水生生物学报2025，Vol.49Issue(11)：10-17,8.DOI:10.3724/1000-3207.2025.2025.0104
圆吻凡鲻仔鱼阶段生长发育对耳石次生核形成日龄及数量的影响
INFLUENCES OF LARVAL GROWTH AND DEVELOPMENT ON THE AGE AND NUMBER OF SECONDARY PRIMORDIA FORMATION IN SAGITTAL OTOLITH OF MOOLGARDA SEHELI
摘要
Abstract
The bluespot mullet(Moolgarda seheli)is an economically important species in China's coastal waters.To investigate the otolith microstructure characteristics and explore their relationships with key developmental events during early growth stages,we analyzed larval and juvenile M.seheli specimens collected from the surf zones of Gaolong Bay,Wenchang City,Hainan Island,from June to October 2021,along with their sagittal otoliths.Results showed that the hatching dates of the collected individuals ranged from April 16 to September 19,2021,with a peak occurring between June and August.The larval growth rate(b)was 0.2003±0.0362,ranging from 0.1404 to 0.3332.The first secondary primordium(SP)formed at(20.3±3.8)days post-hatching(range:12-30 days),corresponding to a standard length of(16.92±1.79)mm,ranging from 13.07 to 21.41 mm.Individual sagittal otoliths contained(2.9±1.6)SPs,ranging from 0 to 7.Our findings revealed that larvae with higher growth rates initiated SP formation earlier and deve-loped more SPs.The initial formation of SP appears to coincide with a significant developmental event,potentially marking the transition from the larval to juvenile stage.As a widely distributed and commercially important species in nearshore habitats,these results enhance our understanding of the growth and developmental dynamics of larval and juvenile M.seheli,providing valuable insights for future research on their reproductive biology,nursery habitats,and population recruitment processes.关键词
矢耳石微结构/次生核/早期生活史事件/圆吻凡鲻/仔稚鱼Key words
Sagittaes otolith microstructure/Secondary primordium/Early life history events/Moolgarda seheli/Larvae and juveniles分类
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李潭栋,夏文彤,苗中博,陆颖,胡锦辉,谢松光..圆吻凡鲻仔鱼阶段生长发育对耳石次生核形成日龄及数量的影响[J].水生生物学报,2025,49(11):10-17,8.基金项目
国家重点研发计划(2024YFD2401801) （2024YFD2401801）
国家自然科学基金(42166004和42376114) （42166004和42376114）
海南省自然科学基金(322CXTD507和322QN227) （322CXTD507和322QN227）
海南省重点研发(ZDYF2024SHFZ070)资助[Supported by the National Key R&D Program of China(2024YFD2401801) （ZDYF2024SHFZ070）
National Natural Science Foundation of China(42166004 and 42376114) （42166004 and 42376114）
Natural Science Foundation of Hainan Province of China(322CXTD507 and 322QN227) （322CXTD507 and 322QN227）
Key R&D Program of Hainan Province(ZDYF2024SHFZ070)] （ZDYF2024SHFZ070）
