Seasonal Population Structure of the Copepod Temora turbinata (Dana, 1849) in the Kuroshio Current Edge, Southeastern East China Sea

The abundance of adult males, females, and copepodites, and sex ratio of a Temora turbinata population and seawater hydrology were studied from 2018 to 2019 in waters off northeast Taiwan, northwest Pacific Ocean. The hydrological parameters showed significant differences between sampling months cau...

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Bibliographic Details
Published in:Applied sciences 2021-08, Vol.11 (16), p.7545
Main Authors: Wang, Yan-Guo, Tseng, Li-Chun, Xing, Bing-Peng, Sun, Rou-Xin, Chen, Xiao-Yin, Wang, Chun-Guang, Hwang, Jiang-Shiou
Format: Article
Language:English
Subjects:
Abundance
Chemical analysis
Coastal currents
Coastal waters
Coasts
copepod
Cruises
Females
Hydrology
Kueishan Island
Kuroshio Current
Laboratories
Northwest Pacific Ocean
Nuclear power plants
Plankton
Population
Population structure
Salinity
Sampling
Seasonal variations
Seawater
Sex ratio
Sexes
Software packages
Spatial distribution
Temora turbinata
Temporal distribution
Variance analysis
Water analysis
Wind
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Summary:The abundance of adult males, females, and copepodites, and sex ratio of a Temora turbinata population and seawater hydrology were studied from 2018 to 2019 in waters off northeast Taiwan, northwest Pacific Ocean. The hydrological parameters showed significant differences between sampling months caused by interactions of Kuroshio, East China Sea water, and the China Coastal Current. The highest average abundance was recorded from the June 2018 cruise with 2903.92 ± 3499.47 (inds. m−3), followed by a cruise in June 2019 with an average abundance of 1990.64 ± 1401.55 (inds. m−3). The sex ratio ranged between 0.25 and 2.33; the records were significantly higher in samples of June 2018 than during other sampling cruises (one-way ANOVA). The spatiotemporal distribution of T. turbinata showed a clear pattern of seasonal changes among sampling stations and distribution zones. Abundance of females and copepodites correlated significantly positive (r = 0.755, p < 0.001), whereas sex ratio (r = 0.247, p = 0.119) did not correlate significantly. The present study revealed that the abundance of T. turbinate was highest in June and was positively correlated with seawater temperature; furthermore, this is the first time the in situ sex ratio of T. turbinata in western Pacific waters has been reported.
ISSN:2076-3417
2076-3417
DOI:10.3390/app11167545