Studies on the body length-weight relationship of Neocaridina gracilipoda under the Qingcaihe Reservoir Dam in Guizhou Province
Neocaridina gracilipoda is one of the common freshwater shrimps in China and plays an important role in aquatic ecosystems,e.g.in linking matter cycling and energy flow,but there are few reports on its basic biological as-pects.In light of that,by collecting 490 individuals under the Qingcaihe Reservoir Dam(106°07′52″E,27°36′12″N)in the autumn of 2022 and measuring the body length(L)and weight(W),we obtained L and W distribution of this shrimp and reported for the first time the L-W relationship of this species.The results were as follows:(1)L range was 10.60-32.13 mm(19.67±2.54 mm),while the dominant L range was 16.50-22.50 mm(n=390,accounting for 79.56％of the total abundance);(2)W range was 0.01-0.44 g(0.11±0.04 g),while the dominant W range was 0.05-0.15 mm(n=415,84.69％of the total abundance);(3)L-W relationship was expressed in the equation W=4 X 10-5L2.66(R2=0.78,n=490),and there was a significant difference(P＜0.05)between the value of b(b=2.66)and 3,indicating that this species under the Qingcaihe Reservoir Dam exhibited negative allometric growth.
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