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首页> 外文期刊>Oceanographic Literature Review >Productivity of the calanoid copepod Acartia tropica in response to different salinities and multigenerational acclimatization
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Productivity of the calanoid copepod Acartia tropica in response to different salinities and multigenerational acclimatization

机译：Calanoid Copepod Acartia Tropica的生产率响应于不同的盐度和多级化适应性

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摘要

Copepods form the natural prey item for the vast majority of marine fish larvae in the wild. The tropical estuarine calanoid copepod Acartia tropica is a potential live feed for finfish larvicul-ture because of their higher fecundity and wide salinity tolerance. The present study was aimed at identifying the optimal salinity for obtaining maximum production of A. tropica nauplii. Population growth, intrinsic rate of population increase, egg production (eggs female~(-1) day~(-1)). egg hatching success (EHS) and nauplii survival (%) of A. tropica were assessed at different salinity levels. Similarly, the effect of long term acclimatization on population growth of A. tropica was also studied. The experimental salinity range was set to be 5-30 ppt based on the abrupt salinity change experiment. Highest mean population count (1265 ± 209) and intrinsic rate of population increase (0.493 ± 0.01) were recorded at 15 ppt which was significantly higher (p0.05) than other salinity treatments except for 20 ppt (1005 ± 129, 0.481 ± 0.01). The lowest mean population count and intrinsic rate of population increase were recorded at 30 ppt (80.75 ± 17.86, 0.32 ± 0.003). The highest mean daily egg production was recorded at 15 ppt (33.42 ± 5.88) which was significantly different (p0.05) from all other treatments. Nauplii survival at 15 ppt (79.73 ± 4.86) was significantly higher (p0.05) except for 20 ppt (73.81 ± 5.62). However different salinity conditions did not affect EHS and sex ratio of adults in the present study. Multigenerational acclimatization significantly improved the population growth and mean daily egg production of A. tropica at 30 ppt (558.30 ± 35, 25.80 ± 4.00). Hence the present study suggests that the salinity range of 15-20 ppt supports the maximum productivity of A. tropica and it can be well adapted to higher salinity conditions through multigenerational acclimatization.
机译：CopePods在野外的绝大多数海洋鱼类幼虫形成天然猎物。热带河口Calanoid Copepod Acartia Tropica是针对紫鱼幼虫的潜在的活饲料，因为它们的繁殖力较高，盐度宽度宽度。本研究旨在鉴定获得最大盐度的最佳盐度，以获得A.Tropica Nauplii的最大含量。人口增长，人口内在率增加，鸡蛋产量（鸡蛋雌〜（-1）天〜（-1））。在不同的盐度水平下评估卵孵化成功（EHS）和Nauplii存活率（％）。同样，还研究了长期适应于对Tropica人口生长的影响。基于突发的盐度变化实验，实验盐度范围设定为5-30 ppt。最高平均群体数量（1265±209）和群体内在速率增加（0.493±0.01），以15 ppt记录比20 ppt除外（P0.05）显着更高（P0.05）（1005±129,0.481±0.01 ）。在30 ppt（80.75±17.86,0.32±0.003）上记录最低平均种群数量和群体增加率。最高平均每日卵产量为15 ppt（33.42±5.88），其来自所有其他治疗的显着差异（p0.05）。除了20 ppt（73.81±5.62）外，Nauplii存活率在15 ppt（79.73±4.86）显着更高（p0.05）。然而，不同的盐度条件不会影响本研究中成年人的EHS和性别比例。多杀剂适应性明显改善了30 ppt的群体生长和平均每日卵产蛋生产（558.30±35,25.80±4.00）。因此，本研究表明，15-20ppt的盐度范围支持A.Tropica的最大生产率，并且通过多粒适应性化可以很好地适应良好的盐度条件。

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  • 来源
    《Oceanographic Literature Review》 |2020年第10期|2281-2281|共1页
  • 作者

    J.M. Wilson; B. Ignatius; P.B. Sawant;

  • 作者单位

    ICAR- Central Marine Fisheries Research Institute Kochi 682018 India;

    ICAR- Central Marine Fisheries Research Institute Kochi 682018 India;

    ICAR- Central Marine Fisheries Research Institute Kochi 682018 India;

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