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Habitat suitability index model and minimum habitat area estimation of young Procypris rabaudi (Tchang): A simulation experiment in laboratory.

FENG Xian-bin1,2, ZHU Yong-jiu1,3, LI Xi1,2, HE Yong-feng1, ZHAO Jian-hua1,2, YANG De-guo1,2,3   

  1. (1Ministry of Agriculture Key Laboratory of Freshwater Biodiversity Conservation, Yangtze River Fisheries Research Institute, Chinese Academy of Fisheries Science, Wuhan 430223, China; 2College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China; 3Freshwater Fisheries Research Center, Chinese Academy of Fisheries Science, Wuxi 214081, Jiangsu, China)
  • Online:2013-01-18 Published:2013-01-18

Abstract: Under the conditions of simulated micro-habitat in laboratory, and by using experimental ecological methods, this paper evaluated the suitability index (HSI) of young Procypris rabaudi for habitat factors (substrate, light intensity and water depth). The habitat suitability models of the young P. rabaudi were established, and the minimum habitat area of the young P. rabaudi was estimated. The young P. rabaudi preferred the habitats with the gravel diameter from 10 to 15 cm, light intensity from 0.2 to 1.8 lx, and water depth from 0 to 15 cm (distance from the bottom of the tank). The three suitability index models of the substrate, light intensity and water depth for the young P. rabaudi were SIS=1.7338e-0.997x(SIS is the suitability index of substrate, and x is the gravel diameter; R2=0.89, P<0.01), SIL=3.0121e-1.339x(SIL is the suitability index of light intensity, and x is the light intensity; R2=0.93,P<0.01), and SIW=2.4055e-1.245x(SIW is the suitability index of water depth, and x is the water depth; R2=0.97, P<0.01), respectively. Arithmetic mean model HSI=(SIS+SIL+SIW)/3 was most available for the estimation of the habitat suitability of young P. rabaudi. A total of seven groups of young P. rabaudi which established and maintained a relatively stable habitat area range were found. This habitat area ranged from 628 to 2015 cm2, with an average of 1114 cm2.