摘要
2010年3月至2011年2月逐月采集荣成俚岛近海的743尾斑头鱼（Hexagrammos agrammus）,探讨其摄食生态特征。结果表明,斑头鱼为底栖生物食性鱼类,摄食的饵料生物包括11个类群,主要摄食多毛类（Polychaeta）,其次是鱼卵、海藻类、海草类、口足类（Stomatopoda）、端足类（Amphipoda）和鱼类等。食物组成随季节和体长而变化：除四季均大量摄食多毛类以外,春季还摄食口足类和虾类,夏季还摄食鱼类和蟹类,秋季还摄食鱼卵和鱼类,冬季摄食鱼卵比例最高；体长〈80 mm的斑头鱼喜食海草和海藻等植物性饵料,体长80~199 mm的个体喜食多毛类、鱼类和虾蟹类等,体长〉199 mm 的个体主要摄食鱼类、多毛类和鱼卵等。摄食强度也随季节和体长而变化：夏季摄食强度最高,春季和秋季次之,冬季最低（不停食）；体长〈100 mm的个体摄食强度最高,随着体长增加而逐渐下降,体长〉180 mm以上的个体又随体长和年龄的增大而逐渐升高。对斑头鱼5个饵料生物样品进行了DNA条形码鉴定,其中4个饵料生物样品鉴定到种,1个饵料生物样品鉴定到属。结论认为,斑头鱼的摄食习性会随季节、个体生长和栖息海域饵料生物的种类和丰度的不同而发生变化。
The feeding ecology of Hexagrammos agrammus was investigated for 743 individuals collected monthly from the Lidao Rongcheng shore reef （March 2010 and February 2011）. The main results of this study are as follows. H. agrammus, a demersal-feeding fish, had 11 prey groups with polychaeta dominating. Prey groups also included fish eggs, algae, seagrass, stomatopoda, amphipoda and other fish. The dietary composition of the prey consumed had obvi-ous seasonal variations. While polychaeta was an important prey group across all seasons, stomatopoda and decapoda were predominant in spring, fish and crabs in summer, fish eggs and fish in autumn, while fish eggs were eaten mostly in winter. The dietary composition also had obvious ontogenetic variations： 〈80 mm SL （standard length） consumed seagrass and algae, 80–199 mm SL consumed polychaeta, fish, decapoda and crabs, while〉199 mm SL consumed fish, polychaeta and fish eggs. The feeding intensity had obvious seasonal variations, being highest in summer and lowest in winter. The feeding intensity also had obvious ontogenetic variations, reaching the highest feeding intensity in〈100 mm SL, then decreasing with increasing standard length, and gradually increasing after〉180 mm SL. Five samples could be identified by DNA barcoding, among which, four were identified at species level and one at genus level. Therefore, the feeding habits of H. agrammus display seasonal and ontogenetic variations, along with variations in species consump-tion and abundance.
出处
《中国水产科学》
CAS
CSCD
北大核心
2015年第1期88-98,共11页
Journal of Fishery Sciences of China
基金
国家海洋公益性行业科研专项经费项目(201305043
201405010)
关键词
斑头鱼
摄食生态
胃含物分析
DNA条形码
荣成俚岛
Hexagrammos agrammus
feeding ecology
stomach contents analysis
DNA barcoding
Lidao Rong-cheng
