Dilación del desove de Modiolus capax(Bivalvia: Mytilidae)
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...
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| Formato: | Online |
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Universidad de Costa Rica
1998
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| Acceso en línea: | https://revistas.ucr.ac.cr/index.php/rbt/article/view/20124 |
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RBT20124 |
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RBT201242022-05-25T20:59:13Z Dilación del desove de Modiolus capax (Bivalvia: Mytilidae) Dilación del desove de Modiolus capax(Bivalvia: Mytilidae) Farfán, Claudia Espinoza Peralta, Ana María Tapia V ázquez, Olivia mussels reproduction delayed spawning modiolus capax 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 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 Universidad de Costa Rica 1998-09-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Article application/pdf https://revistas.ucr.ac.cr/index.php/rbt/article/view/20124 10.15517/rbt.v46i3.20124 Revista de Biología Tropical; Vol. 46 No. 3 (1998): Volume 46 – Regular number 3 – September 1998; 633–641 Revista de Biología Tropical; Vol. 46 Núm. 3 (1998): Volumen 46 – Volumen regular 3 – Setiembre 1998; 633–641 Revista Biología Tropical; Vol. 46 N.º 3 (1998): Volume 46 – Regular number 3 – September 1998; 633–641 2215-2075 0034-7744 10.15517/rbt.v46i3 spa https://revistas.ucr.ac.cr/index.php/rbt/article/view/20124/20325 Copyright (c) 1998 Revista de Biología Tropical http://creativecommons.org/licenses/by/4.0 |
| institution |
Universidad de Costa Rica |
| collection |
Revista de Biología Tropical |
| language |
spa |
| format |
Online |
| author |
Farfán, Claudia Espinoza Peralta, Ana María Tapia V ázquez, Olivia |
| spellingShingle |
Farfán, Claudia Espinoza Peralta, Ana María Tapia V ázquez, Olivia Dilación del desove de Modiolus capax(Bivalvia: Mytilidae) |
| author_facet |
Farfán, Claudia Espinoza Peralta, Ana María Tapia V ázquez, Olivia |
| author_sort |
Farfán, Claudia |
| 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 |
| title |
Dilación del desove de Modiolus capax(Bivalvia: Mytilidae) |
| title_short |
Dilación del desove de Modiolus capax(Bivalvia: Mytilidae) |
| title_full |
Dilación del desove de Modiolus capax(Bivalvia: Mytilidae) |
| title_fullStr |
Dilación del desove de Modiolus capax(Bivalvia: Mytilidae) |
| title_full_unstemmed |
Dilación del desove de Modiolus capax(Bivalvia: Mytilidae) |
| title_sort |
dilación del desove de modiolus capax(bivalvia: mytilidae) |
| title_alt |
Dilación del desove de Modiolus capax (Bivalvia: Mytilidae) |
| publisher |
Universidad de Costa Rica |
| publishDate |
1998 |
| url |
https://revistas.ucr.ac.cr/index.php/rbt/article/view/20124 |
| work_keys_str_mv |
AT farfanclaudia dilaciondeldesovedemodioluscapaxbivalviamytilidae AT espinozaperaltaanamaria dilaciondeldesovedemodioluscapaxbivalviamytilidae AT tapiavazquezolivia dilaciondeldesovedemodioluscapaxbivalviamytilidae |
| _version_ |
1810114812631318528 |