Journal articles: 'Catfishes Catfishes'

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Fitrawati, Rahmi AM, Muhamad Musbah, Muliadin Muliadin, Roni Hermawan, Renol Renol, and Mohammad Akbar. "PENGARUH KONSENTRASI PROTEIN IKAN LELE TERHADAP KANDUNGAN KIMIA DAN ORGANOLEPTIK KERUPUK IKAN." Jurnal Pengolahan Pangan 3, no. 1 (June 30, 2018): 28–31. http://dx.doi.org/10.31970/pangan.v3i1.10.

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Catfish is one of potential fisheries products in Central Sulawesi, but this fact is not in line with community consumption level. Catfishes contain protein and fatty acid which are good for health. The use of catfishes as fish chips become one of the way out to increase the community consumption level. This research aims at knowing the effect of catfishes protein concentration toward chemical content (water content, ash content) and organoleptics. The research result shows that the treatment of catfishes protein concentration is unsignifficantly effect the water and ash content, besides the result of hedonic test shows that the concentration signifficantly effect the taste, the smell and the texture of catfish chips but unsignifficanly effect the colour of it. The treatment by adding 200 g of catfish was being the panels’ most favorite treatment with a score of 4.5 or with the rounding 5 indicated as favored.

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Stolbunov, I. A., V. A. Gusakov, Tran Duc Dien, and Nguyen Thi Hai Thanh. "Food Spectrum, Trophic and Length-Weight Characteristics of Nonindigenous Suckermouth Armored Catfishes Pterygoplichthys spp. (Loricariidae) in Vietnam." Inland Water Biology 14, no. 5 (September 2021): 597–605. http://dx.doi.org/10.1134/s1995082921050163.

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Abstract The food spectrum and trophic and length–weight characteristics of an invasive species, South American suckermouth armored catfishes Pterygoplichthys spp. (Loricariidae), from lotic and lentic inland waters of Vietnam have been studied. It is found that the diet of suckermouth armored catfishes consists of plant and animal food, as well as organic detritus. According to the predominant type and pattern of feeding, suckermouth armored catfishes can be classified as detritivore gatherers (janitor). Some specimens of catfish with a high consumption of animal food have been identified. It is noted that invasive suckermouth armored catfishes can be a significant food competitor for aboriginal fish species; detritivores; and, possibly, benthophages in the lotic and lentic inland waters of Vietnam.

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Skelton, Paul. "Catfishes." African Journal of Aquatic Science 30, no. 1 (January 2005): 97–100. http://dx.doi.org/10.2989/16085910509503842.

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Diogo, Rui, Pierre Vandewalle, and Michel Chardon. "On the osteology and myology of the cephalic region and pectoral girdle of Heteropneustes fossilis (Siluriformes: Heteropneustidae), with comments on the phylogenetic relationships between Heteropneustes and the clariid catfishes." Animal Biology 53, no. 4 (2003): 379–96. http://dx.doi.org/10.1163/157075603322556283.

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AbstractThe osteological and myological structures of the cephalic region and pectoral girdle of the Asiatic catfish Heteropneustes fossilis are described and compared with those of several other catfishes, as the foundation for an analysis on the phylogenetic relationships of the genus Heteropneustes. Our observation and comparisons support a close relationship between Heteropneustes and the clariid catfishes. More specifically, the present study supports De Pinna's 1993 study, according to which Horaglanis and Uegitglanis, two genera commonly included in the family Clariidae, are the successive sister-groups of a monophyletic clade composed by the genus Heteropneustes and the remaining clariid genera.

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Isinkaye, M. O., F. S. Ajilu, S. B. Ibikunle, and O. S. Ajayi. "COMMITTED EFFECTIVE DOSE FROM NATURAL RADIONUCLIDES IN FARM-RAISED AND WILD CATFISH IN IBADAN, NIGERIA." Radiation Protection Dosimetry 193, no. 1 (January 2021): 1–7. http://dx.doi.org/10.1093/rpd/ncab011.

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Abstract There is extensive contamination of the aquatic environment when rivers and streams flow through areas of high human activities such as industrial cities and major towns. These contaminations may include enhanced background levels of naturally occurring radioactive materials resulting from rapid urbanization and other human activities. The natural radionuclides (40K, 238U (226Ra) and 232Th (228Ra)) contents of farm-raised and wild catfish in five fish farms and three major rivers within Ibadan metropolis have been studied using gamma spectrometry. The results indicate that the average committed effective doses from the ingestion of the two sets of catfishes are 104 ± 37 and 104 ± 32 μSv/y for farm-raised and wild catfish, respectively. It can be concluded that the consumption of the catfishes poses no immediate radiological hazards to the population of the study area.

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Diogo, Rui, and Roger Bills. "Osteology and myology of the cephalic region and pectoral girdle of the South African catfish Austroglanis gilli, with comments on the autapomorphies and phylogenetic relationships of the Austroglanididae (Teleostei: Siluriformes)." Animal Biology 56, no. 1 (2006): 39–62. http://dx.doi.org/10.1163/157075606775904740.

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AbstractThe cephalic and pectoral girdle structures of the South African catfish Austroglanis gilli are described and compared with those of other catfishes, either studied by us or described in the literature, as the foundation for a discussion on Austroglanididae autapomorphies, and also on the phylogenetic relationships between the austroglanidids and the other catfishes. Our observations, comparisons, and bibliographical overview revealed only two Austroglanidae autapomorphies, namely: 1) the peculiarly shaped, posteriorly bifurcated sesamoid bone 1 of the suspensorium; and 2) the markedly broad fourth basibranchial. Another feature, the marked lateral bifurcation of the anterodorsolateral laminar projection of the sphenotic bone, may eventually constitute an additional austroglanidid autapomorphy, but, perhaps more reasonably, be a synapomorphic feature to support a close relationship between A. gilli and A. barnardi. With respect to the phylogenetic position of the Austroglanididae within the Siluriformes, these fishes seem to be closely related to the ictalurid and the cranoglanidid, and particularly to the ariid and the claroteid catfishes.

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Begum, Rowshan Ara, Dilshad Tamanna Rahman, Md Abdul Rashid, Md Shamimul Alam, and Reza Md Shahjahan. "Comparison of Esterase Isozyme Variability in Some Selected Tissues of the Asian and African Catfishes (Siluriformes: Clariidae)." Bangladesh Journal of Zoology 40, no. 1 (December 9, 2012): 43–50. http://dx.doi.org/10.3329/bjz.v40i1.12893.

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Variation in esterase isozymes expression of 19 different tissues of the Asian catfish (Clarias batrachus) and African catfish (C. gariepinus) was studied. These tissues were: liver, anterior muscle, mid muscle, tail muscle (ventral region), tail muscle (tip region), buccal muscle, stomach, foregut, midgut, hindgut, kidney, gill, heart, eye (lens), eye (black portion), pelvic muscle, fore-, mid- and hind-brain. Maximum five esterase bands, viz. Est-11.83, Est-21.50, Est-31.15, Est-41.00 and Est- 50.17 were observed in the Asian catfish and four bands, viz. Est-21.50, Est-31.15, Est-41.00 and Est-50.17 in the African catfishes. Tissue specific localization of the isozymes was observed in both Asian and African catfishes. Comparatively higher esterase activity was found in digestive tissues. Higher number of esterase bands was found in C. batrachus which seems to be an indication of its greater allelic variation in esterases than those in the C. gariepinus. DOI: http://dx.doi.org/10.3329/bjz.v40i1.12893 Bangladesh J. Zool. 40(1): 43-50, 2012

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Azpelicueta, María de las Mercedes, Alberto Luis Cione, Mario Alberto Cozzuol, and Juan Marcos Mirande. "Kooiichthys jono n. gen. n. sp., a primitive catfish (Teleostei, Siluriformes) from the marine Miocene of southern South America." Journal of Paleontology 89, no. 5 (September 2015): 791–801. http://dx.doi.org/10.1017/jpa.2015.52.

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AbstractA specimen of a remarkable new catfish genus and species was collected in middle/late Miocene marine beds of the Puerto Madryn Formation at the base of the marine cliff of the sea lion colony area near Puerto Pirámide, southern coast of Península Valdés, northeastern Patagonia, Argentina. Siluriforms (catfishes) constitute a most important monophyletic ostariophysan group of mainly freshwater fishes that occurs in almost all continents but it is especially diverse in South America. Catfishes are presently distributed in tropical to temperate areas and a small number of species are marine or amphibiotic. The new catfish shows many primitive features for catfishes in the maxilla, autopalatine, hyal elements, and Weberian apparatus. The genus is clearly distinguished by four autapomorphies: sand clock–shaped autopalatine, posterior limb of autopalatine widening strongly, post-articular arm of autopalatine longer, and a metapterygoid longer than broad. One tree was obtained both under equal and implied weighting with the following topology: a basal polytomy in the Siluriformes formed by Diplomystidae, Bachmanniidae, Kooiichthys and the Siluroidei. The new species appears to have been a marine or amphibiotic taxon: it was collected in beds considered to represent the Maximum Flooding Horizon of the transgression that deposited the Puerto Madryn Formation. The coast at this moment was at approximately 90 km to the west. According to faunistic evidence, the sea was warm temperate.

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Umaru, I. L., T. C. Okoh, and R. C. Ishiwu. "PROFITABILITY OF CATFISH PRODUCTION IN ENUGU METROPOLIS, ENUGU STATE, NIGERIA." Open Journal of Agricultural Science (ISSN: 2734-214X) 2, no. 2 (July 26, 2021): 1–11. http://dx.doi.org/10.52417/ojas.v2i2.229.

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The study was carried out in Enugu Metropolis, Enugu State, to investigate the profitability of catfish production. Specifically, the study described the socioeconomic characteristics of catfish farmers; estimated cost and returns of catfish production and identified constraints to catfish production in the study area. Data were collected from 120 respondents who were purposively chosen in the three Local Government Areas that made up Enugu Metropolis, using questionnaires. The data were analyzed using descriptive statistics, the Gross margin model and a 3-point Likert type rating scale. The study showed that 61.7% of the respondents were males with a majority (95.0%) below the age of 45 years. The study revealed that from every 1000 fingerlings that were stocked, 980 catfishes were harvested with an average weight of 1.5kg in a period of 6 months. The catfish farmers expended an average total cost of N575,168 and made an average total revenue of N1,176,000. This indicates a survival rate of 98% of catfishes that was reared in the area. The gross margin analysis revealed a gross margin of N652,700.00 with a net farm income of N600,832.00 for every 1000 catfishes that were raised to maturity at1kg. For every 1N invested in the business, there was a return of N1.25 (RCI). The study concludes that catfish production in the study area was dominated by males in their active age who were well educated. Catfish production was very profitable in the study area. The constraints facing the farmers were the high cost of feeds, insufficient capital and poor extension services. These farmers could handle large scale production if capital is made available to them which will also allow them to make more profits and become employers of labour. The study recommends that educated unemployed youths in the area should be encouraged to go into catfish farming since the business is very profitable. Soft loans should be made available by credit agencies for the catfish farmers in the area to enable them to increase their scale of operation and the farmers should form and manage functional cooperative societies to enable them to achieve economies of scale.

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Shibuya, Akemi, and Jansen Zuanon. "Catfishes as prey items of Potamotrygonid stingrays in the Solimões and Negro rivers, Brazilian Amazon." Biota Neotropica 13, no. 1 (March 2013): 376–79. http://dx.doi.org/10.1590/s1676-06032013000100041.

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In spite of the fact that catfish have rarely been reported as food items in the diets of freshwater stingrays, they are commonly observed in the stomach contents of species inhabiting the Solimões and Negro rivers in the Brazilian Amazon. The stomach contents of six rays from the Solimões River and 64 from the Negro River were analyzed, and catfishes (distributed among the families Callichthyidae, Cetopsidae, Doradidae and Loricariidae) were found in the stomach contents of four and 10 of these rays, respectively, comprising a frequency of occurrence of 20%. These data indicate a relevant participation of catfishes in the diets of potamotrygonid rays in the Amazon, and may reflect the regional diversity and abundance of Siluriformes in the region.

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Amin, Muhammad, Mohammad Shoaib, Ghulam Nabi, Naveed Ahmed, and Muhammad Kifayatullah. "A Comprehensive Review on Fishery Biology of Catfishes." Journal of Biology and Life Science 7, no. 1 (October 13, 2015): 1. http://dx.doi.org/10.5296/jbls.v7i1.8421.

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Cat fish exploit a large diversity of both plant and animal protein, and adapt harsh environmental conditions as they have the ability to take atmospheric oxygen. Marine catfish tolerate a broad range of salinities between Open Ocean and fresh water. The entire catfishes have soft as well as scaleless body, are greatly appreciated by consumers and maintain healthy in both fresh and dried condition. In this review article various aspects of cat fish has been discussed.

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Alam, Mohammad Shamimul, Hawa Jahan, Rowshan Ara Begum, and Reza M. Shahjahan. "Differentiation Of Clarias Batrachus, C. Gariepinus And Heteropneustes Fossilis By Pcr-Sequencing Of Mitochondrial 16s Rrna Gene." Journal of the Asiatic Society of Bangladesh, Science 41, no. 1 (June 16, 2015): 51–58. http://dx.doi.org/10.3329/jasbs.v41i1.46190.

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Heteropneustesfossilis, Clariasbatrachus and C. gariepinus are three major catfishes ofecological and economic importance. Identification of these fish species becomes aproblem when the usual external morphological features of the fish are lost or removed,such as in canned fish. Also, newly hatched fish larva is often difficult to identify. PCRsequencingprovides accurate alternative means of identification of individuals at specieslevel. So, 16S rRNA genes of three locally collected catfishes were sequenced after PCRamplification and compared with the same gene sequences available from othergeographical regions. Multiple sequence alignment of the 16S rRNA gene fragments ofthe catfish species has revealed polymorphic sites which can be used to differentiate thesethree species from one another and will provide valuable insight in choosing appropriaterestriction enzymes for PCR-RFLP based identification in future. Asiat. Soc. Bangladesh, Sci. 41(1): 51-58, June 2015

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Gustiano, Rudhy. "Pangasiid Catfishes of Indonesia." Buletin Plasma Nutfah 15, no. 2 (October 10, 2016): 91. http://dx.doi.org/10.21082/blpn.v15n2.2009.p91-100.

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Pangasiidae are economically important riverine catfishes generally occurring in freshwater from the Indian subcontinent to the Indonesian Archipelago. Morphologically, they are recognized by a laterally compressed body, two pairs of barbels, a short dorsal fin with two spines, a well developed adipose fin, a long anal fin, and a strong pectoral spine. The systematics of this family are still poorly known. Consequently, the lack of this basic information is a great barrier in understanding the biology and hence the study of the aquaculture potential of species, the improvement of their seed production and growth performance. Objectives of the study are to present all species and genera of pangasiid catfishes of Indonesia including their distribution and detailed identification. AbstrakKelompok ikan pangasius atau pangasiidae merupakan jenis penting ikan &ldquo;catfish&rdquo; (bersungut) yang hidup di air tawar dan tersebar dari daratan India hingga kepulauan Indonesia. Secara umum ikan ini memiliki bentuk tubuh memanjang dan ramping, dua pasang sungut, sirip punggung yang relatif pendek dengan dua duri keras, sirip lunak tambahan yang berkembang sempurna sebagai pengontrol renang, dan tulang sirip dada yang kuat. Secara sistematik, kelompok ikan pangasius masih belum dikenal secara baik. Oleh karena itu, kurangnya informasi dasar yang dimiliki pada kelompok ikan ini merupakan hambatan utama untuk memahami sifat-sifat biologinya, pengembangan budidayanya, produksi benih, dan perbaikan keragaannya. Tujuan dari studi yang dilakukan adalah untuk menyajikan semua spesies dan genus ikan pangasius yang ada di Indonesia mencakup distribusi, sebaran, dan kunci identifikasinya secara detail.

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ALVES, PHILIPPE V., ALAIN DE CHAMBRIER, JOSÉ L. LUQUE, and TOMÁŠ SCHOLZ. "Towards a robust systematic baseline of Neotropical fish tapeworms (Cestoda: Proteocephalidae): amended diagnoses of two genera from the redtail catfish, Phractocephalus hemioliopterus." Zootaxa 4370, no. 4 (January 12, 2018): 363. http://dx.doi.org/10.11646/zootaxa.4370.4.3.

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Species of two monotypic genera, Ephedrocephalus Diesing, 1850 and Zygobothrium Diesing, 1850 (Cestoda: Proteocephalidae), parasites of one of the most basal members of the catfish family Pimelodidae, the redtail catfish, Phractocephalus hemioliopterus, in the Neotropical Region, are redescribed based on the evaluation of type specimens and newly collected material. Generic diagnoses are amended to provide a robust baseline for the future re-arrangement of the classification of proteocephalid cestodes. Ephedrocephalus is typified by the medullary position of the ovary and uterus, the cortical distribution of vitelline follicles (dispersed throughout almost the entire ventral cortex) and the testes in one dorsal field. Zygobothrium is primarily characterized by its possession of a robust scolex bearing four uniloculate suckers with two openings each and by the tetralobed velum (laciniations) on every proglottid (two on the ventral and two on the dorsal side). The redtail catfish is the definitive host of as many as seven species of proteocephalid cestodes, which, however, do not represent a monophyletic group. Some species, including Z. megacephalum, are among the earliest diverged parasites of Neotropical catfishes, being closely related to African and North American proteocephalids from catfishes, whereas others such as E. microcephalus belong to more recently diverged taxa with uncertain interrelations. Unlike most proteocephalids of the redtail catfish, which almost always infect the anterior parts of the host intestine, E. microcephalus and Z. megacephalum occur exclusively in its posterior third. A key to the identification of the proteocephalid species parasitizing P. hemioliopterus is also presented.

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Garrone Neto, Domingos, and Virgínia Sanches Uieda. "Ingestion of catfish by freshwater stingray: possible mistake or inexperience." Biota Neotropica 9, no. 4 (December 2009): 265–67. http://dx.doi.org/10.1590/s1676-06032009000400029.

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We report an individual of the freshwater stingray Potamotrygon falkneri caught with a decomposing catfish, Pimelodella gracilis, stuck in its oral cavity. The ingestion of catfishes by stingrays is possibly rendered difficult or hazardous due to the serrated spines on the dorsal and pectoral fins of this prey type. There are at least two possible explanations for the rotting catfish we found stuck in the mouth of a potamotrygonid ray: mistake or inexperience of the analyzed specimen. Both possibilities may be due to the fact that the ray was a young individual.

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LARDIZABAL, CLAUDIA C., EDIS M. BENITEZ, and WILFREDO A. MATAMOROS. "Record of the Non-native Suckermouth armored catfish hybrid Pterygoplichthys pardalis (Castelnau,1985) x Pterygoplichtys disjunctivus (Weber, 1991) (Siluriformes: Loricariidae) in Honduras." Zootaxa 4778, no. 3 (May 15, 2020): 593–99. http://dx.doi.org/10.11646/zootaxa.4778.3.10.

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Loricariidae is the largest catfish family, with over 1000 species and 80 genera (Fricke & Eschmeyer, 2019). Sailfin catfishes of the genus Pterygoplichthys are armored catfishes, native to temperate and tropical areas of South America, especially the Amazon (Wakida-Kusunoki & del Angel, 2011). Two species of this genus (Pterygoplichthys pardalis (Castelanu, 1855) and P. disjunctivus (Weber, 1991)) are naturally distributed in South America along the lower, middle and upper basin of the entire Amazon River (Wakida-Kusunoki & del Angel, 2008). These armored catfishes, typified by the presence of ossified plates through the body, are considered very successful invaders of rivers and lakes outside their natural range. Their invasion success has been attributed to their morphology, behavior and life history. For instance, their ability to withstand droughts and cold weather by using burrows in river and lake banks they can survive in the moist habitat even when water levels decrease below the opening of the burrows, these survival characteristics of harsh conditions enable them to thrive in native and non-native grounds (Burgess 1989; Hoover & Killgore 2004; Nico & Martin 2001; Sandoval-Huerta et al. 2012). Furthermore, their rapid growth during their first years of life, their reproductive traits such as an extended reproductive period, high egg yield (Rueda-Jasso et al. 2013), and the capability of achieving reproductive maturity at smaller size (Wei et al. 2017) allow introduced populations to become abundant in a short period of time.

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Pusey, Bradley J., Timothy D. Jardine, Stuart E. Bunn, and Michael M. Douglas. "Sea catfishes (Ariidae) feeding on freshwater floodplains of northern Australia." Marine and Freshwater Research 71, no. 12 (2020): 1628. http://dx.doi.org/10.1071/mf20012.

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Flooding of the terminal floodplains of northern Australian rivers provides a greatly expanded, productive habitat accessed by both freshwater and estuarine fishes. This study aimed to determine the extent to which sea catfishes (Ariidae) make use of floodplains and the reasons for doing so (i.e. spawning, feeding). Nine species were collected from floodplains and adjacent distributaries of the Mitchell and Flinders rivers; floodplain use was largely restricted to freshwater species. Evidence of prior wet season spawning was recorded for some species, and mesenteric lipid deposits indicated that fish were in good condition. However, little evidence of spawning on floodplains was found. Stomach content analysis and stable isotope analysis indicated dietary partitioning, particularly between freshwater and estuarine species, but also within freshwater species, and indicated that some species were responsive to variations in food availability. Isotope analyses suggest extensive movement between freshwater, estuarine and marine habitats at different life history stages for the catfish assemblage studied. Terminal floodplains of northern Australian rivers provide important temporary habitat for adult sea catfishes to feed upon, but do not appear to be used as spawning grounds.

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Triyatmo, Bambang. "ZEOLIT MEMPERTAHANKAN KUALITAS AIR DAN MENINGKATKAN PERTUMBUHAN LELE DUMBO (Clariasgariepinus)." Jurnal Perikanan Universitas Gadjah Mada 5, no. 1 (January 28, 2003): 1. http://dx.doi.org/10.22146/jfs.8962.

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The objectives of this research were to know the effects of zeolite on the water quality and the growth of catfish. Catfishes were cultured in fiberglass containers (±24 l) with 5-10% of water exchange/container/day, for 3 months. The stocking density was 8 fishes/container (3 fishes/l water). Zeolite was added at 0, 125, 250, 500 mg/l/month.Result of this experiment indicated that zeolite at 125, 250, 500, mg/l/month decreased free CO2, alkalinity and NH3 of water during 3 months culture of catfish. The body weight increasment of catfish cultured in treated water with zeolit at 125, 250, 500 mg/l/month were 188, 195, and 222 g, respectively, which were higher than that of catfish cultured in untreated water.

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Gatts, Pedro V., Marcos A. L. Franco, Marcelo G. Almeida, Ilana R. Zalmon, Ana Paula M. Di Beneditto, Paulo A. S. Costa, and Carlos E. de Rezende. "The trophic ecology of marine catfishes in south-eastern Brazil." Journal of the Marine Biological Association of the United Kingdom 100, no. 1 (January 13, 2020): 133–42. http://dx.doi.org/10.1017/s0025315419001164.

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AbstractThe stable isotope ratios of carbon (δ13C) and nitrogen (δ15N) and total mercury concentrations (THg) of the three marine catfish species Aspistor luniscutis, Bagre bagre and Genidens genidens were evaluated to understand their trophic relationship in northern Rio de Janeiro state, south-eastern Brazil. The δ13C was similar among the three marine catfishes, whereas δ15N was similar in A. luniscutis and B. bagre and lower in G. genidens. THg was higher in G. genidens and lower in B. bagre. The greater assimilation of Sciaenidae fishes and squids by A. luniscutis and B. bagre resulted in smaller isotopic niche areas and trophic diversity but higher isotopic niche overlap, trophic redundancy and evenness. For G. genidens, the similar assimilation of all prey items resulted in the broadest isotopic niche among the marine catfishes. The higher mercury content in G. genidens is consistent with an increased important contribution of prey with a higher Hg burden. The bioaccumulation process was indicated by significant correlations of δ15N and THg with total length and total mass. Additionally, a significant correlation between THg and δ15N reflected the biomagnification process through the food web.

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Gustiano, Rudhy, and Laurent Pouyaud. "Diversity of Pangasiid Catfishes From Sumatra." Buletin Plasma Nutfah 12, no. 2 (October 6, 2016): 83. http://dx.doi.org/10.21082/blpn.v12n2.2006.p83-88.

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One of the utmost importance catfish group for fisheries and aquaculture in Southeast Asia is pangasiids. The main constrain to cultivate wild species and optimize the production of cultured species was due to the poorly documented of the genetic resources. In the current study, it presents the diversity of pangasiids catfishes from Sumatra. Nine hundreds and ninety nine specimens formed the core of the material examined during this study. On each specimen, 35 point to point measurement, covering the possible variation of the body conformation were taken using dial calipers. Data were subjected to principal component analysis. Data analysis consisted in characterizing groups from scatter plots between pairs of structuring characters for subsequent use in generic identifycation keys. Four genera with seven species exist in four main rivers, Indragiri; Batang Hari; Musi; Way Rarem, in Sumatra. They are Helicophagus typus, H. Waandersii, Pteropangasius micronemus, Pangasius polyuranodon, P kunyit, P. djamba,l and P. nasutus. The diagnosis of the species, identification key, distribution and ecology were given. AbstrakSalah satu group catfish (ikan berkumis) penting untuk perikanan tangkap dan budi daya di Asia Tenggara adalah famili Pangasiidae. Kendala utama untuk membudidayakan spesies dari alam dan meningkatkan produksi ikan budi daya adalah kurangnya informasi tentang plasma nutfah. Studi yang dilakukan menyajikan keragaman pangasius catfish dari Sumatra. Sejumlah 999 spesimen digunakan sebagai bahan uji. Pada setiap spesimen dilakukan 35 pengukuran menggunakan jangka sorong untuk menggambarkan keragaman bentuk tubuh. Data diuji dengan principal component analysis. Analisis data terdiri dari karakterisasi group menggunakan sebaran data antara pasangan-pasangan karakter pengukuran untuk menghasilkan kunci identifikasi. Empat genera dengan 7 spesies didapatkan dari 4 sungai utama (Indragiri, Batang Hari, Musi, dan Way Rarem) di Sumatra. Spesies-spesies tersebut adalah Helicophagus typus, H. waandersii, Pteropangasius micronemus, Pangasius polyuranodon, P. kunyit, P. djambal, dan P. nasutus. Diagnosis dari spesies-spesies tersebut, kunci identifikasi, distribusi, dan ekologi dipaparkan dalam makalah ini.

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MacCormack, T. J., R. S. McKinley, R. Roubach, V. M. F. Almeida-Val, A. L. Val, and W. R. Driedzic. "Changes in ventilation, metabolism, and behaviour, but not bradycardia, contribute to hypoxia survival in two species of Amazonian armoured catfish." Canadian Journal of Zoology 81, no. 2 (February 1, 2003): 272–80. http://dx.doi.org/10.1139/z03-003.

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Amazonian armoured catfishes exhibit substantial cardiac hypoxia tolerance, but little is known concerning organismal cardiorespiratory, metabolic, and behavioural responses to low oxygen levels. This study assessed the general mechanisms used by two species of armoured catfish, Glyptoperichthyes gibbceps and Liposarcus pardalis, to survive the frequent periods of hypoxia encountered in the Amazon River. The gill ventilation rate (fv) and heart rate (fh) were studied under controlled hypoxia in aquaria and under natural hypoxia in a simulated pond. Glyptoperichthyes gibbceps were fitted with radiotelemetry tags and held in field cages to study their habits of depth selection and air breathing. When denied aerial respiration under hypoxia in aquaria, G. gibbceps increased fv, but neither they nor L. pardalis exhibited alterations in fh. An increase in fvwas initially observed in G. gibbceps during pond hypoxia before aerial respiration was initiated and fvdeclined. Glyptoperichthyes gibbceps were hyperglycaemic under normoxia, and extremely large increases in plasma glucose and lactate concentrations were observed under hypoxia. Field studies confirmed their nocturnal behaviour and showed that air breathing increased at night, regardless of dissolved oxygen concentration. Our results show that armoured catfishes preferentially up-regulate fvand anaerobic metabolism and exhibit no bradycardia during hypoxia.

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Wilson, Riobert P., and Yann Moreau. "Nutrient requirements of catfishes (Siluroidei)." Aquatic Living Resources 9 (November 1996): 103–11. http://dx.doi.org/10.1051/alr:1996045.

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23

Diogo, Rui. "Phylogeny, origin and biogeography of catfishes: support for a Pangean origin of 'modern teleosts' and reexamination of some Mesozoic Pangean connections between the Gondwanan and Laurasian supercontinents." Animal Biology 54, no. 4 (2004): 331–51. http://dx.doi.org/10.1163/1570756042729546.

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AbstractThe wide geographical distribution of the mainly freshwater catfishes has long intrigued the scientific community. This work provides a new insight into the phylogeny and the puzzling biogeographical distribution of catfishes. The important implications for teleost biogeography and plate tectonics are discussed. The results of the author's cladistic study on catfish higher level phylogeny, together with a revision of the data available concerning different fields such as palaeobiogeography, phylogeny, ecology and molecular biology, as well as the growing evidence supporting the existence of some remaining Pangean connections between Gondwana and Laurasia extending into the Early Cretaceous, strongly support a rather complex biogeographic scenario with multiple pre-drift and post-drift continental dispersions, vicariances, and, possibly, some marine migrations. According to this scenario: 1) catfishes originated in the South American region at a moment when there were still some remaining Pangean connections between Gondwana and Laurasia; 2) after this, there was a relatively rapid pre-drift continental dispersion of several, but not all, main groups of Siluriformes from the South-American region to Africa and other Gondwanan areas, with some of those groups succeeding in radiating ulteriorly via the remaining continental Pangean connections between Gondwana and Laurasia to this latter super-continent; 3) the final separation between Laurasia and Gondwana, and posteriorly between the regions constituting each of these super-continents, contributed to important vicariant events; 4) this scenario was still further complicated by numerous events such as the collision of India with Asia, the re-establishment of certain land connections between previously separated continents (e.g., between the Americas), and eventually also by some marine migrations, thus explaining the highly complex biogeographical distribution of the Siluriformes. In sustaining such a scenario, this work thus supports that, contrary to what is often accepted, some groups of 'modern teleosts' did have a Pangean origin.

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Orfinger, Alexander B., Quan T. Lai, and Ryan M. Chabot. "Effects of Nonnative Fishes on Commercial Seine Fisheries: Evidence from a Long-Term Data Set." Water 11, no. 6 (June 4, 2019): 1165. http://dx.doi.org/10.3390/w11061165.

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Dozens of introduced exotic freshwater fish species inhabit the state of Florida. These nonnative fishes interact with freshwater commercial fisheries in a variety of ways, influencing catch abundance, composition, and revenue. Using a 22-year data set collected from a commercial haul seine fishery, we aimed to explore the dynamics of yield and revenue in relation to nonnative fishes, with emphasis on the suckermouth armored catfishes (Pterygoplichthys spp.). Using profit index metrics and the inverse Simpson’s diversity index, we found that non-native tilapia (Oreochromis spp.) and brown hoplo (Hoplosternum littorale) provided economic benefits while suckermouth armored catfishes seemed to disrupt catch consistency and lower profit index values. To reduce the negative impacts of the suckermouth armored catfishes and subsequently exert pressure on their population, we suggest marketing these edible fishes for human and/or animal consumption.

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Moldowan, Patrick D., Matthew G. Keevil, Steven Kell, Ronald J. Brooks, and Jacqueline D. Litzgus. "Anti-predator defenses of Brown Bullheads (Ameiurus nebulosus) and interactions with Snapping Turtles (Chelydra serpentina)." Canadian Field-Naturalist 129, no. 2 (August 5, 2015): 189. http://dx.doi.org/10.22621/cfn.v129i2.1701.

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Ictalurid catfishes have sharp spines on their dorsal and pectoral fins that can be hazardous to predators. The pectoral spines may lock in an abducted position, effectively increasing body size and preventing ingestion by gape-limited predators. Further, sharp spines may injure predators or increase prey handling time, affording catfish opportunities for escape. As part of a long-term mark–recapture study of turtle ecology in Algonquin Provincial Park, Ontario, Canada, we documented the presence of Brown Bullheads, Ameiurus nebulosus, in the diet of Snapping Turtles, Chelydra serpentina. Here, we report on injuries inflicted by the pectoral spines of bullheads on Snapping Turtles during predator–prey interactions and provide a brief literature review of the functional significance and potential dangers of catfish pectoral spines to predators.

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FERRARIS, CARL J. "Checklist of catfishes, recent and fossil (Osteichthyes: Siluriformes), and catalogue of siluriform primary types." Zootaxa 1418, no. 1 (March 8, 2007): 1–628. http://dx.doi.org/10.11646/zootaxa.1418.1.1.

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A checklist of Recent and fossil catfishes (Order Siluriformes) is presented, summarizing taxonomic literature published through 2005. From 4624 nominal species group names and 810 genus group names, 3093 species are recognized as valid, and are distributed among 478 genera and 36 families. Distributional summaries are provided for each species, and nomenclatural synonymies, including relevant information on all name-bearing types, are included for all taxa. One new name is proposed herein: Clariallabes teugelsi, as a replacement for Clarias (Allabenchelys) dumerili longibarbis David & Poll, 1937, which is preoccupied by Clarias longibarbis Worthington, 1933, but has been treated as a valid species of Clariallabes by Teugels. Acrochordonichthys melanogaster Bleeker, 1854, is designated as type species of Acrochordonichthys Bleeker, 1857, inasmuch as no earlier valid designation has been found. A new genus Pseudobagarius, is proposed for the “pseudobagarius group” of species formerly placed in Akysis. The status of 228 species group names remains unresolved and 31 names based on otoliths ascribed to catfishes are listed but not placed into the checklist. The current emphasis given to catfish taxonomy at present is likely to result in a dramatic increase in the total number of valid taxa as well as major changes in the membership of some of the higher level taxa recognized here.

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Orlov, A. A., V. D. Baron, and A. S. Golubtsov. "Electrogenesis in two african upside-down catfishes, Synodontis sorex and S. batensoda (Mochokidae, Siluriformes)." Доклады Академии наук 487, no. 6 (September 10, 2019): 711–14. http://dx.doi.org/10.31857/s0869-56524876711-714.

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Weak electric discharges generated by the two species of African upside-down catfishes, Synodontis sorex and S. batensoda, are described. In both species two types of discharges were recorded in the course of aggressive-defense interactions in the pairs of individuals: short simple biphasic and longer (duration > 20 ms) discharges with more complex waveform. The discharges of the latter type seem to result from a temporal summation (with various latency) of simple discharges. It is suggested that formation of the long quasimonopolar discharges enhances the coincidence of frequency spectrum of the catfish discharges with maximum sensitivity range of their ampullary electroreceptors.

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Vlasov, V., and I. Kulkova. "The cultivation of sharptooth catfish (Clarias gariepinus burchell) when the use of compound feed with different protein level." Glavnyj zootehnik (Head of Animal Breeding), no. 4 (April 1, 2020): 58–67. http://dx.doi.org/10.33920/sel-03-2004-08.

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It has been found as a result of the research that sharptooth catfishes grown on a highprotein diet (the 2nd variant) had a higher growth rate compared to fish that consumed low-protein, but cheap feed (the 1st variant). The average daily gains of fish in the 2nd variant of the experiment corresponded to 6,1 g/day, which was 3,4 g higher compared to the herdmates of the 1st variant. During the experiment period (60 days) the individual weight of catfishes that consumed low-protein compound feed has been increased by 160 g while fish have been grown on high-protein compound feed added 364 g, which was 2,3 times more. In the end the higher yield of fish products per unit of water area has been obtained in the 2nd variant of the experiment 271,2 kg/m[sup]3[/sup] against 118,4 kg/m[sup]3[/sup] in the 1st variant. However, economic analysis has shown that the use of expensive high-protein feed does not give a significant effect. The additional profit in the 1st variant was only 12 %. Catfishes have been grown on high-protein compound feed had the best conformation and technological indicators. They differed from their herdmates from the other variant with higher indicators of edible body parts their body contained less internal fat. High growth and better physiological condition of catfishes that consumed higher-quality protein feed are confirmed by interior, hematological and biochemical indicators. Their blood had a higher concentration of protein, hemoglobin, and fewer white blood cells. In catfishes of the 1st variant the higher level of AST and ALT enzymes has been found in the blood serum, which indicates a low protein metabolism, increased urea synthesis and the high load of work of the liver.

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Carvalho, Thaís Isabela, Julia Klaczko, and Veronica Slobodian. "Pectoral-fin glands and delivery apparatus in the catfish genus Brachyrhamdia Myers, 1927 (Siluriformes: Heptapteridae)." Papéis Avulsos de Zoologia 61 (August 24, 2021): e20216174. http://dx.doi.org/10.11606/1807-0205/2021.61.74.

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The Siluriformes, popularly known as catfishes, are probably the vertebrate group with the highest diversity of venomous animals, even though only approximately a hundred venomous catfishes are reported to date. Venomous catfishes might present a delivery system apparatus, formed by an unbranched ray at the leading edge of pectoral and dorsal fins (spine), which can be stiffened and pungent, while venom glands can be present at the surface of such spines and/or the axillary region. This work investigated the presence, morphology and distribution of glands and pectoral-fin delivery apparatus in the heptapterid Brachyrhamdia genus. Pectoral-fin spine external morphology was compared across all valid species in the genus, histological sections of the pectoral-fin spine and axillary regions of B. heteropleura and B. marthae were produced, and dissections of the pectoral girdle region of the mentioned species were analyzed. The histological sections confirmed the presence of pectoral-fin glands at the surface of the pectoral-fin spine of Brachyrhamdia species, and cellular morphology indicates these glands are probably venomous. Also, we found a piriform gland at the axillary region, whose cell morphology is like the reported for other catfishes. However, we cannot currently confirm or deny axillary gland participation in the venom delivery apparatus. This work constitutes the first report of venom glands in Brachyrhamdia, and the first description of Heptapteridae axillary glands.

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Bhuyan, Gitalee, and Nirmalendu Saha. "Role of Free Amino Acids in Renal Tissue of Air-Breathing Catfish, Heteropneustes Fossilis Under-Desiccation Stress (Mud Dwelling)." Science & Technology Journal 6, no. 1 (January 1, 2018): 68–74. http://dx.doi.org/10.22232/stj.2018.06.01.09.

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The Indian air-breathing catfish, Heteropneustes fossilis faces various environmental constraints throughout the year leading to the problem of accumulation of toxic ammonia. Water restricted mud dwelling condition is a common environmental stress (desiccation stress) for catfishes in North Eastern India during winter. The fish is able to survive inside moist peat for months. In the present study the air breathing singhi catfish H. fossilis was kept inside mud peat for 30 days mimicking their normal habitat in winter and the changing pattern of free amino acid (FAAs) content was investigated in renal tissue. Under desiccation, a significant accumulation of ammonia and FAA, mainly glutamine, alanine, glycine, glutamate and serine have been observed in the renal tissue with approximately 2.56 and 1.56 fold increase. Thus, it appears that the Indian air-breathing catfish handle the ammonia toxicity by conversion of ammonia to some non-essential FAAs.

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Cione, Alberto L., and G. V. R. Prasad. "The oldest known catfish (Teleostei: Siluriformes) from Asia (India, Late Cretaceous)." Journal of Paleontology 76, no. 1 (January 2002): 190–93. http://dx.doi.org/10.1017/s0022336000017480.

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Siluriformes constitute an important monophyletic group of mainly freshwater fishes (Fink and Fink, 1996). Presently, there are about 35 families with over 2,000 species in all continents except Antarctica (Lundberg, 1993; Nelson, 1994); however, at least in the Eocene, they also inhabited Antarctica as well (Grande and Eastman, 1986). A small number of catfishes (most of the ariids and many of the plotosids) are marine and some species of other families can enter brackish waters (Nelson, 1994). Pre-Cenozoic catfishes are extremely rare outside of South America.

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32

Sugumar, Ramkumar, A. K. Jaiswar, Ranjith Lakshmanan, Sushant Chakraborty, G. B. Purushottama, Vinay Deshmukh, Vinod Kavungal, and Rani George. "An Assessment on Economic Impact of Growth Over Fishing of Commercially Important Marine Ariids Along Mumbai, Northwest Coast of India." Current World Environment 11, no. 2 (August 25, 2016): 531–36. http://dx.doi.org/10.12944/cwe.11.2.22.

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The economic assessment on juvenile landings of four dominant marine catfishes at New Ferry Wharf (NFW) landing centre, Mumbai, Northwest coast of India was carried out during January to December, 2013. The dominant catfishes viz. Nemapteryx caelata (19.7 %), Plicofollis dussumieri (21.5 %), P. tenuispinis (24.8 %) and Osteogeneiosus militaris (27.5 %) together contributing 93% of total marine catfish landings of the state. Among four species, the juvenile landings of N. caelata contribute maximum(93.17 %) followed by P. dussumieri (57.14 %), O. militaris (36.11 %) and P. tenuispinis (21.43 %) with the maximum landing during November to March . The bioeconomic model reveals that if juveniles are allowed to grow up to length at first maturity (Lm); an estimated total annual economic gain will be Rs. 13.15 crores with an estimated biomass gain of 1222 t per annum. The estimated total annual biomass is increased by 2.07 times with an increase in additional revenue by 3.7 times would have been realised. The results of present study suggest that sustainable harvest of these resources would have been yielded maximum economic return to the fishers. With the help of stakeholders participatory approach, management measures such as strict mesh size regulation, effort restriction on bottom trawl up to 50 m depth and awareness campign on catching juveniles and adult in particulat to the oral incubated male ariids, would have been implemented during November to March to avoid growth over fishing.

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ALVES, PHILIPPE V., ROMAN KUCHTA, and TOMÁŠ SCHOLZ. "Molecular data support monophyly of the recently erected Riggenbachiella (Cestoda: Proteocephalidae), parasites of Neotropical catfishes." Zootaxa 4706, no. 4 (December 11, 2019): 594–97. http://dx.doi.org/10.11646/zootaxa.4706.4.9.

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Proteocephalid tapeworms (Cestoda) are one of the dominant groups of intestinal parasites of Neotropical catfishes (Siluriformes), especially pimelodids (de Chambrier et al. 2015). The long and convoluted taxonomic history of species of Chambriella Rego, Chubb & Pavanelli, 1999 has been disentangled only recently by Alves et al. (2017). These authors erected a new genus, Riggenbachiella Alves, de Chambrier, Luque & Scholz, 2017, to accommodate R. amazonense Alves, de Chambrier, Luque & Scholz, 2017 (type-species) and R. paranaense (Pavanelli & Rego, 1989) (previously Chambriella paranaensis), parasites of pimelodid catfishes.

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34

Bruton, Michael N. "Alternative life-history strategies of catfishes." Aquatic Living Resources 9 (November 1996): 35–41. http://dx.doi.org/10.1051/alr:1996040.

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35

Teugels, G. G., R. Guyomard, and M. Legendre. "Enzymatic variation in African clariid catfishes." Journal of Fish Biology 40, no. 1 (January 1992): 87–96. http://dx.doi.org/10.1111/j.1095-8649.1992.tb02556.x.

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Webb, Amanda L., and Michael E. Smith. "Sound production in two loricariid catfishes." Journal of the Acoustical Society of America 120, no. 5 (November 2006): 3103. http://dx.doi.org/10.1121/1.4787556.

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Criscitiello, Michael F., Ralph Benedetto, Aurita Antao, Melanie R. Wilson, V. Gregory Chinchar, Norman W. Miller, L. William Clem, and T. J. McConnell. "β 2 -microglobulin of Ictalurid catfishes." Immunogenetics 48, no. 5 (September 16, 1998): 339–43. http://dx.doi.org/10.1007/s002510050441.

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38

Hariani, Dyah, Marhendra A. P. W, Aulanni Am, and Suprayitno E. "Profile of Catfish (Clarias sp) Oocyte Exposed by Laserpuncture." Journal of Biology and Life Science 5, no. 2 (August 10, 2014): 188. http://dx.doi.org/10.5296/jbls.v5i2.5585.

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Anexposure of low-powered laserpuncture at reproductive acupoint of catfish brood stock is known stimulate oocyte maturation. However, the profile of oocyte resulted from laserpuncture exposure has not been known. The present study aimed to identify the profile of catfish (Clarias sp.) oocyte in post-exposure laserpuncture. A total of 48 catfishes with ages of 8-9 months was grouped into two, i.e. fishes were exposed with laserpuncture and without exposure to laserpuncture (control) with 3 replications. Laserpuncture exposure was conducted once a week until the brood stock matured. Profile of oocyte such as, the GSI value, egg diameter, total of oocytes and the gonad maturity stage were examined. The results showed that laserpuncture exposure at the catfish reproductive acupoint could trigger the oocyte development without reducing quality of the oocyte indicated by the increase of gonadosomatic index (GSI), oocyte diameter, total of oocytes and gonad maturity stage similar to control. Moreover, laserpuncture exposure accelerated the gonad maturation, three weeks faster than control.

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SODRÉ, Jefferson G., Talles R. COLAÇO-FERNANDES, Lúcia H. RAPP PY-DANIEL, José L. O. BIRINDELLI, and Jansen ZUANON. "Putative poison gland in the thorny catfish Acanthodoras spinosissimus (Siluriformes: Doradidae)." Acta Amazonica 51, no. 3 (September 2021): 250–54. http://dx.doi.org/10.1590/1809-4392202101350.

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ABSTRACT Acanthodoras is the only genus of catfish known to secrete a conspicuous and abundant milky-looking substance through an axillary pore located just below the base of the posterior cleithral process. Despite this remarkable feature, there is no published information on the anatomical structures that produce the secretion and its possible biological/ecological functions. Dissection and histological analysis of preserved specimens of A. spinosissimus revealed the presence of a saccular axillary gland with large, binuclear secretory cells, similar to those found in other poisonous catfish. Secretory cells near the lumen appear to lose nuclei and become filled with secretory products, possibly with proteinaceous elements, as indicated by their eosinophilic appearance. As far as we know, the saccular morphology of the gland appears to constitute a unique characteristic of Acanthodoras among Doradidae catfishes. Further studies are necessary to determine the chemical composition of the secretion, as well as its possible uses by the catfish in its natural environment.

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40

Suzuki, Hana, and Phan Van Ngan. "Electrophoretic study on intraspecific variations and interspecific relationships of marine catfishes (Siluriformes, Ariidae) of Cananéia (São Paulo, Brazil): 1. General proteins of eye-lens and skeletic muscle." Boletim do Instituto Oceanográfico 38, no. 1 (1990): 31–42. http://dx.doi.org/10.1590/s0373-55241990000100005.

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Cellulose acetate electrophoresis of eye-lens proteins and Polyacrylamide flat gel electrophoresis of skeletic muscle proteins of six species of marine catfishes were carried out. Genetic polymorphism only occured at one locus of the electropherograms of eye-lens of Cathorops spixii. Ontogenetic variations in the relative concentration of bands were found in the electropherograms of eye-lens and skeletic muscle proteins. The six species of catfishes can be identified by means of quantitative and qualitative differences in the electropherograms. Coefficients of similarity were determined by the band-counting method and UPGMA dendrograms were constructed to illustrate the interspecific relationships among the species.

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BARATHKUMAR, Thathiredypalli R., and Muthusamy THANGARAJ. "Phylogenetic observation in Ariidae, Bagridae and Plotosidae catfishes by COI gene sequence analysis." Notulae Scientia Biologicae 12, no. 4 (December 21, 2020): 781–93. http://dx.doi.org/10.15835/nsb12410822.

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To understand the phylogenetic status of Ariidae, Bagridae and Plotosidae catfishes, this study was planned using the barcode gene, cytochrome oxidase I (COI). Totally 71 species were used in phylogenetic reconstructions under maximum parsimony, maximum likelihood and Bayesian inference criteria. The one-way ANOVA showed that the three catfish families are significantly different (F= 19.79, d.f. = 3; 116, P< 0.0001 (Plotosidae); F= 44.21, d.f.= 3; 986, P< 0.0001 (Ariidae); F= 24.83, d.f.= 3; 1322, P< 0.0001 (Bagridae). In MP, ML and BI based phylogenetic tree of Ariidae, Plicofollis genus displayed as a monophyletic group with higher bootstrap and posterior probability values for all the species except two species of Neoarius, which intervened separating P. polystaphylodon. In the phylogenetic tree of Plotoside, Plotosus genus displayed as monophyletic group with higher bootstrap and posterior probability values for all the eight species. In the case of Bagridae phylogeentic tree, Mystus genus displayed as a monophyletic group with higher bootstrap and posterior probability values for all the species except Mystus montanus forming a distant and distinct clade whereas Mystus tengara collides into monophyletic clade when Neotropius genuswas removed. By this study we could establish a phylogenetic hypothesis for all the 36 catfish families and examine the monophyly status of the subfamilies and genera.

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Boon, J. H., J. M. Smits, T. Wensing, and E. Lo. "Plasma proteins of young African catfish (Clarias gariepinus, Burchell 1822)." Netherlands Journal of Agricultural Science 35, no. 4 (November 1, 1987): 521–24. http://dx.doi.org/10.18174/njas.v35i4.16710.

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The effect of feeding level and water supply on the total content of plasma protein (TPP) and fractions of these proteins (PPF) of young African catfish was studied. It was found that TPP can be divided into 4 fractions (PPF I-IV), of which PPF I is predominant. Analysis of the results showed a strong effect of feeding level on TPP and PPF I-IV. There was a positive correlation between TPP and the weights of PPF I-IV, and a negative correlation between PPF I and PPF II. The PPF I fraction might be usable as an indicator for the health status of young catfishes. (Abstract retrieved from CAB Abstracts by CABI’s permission)

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MARCENIUK, ALEXANDRE PIRES, LEONARDO FERREIRA DA SILVA INGENITO, FLÁVIO CÉSAR THADEO LIMA, JOÃO LUIZ ROSETTI GASPARINI, and CLAUDIO OLIVEIRA. "Systematics, biogeography and conservation of Paragenidens grandoculis n. gen. and n. comb. (Siluriformes; Ariidae), a critically endangered species from southeastern Brazil." Zootaxa 4586, no. 3 (April 18, 2019): 425. http://dx.doi.org/10.11646/zootaxa.4586.3.2.

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Paragenidens, a new genus of ariid catfishes is proposed to accommodate Arius grandoculis, a species previously assigned to the genus Potamarius. Paragenidens grandoculis is an endemic ariid catfish categorized as Critically Endangered and probably Extinct from coastal lacustrine systems from Espírito Santo and Rio de Janeiro states, southeastern Brazil. After more than 50 years without records of the species, new recent fieldwork revealed that the species is extinct at lagoa Juparanã, but still can be found at lagoa Nova in Linhares municipality, Espírito Santo state. Here, Paragenidens is described based on morphological and molecular evidence. In addition to its generic reassignment, the species is redescribed, and comments on its phylogenetic relationships, biogeography and conservation are presented.

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Pouyaud, L., R. Gustiano, and G. G. Teugels. "CONTRIBUTION TO THE PHYLOGENY OF THE PANGASIIDAE BASED ON MITOCHONDRIAL 12S RDNA." Indonesian Journal of Agricultural Science 5, no. 2 (October 25, 2016): 4562. http://dx.doi.org/10.21082/ijas.v5n2.2004.4562.

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Catfishes are generally one of the economically important groups of fresh and brackish water fishes in the world. In many countries, they form a significant part of inland fisheries, and several species have been introduced in fish culture. Judging from literature, the main constraint to cultivate wild species and to optimise the production of pangasiid catfishes is due to the poorly documented systematics of this family. In the present contribution, the phylogenetic relationships within Pangasiidae are studied to contribute to a better insight in their taxonomy and evolution. The genetic relatedness is inferred using mitochondrial 12S rDNA gene sequences. To resolve the phylogenetic position of Laides in this group of catfish, five genera of Asian and African Schilbeidae are also considered. The results showed that a species group (complex) could be clearly seen in the genetic tree. Pangasius is more derive than the other genera. By using approximate molecular clock/evolutionary calibration from mitochondrial gene, a new episode of speciation for the family marked explosive radiation about 5- 8 million years ago (mya). This adaptive radiation extended until the Late Pleistocene. Regarding the relationships between the Pangasiidae and Schilbeidae, two families show an allopatric distribution with slight overlap. The Pangasiidae occur mainly in Southeast Asia, while the Schilbeidae are seen mainly on the Indian subcontinent (including Myanmar) and Africa. It confirms the separation between Schilbeidae and Pangasiidae occurred in the Early Miocene.

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Pouyaud, L., R. Gustiano, and G. G. Teugels. "CONTRIBUTION TO THE PHYLOGENY OF THE PANGASIIDAE BASED ON MITOCHONDRIAL 12S RDNA." Indonesian Journal of Agricultural Science 5, no. 2 (October 25, 2016): 4562. http://dx.doi.org/10.21082/ijas.v5n2.2004.p4562.

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Catfishes are generally one of the economically important groups of fresh and brackish water fishes in the world. In many countries, they form a significant part of inland fisheries, and several species have been introduced in fish culture. Judging from literature, the main constraint to cultivate wild species and to optimise the production of pangasiid catfishes is due to the poorly documented systematics of this family. In the present contribution, the phylogenetic relationships within Pangasiidae are studied to contribute to a better insight in their taxonomy and evolution. The genetic relatedness is inferred using mitochondrial 12S rDNA gene sequences. To resolve the phylogenetic position of Laides in this group of catfish, five genera of Asian and African Schilbeidae are also considered. The results showed that a species group (complex) could be clearly seen in the genetic tree. Pangasius is more derive than the other genera. By using approximate molecular clock/evolutionary calibration from mitochondrial gene, a new episode of speciation for the family marked explosive radiation about 5- 8 million years ago (mya). This adaptive radiation extended until the Late Pleistocene. Regarding the relationships between the Pangasiidae and Schilbeidae, two families show an allopatric distribution with slight overlap. The Pangasiidae occur mainly in Southeast Asia, while the Schilbeidae are seen mainly on the Indian subcontinent (including Myanmar) and Africa. It confirms the separation between Schilbeidae and Pangasiidae occurred in the Early Miocene.

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Kaatz, Ingrid M., and Donald J. Stewart. "Bioacoustic variation of swimbladder disturbance sounds in Neotropical doradoid catfishes (Siluriformes: Doradidae, Auchenipteridae): Potential morphological correlates." Current Zoology 58, no. 1 (February 1, 2012): 171–88. http://dx.doi.org/10.1093/czoolo/58.1.171.

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Abstract Swimbladder disturbance sounds of doradoid catfishes (Doradidae and Auchenipteridae) demonstrated striking waveform and spectrographic variation. We surveyed sounds of 25 doradoid species in 20 genera comparing these to sounds of four vocal outgroup catfish families. Sounds were either continuous waveforms (lacking interpulses) or pulsed (groups of pulses repeated at fixed temporal intervals). This is the first evidence for swimbladder calls with fixed interpulse patterns in catfishes. Vocal mechanism components that were similar between doradids and auchenipterids included: swimbladder shape, swimbladder dimensions and sonic muscle-somatic index. Morphological traits that showed variation among taxa and were evaluated for potential correlates of call diversity are: 1) diverticula (marginal outpocketings of the swimbladder with no connection to inner ear) and 2) elastic spring apparatus Müllerian rami (ESA-Mr). Within the doradid subfamilies and within the Auchenipteridae most species differed significantly in dominant frequency with frequency ranges overlapping to some extent for most. Doradid swim-bladder diverticula did not explain dominant frequency variation within the doradoid superfamily. Some doradids with conical ESA-Mr had the highest dominant frequency sounds. Auchenipterids included both relatively lower and higher dominant frequency sound producers but lacked diverticula and had discoidal ESA-Mr. Comparing a phylogeny of doradoid genera with out-group taxa, we infer that complex diverticula and conical ESA-Mr are derived characters within the Doradidae. Species representing outgroup families produced either continuous lower dominant frequency sounds (aspredinids, mochokids and pseu-dopimelodids) or pulsed higher dominant frequency sounds (pimelodids).

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Hanke, G. F., M. C. E. McNall, and J. Roberts. "First Records of the Yellow Bullhead, Ameiurus natalis, a Loricariid Catfish, Panaque suttonorum, and a Silver Pacu, Piaractus cf. P. brachypomus, in British Columbia." Canadian Field-Naturalist 120, no. 4 (October 1, 2006): 421. http://dx.doi.org/10.22621/cfn.v120i4.349.

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In Canada, there are no native catfish west of the continental divide and until recently, the list of extant exotic catfishes in British Columbia only included introduced Black Bullhead (Ameiurus melas) and Brown Bullhead (Ameiurus nebulosus). We report that a single Yellow Bullhead (Ameiurus natalis) was collected from Silvermere Lake in the Lower Fraser River drainage. This represents the first record of the Yellow Bullhead in western Canada, and its introduction likely was accidental with a shipment of Largemouth Bass (Micropterus salmoides) rather than dispersal from Washington. Warm, eutrophic, weedy habitat in the Fraser Delta provides ample habitat for Yellow Bullheads and other exotic fishes. A Blue-eyed Panaque (Panaque suttonorum), a loricariid catfish found in 1995 in Shawnigan Lake, Vancouver Island, probably represents a single, illegally released aquarium fish, as does a large Silver Pacu (Piaractus cf. P. brachypomus), which was found in Green Lake on Vancouver Island in 2004.

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Han, Chong, Qiang Li, Junqiu Xu, Xiufeng Li, and Jianrong Huang. "Characterization of Clarias gariepinus mitochondrial genome sequence and a comparative analysis with other catfishes." Biologia 70, no. 9 (September 1, 2015): 1245–53. http://dx.doi.org/10.1515/biolog-2015-0145.

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Abstract Clarias gariepinus is an economically important fish belonging to Siluriformes. In order to understand the characterization of catfishes, the complete mitochondrial genome sequence of the African catfish C. gariepinus was determined using 17 pairs of primers. The complete mitogenome is 16,508 bp in length and contains 37 mitochondrial genes (13 protein-coding, two rRNA, and 22 tRNA genes) and a control region as in most other fishes. Moreover, a comparison of C. gariepinus with Clarias batrachus, Clarias fuscus and Clarias sp. NM-2010 indicated that the four mitogenomics were similar in length, total nucleotide compositions and codon usage patterns, but different in 13 protein-coding genes, control region and other aspects. The complete mitochondrial genome sequence of C. gariepinus would contribute to better understanding of population genetics, conservation, biogeography and evolution of this species.

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PO, Samuel. "Effects of Photoperiod Regimes on Growth Performance of Heterobranchus bidorsalis (Geoffrey St. Hilaire, 1809) fingerlings under Laboratory Conditions." Aquaculture & Fisheries 5, no. 1 (March 9, 2021): 1–6. http://dx.doi.org/10.24966/aaf-5523/100037.

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Eshra, E., and A. El Asely. "Comparative osteology and three dimensional computed tomography of Nile catfishes, in relation to feeding mechanisms." Journal of Morphological Sciences 31, no. 03 (July 2014): 162–70. http://dx.doi.org/10.4322/jms.059913.

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Abstract Introduction: For the first time three- dimensional Computed Tomography was used in a study concerning Nile catfishes heads. Methods: The present study is carried out on 40 heads of four examplar species of catfish families, Bagridae (B. bajad); Clariidae (C.garpineus); Malapteruridae (M. electricus) and Mochokidae (S. schall). Specimens are double-stained for cartilage and bone, as done by Taylor and Van Dyke (1985). Results: the skull of M. electricus was consisted of both bones and cartilage, as the frontal, parietal, supraoccipital, postparietal, sphenotic and pterootic were remained cartilages in mature fish. In order to ease the studying process the bones of catfish skulls were arranged in clear twelve series. This arrangement may facilitate the diagnosis of the malformations and other related diseases. Despite the similarity of the feeding apparatus in the Nile-catfish, they have different feeding mechanisms. B. bajad able to feed on large sized preys because of the free branchiostegeal membrane, the large dimensions of the oral and pharyngeal gap limits. M. electricus has another method as we suggest that the liable cartilages which form the skull roof are easily squeezed by voluminous muscles, raise the roof of the mouth and expand the oropharynx. In S. schall the narrow oropharyngeal limits and the subterminal mouth are suitable for sucking small mollusks, a process aided by the hard pad of the upper lip and the brush like mandibular teeth. Conclusions: This work provides an anatomical description of the fish heads using 3D CT which may facilitate the diagnosis of malformations and other related diseases. It also discussed the different feeding habits of the Nile Catfish.

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