Recruitment and growth patterns of the portunid crab Charybdis bimaculata in Kagoshima Bay, southern Japan
Recruitment and growth patterns of the portunid crab Charybdis bimaculata in Kagoshima Bay, southern Japan
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日本南部鹿儿岛湾梭子蟹 Charybdis bimaculata 的补充和生长模式
DOI：
10.1007/s12562-022-01661-7
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发表时间：
2023
影响因子：
1.9
通讯作者：
Ohtomi Jun
中科院分区：
文献类型：
--
作者：
Nawer Fairuz;Doi Wataru;Ohtomi Jun
本文首次对深水双斑？的补充和生长规律进行了研究。鹿儿岛湾是一个半封闭的深水海湾，具有陡峭的斜坡，独特的火山口壁，C。bimaculatas优势十足类之一，并获得商业重要性。每月的长度频率的方法，从总共8265个人收集了三个研究期间-20世纪90年代，2010年代和2020年代-在中央盆地（174-229米深度）和一个研究期间20世纪90年代在通道区（122-136米深度）。甲壳宽度范围为9.5至42.7毫米的男性和9.5至35.0毫米的女性。总体性别比明显偏离1：1，有利于女性。据估计，招募发生在9月至11月之间，在这个海湾。补充似乎与产卵高峰期同步，时滞为2-4个月。通过von Bertalanffy生长函数对两种性别动物的生长进行了描述。生长方程显示，雄性比雌性具有更低的K值和更高的渐近大小。相同性别之间的生长参数的空间和时间比较发现，除了在一个案例中没有统计学差异。
We studied the recruitment and growth patterns of the portunid crabCharybdis bimaculatain deep water for the first time. The study area, Kagoshima Bay, is a semi-enclosed, deep-water bay characterized by steep slopes, with unique caldera walls whereC. bimaculatais one of the dominant decapods and acquiring commercial importance. The monthly length-frequency method was used from a total of 8265 individuals collected over a three study periods—1990s, 2010s, and 2020s—at the central basin (174–229 m depth) and one study period 1990s at the channel area (122–136 m depth). Carapace width ranged from 9.5 to 42.7 mm in males, and 9.5 to 35.0 mm in females. The overall sex ratio significantly deviated from 1:1 favoring females. Recruitment was estimated to occur between September to November in this bay. Recruitment seemed to be synchronized with the peak spawning season with a time lag of 2–4 months. Growth was appositely delineated by the von Bertalanffy growth function for both sexes. The growth equations revealed that males had lowerKvalues and higher asymptotic sizes than females. Spatial and temporal comparison in growth parameters between the same sexes found no statistical differences except in one case.