IN BRIEF - 'Salmon signature' used to study historic Alaska fish returns
Thursday, February 14, 2013
Alaskan fishermen are no strangers to the roller coaster flux of salmon returning to home spawning grounds. Most fishermen have experienced or at least witnessed both banner years and disaster years, riding out the consequences of a life lived according to marine resources.
Modern biologists have come to recognize these strong and weak variances as cycles that span not years but decades. Now, studies coming out of the University of Washington (UW) are indicating recognizable cycles that cross hundreds of years in their rotation.
A Washington State University researcher has found that the mating habits of salmon can alter the profile of stream beds, affecting the evolution of an entire watershed. His study is one of the first to quantitatively show that salmon can influence the shape of the land.
Alex Fremier, lead author of the study and associate professor in the WSU School of the Environment, said female salmon "fluff" soil and gravel on a river bottom as they prepare their nests, or redds. The stream gravel is then more easily removed by flooding, which opens the underlying bedrock to erosion.
"The salmon aren't just moving sediment," said Fremier. "They're changing the character of the stream bed, so when there are floods, the soil and gravel is more mobile."
The study, "Sex that moves mountains: The influence of spawning fish on river profiles over geologic timescales," appears in the journal Geomorphology.
Pictures taken by a drone show cages being used for aquaculture projects floating in a bay in Lingao County, South China’s Hainan Province, Oct. 19, 2017. The county has more than 3,000 cages for deep-water aquaculture farming and produces an annual output of 24,000 tons of fish, with a market value of CNY 720 million. Lingao County has Asia’s largest deep-water cage farming base.
Queensland commercial fishermen are set to be affected by some major changes, with GPS trackers to be fitted to all boats.
As part of the Queensland Government's Sustainable Fisheries Strategy, all boats including small tender boats used to drag out nets will need to fit the tracking devices to help collect data used to assess the sustainability of fish stocks.
Gulf of Carpentaria Commercial Fishermen's Association chairman Gary Ward said having the devices on all vessels was an unnecessary expense.
"We've got no problem with the fact that it will be on the primary vessel," Mr Ward said.
A new study based on the first global survey of marine life by scuba divers has provided fresh insights into how climate change may affect marine ecosystems.
The research, published in the research journal Science Advances, predicts that as the oceans warm, fish - which appear to be superior predators in warm water - will extend their ranges away from the equator and cause a decline in the diversity of invertebrates such as crabs, lobsters, sea urchins and octopus. This is the first evidence of how ecological interactions affect marine species’ abundance at global scales.
Using data collated by the citizen science project Reef Life Survey (RLS) and including divers from New Zealand, the University of Tasmania-led research team found the total number of fishes and large invertebrates seen underwater changed little from the tropics to polar latitudes.
A group representing Mexico's leading fish canners says a proposal to create a non-fishing marine park off the Revillagigedo Islands in the Pacific could reduce catches in Mexican waters by 20 percent.
The Pacific Alliance for Sustainable Tuna says the ban could cut annual tuna catches by 10,000 metric tons and cost jobs in the industry.
The group said Wednesday the proposal was drawn up improperly by scientists who weren't qualified to gauge the economic impact.
In early October, Mexico's nature reserves commission said it would propose banning all fishing around the Revillagigedo Islands, located more than 400 miles (650 kilometers) from the coast.
The proposed 57,175-square-mile (148,087-square-kilometer) reserve would create the largest unfished marine park in North America.
Norwegian Competition Auhority has approved the transaction in which Apetit sells its seafood business in Finland, Norway and Sweden to the Norwegian based seafood group Insula AS. The parties have agreed to pursue the completion of the transaction on 31 October 2017.
Apetit Plc announced on 29 June 2017, that it had signed an agreement on selling its seafood business in Finland, Sweden and Norway to Insula AS, a group of specialized and traditional seafood companies in Norway, Sweden and Denmark producing and selling quality products to the Nordic markets.
SAN DIEGO – Thai Union, a global seafood leader with ambitious growth goals and a dedication to sustainability and innovation, has filled the new position of Sustainability Director for North America.
Roxanne Nanninga will now oversee the implementation and coordination of sustainability strategy for Chicken of the Sea and Thai Union in North America, including expansion of the company’s traceability and consumer education programs.
Nanninga comes to Thai Union from the Environmental Defense Fund (EDF) where she was a seafood markets specialist at the EDF’s Fishery Solutions Center. In this capacity, she was responsible for working with the seafood industry to improve supply chain efficiencies and promote well-managed fisheries.
One of her most notable accomplishment at EDF was development of the Pacific Groundfish Markets Development Initiative, a coalition of seafood businesses, NGOs and fish providers dedicated to durable markets for seafood products from the U.S. West Coast.
Concerned of how large-scale Mississippi River diversions will affect the coastal communities in south Louisiana, the state’s Shrimp Task Force will send a letter to local politicians and stakeholders recommending dredging instead.
The letter, which will “highlight the vast negative impact the proposed large-scale Mississippi waste-water diversions will have on coastal communities,” will be sent to Gov. John Bel Edwards, the Coastal Protection and Restoration Authority, and the Louisiana state and federal delegations.
“We need to push the issue on dredging,” Acy Cooper, president of the Louisiana Shrimp Association and chairman for the Shrimp Task Force, said at the group’s meeting today in Houma. “We want to make these dredges start making land and get it done. We want to see where we go with the dredging before we start digging holes in our levees and putting water in our estuaries.”
ISSF will hold Tuna Processor Forums in Bitung, Indonesia (23 October 2017) and Jakarta, Indonesia (24 October 2017) with support from the Walton Family Foundation. The goals of the events are to build management support for Indonesia’s tuna fisheries and equip local companies with the knowledge and opportunities to engage in tuna sustainability efforts through market influence.
“With its location between the Pacific and Indian oceans, Indonesia plays an important role in the global seafood marketplace,” said Holly Koehler, Vice President of Policy and Outreach, ISSF. ”Working collaboratively with the Government of Indonesia and local fleets and the processing industry, in partnership with other NGOs, is essential to addressing tuna sustainability challenges that will in turn have direct impacts on the work of Regional Fisheries Management Organizations (RFMOs) like the Indian Ocean Tuna Commission (IOTC) and the Western and Central Pacific Fisheries Commission (WCPFC).”
“Indonesia’s tuna fishery is one of the country’s most economically important fisheries, and its fishers land more tuna than any other fishing nation in the world,” said Heather D’Agnes, Environment Program Officer, Walton Family Foundation. “Working with seafood companies is an important step in building a sustainable future for fishermen and fish alike.”
Over 400 fisheries participate now in MSC program United Kingdom
The Marine Stewardship Council is celebrating its 20th anniversary by releasing a special edition of its Annual Report, showing that more than 400 fisheries, landing 14 per cent of global marine catch by volume, are now engaged in its program.
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