Diet and functional feeding groups of Chironomidae (Diptera) in the Middle Paraná River floodplain (Argentina)

Iheringia. Série Zoologia

M. Celeste Galizzi²  Florencia Zilli¹  Mercedes Marchese² 

[1] ,UNL Facultad de Humanidades y Ciencias Santa Fe,Argentina

关键词: Gut content;    niche overlap;    Chironominae;    Tanypodinae;    Contenido intestinal;    solapamiento de nichos;    Chironominae;    Tanypodinae;   

DOI  :  10.1590/S0073-47212012000200001

来源: SciELO

【 摘 要 】

The gut contents of nine genera of benthic Chironominae and Tanypodinae from the Middle Paraná River floodplain habitats (a lake and a secondary channel) were analyzed to determine their feeding patterns and functional feeding groups. Amorphous detritus, animal and vegetal tissues, and mineral materials (predominantly sand) were observed in the larval guts. Amorphous detritus were the main food item found for Polypedilum (Tripodura) sp., Chironomus gr. decorus sp., Endotribelos sp., Phaenopsectra sp., Cladopelma sp., and Pelomus sp. (Chironominae), while animal tissues (mainly oligochaetes) were the most important food item found for Ablabesmyia (Karelia) sp., Coelotanypus sp., and Procladius sp. (Tanypodinae). Dietary overlap was calculated for all pairs of genera. Within predators, the highest overlap was obtained between Coelotanypus sp. and Ablabesmyia (Karelia) sp., while within detritivores the highest niche overlap was obtained between Endotribelos sp. and Phaenopsectra sp.

【 授权许可】

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