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Species composition and habitats of larval and juvenile fish in the shoreline waters of the middle reaches of Lijiang river
Received date: 2014-10-13
Revised date: 2015-05-11
Online published: 2015-11-15
Larval and juvenile fish samples were collected from shoreline and shallow waters of the middle reaches of Lijiang River in May, June, and July of 2014. Four habitat types (A: compound bank with grait and aquatic plants, B: natural bank with sand and aquatic plants, C: constructed bank with grait and aquatic plants, and D: constructed bank and graits without aquatic plants) were investigated. We collected a total of 5416 individuals of 11 species, belonging to 3 genera, 5 families, and 10 orders. β-Cody diversity index measurement matrix demonstrated that types A and B and type D are significantly different in species richness level. One-way ANOVA and LSD analysis showed that the species richness and abundance of larval and juvenile fish were significantly higher in types A and B than type D, and were similar in types A and B. Aquatic vegetation had a significant impact on species richness and bank type combined with aquatic plant had a significant impact on larval and juvenile fish abundance. However, sediment had no significant impact on abundance. In a word, restoration of riparian and aquatic vegetation is crucial to the maintenance of species richness and abundance of larval and juvenile fish.
Key words： larval and juvenile fish; species richness; abundance; habitat type
FENG Wenli , WU Zhiqiang , HUANG Liangliang , ZHU Zhaojun . Species composition and habitats of larval and juvenile fish in the shoreline waters of the middle reaches of Lijiang river[J]. Journal of University of Chinese Academy of Sciences, 2015 , 32(6) : 769 -774 . DOI: 10.7523/j.issn.2095-6134.2015.06.007
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