Artículo
Integrative study of the reproductive biology and growth of the characin dientudo paraguayo Acestrorhynchus pantaneiro (Characiformes, Acestrorhynchidae) presented as a protandrous hermaphroditic fish
Piazza, Yanina Grisel
; Lozano, Ismael Esteban
; Llamazares Vegh, Sabina
; Lo Nostro, Fabiana Laura
; Fuentes, Carlos Mariano
Fecha de publicación:
04/2023
Editorial:
Wiley Blackwell Publishing, Inc
Revista:
Journal of Fish Biology
ISSN:
0022-1112
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
We studied the reproductive strategy, sexual system and growth of dientudo paraguayo Acestrorhynchus pantaneiro. After 2 years of monitoring in shallow areas of a floodplain lake from the lower Paraná basin (Argentina), it was evidenced that water temperature modulated gonadal maturation, but it was the river water level the synchronising stimulus that triggered spawning. This species exhibited a single annual breeding period from October to January, with most spawning activity in November. According to the von Bertalanffy growth curve, fish would reach autumn to winter months with LS of ~120 mm, already mature males. The first mature females were found at LS of 210 mm, becoming sexually mature between the second and third breeding seasons. This is the first integrative study that includes the body-length frequency distribution and sex differential size at first maturity and growth, and reports the presence of intersex gonads questioning its sexual pattern from gonochoristic to sequential hermaphrodite species. The sexual pattern, the multiple spawning behaviour and a medium to high absolute fecundity support the opportunistic and invasive behavior observed in previous contributions for this characiform species.
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Articulos(IBBEA)
Articulos de INSTITUTO DE BIODIVERSIDAD Y BIOLOGIA EXPERIMENTAL Y APLICADA
Articulos de INSTITUTO DE BIODIVERSIDAD Y BIOLOGIA EXPERIMENTAL Y APLICADA
Articulos(INPA)
Articulos de UNIDAD EJECUTORA DE INVESTIGACIONES EN PRODUCCION ANIMAL
Articulos de UNIDAD EJECUTORA DE INVESTIGACIONES EN PRODUCCION ANIMAL
Citación
Piazza, Yanina Grisel; Lozano, Ismael Esteban; Llamazares Vegh, Sabina; Lo Nostro, Fabiana Laura; Fuentes, Carlos Mariano; Integrative study of the reproductive biology and growth of the characin dientudo paraguayo Acestrorhynchus pantaneiro (Characiformes, Acestrorhynchidae) presented as a protandrous hermaphroditic fish; Wiley Blackwell Publishing, Inc; Journal of Fish Biology; 102; 4; 4-2023; 977-991
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