| 陈炫妤,陆化杰,王洪浩,何静茹,刘凯,陈新军.2020.西北印度洋鸢乌贼角质颚色素沉积特性分析.动物学杂志,55(4):468-476. |
| 西北印度洋鸢乌贼角质颚色素沉积特性分析 |
| Analysis of Pigmentation Character on Beak for Sthenoteuthis oualaniensis in Northwest Indian Ocean |
| 投稿时间：2019-11-24 修订日期：2020-06-26 |
| DOI：10.13859/j.cjz.202004008 |
| 中文关键词: 鸢乌贼 角质颚 色素沉积 外部形态参数 西北印度洋 |
| 英文关键词:Sthenoteuthis oualaniensis Beak Pigmentation stage Morphological parameters Northwest Indian Ocean |
| 基金项目:国家重点研发计划项目（No. 2019YFD0901404和2019YFD090402），国家自然科学青年基金项目（No. NSFC 41506184）和浙江省科学技术厅2018年度重点研发计划项目（No. 2018C02026） |
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| 中文摘要: |
| 角质颚是头足类主要的摄食器官，蕴含着大量渔业生态学信息。根据2019年3至5月中国灯光罩网渔船在西北印度洋海域采集的1 009尾鸢乌贼（Sthenoteuthis oualaniensis）样本，对其角质颚色素沉积等级进行了划分和判定，分析了色素沉积等级与胴长、体重、性腺成熟度和角质颚形态参数的关系。结果显示，3至5月西北印度洋鸢乌贼角质颚色素沉积等级以2级为主，占总样本的33.87%，色素沉积等级总体上随着月份的增加而增加。鸢乌贼角质颚的色素沉积与胴长、体重和性腺成熟度的关系均存在性别间显著性差异（P < 0.05），总体而言雌性个体的沉积速度快于雄性个体。角质颚色素沉积等级与胴长、体重和角质颚外部形态参数均呈正相关，并且都随着性腺成熟度的增加而增加。本研究开展了西北印度洋鸢乌贼角质颚色素沉积研究，确立了鸢乌贼色素沉积等级与胴长、体重、性腺成熟度和角质颚形态参数的关系，并拟合了相关生长方程，为进一步研究鸢乌贼的渔业生态学及合理开发该资源提供了科学依据。 |
| 英文摘要: |
| The beak was the main feeding organ of cephalopods which contained abundant information of fishery biology and ecology. Based on the 1 009 Purple-back Flying Squid (Sthenoteuthis oualaniensis) samples which collected by Chinese lighting falling-net vessel in the northwest Indian Ocean from March to May 2019, the beak pigmentation was divided and determined. SPSS was used to conduct the ANCOVA test to determine whether gender studies were needed. The relationships between the beak pigmentation and the mantle length (L), body weight (W), sexual maturity and the external morphological parameters of the beak were analyzed by generating a box graph, the median values of the samples were fitted linearly. The results showed that the stage 2 was the dominant portion, accounting for 33.87% of the total samples during March to May, and the level of pigmentation stage increased with the time passed from March to May. There were significantly sexual differences in the relationships between beak pigmentation and mantle length, body weight, the external morphological parameters and sexual maturity (P < 0.05). The relationships between beak pigmentation and mantle length, body weight, the external morphological parameters of the beak (lower hood length, lower rostrum length, lower lateral wall length, lower wing length) were significantly relevant. The correlation coefficients (R2) between pigmentation stage and mantle length, body weight were 0.877 8, 0.863 5, 0.730 4 and 0.842 4 (Fig. 4). Under the same pigmentation stage, the range of mantle length and body weight of the males was smaller than that of females, indicating that females developed pigmentation faster than males. The minimum correlation coefficients (R2) between pigmentation stage and the external morphological parameters of the beak was 0.66 (Fig. 5) and his is higher than other cephalopods. The beak pigmentation stage increased with the increasing of sexual maturity (Table. 1). This study provides a basis for the fishery ecology research, effective exploitation and scientific management of S. oualaniensis resource based on the beaks. |
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