Ovaries were taken from five sexually mature amphipods: Gammarus fossarum, Gammarus pulex, Gammarus roeseli, Hyallela azteca and Parhyale hawaiensis. The soluble proteome extracted from individual pair of ovaries from five biological replicates was trypsin digested and the resulting peptides were analyzed by high resolution tandem mass spectrometry. The spectra were assigned with four protein s...

The water strider Limnogonus fossarum fossarum (F.) (Hemiptera: Gerridae) shows a macropterous, micropterous, and apterous polymorphism. Although a long photoperiod condition induces winged morphs, preliminary studies have revealed that crossing between winged morphs increased the proportion of macropterous individuals, suggesting that the genetic factors also affect wing-morph determination in...

The present study focuses on the sensitivity among freshwater invertebrate species to acidic stress. Three common macroinvertebrate species in the Vosges Mountains (North-Eastern France), Gammarus fossarum (Amphipoda), Hydropsyche pellucidula (Trichoptera) and Dinocras cephalotes (Plecoptera) were exposed for 24, 72 and 120 h to natural acidified water (pH=4.73+/-0.08, [Ca2+]=39.1+/-0.6 micromo...

Elephantis, new genus, is established for Caridina natalensis Bouvier, 1925 hitherto known only from South Africa with one male specimen. Recently, three surveys by electric fishing (2004, 2008 and 2010) of some eastern rivers from Madagascar have permitted to discover numerous specimens of this species. Caridina natalensis is different from all other known species of Caridina by its remarkably...

Ancient Lake Poso on the Indonesian island Sulawesi hosts a highly diverse endemic fauna, including a small species flock of atyid Caridina shrimps, which are characterized by conspicuous colour patterns. We used a mtDNA based molecular phylogeny to test the assumption of a monophyletic origin and intralacustrine radiation of the species flock and to assess the species specificity of some colou...

Johnson (1963) attempted to review the 'Caridina nilotica complex' established by Bouvier (1925) and as a result considered several distinct freshwater shrimp species from Indo-West Pacific region as junior synonyms of C. simoni Bouvier, 1904. However, Tiwari and Pillai (1971) indicated the need to clarify the taxonomical status of the many synonyms created by Johnson (1963). Therefore, type an...

Dispersal abilities and the resulting levels of connectivity between streams influence population structure in aquatic organisms. We investigated how different dispersal life-history traits affect gene flow three invertebrate species a central European mountain range. used microsatellite markers mitochondrial cytochrome oxidase I barcode data to assess small-scale mayfly Baetis alpinus, stonefl...

Invitation You are kindly invited to attend the public defense of my thesis which will take place on Wednesday January 22, 2014 at 12:45 in Berkhoff zaal-WA4 in the Waaier building at the University of Twente. The defense will be followed by a reception in the same building. Invitation You are kindly invited to attend the public defense of my thesis which will take place on Wednesday January 22...

We investigated the suitability of an active biomonitoring approach, using the ecologically relevant species Gammarus fossarum, to assess trends of bioavailable contamination in continental waters. Gammarids were translocated into cages at 27 sites, in the Rhône-Alpes region (France) during early autumn 2009. Study sites were chosen to represent different physico-chemical characteristics and va...

Enhanced growth and survival indicate a quality diet important in the production of fish larvae. Diet’s heavily depends on its protein which varies with inclusion levels sources. This Influences stress responses compromises wellbeing larvae due to diets suboptimal provision nutritional requirements. However, there exists knowledge gap performance different proteins beyond survival. The objectiv...