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Annual krill Euphausia superba catch between 2011 and 2016 by FV Betanzos in subareas 48.1, 48.2 and 48.3.
Source publication
Antarctic krill (Euphausia superba) is a key resource in the Antarctic region, as it is the primary food source for fish, whales, seals, flying birds, penguins and cephalopods. The high concentrations of the species and its possible uses -food for human and animal consumption and in the production of industrial, pharmaceutical and dietetic products...
Context in source publication
Context 1
... the catch by subarea, the most substantial amount was obtained in Subarea 48.1, contributing to a large part of the catches in 2013. The maximum amount of catch (6,800 t) was obtained in 2014. In Subareas 48.2 and 48.3, the volumes were relatively low, being under 2,300 t per year (Fig. 3). Table 2. The number of trips, fishing period, fishing days and catch performed by FV Betanzos in the krill Euphausia superba fishery (2011)(2012)(2013)(2014)(2015)(2016) (Fig. 4). is observed in the different fishing subareas, with the mode around log 2 kg min -1 . The range observed in Subarea 48.1 shows an approximately symmetric ...
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To implement ecosystem-based approaches to fisheries management, decision makers need insight on the potential costs and benefits of the policy options available to them. In the Southern Ocean, two such options for addressing trade-offs between krill-dependent predators and the krill fishery include "feedback management" (FBM) strategies and marine...
Citations
... Fishing operations were conducted in FAO Statistical Area 48, subdivided into Subareas 48.1 (West Antarctic Peninsula, Bransfield Strait, Gerlache Strait, and the South Shetland Islands), 48.2 (South Orkney Islands), and 48.3 (South Georgia Island) (Fig. 1). Krill fishing trawls were mainly carried out between 20 and 120 m depth, with a small number of hauls at greater depths (Arana et al., 2020). ...
Krill (Euphausia superba) catch is currently the most relevant fishery industry in Antarctic waters. This resource is a keystone species in the Antarctic food web, sustaining the contribution to the trophic ecology of many invertebrate and vertebrate species. To catch krill, part of the fleet in this fishery uses large mid-water nets that also retain a diversity of other organisms like plankton, meroplankton, and fish species as bycatch. Therefore, it is necessary to understand and evaluate the magnitude of this incidental catch, as well as the potential interactions between krill fishing gear with seabirds and mammals. To estimate the composition and extent of bycatch for this fishery included 784 samples of 25 kg and an equal number of 1 kg sub-samples obtained from Antarctic krill catches in Subarea 48, between years 2012 and 2016. A total of 15 fish species were identified along with the record of five other taxa and other unidentified specimens. The most relevant fish species bycaught by weight were mackerel icefish Champsocephalus gunnari, South Georgia icefish Pseudochaenichthys georgianus, and painted notie Lepidonotothen larseni. Additionally, 20 interactions with seabirds and nine interactions with Antarctic fur seals (Arctocephalus gazella) were registered. In the five years of operations, only three seabirds died, and only two individuals of A. gazelle caught by the net were killed.
