos, sendo que o citótipo de 2n=50 cromossomos apresentou-se de forma diferente com relação aos sítios de rDNA 18S, os quais se apresentaram localizados em cromossomos diferentes. A distribuição da heterocromatina foi pouco variável entre os três citótipos e a região da NOR mostrou-se CG rica quando submetida ao tratamento com Cromomicina A3. Os resultados obtidos com os marcadores moleculares e de citogenética básica mostraram que parece não ocorrer intercruzamentos envolvendo os exemplares dos diferentes citótipos, uma vez que não foram encontradas fórmulas cromossômicas híbridas entre estes citótipos até o presente. Porém, se estes citótipos compartilham uma série de homologias, como evidenciado na análise dos marcadores cromossômicos, também são encontradas diferenças...
In this study, specimens of Astyanax fasciatus were collected at Água da Madalena stream (Botucatu, São Paulo, Brazil) and analyzed cytogenetically, revealing different diploid numbers of individuals living in sympatry and sintopy with chromosome numbers of 46, 48 and 50 chromosomes, still being identified a chromosome B accessory on all copies bearing the karyotype formula with 46 chromosomes. The specimens of this species analyzed were submitted to cytogenetic techniques basic of Giemsa staining, C-banding and Silver nitrate impregnation and molecular cytogenetic techniques, marked by base-specific fluorochromes, fluorescence in situ hybridization with probes 18S rDNA and 5S As51, telomeric probe (TTAGGG)n and also with the chromosome microdissection, resulting in fluorescence in situ hybridization (FISH) using probes generated from chromosome B. The nucleolus organizer regions (NOR) and sites of 5S and 18S rDNA showed a distribution conserved between cytotypes 2n = 46 and 2n = 48 chromosomes, and the cytotype of 2n = 50 chromosomes presented differently with respect to 18S rDNA sites, which are located on different chromosomes presented. The distribution of heterochromatin was somewhat variable among the three cytotypes and NOR region proved CG rich when subjected to treatment with chromomycin A3. The results obtained with the markers and molecular cytogenetics basic showed that appears not to occur intercrosses involving specimens of different cytotypes since it was not found among these formulas chromosomal hybrid cytotypes to the present. However, if these cytotypes share a number of homologies, as evidenced in the analysis of chromosomal markers are also differences that could be a consequence of chromosomal rearrangements complementary, providing new locations of rDNA sites and causing a consequent differentiation and speciation among copies of different cytotypes... (Complete abstract click electronic access below)
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Ferreira, Neto Maressa. "Alterações cromossômicas estruturais e evolução caritotípica em Astyanax fasciatus (Teleostei, Characiformes, Characidae) /." Botucatu, 2012. http://hdl.handle.net/11449/106492.
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Orientador: Fausto ForestiCoorientador: Orlando Moreira Filho
Banca: Roberto Ferreira Artoni
Banca: daniela Cristina Ferreira
Banca: Tatiana Aparecida Voltolin
Resumo: Neste estudo, espécimens de Astyanax fasciatus capturados no ribeirão Água de Madalena (bacia do alto rio Paraná) foram analisados citogeneticamente, revelando diferentes números diplóides em indivíduos convivendo em simpatria e sintopia, com números cromossômicos de 46, 48 e 50 cromossomos, sendo identificado ainda um cromossomo B acessório em todos os exemplares portadores da fórmula cariotípica com 46 cromossomos. Os exemplares analisados desta espécie foram submetidos às técnicas citogenéticas básicas de coloração com Giemsa, bandamento C e impregnação por nitrato de Prata e técnicas de citogenética molecular, com marcação por fluorocromos base-específicos, hibridação in situ fluorescente com sondas de DNAr 18S, 5S e As51, com sondas teloméricas (TTAGGG)n e também com a microdissecção cromossômica, que resultou da hibridação in situ fluorescente (FISH) utilizando sondas produzidas a partir dos cromossomos B. A região organizadora de nucléolo (NOR) e os sítios de rDNA 18S e 5S mostraram uma distribuição conservada entre os citótipos 2n=46 e 2n=48 cromossomos, sendo que o citótipo de 2n=50 cromossomos apresentou-se de forma diferente com relação aos sítios de rDNA 18S, os quais se apresentaram localizados em cromossomos diferentes. A distribuição da heterocromatina foi pouco variável entre os três citótipos e a região da NOR mostrou-se CG rica quando submetida ao tratamento com Cromomicina A3. Os resultados obtidos com os marcadores moleculares e de citogenética básica mostraram que parece não ocorrer intercruzamentos envolvendo os exemplares dos diferentes citótipos, uma vez que não foram encontradas fórmulas cromossômicas híbridas entre estes citótipos até o presente. Porém, se estes citótipos compartilham uma série de homologias, como evidenciado na análise dos marcadores cromossômicos, também são encontradas diferenças... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: In this study, specimens of Astyanax fasciatus were collected at Água da Madalena stream (Botucatu, São Paulo, Brazil) and analyzed cytogenetically, revealing different diploid numbers of individuals living in sympatry and sintopy with chromosome numbers of 46, 48 and 50 chromosomes, still being identified a chromosome B accessory on all copies bearing the karyotype formula with 46 chromosomes. The specimens of this species analyzed were submitted to cytogenetic techniques basic of Giemsa staining, C-banding and Silver nitrate impregnation and molecular cytogenetic techniques, marked by base-specific fluorochromes, fluorescence in situ hybridization with probes 18S rDNA and 5S As51, telomeric probe (TTAGGG)n and also with the chromosome microdissection, resulting in fluorescence in situ hybridization (FISH) using probes generated from chromosome B. The nucleolus organizer regions (NOR) and sites of 5S and 18S rDNA showed a distribution conserved between cytotypes 2n = 46 and 2n = 48 chromosomes, and the cytotype of 2n = 50 chromosomes presented differently with respect to 18S rDNA sites, which are located on different chromosomes presented. The distribution of heterochromatin was somewhat variable among the three cytotypes and NOR region proved CG rich when subjected to treatment with chromomycin A3. The results obtained with the markers and molecular cytogenetics basic showed that appears not to occur intercrosses involving specimens of different cytotypes since it was not found among these formulas chromosomal hybrid cytotypes to the present. However, if these cytotypes share a number of homologies, as evidenced in the analysis of chromosomal markers are also differences that could be a consequence of chromosomal rearrangements complementary, providing new locations of rDNA sites and causing a consequent differentiation and speciation among copies of different cytotypes... (Complete abstract click electronic access below)
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Books on the topic "Fasciatus"
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Standard, Gary W. Reproduction, movements, and population dynamics of the banded drum, Larimus fasciatus, in the Gulf of Mexico. College Station, Tex: Sea Grant College Program, Texas A & M University, 1985.
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Collie, Jeremy S. Feeding habits of the yellowtail flounder and production of its invertebrate prey on Georges Bank. Woods Hole, Mass: Woods Hole Oceanographic Institution, 1985.
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Slater, James Alexander. A catalogue of the Lygaeidae of the world (1960-1994). New York, N.Y: New York Entomological Society, 1995.
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Emmel, Thomas C. A summary of the historical distribution and current status of the Florida tree snail, Liguus fasciatus. Tallahassee, FL: Nongame Wildlife Program, Florida Game and Fresh Water Fish Commission, 1995.
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Boveng, Peter Laurens. Status review of the ribbon seal (Histriophoca fasciata). Seattle, WA: U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, National Marine Fisheries Service, Alaska Fisheries Science Center, 2008.
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Davis, Donald R., and Matthew J. Medeiros. A Revision of the Family Adelidae of the Western Hemisphere (Lepidoptera: Adeloidea). Washington, D.C.: Smithsonian Institution Press, 2023. http://dx.doi.org/10.5479/si.23817864.
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The systematics, morphology, and distributions are reviewed for the New World Adelidae. Four genera (Ceromitia, 51 species; Nemophora, 1 species; Adela, 19 species; Cauchas, 16 species) are currently recognized for North, Central, and South America. Keys to all New World genera and species are provided, as are diagnoses, illustrations, and distributional data. The following species are described as new: Adela atrata, Adela austrina, Adela powelli, Adela stenoptera, Adela striata, Cauchas alaskae, Cauchas clarkei, Cauchas elongata, Cauchas excavata, Cauchas lobata, Cauchas recurvata, Cauchas spinulosa, Cauchas suffusa, Cauchas trifascia, Cauchas vittata, Cauchas wielgusi, Ceromitia aphyoda, Ceromitia barilochensis, Ceromitia beckeri, Ceromitia bicornuta, Ceromitia braziliensis, Ceromitia brevipectinella, Ceromitia capitanea, Ceromitia cerastia, Ceromitia concava, Ceromitia convexa, Ceromitia costaricaensis, Ceromitia elongata, Ceromitia exserta, Ceromitia fasciata, Ceromitia flagellata, Ceromitia furcata, Ceromitia fuscata, Ceromitia inaequalis, Ceromitia karsholti, Ceromitia latapicula, Ceromitia laticlavia, Ceromitia latibasis, Ceromitia latijuxta, Ceromitia lobata, Ceromitia nielseni, Ceromitia nigrifasciata, Ceromitia ovata, Ceromitia pachyphalla, Ceromitia pallidofascia, Ceromitia paraguayensis, Ceromitia parvipectena, Ceromitia petila, Ceromitia sinuata, Ceromitia truncata, Ceromitia unicornuta, and Ceromitia unipectinella. The known world fauna of the monotrysian family Adelidae previously consisted of approximately five genera and 294 species (Nieukerken et al. 2011), occurring in all major geographical regions except Antarctica and New Zealand. Prior to this study, four of these genera, Adela (14 species), Cauchas (5 species), Ceromitia (15 species), and Nemophora (1 species), were known to occur in North and South America, totaling slightly less than 12% of the global diversity of the family. In this study, we are reporting 52 new species, most of which are (36 species) within the large pantropical genus Ceromitia. Additionally, we present gene trees for Adela, Cauchas, Ceromitia, and Nemophora and discuss their phylogenetic relationships.
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author, Affentranger-Kirchrath Angelika, ed. Arte Hotel Bregaglia: Das Kunstereignis-- seine Entdeckungen & Geschichten ; herausgegeben von Progetti d'Arte in Val Bregaglia und Luciano Fasciati ; mit Beiträgen von Angelika Affentranger-Kirchrath [and seven others] ; Fotografien von Andrea Badrutt, Ralph Feiner und Jules Spinatsch. Baden: Hier und Jetzt, 2014.
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Hamburg, Universität, ed. Phänomene und Bedeutung der Energieersparnis bei dem Höhlenfisch Astyanax fasciatus (Characidae). 1988.
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Slater, James A., and Jane E. O'Donnell. A Catalog of the Lyaeidae of the World (1960-1994). American Museum of Natural History, 1995.
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Brook, Ted Stephens. Comparative Study of the Toxicity of Aldrin, Dieldrin and DDT by Injection into the Large Milkweed Bug, Oncopeltus Fasciatus (Dall. ). Creative Media Partners, LLC, 2021.
Find full textBook chapters on the topic "Fasciatus"
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Mehlhorn, Heinz. "Nosophyllus fasciatus." In Encyclopedia of Parasitology, 1. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-642-27769-6_4779-1.
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Miller, Laura T., Lionel Stange, Charles MacVean, Jorge R. Rey, J. H. Frank, R. F. Mizell, John B. Heppner, et al. "Large Milkweed Bug, Oncopeltus fasciatus (Hemiptera: Lygaeidae)." In Encyclopedia of Entomology, 2136–39. Dordrecht: Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-6359-6_1960.
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Cao, Ling, Weimin Wang, Chengtai Yang, and Youji Wang. "Threatened fishes of the world: Trachidermus fasciatus Heckel, 1837 (Cottidae)." In Chinese Fishes, 63–64. Dordrecht: Springer Netherlands, 2007. http://dx.doi.org/10.1007/978-90-481-3458-8_9.
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Llewellyn, G. Craig, and Gerald C. Llewellyn. "The Effects of Patulin on the Development of Oncopeltus fasciatus." In Biodeterioration Research, 261–68. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4757-9453-3_21.
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Shin, Irina, Israel Silman, Cassian Bon, and Lev Weiner. "Membrane-Promoted Unfolding of Torpedo Californica and Bungarus Fasciatus Acetylcholinesterase." In Structure and Function of Cholinesterases and Related Proteins, 438–39. Boston, MA: Springer US, 1998. http://dx.doi.org/10.1007/978-1-4899-1540-5_120.
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Wang, Dongsheng, and Xiuying Wang. "A Study on Hydrological and Hydraulic Features of Trachidermus Fasciatus Migration." In Advances in Water Resources and Hydraulic Engineering, 562–67. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-89465-0_97.
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Panov, Vadim E., and Nadya A. Berezina. "Invasion History, Biology and Impacts of the Baikalian Amphipod Gmelinoides Fasciatus." In Invasive Aquatic Species of Europe. Distribution, Impacts and Management, 96–103. Dordrecht: Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-015-9956-6_10.
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Dingle, Hugh, James F. Leslie, and James O. Palmer. "Behavior Genetics of Flexible Life Histories in Milkweed Bugs (Oncopeltus fasciatus)." In Evolutionary Genetics of Invertebrate Behavior, 7–18. Boston, MA: Springer US, 1986. http://dx.doi.org/10.1007/978-1-4899-3487-1_2.
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Wilkens, Horst. "Evolution and Genetics of Epigean and Cave Astyanax fasciatus (Characidae, Pisces)." In Evolutionary Biology, 271–367. Boston, MA: Springer US, 1988. http://dx.doi.org/10.1007/978-1-4613-1043-3_8.
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Panov, Vadim E. "Establishment of the Baikalian endemic amphipod Gmelinoides fasciatus Stebb. in Lake Ladoga." In The First International Lake Ladoga Symposium, 187–92. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-1655-5_29.
Full textConference papers on the topic "Fasciatus"
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Duxbury, Ashley. "Transcriptome analysis of the large milkweed bug (Oncopeltus fasciatus) testis." In 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.114568.
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Roth, Siegfried. "Dorsoventral patterning in the milkweed bug Oncopeltus fasciatus: An evolutionary perspective." In 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.93934.
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Thomé, Mateus Gomes, ANA PAULA DE SOUZA, VITOR CAMPANA MARTINI, and VINÍCIUS COELHO KUSTER. "O DESENVOLVIMENTO DAS GALHAS DE SAPIUM GLANDULOSUM (EUPHORBIACEAE) INDUZIDAS POR NEOLITHUS FASCIATUS (HEMIPTERA) AFETA A FLUORESCÊNCIA DA CLOROFILA A." In III Congresso Brasileiro de Ciências Biologicas. Revista Multidisciplinar de Educação e Meio Ambiente, 2022. http://dx.doi.org/10.51189/iii-conbracib/7779.
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Introdução: As galhas promovem reorganização dos tecidos da planta hospedeira e consequentemente afetam processos fisiológicos, como a fotossíntese. Objetivo: Avaliar os parâmetros fotossintéticos em Sapium glandulosum, em folhas não galhadas (FNG) e em galhas induzidas por Neolithus fasciatus. Material e Método: As galhas foram avaliadas em três estágios de desenvolvimento: jovem (GJ), madura (GM) e senescente (GS). Handy FluorCam foi utilizado para avaliação da fluorescência da clorofila a, entre as 8h e 10h, após adaptação ao escuro por 30 minutos. Avaliou-se os seguintes parâmetros: F0; Fm; Fv/Fm; (F’m-F)/F’m; NPQ e Rfd. Utilizou-se ANOVA e teste de Tukey, com 5% de significância. Resultados: GM apresentou maiores valores de F0, 99,56 ± 18,24, seguido igualmente pela FNG e GJ, 83,91 ± 8,60 e 83,35 ± 15,51, respectivamente, e pela GS, com 54,45 ± 11,5. Fm teve significâncias similares ao padrão demonstrado para F0. O rendimento quântico do fotossistema II em estado estacionário adaptado à luz, o (F’m-F)/F’m, apresentou valores similares em GM, GS e GJ, 0,46 ±0,04, 0,46 ±0,09 e 0,39 ± 0,10, respectivamente, sendo maiores que a FNG, com 0,31 ± 0,07. O rendimento quântico máximo do fotossistema II (Fv/Fm) apresentou valores similares para todos os tratamentos, ou seja, FNG 0,57 ± 0,14, GJ 0,54 ± 0,16, GM 0,65 ± 0,06 e GS 0,56 ± 0,10. A dissipação não fotoquímica de energia, o NPQ, foi maior na FNG, com 2,11 ± 0,64, seguindo igualmente por GJ e GM, com 0,97 ± 0,51 e 1,19 ± 0,25, respectivamente, e por último pela GS, com 0,56 ± 0,19. O Rfd, um parâmetro empírico usado para avaliar a vitalidade da planta, apresentou significâncias similares ao padrão demonstrado para o NPQ. Conclusão: Concluímos nesse estudo, que a indução da galha pouco afetou o rendimento quântico máximo do fotossistema II em relação a folha não galhada, porém aumentou o (F’m-F)/F’m em vários dos seus estágios de desenvolvimento, mesmo com a dissipação de energia e a vitalidade sendo maiores na FNG.
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COSTA, MARIA JOSINETE ARAUJO, João Henrique da Silva e. Silva, Marcelo Francisco da Silva, and Edilson Rodrigues Matos. "Myxosporidiose em exemplares de Leporinus fasciatus (Bloch, 1794) capturados na bacia do rio Tocantins, porção oriental da região amazônica brasileira." In Parasitologia na perspectiva da Saúde Única. Recife, Brasil: Even3, 2021. http://dx.doi.org/10.29327/133503.27-18.
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Klimova, Liliya, and Fanyusya Kadyrova. "PRODUCTIVITY AND ADAPTIVE CAPACITY OF BUCKWHEAT GENOTYPES IN THE CONDITIONS OF THE PRE-KAMA REGION OF THE REPUBLIC OF TATARSTAN." In XIV All-Russian Scientific and Practical Conference of Young Scientists “Achievements and Prospects of Development of the Agroindustrial Complex of Russia” with international participation, dedicated to the 300th anniversary of the Russian Academy of Sciences., 51–54. TRIA FRC Kazan Scientific Center of RAS, 2024. https://doi.org/10.37071/conferencearticle_67337e40066e67.12214344.
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The paper presents the results of the study of genotypes of common buckwheat on productivity and adaptive capacity. The research was conducted in 2019-2021 at the experimental field of Kazan State Agricultural University and in 2022 at the experimental base of Tatar NIISKh. The results show that the presence of fasciated forms in the population increases the adaptive traits, and the varietal sample K-990 combines a complex of biologically-valuable qualities on adaptability and yield stability.
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Lanzarin, Marilu, Daniel Oster Ritter, Edivaldo Sampaio de Almeida Filho, Eliane Teixeira Mársico, and Mônica Queiroz de Freitas. "Avaliação da Qualidade de Pintado Amazônico (Pseudoplatystoma Fasciatum X Leiarius Marmoratus) Eviscerado e Estocado em Gelo." In XII Latin American Congress on Food Microbiology and Hygiene. São Paulo: Editora Edgard Blücher, 2014. http://dx.doi.org/10.5151/foodsci-microal-223.
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Seabra, Geovana Damazio, Isadora Alves Borges, Thais Oliveira dos Santos, Márcia Cristina Rosa de Sousa, Julia De Morais Teodoro, and Rubens Jorge Silveira. "REVISÃO DE LITERATURA DE INFECÇÕES DOS ESPAÇOS FASCIAIS PROFUNDOS DE ORIGEM ODONTOGÊNICA." In Anais da Jornada Odontológica PUC-Goiás. Recife, Brasil: Even3, 2023. http://dx.doi.org/10.29327/1339128.1-1.
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Goetz, S. M., F. Helling, D. Emrich, T. Weyh, and H. Herzog. "Fasciated nerve-muscle explants for in vitro comparison of magnetic and electrical neuromuscular stimulation." In 2010 32nd Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC 2010). IEEE, 2010. http://dx.doi.org/10.1109/iembs.2010.5627428.
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Fernando, Malsha, and Isuru Wijesekara. "Development of Green Seaweed (Ulva fasciata) Incorporated String Hoppers as a Functional Food." In 2021 From Innovation To Impact (FITI). IEEE, 2021. http://dx.doi.org/10.1109/fiti54902.2021.9833053.
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Van Veen, Kasper J., and Zoran Atanackovic. "The Transformation of Recycled Painted Fascias for use in Automotive Acoustical Applications." In Noise & Vibration Conference & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1999. http://dx.doi.org/10.4271/1999-01-1678.
Full textReports on the topic "Fasciatus"
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Panha, Somsak. Investigation on the host specificity of the glochidium of freshwater pearl mussel, Hyriopsis (Limnoscapha) myersiana (Lea, 1856). Chulalongkorn University, 1991. https://doi.org/10.58837/chula.res.1991.12.
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The reproduction cycle and the host specificity of the freshwater pearl mussel, Hyriopsis (Limnoscapha) myersiana were studies from April 1990 to May 1991. Marsupia were found already in early November but, the peak occurred between December and January. The glochidia will emerge from late November till early March. In the laboratory, mussel took less than 24 hours to release all the glochidia. The experiment on host specificity of the glochidia on the fry of 11 species of fish was carried out, using 4 levels of glochidium concentration. The mortality of the fish after infection was plotted against these exposure levels. After 30-days, the interpolated LE [subscript 50] values (exposure concentration of glochidia that killed 50% of the fry) for Iridescent mystus (Mystus vittatus), Striped catfish (Pangasius sutchi), Yellow mystus (M. nemurus), were 15,000, 20,000, 50,000 respectively. The mortalities were very low in Striped tiger nandid (Pristolepis fasciatus) and Temminck’s kissing gourami (Helotoma temmincki). The most resistant were Sand Goby (Oxyeleotris marmoratus) and Striped tiger nandid, which also gave the highest production of juveniles. Species of Rasbora were not resistant at all, all specimens died soon after infection.
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Thurston, Alison, Logan Gonzalez, Flora Laurent, Elizabeth Corriveau, and Robyn Barbato. Isolation and characterization of bacterial isolates from Alaskan permafrost for synthetic biology applications. Engineer Research and Development Center (U.S.), September 2023. http://dx.doi.org/10.21079/11681/47645.
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Operations in the Artic and other cold regions require technologies that can perform reliably under extreme cold conditions. Permafrost and frozen soils harbor a wide range of microorganisms that have adapted to extremely low temperatures and have unique metabolic capabilities relevant to military operations and that could be exploited to develop biotechnologies optimized for cold environments. Cold-tolerant bacteria (psychrophiles and psychrotrophs) are critical to the development of synthetic biology technologies meant to work in cold environments like the Arctic. Using bacteria isolated from Alaskan permafrost, we applied an experimental pipeline to test the best candidates for use as biological platforms, or chassis, for low-temperature synthetic biology. Since synthetic biology constructs will perform only as well as their chassis, it is critical that circuits expected to perform under extreme cold conditions are housed in chassis that are adapted to those conditions. We identified one permafrost isolate, PTI8, related to Rhodococcus fascians, that is capable of growing from −1°C to at least 25°C and which we experimentally confirmed to uptake and express the broad host range plasmid pBTK519, suggesting PTI8 is a candidate for use as a novel cold-adapted chassis for synthetic biology.