Compsaraia samueli
Compsaraia samueli is a species of apteronotid electric fish that exhibits pronounced sexual dimorphism in which mature males develop extremely elongated snouts and oral jaws. [1] This phenotype is found in several other apteronotid species and is used in agonistic jaw-locking behaviors between males.[2] A study comparing skull shape and jaw-closing performance in males and females of Compsaraia samueli suggested that males with elongated faces for use in fights also had lower mechanical advantages, indicating a trade-off between sexual weaponry and jaw leverage.[3]
| Compsaraia samueli | |
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| Species: | C. samueli |
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| Compsaraia samueli (Albert & Crampton, 2009) | |
References
- Albert, James S.; Crampton, William G. R. (2009). "A new species of electric knifefish, genus Compsaraia (Gymnotiformes: Apteronotidae) from the Amazon River, with extreme sexual dimorphism in snout and jaw length". Systematics and Biodiversity. 7 (1): 81–92. doi:10.1017/S1477200008002934. S2CID 53333824.
- Triefenbach, Frank A.; Zakon, Harold H. (2008). "Changes in signalling during agonistic interactions between male weakly electric knifefish, Apteronotus leptorhynchus". Animal Behaviour. 75 (4): 1263–1272. doi:10.1016/j.anbehav.2007.09.027. S2CID 53155927.
- Evans, Kory M.; Maxwell, J. Bernt; Kolmann, Matthew A.; Ford, Kassandra L.; Albert, James S. (2019). "Why the long face? Static allometry in the sexually dimorphic phenotypes of Neotropical electric fishes". Zoological Journal of the Linnean Society. 186 (3): 633–649. doi:10.1093/zoolinnean/zly076.
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