Diversity of shrimp (Penaeidae Family) in coastal region of Cu Lao Dung district, Soc Trang province

Abstract

Study on species composition of shrimp of Penaeidae family in the coastal area of Cu Lao Dung district, Soc Trang province. This family has highest economic value and large distributed in the coastal region with high fluctuated salinity. The purpose of the study was to evaluate the status of fishing, production, and income contribution of this fishing activity to each household of the coastal community of the study region. Besides, the study also identified biodiversity index of shrimp in this in this family. The samples were collected 8 times from April to July, 2019. The sample schedule was twice a month (on 15th and 30th lunar calendar). Sampling sites were 5 stations belong to 2 communes with different habitats and fishing gears. The study also surveyed on 30 households, who are living in the study region and have participated in fishing activities. The results found that fishing is a traditional major and, there are 5 fishing gears popularly used by fisherman including: fence trap net (36.7%), bag net (16.7%), trawl net (26.7%), barier net (20%) and gill net (3%). In which, the composition of Penaeidae family had a high rate in fence trap and trawl net, accounting for 15 - 30% to daily economic income of households. It found 7 species of this family, includes: Metapenaeus ensis (30.27%), Metapenaeus lysianassa (46.89%), Penaeus monodon (2.13%),Metapenaeus affinis (0.57%), Metapenaeus tenuipes (14.44%), Parapenaeopsis cultrirostris (5.27%), Metapenaeus brevirconis (0.43%). However, shrimp species are unevenly distributed between the sampling location, the mudflats area have a species composition richer than the river area and the number of individuals of the species decreases gradually in rainy months (June and July). There is less diversity about shrimp composition in the region, Shannon Index (H’) is 1.02 – 1.41, results also found that wild shrimp was decreasing in the region.