Based on data collected from bottom trawl surveys in Haizhou Bay and the adjacent areas during March, May, July, September and December in 2011, the population parameters of five major fish species (Amblychaeturich-thys hexanema, Callionymus kitaharae, Cynoglossus lighti, Enedrias fangi and Collichthys lucidus) were analyzed. The results indicated that E. fangi had the highest growth coefficient (k) (0.76), followed by A. hexanema (0.70). The k val-ues for the other three fish species were less than 0.6. The highest total mortality coefficient(Z) was found for E. fangi(4.62), followed by C. lighti(3.53), A. hexanema (2.99) and C. lucidus(2.99). C. kitaharae(1.60) had the lowest Z value. C. lighti, E. fangi and C. lucidus had the highest exploitation rates(E), followed by A. hexanema. The E values for these four species were 0.74, 0.74, 0.73 and 0.60, respectively. However, the lowest E value was 0.43 for C. kitaharae. C. lighti, E. fangi and C. lucidus had higher L50(length at first capture) values(145.2, 107.1 and 98.7 mm, respectively). However, A. hexanema and C. kitaharae had lower L50 values(60.0 and 48.4 mm, respectively). The growth perform-ance indexes (φ′) for C. lucidus and E. fangi in different areas had relatively higher values in the lower latitude areas.%根据2011年3月、5月、7月、9月和12月在海州湾及其邻近海域进行的5个航次底拖网调查资料,对5种主要鱼类[包括六丝钝尾虾虎鱼(Amblychaeturichthys hexanema)、短鳍(Callionymus kitaharae)、长吻红舌鳎(Cynoglossus lighti)鳚、方氏云(Enedrias fangi)和棘头梅童鱼(Collichthys lucidus)]的种群参数进行了估算。结果表明,在这5种鱼类中,生长系数(k)鳚最高的是方氏云(0.76),其次是六丝钝尾虾虎鱼(0.70),其他3种鱼类的生长系数均小于0.60；总死亡系数(Z)鳚最高的鱼种是方氏云(4.62),其次是长吻红舌鳎(3.55)、六丝钝尾虾虎鱼(2.99)和棘头梅童鱼(2.99),短鳍的总死亡率最低(1.60)；长吻红舌鳚鳎、方氏云和棘头梅童鱼的开发率(E)最高,分别为0.74、0.74和0.73,此外,六丝钝尾虾虎鱼的开发率也较高(E=0.60),而仅有短鳍的开发率较低(E=0.43)；长吻红舌鳎、方氏云鳚和棘头梅童鱼的平均选择体长(L50)较大,分别为145.2、107.1和98.7 mm,而六丝钝尾虾虎鱼和短鳍的平均选择体长较小,分别为60.0 mm和48.4 mm；鳚通过计算方氏云和棘头梅童鱼2种鱼类的生长表现指数(φ′),并与其他学者的研究结果相比较,发现同一鱼种的生长表现指数随着栖息海域纬度的降低而呈上升趋势。
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