Rush and grab strategies in foraging marine endotherms: the case for haste in penguins
The speed at which air-breathing marine predators that forage by diving should swim is likely to depend on a variety of factors that differ substantially from those relevant in animals for hich access to oxygen is unlimited. We used loggers attached to free-living penguins to examine the speed at which three species swam during periods […]
Categorization of natural stimuli by monkeys (macaca mulatto)- effects of stimulus set size and modification of exemplars
The concept humans was studied in two experiments on rhesus monkeys, in each of which a two-choice simultaneous discrimination procedure was used. In Experiment 1, the choice was between scenes with humans and scenes without humans, with the slide set sizable enough that a large number of trials could be given without repeating any individual […]
A comparative study of the speeds attained by captive cheetahs during the enrichment practice of the “cheetah run”
The enrichment practice of the “cheetah run” is becoming increasingly popular within zoological institutions as a method to enrich captive cheetahs. A lure moving at speed represents an artificial prey item that the cursorial cheetah can pursue, therefore allowing it to perform an important hunting behavior within a captive setting. This study was conducted in […]