[Effects of environmental factors on catch variation of main species of stow net fisheries in East China Sea].
Stow net fishery is one of the important fishing methods in the East China Sea. This paper used the generalized additive models (GAMs) to quantitatively describe the relationships between stow net catch and environmental factors (sea surface temperature SST, water depth, fishing position and tide) in the East China Sea. The results indicated that each factor had its own nonlinear effect on the catch per unit effort (CPUE) of haitail (Trichiurus japonicus), small yellow croaker (Larimichthys polyactis) and butter fish (Pampus spp.), and SST and water depth were the key factors. The GAMs' fitting results showed that SST had the strongest effect on the catch per unit effort of haitail, and water depth had the second one. The effects of fishing location and tide were very small. Water depth was the most influential variable when adjusted for the effects on small yellow croaker. SST, fishing location and tide had similar effects. Meanwhile, water depth and SST were the key factors affecting the catch per unit effort of butter fish. They had similar intensity.
Zhou
Sufang
S
Key Laboratory of Marine and Estuarine Fisheries, Ministry of Agriculture, East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China. dhyqzh@public4.sta.net.cn
Fan
Wei
W
Cui
Xuesen
X
Cheng
Yanhong
Y
D002681:China; D017753:Ecosystem; D004777:Environment; D005398:Fisheries / Q000379:methods* / Q000706:statistics & numerical data; D008962:Models, Theoretical; D009792:Oceans and Seas; D017747:Seafood / Q000706:statistics & numerical data*; D013696:Temperature