【摘要】 根据2008年5月、8月、11月和2009年2月在闽东北外海海域(26°00’～28°00’N、120°00’～125°30’E)开展的虾类资源调查资料,研究分析了该海域中华管鞭虾(Solenocera crassicornis)的数量分布及生物学特征。结果显示,中华管鞭虾在该调查海区分布范围较广,出现频率为31.9%,其渔获质量占虾类总渔获质量的9.8%,渔获质量平均密度指数为7.21 kg·km-2,5月、8月、11月和2月平均密度指数分别为1.45 kg·km-2、10.74 kg·km-2、12.79 kg·km-2和3.68 kg·km-2;其数量分布具有明显的季节性,以8月和11月数量为多,其渔获质量占年总渔获质量的83.0%,2月和5月数量较少;主要分布于调查海区80 m以内海域,80 m水深以外海域极少分布;渔获体长范围为36～126 mm,优势体长组为50～95 mm,占66.8%;雌虾个体明显大于雄性个体,雌虾平均体质量为7.3 g,雄虾平均体质量为3.4 g;雌雄性比为1∶0.47,雌性性腺成熟度以Ⅱ期和Ⅲ期为主,分别占44.3%和36.3%,生殖盛期为5～8月;不同季节和性别摄食强度没有明显差异,平均摄食等级1.45。更多还原

【Abstract】 In base of the survey data of shrimps in northeast Fujian outer-sea(26°00′~28°00′N,120°00′~125°30′E) in May,August,November of 2008 and February of 2009,we analyzed the quantitative distribution and biological characteristics of Solenocera crassicornis.The results show that S.crassicornis widely distributes with an occurrence frequency of 31.9%,and the ratio of its catch in total catch is 9.8%.The average density of resource is 7.21 kg·km-2(May: 34.7 kg·km-2,August: 13.8 kg·km-2,November: 4.55 kg·km-2,February: 2.89 kg·km-2).Significant seasonal difference is found in the distribution,especially high in August and November(83.0%),and low in February and May.S.crassicornis distributes most in the waters at depth of 80 m.The body length is 36~126 mm,and that of the dominant species is 50~95 mm(66.8%);the size of female(7.3 g) is obvious bigger than that of male(3.4 g) with the sex ratio of 1:0.47.The maturity stages for female is mainly at Ⅱ and Ⅲ,accounting for 44.3% and 36.3%,respectively;the peak period of reproduction is from May to August.No significant difference is found in feeding intensity among different seasons and between different sex.更多还原