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Journal articles on the topic 'Larvae'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Haug, Joachim T., and Carolin Haug. "Beetle larvae with unusually large terminal ends and a fossil that beats them all (Scraptiidae, Coleoptera)." PeerJ 7 (October 14, 2019): e7871. http://dx.doi.org/10.7717/peerj.7871.

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Larvae, and especially fossil larvae, are challenging to deal with from a purely taxonomic view. Often one cannot determine which species the larvae belong to. Yet, larvae can still contribute to various scientific questions. Especially morphological traits of a fossil larva can be highly informative for reconstructing character evolution. Also the occurrence of specific larval types and larval characters in time and the disappearance of such forms can well be reconstructed also without being able to narrow down the phylogenetic relationship of a larva very far. Here, we report two new beetle

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2

Peña, Renato, and Silvie Dumas. "COMPORTAMIENTO ALIMENTARIO DE LA LARVA DEL HUACHINANGO DEL PACÍFICO Lutjanus peru (NICHOLS & MURPHY, 1922) (PERCOIDEI: LUTJANIDAE) AL INICIO DE LA ALIMENTACIÓN EXÓGENA." CICIMAR Oceánides 30, no. 2 (2015): 7. http://dx.doi.org/10.37543/oceanides.v30i2.147.

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El comportamiento alimentario de larvas del huachinango del Pacífico fue estudiado bajo condiciones controladas, con énfasis especial durante el inicio de la alimentación exógena (al tercer día después de la eclosión). Durante un periodo de cinco minutos fueron observadas de manera individual diez larvas de L. peru, antes y después de ser alimentadas con rotíferos (Brachionus rotundiformis) y nauplios de copépodos (Euterpina acutifrons) en densidades de 5 presas/ml. Para describir parte del comportamiento relacionado con el evento de alimentación se registró el número de veces que las larvas a

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Peña, Renato, and Silvie Dumas. "COMPORTAMIENTO ALIMENTARIO DE LA LARVA DEL HUACHINANGO DEL PACÍFICO Lutjanus peru (NICHOLS & MURPHY, 1922) (PERCOIDEI: LUTJANIDAE) AL INICIO DE LA ALIMENTACIÓN EXÓGENA." CICIMAR Oceánides 30, no. 2 (2015): 7. http://dx.doi.org/10.37543/oceanides.v30i2.147.

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El comportamiento alimentario de larvas del huachinango del Pacífico fue estudiado bajo condiciones controladas, con énfasis especial durante el inicio de la alimentación exógena (al tercer día después de la eclosión). Durante un periodo de cinco minutos fueron observadas de manera individual diez larvas de L. peru, antes y después de ser alimentadas con rotíferos (Brachionus rotundiformis) y nauplios de copépodos (Euterpina acutifrons) en densidades de 5 presas/ml. Para describir parte del comportamiento relacionado con el evento de alimentación se registró el número de veces que las larvas a

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4

Minoshima, Yûsuke N. "First known larva of omicrine genus Psalitrus d'Orchymont (Coleoptera, Hydrophilidae)." Deutsche Entomologische Zeitschrift 66, no. (1) (2019): 107–18. https://doi.org/10.3897/dez.66.34300.

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The larval morphology of the water scavenger beetle Psalitrus yamatensis Hoshina & Satô, 2005 is described based on a specimen collected from Fukuoka Prefecture, Kyushu, Japan. This is the first description of the larval morphology of the hydrophilid genus Psalitrus d'Orchymont, 1919, as well as the first description of larval chaetotaxy of the tribe Omicrini. Species-level identification of the larva was performed using DNA barcoding of a molecular marker: a 658 bp fragment of the mitochondrial cytochrome oxidase I. A description including chaetotaxy of head capsule and head appendages, d

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5

HOANG, DUC HUY, and YEON JAE BAE. "Vietnamese species of Stenopsyche McLachlan (Trichoptera: Stenopsychidae)." Zootaxa 1624, no. 1 (2007): 1–15. http://dx.doi.org/10.11646/zootaxa.1624.1.1.

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Larvae of the net-spinning caddisfly Stenopsyche McLachlan are very common in Vietnamese streams. Six species of Stenopsyche have previously been recorded from Vietnam. Based on comprehensive field studies throughout Vietnam between 2001 and 2003, the following species of Stenopsyche were recognized from the country: S. angustata Martynov 1930 (new Vietnamese record: male, female, and larva), S. dakpri sp. nov. (male, female, and larva), S. siamensis Martynov 1931 (new Vietnamese record: male, female, and larva), S. ulmeri Navás 1932 (male, female, and larva), and two additional larval forms (

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6

Sheehan, Gerard, Laura Tully, and Kevin A. Kavanagh. "Candida albicans increases the pathogenicity of Staphylococcus aureus during polymicrobial infection of Galleria mellonella larvae." Microbiology 166, no. 4 (2020): 375–85. http://dx.doi.org/10.1099/mic.0.000892.

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This study detailed the responses of Galleria mellonella larvae to disseminated infection caused by co-infection with Candida albicans and Staphylococcus aureus . Doses of C. albicans (1×105 larva−1) and S. aureus (1×104 larva−1) were non-lethal in mono-infection but when combined significantly (P<0.05) reduced larval survival at 24, 48 and 72 h relative to larvae receiving S. aureus (2×104 larva−1) alone. Co-infected larvae displayed a significantly higher density of S. aureus larva−1 compared to larvae infected solely with S. aureus . Co-infection resulted in dissemination throughout the

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7

Zakiyabarsi, Furqan, Muhammad Niswar, and Zahir Zainuddin. "Crab Larvae Counter Using Image Processing." EPI International Journal of Engineering 2, no. 2 (2019): 127–31. http://dx.doi.org/10.25042/epi-ije.082019.06.

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Very small larval size, high mortality rate of crab larvae, the absence of an accurate crab larva counter at affordable price, the density of larvae that are not known accurately, the ratio of feed that not in accordance with the number of larvae to damage water quality and cannibalism, water quality can not be adjusted to the density of distribution, and economically unprofitable both in terms of feed efficiency and buying and selling transactions. By knowing the number of crab larvae accurately the survival rate of crab larvae increases and is economically beneficial. In this study larvae co

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8

Welborn, J., and D. Manahan. "Taurine metabolism in larvae of marine invertebrate molluscs (Bilvalvia, Gastropoda)." Journal of Experimental Biology 198, no. 8 (1995): 1791–99. http://dx.doi.org/10.1242/jeb.198.8.1791.

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Nonfeeding larvae of the gastropod Haliotis rufescens maintained a constant amount of taurine during embryonic and larval development and, since no de novo synthesis of taurine was observed in these larvae, the maternal endowment of taurine to the egg was sufficient for larval development to metamorphosis. In contrast, feeding larvae of the bivalve Crassostrea gigas increased their taurine content by a factor of 43 during growth to metamorphosis (from 86 to 311 &micro;m, valve length). Taurine was not present in algae used to feed the larvae, suggesting that de novo synthesis of taurine by

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9

Zavala-Leal, I., S. Dumas-Lapage, and R. Peña-Martinez. "ORGANOGÉNESIS DURANTE EL PERIODO LARVAL EN PECES." CICIMAR Oceánides 26, no. 2 (2011): 19. http://dx.doi.org/10.37543/oceanides.v26i2.100.

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La presencia de un periodo larval caracteriza a los peces con ontogenia indirecta. Este periodo de desarrollo implica una serie de transformaciones encaminadas a la adquisición de las características biológicas y ecológicas propias de la especie; y en muchos casos culmina con cambios de distribución y hábitos alimenticios. El periodo larval incluye cuatro estadios de desarrollo: larva vitelina, larva pre-flexión, larva flexión y larva post-flexión. Cada estadio de desarrollo presenta características asociados a cambios en las diferentes prioridades durante el crecimiento. De esta forma, durant

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10

Minoshima, Yûsuke N. "First known larva of omicrine genus Psalitrus d’Orchymont (Coleoptera, Hydrophilidae)." Deutsche Entomologische Zeitschrift 66, no. 1 (2019): 107–18. http://dx.doi.org/10.3897/dez.66.34300.

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The larval morphology of the water scavenger beetlePsalitrusyamatensisHoshina &amp; Satô, 2005 is described based on a specimen collected from Fukuoka Prefecture, Kyushu, Japan. This is the first description of the larval morphology of the hydrophilid genusPsalitrusd’Orchymont, 1919, as well as the first description of larval chaetotaxy of the tribe Omicrini. Species-level identification of the larva was performed using DNA barcoding of a molecular marker: a 658 bp fragment of the mitochondrial cytochrome oxidase I. A description including chaetotaxy of head capsule and head appendages, di

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11

OROZCO, JESUS, and LUIS C. PARDO-LOCARNO. "Description of immature stages of three species of American Cetoniinae (Coleoptera: Scarabaeidae: Cetoniinae)." Zootaxa 769, no. 1 (2004): 1. http://dx.doi.org/10.11646/zootaxa.769.1.1.

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The larvae and pupae of three Cetoniinae scarab beetles, Gymnetis pantherina Blanchard, 1837; Gymnetis holosericea (Voet, 1779), and Euphoria precaria Janson, 1881 from Colombia are described. Multiple color patterns of adults and key larval characters are illustrated for each species for the first time. The described larvae of Gymnetis MacLeay are included in a key to the larvae of the genus, now with five species; and Euphoria precaria is added to the extant key of the known Euphoria larvae. New distributional records for the country are presented and some comments on the biology of the spec

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12

Mehdi, N. M., H. F. Al-Rubeae, and M. A. Ali. "Laboratory evaluation of azadirachtin isolated from Melia azedarach L. fruits against Anopheles pulcherrimus Theobald (Diptera: Culicidae)." Journal of Biotechnology Research Center 8, no. 2 (2014): 51–56. http://dx.doi.org/10.24126/jobrc.2014.8.2.331.

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Efficacy of different concentration of azadirachtin isolated from fruits of Melia azedarach was investigated on the different stages of Anopheles pulcherrimus under lab. condition. Results showed that there was non-significant reduction in eggs hatching rate. There were high significant in larval mortalities which were depending on concentration. Different larval deformities were found. Second instars larvae were more sensitive then fourth larva instar , LC50 and LC90 for the second instars larvae were 35.99 and 67.99 ppm respectively and for the fourth instars larvae it was 63.09 and 139.8 re

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13

Nagler, Christina, Jens T. Høeg, Carolin Haug, and Joachim T. Haug. "A possible 150 million years old cirripede crustacean nauplius and the phenomenon of giant larvae." Contributions to Zoology 86, no. 3 (2017): 213–27. http://dx.doi.org/10.1163/18759866-08603002.

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The larval phase of metazoans can be interpreted as a discrete post-embryonic period. Larvae have been usually considered to be small, yet some metazoans possess unusually large larvae, or giant larvae. Here, we report a possible case of such a giant larva from the Upper Jurassic Solnhofen Lithographic limestones (150 million years old, southern Germany), most likely representing an immature cirripede crustacean (barnacles and their relatives). The single specimen was documented with up-to-date imaging methods (macro-photography, stereo-photography, fluorescence photography, composite imaging)

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14

Pedersen, Eric J., Ryan R. E. Stanley, Paul V. R. Snelgrove, and Frédéric Guichard. "Experimental evidence for concentration-dependence and intraspecific variation of movement behaviour in American lobster (Homarus americanus) larvae." Canadian Journal of Zoology 95, no. 10 (2017): 759–70. http://dx.doi.org/10.1139/cjz-2016-0100.

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Predicting dispersal paths of marine larvae with extended pelagic durations, such as American lobster (Homarus americanus H. Milne Edwards, 1837), requires understanding the cues to which larvae respond, and how that response reflects changes in larval behaviour. If larvae respond to conspecific presence by varying their movement, then this behaviour can bias laboratory estimates of environmental responses. We tested whether larvae actively decreased their local intraspecific density by measuring how the vertical distribution of larvae changed under high versus low concentrations of conspecifi

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15

Maysaroh, Ummi, Edhi Martono, and Tri Harjaka. "The Potency of Metarhizium anisopliae in Disturbing Oryctes rhinoceros (Coleoptera: Scarabaeidae) Growth and Development." Jurnal Perlindungan Tanaman Indonesia 26, no. 1 (2022): 51. http://dx.doi.org/10.22146/jpti.71755.

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Metarhizium anisopliae is one of the most frequently used insect pathogen fungi in controlling Oryctes rhinoceros. This research aims to learn the potency of fungus M. anisopliae against O. rhinoceros larvae growth and development at the laboratory. The research methods used are T-tests comprising seven treatments and three replications. Fungi were applied in all larvae instar stages starting from the pre-molting of the first larvae instar, post-molting of the second larvae instar, active second larvae instar, pre-molting of the second larvae instar, post-molting of the third larvae instar, ac

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16

Dzepe, D., P. Nana, A. Fotso, T. Tchuinkam, and R. Djouaka. "Influence of larval density, substrate moisture content and feedstock ratio on life history traits of black soldier fly larvae." Journal of Insects as Food and Feed 6, no. 2 (2020): 133–40. http://dx.doi.org/10.3920/jiff2019.0034.

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Performance and body composition of insect larvae depend on quality and quantity of their diet, and on biotic factors such as larval density. Experiments were undertaken to assess the effects of larval density, substrate moisture content and feedstock ratio on larval life history parameters of black soldier fly (BSF) in the laboratory. Four-day-old larvae were separately reared under six different densities (1, 2, 4, 6, 8 and 10 larvae/cm2) and at five substrate moisture content levels (40, 50, 60, 70 and 80%) obtained by moistening feed with fresh water. Five feedstock ratios of 25, 50, 100,

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17

Melianawati, Regina, Ni Wayan Widya Astuti, and Tridjoko Tridjoko. "Peranan Taurin pada Pertumbuhan dan Kelangsungan Hidup Larva Ikan Kerapu Bebek Cromileptes altivelis (Valenciennes, 1828)." Jurnal Kelautan Tropis 26, no. 1 (2022): 27–34. http://dx.doi.org/10.14710/jkt.v26i1.13490.

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Taurine is an important amino acid for the growth of marine fish larvae The humpback grouper (Cromileptes altivelis) is a highly valuable marine fish that has been farmed in hactheries. The increasing of larval growth and survival rate of humpback grouper was carried out by taurine addition as enrichment ingredient to zooplankton as live feed for larvae. The purpose of this study was to find out the role of taurine on larval growth and survival rate. Two treatments tested were taurine addition by bioencapsulated through zooplankton rotifers Brachionus rotundiformis (A) and without taurine addi

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18

Taira, K., V. Šnábel, N. Okada, and Y. Saitoh. "Effect of low temperatures on the infectivity of Toxocara cati larvae parasitized in mouse tissues." Helminthologia 50, no. 2 (2013): 83–86. http://dx.doi.org/10.2478/s11687-013-0112-8.

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AbstractThe infectivity of Toxocara cati larvae in mouse tissues, following storage at 4 °C and −25 °C, was measured using a bioassay in mice. Tissues of donor mice infected with 30-day-old T. cati larvae were stored at 4 °C for 7 and 14 days, and at −25 °C for 24 hours, then tissue larvae were inoculated into recipient mice (n = 6/group). After 15 days, larval burden in recipient mice was assessed by digestion. In the control group, a mean of 42.0 % of the inoculated larvae were established in mice. Storage of tissues at 4 °C for 7 and 14 days did not affect larval infectivity; means of 43.5

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19

Smith, M. A. H., and R. J. Lamb. "Causes of variation in body size and consequences for the life history of Sitodiplosis mosellana." Canadian Entomologist 136, no. 6 (2004): 839–50. http://dx.doi.org/10.4039/n03-122.

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AbstractThe body sizes of mature larvae and adults from field and laboratory populations of the wheat midge, Sitodiplosis mosellana (Géhin) (Diptera: Cecidomyiidae), were measured to determine possible causes of variation in size and consequences of such variation through the life history. Mature larvae varied eightfold in mass. Female larvae were 80% heavier than males, on average. Variation in mass was associated with both the position of larvae on a wheat spike and the number feeding together on a developing seed. Larvae were 9% smaller when they developed on smaller, later developing seeds

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Çelik, İhsan, and Pinar Çelik. "Larval Development of Penguin Tetra (Thayeria boehlkei): Morphological Observations." Journal of Agricultural Production 5, no. 2 (2024): 97–105. http://dx.doi.org/10.56430/japro.1464516.

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In this study, the larval development stage of the penguin tetra fish (Thayeria boehlkei), a popular species in the freshwater aquarium fish industry, was investigated. For this purpose, penguin tetra larvae were morphologically observed from time to hatching until they reached the juvenile stage. Throughout the larval development phase, samples were randomly taken daily and captured on a camera using a stereomicroscope. Larval development stages were categorized into four periods: (I) Yolk-sac larva, (II) Pre-flexion larva, (III) Flexion larva, and (IV) Post-flexion larva. Larvae were fed wit

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21

EKINGEN, PINAR, and NILGUN KAZANCI. "Larval description of Rhyacophila osellai Malicky, 1981 (Trichoptera: Rhyacophilidae) with some notes on its habitat." Zoosymposia 14, no. 1 (2019): 211–14. http://dx.doi.org/10.11646/zoosymposia.14.1.23.

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The unknown larva of Rhyacophila osellai Malicky, 1981 is described, and its diagnostic features illustrated. Mature pupae of R. osellai were identified from the male genitalia, and were associated with the larval stage by the metamorphotype method. Because larvae of caddisflies are used in biological monitoring studies, descriptions of unknown larvae are important to improve the knowledge of relationships between larvae and water quality.

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TORII, TAKAAKI, and MASATOSHI NAKAMURA. "DNA identification and morphological description of the larva of Eoneureclipsis montanus (Trichoptera, Psychomyiidae)." Zoosymposia 10, no. 1 (2016): 424–31. http://dx.doi.org/10.11646/zoosymposia.10.1.39.

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Six genera of Psychomyiidae (Trichoptera) are known from Japan: Psychomyia, Tinodes, Lype, Metalype, Eoneureclipsis and Paduniella. A psychomyiid larva presumed to be Eoneureclipsis montanus was collected in Japan. We compared the COI sequence data of this putative E. montanus larva with those of identified adults to associate adult and larval life stages. Molecular evidence is presented to support the relationship between adults and larvae of E. montanus in Japan. Illustrations of E. montanus larval characters and a key and character matrix to genera of mature larvae of Japanese psychomyiids

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23

Hare, James F. "Discrimination of nestmate larvae by the ant Leptothorax longispinosus." Canadian Journal of Zoology 74, no. 11 (1996): 2055–61. http://dx.doi.org/10.1139/z96-233.

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Laboratory colonies of the ant Leptothorax longispinosus were presented with 10 larvae each from their own nest, conspecific larvae from a nest collected from the same site of origin, and conspecific larvae from a nest collected from another site in the same geographical region. Workers preferentially retrieved larvae from their own nest over those from nests obtained at the same site and other sites. Non-nestmate larvae from the same site were not preferred over those originating from other collection sites. Thus, L. longispinosus workers discriminate among conspecific larvae and preferential

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24

Fauzi Mansur, Fadlul Azim. "Cutaneous Larva Migrans on the Hand." Malaysian Journal of Science Health & Technology 7, no. 3 (2021): 57–59. http://dx.doi.org/10.33102/mjosht.v7i3.184.

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Cutaneous larva migrans results from infection by zoonotic nematode larvae, usually by animal hookworm larvae, and is a condition that is not uncommon in rural communities. The usual site of this lesion is on the feet, where larval penetration from soil takes place. Unusual sites such as the upper extremity and groin are very rare. We report a case of cutaneous larva migrans on the hand (unusual site) from Kelantan, Malaysia.

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von Knoblauch, Tammo, Annette B. Jensen, Christoph K. W. Mülling, Anton Heusinger, Heike Aupperle-Lellbach, and Elke Genersch. "Stonebrood Disease—Histomorphological Changes in Honey Bee Larvae (Apis mellifera) Experimentally Infected with Aspergillus flavus." Veterinary Sciences 12, no. 2 (2025): 124. https://doi.org/10.3390/vetsci12020124.

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Stonebrood (Aspergillus sp.) is a rare, poorly described disease of the Western honey bee (Apis mellifera) that can affect adult bees and brood. This study describes the pathogenesis using artificially reared pathogen-free Apis mellifera larvae, experimentally infected (5 × 102 spores/larva) with Aspergillus flavus. Between days 1 and 5 p.i. (larval age 4 until 8 days), five uninfected control larvae, up to five infected living larvae, and up to five infected dead larvae were examined macroscopically. Subsequently, the larvae were photographed, fixed (4% formaldehyde), and processed for histol

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26

Ali, M. Ibrahim, S. Y. Young, G. W. Felton, and D. A. Streett. "Influence of Cotton Plant Structures on Heliothine Larval Development and the Production and Infectivity of Occlusion Bodies of Nucleopolyhedrovirus in Larvae." Journal of Entomological Science 38, no. 3 (2003): 368–76. http://dx.doi.org/10.18474/0749-8004-38.3.368.

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Helicoverpa zea (Boddie) and Heliothis virescens (F.), reared on different cotton structures, were studied for larval growth and development, susceptibility to H. zea nucleopolyhedrovirus (HzNPV), and production of occluded virus (OBs). Larval weight of both species after 10 d of rearing differed with larvae on artificial diet having the highest weight and those on square bracts the lowest weight. In both species, pupal weight and length of pupal developmental period were positively correlated with the larval weight, but length of the larval developmental period was negatively correlated with

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P.K. DALAL and RAMESH ARORA. "Impact of temperature on food consumption and nutritional indices of tomato fruit borer, Helicoverpa armigera (Hübner) (Noctuidae: Lepidoptera)." Journal of Agrometeorology 18, no. 1 (2016): 62–67. http://dx.doi.org/10.54386/jam.v18i1.901.

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Rising temperatures under changing climatic conditions results in the increase in food intake by the insect pests. The present studies on effect of different alternating temperatures on food consumption and nutritional indices of Helicoverpa armigera (Hübner) on tomato crop were conducted during 2013-14. The total food consumption by H. armigera larvae during total (third to fifth instar) larval duration increased from 2.457±0.048 g/larvae at 25:10oC to 3.545±0.021 g/larva at 30:16oC. This suggests that with increase in temperature there is increase in food consumption by H. armigera larvae. T

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Sunaryo, Sunaryo, I. Nyoman Widiasa, Ali Djunaedi, and Priyo Sasmoko. "Mortalitas Larva Litopenaeus vannamei Pada Penerapan Perbedaan Sistem Filtrasi Air Media Pemeliharaan." Jurnal Kelautan Tropis 21, no. 2 (2018): 103. http://dx.doi.org/10.14710/jkt.v21i2.3089.

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Mortality of Litopenaeus vannamei larvae with the different filtration system of seawater as media for rearingMortality of Litopenaeus vannamei larvae in shrimp hatcheries centers is commonly high. Therefore, innovation to solve the problem through water quality management improvement in necessary by applying ultrafiltration system to shrimp hatchery. This experiment aims to determine larval mortality rate in response to the application of different filtration systems. Experiments were conducted using 4 milions larvae of L. vannamei shrimp. Shrimp larvae were kept in 4 tanks, each volume was 8

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Einer, H., and E. Ellegård. "Nasal myiasis by Oestrus ovis second stage larva in an immunocompetent man: case report and literature review." Journal of Laryngology & Otology 125, no. 7 (2011): 745–46. http://dx.doi.org/10.1017/s002221511100096x.

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AbstractObjective:We report a case of an Oestrus ovis larva which developed into the second larval stage within a healthy, immunocompetent human, and we review the relevant literature.Methods:Clinical case report and Pubmed search of reports of human nasal myiasis due to Oestrus ovis, especially those describing the larval stage.Results:Humans are not normally hosts of the sheep nasal bot fly, but infestations by its larvae have been described. The eye is the most common site, but larvae have occasionally been found in the human nose. Transformation of larvae into the second and third stages,

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ARCHANGELSKY, MIGUEL, and MARIANO C. MICHAT. "Morphology and chaetotaxy of the larval stages of Andogyrus seriatopunctatus Régimbart (Coleoptera: Adephaga: Gyrinidae)." Zootaxa 1645, no. 1 (2007): 19–33. http://dx.doi.org/10.11646/zootaxa.1645.1.2.

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The larval stages of Andogyrus seriatopunctatus Régimbart are described and illustrated, including morphometric and chaetotaxic characters. A larval ground pattern for the chaetotaxic characters is presented; it is based on first instar larvae of A. seriatopunctatus. Unidentified larvae of Dineutus MacLeay and a third instar larva of Gyrinus argentinus Steinheil were also inspected. For chaetotaxic homologization comparisons with other adephagan families were performed, mainly with Carabidae and Dytiscidae. The ground pattern is considered provisional due to the lack of previous studies in thi

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Clemen, Günter, and Hartmut Greven. "Long-term effects of arrested metamorphosis on dental systems in Salamandra salamandra (Salamandridae: Urodela)." Vertebrate Zoology 68, no. 2 (2018): 143–55. http://dx.doi.org/10.3897/vz.68.e31600.

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We describe the dental systems of six larvae of Salamandra salamandra hypophysectomized in 1976 under an earlier project to arrest metamorphosis. Larvae cover roughly three developmental stages from early (intrauterine) larval stage to early metamorphosis. Animals survived surgery and lived up to 16 months until fixation. One specimen was studied by histological serial sections. In the period until fixation larvae grew from approximately 3 cm to 7 cm in length (dependent on the developmental stage before surgery) retaining their larval appearance. Changes in the dental systems depended on the

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Clemen, Günter, and Hartmut Greven. "Long-term effects of arrested metamorphosis on dental systems in Salamandra salamandra (Salamandridae: Urodela)." Vertebrate Zoology 68 (July 27, 2018): 143–55. https://doi.org/10.3897/vz.68.e31600.

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We describe the dental systems of six larvae of Salamandra salamandra hypophysectomized in 1976 under an earlier project to arrest metamorphosis. Larvae cover roughly three developmental stages from early (intrauterine) larval stage to early metamorphosis. Animals survived surgery and lived up to 16 months until fixation. One specimen was studied by histological serial sections. In the period until fixation larvae grew from approximately 3 cm to 7 cm in length (dependent on the developmental stage before surgery) retaining their larval appearance. Changes in the dental systems depended on the

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Alzmann, Norbert, Bernd Köhler, and Gerhard Maier. "Spatial Distribution, Food and Activity of Gomphus pulchellus SELYS 1840 (Insecta; Odonata; Gomphidae) from a Still Water Habitat." International Review of Hydrobiology 84, no. 3 (1999): 299–313. http://dx.doi.org/10.1002/iroh.199900031.

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AbstractDistribution patterns of Gomphus pulchellus larvae in different sediments with different density of prey organisms were studied in the field in a small gravel pit lake in the south of Germany. Larval burrowing behaviour at different temperatures as well as food preference, consumption rates and activity were studied in laboratory experiments. In the study lake G. pulchellus larvae lived exclusively in places where macrophytes were present and in fine sediments (mean grain size <3 mm) with detritus cover. There was a significant positive correlation between larval density and density

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PIETRYKOWSKA-TUDRUJ, EWA, and BERNARD STANIEC. "Comparative larval morphology of Platydracus and Staphylinus (Staphylinidae: Staphylinini: Staphylinina) with notes on their biology and redescription of the pupa of Staphylinus." Zootaxa 3580, no. 1 (2012): 24. http://dx.doi.org/10.11646/zootaxa.3580.1.2.

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The mature larva of Platydracus latebricola (Gravenhorst, 1806) is described for the first time and the larva and pupa of Staphylinus erythropterus Linné, 1758 are redescribed. Illustrations of structural features are provided. The combination of characters that allow for distinguishing the known mature larvae of Platydracus, and larvae and pupae of Staphylinus from closely related genera within tribe Staphylinini are given. The mature larvae of Platydracus and Staphylinus are compared and the generic status of the former is confirmed. Life history data under laboratory conditions of S. erythr

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von Knoblauch, Tammo, Annette B. Jensen, Christoph K. W. Mülling, Heike Aupperle-Lellbach, and Elke Genersch. "Chalkbrood Disease Caused by Ascosphaera apis in Honey Bees (Apis mellifera)—Morphological and Histological Changes in Infected Larvae." Veterinary Sciences 11, no. 9 (2024): 415. http://dx.doi.org/10.3390/vetsci11090415.

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Chalkbrood is a mycological brood disease of the Western honey bee (Apis mellifera), caused by the fungus Ascosphaera apis. The aim of this study was the investigation of the pathology of artificially reared Apis mellifera larvae, experimentally infected with A. apis spores (1.0 × 103 spores/larva). Non-infected larvae served as control. Five living larvae and every dead larva were collected daily (day 1–7 p.i.). All larvae were macroscopically measured, photographed, formalin-fixed, and histologically processed (hematoxylin-eosin stain, Grocott silvering). Histological sections were digitized

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Prabowo, Heri, and I. G. A. A. Indrayani. "Keefektifan Nematoda Patogen Serangga Steinernema sp. Terhadap Achaea janata L., Serangga Pemakan Daun Jarak Kepyar (Ricinus communis)." Buletin Tanaman Tembakau, Serat & Minyak Industri 5, no. 2 (2016): 58. http://dx.doi.org/10.21082/bultas.v5n2.2013.58-68.

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<p>Penggunaan pestisida kimia yang cukup tinggi pada akhir-akhir ini telah menimbulkan dampak negatif ter-hadap lingkungan, sehingga pengendalian hama yang ramah lingkungan sangat diperlukan. Saat ini, peng-gunaan nematoda entomopatogen terutama Steinernema sp., membuka peluang untuk digunakan sebagai pengendalian Achaea janata. Tujuan dari penelitian ini untuk mengetahui keefektifan Steinernema sp. ter-hadap A. Janata , dilaksanakan di laboratorium patologi serangga Balai Penelitan Tanaman Pemanis dan Serat pada bulan Maret sampai dengan Agustus 2011. Penelitian menggunakan rancanagan a

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Melianawati, Regina, Ni Wayan Widya Astuti, and Tridjoko. "PERTUMBUHAN LARVA DAN PRODUKSI BENIH IKAN KERAPU BEBEK Cromileptes altivelis Valenciennes, 1828 HASIL BUDIDAYA TURUNAN KE-3." Jurnal Ilmu dan Teknologi Kelautan Tropis 10, no. 3 (2018): 589–600. http://dx.doi.org/10.29244/jitkt.v10i3.20322.

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ABSTRAKKetersediaan induk dalam suatu usaha pembenihan memiliki peran yang sangat penting. Namun demikian, ketersediaan induk yang berasal dari alam sangat terbatas jumlahnya, sehingga perlu dilakukan penyediaan calon induk yang berasal dari hasil budidaya. Ikan kerapu bebek Cromileptes altivelis Valenciennes, 1828 turunan pertama (F-1) dan turunan kedua (F-2) sudah dapat diproduksi dari hasil budidaya, namun benih turunan ketiga (F-3) belum dapat diperoleh. Penelitian ini bertujuan untuk mendapatkan karakteristik morfologis dan pertumbuhan larva ikan kerapu bebek F-3 sebagai calon induk F-3,

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Salam, Md Abdus, Shishir Biswas, Md Sazzad Hossain, Nur-A. Sultana, and Md Jasim Uddin. "Temporal changes in glochidia larval occurrence and condition index in freshwater mussels, Lamellidens marginalis (Lamarck, 1819) collected from a wetland of Bangladesh." Journal of Fisheries 12, no. 2 (2024): 122203. http://dx.doi.org/10.17017/j.fish.684.

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Information on glochidia larval occurrence and release time from the brooding mussels are crucial for the development of larval rearing system or commercial collection of juveniles from the wilds. We report monthly changes in glochidia larval occurrence and condition index (CI) in freshwater mussel, Lamellidens marginalis, collected from a wetland in Bangladesh. Specimens were drawn monthly over a year from October 2021 to September 2022. Lamellidens marginalis females displayed glochidia larvae in the supra-branchial chamber over ten months from March to December. No glochidia larva was repor

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Ediriweera, ERHSS. "Evaluation of Anthelmintic properties of Sesbania grandiflora Pers. (Kathurumurunga) against larvae of Toxocara canis and Haemonchus contortus – In Vitro Study." Healer 2, no. 1 (2021): 42–47. http://dx.doi.org/10.51649/healer.15.

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Sesbania grandiflora is a slender tree. It is a common garden plant in Sri Lanka, which grows well in mid and low country. In Sri Lanka, Sesbania grandiflora is used as a home remedy, in treatment of worm infections in humans. Toxocara canis is a helminth parasite infecting dogs and other canids. It also causes toxocariasis in humans. Haemonchus contortus is a nematode that infects goats and causes anaemia, marked reduction in growth and reproduction, and even death. Using this information, in vitro larvae migratory inhibition assay was carried out on Toxocara canis and Haemonchus contortus la

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Cattaneo, Arianna, Simona Belperio, Luca Sardi, et al. "Black Soldier Fly Larvae’s Optimal Feed Intake and Rearing Density: A Welfare Perspective (Part II)." Insects 16, no. 1 (2024): 5. https://doi.org/10.3390/insects16010005.

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The large-scale insect rearing sector is expected to grow significantly in the next few years, with Hermetia illucens L. (black soldier fly, BSF) playing a pivotal role. As with traditional livestock, it is essential to improve and ensure BSF welfare. A starting point can be an adaptation of the Five Freedoms framework. Feed availability must be optimized to meet larvae nutritional needs (freedom from hunger) while maximizing substrate conversion efficiency. Similarly, rearing density needs to be optimized to ensure well-being, particularly in large-scale operations. In this study, Control (co

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Chynoweth, R. J., J. W. M. Marris, K. F. Armstrong, A. Chomic, J. Linton, and R. B. Chapman. "Predation by Ostenia robusta on Costelytra zealandica pupae." New Zealand Plant Protection 66 (January 8, 2013): 157–61. http://dx.doi.org/10.30843/nzpp.2013.66.5582.

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Soil sampling in a cereal crop near Southbridge Canterbury revealed dipteran larvae attacking Costelytra zealandica (White) pupae Approximately 50 of the pupae had larvae associated with them DNA sequencing analysis of larval specimens indicated they most likely belonged to the family Dolichopodidae Larval specimens were reared through to adults and were identified as Ostenia robusta (Hutton) (Diptera Dolichopodidae) This is the first record of the association of O robusta larvae with C zealandica pupae A general description of the adult and larva of this species is provided along with DNA seq

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RONDEROS, MARÍA M., CARLA G. CAZORLA, and GUSTAVO R. SPINELLI. "The immature stages of the biting midge Culicoides debilipalpis Lutz (Diptera: Ceratopogonidae)." Zootaxa 2716, no. 1 (2019): 42. http://dx.doi.org/10.11646/zootaxa.2716.1.3.

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The fourth instar larva and pupa of Culicoides debilipalpis Lutz, 1913 are described, illustrated, and photomicrographed from material collected in tree-holes of Salix sp. in Entre Rios Province, Argentina by using binocular, phase-contrast, and scanning electron microscopy. Measurements of instars I–IV are also presented. The larva shows features typical to carnivorous-predatory larvae, as well as characters typical of larvae occurring in tree holes and clean water. Details on larval biology, habitat, and feeding behavior are given.

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Chen, Shicheng, Michael G. Kaufman, Michelle L. Korir, and Edward D. Walker. "Ingestibility, Digestibility, and Engineered Biological Control Potential of Flavobacteriumhibernum, Isolated from Larval Mosquito Habitats." Applied and Environmental Microbiology 80, no. 3 (2013): 1150–58. http://dx.doi.org/10.1128/aem.03319-13.

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ABSTRACTFlavobacteriumhibernum, isolated from larval habitats of the eastern tree hole mosquito,A. triseriatus, remained suspended in the larval feeding zone much longer (8 days) than other bacteria. Autofluorescent protein markers were developed for the labeling ofF. hibernumwith a strong flavobacterial expression system. Green fluorescent protein (GFP)-taggedF. hibernumcells were quickly consumed by larval mosquitoes at an ingestion rate of 9.5 × 104/larva/h. The ingestedF. hibernumcells were observed mostly in the foregut and midgut and rarely in the hindgut, suggesting that cells were dige

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Xu, Jiajun, Zelin Feng, Jian Tang, et al. "Improved Random Forest for the Automatic Identification of Spodoptera frugiperda Larval Instar Stages." Agriculture 12, no. 11 (2022): 1919. http://dx.doi.org/10.3390/agriculture12111919.

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Spodoptera frugiperda (fall armyworm, FAW) is a global agriculture pest. Adults have a strong migratory ability and larvae feed on the host stalks, which pose a serious threat for maize and other crops. Identification and counting of different instar larvae in the fields is important for effective pest management and forecasting emergence and migration time of adults. Usually, the technicians identify the larval instars according to the larva morphological features with the naked eye or stereoscope in the lab. The manual identification method is complex, professional and inefficient. In order

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Webb, C. M. "Post-Larval Development of the Tellinacean Bivalves Abra Alba, Tellina Fabula and Donax Vittatus (Mollusca: Bivalvia), With Reference to the Late Larva." Journal of the Marine Biological Association of the United Kingdom 66, no. 3 (1986): 749–62. http://dx.doi.org/10.1017/s0025315400042338.

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The post-larval shell and hinge development of the bivalves Abra alba (Wood), Tellina fabula Gmelin and Donax vittatus (da Costa) from the recently metamorphosed size to a juvenile size of 1·2–1·4 mm shell length has been examined using scanning electron microscopy. Early post-larval development in the stages up to 1·0–1·2 mm size can involve considerable morphogenetic change and requires careful description with photographic developmental series. The form of the pediveliger larva is present in the early post-larval shell and confirms the identity of the larvae of A. alba and T. fabula. The ve

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Mulyana, Jeane Siswitasari, Achmad Farajallah, and Yusli Wardiatno. "Redescription of Larval Development in Cultured Pearl Oyster Pinctada maxima." ILMU KELAUTAN: Indonesian Journal of Marine Sciences 23, no. 2 (2018): 109. http://dx.doi.org/10.14710/ik.ijms.23.2.109-112.

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Larval development plays a major role in efficient pearl culture. The cultured larvae will be later used for recipient and donor oysters in cultured pearl production. Larval developmental stage of silver lip pearl oyster Pinctada maxima has been reported by several studies. Those studies used female and male oyster parents directly taken from natural habitat.This study aimed to redescribe larval development of P. maxima from commercial pearl oyster culture farm in Indonesia. Larval development of this species whose parents are originated from selected groups in the pearl culture farm has not b

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Widiastuti, Zeny, Fahruddin Fahruddin, and I. Gusti Ngurah Permana. "PENGARUH PENGAYAAN Artemia sp. DENGAN SUMBER DHA YANG BERBEDA TERHADAP SINTASAN LARVA LOBSTER PASIR (Panulirus homarus)." Media Akuakultur 16, no. 1 (2021): 21. http://dx.doi.org/10.15578/ma.16.1.2021.21-31.

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Kegiatan pembenihan lobster masih dikembangkan di Indonesia. Sintasan yang rendah dan pakan yang sesuai masih menjadi masalah utama dalam kegiatan pembenihan lobster. Artemia sebagai pakan utama diduga belum mencukupi kebutuhan nutrisi larva lobster. Upaya pemberian bahan pengaya sebagai alternatif untuk meningkatkan nutrisi diharapkan dapat meningkatkan sintasan larva lobster. Pemberian bahan pengaya yang mengandung asam lemak dokosa heksanoid acid (DHA) ke Artemia dianggap penting bagi pertumbuhan dan sintasan pada krustasea. Tujuan penelitian ini untuk mengetahui performa larva lobster berd

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AYÓN-PARENTE, MANUEL, and MICHEL E. HENDRICKX. "First zoeal stage of the hermit crab Enallopaguropsis guatemoci (Glassell, 1937) (Crustacea: Anomura: Paguroidea: Paguridea) obtained in the laboratory." Zootaxa 4227, no. 3 (2017): 359. http://dx.doi.org/10.11646/zootaxa.4227.3.4.

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The first larval stage of Enallopaguropsis guatemoci is described in detail and illustrated. The larva is compared with larvae known for other genera of Paguridae except Pagurus. A synthesis of all characters provided herein indicates that first larvae of E. guatemoci can be separated from all known pagurid larvae (except Pagurus) by the combination of the following characters: carapace with long dorsal carina, posterolateral spines absent; abdominal somites 3–5 with pair of moderately long spines; telson narrowly triangular, not forked; spine at antennal protopod as long as endopod.

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Bennett, P., and J. Vanstaden. "Gall Formation in Crofton Weed, Eupatorium adenophorum Spreng (syn Ageratina adenophora), by the Eupatorium Gall Fly Procecidochares utilis Stone (Diptera, Trypetidae)." Australian Journal of Botany 34, no. 4 (1986): 473. http://dx.doi.org/10.1071/bt9860473.

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Procecidochares utilis lays eggs on the stem apex of Eupatoriurn adenophorurn and on hatching the larvae tunnel into the stem. In response to the presence of the larvae a gall forms in the stem which may contain from 1 to 23 larvae. Callus tissue differentiates and divides to block the entry passages and seal the larvae in the stem. The normal development of the stem is halted and it swells as the pith cells continue to divide and become gall parenchyma. A layer of highly meristematic nutritive tissue develops around the larval cavity on which the growing larvae feed. New vascular tissue diffe

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Winch, Judith M., and J. Riley. "Studies on the behaviour, and development in fish, ofSubtriquetra subtriquetra: a uniquely free-living pentastomid larva from a crocodilian." Parasitology 93, no. 1 (1986): 81–98. http://dx.doi.org/10.1017/s0031182000049842.

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SUMMARYThe primary larva of the porocephalid pentastomidSubtriquetra subtriquetra, which infects the nasopharynx ofCaiman sclerops, is uniquely free-living. Eggs hatch within the nasal passages and the emergent larvae can remain infective to the fish intermediate host for 4–5 days. During this period larvae exhibit very stereotyped behaviour, alternating between a characteristic stationary ‘fishing’ posture and very brief periods of movement. Larval activity increases significantly at 3 days, probably effecting dispersal to a more favourable site for host invasion. Host location is passive and

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