盐度、温度及光周期对海鱼养殖中活饲料南洋假虾产蛋的影响

IF 3.9 1区农林科学 Q1 FISHERIES

Aquaculture Pub Date : 2025-07-02 DOI:10.1016/j.aquaculture.2025.742921

Neethu Kuriakose , Imelda Joseph

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引用次数: 0

摘要

桡足类动物对海洋生态系统的维持至关重要，而南南达莱假蝶爪是鱼类幼虫的重要食物来源。本研究探讨了盐度、温度和光周期（光暗循环）在受控环境下对桡足动物生殖性状的影响。卵数在盐度为15 ppt时最高，平均为18.00±0.58枚，而在盐度为30 ppt时，卵数显著下降至9.33±0.33枚。卵囊尺寸和成年雌虫总长度在30ppt时最小。在不同的盐度中，10 ppt的时间最短，30 ppt的时间最长。温度也起了关键作用；离合器尺寸在28°C时最高，在25°C时最低，平均值为11.00±0.41。光周期对繁殖产量的影响有限，但在0 hL:24 hD光周期下观察到最高的卵窝数。结果表明，在盐度为15 ppt、温度为28°C、连续暗光周期（0 hL:24 hD）的条件下，楠楠达莱（p.a annandalei）的nauplii产量最高。在这些条件下，孵化率最高，突出了这些因素对这种桡足类物种有效繁殖的重要性。该研究为海洋生态学和水产养殖提供了有价值的见解，强调了环境条件在桡足动物繁殖中的重要性。

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Effects of salinity, temperature and photoperiod on egg production of Pseudodiaptomus annandalei (Copepoda: Calanoida) used as live feed in Mariculture

Copepods are essential for maintaining marine ecosystems, and nauplii of Pseudodiaptomus annandalei serves as a crucial food source for fish larvae. This study investigated how salinity, temperature, and photoperiod (Light: Dark cycle) affect the reproductive traits of this copepod in a controlled environment. Clutch size was highest at 15 ppt salinity, with an average of 18.00 ± 0.58 eggs, while it dropped significantly to 9.33 ± 0.33 at 30 ppt. The dimensions of egg sacs and the total length of adult females were also smallest at 30 ppt. Among different salinities, the shortest times to first and total maturity were recorded at 10 ppt, whereas the longest times occurred at 30 ppt. Temperature also played a critical role; clutch size peaked at 28 °C and was lowest at 25 °C, with an average of 11.00 ± 0.41. Photoperiod had a limited impact on reproductive output, but the highest clutch size was observed in a 0 hL:24 hD light cycle. The findings suggest that optimal conditions for maximizing nauplii production in P. annandalei are a salinity of 15 ppt, a temperature of 28 °C, and a continuous dark photoperiod (0 hL:24 hD). Under these conditions, the highest hatching percentage was achieved, highlighting the importance of these factors for effective breeding in this copepod species. This research provides valuable insights for marine ecology and aquaculture, emphasizing the significance of environmental conditions in copepod reproduction.

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来源期刊

Aquaculture 农林科学-海洋与淡水生物学

CiteScore

8.60

自引率

17.80%

发文量

1246

审稿时长

56 days

期刊介绍： Aquaculture is an international journal for the exploration, improvement and management of all freshwater and marine food resources. It publishes novel and innovative research of world-wide interest on farming of aquatic organisms, which includes finfish, mollusks, crustaceans and aquatic plants for human consumption. Research on ornamentals is not a focus of the Journal. Aquaculture only publishes papers with a clear relevance to improving aquaculture practices or a potential application.