NDLI: Population dynamics of four dominant copepods in Prydz Bay, Antarctica, during austral summer from 1999 to 2006

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Population dynamics of four dominant copepods in Prydz Bay, Antarctica, during austral summer from 1999 to 2006

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Population dynamics of four dominant copepods in Prydz Bay, Antarctica, during austral summer from 1999 to 2006

Content Provider	Springer Nature Link
Author	Yang, Guang Li, Chaolun Sun, Song
Copyright Year	2011
Abstract	Population dynamics of four dominant Antarctic copepods, Calanoides acutus, Calanus propinquus, Metridia gerlachei and Rhincalanus gigas were studied based on zooplankton samples collected in the Prydz Bay during austral summer from 1999 to 2006. We found that C. acutus was the most abundant species among these four copepods, followed by C. propinquus, M. gerlachei and R. gigas. R. gigas occurred mainly in the warmer oceanic regions and showed distribution patterns discrete from the other three species, whose distribution in the whole survey area overlapped. By December 15th (about one month before our sampling) of the years 1999, 2003 and 2006, sea ice retreated earlier and polynyas existed in the neritic region one month before sampling. These periods were characterized by numerical dominance of C. acutus, C. propinquus and M. gerlachei, elevated proportions of Copepodite I and Copepodite II stages especially in the neritic region. While for the years 2000, 2002, and 2005, the ice edge located more northerly and polynyas did not exist in the neritic region, the copepods abundance was lower, indicating poor recruitment. Population structure of R. gigas was mainly composed of advanced stages Copepodite V and female during all cruises. Log10 (x+1) transformed densities of C. acutus, C. propinquus and M. gerlachei showed positive correlation with temperature and chlorophyll a concentration, while mean population stages of these copopods were negatively correlated with these environmental variables. Younger copepodite stages of C. acutus, C. propinquus and M. gerlachei appeared more often in neritic regions. We confirmed that the polynyas had a great contribution to phytoplankton blooms, which promote copepods reproduction and recruitment success. The study suggested that population dynamics of the four copepods have good correspondence with sea ice and polynya variations during all cruises of the Prydz Bay.
Starting Page	1065
Ending Page	1074
Page Count	10
File Format	PDF
ISSN	02544059
Journal	Chinese Journal of Oceanology and Limnology
Volume Number	29
Issue Number	5
e-ISSN	19935005
Language	English
Publisher	SP Science Press
Publisher Date	2011-08-08
Publisher Place	Heidelberg
Access Restriction	Subscribed
Subject Keyword	copepods population structure inter-annual variations Prydz Bay Southern Ocean Oceanography
Content Type	Text
Resource Type	Article
Subject	Water Science and Technology Oceanography

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