Y.J. Jo1, W. Park1*,
B. W. Lee1,
C. G. Kang2 and Y.E. Kim3?
Marine Biology, Pukyong National University, Busan, 48513, Korea
2School of Earth
Sciences and Environmental Engineering, GIST, Gwangju, 61005, Korea
Marine Biotechnology, Soonchunhyang University, Asan, 31538, Korea
Author Email :
Aim: This research
aimed to study the effect of temperature on egg production rate, egg
development time, hatching success rate and egg size of Acartia steueri
and seasonal variation of species composition of family Acartiidae.
variations of Acartiidae were investigated based on weekly collected samples
from Dadaepo beach, Busan, Korea. Live copepods were reared in laboratory at
five temperature regimes (10, 14, 18, 22 and 26℃) to estimate
temperature effects on the egg development time and productivity of A.
Results: Total five
acartiid species were found in the study area: Acartia omorii, A. steueri,
A. pacifica, A. erythraea, and A. sinjiensis. A. steueri and
A. omorii were dominated in colder months from January to April, while
A. pacifica, A. erythraea and A. sinjiensis were abundant
during warmer months from August to December. Egg production rates were
significantly correlated with water temperature. The embryonic development
time of A. steueri was longest at 10 ?C and shortest at 22 ?C.
The egg size decreased with increase in water temperature.
Interpretation: This study
indicated that temperature influenced embryonic development rate, generation
time and population variations of acartiid copepods.
Key words: Acartia steueri,
Dadaepo beach, Egg production rate, Population variation