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Amphipods in sediment traps of the eastern Fram Strait with focus on the life-history of the lysianassoid Cyclocaris guilelmi

2012; Elsevier BV; Volume: 73; Linguagem: Inglês

10.1016/j.dsr.2012.11.012

1879-0119

Angelina Kraft, Eduard Bauerfeind, Eva‐Maria Nöthig, Michaël Klages, Agnieszka Beszczyńska-Möller, Ulrich Bathmann,

Marine Bivalve and Aquaculture Studies

Life-cycle characteristics of the free-swimming lysianassoid amphipod Cyclocaris guilelmi were investigated and compared to those of other regularly appearing amphipods in the Arctic deep-sea community. In this context we analysed time-series data of meso- and bathypelagic amphipods collected as swimmers in moored sediment traps from 2004-2008 at the deep-sea long-term observatory HAUSGARTEN (79°N/4°E) in the eastern Fram Strait, Arctic Ocean. Six mesopelagic and three bathypelagic deep-sea amphipod species regularly occurred in the traps. The lysianassoid C. guilelmi showed a stable interannual population size and seasonal peaks in its occurrence from August to February during the five-year sampling period. The investigation of its population structure and reproduction ecology indicated year-round breeding behavior of this species. Up to 4 cohorts consisting mainly of juvenile and female C. guilelmi were observed. We conclude that C guilelmi plays an important role within the Arctic amphipod deep water community.