摘要
欧飘Pelecuscultratus（L）．和欧白鱼Alburnusalburnus（L）．是奥地利诺伊齐德勒湖敝水区的两优势种．本文研究了1994年6月至11月间欧飘和欧白鱼之间的食物资源分配．从6月到9月，欧飘和欧白鱼主食枝角类蒙古秀体Daiphanosomamongolianum和透明薄皮Leptodorakindti，生态位重叠度高．在10月和11月，欧飘主食烧足类刺北缥水Artodiaptomusspinosus和昆虫，而欧白鱼转移到主食昆虫，生态位重叠降低．食物分配明显．
Pelecus cultratus and Alburnus alburnus arc two dominant cyprinid fishes in the open lake of Neusicdler See (Austria). Food resource partioning between two species was studied through June to November, 1994. From Junc to Septcmber, Pelecus and Alburnus preferred cladocerans Diaphanosoma mongolianum and Leptodora kindti, resulting in a high degree of dietary overlap.In October and Novembcr, Pelecus fcd mainly on copepod Arctodiaptomus spinosus and insects drifting at the water surface, while Alburnus exclusively consumed lnsects, and the overlap be-came minimal. The observed changcs in the dict of and ovcrlap betwecn these specics were caused by seasonal varlatlon in food abundance and compositlon, combined with the divergence in forag-ing profitability of the fishes. Niche segregation was profound in lean-food scasons, and this may be a responsible process of the fishes coexistence.
出处
《湖泊科学》
EI
CAS
CSCD
1997年第1期71-74,共4页
Journal of Lake Sciences
基金
奥地利环境
青年与家庭部资助
关键词
欧飘
欧白鱼
食物资源分配
生态位重叠
Pelecus cultratus, Alburnus alburnus, resource partioning, niche overlap,species coexistence
