Recognizing the significance of the life stage of fish for nano-eco-toxicological studies, the acute toxicity of colloidal silver nanoparticles (AgNPs) was tested in three different life stages of rainbow trout. Fishes were exposed to colloidal AgNPs at nominal concentrations of 100, 32, 10, 3.2, 1, 0.32, 0.1, and 0.032 mg/L. The estimated 96 hr LC50 values were 0.25, 0.71, and 2.16 mg/L for th...

A late instar of the Tetragonoderus (Crossonychus) variegatus Dejean, 1829 larva is described for the first time, and is compared with its first instar, with the larva of another Tetragonoderus species, and with the larva of one Cyclicus species. Habitus and important structures of the larva are illustrated, as well the adult's membranous wings. Some aspects of the natural history of the larva ...

Fish monogeneans are lethal parasites in aquaculture. We provide the first experimental evidence that a notorious fish monogenean, Neobenedenia sp., can produce viable eggs in isolation for three consecutive generations. We infected individual, isolated, farmed barramundi, Lates calcarifer (Bloch) with a single oncomiracidium (larva) of the hermaphroditic monogenean Neobenedenia sp.. Isolated p...

This Adverse Outcome Pathway (AOP) describes the linkage between Deiodinase 1 inhibition and increased mortality via reduced anterior swim bladder inflation. The is a gas-filled organ found in many bony fish species typically consists of two chambers. posterior chamber inflates during early development (embryo), while late (larva). Both chambers are important for to control buoyancy has an addi...

This Adverse Outcome Pathway (AOP) describes the linkage between Thyroperoxidase inhibition and increased mortality via reduced anterior swim bladder inflation. The is a gas-filled organ found in many bony fish species typically consists of two chambers. posterior chamber inflates during early development (embryo), while late (larva). Both chambers are important for to control buoyancy has an a...

Because the availability of fish genomic data, the number of reported sequences for fish type II helical cytokines is rapidly growing, featuring different IFNs including virus-induced IFNs (IFNphi) and IFN-gamma, and IL-10 with its related cytokines (IL-20, IL-22, and IL-26). Many candidate receptors exist for these cytokines and various authors have postulated which receptor chain would be inv...

Recognizing the significance of the life stage of fish for nano-eco-toxicological studies, the acute toxicity of colloidal silver nanoparticles (AgNPs) was tested in three different life stages of rainbow trout. Fishes were exposed to colloidal AgNPs at nominal concentrations of 100, 32, 10, 3.2, 1, 0.32, 0.1, and 0.032 mg/L. The estimated 96 hr LC50 values were 0.25, 0.71, and 2.16 mg/L for th...

The freshwater pearl mussel Margaritifera margaritifera (FPM) is an endangered unionid which has a glochidium larva that attaches to the gills of Atlantic salmon Salmo salar or brown trout S. trutta, although some FPM populations have been shown exclusively attach only one these species. origin host fish may be crucial for conservation actions this species, but relative suitability local (sympa...

We report that a stage-specific developmental program, dauer larva formation, is temporally regulated by four heterochronic genes, lin-4, lin-14, lin-28, and lin-29. The effects of mutations in these four genes on dauer larva formation have revealed that they regulate two different processes of dauer larva formation: (1) a decision specifying the larval stage at which dauer larva development in...

Abstract The objective of the present study was to determine standardized total tract digestibility phosphorus (P) in black soldier fly (BSF; Hermetia illucens) larvae fed pigs. Test ingredients were fish meal (66.2% crude protein, 9.2% ether extract, and 2.63% P), 3 sources defatted BSF larva (43.1 59.2% 8.6 13.2% 0.91 1.06% a source full-fat (34.2% 36.0% 0.70% P). Six barrows with an initial ...