Status of some fishery resources in a tropical mangrove estuary of Sarawak, Malaysia

Abstract

This study was carried out to assess the fishery resources of the Sibuti River estuary, Sarawak, Malaysia. Data were collected from the study area for a period of one year in different seasons. The estuary is relatively species-rich and a total of 4675 individuals of 32 families from 60 species of fish (55), crab (four) and shrimp (one) were collected. Coilia dussumieri was the dominant species (22.63%) followed by Nemapteryx caelata (11.85%), Otolithes ruber (7.85%) and Ilisha elongata (5.80%). Marked seasonal variations were found among most of the hydrobiological factors; however, seasonal variations were not significant for the diversity indices such as Shannon-Wiener, Margalef and Evenness. The number of fish taxa caught in different mesh size gill nets was 1 inch (42 species) > 2 inch (36 species) > 4 inch (25 species), suggesting that smaller mesh nets are more suitable for assessing the diversity of fishery resources. SIMPER analysis showed that Coilia dussumieri was the most abundant species in the dry (10.3%) and intermediate (8.1%) seasons, whereas N. caelata was most abundant in the wet season (7.1%). Significant differences (ANOSIM and nMDS) were observed in the species community structure between dry-intermediate and dry-wet seasons; however, species compositions were not significantly different between intermediate and wet seasons. Canonical correspondence analysis (CCA) showed that most of the species assemblages were positively correlated with turbidity and chlorophyll a, followed by phosphate, nitrate and zooplankton density. The findings suggest that the Sibuti mangrove estuary is productive in terms of diversified fishery resources, which are influenced by the hydrobiological factors.

Assessment of trace metal in macroalgae and sediment of the Sundarban mangrove estuary

“…Dissolved oxygen was maximum (8.73 mg/L) in the premonsoon and minimum (2.56 mg/L) in the post-monsoon (Table 1). Chakraborty et al (2015) also found considerably higher DO during pre-monsoon season, and the most similar pattern was observed in the study of Hoque et al (2015).…”

Composition and diversity of plants in Sibuti mangrove forest, Sarawak, Malaysia

“…Mangrove ecosystems sustain the livelihoods of coastal communities and provide essential support for fishery resources and other marine organisms (Kathiresan and Bingham 2001;Garcia et al 2014;Hoque et al 2015a). The biomass production and economic valuation of the mangrove forests are quite high (i.e., 200,000 to 9,000,000 US$ ha ¡1 year ¡1 ), including coastal protection and ecological services (McLeod and Salm 2006;Wells et al 2006), compared to other plant communities (Rodriguez and Feller 2004).…”

Growth and economic performance of different supplementary feed on female mud crab (Scylla olivacea) fattening in plastic box

“…Bangladesh has a vast area of coastline including 618,780 ha of mangrove tidal flat and 80,000 ha of prime area which is suitable for brackish water aquaculture (Anon, 2003) especially for crab culture. The mud crab fishery is absolutely based on wild catch mainly from the swamps of the mangrove (Hoque et al, 2015;Kaleem et al, 2016) and vast areas of the traditional shrimp ghers along the coastal region of Bangladesh. Its actual culture technique of mud crab has not yet been developed in our country.…”