Omni-Akuatika
Vol 15, No 1 (2019): Omni-Akuatika May

Sex Ratio and Growth Pattern of Coconut Crabs Birgus latro (Crustacea, Decapoda, Cianobitidae) in North Moluccas Province, Indonesia

Rugaya Serosero (Khairun University)
Sulistiono Sulistiono (Department of Aquatic Resources Management, Faculty of Fisheries and Marine Science, Bogor Agricultural University, IPB Darmaga Campus. Bogor 16680, West Java, Indonesia.)
Nurlisa A. Butet (Department of Aquatic Resources Management, Faculty of Fisheries and Marine Science, Bogor Agricultural University, IPB Darmaga Campus. Bogor 16680, West Java, Indonesia.)
Etty Riani (Department of Aquatic Resources Management, Faculty of Fisheries and Marine Science, Bogor Agricultural University, IPB Darmaga Campus. Bogor 16680, West Java, Indonesia)

Article Info

Publish Date
02 May 2019

Abstract

Coconut crab (Birgus latro) is a crustacean that has a large size until four kilograms. The study  aimed to analyze sex ratio and growth pattern including the relationship of thorax length - body weight, thorax width - body weight and cephalothorax length plus rostrum - body weight in Daeo (Morotai Island), Laigoma (South Halmahera District) and Fitako (North Halmahera District). The sex ratio was determined using χ2 test and the growth pattern was tested by the b value through t test. The results showed sex ratio of 1: 0.9 in Daeo (n = 581), 1: 0.6 in Laigoma (n = 24), and 1: 2 in Fitako (n = 31). The relationship of thorax length, thorax width and cephalothorax length plus rostrum with body weight were strongly correlated (R2> 70%). The growth pattern of coconut crab in Daeo was negative allometric, while in Laigoma and Fitako were negative allometric and isometric.

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Journal Info
Omni-Akuatika
Website

Abbrev

joa

Publisher

Universitas Jenderal Soedirman

Subject

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science

Description

OmniAquatika is a scholarly refereed research journal which aims to promote the theory and practice, innovation, engineering and management as well as social-economic relevant in fisheries and marine sciences fields. The main aspects of research areas include, but are not exclusive to the current ...