Overwinter habitat selection by Antarctic krill under varying sea-ice conditions: implications for top predators and fishery management
نویسندگان
چکیده
منابع مشابه
Responses of Antarctic pack-ice seals to environmental change and increasingkrill fishing
The compound effects of changing habitats, ecosystem interactions, and fishing practices have implications for the management of Antarctic krill and conservation of its predators. For Antarctic pack-ice seals, an important group of krill predators, we estimate the density and krill consumption in theWest Antarctic Peninsula (WAP)–WesternWeddell Sea area, the main fishery region; and we consider...
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Mitigating direct and indirect interactions between marine predators and fisheries is a motivating factor for ecosystem-based fisheries management (EBFM), especially where predators and fisheries compete for a shared resource. One difficulty in advancing EBFM is parameterizing clear functional responses of predators to indices of prey availability. Alternative characterizations of fishery-preda...
متن کاملAntarctic Sea ice--a habitat for extremophiles.
The pack ice of Earth's polar oceans appears to be frozen white desert, devoid of life. However, beneath the snow lies a unique habitat for a group of bacteria and microscopic plants and animals that are encased in an ice matrix at low temperatures and light levels, with the only liquid being pockets of concentrated brines. Survival in these conditions requires a complex suite of physiological ...
متن کاملAntarctic krill under sea ice: elevated abundance in a narrow band just south of ice edge.
We surveyed Antarctic krill (Euphausia superba) under sea ice using the autonomous underwater vehicle Autosub-2. Krill were concentrated within a band under ice between 1 and 13 kilometers south of the ice edge. Within this band, krill densities were fivefold greater than that of open water. The under-ice environment has long been considered an important habitat for krill, but sampling difficul...
متن کاملIncreasing Antarctic Sea Ice under Warming Atmospheric and Oceanic Conditions
Estimates of sea ice extent based on satellite observations show an increasing Antarctic sea ice cover from 1979 to 2004 even though in situ observations show a prevailing warming trend in both the atmosphere and the ocean. This riddle is explored here using a global multicategory thickness and enthalpy distribution sea ice model coupled to an ocean model. Forced by the NCEP–NCAR reanalysis dat...
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ژورنال
عنوان ژورنال: Marine Ecology Progress Series
سال: 2017
ISSN: 0171-8630,1616-1599
DOI: 10.3354/meps12099