摘要
角质颚是头足类重要的硬组织之一,经常被用于研究头足类的年龄与生长、种群结构和资源评估等。根据2019年3—5月中国灯光罩网渔船在西北印度洋调查生产期间采集的1009尾鸢乌贼样本,测量了260对鸢乌贼角质颚外部形态参数,结合日龄,对西北印度洋鸢乌贼角质颚的微结构及其外部形态生长特性进行了研究。结果显示,西北印度洋鸢乌贼角质颚上颚喙部截面有明显的生长纹,头盖区的生长纹较为清晰。协方差分析表明,角质颚外形特征参数、相对尺寸与日龄间均不存在性别间显著差异。赤池信息准则(AIC)显示,除上头盖长(UHL)外,所有外形特征参数与日龄的生长关系均以线性函数关系为最适,而UHL与日龄的关系则以对数函数为最适。所有特征参数的相对尺寸均随日龄的增加呈减小趋势,且变化趋势基本相同。6项外形特征参数的绝对生长率和相对生长率整体呈减小趋势,其中,上侧臂长(ULWL)和下翼长(LWL)的绝对生长率在181~210 d处达到峰值,而上脊突长(UCL)、UHL、下侧臂长(LLWL)和下脊突长(LCL)的绝对生长率在211~240 d处达到峰值,所有参数的相对生长率均在181~210 d处达到峰值。本研究为后续利用角质颚研究鸢乌贼的年龄生长、群体划分和生活史等渔业生物学奠定基础,为科学开发该资源提供依据。
Beak is one of the important hard tissues of Cephalopod,which is widely used for age and growth estimation,population structure analusis and resource assessment of Cephalopod.The microstructure and the morphological growth characteristics of beak of Sthenoteuthis oualaniensis were studied with morphometric parameters of 260 pairs of beaks from 1009 samples collected in Northwest Indian Ocean by a Chinese lighted cover net fishing vessel during survey from March to May 2019 in combination with their ages.The result indicated that there were obvious growth increments in the upper beak rostrum sagittal section(RSS),and increments in hood region were more clear.The analysis of covariance indicated that there was no significant difference between sex and age in the morphological growth characteristics parameters and relative size of beaks.The results of Akakchi Information Criterion(AIC)showed that the linear functions were found to be the optimal for the relationships between all the morphological characteristic parameters and age except UHL,and the logarithmic function was the optimal for UHL growth.The relative size decreased with the increase of age,and the variation trend was basically the same.The absolute and relative growth rates of the six morphological characteristic parameters showed a decreasing trend,and the absolute growth rate of ULWL and LWL reached the peak at 181-210 d but the absolute growth rates of UCL、UHL、LLWL and LCL reached to the peak at 211-240 d,while the instantaneous relative growth rates of all the parameters peaked at 181-210 d.This study laid a foundation for further study on the age and growth,population structure and life history of S.oualaniensis based on the microstructure of the beak,and provided a scientific basis for scientific exploitation of this resource.
作者
陆化杰
赵懋林
武孝慈
王洪浩
何静茹
陈新军
LU Huajie;ZHAO Maolin;WU Xiaoci;WANG Honghao;HE Jingru;CHEN Xinjun(College of Marine Sciences,Shanghai Ocean University Shanghai 201306,China;Key Laboratory of Marine Ecological Monitoring and Restoration Technologies,Shanghai Ocean University,Shanghai 201306,China;National Distant-water Fisheries Engineering Research Center,Shanghai Ocean University,Shanghai 201306,China;Scientific Observing and Experimental Station of Oceanic Fishery Resources,Ministry of Agriculture and Rural Affairs,Shanghai Ocean University,Shanghai 201306,China)
出处
《水产学报》
CAS
CSCD
北大核心
2023年第9期50-59,共10页
Journal of Fisheries of China
基金
国家重点研发计划(2019YFD090402)
国家自然科学基金(41506184,41876141)。
关键词
鸢乌贼
角质颚
微结构
生长率
西北印度洋
Sthenoteuthis oualaniensis
beak
microstructure
growth rate
Northwest Indian Ocean
