Predator-recognition training: a conservation strategy to increase postrelease survival of hellbenders in head-starting programs
For species with declining populations, captive rearing with subsequent release into natural habitats (“head-starting”) is often used as part of a conservation strategy. One challenge to head-starting programs is that head-started individuals can suffer high rates of postrelease predation. Head-starting programs are currently being established for hellbenders (Cryptobrancus alleganeinsis), large aquatic salamanders that are experiencing […]
Responses of mink to auditory stimuli: Prerequisites for applying the ‘cognitive bias’ approach
The aim of the study was to determine and validate prerequisites for applying a cognitive (judgement) bias approach to assessing welfare in farmed mink (Neovison vison). We investigated discrimination ability and associative learning ability using auditory cues. The mink (n = 15 females) were divided into two groups (High, n = 8; Low, n = […]
Individual differences in anticipatory activity to food rewards predict cue-induced appetitive 50-kHz calls in rats
Reward-related stimuli come to acquire incentive salience through Pavlovian learning and become capable of controlling reward-oriented behaviors. Here, we examined individual differences in anticipatory activity elicited by reward-related cues as indicative of how animals attribute incentive salience to otherwise neutral stimuli. Since adult rats can signal incentive motivation states through ultrasonic vocalizations (USVs) at around […]