The Ampeliscidae Kröyer, 1842 is amongst the most diverse amphipod families; it comprises four genera, Ampelisca being richest with more than 200 species. genus presents high morphological homogeneity and identification of species by ecologists remains difficult. are also characterized a degree sympatry, rare situation in amphipods, this study we report up to nine coexisting at same site. Recen...

Predators must consume enough prey to support costly events, such as reproduction. Meeting high energetic requirements is particularly challenging for migrating baleen whales their feeding seasons are typically restricted a limited temporal window and marine notoriously patchy. We assessed the value of six most common nearshore zooplankton species collected within Oregon, United States range Pa...

Individual chemical logistic regression models were developed for 37 chemicals of potential concern in contaminated sediments to predict the probability of toxicity, based on the standard 10-d survival test for the marine amphipods Ampelisca abdita and Rhepoxynius abronius. These models were derived from a large database of matching sediment chemistry and toxicity data, which includes contamina...

The diversity of amphipods in the continental shelf sediments of the southeast coast of India is dealt in the paper. Samples for the study were collected onboard FORV Sagar Sampada during Cruise Nos. 260, 275 and 290 conducted in December 2008, May 2010 and October 2011 respectively. Samples were collected at various depths (30 m, 50 m, 75 m, 100 m, 150 m and 200 m) along 6 transects namely Sin...

Sediment toxicity tests are valuable tools for assessing the potential effects of contaminated sediments in dredged material evaluations because they inherently address complexity (e.g., unknown contaminants, mixtures, bioavailability). Although there is a need to understand the chronic and sublethal impacts of contaminants, it is common to conduct only short-term lethality tests in evaluations...

Ammonia occurs in marine waters including effluents, receiving waters, and sediment interstitial waters. At sufficiently high concentrations, ammonia can be toxic to aquatic species. Toxicity identification evaluation (TIE) methods provide researchers with tools for identifying aquatic toxicants. For identifying ammonia toxicity, there are several possible methods including pH alteration and vo...