水生生物学报2018，Vol.42Issue(2)：240-249,10.DOI:10.7541/2018.030
洪泽湖大银鱼和太湖新银鱼的生长、死亡参数及资源利用状况
GROWTH, MORTALITY AND EVALUATION OF RESOURCE UTILIZATION FOR TWO SALANGIDAE,PROTOSALANX HYALOCRANIUS AND NEOSALANX TAIHUENSIS IN HONGZE LAKE
摘要
Abstract
Two Salangidae,Protosalanx hyalocranius(Abbott,1901)and Neosalanx taihuensis(Chen,1956)were sampled monthly from July 2015 to June 2016 in Hongze Lake. Catch per Unit Effort (CPUE) was estimated for these two species as the number of individuals or weight of each species collected per km2of water area; growth and morta-lity parameters were estimated for both populations. The equilibrium output model was used to evaluate the approp-riate onset timing of fishing to achieve the highest yield per-recruitment and to establish an optimized fishery manage-ment scheme. The spawner biomass per-recruitment (SBR) model was constructed to assess the fishing effects under two different fishery management schemes, the current one and the optimized one based on the equilibrium output model.Ranges of the body length and body weight for P.hyalocranius were 20.39-182.68 mm and 0.10-34.79 g,respec-tively; this fish had two rapid growth periods, from April to June and from August to November; the most fitted growth function was the von Bertalanffy equation,Lt=173.35×[1-e-1.972(t-0.092)];fishing mortality and natural mortality coeffi-cients for the population were estimated as 8.583/year and 3.292/year, respectively. Ranges of the body length and body weight for N.taihuensis were 20.4-82.7 mm and 0.04-3.40 g,respectively;this fish showed a relatively constant growth rate from April through November; the most fitted growth function was the Logistic equation, Lt=66.82/[1+e-5.386(t-0.124)];fishing mortality and natural mortality coefficients for the populations were estimated as 7.006/year and 1.146/year, respectively. The current fishing management protocol on Salangidae in Hongze Lake has a banned fishing season between January 1 and August 8. Fishing is open for one week in mid-May. The equilibrium out-put model showed that the sum of yield per-recruitment for both species could reach the highest value when the banned fishing season is extended for 20 days, with the closure of one week fishing period in May and the onset of fishing period on August 29.Results of the SBR model showed that the SBR residues for P.hyalocranius were 20.23% and 36.72% of the unexploited state under the current protocol and the adjusted protocol,respectively,and those for N.taihuensis were 7.50% and 12.86%, respectively. In conclusion, the adjusted management protocol could effectively reduce fishing pressure for P.hyalocranius,but not for N.taihuensis.关键词
银鱼/生长/死亡/平衡产量模型/SBR模型/评价/洪泽湖Key words
Salangidae/Growth/Mortality/Equilibrium output model/SBR/Evaluation/Hongze Lake分类
农业科技引用本文复制引用
赵丽爽,程飞,张磊,王欣,张胜宇,蒋功成,谢松光..洪泽湖大银鱼和太湖新银鱼的生长、死亡参数及资源利用状况[J].水生生物学报,2018,42(2):240-249,10.基金项目
江苏省自然科学基金面上项目(BK20141268) （BK20141268）
中国科学院特色研究所服务项目(Y55Z06) （Y55Z06）
中国科学院前沿科学重点研究项目(QYZDB-SSW-SMC041) （QYZDB-SSW-SMC041）
江苏省区域现代农业与环境保护协同创新中心项目(HSXT215)资助[Supported by the Natural Science Foundation of Jiangsu Province,China(BK20141268) （HSXT215）
the Service Project of Special Institute of Chinese Academy of Sciences(Y55Z06) （Y55Z06）
the Key Project in Frontier Science of Chinese Academy of Sciences(QYZDB-SSW-SMC041) （QYZDB-SSW-SMC041）
the Scientific Funds of Jiangsu Collaborative Innovation Center of Regional Modern Agriculture and Environmental Protection Project(HSXT215)] （HSXT215）
