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首页> 外文期刊>Aquaculture International >Biological performance of red porgy (Pagrus pagrus) larvae under intensive rearing conditions with the use of an automated feeding system
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Biological performance of red porgy (Pagrus pagrus) larvae under intensive rearing conditions with the use of an automated feeding system

机译：使用自动饲养系统，在密集饲养条件下的红海豚（Pagrus pagrus）幼虫的生物学性能

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摘要

Pagrus pagrus is one of the promising species for the industry in the Mediterranean but its rearing is still far from satisfactory. In the present work, the conditions and results of larval rearing with the use of an automatic feeding system are presented. Eight populations were reared for 20 days with the 'pseudo green water' methodology in two successive trials. Larvae were fed enriched rotifers during the entire rearing period, a mixed diet of rotifers and Artemia (Instar I when larvae reached 5mm in length, replaced by Instar II after larvae reached 5.5 mm) and a formulated diet ( after day 16 post hatching). A computerized system for feeding management was used. A total of 388,000 eggs were incubated and after 20 days, 237,973 larvae (TL = 6.96 +/- 0.17 mm) were produced with a survival rate of 61.4 +/- 6.3%. Individuals grew in terms of wet weight with an exponential rate of 0.167 +/- 0.008 daily (R-2 = 0.983) with no variations between replicates. Mean individual daily consumption at first feeding (day 4-post hatching), was 0.20 +/- 0.06 mg of food (0.03 +/- 0.01 dry weight), that is, 180-300 rotifers, while on day 20, consumption increased by 10 (2.081 +/- 0.106 mg and 0.276 +/- 0.014 in wet and dry weight, respectively). When compared with sea bream, consumption was higher by approximately 3-4-fold. The mean food conversion ratio of the experimental period was 4. In comparison with sea bream larviculture, food consumption of red porgy is higher, and a different feeding strategy is required to satisfy the requirements of the larvae.
机译：帕格鲁斯（Pagrus）帕格鲁斯（Pagrus）是地中海渔业的有前途的物种之一，但其饲养情况仍远未令人满意。在目前的工作中，介绍了使用自动喂食系统进行幼体饲养的条件和结果。在两个连续的试验中，使用“伪绿水”方法将8个种群饲养了20天。在整个饲养期间，给幼虫喂食丰富的轮虫，混合食用轮虫和卤虫（幼虫长至5mm时为Instar I，幼虫长至5.5mm后为Instar II）和配方饮食（孵化后第16天后）。使用了计算机化的饲料管理系统。总共孵化了388,000个卵，在20天后，产生了237,973个幼虫（TL = 6.96 +/- 0.17 mm），存活率为61.4 +/- 6.3％。个体的湿重以每天0.167 +/- 0.008的指数速率增长（R-2 = 0.983），重复之间没有差异。第一次进食（孵化后第4天）的平均每日个人消费为0.20 +/- 0.06 mg的食物（0.03 +/- 0.01干重），即180-300轮虫，而在第20天，消费量增加了10（湿重和干重分别为2.081 +/- 0.106毫克和0.276 +/- 0.014）。与鲷鱼相比，食用量增加了约3-4倍。实验期间的平均食物转化率是4。与鲷鱼幼鱼相比，红豚鼠的食物消耗更高，并且需要不同的喂养策略来满足幼虫的需求。

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