Angiotensin (Ang) II upregulates body fluid volume in vertebrates; however, it produces varying effects in invertebrates. Ang II upregulates body fluid volume in clam worms and slugs organisms), but downregulates it in downregulating effect of Ang II in leeches is caused by their blood effects of Ang I and Ang II on body fluid volume in the freshwater sludge worm, (Annelida, Oligochaeta, Tubifi...

This study investigated the effect of main physicochemical factors in structuring aquatic macroinvertebrate assemblages three streams northern Tunisia. Aquatic and water surveys were carried out seasonally 2013, at pristine sites altered located, respectively, upstream downstream parts investigated. Macroinvertebrates sampled using a kick net Surber net, eight measured same time. Both biotic ab...

Aquatic oligochaetes have long been appreciated for their value in assessing habitat quality because they are ubiquitous sediment-dwelling filter feeders. Many oligochaete taxa are also important in the transmission of fish diseases. Distinguishing resistant and susceptible taxa is important for managing fish disease, yet challenging in practice. Tubifex tubifex (Oligochaeta: Tubificidae) is th...

Naidinae (former Naididae) is a group of small aquatic clitellate annelids, common worldwide. In this study, we evaluated the phylogenetic status of Naidinae, and examined the phylogenetic relationships within the group. Sequence data from two mitochondrial genes (12S rDNA and 16S rDNA), and one nuclear gene (18S rDNA), were used. Sequences were obtained from 27 naidine species, 24 species from...

Biomonitoring is a cheap and effective tool for evaluation of water quality, and infer on the balance of aquatic ecosystems. The benthic macroinvertebrates are bioindicators sensitive to environmental changes, and can assist in detecting and preventing impacts such as organic enrichment and imbalance in the food chain. We compared the structure of benthic communities on artificial substrate sam...