Nguồn giống tôm ở một số khu vực gò đồi ngầm ngoài khơi Đông Nam Bộ, Việt Nam

Abstract

The study was conducted to assess the status species composition, abudance and distribution of larvae and juveniles of shrimp species in several several offshore seamounts in the Southeast region of Vietnam, providing a scientific basis to support the development of appropriate fishing strategies. Data used for analysis and assessment were collected from two surveys: one during the Northeast monsoon season of 2023 and the other during the Southwest monsoon season of 2024, using 24 fixed sampling stations across three seamounts (S13, S14 and S15). The results showed that 53 taxons were identified belonging to 20 families, including 5 economically significant shrimp families (mantis shrimp, two families of caridean shrimp and two families of penaeid shrimp). In the Northeast monsoon season, these families accounted for a higher proportion (53%) compared to the Southwest moonsoon season (40%). The average density of shrimp larvae and juveniles in the offshore seamount areas of the Southeast region was 546±12 individuals/1000m³ of seawater. Specifically, the density in the Northeast monsoon season reached 659±15 individuals/1000m³, which was much higher than the density at 433±8 individuals/1000m³ during the Southwest monsoon. The highest density of shrimp larvae and juveniles was in the seamount S15 compared to the others (p<0.05). This area is one of the transitional and recruitment zones linking the offshore and coastal areas of the Southeast region of Vietnam.

Keywords: larval-juvenile shrimps, species composition, the Southeast region of Vietnam, seamounts of Vietnam