Feed costs and time to harvest are key factors affecting the economic viability of domestic sablefish (Anoplopoma fimbria) aquaculture. Use of fast growing all-female monosex stocks dramatically reduces time to harvest, but our research to date indicates that the commercial salmon feeds typically used by industry are not optimally formulated for sablefish and there is still a high degree of potential for improved growth and feed conversion. The effects of dietary balance of protein, fat, and carbohydrate on productive performance, growth and feed conversion at any post-juvenile stage of development are unknown, and there are no commercial diets specifically formulated for sablefish aquaculture in the marketplace. Dietary nutrient imbalances combined with inappropriate feeding schedules and strategies contribute to poor nutrient utilization and are unlikely to fully support the growth potential of this species, impeding continued efforts to improve performance during grow-out to harvest. Thus, research activity focuses on establishing performance optimized diets and feeding strategies that support maximum growth, efficient feed conversion and other economically important traits such as fillet yield. Informaion on tissues collected and physiological measures (e.g., plasma steroid levels) may be available.

Feed costs and time to harvest are key factors affecting the economic viability of domestic sablefish (Anoplopoma fimbria) aquaculture. Use of fast growing all-female monosex stocks dramatically reduces time to harvest, but our research to date indicates that the commercial salmon feeds typically used by industry are not optimally formulated for sablefish and there is still a high degree of potential for improved growth and feed conversion. The effects of dietary balance of protein, fat, and carbohydrate on productive performance, growth and feed conversion at any post-juvenile stage of development are unknown, and there are no commercial diets specifically formulated for sablefish aquaculture in the marketplace. Dietary nutrient imbalances combined with inappropriate feeding schedules and strategies contribute to poor nutrient utilization and are unlikely to fully support the growth potential of this species, impeding continued efforts to improve performance during grow-out to harvest. Thus, research activity focuses on establishing performance optimized diets and feeding strategies that support maximum growth, efficient feed conversion and other economically important traits such as fillet yield. Raw data on rearing densities, tanks, water temperature, mortalities, ration and feed size may be available.

Feed costs and time to harvest are key factors affecting the economic viability of domestic sablefish (Anoplopoma fimbria) aquaculture. Use of fast growing all-female monosex stocks dramatically reduces time to harvest, but our research to date indicates that the commercial salmon feeds typically used by industry are not optimally formulated for sablefish and there is still a high degree of potential for improved growth and feed conversion. The effects of dietary balance of protein, fat, and carbohydrate on productive performance, growth and feed conversion at any post-juvenile stage of development are unknown, and there are no commercial diets specifically formulated for sablefish aquaculture in the marketplace. Dietary nutrient imbalances combined with inappropriate feeding schedules and strategies contribute to poor nutrient utilization and are unlikely to fully support the growth potential of this species, impeding continued efforts to improve performance during grow-out to harvest. Thus, research activity focuses on establishing performance optimized diets and feeding strategies that support maximum growth, efficient feed conversion and other economically important traits such as fillet yield. Information on proximate composition of fish and tissues and aqua feeds and of feed constituents and selected fish tissues.

Our experience with juvenile sablefish and long term rearing of broodstock indicate that salmon grower feeds currently used by commercial sablefish farmers for grow out are not optimally formulated to support maximum growth and efficient feed conversion. However, there are no published studies examining the effects of dietary nutrient balance on productive performance and growth at any post larval life-history stage for this species, and there are currently no commercial diets specifically formulated for sablefish in the marketplace. Because of the large impact of feed cost on the economic viability of farming sablefish, we are focusing on grow out diets intended for use during the post larval stages of development when the fish are being reared to harvest size. In this research, we use a novel statistical mixture model and response surface analysis method to determine the optimal level of dietary protein, lipid and digestible carbohydrate for testing. This approach permits simultaneous testing of diet formulations encompassing the full range of protein, lipid and digestible carbohydrate that can be produced commercially using today’s most advanced extrusion feed manufacturing technology. Fish in experiments may be PIT tagged and regularly checked for growth in length and weight.

Our experience with juvenile sablefish and long term rearing of broodstock indicate that salmon grower feeds currently used by commercial sablefish farmers for grow out are not optimally formulated to support maximum growth and efficient feed conversion. However, there are no published studies examining the effects of dietary nutrient balance on productive performance and growth at any post larval life-history stage for this species, and there are currently no commercial diets specifically formulated for sablefish in the marketplace. Because of the large impact of feed cost on the economic viability of farming sablefish, we are focusing on grow out diets intended for use during the post larval stages of development when the fish are being reared to harvest size. In this research, we use a novel statistical mixture model and response surface analysis method to determine the optimal level of dietary protein, lipid and digestible carbohydrate for testing. This approach permits simultaneous testing of diet formulations encompassing the full range of protein, lipid and digestible carbohydrate that can be produced commercially using today’s most advanced extrusion feed manufacturing technology. Raw data on rearing densities, tanks, water temperature, mortalities, ration and feed size may be available.

The concomitant replacement of fish meal and fish oil in carnivorous marine fish feeds by more sustainable terrestrial alternatives is problematic due to the limited capability of marine fish to synthesize physiological essential long chain n-3 and n-6 highly unsaturated fatty acids (HUFAs) from shorter chain fatty acid precursors present in some vegetable oils. This two-year study will employ sablefish (Anoplopoma fimbria) as a model marine finfish to systematically investigate the potential of fully replacing the added fish oil component of a typical low fishmeal feed suitable for marine aquaculture. The focus of the proposed study will be on the effects of replacing fish oil in sablefish diets with sustainable lipid sources on diet utilization and growth. In particular, the overall goals of the proposed research are the following: 1. Determine the ability of sablefish to synthesize essential HUFAs from shorter chain fatty acid precursors. 2. Explore the effects of supplementing alternative vegetable oil feeds with novel sources of essential fatty acids on growth and nutrient utilization. 3. Evaluate the feasibility of using these novel oils in practical feeds. Data obtained in these studies will further our understanding of sablefish nutrition and set the stage for future research on the effects of sustainable feed ingredients on product quality, fish health, and the reproductive potential of cultured broodstock programs. This research specifically addresses a priority of the 2008 National Marine Aquaculture Initiative, which is nutrition research involving alternative protein based diets and the influence of diet on product quality. Fish weights and lengths.

The concomitant replacement of fish meal and fish oil in carnivorous marine fish feeds by more sustainable terrestrial alternatives is problematic due to the limited capability of marine fish to synthesize physiological essential long chain n-3 and n-6 highly unsaturated fatty acids (HUFAs) from shorter chain fatty acid precursors present in some vegetable oils. This two-year study will employ sablefish (Anoplopoma fimbria) as a model marine finfish to systematically investigate the potential of fully replacing the added fish oil component of a typical low fishmeal feed suitable for marine aquaculture. The focus of the proposed study will be on the effects of replacing fish oil in sablefish diets with sustainable lipid sources on diet utilization and growth. In particular, the overall goals of the proposed research are the following: 1. Determine the ability of sablefish to synthesize essential HUFAs from shorter chain fatty acid precursors. 2. Explore the effects of supplementing alternative vegetable oil feeds with novel sources of essential fatty acids on growth and nutrient utilization. 3. Evaluate the feasibility of using these novel oils in practical feeds. Data obtained in these studies will further our understanding of sablefish nutrition and set the stage for future research on the effects of sustainable feed ingredients on product quality, fish health, and the reproductive potential of cultured broodstock programs. This research specifically addresses a priority of the 2008 National Marine Aquaculture Initiative, which is nutrition research involving alternative protein based diets and the influence of diet on product quality. Whole fish proximate composition.

The concomitant replacement of fish meal and fish oil in carnivorous marine fish feeds by more sustainable terrestrial alternatives is problematic due to the limited capability of marine fish to synthesize physiological essential long chain n-3 and n-6 highly unsaturated fatty acids (HUFAs) from shorter chain fatty acid precursors present in some vegetable oils. This two-year study will employ sablefish (Anoplopoma fimbria) as a model marine finfish to systematically investigate the potential of fully replacing the added fish oil component of a typical low fishmeal feed suitable for marine aquaculture. The focus of the proposed study will be on the effects of replacing fish oil in sablefish diets with sustainable lipid sources on diet utilization and growth. In particular, the overall goals of the proposed research are the following: 1. Determine the ability of sablefish to synthesize essential HUFAs from shorter chain fatty acid precursors. 2. Explore the effects of supplementing alternative vegetable oil feeds with novel sources of essential fatty acids on growth and nutrient utilization. 3. Evaluate the feasibility of using these novel oils in practical feeds. Data obtained in these studies will further our understanding of sablefish nutrition and set the stage for future research on the effects of sustainable feed ingredients on product quality, fish health, and the reproductive potential of cultured broodstock programs. This research specifically addresses a priority of the 2008 National Marine Aquaculture Initiative, which is nutrition research involving alternative protein based diets and the influence of diet on product quality. Fatty acid profiles.

Methods for reproductive sterilization are broadly needed in marine aquaculture due to biosafety concerns associated with escapement of farmed fish and potential genetic contamination of wild stocks. Current methods for sterilization have been primarily tested in freshwater fishes and are often ineffective, particularly in males. The proposed activity builds upon our recent success in producing the first-ever monosex female stocks of sablefish for aquaculture and seeks to develop eco-friendly, non-GMO methods for reproductive sterilization. We will use sablefish as our model marine species for sterilization and continue to collaborate with University of Maryland faculty with expertise in cutting-edge techniques for sterilization. Development of sustainable marine aquaculture is a high priority at the local (NWFSC), regional (WCR), and national levels (NOAA, DOC, Congress). Our sablefish sex control/sterilization project was also highlighted as a critical priority and outstanding area of research in the NOAA Aquaculture Science Review published 28 Feb 2019. We ultimately aim to transfer a sterilization technology to the US sablefish aquaculture industry and expand our methodology to other important species, with the goal of improving sustainability of marine aquaculture and mitigating impacts on the environment. Fish in experiments are often PIT tagged and regularly checked for growth in fork length and body weight.

Limited amounts of forage fish are available as an ingredient in feeds for the expanding aquaculture industry. Work is being conducted on a variety of underutilized materials to provide new sources of protein, oils, and minerals for fish feeds. These materials include invasive species such as carp and mussels, waste from fish and clam processing, and process waste from fish farms. Successful utilization of these materials adds needed protein and marine oils to the growing aquaculture industry, and eliminates the environmental impact of landfill or dumping at sea of these waste streams. Proximate analysis and solubility of new materials.