The additional food composed of mud and Ephemeroptera
were mainly consumed in wet season and dry season respectively.
In Arthropoda, Crustacea was represented by the order Decapoda and Insecta was represented by eight orders (Diptera, Trichoptera, Plecoptera, Ephemeroptera
, Coleoptera, Odonata, Hemiptera and Megaloptera).
The macroinvertebrate community is closely linked to habitat conditions for example, detritivores are found in organically rich sediments under macrophytes while Ephemeroptera
are characteristic of shallow wave washed smooth habitats (James et al., 1998).
Whereas the community structures of most of the pans consist mainly of crustaceans, the invertebrate fauna at pan 3 is made up of aquatic insects (including many Hemiptera, Ephemeroptera
Los ordenes de macroinvertebrados acuaticos registrados en el riachuelo fueron Trichoptera, dominado por Leptoceridae, Hydropsychidae y Phylopotamidae, Plecoptera (Perlidae), Coleoptera (Elmidae), Ephemeroptera
(Baetidae), Diptera (Tipulidae), Dyctioptera (Blaberidae) y Decapoda (Pseudothelphusidae).
Los ordenes Coleoptera (35%) y Diptera (27%) presentaron el mayor numero de generos, seguido por Trichoptera y Ephemeroptera
(12%) (Figura 1 y Tabla 1).
recorded their complete absence at St III and IV while comparatively more density of ephemeropterans at St I (4.5 ind.[m.sup.-2] [+ or -] 10.71) as compared to St II (2.25 ind.[m.sup.-2] [+ or -] 7.46) was observed.
: range extensions and new Alabama state records.
, Plecoptera, and Trichoptera taxa (EPT)--These taxa are typically less tolerant of perturbation than many other taxa.
The invertebrates were evaluated by the modified Family Biotic Index (FBI) and by percent Ephemeroptera
, Plecoptera, Trichoptera (EPT).
Larvae of Ephemeroptera
(mostly Ephemera vulgata L.) formed a major part of the diet of the smaller perch (TL < 20 cm) when evaluated as a percentage of the stomach content by volume (Fig.