A trophic model of the coastal ecosystem in the waters of Bangladesh, Bay of Bengal (from the shoreline to 150 m depth) is presented. The model consists of 15 ecological groups. The biomasses of the groups (particularly the demersal species) were estimated from demersal trawl surveys conducted in the area between 1984 and 1986. The model estimated that the average trophic level of the trawl fishery catch was 2.7 in these years.
This paper presents results of stock assessment on two snapper species, Lutjanus vivanus and L. buccanella, in the north Caribbean coast of Costa Rica. Growth parameters, mortality rates, length-weight relationships, recruitment patterns and exploitation rates for the two species are given. Results indicate that the two species are subject to relatively low exploitation levels with E = 0.25 for L. vivanus and E = 0.39 for L. buccanella.
The parameters a and b of the length-weight relationship of the form W=aL super(b) were estimated for 24 species of soft bottom demersal fishes caught on the continental shelf off Jalisco and Colima states, Mexico. The estimates of b ranged from 2.74 to 3.33. The mean of the b values is 3.02 with a standard deviation of 0.15.
Length-weight relationship (LWR) parameters of 72 species of fishes and 15 species of cephalopods caught in the Balearic Islands demersal fishery are reported. This is the first compilation of LWR for these groups in the Balearic Islands.
On 22 January 1982, the International Center for Living Aquatic Resources Management (ICLARM) and the Ministry of Agriculture and Fisheries Development of Sabah, Malaysia (MAFD), signed a Memorandum of Agreement to cooperate and assist each other in research and development projects related to fisheries and aquaculture development. Both parties recognized the tremendous potential for coastal aquaculture development along Sabah's extensive and relatively unpolluted coastline.
In Asia, the fisheries sector is important in terms of food security, livelihoods and foreign exchange earnings. However, as in many parts of the world, there are signs that capture fisheries are fully exploited or overfished. Management of fisheries in the region is often hampered by lack of information on the status of fisheries in terms of biological, social, economic, policy and governance aspects. This regional project documents an alarming decline on coastal fishery resources, based on historic research surveys in South and Southeast Asia.
This article deals with the importance of finfish that are not sold on any market. We detail two major points of view: the ecological significance of larvae and juveniles for future harvests, and the importance of subsistence fisheries as a food supply, particularly in the tropics. In the first case, we show that larvae and juveniles of many commercially important species are linked to estuarine and coastal environments and to their quality; they are also dependent on other species of no commercial interest.
We provide a review of the assemblage structure of demersal fish resources in four South and Southeast Asian countries. Multivariate techniques (classification and ordination analysis) were used to analyze scientific trawl survey data from a collaborative project in the region. Analyses covered major coastal fishing areas in Bangladesh, Indonesia, Malaysia, and the Philippines. This represents the first such assessment of fish assemblages for the region using a standard analysis framework. Results indicate that spatial patterns of demersal assemblages are influenced by depth.
An examination was made of data on the length and species composition of the commercial deepsea snapper fishery of the Kingdom of Tonga in order to determine possible use of such information in the determination ofstatus of exploitation. Six major species were used for the analysis--Pristipomoides filamentosus, Etelis coruscans, P. flavipinnis, E. carbunculus, Epinephelus morrhua and E. septembasciatus . Although catch and effort data do not indicate overexploitation of the fishery, the size differences observed for P.
Fisheries are an important source of protein and employment for Sri Lanka’s population. The declaration of the Exclusive Economic Zone (EEZ) in 1976 gave the country a water area larger than its land area. The coastal fisheries resources consist of small and large pelagic fish, demersal and coral reef fish, invertebrates, shrimps and crabs. The small pelagic fish contribute 70% of the catch from coastal waters with an estimated annual production of 152 752 t in 1997.