九龙江口鳔亚科两种鱼类生长和死亡参数的估算

基于2010年9月—2013年5月连续33个月份在九龙江口紫泥、岛美、浮宫3个站位流刺网和定置网调查采集的样本，对斑鲦和花鲦的生长和死亡特性进行了初步研究，并利用单位补充量产量模型对斑鲦和花鲦渔业的开发状态进行了评估．结果表明：1）斑鲦的体长分布范围为29．0—190．30删，平均为103．54mm；体重分布范围为0．30～121．20g，平均为19．88g．VonBertalanffy生长参数L∞=204．75nlin，K=0．36，t0=-0．45a，总死亡系数、自然死亡系数和捕捞死亡系数分别为1．14、0．46842和0．67158；渔业生物学参考点F0.1和Fmax分别为0．64752和0．74556．2）花鲦的体长分布范围为42．00—143．00min，平均为89．26mm；体重分布范围为1．00—43．85g，平均为11．32g．其生长参数L∞、K和to分别为152．25mm、0．32和-0．55a,总死亡系数、自然死亡系数和捕捞死亡系数分别为1．54、0．47105和1．06895；渔业生物学参考点F0.1和Fmax；分别为1．16578和1．32132．通过YPR模型分析得出：斑鳔资源处于过度捕捞状态，花鲦资源尚未过度利用．

Estimation of Growth and Mortality Parameters of the Two Dorosomatinae Fishes in Jiulong River Estuary

Study of the growth and mortality of the Konosirus punctatus have been primarily conducted on the commercial samples caught by gill nets and elver nets in the Doumei, Zini and Fugong of Jiulong River Estuary during 33 consecutive months between September 2010 and May 2013, and the status of the Konosirus punctatus has been evaluated using the yield per recruitment model. The results indicate the length of Konosi- rus punctatus ranges from 29. 0 mm to 190. 30 mm with an average length of 103.54 ram; the weight is be- tween 0. 30 g and 121.20 g with an average weight of 19. 88 g. The estimated parameters for the Von Berta- lanffy growth function of the stock are L∞ = 204. 75 mm, K = O. 36 and to = - 0. 45a respectively. The instan- taneous rates of total mortality, natural mortality and fishing mortality are 1.14, 0. 468 42 and 0. 671 58, re-spectively. The fishery biological reference points F0 land Fmax are respectively 0. 647 52 and 0. 745 56. The length of Clupanodon thrissa ranges from 42. O0 mm to 143.00 mm, with an average length of 89.26 mm; the weight is between 1.00 g and 43.85 g, with an average weight of 11.32 g. The estimated parameters for Von Bertalanffy growth function of the stock are L∞= 152. 25 mm, K = 0. 32 and to = - 0. 55a respectively. The instantaneous rates of total mortality, natural mortality and fishing mortality are 1.54, 0. 471 05 and 1. 068 95, respectively. The fishery biological reference points F0 land Fmax are 1. 165 78 and 1. 321 32, re- spectively. The Konosirus punctatus stock has been overfished shile the Clupanodon thrissa stock has not.