Seasonal diet shift in a Tetragonopterinae (Oateichthyes, Characidae) from the Ubatiba river, RJ, Brazil
Braz. j. biol
;
63(1): 69-74, Feb. 2003. tab, graf
Article
in English
| LILACS
| ID: lil-343403
RESUMO
In the present study, we describe feeding habits of Deuterodon sp. from the Ubatiba River and explore if diet changes according to a temporal cycle of dry and wet seasons. We observed that Deuterodon sp. fed on an extremely high diversity of items ranging from organic matter, sediment (sand plus quartz parts), algae, seeds and leaves to animal organisms, such as, crustaceans, oligochaets and several life stages of terrestrial and aquatic insects, indicating an omnivorous diet. An important shift in the use of feeding resources was also registered; animal and vegetal items had alternated importance between both seasons. Allochthonous vs. autochthonous items analysis showed predominance of allochthonous items during dry season while no significant differences were registered during wet season
Full text:
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Index:
LILACS (Americas)
Main subject:
Diet
/
Feeding Behavior
/
Fishes
/
Gastrointestinal Contents
Limits:
Animals
Country/Region as subject:
South America
/
Brazil
Language:
English
Journal:
Braz. j. biol
Journal subject:
Biology
Year:
2003
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Universidade do Estado do Rio de Janeiro/BR
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