Seasonal Fluctuation of Meiobenthic Fauna Community at Keunso Tidal Flat in Taean, Korea

Abstract

The community structure of meiobenthos was investigated from seasonal surveys at four stations of Keunso Bay in Taean. Samples of meiobenthos were collected in August, October, 2013 and January, April, 2014. Triplicate faunal samples were collected by using an acryl corer with a 3.6 cm diameter at each station. The mean grain size of the study area ranged from 3.65 ø to 6.35 ø. Total 13 meiofaunal groups were found in the study area. The total density of meiobenthos at each station was be 1,521-7,849 ind./10 cm 2 . Nematodes were the most dominant faunal group at all stations. The subdominant group were Sarcomastigophorans and benthic harpacticoid copepods. The highest meiofaunal density was shown in spring, whereas the lowest density was recorded in summer. A total of 13 meiobenthic taxa were found, the richest taxa in October at station 2 (13 ind./10 cm 2 ), and the lowest in April at station 4 (5 ind./10 cm 2 ). There were seasonal fluctuations in the number of meiobenthic taxa decreasing from summer to spring. The density of meiobenthos gradually decreased as the depth of sediment increased. Seasonal changes in the vertical distribution of meiobenthos in the study area occurred mainly near the sediment surface.

Vitamin K variations in conger eel (Conger myriaster) influenced by harvest time and size

“…Jeong et al (1998) reported that in marine ecosystems, the nutrient composition of fish is likely to vary considerably across seasons due to a complex interplay of factors such as fish diet, water temperature, and spawning patterns. While there have been studies on the seasonal variations in the characteristics of fishery resources, the majority have focused on changes in species composition and community distribution (Hwang and Park, 2017;Lee et al, 2000;Lee et al, 2010;Oh et al, 2012;Shin et al, 2016). However, research addressing seasonal changes in the levels of micronutrients in fishery resources is notably scarce.…”