Within the international IceAGE project (Icelandic marine Animals: Genetics and Ecology) some leucothoid amphipods (Crustacea) were collected, among them a rather small new species, belonging to the "Leucothoe spinicarpa-clade."

Two new families, the Alicellidae fam. nov. and the Valettiopsidae fam. nov., are described based on genera traditionally considered as lysianassoid amphipods. The Alicellidae fam. nov. are deep-sea scavengers often associated with thermal vents. They are distinguished from all other amphipods by a combination of characters which includes a callynophore on antenna 1; a broad, serrate left lacin...

A test deployment of a time-lapse camera lander in the deep Oslofjord (431 m) was used to obtain initial information on the response of benthic fauna to macroalgal debris. Three macroalgal species were used on the lander baited plate: Fucus serratus, Saccharina latissima and Laminaria hyperborea and observed during 41.5 hours. The deep-water shrimp Pandalus borealis were attracted to the macroa...

One new genus and four species of talitrid amphipods are described from Tonga: Platorchestia ano sp. nov.; Talorchestia spinipalma (Dana, 1852); Tongorchestia pangaimotu gen. nov., sp. nov.; T. towneri sp. nov.

In this study, nematodes were first reported in the amphipods, Ischyrocerus commensalis, collected from introduced and commercially important red king crabs, Paralithodes camtschaticus, coastal Barents Sea July 2022. Commensal amphipods registered on all crabs captured (n = 70, prevalence 100%). Further laboratory analysis revealed that 11 out of 467 amphipod individuals (prevalence 2.4%) harbo...

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...

The progenetic opecoelid trematode Coitocaecum parvum can reproduce either precociously by selfing in its second intermediate amphipod host or by mating in its normal definitive fish host. In this study, we describe and compare the infection parameters and some life history traits of both egg-producing worms and non-egg producing worms in both their second intermediate and definitive hosts. We ...

Parasitism is believed to play an important role in maintaining species diversity, for instance by facilitating coexistence between competing host species. However, the possibility that environmental factors may govern the outcome of parasite-mediated competition has rarely been considered. The closely related amphipods Corophium volutator and Corophium arenarium both serve as second intermedia...