Hiện trạng khai thác và phân bố của hàu Răng cưa (Hyotissa hyotis Linnaeus, 1758) ở khu bảo tồn biển đảo Cồn Cỏ

Abstract

The study was carried out from June 2023 to May 2023 to investigate the status of fishing and determination of the distribution of giant oyster (Hyotissa hyotis) at Con Co Island MPA, Quang Tri Province. Result showed that the individual weight and length of giant oysters in the fishing expoitation area was range from 1.10 to 3.10 kg (1.94±0.51 kg) 10.5 to 22.3 cm (16.7±3.2 cm). The annual fishing season of giant oysters starts in March to the end of September, with the peak time of capture between April and July. The havesting area of giant oysters is mostly in service - administrative and buffer zone outside of Con Co Island MPA. The giant oyster is usualy collected by hand or hammers, crowbars and diving knifes... The density of exploited of giant oyster was 0.034-0.224 individual per m², with the average of 0.13 individual per m². The density of giant oyster trends to increase with the depth increasing. The highest density was recorded on the seabeds and in coral reefs.