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首页> 外文期刊>Aquaculture International >The effect of two different feeds on growth, carapace colour, maturation and mortality in marbled crayfish (Procambarus fallax f. virginalis)
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The effect of two different feeds on growth, carapace colour, maturation and mortality in marbled crayfish (Procambarus fallax f. virginalis)

机译：两种不同饲料对大理石小龙虾（Procambarus fallax f。virginalis）的生长，甲壳颜色，成熟度和死亡率的影响

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摘要

The effect of two different feeds (30 % protein common carp feed without astaxanthin and astaxanthin-rich discus feed with 20 % shrimps and 46 % protein) on growth, carapace colour, maturation and mortality in marbled crayfish (Procambarus fallax f. virginalis) was examined under laboratory conditions. Feeding trials were carried out during 123 days at room temperature in triplicate per treatment (45 crayfish per treatment, 15 crayfish per aquarium). At the end of the trial, crayfish fed with discus feed exhibited uniformly the same dark blue carapace colouration, while crayfish fed with carp feed exhibited significantly lighter and more variable colouration in shades of grey. Growth was significantly faster (P 0.001) among crayfish fed with higher protein content discus feed than among crayfish fed with lower protein content carp feed. Neither the effect of aquaria on growth nor the effect of feed on maturation and mortality were found to be significant (P > 0.05). Thus, our study showed that the type of feed had a significant impact on the growth and carapace colouration, but not on the maturation and mortality in the marbled crayfish.
机译：两种不同的饲料（不含虾青素的30％蛋白质普通鲤鱼饲料和含20％虾和46％蛋白质的富含虾青素的铁饼饲料）对大理石化小龙虾（Procambarus fallax f。virginalis）的生长，甲壳颜色，成熟度和死亡率的影响是在实验室条件下检查。每个处理一式三份，在室温下于123天进行喂养试验（每个处理45个小龙虾，每个水族馆15个小龙虾）。在试验结束时，用铁饼饲料喂养的小龙虾均匀地显示出相同的深蓝色甲壳颜色，而用鲤鱼饲料喂养的小龙虾则显示出明显的浅色和多变的灰色阴影。饲喂蛋白质含量较高的铁饼饲料的小龙虾的生长速度明显高于饲喂蛋白质含量较低的鲤鱼饲料的小龙虾的生长速度（P <0.001）。发现水族箱对生长的影响或饲料对成熟度和死亡率的影响均无显着性（P> 0.05）。因此，我们的研究表明，饲料的类型对大理石小龙虾的生长和甲壳的着色有显着影响，但对成熟度和死亡率没有影响。

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