花身雞魚的耳石成長與生活履歷關系之研究

Correlation Between Otolith Growth and Life History of Thornfish Terapon Jarbua in the Waters Around the Thermal Effluent Outfall of the Kin-Shan Nuclear Power Plant,Taiwan

鄭豐洲(Feng-Chou Cheng) ； 張永明(Yeong-Ming Chang) ； 曾萬年(Wann-Nian Tzeng)

《臺灣水產學會刊》 23卷2期 (1996/06) Pp. 79-94

https://doi.org/10.29822/JFST.199606.0002

摘要

本研究的目的在於探討白鮻(Liza subviridis)之生殖特徵及其利用高雄港及其附近海域的情形，採樣時間是由民國83年4月至84年6月，採樣的地點包含仁愛河、高雄第一港口及西子灣。研究結果顯示絕大多數的白鮻都是在西子灣捕獲，共有398尾，在港內地區僅捕獲一尾，在這些標本中並發現有兩尾雌雄同體的個體。雌雄間的尾叉長(FL)和體重(BW)關係式無明顯差異，合併為log BW=-1.757+2.901 log FL。雌雄性比以雌魚居多，為2.2:1 。生殖腺指數及生殖腺成熟期的月別變化不大，推測可能為終年產卵的魚種。其產卵型式為分批同步成長。孕卵數介於6×10^(4)-19×10^(4)間（尾叉長14.7－18.5公分），尾叉長(FL)和孕卵數(F)的關係式為F=6.912 FL^(3.446)。最小成熟體長雌魚和雄魚分別為尾叉長12.5和11公分左右。白鮻的生殖特徵有地區性的差異。且由水質監測資料推測其對水質條件的忍受力可能較差，以致於無法利用河港區較為豐沛的食物，而僅生息在港外沿岸地區。

關鍵字

花身雞魚 ； 畸型魚 ； 耳石 ； 生長 ； 生活史

並列摘要

This study investigated the reproductive biology of Liza subviridis in the KaohsiungHarbor Area.Sampling were conducted monthly at Kaohsiung River(Jen-Ai River),Kaohsiung First Harbor and Hsi-Tsu-Wan from April 1994 to June 1995.Most of the samples were caught at Hsi-Tsu-Wan,except one caught in harbor area.Among the 398 samples two hermaphrodites with ovotestis were found.The relationshipsbetween fork length(FL)and body weight(BW)in male and female were not significantlydifferent.The pooled equation was log BW=-1.757+2.901 log FL.Sex ratio ofL.subviridis was female:male=2.2:1.The monthly variation of gonadosomatic indexshowed that the reproductive period was all year round except June.The spawning patternof L.subviridis was group synchrony.The fecundity were 6～19×10^(4)(FL=1.45－18.5 cm)and with the relationship of fork length and fecundity(F)as F=6.912FL^(3.446).The minimum size of maturity for female and male were 12.5 cm and 11.0cm in fork length,respectively.The reproductive characteristics of L.subviridis revealed significant geographicalvariation.According to the water quality data L.subviridis may have less toleranceto the polluted environment in the harbor area,so that although the food supply wasabundant in the harbor area,the fish were restricted in the nearby coastal area.

並列關鍵字

Thornfish ； Deformity ； Otolith ； Growth ； Life History