Observations on the Electric Lance and the Welfare of Whales: A Critical Appraisal
Abstract Japanese whalers use the electric lance as a secondary method of killing minke whales (Balaenoptera acutorostrata) . The lances are dropped into the body, and currents varying between 2.2 and 14. OA, with a mean of 6.8A, are applied. When currents of 5A were applied to the carcasses of dead...
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Cambridge University Press (CUP)
1997
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Online Access: | http://dx.doi.org/10.1017/s0962728600019382 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0962728600019382 |
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crcambridgeupr:10.1017/s0962728600019382 2023-06-11T04:10:27+02:00 Observations on the Electric Lance and the Welfare of Whales: A Critical Appraisal Blackmore, D K Madie, P Barnes, G R G 1997 http://dx.doi.org/10.1017/s0962728600019382 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0962728600019382 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Animal Welfare volume 6, issue 1, page 43-51 ISSN 0962-7286 2054-1538 General Veterinary General Biochemistry, Genetics and Molecular Biology Animal Science and Zoology journal-article 1997 crcambridgeupr https://doi.org/10.1017/s0962728600019382 2023-05-01T18:20:02Z Abstract Japanese whalers use the electric lance as a secondary method of killing minke whales (Balaenoptera acutorostrata) . The lances are dropped into the body, and currents varying between 2.2 and 14. OA, with a mean of 6.8A, are applied. When currents of 5A were applied to the carcasses of dead whales, varying in size from 1.8 to 15.7m in length, no current densities induced in the target organs were sufficient to cause either insensibility (10mA cm −2 in the brain), or to cause ventricular fibrillation (0.5mA cm −2 in the heart), except in a few cases where electrodes were specifically placed to span the heart. When electrodes were placed in positions normally used in whaling operations, no current densities were produced which would have been sufficient to cause brain and cardiac dysfunction. Further investigations on changes in current density with time post mortem after application of a controlled current of 5A showed, during a 60 hour period, a fourfold increase in the current density in the heart, and more than a twofold increase in the brain. Thus contrary to previous criticisms, if these studies had been carried out on live animals, all current densities would have been below threshold values. There are no records of signs of epileptic form seizure, which are associated with an effective electrical stun, in whales subjected to the electric lance. It is concluded that the electric lance as used in whaling operations is ineffective and likely to cause extra pain and suffering to an already distressed animal. Article in Journal/Newspaper Balaenoptera acutorostrata Cambridge University Press (via Crossref) Animal Welfare 6 1 43 51 |
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Cambridge University Press (via Crossref) |
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language |
English |
topic |
General Veterinary General Biochemistry, Genetics and Molecular Biology Animal Science and Zoology |
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General Veterinary General Biochemistry, Genetics and Molecular Biology Animal Science and Zoology Blackmore, D K Madie, P Barnes, G R G Observations on the Electric Lance and the Welfare of Whales: A Critical Appraisal |
topic_facet |
General Veterinary General Biochemistry, Genetics and Molecular Biology Animal Science and Zoology |
description |
Abstract Japanese whalers use the electric lance as a secondary method of killing minke whales (Balaenoptera acutorostrata) . The lances are dropped into the body, and currents varying between 2.2 and 14. OA, with a mean of 6.8A, are applied. When currents of 5A were applied to the carcasses of dead whales, varying in size from 1.8 to 15.7m in length, no current densities induced in the target organs were sufficient to cause either insensibility (10mA cm −2 in the brain), or to cause ventricular fibrillation (0.5mA cm −2 in the heart), except in a few cases where electrodes were specifically placed to span the heart. When electrodes were placed in positions normally used in whaling operations, no current densities were produced which would have been sufficient to cause brain and cardiac dysfunction. Further investigations on changes in current density with time post mortem after application of a controlled current of 5A showed, during a 60 hour period, a fourfold increase in the current density in the heart, and more than a twofold increase in the brain. Thus contrary to previous criticisms, if these studies had been carried out on live animals, all current densities would have been below threshold values. There are no records of signs of epileptic form seizure, which are associated with an effective electrical stun, in whales subjected to the electric lance. It is concluded that the electric lance as used in whaling operations is ineffective and likely to cause extra pain and suffering to an already distressed animal. |
format |
Article in Journal/Newspaper |
author |
Blackmore, D K Madie, P Barnes, G R G |
author_facet |
Blackmore, D K Madie, P Barnes, G R G |
author_sort |
Blackmore, D K |
title |
Observations on the Electric Lance and the Welfare of Whales: A Critical Appraisal |
title_short |
Observations on the Electric Lance and the Welfare of Whales: A Critical Appraisal |
title_full |
Observations on the Electric Lance and the Welfare of Whales: A Critical Appraisal |
title_fullStr |
Observations on the Electric Lance and the Welfare of Whales: A Critical Appraisal |
title_full_unstemmed |
Observations on the Electric Lance and the Welfare of Whales: A Critical Appraisal |
title_sort |
observations on the electric lance and the welfare of whales: a critical appraisal |
publisher |
Cambridge University Press (CUP) |
publishDate |
1997 |
url |
http://dx.doi.org/10.1017/s0962728600019382 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0962728600019382 |
genre |
Balaenoptera acutorostrata |
genre_facet |
Balaenoptera acutorostrata |
op_source |
Animal Welfare volume 6, issue 1, page 43-51 ISSN 0962-7286 2054-1538 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0962728600019382 |
container_title |
Animal Welfare |
container_volume |
6 |
container_issue |
1 |
container_start_page |
43 |
op_container_end_page |
51 |
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1768384843190632448 |