In pulsed toxicant exposures, the concentration, duration, and frequency of pulses can change through time. However, the conventional median lethal concentration (LC50) method cannot adequately predict the effects of pulsed exposure, because it is associated with fixed exposure duration and constant concentration and does not include postexposure (latent) mortality. Many studies that tried to a...

Amphipods are key organisms in many freshwater systems and contribute substantially to the diversity and functioning of macroinvertebrate communities. Furthermore, they are commonly used as bioindicators and for ecotoxicological tests. For many areas, however, diversity and distribution of amphipods is inadequately known, which limits their use in ecological and ecotoxicological studies and han...

Marine derived biomass from salmon carcasses is incorporated into coastal Pacific Rim salmon river ecosystems via the organisms and structures of the freshwater foodweb. In brown water rivers of Western Kamchatka, the foodweb is dominated by ubiquitous benthic amphipods (Anisogammarus kygi) that consume salmon carcass material. We hypothesized that A. kygi are a strong interactor in the feedbac...

The acanthocephalan Echinorhynchus salmonis Müller, 1784 is a common parasite of salmonid fish, but it has rarely been reported from an intermediate host. Samples of benthic amphipods, Monoporeia affinis (Lindström), were taken from multiple, deep sites (usually below 70 m) in the Gulf of Bothnia over the course of more than a decade and examined for acanthocephalans. Overall, only 0.44% of 23 ...

A cytogenetical investigation was carried out on 8 species of amphipods from Iceland by using conventional staining, C-banding, fluorescence in situ hybridization (FISH) with rDNA and telomeric repeat probes, and flow cytometry genome size evaluation. Previously reported data on chromosome number were confirmed and the karyotype formula was determined for the first time in 3 species. The tenden...

Background Alacranes Reef was declared as a National Marine Park in 1994. Since then, many efforts have been made to inventory its biodiversity. However, groups such as amphipods have been underestimated or not considered when benthic invertebrates were inventoried. Here we present a dataset that contributes to the knowledge of benthic amphipods (Crustacea, Peracarida) from the inner lagoon hab...

Macroalgae can defend themselves against generalist and specialist herbivores via morphological and/or chemical traits. Herein we examined the defensive responses (via relative palatability) of two brown (Lessonia nigrescens, Glossophora kunthii) and two red algae (Grateloupia doryphora, Chondracanthus chamissoi) from the northern-central coast of Chile against selected generalist meso-herbivor...

Because most plant production is subject to senescence and is eventually consumed by detritivores, the factors that drive detritivore diet choice are pivotal to the flow of energy and materials through food webs. Here, we investigated the common salt marsh amphipod Gammarus palustris, which is a habitat specialist that feeds specifically on the dead leaves of its living host plant, salt marsh c...

Many trophically-transmitted parasite larvae actively manipulate their intermediate host behaviour in ways increasing its transmission probabilities to the next host in their life cycle. Only stages infective for the next host alter host behaviour in such a way. Before reaching infectivity, parasite larvae grow into several larval stages in the intermediate host, all being non-infective for the...