Dilación del desove de Modiolus capax(Bivalvia: Mytilidae)

Farfán, Claudia; Espinoza Peralta, Ana María; Tapia Vázquez, Olivia

Dilación del desove de Modiolus capax (Bivalvia: Mytilidae)

dc.creator	Farfán, Claudia
dc.creator	Espinoza Peralta, Ana María
dc.creator	Tapia Vázquez, Olivia
dc.date	2015-07-23
dc.date.accessioned	2016-05-03T15:31:21Z
dc.date.available	2016-05-03T15:31:21Z
dc.identifier	http://revistas.ucr.ac.cr/index.php/rbt/article/view/20124
dc.identifier.uri	https://hdl.handle.net/10669/27041
dc.description	The capacity of Modiolus capax to delay spawning and to hold mature gametes for long periods, was analyzed in sexually mature organisms subjected to cold water and food rations higher than those for maintenance. The experimental group, 200 mussels collected in August from Babia de los Angeles, Baja California, Mexico, was subjected to 19±2°C, temperature comparable to that in the natural environment during autumn and early winter; the daily food rations, delivered in open flow, were equivalent to 0.5-1.0% of the mussel's dry soft body weight. The effectiveness of the experimental treatment was verified every month in a sample of 16 mussels; for contras!, a sample from Bahia de los Angeles was also analyzed. The assessed variables were general condition and gonadosomatic indices and for the histological study of the gonads, a maturity scale with eight stages was designed. In September the mussels from the natural environment were in the initial phase of post-spawning; by December they were in late post-spawning or rest. In the experimental group there were no spontaneous spawnin.ss and general condition and gonadosomatic indices remained consistently higher than in the natural environment, however, by the eight-week of treatment the gonads showed evidences of incipient reabsorption. It is proposed that the natural reproductive cycle, mass spawning in summer and rest in late autumn and early winter, might be limiting the mussel's capacity to retain mature gametes	es-ES
dc.description	The capacity of Modiolus capax to delay spawning and to hold mature gametes for long periods, was analyzed in sexually mature organisms subjected to cold water and food rations higher than those for maintenance. The experimental group, 200 mussels collected in August from Babia de los Angeles, Baja California, Mexico, was subjected to 19±2°C, temperature comparable to that in the natural environment during autumn and early winter; the daily food rations, delivered in open flow, were equivalent to 0.5-1.0% of the mussel's dry soft body weight. The effectiveness of the experimental treatment was verified every month in a sample of 16 mussels; for contras!, a sample from Bahia de los Angeles was also analyzed. The assessed variables were general condition and gonadosomatic indices and for the histological study of the gonads, a maturity scale with eight stages was designed. In September the mussels from the natural environment were in the initial phase of post-spawning; by December they were in late post-spawning or rest. In the experimental group there were no spontaneous spawnin.ss and general condition and gonadosomatic indices remained consistently higher than in the natural environment, however, by the eight-week of treatment the gonads showed evidences of incipient reabsorption. It is proposed that the natural reproductive cycle, mass spawning in summer and rest in late autumn and early winter, might be limiting the mussel's capacity to retain mature gametes	en-US
dc.format	application/pdf
dc.language	spa
dc.publisher	Universidad de Costa Rica	en-US
dc.rights	Copyright (c) 2015 International Journal of Tropical Biology and Conservation	en-US
dc.source	Revista de Biología Tropical/International Journal of Tropical Biology and Conservation; Vol. 46 (3) Setember 1998; 633-641	en-US
dc.source	Revista de Biología Tropical/International Journal of Tropical Biology and Conservation; Vol. 46 (3) Setember 1998; 633-641	es-ES
dc.source	Revista Biología Tropical; Vol. 46 (3) Setember 1998; 633-641	pt-PT
dc.source	2215-2075
dc.source	0034-7744
dc.subject	mussels	en-US
dc.subject	reproduction	en-US
dc.subject	delayed spawning	en-US
dc.subject	modiolus capax	en-US
dc.title	Dilación del desove de Modiolus capax(Bivalvia: Mytilidae)	es-ES
dc.title	Dilación del desove de Modiolus capax (Bivalvia: Mytilidae)	en-US
dc.type	artículo original

Ficheros en el ítem

Ficheros	Tamaño	Formato	Ver
No hay ficheros asociados a este ítem.

Este ítem aparece en la(s) siguiente(s) colección(ones)

Revista de Biología Tropical [2107]

Mostrar el registro sencillo del ítem