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National Committee on Marine Sciences (NCMS)

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1988 - 198911990 - 19982

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Geographic name: search.filters.geographicname.Lingayen GulfOcean Decade Challenge: search.filters.odc.Challenge 2: Protect and restore ecosystems and biodiversity

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    The Lingayen Gulf (Philippines) experience: if we have to do it again
    Talaue-McManus, Liana; Eng, Chua Thia (Elsevier BV, 1997-01)
    The coastal management of the Lingayen Gulf represents a pioneering effort in the Philippines to manage a coastal area that is larger than small islands. After 4 years of research and plan preparation, implementation was initiated with the declaration of the Gulf as an environmentally critical area, and the establishment of the Lingayen Gulf Coastal Area Management Commission. An analyses of the organization and performance of the Commission provided major lessons for future initiatives in coastal management. Programs on law enforcement through punitive measures and vigorous public environmental education through the mass media are easy to implement, and have significant potential to create immediate positive impact among local communities. At the same time, a program on capacity building of management partners at all local governance levels, is crucial for long-term impact. Otherwise, programs on resource management and livelihood development, which require substantial technical inputs, cannot be appropriately implemented.
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    Aspects of the growth, recruitment, mortality and reproduction of the scallop Amusium pleuronectes (Linné) in the Lingayen Gulf, Philippines
    Del Norte, A. G. C. (Informa UK Limited, 1988-11)
    Growth, recruitment, mortality and reproduction were investigated in the Asian moon scallop, Amusium pleuronectes (Linne) from the Lingayen Gulf, Philippines. Allometric relationships were defined by comparing different shell dimensions, as well as body weight proportions including total weight with shell, visceral weight, adductor muscle weight and gonad weight. Use of the von Bertalanffy-based ELEFAN I program yielded estimates of growth parameters equivalent to H ∞ = 106Dimshell height and K = 0.92 per year, with approximate longevity for the species of about 2 years. Recruitment, as derived using the ELEFAN II program, occurred throughout the year, but showed a pattern consisting of one major and one minor pulse separated by an 8- and 4-months interval. Fishing mortality (F = 5.3) was higher than natural mortality (M = 1.9). Spawning occurred throughout the year, with one major peak in February and one minor peak between July and September, thereby providing some biological basis to the recruitment pattern indicated. Protandry and size at sexual maturity (54 mm) in the species were confirmed.