Sperm quantity/quality are significant reproductive endpoints with clear links to population level dynamics. Amphipods important model organisms in environmental toxicology. Despite this, field monitoring of male fertility invertebrates has rarely been used programs. The aim this study was compare sperm quality/quantity an amphipod collected at six UK locations differing water quality. Due low ...

Abstract Biological invasions represent one of the main contemporary pressures facing freshwater ecosystems, and a better understanding invasive species potential distributions is essential to prepare for future stressors. Crustacean invaders contribute significantly global with Ponto-Caspian region being primary donor areas Palearctic. The amphipods Dikerogammarus villosus haemobaphes , popula...

Shallow coves in Chesapeake Bay have abundant food and serve as nursery grounds for juvenile blue crabs. In this study, we examined the relationships between the diet of very small (4-40 mm CW) juvenile blue crabs and the benthic infauna in shallow, unvegetated nursery coves. We compared infauna in benthic samples with gut contents of juvenile blue crabs from six shallow coves in each of two su...

Four species of talitrid amphipods (Orchestia montagui Audouin, 1826, Orchestia stephenseni Cecchini, 1928, Orchestia xylino sp. nov. and Talitrus saltator (Montagu, 1808)) are reported from a set of fragmented pocket beaches to the east of Heraklion on the north coast of Crete. Aside from a previous record of O. stephenseni these are the first records of talitrid amphipods from the island of C...

Scientists participating in the USGS Abandoned Minelands Initiative have quantified metal concentrations and loadings from mining-related and natural background sources in the upper Animas River of southwestern Colorado, with the goal of guiding remediation decisions by federal landmanagement agencies. We have compared site-specific toxicity thresholds with frequencies of dissolved metal concen...