不同盐度条件下大理石纹蟹的生长性能、蜕皮频率和甲壳颜色

Onur Karadal
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引用次数: 0

摘要

对大理石纹蟹(Pachygrapsus marmoratus Fabricius, 1787)的生长性能、蜕皮频率和甲壳颜色进行了研究。螃蟹采集自Urla, İzmir。实验在10 L塑料容器中进行,容器中装满了6 L盐度为5‰、15‰、25‰和35‰的海水。初始平均体重为0.78±0.03 g的大闸蟹10只,每箱3个重复。用商业饲料(46%蛋白质和18%脂肪)饲喂螃蟹,每天1次,持续12周。研究结束时,25‰组的最终平均体重(FMW)显著高于5‰和15‰组(P<0.05)。15‰和35‰组的特定生长率(SGR)和25‰组的饲料系数(FCR)显著高于5‰组(P<0.05)。25‰组的平均换羽频率显著高于5‰组(P<0.05)。5‰和15‰的最终轻度(L*)显著低于其首字母(P<0.05)。25‰组的最终红度(a*)在各试验组中最高(P<0.05)。25‰组的最终黄度(b*)显著高于5‰和15‰组(P<0.05)。根据试验结果,在弹珠蟹饲养条件下,建议盐度控制在25‰。需要进一步的研究来揭示该物种在海洋水族馆中的潜在特性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Growth performance, molting frequency and carapace coloration of marbled crab (Pachygrapsus marmoratus) in different salinity levels
This study was conducted to evaluate the parameters on growth performance, molting frequency and carapace coloration of marbled crab (Pachygrapsus marmoratus Fabricius, 1787). Crabs were collected from Urla, İzmir. The experiment was performed in 10 L plastic containers filled with 6 L of seawater at four different salinity levels (5‰, 15‰, 25‰ and 35‰). Ten crabs with an initial mean weight of 0.78±0.03 g were placed in each container with three replicates. Crabs were fed once a day with a commercial diet (46% protein and 18% lipid) for 12 weeks. At the end of the study, the final mean weight (FMW) of the 25‰ group was significantly higher than the 5‰ and 15‰ groups (P<0.05). Specific growth rates (SGR) of the 15‰ and the 35‰ groups and feed conversion ratio (FCR) of the 25‰ group were significantly higher than the 5‰ group (P<0.05). The mean molting frequency (MMF) of the 25‰ group was significantly higher than the 5‰ group (P<0.05). Final lightness (L*) of the 5‰ and 15‰ were significantly lower than their initials (P<0.05). Final redness (a*) of the 25‰ group was the highest among the experimental groups (P<0.05). Final yellowness (b*) of the 25‰ group was significantly higher than the 5‰ and 15‰ groups (P<0.05). According to the results, it is recommended to keep the salinity at 25‰ under marble crab rearing conditions. Further studies are needed to reveal the potential properties of this species in marine aquariums.
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