Artículo
Relative growth and morphological sexual maturity size of the freshwater crab Trichodactylus borellianus (Crustacea, Decapoda, Trichodactylidae) in the Middle Paraná River, Argentina
Fecha de publicación:
12/2014
Editorial:
Pensoft Publishers
Revista:
ZooKeys
ISSN:
1313-2989
e-ISSN:
1313-2970
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The relative growth of a number of morphological dimensions of the South American freshwater crabTrichodactylus borellianus (Trichodactylidae) were compared and related to sexual dimorphism. Crabs werecollected from ponds in the Middle Paraná River in Argentina. A regression model with segmented relationship was used to test for relative growth between these measurements where breakpoints infer the body size at which crabs reach sexual maturity. In both sexes the carapace width and the length, height, and thickness of the right and left chelae were measured, as well as the male pleopod length and the female abdomen width. All of these measurements were found to show positive allometry with the exception of the male pleopod length and the left chelae, which did not show a breakpoint. In females the breakpoint for the abdomen width inferred a morphological sexual maturity at carapace width 6.9 mm. In males the break point for the pleopod length was at carapace width 6.6 mm, with that for the chelae measurements was between carapace widths 6.4 and 6.9 mm. The relative growth pattern in T. borellianus was found to be similar to that recorded for other species of the family Trichodactylidae.
Palabras clave:
Chelipeds
,
cephalothorax width
,
pleopods
,
reproduction
,
growth
,
regression model
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(INALI)
Articulos de INST.NAC.DE LIMNOLOGIA (I)
Articulos de INST.NAC.DE LIMNOLOGIA (I)
Citación
Williner, Verónica; Torres, María Victoria; de Azevedo Carvalho, Débora; Köing, Natalia; Relative growth and morphological sexual maturity size of the freshwater crab Trichodactylus borellianus (Crustacea, Decapoda, Trichodactylidae) in the Middle Paraná River, Argentina; Pensoft Publishers; ZooKeys; 457; 12-2014; 159-170
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