For the discussion of catfish systematics. Post here to draw our attention to new publications or to discuss existing works.
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Dwivedi, A.K., Verma, H.O. & Dewan, S. Diversification of Body Shape in Catfishes of the Ganga River. Natl. Acad. Sci. Lett.
(2022). Published: 24 September 2022. https://doi.org/10.1007/s40009-022-01168-w
https://link.springer.com/article/10.10 ... 22-01168-w
This study utilizes photographs of 39 Gangetic catfishes to evaluate inter-specific phenotypic relationship through Geometric Morphometrics (GM). Permutational multivariate analysis of variance (PERMANOVA) revealed significant relationship (F = 4.50, p < 0.0001) between shape of all the species. Procrustes analysis of variance (ANOVA) revealed significant relationship between shape and size (F = 17.67, p < 0.0001) and between shape (F = 34.95, p < 0.0001) of all species. Morphospace phenogram depicted that all the species under respective genus clustered together within that genus, indicating that species of respective genus share common phenotypic traits and have evolutionary relatedness, affirming the implication of geometric morphometrics in showcasing phenotypic relatedness among Gangetic catfishes. This study has high implications for understanding the ecological and evolutionary problems in relation to morphological diversity in catfishes.
- Location of 14 Landmarks refer to 1. anterior tip of snout at upper jaw 2. most posterior aspect of neurocranium (beginning of scaled nape) 3. origin of dorsal fin 4. end of dorsal fin 5. anterior attachment of dorsal membrane from caudal fin 6. posterior end of vertebral column 7. anterior attachment of ventral membrane from caudal fin 8. end of anal fin 9. origin of anal fin 10. insertion of pelvic fin 11. insertion of pectoral fin 12. ventral edge of the operculum 13. posterior end of eye 14. anterior end of eye (a: catfish with dorsal and adipose fin both, b: catfish with only dorsal fin)