The importance of selective breeding in aquaculture to meet future demands for animal protein: A review
By T. Gjedrem, N. Robinson, M. Rye. 2012
649 citations recorded by the source corpus.
Abstract Aquaculture is the fastest growing food production industry, and the vast majority of aquaculture products are derived from Asia. The quantity of aquaculture products directly consumed is now greater than that resulting from conventional fisheries. The nutritional value of aquatic products compares favourably with meat from farm animals because they are rich in micronutrients and contain high levels of healthy omega-3 fatty acids. Compared with farm animals, fish are more efficient converters of energy and protein. If the aquaculture sector continues to expand at its current rate, production will reach 132 million tonnes of fish and shellfish and 43 million tonnes of seaweed in 2020. Future potential for marine aquaculture production can be estimated based on the length of coastline, and for freshwater aquaculture from available land area in different countries. The average marine production in 2005 was 103 tonnes per km coastline, varying from 0 to 1721 (China). Freshwater aquaculture production in 2005 averaged 0.17 tonnes/ha, varying from 0 to close to 6 tonnes per ha (Bangladesh), also indicating potential to dramatically increase freshwater aquaculture output. Simple estimations indicate potential for a 20-fold increase in world aquaculture production. Limits imposed by the availability of feed resources would be lessened by growing more herbivorous species and by using more of genetically improved stocks. Aquaculture generally trails far behind plant and farm animal industries in utilizing selective breeding as a tool to improve the biological efficiency of production. It is estimated that at present less than 10% of aquaculture production is based on genetically improved stocks, despite the fact that annual genetic gains reported for aquatic species are substantially higher than that of farm animals. With an average genetic gain in growth rate of 12.5% per generation, production may be dramatically increased if genetically improved animals are used. Importantly, animals selected for faster growth have also been shown to have improved feed conversion and higher survival, implying that increased use of selectively bred stocks leads to better utilization of limited resources such as feed, labour, water, and available land and sea areas.
Subfields: Aquatic Science, Genetics, Global and Planetary Change
View Paper: https://www.semanticscholar.org/paper/9ad48a7a4d8bd0dffbdaf1d367c1386aaa7d16d9
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Citations in the corpus
- Environmental impacts of genetic improvement of growth rate and feed conversion ratio in fish farming under rearing density and nitrogen output limitations (2016, background): “This proxy is in the range of 18 what has been observed or estimated in many fish species (Gjedrem et al., 2012; Gjedrem and 19 Thodesen, 2005).”
- Improvements in desirable traits of the Pacific oyster, Crassostrea gigas, as a result of five generations of selection on the West Coast, USA (2016, positive): “However, worldwide production is mainly based on un-53 improved populations or stocks (Gjedrem et al., 2012), likely limiting profitability and expanded production of this species due to the unrealized potential for genetic improvement.”
- Future directions in breeding for disease resistance in aquaculture species (2017, background): “Currently, less than 10% of aquaculture production derives from selectively bred stocks (Gjedrem et al., 2012), lagging significantly behind the terrestrial animal and plant farming industries (Gjedrem et al., 2012; Yáñez et al., 2015; Robledo et al., 2017).”
- Utilization of feed resources in the production of Atlantic salmon (Salmo salar) in Norway: An update for 2016 (2019, background): “Farming routines, technical equipment and size of farming units have also developed over time (Nilsen, 2010; Gjedrem et al., 2012).”
- Sustainable intensification of aquaculture value chains between Asia and Europe: A framework for understanding impacts and challenges (2017, background): “Selective breeding to support faster growth, increased yields and improved feed efficiency and body composition traits is most advanced for salmonids where the use of molecular marker technologies to accelerate conventional selective breeding trait-improvement rates has paid dividends (Gjedrem 2012;”
- Advances by Selective Breeding for Aquatic Species: A Review (2014, background): “This is explained by the high genetic correlation (rG = 1) between body weight and weight of fillet [47].”
- Cultivar Development of Kelps for Commercial Cultivation—Past Lessons and Future Prospects (2020, background): “The productivity of marine aquaculture has the potential to increase dramatically by the use of genetically improved populations, as exemplified by the success of salmon breeding (Gjedrem et al., 2012).”