High mortality and poor growth of green mussels, Perna viridis, in high chlorophyll-a environment

Tan, Kar Soon and Delta Jenetty Denil and Julian Ransangan (2016) High mortality and poor growth of green mussels, Perna viridis, in high chlorophyll-a environment. Ocean Science Journal, 51 (1). pp. 43-57. ISSN 1738-5261 (Print) 2005-7172 (Online)


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The current study was carried out from May 2014 to April 2015 to estimate the stock status of P. viridis in Marudu Bay. The gonad development was monitored by histological examination, while the population parameters including asymptotic length (L∞), growth coefficient (K), mortality rate (Z, F and M), exploitation level (E) and recruitment of P. viridis were estimated using the lengthfrequency data. Results of the current study demonstrated that P. viridis in Marudu Bay spawned throughout the year with two major peaks, one in April to May and another one in October to December. The recruitment pattern was continuous with the peak in May to June 2014, which corresponded to the first spawning peak in April. However, no significant recruitment was observed from the second spawning peak due to the difference in spawning timing between male and female populations. The estimated asymptotic length (L∞), growth coefficient (K), total mortality (Z), natural mortality (M), fishing mortality (F) and growth performance (ф) of P. viridis in Marudu Bay were estimate to be 117 mm, 0.97 yr-1, 4.39 yr-1, 1.23 yr-1, 3.16 yr-1 and 4.123, respectively. The exponent b of the lengthweight relationship was 2.4 and exploitation level (E) was 0.72. The high mortality, low condition indices and negative allometric of P. viridis in Marudu Bay is caused by a lack of suitable food in the surrounding water.

Item Type: Article
Keyword: reproduction, condition index, population parameters, Perna viridis, Marudu Bay
Subjects: S Agriculture > SH Aquaculture. Fisheries. Angling
Department: INSTITUTE > Borneo Marine Research Institute
Depositing User: Munira M
Date Deposited: 31 Jan 2017 14:33
Last Modified: 25 Oct 2017 14:57
URI: https://eprints.ums.edu.my/id/eprint/15443

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