CYTOGENETIC COMPARISON OF SOME PINNIPEDS (MAMMALIA - EUTHERIA)
CYTOGENETIC COMPARISON OF SOME PINNIPEDS (MAMMALIA - EUTHERIA)
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DOI：
10.1139/z67-088
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发表时间：
1967-01-01
期刊：
影响因子：
--
通讯作者：
FELTZ, ET
中科院分区：
文献类型：
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作者：
FAY, FH;RAUSCH, VR;FELTZ, ET
本文描述了斑海豹Phoca vitulina （2N = 32）、胡须海豹Erignathus barbatus （2N = 34）、威德尔海豹letonychotes weddelli （2N = 34）、海象Odobenus rosmarus （2N = 32）、虎头海狮Eumetopias jubata （2N = 36）和北方海海豹Callor-hinus ursinus （2N = 36）的核型，并与其他工作者报道的环海豹Pusa hispida和加利福尼亚海狮Zalophus California的核型进行了比较。并结合目前鳍足动物的系统发育和系统学理论进行了讨论。结果表明，代表鳍足动物各科和亚科的8个物种的染色体数量和形态具有显著的相似性。这被解释为密切相互关系的证据，与单系起源理论相称。斑海豹和环斑海豹的核蛋白实际上是相同的，胡须海豹和威德尔海豹以及斯特勒海狮和加利福尼亚海狮的核蛋白也是相同的。海海豹的核型与海狮相似，而海象的核型“在某些方面与phocids相似，在其他方面与otariids相似”。有必要在亚科和属的水平上对鳍足动物进行彻底的比较研究和重新评价。
Karyotypes of the harbor seal, Phoca vitulina (2N = 32), the bearded seal, Erignathus barbatus (2N = 34), the Weddell seal, Leptonychotes weddelli (2N = 34), the walrus, Odobenus rosmarus (2N = 32), the Steller sea lion, Eumetopias jubata (2N = 36), and the northern fur seal, Callor-hinus ursinus (2N = 36), are described and compared with those of the ringed seal, Pusa hispida, and California sea lion, Zalophus Californiaus, reported by other workers. These are discussed with reference to current theories of pinniped phylogeny and systematics. The number and morphology of chromosomes in these 8 species, representing each family and subfamily of pinnipeds, were found to be remarkably similar. This is interpreted as evidence of close interrelationship, commensurate with the theory of monophyletic origin. Karyograms of the harbor seal and ringed seal are virtually identical, as are those of the bearded and Weddell seals and those of the Steller and California sea lions. The karyotype of the fur seal is similar to the sea lions'', while that of the walrus resembles the phocids'' in some ways and the otariids'' in others. A need for thorough comparative studies and reappraisal of pinniped systematics at the subfamilial and generic levels is indicated.