摘要
本文研究了福建东山岛附近海域斑生物量、密度的分布及其季节变化；生长和死亡特点；摄食和生殖习性。其平均月生物量为２２２．１ｋｇ／ｋｍ２，占游泳生物月总生物量的２７．２２％，成为优势种；生物量和密度冬季最高，分别为５２４．９ｋｇ／ｋｍ２和９３３２尾／ｋｍ２，比最低的春季高２２．７７倍和８６．２１倍。分布区域性差异明显，东山湾内高达４３８．２ｋｇ／ｋｍ２和７４０５尾／ｋｍ２，比湾外高７７．７１倍和６８．３８倍；渔获由０～Ⅳ龄组构成，ｌ龄组为优势，叉长分布范围为１１１～２２３ｍｍ，以１４１～１６０ｍｍ组为优势；食料以硅藻类的菱形藻、海线藻、圆筛藻、直链藻和骨条藻的数量最多，并大量摄食有机碎屑；初次性成熟的最小年龄为１龄．最小叉长雌性为１４６ｍｍ，雄性１４０ｍｍ。雌雄性均在１５１～１７０ｍｍ组成熟，生殖期在冬季至初春；生长参数为Ｌ∞＝２４６．３７ｍｍ，Ｗ∞＝１８２．６５ｇ，ｋ＝０．４３０３，ｔｏ＝－０．８６４９，体重生长拐点年龄人ｔｒ＝１．６０１７龄；瞬时总死亡率为１．２０１６。
A study was made on the distribution and seasonal variation in biomass and density, the characteristics in growth and death, and the behaviors in feeding and reporduction of Clu-panodon punctatus in the waters of Dongshan Island, Fujian Province. it was found to have a monthly mean biomass of 222. 21 kg/km2, representing 27. 22% of the monthly total biomass of necton in that area and making it become a dominant species. its biomass and density were found to be lowest in spring but highest in winter(524. 9 kg/m2 and 9332 Ind/km2,re-spectively), i. e.,they in winter being 23. 77 times and 87. 21 times, respectively, those in spring. The horizontal distributions of biomass and density had obvious regional variation. They were 438. 2 kg/km2 and 7405 ind/km2, respectively,inside the Dongshan Bay that were 78. 71 times and 69. 38 times, respectively,those outside the Bay. the caught fish population consisted of 5 age classes (0～IV ),with class I being dominant. The fork length of the fish population ranged from 111～223 mm, with 141～160 mm being predominant. The living food organisms included mostly Nitzshohia, Thalassionema, Coscinodiscus, Melosira and Skele-tonema Of Bacillariophyta, in addition to a large amount of organic detritus ingested. The first minimum age for sex maturity was class I. The minimum fork length was 140 mm for male and 146 mm for female. The matured female and male were largely in 151 to 170 mm group. From winter to early spring was the main spawning period. The parameters of growth were: L∞ = 246. 37 mm, W∞= 182. 65 g, k= 0. 4303, to= 0.8649, the age of the turnning point of body weight growth was 1. 6017 year(tr). The instantaneous rates of total mortality,natu-ral mortalily and fishing mortality were found to be 1. 2016, 0. 7702 and 0. 4314. The rate of development was 0. 3590. There remains much potential for expoitation.
出处
《生态学报》
CAS
CSCD
北大核心
1996年第4期375-382,共8页
Acta Ecologica Sinica
关键词
鲱形目
斑Ji
种群生态
东山岛海域
Clupanodon punctatus, population ecology, living parameters, waters of Dongshan Island
