Morphological diversity of the American crocodile (Crocodylus acutus) in the Yucatán Peninsula
Periodo de realización: 1900/01/01 al 2017/01/01
Tipo: Artículo científico
Resumen: "Recent evidence suggests that morphological
divergence of the American crocodile (Crocodylus acutus)
occurred in Greater Antilles under conditions of prolonged
isolation and hybridization with the Cuban crocodile (C.
rhombifer). We investigated morphological diversity in
C. acutus in the coastal zone of the Yucata´n Peninsula,
where isolation and hybridization have also been reported.
We compared the relationships among various morphological
traits between insular and coastal populations. Our
results suggest morphological diversity in the region,
which is possibly related to population isolation and
mechanical constraints imposed by differences in diet. A
broad-snouted morphotype appears typical of island populations.
Hybridization could also cause morphological
variation, but its importance in this case remains to be
confirmed. Sexual dimorphism of the American crocodile
in the region appears to be less pronounced than for other
crocodilians. We also provide population-specific size
estimation models for two populations (Banco Chinchorro
and Cozumel) to improve future monitoring."