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Photo‐identification has been established as a helpful tool in cetacean research. However, no study to date has attempted to apply this method to short‐beaked common dolphins (Delphinus delphis L.). We present here the results of two studies that were conducted concurrently in Mercury Bay and the Hauraki Gulf on the north‐east coast of New Zealand's North Island. Methods for distinguishing between individual dolphins are discu...
Movement patterns of small cetaceans are influenced by a great number of variables including prey availability, sea floor profile, thermocline, oxygen minimum layer, and sea surface temperature (SST). Presented here are data on short‐beaked common dolphins (Delphinus delphis L.) in New Zealand, showing a seasonal offshore‐shift in their distribution, which appears to be correlated with SST. D. delphis moved from a mean distanc...
Agonistic Behavior in Harbor Seals ( Phoca Vitulina ) in Relation to the Availability of Haul‐out SpaceNARA Subscribed
A bstract The hypothesis that haul‐out space is a contested resource among harbor seals ( Phoca vitulina ) was tested by comparing the number of agonistic interactions and the time devoted to them, at a haul‐out with unlimited space and a haul‐out with limited space, in Humboldt County, California. 798 agonistic interactions were recorded in 160 h of observation. The average number of agonistic interactions per seal per hour a...
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