North American Journal of Aquaculture 

About: North American Journal of Aquaculture is an academic journal published by Wiley-Blackwell. The journal publishes majorly in the area(s): Catfish & Ictalurus. It has an ISSN identifier of 1522-2055. Over the lifetime, 1326 publications have been published receiving 17861 citations.

Salmonid Fishes Differ in Their Cortisol and Glucose Responses to Handling and Transport Stress

Abstract: Uniformly acclimated juvenile salmonid fishes subjected to 30-s handling or 2-h transport stressors showed differences in the magnitude of poststress plasma cortisol and glucose increases. Lake trout Salvelinus namaycush had the highest maximum plasma cortisol after handling (143 ng/mL), rainbow trout Oncorhynchus mykiss had the lowest levels (43 ng/mL), and brown trout Salmo trutta and brook trout Salvelinus fontinalis had intermediate levels (111 and 89 ng/mL, respectively). Lake trout had the highest peak posttransport plasma cortisol (124 ng/mL) compared with brook trout (69 ng/mL) and rainbow trout (57 ng/mL). Peak posthandling plasma glucose levels were highest in brown trout (257 mg/dL) followed by brook, rainbow, and lake trout (177, 153, and 150 mg/dL, respectively). Rainbow trout, however, had the highest peak plasma glucose concentration (223 mg/dL) after transport, and lake trout the lowest (143 mg/dL). Species considered as most stressed based on plasma cortisol elevations were not n...

Endocrine Biomarkers of Growth and Applications to Aquaculture: A Minireview of Growth Hormone, Insulin‐Like Growth Factor (IGF)‐I, and IGF‐Binding Proteins as Potential Growth Indicators in Fish

Abstract: Growth in fish and other vertebrates is under endocrine control, particularly through the growth hormone (GH)–insulin-like growth factor (IGF) axis. For this reason, it has been of interest to aquaculture researchers and the industry to establish endocrine biomarkers that can both reflect and predict growth rates in fish subject to various biotic and abiotic manipulations. Ultimately, by understanding the hormones that control growth and utilizing them as biomarkers, we hope to achieve optimal growth conditions in the aquaculture environment with less need for lengthy and costly grow-out trials. While the most appropriate endocrine biomarkers for growth can be both species and situation specific, IGF-I may be the most promising candidate for measuring instantaneous growth in fish. This is based on the direct contributions of IGF-I in regulating cell proliferation and ultimately somatic growth, along with its previously established correlations with the specific growth rate in fish under various c...

Partial Replacement of Fish Meal with Meat-and-Bone Meal, Flash-Dried Poultry By-Product Meal, and Enzyme-Digested Poultry By-Product Meal in Practical Diets for Juvenile Red Drum

Abstract: To reduce long-term dependence upon fishery resources, we evaluated selected terrestrial by-products as alternatives to fish meal for rearing juvenile (mean weight, 2.3 ± 0.1 g) red drum Sciaenops ocellatus. Over a 6-week feeding trial, 10 test diets (basal diet and 9 test diets) were formulated on an isonitrogenous (44% gross protein) basis. The primary protein sources in the basal diet were fish meal and soybean meal, which were incorporated at 30 and 24.8 g/100 g of diet, respectively. Replacement of fish meal in the test diets ranged from 16.6% to 66.7%. Low ash meat-and-bone meal (MBM), flash-dried poultry by-product meal (PBM), and enzyme-digested poultry by-product meal (EPM) were used to replace the fish meal. All four MBM diets produced significantly lower weight gain compared with fish maintained on the basal diet. Feed efficiency (FE) and protein conversion efficiency (PCE) were similar for the 16.6% MBM diet and the basal diet, but higher levels of MBM produced significantly lower FE ...

Clove Oil: An Alternative Anaesthetic for Aquaculture

Abstract: The anesthetic properties of clove oil were tested on chinook salmon Oncorhynchus tshawytscha, coho salmon O. kisutch, rainbow trout O. mykiss, and white sturgeon Acipenser transmontanus. The median lethal concentrations for a 10-min exposure were 62 mg/L for chinook salmon, 96 mg/L for coho salmon, 250 mg/L for rainbow trout, and 526 mg/L for white sturgeon. A dosage of 25 mg/L was effective in anaesthetizing all species for 120 min without mortality.