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참돔(Pagrus major) 알의 수정, 부화 및 부화 자어의 기형률에 미치는 산란 시기의 영향

Effect of the Spawning Period on Fertilization and Hatching of Egg and Deformity of Hatched Larvae in Red Seabream Pagrus major

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참고문헌

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주제분류수산학

초록

This study aimed to investigate the effect of five different spawning periods [from March 31 to April 9 (SP1), April 10 to 19 (SP2), April 20 to 29 (SP3), April 30 to May 9 (SP4), and May 10 to 19 (SP5), 2024] on the egg fertilization and hatching rates and the deformity rate of hatched larvae of red seabream Pagrus major broodstock (mean weight ♀ 2,211.9 g, ♂ 2,060.6 g) from 14.8 to 17.2°C. Eggs produced in SP1 under conditions below 16.0°C exhibited lower fertilization rates (71.5%), hatching rates (70.8%), and survival rates (51.3%) compared to those of SP2, SP3, SP4, and SP5. The diameters of egg and oil globules in SP4 and SP5 were higher than those of SP1, SP2, and SP3. However, larvae deformity rates are not affected by spawning periods. These results indicated that eggs produced in SP4 and SP5 maintained over 16°C were well in various indices and suitable for commercial aquaculture under our experimental conditions. This study provides valuable insights for managing seed production of red seabream in commercial hatchery.

Abstract

This study aimed to investigate the effect of five different spawning periods [from March 31 to April 9 (SP1), April 10 to 19 (SP2), April 20 to 29 (SP3), April 30 to May 9 (SP4), and May 10 to 19 (SP5), 2024] on the egg fertilization and hatching rates and the deformity rate of hatched larvae of red seabream Pagrus major broodstock (mean weight ♀ 2,211.9 g, ♂ 2,060.6 g) from 14.8 to 17.2°C. Eggs produced in SP1 under conditions below 16.0°C exhibited lower fertilization rates (71.5%), hatching rates (70.8%), and survival rates (51.3%) compared to those of SP2, SP3, SP4, and SP5. The diameters of egg and oil globules in SP4 and SP5 were higher than those of SP1, SP2, and SP3. However, larvae deformity rates are not affected by spawning periods. These results indicated that eggs produced in SP4 and SP5 maintained over 16°C were well in various indices and suitable for commercial aquaculture under our experimental conditions. This study provides valuable insights for managing seed production of red seabream in commercial hatchery.

참고문헌 (41)

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