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| 1. |
INTERSPECIFIC AND INTRASPECIFIC MORPHOLOGICAL VARIATION IN MANATEES (SIRENIA:TRICHECHUS) |
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Marine Mammal Science,
Volume 2,
Issue 2,
1986,
Page 87-144
Daryl P. Domning,
Lee‐Ann C. Hayek,
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摘要:
AbstractThe three living species ofTrichechusare clearly defined and well exemplify the degree of variability and taxonomic value of morphological characters in a well‐understood mammalian genus. Statistical analysis of the largest sample of manatee skulls yet studied has allowed us to identify small suites of characters that effectively distinguish these species. The two subspecies ofT. manatusproposed by Hatt (1934) can likewise be distinguished, and their use as taxonomic categories seems justified. This suggests that the cool winters of the northern Gulf Coast, on the one hand, and the deep water and strong currents of the Straits of Florida, on the other, are effective barriers to gene flow between Florida and Antillean manatees. Alleged taxonomic distinctions withinT. senegalensis, however, have no demonstrated basis. No significant sexual dimorphism was detected in skulls of any of the species. Many interspecific differences can be correlated with feeding ecology, but others remain unexplained. Features of tooth crown morphology are among the most constant characters examined, but some osteological characters are equally good.T. manatasandT. senegalensis(which are phenetically the most similar) also seem to share a more recent common ancestor than either does withT. inunguis.However, the three species probably separated from each other at nearly the same time.T. inunguishas since become the most derived species, whileT. senegalensishas changed the leas
ISSN:0824-0469
DOI:10.1111/j.1748-7692.1986.tb00034.x
出版商:Blackwell Publishing Ltd
年代:1986
数据来源: WILEY
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| 2. |
GROWTH IN YOUNG GRAY WHALES(ESCHRICHTIUS ROBUSTUS) |
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Marine Mammal Science,
Volume 2,
Issue 2,
1986,
Page 145-152
James L. Sumich,
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摘要:
AbstractMean body lengths of gray whale calves were found to increase linearly from 4.6 m at birth to 7 m by weaning at six mo. After weaning, rates of length increase diminish, with calves reaching 8 m by one yr of age and 9 m by two yr. Evaluations of the weights of nine gray whales as functions of their measured lengths and girths reduce the emphasis placed on fast‐induced seasonal variations in girth by Rice and Wolman (1971). From birth weights of just under one metric ton, calves double their weights by three mo of age and double again by weaning at six m
ISSN:0824-0469
DOI:10.1111/j.1748-7692.1986.tb00035.x
出版商:Blackwell Publishing Ltd
年代:1986
数据来源: WILEY
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| 3. |
THE INTERNATIONAL CODE OF ZOOLOGICAL NOMENCLATURE AND A PARADIGM: THE NAMEPHYSETER CATODONLINNAEUS 1758 |
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Marine Mammal Science,
Volume 2,
Issue 2,
1986,
Page 153-157
William E. Schevill,
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ISSN:0824-0469
DOI:10.1111/j.1748-7692.1986.tb00036.x
出版商:Blackwell Publishing Ltd
年代:1986
数据来源: WILEY
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| 4. |
TheFirstReport ofZalophusCalifornianusinAcapulco, Mexico |
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Marine Mammal Science,
Volume 2,
Issue 2,
1986,
Page 158-158
Juan Pablo Gallo‐R,
Alfredo Ortega‐O,
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ISSN:0824-0469
DOI:10.1111/j.1748-7692.1986.tb00037.x
出版商:Blackwell Publishing Ltd
年代:1986
数据来源: WILEY
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| 5. |
Books |
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Marine Mammal Science,
Volume 2,
Issue 2,
1986,
Page 159-163
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摘要:
Book reviews in this article:Studies ofSeaMammals inSouthLatitudes. J. K. Ling and M. M. Bryden (eds.).Exploitation ofMarineCommunities. R. M. May (ed.).Handbook ofMarineMammals. Volume 3. The Sirenians and Baleen Whales. Sam H. Ridgway and Richard Harrison (eds.).InternationalRegulation ofWhaling: FromConservation ofWhalingFromConservation ofWhales andRegulation ofWhale‐Watching. Vols. 1 and 2. Patricia Birnie (ed.).MarineMammals andFisheries. J. R. Beddington, R. J. H. Beverton and D. M. Lavigne (eds.).TheElements ofGraphingData. William S. Clevelan
ISSN:0824-0469
DOI:10.1111/j.1748-7692.1986.tb00038.x
出版商:Blackwell Publishing Ltd
年代:1986
数据来源: WILEY
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