Find research datasets worth reusing
Search datasets from major research repositories and use ShareScore to quickly assess how well each record supports discovery, access, and reuse.
73
datasets available to search
ShareScore release 0.9.0
Dataset results
73 results for “Channidae”
Fig. 6 in Morphometric Analysis Of Trianchoratus Price & Berry, 1966 (Monogenea: Heteronchocleidinae) From Channa Spp. (Osteichthyes: Channidae) Of Peninsular Malaysia
Fig. 6. PCA plot of Trianchoratus malayensis, with geographical origin of data indicated. The horizontal and vertical barplots indicate one-dimensional summary of the PC axes.
Fig. 3 in Morphometric Analysis Of Trianchoratus Price & Berry, 1966 (Monogenea: Heteronchocleidinae) From Channa Spp. (Osteichthyes: Channidae) Of Peninsular Malaysia
Fig. 3. Biplot of the first two principal components for the four species of Trianchoratus, with mean coordinates of the species indicated. Only vectors (IL1, OL1, IR1, OR1 and pt1) from one ventral anchor are shown.
Fig. 1. A in Morphometric Analysis Of Trianchoratus Price & Berry, 1966 (Monogenea: Heteronchocleidinae) From Channa Spp. (Osteichthyes: Channidae) Of Peninsular Malaysia
Fig. 1. A well-developed anchor of Trianchoratus species showing the basic measurements taken for morphometric analysis.
Fig. 4 in Morphometric Analysis Of Trianchoratus Price & Berry, 1966 (Monogenea: Heteronchocleidinae) From Channa Spp. (Osteichthyes: Channidae) Of Peninsular Malaysia
Fig. 4. Chernoff faces: graphical summary of the mean of each of the 15 variables in the four Trianchoratus species represented as different facial features.
Fig. 5 in Morphometric Analysis Of Trianchoratus Price & Berry, 1966 (Monogenea: Heteronchocleidinae) From Channa Spp. (Osteichthyes: Channidae) Of Peninsular Malaysia
Fig. 5. Fisher's linear discriminant analysis plots of the first three LD functions, which account for 65%, 21% and 14% of the total variation, respectively. Indicators: Trianchoratus malayensis (-); T. pahangensis (+); T. ophicephali (o); T. longianchoratus (l).
Fig. 8 in Morphometric Analysis Of Trianchoratus Price & Berry, 1966 (Monogenea: Heteronchocleidinae) From Channa Spp. (Osteichthyes: Channidae) Of Peninsular Malaysia
Fig. 8. PCA plot of Trianchoratus ophicephali with geographical origin of data indicated. The horizontal and vertical barplots indicate one-dimensional summary of the PC axes.
FIGURE 6. X in Unexpected species diversity within Sri Lanka's snakehead fishes of the Channa marulius group (Teleostei: Channidae)
FIGURE 6. X-radiographs of members of the Marulius group in Sri Lanka. A, Channa ara, 2020.02.01.NH, neotype, 300 mm SL, Angammedilla, Mahaweli River; B, C. marulius, DZ 4900, 350 mm SL, Rajanganaya, Kala Oya; C, C. cf. ara, DZ 4330, 230 mm SL, Lewwanduwa, Bentara River.
FIGURE 8 in Unexpected species diversity within Sri Lanka's snakehead fishes of the Channa marulius group (Teleostei: Channidae)
FIGURE 8. Colouration of Channa pseudomarulius. A, before preservation, ZRC 22869, 363 mm SL, South India, Chalakudy River, photo courtesy of Rohan Pethiyagoda; B, in preservation, WHT 30815, 217 mm SL, South India, Kerala, Alleppey.
Data from: Snakehead (Teleostei: Channidae) diversity and the Eastern Himalaya biodiversity hotspot
The collision of Indian and Eurasian landmasses in the Cenozoic was a decisive factor in shaping biodiversity patterns in Southern and Southeastern Asia. While most studies thus far have focused on the biotic interchange between India and Eurasia and evolutionary diversification on or around the Tibetan Plateau little attention has been paid to the biodiversity build-up in the Eastern Himalaya biodiversity hotspot (EHH) which harbours over 540 freshwater fish species with a high degree of endemicity. An important component of the regional ichthyofauna are snakeheads fishes of the family Channidae comprising throughout their African-Asian distribution 47 valid species, but a poorly known species-level diversity. In order to evaluate channid intrarelationships and biogeography a temporal and geographical framework of channid evolution in conjunction with a critical reevaluation of the channid fossil record is warranted. Based on molecular data, we provide a comprehensive species-level phylogeny based on 223 channid individuals belonging to 37 species and one additional currently undescribed species. The first split within channids separates the African genus Parachanna from the Asian genus Channa which can be divided into eight distinct species groups (C. micropeltes, C. lucius , C. asiatica, C. argus, C. marulius, C. striata, C. punctata and C. gachua species groups). Large intraspecific divergences were observed within several species and potentially indicate additional species-level diversity. Almost 40% of the channid species are narrow-range endemics belonging to the C. gachua species group. These are found in the EHH making this area an outstanding hotspot for endemic channid diversity. The large majority of the EHH endemics are restricted to the southern foothills of the Eastern Himalaya and the Shillong-Mikir Hills Plateau, areas west of the Indo-Burman Ranges. Our results reveal complex and difficult to interpret biogeographic patterns indicating that both vicariance and dispersal events have potentially been responsible in shaping current distribution patterns in Asian channids. We recognize †Parachanna fayumensis as the oldest reliable channid fossil, and argue that the three oldest so-called channid fossils (i.e., †Eochanna chlorakkiensis, †Anchichanna kuldanensis, and †Ophiocephalus lydekkeri) lack clear diagnostic features that would allow them to be unequivocally placed within Channidae.
Data from: Barcoding snakeheads (Teleostei, Channidae) revisited: discovering greater species diversity and resolving perpetuated taxonomic confusions
Snakehead fishes of the family Channidae are predatory freshwater teleosts from Africa and Asia comprising 38 valid species. Snakeheads are important food fishes (aquaculture, live food trade) and have been introduced widely with several species becoming highly invasive. A channid barcode library was recently assembled by Serrao and co-workers to better detect and identify potential and established invasive snakehead species outside their native range. Comparing our own recent phylogenetic results of this taxonomically confusing group with those previously reported revealed several inconsistencies that prompted us to expand and improve on previous studies. By generating 343 novel snakehead coxI sequences and combining them with an additional 434 coxI sequences from GenBank we highlight several problems with previous efforts towards the assembly of a snakehead reference barcode library. We found that 16.3% of the channid coxI sequences deposited in GenBank are based on misidentifications. With the inclusion of our own data we were, however, able to solve these cases of perpetuated taxonomic confusion. Different species delimitation approaches we employed (BIN, GMYC, and PTP) were congruent in suggesting a potentially much higher species diversity within snakeheads than currently recognized. In total, 90 BINs were recovered and within a total of 15 currently recognized species multiple BINs were identified. This higher species diversity is mostly due to either the incorporation of undescribed, narrow range, endemics from the Eastern Himalaya biodiversity hotspot or the incorporation of several widespread species characterized by deep genetic splits between geographically well-defined lineages. In the latter case, over-lumping in the past has deflated the actual species numbers. Further integrative approaches are clearly needed for providing a better taxonomic understanding of snakehead diversity, new species descriptions and taxonomic revisions of the group.
FIGURE 5 in Channa andrao, a new species of dwarf snakehead from West Bengal, India (Teleostei: Channidae)
FIGURE 5. Pectoral fins of A, Channa andrao, BMNH 2013.10.1.2, holotype, 98.2 mm; B, C. orientalis ZMB 5029, 79.7 mm SL; C, C. bleheri, ZFMK 16555, holotype, 105.7 mm SL; D, C. asiatica, BMNH 1933.3.11.900, 115.7 mm SL.
FIGURE 1. Channa andrao, BMNH 2013.10.1.2 in Channa andrao, a new species of dwarf snakehead from West Bengal, India (Teleostei: Channidae)
FIGURE 1. Channa andrao, BMNH 2013.10.1.2, holotype, 98.2 mm SL; India: West Bengal: Lefraguri swamp.
FIGURE 1 in Channa aurantipectoralis, a new species of snakehead from Mizoram, north-eastern India (Teleostei: Channidae)
FIGURE 1. Channa aurantipectoralis; a) holotype, ZSI FF 5635, 165 mm SL; lateral, dorsal and ventral views; b) paratype, PUCMF 16005, 89.3 mm SL; lateral view.
FIGURE 2 in Channa aurantipectoralis, a new species of snakehead from Mizoram, north-eastern India (Teleostei: Channidae)
FIGURE 2. Channa aurantipectoralis, (specimen not preserved), 154 mm SL (approx.); showing coloration in life; lateral and dorsal views.
FIGURE 6 in Channa pseudomarulius, a valid species of snakehead from the Western Ghats region of peninsular India (Teleostei: Channidae), with comments on Ophicephalus grandinosus, O. theophrasti and O. leucopunctatus
FIGURE 6. Original illustration (A) of Ophicephalus grandinosus reproduced from Cuvier & Valenciennes (1831) and lateral view (B) of lectotype (MNHN A 1959, 564 mm SL). Original illustration (C) of O. theophrasti reproduced from Jacquemont (1839) and lateral view (D) of holotype (MNHN A-668, 330 mm SL). Reproduction of Sykes' (1841) original illustration of O. leucopunctatus (E).
FIGURE 3 in Channa pseudomarulius, a valid species of snakehead from the Western Ghats region of peninsular India (Teleostei: Channidae), with comments on Ophicephalus grandinosus, O. theophrasti and O. leucopunctatus
FIGURE 3. Channa pseudomarulius, colouration in life. Juvenile (A), KUFOS 2017.KUT.15, ca. 55 mm SL, Kerala, Kuttiyadi river; juvenile (B) ca. 80 mm SL, Kerala, Irrity, not preserved; subadult (C), 164 mm SL, Kerala, Pamba River, not preserved.
FIGURE 1 in Channa pseudomarulius, a valid species of snakehead from the Western Ghats region of peninsular India (Teleostei: Channidae), with comments on Ophicephalus grandinosus, O. theophrasti and O. leucopunctatus
FIGURE 1. Map of the Indian subcontinent showing geographical origin of specimens and DNA samples examined in this study. Only reasonably precise localities are mapped. Type locality of Channa pseudomarulius uncertain.
FIGURE 2 in Channa pseudomarulius, a valid species of snakehead from the Western Ghats region of peninsular India (Teleostei: Channidae), with comments on Ophicephalus grandinosus, O. theophrasti and O. leucopunctatus
FIGURE 2. Channa pseudomarulius, holotype (BMNH 1854.6.13.123, 200 mm SL), lateral view (A); juvenile (KUFOS 2017.KUT.15, 56 mm SL), lateral view (B); juvenile (ZRC 41657, 100.5 mm SL), lateral view (C); adult (ZRC 22869, 363 mm SL), lateral view.
FIGURE 8 in Channa pseudomarulius, a valid species of snakehead from the Western Ghats region of peninsular India (Teleostei: Channidae), with comments on Ophicephalus grandinosus, O. theophrasti and O. leucopunctatus
FIGURE 8. Scatter plot of head length versus standard length, loess lines show trend for each species. The appearance of larger head sizes in Channa pseudomarulius specimens is related to the shorter body of this species in comparison to C. marulius, as reflected by lower vertebral, lateral line scale, and dorsal- and anal-fin ray counts (see Figure 7). This difference in head size is especially apparent when comparing larger specimens (>200mm).
FIGURE 7 in Channa pseudomarulius, a valid species of snakehead from the Western Ghats region of peninsular India (Teleostei: Channidae), with comments on Ophicephalus grandinosus, O. theophrasti and O. leucopunctatus
FIGURE 7. Bar graphs of selected meristic characters illustrating differences between Channa pseudomarulius and C. marulius (data includes lectotype of O. grandinosus and holotype of O. theophrasti as C. marulius).
ScienceDex guides
Understand access before you commit
These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
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.