Detritivory in two Amazonian fish species

In floodplain lakes of Central Amazon, the siluriform Liposarcus pardalis and the characiform Prochilodus nigricans consumed detritus with different compositions. Most of the diet of L. pardalis and P. nigricans was made of amorphous organic matter. The food ingested by L. pardalis had relatively hi...

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Bibliographic Details
Published in:Journal of fish biology 1998-06, Vol.52 (6), p.1141-1153
Main Authors: Yossa, M. I., Araujo-Lima, C. A. R. M.
Format: Article
Language:English
Subjects:
Agnatha. Pisces
Amazon
Animal and plant ecology
Animal, plant and microbial ecology
Animals
Autoecology
Biological and medical sciences
detritus
feeding
fish
Fundamental and applied biological sciences. Psychology
Liposarcus pardalis
nutrition
Prochilodus nigricans
protein
Vertebrata
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Summary:In floodplain lakes of Central Amazon, the siluriform Liposarcus pardalis and the characiform Prochilodus nigricans consumed detritus with different compositions. Most of the diet of L. pardalis and P. nigricans was made of amorphous organic matter. The food ingested by L. pardalis had relatively higher organic matter (OM) (35–55%) and crude protein (10–19%) than that found in P. nigricans stomachs (10–20% and 2–5%, respectively). Both fish ingested higher quantities of OM and crude protein during the high‐water season. The differences between the two species seem to be related to their ability to select different detrital components. Striking differences were also found in the digestibility rate of OM and protein between the two species. Prochilodus nigricans assimilated only 2·3% of its intake compared with 24% in L. pardalis.
ISSN:0022-1112
1095-8649
DOI:10.1111/j.1095-8649.1998.tb00961.x