Bárbara Goulart Costa, Rodrigo Lopes Ferreira, T. G. Pellegrini
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Feeding in the dark: are stonefly nymphs good indicators of reference conditions for cave streams? A case study using gut content analysis in Brazilian quartzite caves
Feeding in the dark: are stonefly nymphs good indicators of reference conditions for cave streams? A case study using gut content analysis in Brazilian quartzite caves Benthic macroinvertebrates are considered important bioindicators of water quality, and their distribution is influenced by several factors, including food availability. This feeding is an essential factor for all living beings and determines aspects of temporal and spatial population dynamics and relations between individuals and their respective habitats. The present work aimed to analyze the diet of nymphs of the order Plecoptera associated with quartzite caves located in southern Minas Gerais state, Brazil. The stomach contents of 79 specimens were analyzed, and many were empty (40.5 %). Among the nymphs with stomach contents, the most frequent content was fine particulate organic matter. The high amount of individuals with empty content may indicate a low tolerance of these organisms to subterranean environments.
期刊介绍：
Limnetica publishes original research articles on the ecology of inland waters. The scope of Limnetica includes the ecology of rivers, lakes, reservoirs, coastal lagoons and wetlands, as well as biogeochemistry, paleolimnology, development of new methodologies, taxonomy, biogeography and any aspect of theoretical and applied continental aquatic ecology such as management and conservation, impact assessment, ecotoxicology and pollution. Limnetica will accept for its publication scientific articles presenting advances in knowledge or technological development, as well as as papers derived from new practical approaches on the topics covered by the journal.
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