An assessment of the impact of the krill fishery on penguins
An assessment of the competition between the Japanese krill (Euphausia superba) fishery and penguins during the penguins ' breeding season (December to March) in the South Shetland Islands (Subarea 48.1) was made based on available information on the fishery, penguins and krill. The krill catch...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Text |
| Language: | English |
| Published: |
1994
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| Subjects: | |
| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.474.1677 http://archive.ccamlr.org/ccamlr_science/Vol-01-1994/08ichii-etal.pdf |
| Summary: | An assessment of the competition between the Japanese krill (Euphausia superba) fishery and penguins during the penguins ' breeding season (December to March) in the South Shetland Islands (Subarea 48.1) was made based on available information on the fishery, penguins and krill. The krill catch is very low in December while the catch rate for the following three months is roughly constant (3 000 to 10 000 tonnes/lO-day period) due to an increase in fishing intensity in areas closer to the northern shelf of either Livingston or Elephant Island. In contrast, food consumption by penguins is estimated to be high to the north of King George, Nelson and Robert Islands (9 746 tonnes/lO-day period), and around Low (6 102 tonnes/lO-day period) and Clarence (5 663 tonnes/lO-day period) Islands, but small to the north of Livingston (1 921 tonnes/lO-day period) and Elephant (1 991 tonnes/lO-day period) Islands. Thus, the overlap between the main fishing and foraging areas is insignificant and implies a low level of competition between the fishery and penguins. Krill biomass was estimated to be as large as 200 to 1 500 X 103 tonnes within the preferred fishing areas during the breeding season. |
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