Interannual variations in euphausiid life stage distribution in the Dumont d'Urville Sea from 2004 to 2008
| Type | Article | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Date | 2011-08 | ||||||||
| Language | English | ||||||||
| Author(s) | Vallet Carole1, 2, 3, 4, Labat Jean-Philippe5, 6, Smith Martina7, 8, Koubbi Philippe5, 6 | ||||||||
| Affiliation(s) | 1 : UArtois, Ctr IUFM Nord Pas Calais, Ctr IUFM Outreau, F-62230 Outreau, France. 2 : Univ Lille Nord France, F-59000 Lille, France. 3 : ULCO, LOG, F-62930 Wimereux, France. 4 : CNRS, UMR8187, F-62930 Wimereux, France. 5 : Univ Paris 06, Stn Zool, CNRS UMR 7093, Lab Oceanog Villefranche, F-06230 Villefranche Sur Mer, France. 6 : CNRS, UMR 7093, LOV, F-06234 Villefranche Sur Mer, France. 7 : Univ Tasmania, Tasmanian Aquaculture & Fisheries Inst, Marine Res Labs, Hobart, Tas 7001, Australia. 8 : Univ Tasmania, Sch Zool, Hobart, Tas 7001, Australia. |
||||||||
| Source | Polar Science (1873-9652) (Elsevier Science Bv), 2011-08 , Vol. 5 , N. 2 , P. 166-178 | ||||||||
| DOI | 10.1016/j.polar.2011.03.006 | ||||||||
| WOS© Times Cited | 7 | ||||||||
| Keyword(s) | Euphausia crystallorophias, Thysanoessa macrura, Antarctic, Abundance, Spatial distribution, Environmental factors | ||||||||
| Abstract | Euphausiid larvae were caught by oblique tows of a double-framed bongo net at 118 stations along the coast of Terre Adelie during every summer from 2004-2008. Larvae of Euphausia crystallorophias Holt and Tattersall and Thysanoessa macrura G.O. Sars were observed in the study area every year in contrast to larvae of Euphausia superba which were absent during the entire period of sampling. Highest abundances of both species were observed during the summer of 2005 and the lowest in the summer of 2004. Larvae of E. crystallorophias dominated every year and comprised more than 80% of the total abundance of euphausiid larvae. Within species, the calyptopis stages especially calyptopis 1 of E. crystallorophias dominated compared to furcilia stages of T. macrura which were less abundant. For both species, spatio-temporal variations in abundances of developmental stages were significantly correlated to density and salinity of the deep water layer. In the case of calyptopis 3 of E. crystallorophias, spatio-temporal variations were correlated with the number of days between the end of the sea ice retreat and the sampling day and for T. macrura inversely correlated to temperature of surface water layer. These variations are discussed and related to the timing of sea ice retreat, the sea ice concentration as well as metabolic conditions of adults of both species during their spawning period. | ||||||||
| Full Text |
|