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2,258 results for “Catfish”
Environmental-related variation of stoichiometric traits in body and organs of non-native sailfin catfishes Pterygoplichthys spp.
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Files for phylogenetic analyses and molecular diagnosis between Diplomystidae catfish species
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Loricarioid catfish evolved skin denticles that recapitulate teeth at the structural, developmental, and genetic levels (raw RNAseq reads)
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Diversification of body shape in catfishes of the Ganga River
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Effects of acute exposure to polystyrene nanoplastics on the channel catfish larvae: Insights from energy metabolism and transcriptomic analysis
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Complex patterns of genetic population structure in the mouthbrooding marine catfish, Bagre marinus, in the Gulf of Mexico and U.S. Atlantic
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Exceptional longevity in northern peripheral populations of Wels catfish (Silurus glanis)
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Data from: Exceptional levels of species discovery ameliorate inferences of the biogeography and diversification of an Afrotropical catfish family
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Figure 3 in Two new species of miniature psammophilic sarcoglanidine catfishes of the genus Microcambeva from the Atlantic Forest of eastern Brazil (Siluriformes: Trichomycteridae)
Figure 3. Map of geographical distribution of Microcambeva: white square, M. draco; black square, M. mucuriensis; star, M. jucuensis; circle, M. barbata; triangle, M. ribeirae.
Figure 7 in Two new species of miniature psammophilic sarcoglanidine catfishes of the genus Microcambeva from the Atlantic Forest of eastern Brazil (Siluriformes: Trichomycteridae)
Figure 7. Stream tributary to Rio Jucu, the type locality of Microcambeva mucuriensis, Viana, Espírito Santo, Brazil.
Figure 5 in Two new species of miniature psammophilic sarcoglanidine catfishes of the genus Microcambeva from the Atlantic Forest of eastern Brazil (Siluriformes: Trichomycteridae)
Figure 5. Microcambeva jucuensis sp. nov., UFRJ 12124, holotype, 27.2 mm standard length: (a) left lateral view (in life); (b) left lateral view (preserved); (c) head, dorsal view; (d) head, ventral view.
FIGURE 1. Bunocephalus larai, LIRP 9991, 49.5 in Bunocephalus hertzi, a new banjo catfish from the upper Rio Paraná basin, Brazil (Siluriformes: Aspredinidae), with the redescription of Bunocephalus larai Ihering 1930
FIGURE 1. Bunocephalus larai, LIRP 9991, 49.5 mm SL; Brazil, Goiás: upper Rio Paraná, Rio Paranaíba, Ribeirão Ponte Alta.
FIGURES 1–10. Atopogyrodactylus praecipuus n. gen., n in Neotropical Monogenoidea. 63. Atopogyrodactylus praecipuus gen. et sp. n. (Gyrodactylidae), an oviparous gyrodactylid from the external surface of a bristlenose catfish Ancistrus sp. (Siluriformes: Loricariidae) from the Rondônian Amazon, Brazil
FIGURES 1–10. Atopogyrodactylus praecipuus n. gen., n. sp. from the external surface of a bristlenose catfish, Ancistrus sp. in Brazil. 1. Whole mount of adult, composite, ventral view. 2, 3. Accessory copulatory sclerites. 4. Terminal genitalia (male and female) of an immature specimen. 5. Whole mount of immature specimen (composite, ventral view). 6. Hook. 7. Egg. 8. Oviduct. 9. Anchor. 10. Haptor. Abbreviations: mco, male copulatory organ; as, accessory copulatory sclerite; vit, vitelline follicle; g, germarium; sv, seminal vesicle; ov, oviduct; c, cecum.
FIGURE 2 in Kudoa ajurutellus n. sp. (Multivalvulida: Kudoidae), a parasite of the skeletal musculature of the Bressou sea catfish, Aspistor quadriscutis, in northeastern of the State of Pará
FIGURE 2. Light photomicrography: Fresh pseudocysts and spores of Kudoa ajurutellus n. sp. from the fiber muscular skeletal of A. quadriscutis. A. Fresh pseudocysts of Kudoa ajurutellus n. sp. (P) from the musculares skeletal. Scale bar: 10 µm. B. Spores (S) in muscle fiber (F). In detail: Spores of Kudoa ajurutellus n. sp., showing the four polar capsules (PC) under DIC. Scale bar: 20 µm
FIGURE 4 in Kudoa ajurutellus n. sp. (Multivalvulida: Kudoidae), a parasite of the skeletal musculature of the Bressou sea catfish, Aspistor quadriscutis, in northeastern of the State of Pará
FIGURE 4. Phylogenetic tree generated by the Bayesian Inference (BI) analysis of the aligned partial 18S rDNA gene sequences of Kudoa ajurutellus n. sp. and related Kudoa spp.. The GenBank accession numbers are shown adjacent to the species names. The numbers at the nodes are posterior probability values calculated for BI. The new species is shown in bold type.
An investigation of ZZ/ZW and XX/XY sex determination systems in North African catfish (Clarias gariepinus)
<p class="CxSpFirst">Sex-specific loci are powerful tools for identifying sex determination systems. They offer a molecular biotechnological approach for producing all‐male or all-female fish for commercial breeding. The North African catfish has been widely adopted for aquaculture, because its superior growth and disease resistance render the species suitable for hybridization with other catfish, to improve the productivity and quality of fish meat. North African catfish have either a ZZ/ZW or XX/XY sex determination system. Here, we investigate and characterize these systems using high-throughput genome complexity reduction sequencing. This approach was effective for identifying sex-specific loci with both single-nucleotide polymorphisms (SNPs) and restriction fragment presence/absence (PA) markers in 30 phenotypic sex assignments of North African catfish. In total, 41 male-linked loci met the criteria of moderately sex-linked loci (70:30, male:female; 80:20, male:female). By contrast, only 25 female-linked loci were detected from moderately sex-linked loci, and no perfectly male- or female-specific sex-linked loci were observed. Several male-linked loci were partially homologous to transposable element and functional genes, and most also showed partial homology with several amniote sex chromosomal linkages. This suggests that an ancestral amniote super-sex chromosome with overlaps of partial sex chromosomal linkages was also found in teleosts, and that the male heterogametic XX/XY sex determination system should exist in North African catfish. The putative Y chromosome is young and the non-recombination region is highly cryptic. In addition, the ZW type of North African catfish exhibits heteromorphic sex chromosomes, whereas the two other groups of North African catfish have different sex determination systems. Thus, turnover of sex chromosome systems might have occurred stochastically in ancestral homomorphic sex chromosomes. The XY group has been introduced into Thailand for commercial breeding. This approach using sex-specific loci provides a solid baseline for revealing sex determination mechanisms and identify potential sex determination regions in catfish, allowing further investigation of genetic improvements in breeding programs.</p>
FIGURE 6 in Record of the Non-native Suckermouth armored catfish hybrid Pterygoplichthys pardalis (Castelnau,1985) x Pterygoplichtys disjunctivus (Weber, 1991) (Siluriformes: Loricariidae) in Honduras
FIGURE 6. Eggs found in female Pterygoplichthys pardalis x disjunctivus Specimen MUVS-204. A. Eggs measuring 2 mm B. Eggs Measuring 3 mm.
FIGURE 2 in Record of the Non-native Suckermouth armored catfish hybrid Pterygoplichthys pardalis (Castelnau,1985) x Pterygoplichtys disjunctivus (Weber, 1991) (Siluriformes: Loricariidae) in Honduras
FIGURE 2. Map detailing sample localities for specimens of Pterygoplichthys pardalis x disjunctivus: A) Lake Yojoa B) Jucutuma lagoon.
FIGURE 4 in Record of the Non-native Suckermouth armored catfish hybrid Pterygoplichthys pardalis (Castelnau,1985) x Pterygoplichtys disjunctivus (Weber, 1991) (Siluriformes: Loricariidae) in Honduras
FIGURE 4. Variations in ventral spots of the three specimens of hybrid Pterygoplichthys pardalis x disjunctivus captured in the Yojoa Lake, Honduras and Jucutuma Lagoon, 2018: A) MUVS-203 intermediate forms in ventral vermiculations, B) MUVS-204 with intermediate ventral spots C) La Naturaleza Tank specimen with intermediate ventral vermiculations and spots.
Data from: Chromosome-level assembly of Southern catfish (Silurus meridionalis) provides insights into visual adaptation to the nocturnal and benthic lifestyles
Southern catfish (<i><span>Silurus meridionalis</span></i>) is a nocturnal and benthic freshwater fish endemic to the Yangtze River and its tributaries with an important economic value but a drastically declining wild population. In this study, we constructed a chromosome-level draft genome of <i><span>S. meridionalis</span></i> using 69.7 Gb Nanopore long reads and 49.5 Gb Illumina short reads. The genome assembly was 741.2 Mb in size with a contig N50 of 13.19 Mb. An additional 116.4 Gb of Bionano and 77.4 Gb of Hi-C data were applied to assemble contigs into scaffolds and further into 29 chromosomes, resulting in a 738.9 Mb genome with a scaffold N50 of 28.04 Mb. A total of 22,965 protein-coding genes were predicted from the genome with 22,519 (98.06%) genes functionally annotated. Comparative genomic and transcriptomic analyses revealed that catfish possess a rod-dominated visual system which is responsible for scotopic vision. The absence of cone opsins SWS1 and SWS2 resulted in the lack of UV and violet sensitivity. Mutations at key amino acid sites of RH1.1, RH1.2 and RH2 resulted in spectral tuning good for dim light vision and narrow color vision. A higher expression level of rod phototransduction genes than that of cone genes and higher rod-to-cone ratio leaded to higher optical sensitivity under dim light conditions. In addition, analysis of the genes involved in eye morphogenesis and development revealed the loss of conserved noncoding elements (CNEs), which might be associated with the small eyes in catfish. Taken together, our study provided important clues for the adaptation of the catfish visual system to a benthic lifestyle. The draft genome of <i><span>S. meridionalis</span></i> represents a valuable resource for elucidation of molecular mechanism of ecological adaptation, as well as genetic breeding in aquaculture.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.