Abstract
The reproductive response of Rhincalanus gigas to the build up of a phytoplankton bloom in the Southern Ocean was studied during the European iron fertilization experiment (EIFEX). Egg production experiments were conducted over a period of approximately 5 weeks during development of a diatom dominated bloom. R. gigas showed a clear response to increasing chlorophyll a concentrations and the total egg production of the R. gigas population was highest just after the peak of the bloom at day 29 after fertilization. The average peak production was 50 eggs female−1 day−1. The percentage of egg producing females increased from about 0 to 90% during the course of the experiment. Accordingly, the maturation of the gonads reflected the positive response towards enhanced chlorophyll a concentrations. The fast reproductive response indicate that R. gigas was food limited during the period of this study in the Antarctic Polar Front region (APF).
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References
Atkinson A (1991) Life cycles of Calanoides acutus, Calanus simillimus and Rhincalanus gigas (Copepoda: Calanoida) within the Scotia Sea. Mar Biol 109:79–91
Boyd PW, Watson AJ, Law CS, Abraham ER, Trull T, Murdoch R, Bakker DCE, Bowle AR, Buesseler KO, Chang H, Charette M, Croot P, Downing K, Frew R, Gall M, Hadfield M, Hall J, Harvey M, Jameson G, LaRoche J, Liddlcoat M, Ling R, Maldonado MT, McKay RM, Nodder S, Pickmere S, Pridmore R, Rintoul S, Safl K, Sutton P, Strzepek R, Tanneberger K, Turner S, Walte A, Zeldis J (2000) A mesoscale phytoplankton bloom in the polar Southern Ocean stimulated by iron fertilization. Nature 407:695–702
Coale KH, Johnson KS, Chavez FP, Buesseler KO, Barber RT, Brzezinski MA, Cochlan WP, Millero FJ, Falkowski PG, Bauer JE, Wanninkhof RH, Kudela RM, Altabet MA, Hales BE, Takahashi T, Landry MR, Bidigare RR, Wang X, Chase Z, Strutton PG, Friederich GE, Gorbunov MY, Lance VP, Hilting AK, Hiscock MR, Demarest M, Hiscock WT, Sullivan KF, Tanner SJ, Gordon RM, Hunter CN, Elrod VA, Fitzwater SE, Jones JL, Tozzi S, Koblizek M, Roberts AE, Herndon J, Brewster J, Ladizinsky N, Smith G, Cooper D, Timothy D, Brown SL, Selph KE, Sheridan CC, Twining BS, Johnson ZI (2004) Southern Ocean iron enrichment experiment: carbon cycling in high- and low-Si waters. Science 304:408–414
Gervais F, Riebesell U, Gorbunov MY (2002) Changes in primary productivity and chlorophyll a in response to iron fertilization in the Southern Polar Frontal Zone. Limnol Oceanogr 47:1324–1335
Kiørboe T, Møhlenberg F, Tiselius P (1988) Propagation of planktonic copepods: production and mortality of eggs. Hydrobiologia 167/168:219–225
Laubscher RK, Perissinotto R, McQuaid CD (1993) Phytoplankton production and biomass at frontal zones in the Atlantic Sector of the Southern Ocean. Polar Biol 13:471–481
Lopez MDG, Huntley ME, Lovette JT (1993) Calanoides acutus in Gerlache Strait, Antarctica. I. Distribution of late copepodite stages and reproduction during spring. Mar Ecol Prog Ser 100:153–165
Martin JH, Gordon RM, Fitzwater SE (1990) Iron in Antarctic waters. Nature 345:156–158
Niehoff B, Hirche H-J (1996) Oogenesis and gonad maturation in the copepod Calanus finmarchicus and the prediction of egg production from preserved samples. Polar Biol 16:601–612
Niehoff B, Runge JA (2003) A revised methodology for prediction of egg production Calanus finmarchicus from preserved samples. J Plankton Res 25:1581–1587
Ommanney FD (1936) Rhincalanus gigas (Brady) a copepod of the southern macroplankton. Discov Rep 13:277–384
Pakhomov EA, Perissinotto R, McQuaid CD, Froneman PW (2000) Zooplankton structure and grazing in the Atlantic sector of the Southern Ocean in late austral summer 1993: Part 1. Ecological zonation. Deep Sea Res I 47:1663–1686
Röttgers R, Colijn F, Dibbern M (2005) Algal physiology and biooptics. In: Smetacek V, Bathmann U, Helmke E (eds) The expedition ANTARKTIS XXI/3-4-5 of the research vessel Polarstern in 2004. Reports on Polar and Marine Research, 500, pp 82–88
Shreeve R, Ward P, Whitehouse MJ (2002) Copepod growth and development around South Georgia: relationships with temperature, food and krill. Mar Ecol Prog Ser 233:169–183
Strass V, Cisewski B, Gonzalez S, Leach H, Loquay K-D, Prandke H, Rohr H, Thomas M (2005) The physical setting of the European Iron fertilization Experiment EIFEX in the Southern Ocean. In: Smetacek V, Bathmann U, Helmke E (eds) The expedition ANTARKTIS XXI/3-4-5 of the research vessel Polarstern in 2004. Reports on Polar and Marine Research, 500, pp 15–46
Voronina NM (1998) Comparative abundance and distribution of major filter-feeders in the Antarctic pelagic zone. J Mar Syst 17:375–390
Ward P, Shreeve RS (1995) Egg production in three species of Antarctic Calanoid Copepods during austral summer. Deep Sea Res I 42:721–735
Ward P, Shreeve RS (1999) The spring mesozooplankton community at South Georgia: a comparison of shelf and oceanic sites. Polar Biol 22:289–301
Ward P, Shreeve RS, Cripps GC, Trathan PN (1996) Mesoscale distribution and population dynamics of Rhincalanus gigas and Calanus simillimus in the Antarctic Polar Open Ocean and Polar Frontal Zone during summer. Mar Ecol Prog Ser 140:21–32
White JR, Roman MR (1992) Egg production by the calanoid copepod Acartia tonsa in the mesohaline Chesapeake Bay: the importance of food resources and temperature. Mar Ecol Prog Ser 86:239–249
Acknowledgements
We would like to thank the captain and the crew of the RV “Polarstern” for their support. T. Stadtlander helped with the zooplankton collection during the cruise. M. Schmidt and A. Terbrüggen helped with Chl a analysis. C/N values from station 424 and 513 were provided by S. Kruse. Helpful comments by V. Smetacek, C. Wexels Riser, B. Niehoff and two anonymous referees are highly appreciated.
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Jansen, S., Klaas, C., Krägefsky, S. et al. Reproductive response of the copepod Rhincalanus gigas to an iron-induced phytoplankton bloom in the Southern Ocean. Polar Biol 29, 1039–1044 (2006). https://doi.org/10.1007/s00300-006-0147-0
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DOI: https://doi.org/10.1007/s00300-006-0147-0