The effects of emamectin benzoate or ivermectin spiked sediment on juvenile American lobsters (Homarus americanus).

This study examined the effects of a range of ½-log concentrations of emamectin benzoate (commercially applied as SLICE) and ivermectin (commercially applied as IVOMEC) on juvenile American lobster, Homarus americanus. Phase I of the research assessed acute (up to 4 days) and chronic (30-day) toxicity of sediment dosed with the active ingredients emamectin benzoate (EMB) formulated as SLICE or ivermectin (IVM) formulated as IVOMEC at various nominal concentrations (EMB: 15, 48, 150, 475 and 1500 ng g wet sediment; IVM: 3, 9.5, 30, 95 and 300 ng g wet sediment) on juvenile Atlantic lobster (stages IV).

Differential modulation of resistance biomarkers in skin of juvenile and mature pink salmon, Oncorhynchus gorbuscha by the salmon louse, Lepeophtheirus salmonis.

Juvenile pink salmon larger than 0.7 g reject the sea louse, Lepeophtheirus salmonis, and are considered resistant to the infection. Robust innate defense responses in the skin contribute to the observed resistance.

Comparative defense-associated responses in salmon skin elicited by the ectoparasite Lepeophtheirus salmonis.

Susceptibility among salmonids to the ectoparasite Lepeophtheirus salmonis is related to inflammatory reactions at the site of parasite attachment. Salmon from two susceptible (Salmo salar, Oncorhynchus keta) and one resistant (Oncorhynchus gorbuscha) species were exposed to adult L. salmonis.

Preliminary studies on the isolation of bacteria from sea lice, Lepeophtheirus salmonis, infecting farmed salmon in British Columbia, Canada.

Using standard OIE bacteriological screening protocols, we sampled the external carapace and internal stomach contents of motile stages (preadult and adult) of Lepeophtheirus salmonis collected from farmed Atlantic salmon from May 2007 to April 2008 in British Columbia, Canada. Three potentially pathogenic bacteria (Tenacibaculum maritimum, Pseudomonas fluorescens, and Vibrio spp.) were isolated from external (58-100%) and internal (12.