摘要
根据2013年10月–2014年2月在北太平洋海域(29°08′~41°08′N,163°50′~144°19′W)采集的364尾长鳍金枪鱼的卵巢样本,利用组织学分析,详细描述了长鳍金枪鱼卵巢、卵细胞的发育阶段。结果显示,北太平洋长鳍金枪鱼卵巢内同时存在不同时相的卵细胞,为分批产卵类型;组织学上,长鳍金枪鱼的卵细胞发育过程分为6个时相,卵巢发育过程分为6个时期;卵巢成熟指数在成熟期为Ⅰ~Ⅴ期时逐渐增大,在Ⅵ期时减小;北太平洋长鳍金枪鱼产卵高峰为12月中旬和1月初,其卵巢成熟指数随纬度的升高呈递减趋势,随经度变化规律不明显。研究表明,通过对北太平洋长鳍金枪鱼卵巢的发育特征的分析与探讨,可为北太平洋长鳍金枪鱼的资源状况评估及渔业可持续发展提供生物学信息。
Based on 364 ovarian samples of North Pacific albacore tuna（Thunnus alalunga） collected in the north Pacific waters（29°08’–41°08’ N, 163°50’–144°19’ W） from October 2013 to February 2014, using histological analysis, the present study describes oocyte and ovary developmental stage of albacore tuna. The results show that North Pacific albacore is a species of the batch spawning type due to different development stages of oocytes found in the same ovaries. Histologically, the oocyte development of North Pacific albacore can be divided into six phases, and ovarian development into six periods. GSI（gonad somatic index） increases with the mature period during the stages I–V, and decreases in the stage VI. The spawning peak is from the middle December to early January, the GSI increases with the decreasing of latitude but no significant difference can be found. The present study can provide biological information for the stock assessment and sustainable development of north Pacific albacore fisheries, by analyzing the growth characteristics of albacore ovaries.
出处
《水产学报》
CAS
CSCD
北大核心
2018年第3期345-355,共11页
Journal of Fisheries of China
基金
农业部渔业渔政管理局太平洋长鳍金枪鱼资源探捕项目(D-8006-13-8012)
农业部渔业局渔业观察员项目(D-8002-13-8005A)~~
关键词
长鳍金枪鱼
卵巢
发育特征
成熟指数
北太平洋
Thunnus alalunga
ovary
development characteristics
GSI（gonad somatic index）
North Pacific Ocean
