闽东北外海假长缝拟对虾时空分布和生物学特性

The Space and Time Distribution and Biological Characteristics of Parapenaeus fissuroides in the Northeast Fujian Outer-sea

根据1998年5月～1999年2月在闽东北外海26°00’～28°00’N，125°30’E以西海域的虾类资源调查资料，分析了假长缝拟对虾（Parapenaeus fissuroides）的数量时空分布和生物学特性。结果表明：假长缝拟对虾平均资源密度指数以春季最高，达3．52ks／h，秋季、冬季和夏季均较低，分别为2．00ks／h、1．86kg／h和1．75kg／h。密集区主要分布在26°30’～28°00’N，121°30’～124°00’E，水深80～100m一带海域，26°30’以南资源密度较低。假长缝拟对虾体长分布范围为55～121mm，平均体长为82．3mm，雌性个体平均体长84．9mm，雄性为78．6mm，雌性个体明显大于雄性个体。雌性初次性成熟个体最小体长为83mm，体重为5．5g，大量性成熟体长范围为91～110mm，体重范围为8．0～12．0g。目前该海域假长缝拟对虾资源尚具一定利用潜力。

According to the shrimp resources investigation data in the northeast Fujian outersea （26°00＇ ～28°00＇N, 120°00＇ -125°30＇E） during May 1998 to February 1999, this paper analyzed the quantitative distribution and biological characteristics of Parapcnaeus fissuroides. The results showed that the average resources density is highest in Spring with 3.52kg/h, Autumn, Winter and Summer were lower which was 2.00 kg/h, 1.86 kg/h and 1.75 kg/h respectively. The biomass density is low in south of 26°30＇N , the high density occurs in the waters at depth of 80 to 100m （26°30＇～-28°00＇N, 121°30＇～124°00＇E）. The body length varied between 55 and 121 mm with average 82. 3mm, the average body length of female and male was 84. 9mm and 78. 6mm respectively, the female was obvious larger than the male. The body length and body weight of mature individuals of female for the first time were 83mm and 5.5g, and of great deal mature individuals it ranged from 91mm to llOmm and 8. 0 to 12. 0g. The resources has some potentiality to utilize now.