Antarctic fish by-catch observation during krill fishing cruise onboard polish trawler Dalmor II (March to July 2011)
Citation
Vishnyakova K (2016): Antarctic fish by-catch observation during krill fishing cruise onboard polish trawler Dalmor II (March to July 2011). v1.7. Ukrainian Scientific Centre of Ecology of the Sea (UkrSCES). Dataset/Occurrence. http://gp.sea.gov.ua:8082/ipt/resource?r=fish_data_krill_fishing_antarctic&v=1.7 https://doi.org/10.15468/i46lma accessed via GBIF.org on 2021-12-12. accessed via GBIF.org on 2023-10-16. accessed via GBIF.org on 2024-08-25.Description
359 Antarctic krill catches were analysed for by-catch, it took 48.5% of observed catches and 31.3% of total catches. Fish by-catches were usual in the sector 48.1 (89.1% of cases); the most of by-caught fishes belonged to families Nototheniidae (NOX) (66.3%). Fish by-catches in the sector 48.2 were recorded in 50% examined catches; the most frequent were fishes of families Myctophidae (LXX).Sampling Description
Study Extent
statistical subarea 48.2;Sampling
In order to quantify the by-catch of fish of a range of sizes, the following sorting method uses a standard sub-sampling approach that allows the user to re-sort smaller samples to ensure that small/larval fish, that may go undetected in larger samples, are recorded appropriately. 1. Ensuring all large fish removed from conveyor during this haul/time period are retained for subsequent weighing and identification. 2. Taking a 25 kg sample, remove all fish and record the total mass of each fish species. 3. Taking a 10 kg sub-sample from the remaining krill sample. 4. Sorting carefully through the 10 kg sub-sample and remove and record the total mass of each fish species. 5. Taking two 1 kg sub-samples from the remaining krill sample. 6. Sorting through each of these 1 kg sub-samples and remove and record the total mass of any remaining fish species (paying particular attention to larval fish that may be transparent).Method steps
Additional info
marine, harvested by iOBISTaxonomic Coverages
Geographic Coverages
359 Antarctic krill catches were analysed for by-catch, it took 48.5% of observed catches and 31.3% of total catches. Fish by-catches were usual in the sector 48.1 (89.1% of cases); the most of by-caught fishes belonged to families Nototheniidae (NOX) (66.3%). Fish by-catches in the sector 48.2 were recorded in 50% examined catches; the most frequent were fishes of families Myctophidae (LXX).
Bibliographic Citations
Contacts
Karina Vishnyakovaoriginator
position: Scientific Researcher
UkrSCES
89, Frantsuzskyi blvd.
Odessa
65009
UA
email: karinavishnyakova@gmail.com
Karina Vishnyakova
metadata author
position: Scientific Researcher
UkrSCES
89, Frantsuzskyi blvd.
Odessa
65009
UA
email: karinavishnyakova@gmail.com
Karina Vishnyakova
administrative point of contact
position: Scientific Researcher
UkrSCES
89, Frantsuzskyi blvd.
Odessa
65009
UA
email: karinavishnyakova@gmail.com
Oleksandr Neprokin
administrative point of contact
position: Head of Department
UkrSCES
89, Frantsuzskyi blvd.
Odessa
65009
UA
email: o.neprokin@gmail.com
Oleksandr Lepyoshkin
administrative point of contact
position: Scientific Researcher
UkrSCES
89, Frantsuzskyi blvd.
Odessa
65009
UA
email: cephei7@gmail.com