Descripción del desarrollo ontogénico y el crecimiento de la corvina aguada, Cynoscion squamipinnis (Sciaenidae) para la optimización de su cultivo
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Fecha
2015
Autores
Barquero Chanto, Juan Esteban
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Universidad Nacional (Costa Rica)
Resumen
Se estudió el desarrollo ontogénico y el crecimiento de la corvina aguada (Cynoscion squamipinnis) (Sciaenidae), durante un desove espontáneo ocurrido en el Laboratorio de Cultivo y Reproducción de Peces Marinos de la Estación de Biología Marina Juan Bertoglia Richards de la Universidad Nacional en Puntarenas, Costa Rica. Las condiciones de oxígeno disuelto (6.56±0.99 mg VI ), salinidad (3.5+-1.4%) y temperatura (27.48±O.340C), no variaron significativamente
(p>0.05). El diámetro del huevo fue de 0.852±0.039 mm, con una gota de lípidos de 0.269±0.016 mm. En el desarrollo embrionario, se observaron las primeras cinco divisiones celulares, la mórula (3:30 horas después del desove (hdd)), la blástula (4:30 hdd), la gástrula (8:30 hdd), la forma C (10:00 hdd), y la forma S (12:00 hdd). La eclosión ocurrió 19 hdd, y la larva midió 2.234±0.122 mm de longitud total (LT) y 2.179±0.1 19 mm de longitud notocordial (LN). La larva inició el proceso de preflexión 49 hdd, el de flexión I I días después del desove (ddd) (3.767±0.209 mm LT), y el de postflexión a los 14 ddd (4.015±0.302 mm). A los 45 ddd, los juveniles completaron su escamado, pesando 3.68±1.09 g. Con los juveniles obtenidos se realizó un engorde que duró 355 días, pesando al inicio 3.77±1.15 g, y al final 132.60±32.96 g, con un peso mínimo de 78.5 g y uno máximo de 219.3 g. La tasa de crecimiento (TC) fue de 0.36 g d-l , la tasa específica de crecimiento (TEC) fue de 1% g d-l , y la tasa de crecimiento relativo (TCR) fue de 0.043 g g-l d Los tiempos de formación en las etapas embrionarias de la corvina aguada (C. squamipinnis), difirieron de los tiempos observados para otras especies de corvinas. El tiempo de eclosión de las larvas de la corvina aguada (C. squamipinnis), fue menor al observado para otras especies de corvina. Se determinaron diferencias en los tiempos de aparición de las características distintivas durante el desarrollo embrionario y larval de la corvina aguada (C. squamipinnis) con respecto a otras especies, las cuales probablemente responden a las características genéticas propias de cada especie y a la temperatura de incubación de los huevos. La tasa de crecimiento observada en la corvina aguada (C. squamipinnis), demuestra que esta especie tiene potencial para su cultivo con fines comerciales. Se recomienda realizar estudios sobre los parámetros físico-químicos del agua y su relación con la supervivencia y crecimiento, para determinar las condiciones óptimas para el levantamiento larval.
The ontogenetic development and growth of the watery croaker (Cynoscion squamipinnis) (Sciaenidae) was studied during a spontaneous spawning that occurred in the Marine Fish Culture and Reproduction Laboratory of the Juan Bertoglia Richards Marine Biology Station of the National University in Puntarenas. , Costa Rica. The dissolved oxygen (6.56±0.99 mg VI ), salinity (3.5+-1.4%) and temperature (27.48±0.340C) conditions did not vary significantly. (p>0.05). Egg diameter was 0.852±0.039 mm, with a lipid drop of 0.269±0.016 mm. In embryonic development, the first five cell divisions were observed, the morula (3:30 hours after spawning (hdd)), the blastula (4:30 hdd), the gastrula (8:30 hdd), the C form ( 10:00 hdd), and form S (12:00 hdd). Hatching occurred 19 hdd, and the larva measured 2.234 ± 0.122 mm in total length (TL) and 2.179 ± 0.1 19 mm in notochordial length (LN). The larva began the preflexion process 49 dad, the flexion process I I days after spawning (dad) (3.767±0.209 mm TL), and the postflexion process at 14 dad (4.015±0.302 mm). At 45 dad, the juveniles completed their scaling, weighing 3.68±1.09 g. The juveniles obtained were fattened for 355 days, weighing 3.77±1.15 g at the beginning, and 132.60±32.96 g at the end, with a minimum weight of 78.5 g and a maximum of 219.3 g. The growth rate (TC) was 0.36 g d-l , the specific growth rate (TEC) was 1% g d-l , and the relative growth rate (TCR) was 0.043 g g-l d The formation times in the stages embryonic times of the watery croaker (C. squamipinnis) differed from the times observed for other croaker species. The hatching time of the larvae of the watery croaker (C. squamipinnis) was shorter than that observed for other croaker species. Differences were determined in the appearance times of the distinctive characteristics during the embryonic and larval development of the watery croaker (C. squamipinnis) with respect to other species, which probably respond to the genetic characteristics of each species and the incubation temperature. of the eggs. The growth rate observed in the watery croaker (C. squamipinnis) shows that this species has the potential to be cultured for commercial purposes. It is recommended to carry out studies on the physical-chemical parameters of the water and its relationship with survival and growth, to determine the optimal conditions for larval rearing.
The ontogenetic development and growth of the watery croaker (Cynoscion squamipinnis) (Sciaenidae) was studied during a spontaneous spawning that occurred in the Marine Fish Culture and Reproduction Laboratory of the Juan Bertoglia Richards Marine Biology Station of the National University in Puntarenas. , Costa Rica. The dissolved oxygen (6.56±0.99 mg VI ), salinity (3.5+-1.4%) and temperature (27.48±0.340C) conditions did not vary significantly. (p>0.05). Egg diameter was 0.852±0.039 mm, with a lipid drop of 0.269±0.016 mm. In embryonic development, the first five cell divisions were observed, the morula (3:30 hours after spawning (hdd)), the blastula (4:30 hdd), the gastrula (8:30 hdd), the C form ( 10:00 hdd), and form S (12:00 hdd). Hatching occurred 19 hdd, and the larva measured 2.234 ± 0.122 mm in total length (TL) and 2.179 ± 0.1 19 mm in notochordial length (LN). The larva began the preflexion process 49 dad, the flexion process I I days after spawning (dad) (3.767±0.209 mm TL), and the postflexion process at 14 dad (4.015±0.302 mm). At 45 dad, the juveniles completed their scaling, weighing 3.68±1.09 g. The juveniles obtained were fattened for 355 days, weighing 3.77±1.15 g at the beginning, and 132.60±32.96 g at the end, with a minimum weight of 78.5 g and a maximum of 219.3 g. The growth rate (TC) was 0.36 g d-l , the specific growth rate (TEC) was 1% g d-l , and the relative growth rate (TCR) was 0.043 g g-l d The formation times in the stages embryonic times of the watery croaker (C. squamipinnis) differed from the times observed for other croaker species. The hatching time of the larvae of the watery croaker (C. squamipinnis) was shorter than that observed for other croaker species. Differences were determined in the appearance times of the distinctive characteristics during the embryonic and larval development of the watery croaker (C. squamipinnis) with respect to other species, which probably respond to the genetic characteristics of each species and the incubation temperature. of the eggs. The growth rate observed in the watery croaker (C. squamipinnis) shows that this species has the potential to be cultured for commercial purposes. It is recommended to carry out studies on the physical-chemical parameters of the water and its relationship with survival and growth, to determine the optimal conditions for larval rearing.
Descripción
Barquero Chanto, J. E. (2015). Descripción del desarrollo ontogénico y el crecimiento de la corvina aguada, Cynoscion squamipinnis (Sciaenidae) para la optimización de su cultivo. [Tesis de Licenciatura]. Universidad Nacional, Heredia, C.R.
Palabras clave
REPRODUCCION ANIMAL, ANIMAL REPRODUCTION, PECES MARINOS, MARINE FISH, DESARROLLO EMBRIONARIO, CORVINA, LARVAS, DESARROLLO BIOLOGICO