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唐富江, 刘伟, 王继隆, 李哲, 谢松光. 2013: 兴凯湖大银鱼食物组成与食性转化. 动物学研究, 34(5): 493-498. DOI: 10.11813/j.issn.0254-5853.2013.5.0493
引用本文: 唐富江, 刘伟, 王继隆, 李哲, 谢松光. 2013: 兴凯湖大银鱼食物组成与食性转化. 动物学研究, 34(5): 493-498. DOI: 10.11813/j.issn.0254-5853.2013.5.0493
Fu-Jiang TANG, Wei LIU, Ji-Long WANG, Zhe LI, Song-Guang XIE. 2013: Diet composition and transition of clearhead icefish(Protosalanx hyalocranius)in Lake Xingkai. Zoological Research, 34(5): 493-498. DOI: 10.11813/j.issn.0254-5853.2013.5.0493
Citation: Fu-Jiang TANG, Wei LIU, Ji-Long WANG, Zhe LI, Song-Guang XIE. 2013: Diet composition and transition of clearhead icefish(Protosalanx hyalocranius)in Lake Xingkai. Zoological Research, 34(5): 493-498. DOI: 10.11813/j.issn.0254-5853.2013.5.0493

兴凯湖大银鱼食物组成与食性转化

Diet composition and transition of clearhead icefish(Protosalanx hyalocranius)in Lake Xingkai

  • 摘要: 该文于2010年6月—2011年1月逐月分析中俄界湖兴凯湖外来种大银鱼食性,结果发现,大银鱼主要摄食枝角类、桡足类、虾类和鱼类。6月份大银鱼体长<60 mm,以枝角类和桡足类为食,7月份体长>60 mm群组、8月份体长>80 mm群组、9月份体长>100 mm群组与10月及之后体长>120 mm群组等的食谱中均出现鱼类,且优势种类为大银鱼和属鱼类。该摄食鱼类的大银鱼最小体长随季节而增加的现象,与饵料鱼类生长导致的食物资源可得性变动密切相关。

     

    Abstract: Diet compositions of alien clearhead icefish(Protosalanx hyalocranius)in Lake Xingkai were investigated monthly from June 2010 through January 2011. Protosalanx hyalocranius preyed mainly on cladoceran, copepoda, shrimp, and larvae or juvenile fish. In June, P. Hyalocranius were smaller than 60 mm standard length(SL), and their diets were composed of zooplankton only. In July, fish began to appear infrequently in the diet of P. Hyalocranius larger than 60 mm SL, and by August fish was occurring in the diets of P. hyalocranius larger than 80 mm, 100 mm in September, and 120 mm in October and thereafter, respectively. The increase in the minimum SL of P. hyalocranius preying on fish within a given season reflects changes in resource availability, largely attributed to the corresponding increase in prey fish size as seasons progress. Protosalanx hyalocranius and Hemiculter sp. were the dominant prey fish in the diets of P. hyalocranius.

     

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