Trophic polymorphism and water clarity in northern Australian Scortum (Pisces: Terapontidae)

Davis AM, Pusey BJ. Trophic polymorphism and water clarity in northern Australian Scortum (Pisces: Terapontidae).
Ecology of Freshwater Fish 2010: 19: 638-643. © 2010 John Wiley & Sons A/S Abstract - The diets and relative intestinal length of two typically herbivorous terapontid fish from contr...

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Bibliographic Details
Published in:Ecology of freshwater fish 2010-12, Vol.19 (4), p.638-643
Main Authors: Davis, A.M, Pusey, B.J
Format: Article
Language:English
Subjects:
diet shift
Freshwater
intestinal length
Pisces
riverine
Scortum
turbidity
water quality
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Summary:Davis AM, Pusey BJ. Trophic polymorphism and water clarity in northern Australian Scortum (Pisces: Terapontidae).
Ecology of Freshwater Fish 2010: 19: 638-643. © 2010 John Wiley & Sons A/S Abstract - The diets and relative intestinal length of two typically herbivorous terapontid fish from contrasting high and low clarity environments were compared. Fish of both species collected from high clarity habitats were almost exclusively herbivorous, whereas conspecifics from low clarity habitats were omnivores. Relative intestinal lengths in both species were significantly shorter in low clarity environments. Pronounced contrasts in water transparency have the apparent capacity to produce dietary niche shifts in these two species that in turn induce and maintain trophic polymorphisms in a riverine environment.
ISSN:0906-6691
1600-0633
DOI:10.1111/j.1600-0633.2010.00448.x