XXIII.—Chromosome Number in the Blue, Fin and Sperm Whales
Synopsis Testicular material from a Blue Whale ( Balœnoptera musculus Rafinesque), a Fin Whale ( Balœnoptera physalus Lacepède) and a Sperm Whale ( Physeter catodon L.), obtained 6–24 hours after death in the Antarctic during the whaling season 1946–47, showed that the testes of the first two animal...
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Language: | English |
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1955
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Online Access: | http://dx.doi.org/10.1017/s0080455x00014661 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0080455X00014661 |
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crcambridgeupr:10.1017/s0080455x00014661 2024-03-03T08:38:34+00:00 XXIII.—Chromosome Number in the Blue, Fin and Sperm Whales Nowosielski-Slepowron, B. J. A. Peacock, A. D. 1955 http://dx.doi.org/10.1017/s0080455x00014661 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0080455X00014661 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Proceedings of the Royal Society of Edinburgh. Section B. Biology volume 65, issue 3, page 358-368 ISSN 0080-455X 2053-5937 General Engineering journal-article 1955 crcambridgeupr https://doi.org/10.1017/s0080455x00014661 2024-02-08T08:28:44Z Synopsis Testicular material from a Blue Whale ( Balœnoptera musculus Rafinesque), a Fin Whale ( Balœnoptera physalus Lacepède) and a Sperm Whale ( Physeter catodon L.), obtained 6–24 hours after death in the Antarctic during the whaling season 1946–47, showed that the testes of the first two animals were in the resting state and those of the third animal were active. Despite being collected some hours after death, the material has allowed estimation to be made for the first time of chromosome numbers from spermatogonia and spermatocytes in the prophase stage. The diploid and haploid numbers approximate to 48 and 24 respectively. These results are discussed along with those obtained by Makino (1948), the first worker to record counts of cetacean chromosomes, in his study of freshly fixed material from Dall's Porpoise, Phocœnoides dallii (True). They support this worker in his view that the cytological evidence indicates that Cetacea and Ungulata derive from a common source. Some observations on spermateleosis and cell inclusions in the Sperm Whale are given. Regarding the breeding season, the findings of previous workers are supported for the Blue and Fin Whales. That the Sperm Whale dealt with in this paper was found to be sexually active in December is support of Harrison-Matthews' view that the species has no definite sexual season or cycle. Article in Journal/Newspaper Antarc* Antarctic Blue whale Fin whale Sperm whale Cambridge University Press Antarctic Catodon ENVELOPE(-59.966,-59.966,-63.500,-63.500) The Antarctic Proceedings of the Royal Society of Edinburgh. Section B. Biology 65 3 358 368 |
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Open Polar |
collection |
Cambridge University Press |
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crcambridgeupr |
language |
English |
topic |
General Engineering |
spellingShingle |
General Engineering Nowosielski-Slepowron, B. J. A. Peacock, A. D. XXIII.—Chromosome Number in the Blue, Fin and Sperm Whales |
topic_facet |
General Engineering |
description |
Synopsis Testicular material from a Blue Whale ( Balœnoptera musculus Rafinesque), a Fin Whale ( Balœnoptera physalus Lacepède) and a Sperm Whale ( Physeter catodon L.), obtained 6–24 hours after death in the Antarctic during the whaling season 1946–47, showed that the testes of the first two animals were in the resting state and those of the third animal were active. Despite being collected some hours after death, the material has allowed estimation to be made for the first time of chromosome numbers from spermatogonia and spermatocytes in the prophase stage. The diploid and haploid numbers approximate to 48 and 24 respectively. These results are discussed along with those obtained by Makino (1948), the first worker to record counts of cetacean chromosomes, in his study of freshly fixed material from Dall's Porpoise, Phocœnoides dallii (True). They support this worker in his view that the cytological evidence indicates that Cetacea and Ungulata derive from a common source. Some observations on spermateleosis and cell inclusions in the Sperm Whale are given. Regarding the breeding season, the findings of previous workers are supported for the Blue and Fin Whales. That the Sperm Whale dealt with in this paper was found to be sexually active in December is support of Harrison-Matthews' view that the species has no definite sexual season or cycle. |
format |
Article in Journal/Newspaper |
author |
Nowosielski-Slepowron, B. J. A. Peacock, A. D. |
author_facet |
Nowosielski-Slepowron, B. J. A. Peacock, A. D. |
author_sort |
Nowosielski-Slepowron, B. J. A. |
title |
XXIII.—Chromosome Number in the Blue, Fin and Sperm Whales |
title_short |
XXIII.—Chromosome Number in the Blue, Fin and Sperm Whales |
title_full |
XXIII.—Chromosome Number in the Blue, Fin and Sperm Whales |
title_fullStr |
XXIII.—Chromosome Number in the Blue, Fin and Sperm Whales |
title_full_unstemmed |
XXIII.—Chromosome Number in the Blue, Fin and Sperm Whales |
title_sort |
xxiii.—chromosome number in the blue, fin and sperm whales |
publisher |
Cambridge University Press (CUP) |
publishDate |
1955 |
url |
http://dx.doi.org/10.1017/s0080455x00014661 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0080455X00014661 |
long_lat |
ENVELOPE(-59.966,-59.966,-63.500,-63.500) |
geographic |
Antarctic Catodon The Antarctic |
geographic_facet |
Antarctic Catodon The Antarctic |
genre |
Antarc* Antarctic Blue whale Fin whale Sperm whale |
genre_facet |
Antarc* Antarctic Blue whale Fin whale Sperm whale |
op_source |
Proceedings of the Royal Society of Edinburgh. Section B. Biology volume 65, issue 3, page 358-368 ISSN 0080-455X 2053-5937 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0080455x00014661 |
container_title |
Proceedings of the Royal Society of Edinburgh. Section B. Biology |
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65 |
container_issue |
3 |
container_start_page |
358 |
op_container_end_page |
368 |
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1792506977160527872 |