Renzo Rolleri's research while affiliated with Pontificia Universidad Católica de Valparaíso and other places

... For the 2018/19 season, fishing for toothfish and other fin-fish was still prohibited in subarea 48.1 with exceptions for research purposes (CCAMLR, 2018). Subarea 48.1 at time of writing was mainly used for krill (Euphausiacea) fisheries via midwater trawling, where macrourids are not common by-catch (Watters, 1996;Arana and Rolleri, 2020). Although, the three carcasses are unlikely to originate from krill fishery by-catch, it is possible that they resulted from fisheries, in particular since fishing vessels were present close to the study location on the day the carcasses were found (Figure 1). ...

... Driven by the different environmental conditions in the area, and based on their own latitudinal distribution, the fish fauna consists primarily of low-Antarctic species, such as nototheniids (Notothenia, Gobionotothen and Lepidonotothen) and some channichthyids, and high-Antarctic species, such as nototheniids (Trematomus) and bathydraconids that are abundant in waters deeper than 300 m but of negligible biomass (Kock and Stransky 2000). Based on several trawl surveys carried out in this area in the last two decades, the species composition and their relative abundance are relatively well-known Jones et al. 2003;Arana et al. 2020). Nevertheless, the use of benthic trawling as investigating methodology inherently do not allow to document-specific habitat preferences and fish behaviour. ...

... 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). ...