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首页> 外文期刊>Marine ecology progress series >Determining the age and growth of wild octopus using stylet increment analysis
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Determining the age and growth of wild octopus using stylet increment analysis

机译：使用探针增量分析确定野生章鱼的年龄和生长

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摘要

Stylet increment analysis is a method of octopus age estimation that quantifies growth rings within stylets (reduced internal shells found in the mantle). This method was applied to wild Octopus pallidus to determine gender and seasonal influences on age and growth. A total of 503 individuals (94 males and 409 females) were aged, revealing that O. pallidus can reach a maximum age of approximately 1.6 yr and that spawning occurs throughout the year. Male octopuses on average were significantly larger (550 and 482 g for males and females, respectively) and older (259 and 243 d for males and females, respectively) than female, and overall growth rates were positively correlated with temperature at hatching. However, these differences were secondary to individual growth heterogeneity. Growth of males ranged from 1.32 to 5.33% body weight (bw) d~(-1) and females from 1.55 to 6.9% bw d~(-1), with no relationship between age and size evident regardless of sex. Stylet increment analysis is a promising technique that could play a role similar role to statoliths in squid as an ageing tool.
机译：探针增量分析是一种章鱼年龄估计方法，可量化探针内部的生长环（在套层中发现的减少的内壳）。该方法应用于野生章鱼，以确定性别和季节对年龄和生长的影响。总共503个个体（94例男性和409例女性）年龄较大，这表明苍鹭O.pallidus可以达到的最大年龄约为1.6岁，并且全年都会产卵。平均而言，男性章鱼比女性大得多（分别为雄性和雌性分别为550和482 g）和年龄较大（雄性和雌性分别为259和243 d），并且总体生长速率与孵化时的温度呈正相关。但是，这些差异是个体生长异质性的次要原因。雄性的生长范围为1.32％至5.33％（体重）d〜（-1），雌性的生长范围为1.55％至6.9％bw.d〜（-1），无论性别，年龄和大小均无明显关系。探针增量分析是一种有前途的技术，可以起到与鱿鱼中的石笋作为老化工具相似的作用。

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