kergueleni, we aimed to determine their consumption rates (g food x g amphipods −1 x day −1) and preferences of macroalgae and fish. Assuming that a temporal dietary switch may increase the colonisation success of the most abundant lysianassoids C. While in the newly ice-free areas fish are rare, macroalgae have already colonised hard substrates.
In Potter Cove, the climate-driven rapid retreat of the Fourcade Glacier is causing various environmental changes including the provision of new marine habitats to colonise.
#The scavengers drivers#
Furthermore, we aimed to detect ecological drivers for distribution patterns of scavenging amphipods in the Antarctic coastal ecosystems of Potter Cove. The experimental approach combined ex situ feeding experiments, behavioural observations, and scanning electron microscopic analyses of mandibles. To this end, we compared the relatively large species Waldeckia obesa with the small species Cheirimedon femoratus, Hippomedon kergueleni, and Orchomenella rotundifrons during fish carcass feeding ( Notothenia spp.). Here we address the question whether scavenging lysianassoid amphipods employ different feeding strategies during carcass feeding, and whether synergistic feeding activities may influence carcass decomposition. In the bentho-pelagic realm of the Southern Ocean, scavenging amphipods (Lysianassoidea) are ubiquitous and occupy a central role in decomposition processes. Niche partitioning among them can manifest in different feeding strategies, e.g. Scavenger guilds are composed of a variety of species, co-existing in the same habitat and sharing the same niche in the food web.
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