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Issue:ISSN 1000-7083
          CN 51-1193/Q
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Your Position :Home->Past Journals Catalog->2020 Vol.39 No.1

Food Composition, Feeding Strategy and Nutrition Conditions of Mosquitofish Larvae and Young Fish During Early Stage of Their Population Foundation
Author of the article:JIN Jinjin1,2, CHEN Guozhu1,2*, XIAO Qiaozhi1,2, CHEN Lijuan1,2, QIU Yuping1,2
Author's Workplace:1. National Positioning Research Station for Dianchi Wetland Ecosystem, Southwest Forestry University, Kunming 650224, China;
2. College of Wetlands/National Plateau Wetland Research Center, Southwest Forestry University, Kunming 650224, China
Key Words:Gambusia affinis; larvae and young fish; feeding; nutrition condition; biological invasion
Abstract:Starvation is considered to be the main factor that affects the survival of fish larvae during the early life stage. The ability of invasive fish larvae in overcoming the starvation stress has significant importance to the population invasion success of fish species. In this paper, food composition, feeding strategy and nutrition conditions of mosquitofish (Gambusia affinis) larvae and young fish were investigated in a newly invaded population around Dianchi Lake basin, Kunming city, China. The results showed that the fish larvae and young fish mainly fed on cladocera and copepod, and also consumed other food resources including water insect larvae and collembolan. Therefore, the fish larvae were revealed to be general feeders, and food diversity index of many individuals was bigger than 1. These were closely related to the large mouth gap and well-development characteristics in the starvation period. However, 73.27% of the larvae were still found to be undergoing starvation. Characteristics of foundation population, food competition in fish larvae, behavior of larvae and food resource fragmentation are considered to be the main causes for the mosquitofish larvae starvation. Finally, the conditions of feeding and nutrition of larvae may profoundly affect the colonization of mosquitofish which deserve further investigation.
2020,39(1): 23-33 收稿日期:2019-03-04
分類號:Q959.4
基金項目:云南省教育廳科學研究基金研究生項目(2018Y123);云南省科技計劃農業聯合面上項目[2017FG001(-066)];國家自然科學青年基金項目(31400477);西南林業大學高原濕地科學云南省創新團隊項目(2012HC007)
作者簡介:金錦錦(1992-),女,碩士研究生,研究方向:魚類入侵生態學研究,E-mail:[email protected]
*通信作者:陳國柱,E-mail:[email protected]
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