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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/25594

Title: Reproductive biology of thornfish Terapon jarbua from the southwestern waters off Taiwan
Authors: Li-Mei Chang;Shoou-Jeng Joung;Chuen-Chi Wu;Wei-Cheng Su;Long-Jing Wu
Contributors: NTOU:Department of Environmental Biology and Fisheries Science
Keywords: Taiwan;Terapon jarbua;reproductive biology;fecundity;batch fecundity
Date: 2008-12-01
Issue Date: 2011-10-20T08:24:40Z
Publisher: Journal of the Fisheries Society of Taiwan
Abstract: abstract:Reproductive biology of the thornfish, Terapon jarbua was described based on 1,250 specimens caught by otter trawlers in the southwestern waters off Taiwan. These fish were purchased from fish markets at Tungkang and Linyuan from May 2002 to May 2003. Macroscopic appearance of the ovary, gonad somatic index, oocyte diameter frequency distribution and histological examination suggested that the spawning season of the thornfish in southwestern Taiwan waters runs from February to July. Eight stages of oocyte development were determined based on histological examination of ovary sections. Macroscopic observations of gonad showed five stages of ovarian development; immature, early maturing, late maturing, mature and spent and three testes stages. The sex ratio of 0.44 was not significantly different from 0.5 by using X^2 test, but the number of females was greater than that of males when fork length (FL) was greater than 180 mm. The males were dominant in the smaller size. The relationships between fecundity (F), batch fecundity (BF), and body weight (BW) were estimated to be F=-83.51+1.7365BW (r^2=0.73, n=131, P<0.05) and BF=1.2586+0.0528BW (r^2=0.49, n=31, P<0.05), respectively. Mean fecundity and mean batch fecundity (±SE) were estimated to be 143,596±88,338 and 1,016±576, respectively. Size at 50% maturity estimated by the logistic model were 159 mm FL and 163 mm FL for both females and males, respectively.
摘要:本研究探討台灣西南海域花身雞魚(Terapon jarbua)之生殖生物學。所使用樣本係由2002年5月至2003年5月問,按月至屏東縣東港及高雄縣林園魚市場採集自拖網漁船漁獲物,所採樣本總計1,250尾。以卵巢外觀肉眼觀察、組織切片、卵徑及生殖腺指數(GS/)月別變化,推估本種雌魚產卵季節在2-7月間。卵細胞發育過程經組織切片觀察可分為八個階段。卵巢經肉眼觀察可分為五個發育時期,即未熟期、成熟前期、成熟後期、成熟期及產後期。精巢則可分為三個發育階段。總性比為0.44,經卡方檢定(Chi-square test)雖顯示雌雄間無顯著差異,不過體長180mm以上個體則明顯雌魚數目大於雄魚,體型較小個體則以雄魚佔多數。平均總孕卵數(F)、平均單次產卵數(BF)與體重(BW)間的關係表示如下:F=-83.51+1.7365BW(r^2=0.73, n=131, P<0.05);BF=1.2586+0.0528BW(r^2=0.49, n=31, P<0.05)。平均總孕卵數及平均單次產卵數分別為143,596±88,338顆及1,016±576顆,性成熟體長(L50)經邏輯曲線求得雌雄分別為159mm及163mm。
Relation: 35(4), pp.335-350
URI: http://ntour.ntou.edu.tw/handle/987654321/25594
Appears in Collections:[環境生物與漁業科學學系] 期刊論文

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