Hatching patterns and egg types of Acartia erythraea (Copepoda, Calanoida) in eutrophic bay

Title
Hatching patterns and egg types of Acartia erythraea (Copepoda, Calanoida) in eutrophic bay
Alternative Title
부영양화된 만에서 요각류 Acartia erythraea의 부화 양상 및 난 형태
Author(s)
Jang, Min Chul; Choi, Seo Yeol; Shin, Kyoungsoon
KIOST Author(s)
Shin, Kyoung Soon(신경순)
Alternative Author(s)
장민철; 신경순
Publication Year
2021-07-02
Abstract
Acartia erythraea, a copepod species commonly found in the summer, was sampled weekly using a conical net, in Gamak
Bay (southern Korea) from 19 July to 14 November 2013. Egg production rate (EPR) and hatching success rate (HS) were estimated weekly during the study period, for egg types with distinct surface morphologies, i.e. smooth or spiny. EPR ranged from 1.0 to 25.0 eggs female−1 day−1 with a mean of 12.0 eggs female−1 day−1. Of these, all the eggs were smooth until August, whereas spiny eggs were produced from September, and the spiny eggs contributed 88% of the total eggs in November. Both egg types hatched within 12 to 48 h, and the average HS was 80% or higher. Contrary to previous studies, our findings suggest that it is impossible to determine whether an egg is subitaneous or diapause based on the egg surface structure. Spines on the surface of A. erythraea eggs in Gamak Bay could be an adaptation to seasonal variations and a rapidly changing coastal environment.
ISSN
1975-4701
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/41500
Bibliographic Citation
2021 한국산학기술학회 춘계학술대회, pp.1110 - 1113, 2021
Publisher
한국산학기술학회
Type
Conference
Language
English
Publisher
한국산학기술학회
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