Age, growth, mortality and population structure of Strombus canarium (Gastropoda: Strombidae): variations in male and female sub-populations.
The age, growth, mortality and population structure of Strombus canarium Linnaeus, 1758 were examined in the Johor Straits, Malaysia from January to December 2005. A total of 2088 conchs were sampled where females were more abundant than males with monthly sex ratio of 1.72±0.17 (N = 12). The estima...
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| Format: | Article |
| Language: | English English |
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Asian Network for Scientific Information
2009
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| Online Access: | http://psasir.upm.edu.my/id/eprint/12964/ http://psasir.upm.edu.my/id/eprint/12964/1/Age%2C%20growth%2C%20mortality%20and%20population%20structure%20.pdf |
| _version_ | 1848841980836052992 |
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| author | Che Cob, Zaidi Arshad , Aziz Bujang, Japar Sidik Abd Ghafar, Mazlan |
| author_facet | Che Cob, Zaidi Arshad , Aziz Bujang, Japar Sidik Abd Ghafar, Mazlan |
| author_sort | Che Cob, Zaidi |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | The age, growth, mortality and population structure of Strombus canarium Linnaeus, 1758 were examined in the Johor Straits, Malaysia from January to December 2005. A total of 2088 conchs were sampled where females were more abundant than males with monthly sex ratio of 1.72±0.17 (N = 12). The estimated growth parameter showed higher asymptotic length (L∞) and growth coefficient (K) in females (L∞ = 70.20 mm, K = 1.50 year-1) compared with the males (L∞ = 69.30 mm, K = 1.20 year-1). This resulted in better overall growth performance of females (φ’ = 3.81) compared with the males (φ’ = 3.48). The growth pattern of females and males showed positive allometric nature of growth (b>3, p<0.05), with estimated maximum life span of 2.0 and 2.5 year, respectively. The recruitment pattern was continuous, displaying only a single major peak event per year. The estimated natural mortality rate (M) was 0.95 year-1 in females and 0.86 year-1 in males, while the total mortality rate (Z) was 2.56 and 2.72 year-1, respectively. The fishing mortality rate (F) was 1.61 year-1 in females and 1.86 year-1 in males, which were higher than the natural mortality rates, thus indicating an unbalanced position of the stock. In addition, the exploitation rate (E) was higher than the maximum allowable limit of exploitation (EMSY), which was a further indication of overexploitation. For sustainable utilization of the resource, serious efforts should immediately be taken in reducing the exploitation rates of S. canarium in the study area. |
| first_indexed | 2025-11-15T07:51:52Z |
| format | Article |
| id | upm-12964 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English English |
| last_indexed | 2025-11-15T07:51:52Z |
| publishDate | 2009 |
| publisher | Asian Network for Scientific Information |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-129642015-11-04T01:02:28Z http://psasir.upm.edu.my/id/eprint/12964/ Age, growth, mortality and population structure of Strombus canarium (Gastropoda: Strombidae): variations in male and female sub-populations. Che Cob, Zaidi Arshad , Aziz Bujang, Japar Sidik Abd Ghafar, Mazlan The age, growth, mortality and population structure of Strombus canarium Linnaeus, 1758 were examined in the Johor Straits, Malaysia from January to December 2005. A total of 2088 conchs were sampled where females were more abundant than males with monthly sex ratio of 1.72±0.17 (N = 12). The estimated growth parameter showed higher asymptotic length (L∞) and growth coefficient (K) in females (L∞ = 70.20 mm, K = 1.50 year-1) compared with the males (L∞ = 69.30 mm, K = 1.20 year-1). This resulted in better overall growth performance of females (φ’ = 3.81) compared with the males (φ’ = 3.48). The growth pattern of females and males showed positive allometric nature of growth (b>3, p<0.05), with estimated maximum life span of 2.0 and 2.5 year, respectively. The recruitment pattern was continuous, displaying only a single major peak event per year. The estimated natural mortality rate (M) was 0.95 year-1 in females and 0.86 year-1 in males, while the total mortality rate (Z) was 2.56 and 2.72 year-1, respectively. The fishing mortality rate (F) was 1.61 year-1 in females and 1.86 year-1 in males, which were higher than the natural mortality rates, thus indicating an unbalanced position of the stock. In addition, the exploitation rate (E) was higher than the maximum allowable limit of exploitation (EMSY), which was a further indication of overexploitation. For sustainable utilization of the resource, serious efforts should immediately be taken in reducing the exploitation rates of S. canarium in the study area. Asian Network for Scientific Information 2009 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/12964/1/Age%2C%20growth%2C%20mortality%20and%20population%20structure%20.pdf Che Cob, Zaidi and Arshad , Aziz and Bujang, Japar Sidik and Abd Ghafar, Mazlan (2009) Age, growth, mortality and population structure of Strombus canarium (Gastropoda: Strombidae): variations in male and female sub-populations. Journal of Applied Sciences, 9 (18). pp. 3287-3297. ISSN 1812-5654 http://scialert.net/jindex.php?issn=1812-5654 10.3923/jas.2009.3287.3297 English |
| spellingShingle | Che Cob, Zaidi Arshad , Aziz Bujang, Japar Sidik Abd Ghafar, Mazlan Age, growth, mortality and population structure of Strombus canarium (Gastropoda: Strombidae): variations in male and female sub-populations. |
| title | Age, growth, mortality and population structure of Strombus canarium (Gastropoda: Strombidae): variations in male and female sub-populations. |
| title_full | Age, growth, mortality and population structure of Strombus canarium (Gastropoda: Strombidae): variations in male and female sub-populations. |
| title_fullStr | Age, growth, mortality and population structure of Strombus canarium (Gastropoda: Strombidae): variations in male and female sub-populations. |
| title_full_unstemmed | Age, growth, mortality and population structure of Strombus canarium (Gastropoda: Strombidae): variations in male and female sub-populations. |
| title_short | Age, growth, mortality and population structure of Strombus canarium (Gastropoda: Strombidae): variations in male and female sub-populations. |
| title_sort | age, growth, mortality and population structure of strombus canarium (gastropoda: strombidae): variations in male and female sub-populations. |
| url | http://psasir.upm.edu.my/id/eprint/12964/ http://psasir.upm.edu.my/id/eprint/12964/ http://psasir.upm.edu.my/id/eprint/12964/ http://psasir.upm.edu.my/id/eprint/12964/1/Age%2C%20growth%2C%20mortality%20and%20population%20structure%20.pdf |