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Research Article Open access CC BY 4.0

Reproductive Biology of Land Crabs (Gecarcoidea lalandii) in Ly Son Island, Quang Ngai Province – Vietnam

Huynh Minh Sang, Le Thi Thu Thao, Ho Son Lam, Phan Minh-Thu

Annual Research & Review in Biology · pp. 111–120 · Published 17 Mar 2021

10.9734/arrb/2021/v36i130336

Abstract

The reproductive biology of the land crab Gecarcoidea lalandii was documented for the Ly Son Island, Quang Ngai Province, Vietnam. Approximately 30 crabs, collected every month in the 12-month period from August 2019 to July 2020, were analyzed gonadal development stages, sex ratio, spawning season, fecundity and size at first sexual maturity. Results showed that number of male and female crab in nature was not significantly different. Gonadal of the crab passed through five stages of maturation. The crab spawns continuously during the spawning season. In nature, the crab can mature whole year-round with a higher proportion from January to August and the peak maturation from June to July.  The spawning season is of this species is only on the raining period from June to July. Length at first sexual maturity of the crab was 53.91 mm of carapace width for female and 50.39 mm male crab. The absolute fecundity varied in 473,000-820,000 eggs ind-1 and highly related to body weight. The current findings provide the scientific foundation for fishery resource management and artificial breeding of the land crab in Ly Son.

Land crabs Gecarcoidea lalandii reproductive biology Ly Son Island length at first sexual maturity

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Cited by 1

Ảnh hưởng của mật độ nuôi, thức ăn lên tỷ lệ sống và tăng trưởng của cua dẹp Gecarcoidea lalandii, H. Milne Edwards, 1837, ở Lý Sơn, Tỉnh Quảng Ngãi

Minh Sang Huỳnh · Tạp chí Khoa học - Công nghệ Thủy Sản Trường Đại học Nha Trang · 2023

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