Distribution of Delphinidae (Cetacea) in relation to sea surface temperatures off Eastern and Southern New Zealand |
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| Authors: | D E Gaskin |
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| Institution: | Department of Zoology , Massey University , Palmerston North |
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| Abstract: | Records of four species of Delphinidae, Delphinus delphis, Lissodelphis peroni, Lagenorhynchus obscurus, and Lagenorhynchus cruciger in waters to the east and south‐east of New Zealand are discussed in relation to surface temperatures. In this region D. delphis appears to be largely confined north of the Subtropical Convergence and a minimum surface temperature of about 14°c, and near New Zealand from Hawke Bay southward in the warm water of the East Cape Current; L. peroni to the Subtropical Convergence and the subantarctic water to the south of it, between surface temperatures of 9°c and 16°c; L. obscurus to the immediate vicinity of the Subtropical Convergence and surface temperatures in summer of about 14° to 15°c, and L. cruciger across the Antarctic Convergence region, in a surface temperature range of 2° to 9°c. |
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| Keywords: | estradiol‐17β progesterone 5‐hydroxytryptamine ovary brain ganglia thoracic ganglia Panulirus homarus |
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