Harbour seal vigilance decreases over time since haul out
Article Abstract:
The harbor seals (Phoca vitulina) are less vigilant with the passage of time after their haul out, on haul-out sites. The initial scanning time of the animals decreases as the size of the group increases. The scanning time of newly hauled-out seals is significantly longer than that of the seals who have spent more time on the beach. The activity of individual animals within a group depends on their position in the group. Animals in the center scan lesser than those at the periphery. This explains the lesser vigilance in larger groups which have fewer members on the periphery.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1996
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Sexually selected vigilance behaviour of the grey partridge is affected by plama androgen levels
Article Abstract:
A study was conducted on the influence of plasma androgen concentrations on grey partridge (Perdix perdix) sexually selected vigilance behavior. Calling activity and vigilance levels were compared for partridges with implanted testosterone and control males. Results reveal that testosterone-implanted males exhibit heightened vigilance behavior than controls. Results suggest that testosterone links male quality, physical condition and sexual selection behaviors.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1997
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A cost of viviparity and parental care in scorpions: reduced sprint speed and behavioural compensation
Article Abstract:
Female scorpions of the Centruroides vittatus species experience a cost in terms of decreased running speed, to viviparity and parental care. Some females reduce this cost by using alternative defensive strategies. The sprint speed of C. vittatus is lowest when the females are carrying their offspring as compared to pregnant and post-dispersal females. Sixty-five percent of the females carrying young cannot run and adopt defensive postures during predation.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1996
User Contributions:
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