Distribution of mackerel, Scomber japonicus eggs and larvae in the coast of Jeju island, Korea in spring

Ichthyoplankton Assemblage Structure in Jinhae Bay, Korea

“…This phenomenon is due to the high density of fish eggs collected immediately after spawning; therefore, more individuals were collected near the spawning area. According to Lee, Kim, and Han (2016), the exact location of the spawning area was estimated based on the differences in the density of eggs collected at each station. This is because the density of fish eggs collected immediately after spawning is high and decreases as the eggs are gradually dispersed due to various factors such as the density difference in the surrounding waters (water temperature and salinity), tides, seawater circulation, and wind (Li, Pan, and Chen, 2014).…”

“…As the fish larvae grow, their density gradually decreases as they are dispersed by currents and winds in the surface layer; in addition, they move from the surface to the bottom, and the area density is expected to decrease Journal of Coastal Research, Special Issue No. 116, 2023 gradually (Isobe et al, 2002;Kim et al, 2019;Lee, Kim, and Han, 2016). Therefore, when comparing the populations of eggs and larvae collected in the same survey, the number of eggs collected is higher than that of the larvae (except for species that produce adhesive eggs and demersal eggs).…”

Enhancing Chub Mackerel Catch Per Unit Effort (CPUE) Standardization through High-Resolution Analysis of Korean Large Purse Seine Catch and Effort Using AIS Data

“…The KSBCC is known to originate from the deeper waters of the East Sea and transports cold waters below 10 • C and salinities in the range of 34-34.4‰ along the shallow coastal waters on the East coast of South Korea [22]. These influences have significant implications for the abundance and harvesting patterns of chub mackerel, which is categorized into distinct stocks based on variations in seasonal migration and spawning grounds: the Tsushima Current stock present in the East China Sea and the East Sea spawns from March to May in the East China Sea and from May to June in the Korean Strait, and the Pacific stock which inhabits the Pacific coast of Japan spawns from March to June in the waters around central Japan [23][24][25][26][27].…”