摘要
为分析海洋环境变化对鱼类繁殖的影响,深入了解小黄鱼(Larimichthys polyactis)补充机制,本研究基于2015 年、2017 年、2018 年 5 月海州湾及其邻近海域产卵场调查数据,利用两阶段广义可加模型(two-stage Gener-alized Additive Model)研究了小黄鱼鱼卵分布与海洋环境因子之间的关系。结果显示小黄鱼鱼卵丰度的年际变化较大,鱼卵高丰度区集中分布在 33.5°N^34.5°N、水深 10~20 m 的近岸河口区。海水温度和盐度是影响小黄鱼鱼卵分布重要的因素。鱼卵集中分布区表层温度为 17℃,表层盐度为 29.5~30.5;底层温度为 16~18℃,底层盐度为 29。水温的年际变动也影响了小黄鱼鱼卵丰度,在水温较高的年份鱼卵丰度明显较高。本研究揭示了小黄鱼鱼卵的时空分布特征和环境因子之间的关系,为小黄鱼产卵场保护区、资源量化管理等措施提供科学依据。
The fish egg is the early stage in the fish life history, which influences the recruitment of the fish popu- lation. There are internal relationships between the distribution of eggs and environmental factors. In recent years, influenced by climate change and global warming, the growth and breeding habits of the small yellow croaker (Larimichthys polyactis) have changed. The spawning ground of the small yellow croaker has shifted. In addition, the range of the spawning ground of the small yellow croaker has extended to the open sea, and the distribution characteristics of temperature, salinity, and depth of spawning grounds have also greatly changed compared with that of the past. The goals of our study were to reveal the spatial and temporal distributional pattern of eggs of the small yellow croaker in Haizhou Bay and its adjacent waters, as well as determine the relationship between this distributional pattern and environmental variables. A two-stage GAM (two-stage Generalized Additive Model) is a flexible method for modeling zero-flatted data, which are typically found in the data collected from ichthyoplank- ton surveys. This method is to model the distribution of species in two steps, firstly modeling presence/absence data and secondly modeling density of presence observations. In this study, we conducted an ichthyoplankton survey of the small yellow croaker in Haizhou Bay and its adjacent waters during May in 2015, 2017, and 2018. Based on these data, the two-stage GAM between the distribution of small yellow croaker eggs and environmental factors was constructed. The results showed that the abundance of eggs of the small yellow croaker varied greatly among different years. The eggs were distributed in estuarine waters at depths of 10 20 m between 33.5°N and 34.5°N. Additionally, the temperature and salinity were important factors affecting eggs distribution of the small yellow croaker. The eggs were distributed in areas where the sea surface temperature was 17℃ and the sea surface salinity was between
作者
尹洁
王晶
张崇良
徐宾铎
薛莹
任一平
YIN Jie;WANG Jing;ZHANG Chongliang;XU Binduo;XUE Ying;REN Yiping(College of Fisheries, Ocean University of China, Qingdao 266003, China;Laboratory for Marine Fisheries and Food Production Processes, Qingdao National Laboratory for Marine science and technology, Qingdao 266237, China)
出处
《中国水产科学》
CAS
CSCD
北大核心
2019年第6期1164-1174,共11页
Journal of Fishery Sciences of China
基金
国家重点研发计划资助(2018YFD0900904)(2018YFD0900906)(2018YFD0900902)
关键词
小黄鱼
两阶段广义可加模型
早期补充
时空分布
环境因子
Larimichthys polyactis
two-stage GAM
supplementary mechanism
temporal and spatial distribution
environmental factors
