Estimation of Growth Parameters of Two Species of Mackerel, Scomber japonicus and S. australasicus, in the Coastal Waters of Taiwan

臺灣近海白腹鯖及花腹鯖生長參數的估算

伯馬可(Marco A. Bolanos) ； 曾萬年(Wann-Nian Tzeng)

《臺灣水產學會刊》 21卷4期 (1994/12) Pp. 313-321

https://doi.org/10.29822/JFST.199412.0002

摘要

本研究係根據1981～86年大型圍網船於臺灣東北部澎佳嶼至釣魚島附近海域所捕獲的白腹鯖及花腹鯖的體長頻度分佈資料，利用ELEFAN（電腦體長頻度分析）程式推算von Bertalanffy季節性振盪生長方程式之參數，以瞭解其生長特性。白腹鯖的生長參數估算結果爲：極限體長(L(下标 ∞))=41.07cm，生長係數(K)=0.49year^(-1)，體長爲零的理論年齡(t0)=-0.3，季節性生長振盪係數(C)=0.7，生長最低點的月份(WP)=0.30。在花腹鯖的情形：L(下标 ∞)=44.95cm，K=0.71 year^(-1)，t0 =-0.2，C=0.7，WP=0.28。C值很大，顯示兩種魚有極明顯的季節性振盪的生長現象。生長停滯期爲二月中至三月初，此與生活史之越冬產卵期極爲吻合。花腹鯖的極限體長和生長係數皆比白腹鯖者大，顯示臺灣近海比較適合花腹鯖的生長。

關鍵字

白腹鯖 ； 花腹鯖 ； 電腦體長頻度分析 ； 季節性振蕩的生長 ； 臺灣近海

並列摘要

The scasonal oscillating von Bertalanffy growth equation of Scomber japonicus and S. australasicus was simulated with ELEFAN (Electronic LEngth Frequency ANalysis) technique, based on the length-frequency data collected from the large purse seiners in the waters off northeastern Taiwan, 1981-1986. The growth parameters of S. japonicus were estimated to be L(subscript ∞)=41.07cm, K=0.49 year^(-1), t0=-0.3, C(seasonal oscillation amplitude)=0.7 and WP(winter point)=0.30; while those of S. australasicus estimated to be L(subscript ∞)=44.95cm, K=0.71 year^(-1), t0=-0.2, C=0.7 and WP=0.28. The great C-value indicated that both species display strong seasonal growth oscillation. The lowest growth period of the year was from mid February through early March (WP=0.28 and 0.30), which corresponds to the over wintering and spawning season of the fish's life history. Both L(subscript ∞) and K indicated that the coastal waters of Taiwan was more suitable for the growth of Scomber australasicus than S. japonicus.

並列關鍵字

Mackerel ； Scomber japonicus ； S. australasieus ； Electronic length frequency analysis (ELEFAN) ； Seasonal growth oscillation ； Taiwan