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May 14, 2021 12:40 AM EDT (Photo : Peter Simons) (Photo : Francesco Ungaro ) In so-called mixed-stock fisheries, often, Pacific salmon fisheries capture fish from various stocks (management units), sometimes reflecting locally-adapted species. During their migration along the coast, fish are intercepted in the ocean before returning to various rivers to spawn. To investigate how to fish biodiversity inside mixed-stock fisheries affects both fishery success and conservation threats, the researchers used computer simulations of hypothetical fisheries and case studies of three actual sockeye salmon fisheries, including BC s Fraser River fishery. Our paper demonstrates how biodiversity in fisheries can support fisheries by stabilizing catches from year to year, just as a diverse investment portfolio offers more consistent returns to an investor, says lead researcher Jonathan Moore of SFU s biological sciences department. However, this comes at the expense of inc ....
(Photo : Pexels) The aquaculture industry should concentrate on cultivating simpler species with less welfare and environmental threats, such as seaweeds and bivalves like oysters, mussels, and clams. According to Franks, intelligent creatures such as octopus should not be farmed at all. Over the last few decades, the global aquaculture industry has risen to a size of $250 billion (£182 billion). Aquaculture has been criticized for detrimental effects such as deforestation, reliance on wild fish for feed, and overuse of antibiotics. It was described as a response to the exploitation of wild fish stocks. According to the report, health should be taken into account as well. Fish have long-term memory, can solve challenges, work with other animals, and sense discomfort, contrary to popular opinion. Octopuses and other cephalopods can solve puzzles, traverse mazes, and open jars. Crayfish display emotional behavior, such as fear and tension, and spiny lobsters have ad ....