Studies on pH stress in marine animals typically focus direct or species-specific aspects. We here test the hypothesis that a drop to = 7.6 indirectly affects intra- and interspecific interactions of benthic invertebrates by means chemical communication. recorded fitness-relevant behaviours small hermit crabs Diogenes pugilator , green shore Carcinus maenas harbour ragworms Hediste diversicolor...

Benthic macrofauna are a key component of intertidal ecosystems. Their mobility and behavior determine processes like nutrient cycling the biogeomorphic development flats. Many physical drivers benthic behavior, such as sediment grain size, have been well-studied. However, little is known about how bulk density (a measure compaction water content) affects this behavior. We investigated effect o...

Polychaetes can be successfully employed to recover essential fatty acids (EFA) from wasted uneaten aquafeeds present in aquaculture effluents. The optimization of the timeframe required produce premium ragworms ( Hediste diversicolor ) biomass rich EFA is paramount make available industry another alternative ingredient fish meal and oil. study aimed evaluate potential enrichment acid (FA) prof...

we quantified the distribution, abundance and assemblage structure of macrofauna at 22 stations in gorgan bay, seasonally in 2012-2013. also, depth, temperature, salinity, do, tom and sediment particle size were measured in each station. the highest concentration of tom was measured near the western littoral zone (10.22) while the mouth part and north-eastern area was characterized by the lowes...

Nereis falsa de Quatrefages, 1866 has been regarded as a cosmopolitan species, and several species described from different localities have junior synonyms of N. falsa. The present study is an attempt to resolve the taxonomic confusion in falsa, which seems contain distinct due previous inappropriate synonymy, widely distributed Atlantic eastern Pacific Oceans. For this purpose, authors first p...

Animals are exposed, in the natural environment, to a range of human activity related dissolved chemicals that are potentially impacting on their fitness. The animals responses to such stress determines its fitness, physiology and in case of chemical signals also its behaviour. If physical or chemical changes in the ecosystem make the detection of such a chemical impossible, then it can be reas...