Aspects of the population biology of the brown mussel, Modiolus metcalfei (Hangley), in Panguil Bay, Nothern Mindanao, with notes on a possible management strategy for the species / by Marcelino I. Tumanda Jr.
Material type:
TextLanguage: English Publication details: Diliman, Quezon City : University of the Philippines, 1998.Description: xviii, 148 pages : illustrations ; 28 cmContent type: - text
- unmediated
- volume
- 578.77 T83 1998
| Item type | Current library | Collection | Call number | Materials specified | URL | Copy number | Status | Notes | Date due | Barcode |
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Theses / Manuscripts
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Ladislao N. Diwa Memorial Library Theses Section | Non-fiction | 578.77 T83 1998 (Browse shelf(Opens below)) | Link to resource | copy 1 | Room use only | T-5938 | 00000011 | ||
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Theses / Manuscripts
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Ladislao N. Diwa Memorial Library Theses Section | Non-fiction | 578.77 T83 1998 (Browse shelf(Opens below)) | Link to resource | copy 2 | Room use only | T-5979 | 00000012 | ||
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Theses / Manuscripts
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Ladislao N. Diwa Memorial Library Theses Section | Non-fiction | 578.77 T83 1998 (Browse shelf(Opens below)) | Link to resource | copy 3 | Room use only | T-5980 | 00000013 |
Thesis (PhD--Marine Science) University of the Philippines.
Includes bibliographical references.
POPULATION GROWTH, MORTALITY AND RECRUITMENT PATTERNS OF THE BROWN MUSSEL, MODIOLUS METCALFEI (HANLEY), IN PANGUIL BAY, SOUTHERN PHILIPPINES
ABSTRACT
An assessment of stock of Modiolus metcalfei (Hanley) was conducted in Panguil Bay, Southern Philippines, to determine population growth parameters of the species and the status of the fishery given the current harvesting efforts of this resource in the bay. Growth parameters of the VBGF from the three selected sites were as follows: K = 1.83 yr! and L. 61.67 mm. Growth in shell length and dry weight of brown mussel populations monitored in their natural beds showed faster rates in mussel bed areas with lesser density levels. Recruitment appeared to be bimodal in two sampling stations with one major and another minor peak occurring within a year. The occurrence of the major peaks of spat settlement based on the length frequency data appeared to be variable in the three sampling areas established in the study.
Catch curve analyses showed variability of total mortality (Z) values ranging from 4.69 - 7.64 yr’ for the three stations. Exploitation rates of 57% to 81% of total mortality were attributed to intensive mussel gathering by local fishermen. Fishing mortalities and rates of exploitation showed an over-exploited resource that necessitates some management intervention in order to maintain its sustainability.
Submitted to the University Library 5/27/2010 T-5938 copy 1
Submitted to the University Library 5/27/2010 T-5979 copy 2
Submitted to the University Library 5/27/2010 T-5980 copy 3