In the northern Gulf of Mexico, Gammarus mucronatus sensu lato is represented by at least two forms, G. mucronatus sensu stricto and a less common “macromucronate” form, which appears to be restricted to low salinity habitats. These two forms have traditionally been separated using the size or angle of projection of the dorsal mucronations (processes). However, because of variability in the dev...

Neonicotinoid insecticides like thiacloprid enter agricultural surface waters, where they may affect predator-prey-interactions, which are of central importance for ecosystems as well as the functions these systems provide. The effects of field relevant thiacloprid concentrations on the leaf consumption of Gammarus fossarum (Amphipoda) were assessed over 96 h (n = 13-17) in conjunction with its...

Submerged lobsters at 15°C were normoxaemic (CaO2 = 0-52 mmol 1~ 1 at a PaO2 of 6-53 kPa) and normocapnic (Paco2 = 0-44kPa; [HCO3~] = 9-3mequivl~ 1 and pHa = 7-78). After 3h in air the haemolymph was markedly hypoxic and hypercapnic (Paoj= 1-6 kPa; C a o ^ 0-2 mmol I"; Paco2 = 0-7kPa and pHa = 7-64). Disturbance after 3h in air caused a greater increase in PacO2 to 1-28 kPa and a fourfold incre...

Understanding and predicting the outcomes of biological invasions is challenging where multiple invader and native species interact. We hypothesize that antagonistic interactions between invaders and natives could divert their impact on subsequent invasive species, thus facilitating coexistence. From field data, we found that, when existing together in freshwater sites, the native amphipod Gamm...

Organotypic cultures of the lobster (Homarus gammarus) stomatogastric nervous system (STNS) were used to assess changes in membrane properties of neurons of the pyloric motor pattern-generating network in the long-term absence of neuromodulatory inputs to the stomatogastric ganglion (STG). Specifically, we investigated decentralization-induced changes in the distribution and density of the tran...

With a coastline of 3,260 km, a coastal area with more than 4,000 islands, and many lagoons giving protection against the waves and wind, Vietnam has great potential for seacage aquaculture. In Vietnam, seacage culture of lobsters started in the province of Khanh Hoa in 1992 and has expanded significantly around south-central Vietnam since 2000. Panulirus ornatus (ornate spiny lobster) is the m...