crustacean hemocyanins represent a unique case of molecular heterogeneity among oxygen-carrying proteins. two populations of gammarus lacustris and six populations of gammarus komareki were identified and isolated from aquatic habitats of ardabil (northwest of iran). the populations were nominated based on name of isolated region. principal component analysis of morphological absolute attribute...

Amphipods are keystone species in many freshwater ecosystems. Understanding their distribution and diversity is crucial to ensure and preserve freshwater ecosystem functioning, particularly in the northern hemisphere. For the European Alps information on amphipods has been relatively limited until recently. We describe a new, widely distributed amphipod species, Gammarus alpinus sp. nov., found...

Nutritional, behavioral, and diet data for lesser scaup (Aythya affinis [Eyton, 1838]) indicates that there has been a decrease in amphipod (Gammarus lacustris [G. O. Sars, 1863] and Hyalella azteca [Saussure, 1858]) density and wetland quality throughout the upper-Midwest, USA. Accordingly, we estimated densities of Gammarus and Hyalella in six eco-physiographic regions of Iowa, Minnesota, and...

— The spring condition hypothesis (SCH) states that the current decline of the North American scaup population (Lesser [ Aythya affinis ] and Greater Scaup [ A. marila ] combined) is due to a decline in quality or availability of scaup foods on wintering, spring migration, or breeding areas that has caused a reduction in female body condition and subsequent reproductive success. Our previous re...

: A three-tiered approach involving autoradiography, measurement of seasonal lipid patterns and deployment of in situ microcosms, was used to assess the potential of the moderately lipophilic herbicide triallate to accumulate in two amphipod species (Hyalella azteca and Gammarus lacustris) in two prairie lakes and one prairie pond. Autoradiography revealed that the storage sites for triallate i...

The amphipod fauna of Central Europe has changed dramatically over the last century. This change increased past 30 years. dynamic is well documented in northeast Germany. study places it a landscape-ecological context. An example displacement Gammarus lacustris G.O. Sars, 1864, circumpolar species with variety habitats, but relegated to relic habitats. turns out be very weak competitor. Already...

Microplastics have been documented in aquatic and terrestrial ecosystems throughout the world. However, few studies investigated microplastics freshwater fish diets. In this study, water samples three trophic levels of a food web were for microplastic presence: amphipods (Gammarus lacustris), Yellowstone cutthroat trout (Oncorhynchus clarkii bouvieri), lake (Salvelinus namaycush). other anthrop...