kfas

SEARCH FOR ARTICLE

kfas, vol. 58, no. 4, pp.453-462, August, 2025 DOI. https://doi.org/10.5657/KFAS.2025.0453

Zooplankton Community Seasonal Variation of Around Oryuk Islands, Busan Korea

최정화·박원규¹^*
부경대학교 해양수산개발국제협력연구소, ¹부경대학교 수산생명과학부 자원생물학 전공

ABSTRACT

Zooplankton community and seasonal variations were investigated at four stations around the Oryuk Islands in Busan in August, October, and December 2016, and March 2017. Zooplankton was vertically collected with a 45 cm diameter, 200 μm mesh size conical net. In the study area, 33 taxa were identified in August, 54 in October, 44 in December 2016, and 30 in March 2017.The zooplankton densities ranged from 6,754.4 ind./m3 to 20,874.1 ind./m3 in August, 2,569.8 ind./m3 to 10,028.0 ind./m3 in October, 576.2 ind./m3 to 1,520.0 ind./m3 in December 2016, and 6,419.7 ind./ m3 to 10,398.2 ind./m3 in March 2017. Copepods were the most dominant taxonomic group at all stations during all seasons. The zooplankton community composition was two in August, three in October and December 2016, and one in March 2017. The dominant taxa were Oikopleura spp., cirripede nauplii, Pseudoevadne tergestina, and paracalanid copepods in August; Oikopleura spp. cirriped nauplius, paracalanid copepods, and Paracalanus parvus in October; Paracalanus parvus, Ditrichocorycaeus affinis, and paracalanid copepods in December 2016; and paracalanid copepods, calanoid copepods and Oithona similis in March 2017. Mesozooplankton communities showed a strong seasonality around the Oryuk Island.
Keyword

Oryuk Islands, Zooplankton community, Seasonality, Copepods