| 刘洋,陆化杰,赵思语,陈子越.2022.日本海舍氏贝乌贼内壳的生长特性.动物学杂志,57(3):392-400. |
| 日本海舍氏贝乌贼内壳的生长特性 |
| Growth Characteristics of Gladius of Berryteuthis magister shevtsovi in the Japan Sea |
| 投稿时间：2021-11-14 修订日期：2022-04-30 |
| DOI：10.13859/j.cjz.202203008 |
| 中文关键词: 舍氏贝乌贼 生长特性 内壳 性腺成熟度 |
| 英文关键词:Berryteuthis magister shevtsovi Growth characteristics Gladius Sex maturity |
| 基金项目:国家重点研发计划项目（No. 2019YFD090402），国家自然科学基金青年基金项目（No. 41506184） |
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| 中文摘要: |
| 内壳可完整记录头足类的生活信息，是研究头足类年龄与生长的良好载体。根据2018年12月中国鱿钓船在日本海采集的261尾舍氏贝乌贼（Berryteuthis magter shevtsovi）样本，研究了其内壳长、叶轴长与个体生长的关系，尾锥宽、翼部最大宽度与性腺成熟度的关系以及叶轴、翼部和尾锥的生长特性。结果显示，舍氏贝乌贼内壳长和叶轴长均与胴长具有线性关系（R2 > 0.76），与体重具有幂函数关系（R2 > 0.77）；尾锥宽和翼部最大宽度均在性腺成熟度达到Ⅲ期后增长明显。舍氏贝乌贼内壳叶轴和翼部生长速率基本相同，且远大于尾锥的生长速率。研究表明，舍氏贝乌贼内壳可用于分析个体生长，尤其在其胴体遭到损伤时更为重要，内壳宽度生长主要在个体性成熟之后。 |
| 英文摘要: |
| [Objectives] The growth of the gladius is irreversible throughout the entire life cycle, which can completely record the life information of cephalopod. It is a good material for the study of the age and growth of cephalopod. This study used the gladius to analyze the individual growth of Berryteuthis magister shevtsovi, and provided a research basis for the subsequent exploration of its migration route, stock assessment, and rational development and utilization [Methods] In December 2018, 261 samples of B. m. shevtsovi were collected in the Sea of Japan by the Chinese Jigging fishing fleets. Linear regression or power function regression was used to evaluate the relationships between gladius length, proostracum length and individual growth, and frequency analysis was used to study the relationship between greatest width of conus, greatest width of vanes and sex maturity. We also analyzed the growth characteristics between proostracum, vanes and conus, by the analysis of covariance to test whether there were significant differences in various parameters between males and females. [Results] The results showed that gladius length and proostracum length both had a linear relationship with mantle length (ML) (R2 > 0.76), and a power function relationship was best for the growth with body weight (BW) (R2 > 0.77) (Fig. 4, 5). Greatest width of conus and greatest width of vanes both showed a significant increase after sex maturity reaching stage III (Fig. 6, 7). For individuals at stage III, greatest width of conus was not less than 5 mm, and greatest width of vanes was not less than 6 mm. The coefficient of the linear relationship between the standardized vanes length and the standardized length of greatest width of proostracum was slightly less than “1”. The coefficient of the linear relationship between the standardized proostracum length and standardized conus length was much less than “1”. Moreover, the ratio of vanes length to the length of greatest width of proostracum and the ratio of conus length to proostracum length were all similar, about 0.77 and 0.27, respectively. This showed that the growth rate of proostracum and vanes of B. m. shevtsovi was basically the same, which was much faster than that of the conus. [Conclusion] The study show that it is feasible to use the gladius to analyze the individual growth of B. m. shevtsovi, especially when the body ia damaged, and the width of gladius grows mainly after the individual has matured. |
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