Length-Weight relationship, sex ratio and condition factor of blue swimming crab (Portunus pelagicus Linnaeus, 1758) from Java Sea Indonesia

Vella Rohmayani, Muhammad Reza Pahlevi, Bambang Irawan, Agoes Soegianto

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

8 Citations (Scopus)

Abstract

Few studies have been conducted concerning the crabs population from the Java Sea. The objective of the present study was to determine the length-weight relationship (LWR), sex ratio, and condition factors (K) of Portunus pelagicus from Java Sea Indonesia. The methods for this study were collecting of sample, estimating of carapace length-weight relationship, sex ratio and condition factor. Crab specimens were caught by local fisherman using crab traps during Nov 2016 to Jan 2017. Total length and body weight of crabs were measured to the nearest 0.01 cm and 0.01 g respectively. Male and female crabs were separated to calculate the sample size. The carapace length-weight relationship (LWR) was estimated using the log form of the allometric growth equation. Chi-square analyses were used to compare male and female ratio. The condition factor was calculated according to Fulton's method. The LWRs of males, females, and total individuals were W = 0.033L3.325, W = 0.041L3.183 and W = 0.039L3.222, respectively. The sex ratio of P. pelagicus was 1.45:1 (females/males), was significantly different from the expected 1:1 value. The condition factors for males, females, and total individuals ranged from 5.04 to 8.88, 4.22 to 11.70 and 4.22 to 11.70, respectively.

Original languageEnglish
Title of host publicationInventing Prosperous Future through Biological Research and Tropical Biodiversity Management
Subtitle of host publicationProceedings of the 5th International Conference on Biological Science
EditorsZuliyati Rohmah, Lisna Hidayati, Tuty Arisuryanti, Maryani, Ganies Riza Aristya
PublisherAmerican Institute of Physics Inc.
ISBN (Print)9780735417182
DOIs
Publication statusPublished - 15 Aug 2018
Event5th International Conference on Biological Science: Inventing Prosperous Future through Biological Research and Tropical Biodiversity Management, ICBS 2017 - Yogyakarta, Indonesia
Duration: 15 Sept 201716 Sept 2017

Publication series

NameAIP Conference Proceedings
Volume2002
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference5th International Conference on Biological Science: Inventing Prosperous Future through Biological Research and Tropical Biodiversity Management, ICBS 2017
Country/TerritoryIndonesia
CityYogyakarta
Period15/09/1716/09/17

Keywords

  • Java Sea
  • Portunus pelagicus
  • allometry
  • growth

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