Water temperature influences the shoaling decisions of guppies, Poecilia reticulata, under predation threat
Article Abstract:
Female Trinidadian guppies were studied in the presence of confined cichlids, which represented predation threats. Their behavior varied according to the temperature of the water. At 22 deg C the guppies did not show an special preference for a particular shoal size, but they were more likely to choose a larger shoal when there was a risk from a predator and the temperature was higher, at 26 deg C. The fish preferred smaller shoals when no predator risk existed at the higher temperature. The fish had to balance foraging needs and protection from predators.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1999
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Familiarity leads to female mate preference for novel males in the guppy, Poecilia reticulata
Article Abstract:
Guppies show great variation in the coloring of the males. A study has assessed how far mate selection may be requency dependent. Females were familiarized to males which had one type of color pattern, and then exposed to different types of males. The females were found to selected mates more often if they had novel color patterns, rather than familiar color patterns. The finding back up the hypothesis that mate selection may be frequency dependent.The size of females or males does not appear to be important in mate selection.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1999
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Effects of temperature on anti-predator behaviour in the guppy, Poecilia reticulata
Article Abstract:
Anti-predator behavior in the guppy, Poecilia reticulata, was investigated at cooler and warmer temperatures in the presence and absence of a predator, a cichlid. Higher temperature is associated with a higher degree of vigilance and foraging behavior. Temperature may have directly affected guppies by increasing body temperature and increasing swimming ability or the higher water temperature may have cued guppies of the possibility of a greater predation threat.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1998
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