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首页> 外文期刊>Marine ecology >The effect of temperature and salinity on survival and growth of Crangon uritai (Decapoda: Crangonidae) larvae reared in the laboratory
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The effect of temperature and salinity on survival and growth of Crangon uritai (Decapoda: Crangonidae) larvae reared in the laboratory

机译：温度和盐度对实验室饲养的乌rang（Crangon uritai）（十足目：Crangonidae）幼虫存活和生长的影响

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摘要

Larvae of the decapod Crangon uritai were reared in the laboratory in a factorial experiment employing three temperatures (9, 12 and 15℃) and three salinities (29 per thousand, 32 per thousand and 35 per thousand) from hatching to the post-larval stage. The effects of temperature and salinity on survival, intermolt period (IP) and molt increment (MI) were investigated. Larvae from one brood were subdivided into groups of 20 and reared in glass bowls containing filtered sea-water at a number of temperature-salinity combinations. The reared larvae were transferred daily to the clean bowls prepared with newly hatched Anemia nauplii, and number of molts and mortality within each bowl were recorded. The zoeal size (carapace length) was determined from exuvia and dead larvae, and the IP was also recorded. Larvae of C. uritai completed larval development only at 15℃ temperature. The first zoeal stage completed their development at all temperature-salinity combinations and exhibited the highest survival rate. IP at each stage increased with increasing size and greatly decreased with increasing temperature, and intermolt duration (range of days) increased with larval development especially at the lower temperature. Although the MI decreased with increasing size, it was little affected by temperature. This led to a better growth rate with increasing temperature.
机译：在孵化至幼虫后阶段，采用三个温度（9、12和15℃）和三个盐度（29 /千，32 /千和35 /千）的分解实验，在实验室中饲养了十足纲Crangon uritai的幼虫。 。研究了温度和盐度对存活率，蜕皮期（IP）和蜕皮增量（MI）的影响。将一个巢中的幼虫分为20组，并在玻璃碗中饲养，该碗中装有经过过滤的海水，并具有多种温度-盐度组合。每天将饲养的幼虫转移到准备有刚孵出的贫血无节幼体的干净碗中，并记录每个碗中的虫数量和死亡率。从粪便和死幼虫中确定动物的大小（甲壳的长度），并记录IP。乌里氏梭菌的幼虫仅在15℃的温度下才完成幼虫的发育。黄牛期的第一阶段在所有温度-盐度的组合下完成了它们的发育，并显示出最高的存活率。在每个阶段的IP随着大小的增加而增加，并且随着温度的升高而大大降低，并且随着幼虫的发展，尤其是在较低的温度下，互熔持续时间（天数）增加。尽管MI随着尺寸的增加而降低，但几乎不受温度的影响。随着温度的升高，这导致了更好的生长速率。

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