Exploring the use of empirical methods to measure the secondary production of strombus canarium (Gastropoda

Strombidae) population in Johor Straits, Malaysia

Zaidi Che Cob, Mazlan Abd. Ghaffar, Aziz Arshad, Japar Sidik Bujang

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The study was conducted at Merambong Shoal (01°19.979'N, 103°35.965'E) in the Sungai Pulai estuary, Johor Straits, Malaysia from January to December 2005. Standing biomass of male and female Strombus canarium sub populations was calculated monthly based on the abundance value of each cohort and on the length-weight relationship. Secondary production was estimated using increment summation method, upon recognition of cohorts following the size-frequency distribution analysis using Bhattacharya and Hasselblad's NORMSEP metliods. Monthly variations in standing biomass (B) and production (P) showed higher values during the wet season compared to dry season, which indicate seasonal variations. Total production (P) was estimated at 0.14 gAFDWm -2yr1 and 0.45 gAFDWm-2yr1, while the annual mean population biomass (B̄) was estimated at 0.13 gAFDWm -2 and 0.26 gAFDWm-2, for males and females, respectively. The P/B̄ ratio was therefore calculated at 1.08 yr1 for male and 1.73 yr1 for female, which was within the values reported for other gastropod species. Estimates using empirical methods commonly used in secondary production studies found that none could be applied to the species. Considering the large amount of time, effort and resources involved in the conventional production estimation method, more studies are needed to establish a reliable production estimates for S. canarium, and possibly other gastropod species within the tropical region.

Original languageEnglish
Pages (from-to)817-825
Number of pages9
JournalSains Malaysiana
Volume38
Issue number6
Publication statusPublished - Oct 2009

Fingerprint

Canarium
secondary productivity
Malaysia
Gastropoda
biomass
dry season
tropics
wet season
estuaries
seasonal variation
methodology
Strombus
Strombidae

Keywords

  • Biomass
  • Increment summation method
  • Merambong shoal
  • Secondary production
  • Strombus canarium

ASJC Scopus subject areas

  • General

Cite this

Exploring the use of empirical methods to measure the secondary production of strombus canarium (Gastropoda : Strombidae) population in Johor Straits, Malaysia. / Che Cob, Zaidi; Abd. Ghaffar, Mazlan; Arshad, Aziz; Bujang, Japar Sidik.

In: Sains Malaysiana, Vol. 38, No. 6, 10.2009, p. 817-825.

Research output: Contribution to journalArticle

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