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Preview: Brightsurf Science News :: Fisheries News

Fisheries Current Events and Fisheries News from Brightsurf



Fisheries Current Events and Fisheries News Events, Discoveries and Articles from Brightsurf



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California sea lion population rebounded to new highs

Wed, 17 Jan 18 00:00:30 -0800

California sea lions have fully rebounded under the protection of the Marine Mammal Protection Act, with their population on the West Coast reaching carrying capacity in 2008 before unusually warm ocean conditions reduced their numbers, according to the first comprehensive population assessment of the species.



Reimbursing ranchers for livestock killed by predators supports conservation efforts

Wed, 17 Jan 18 00:05:30 -0800

Alberta's predator compensation program offsets costs of conserving wildlife habitat on private lands in the province. 'Our research shows that private ranchlands provide important habitats for carnivorous wildlife, including wolves, cougars, bears and eagles,' explained Mark Boyce, professor in the Department of Biological Sciences and the Alberta Conservation Association Chair in Fisheries and Wildlife at the University of Alberta.



Aid for oceans and fisheries in developing world drops by 30 percent

Wed, 17 Jan 18 00:06:50 -0800

Financial aid to fisheries in developing countries has declined by 30 percent, finds a new study from UBC and Stockholm Resilience Centre researchers, published in Marine Policy. Projects focusing on climate issues in fisheries had a 77 percent decline over the five years studied.



Great scat! Bears -- not birds -- are the chief seed dispersers in Alaska

Tue, 16 Jan 18 00:16:20 -0800

In southeastern Alaska, brown and black bears are plentiful because of salmon. Their abundance also means they are the primary seed dispersers of berry-producing shrubs, according to a new study.



No-fishing zones help endangered penguins

Tue, 16 Jan 18 00:07:10 -0800

Small no-fishing zones around colonies of African penguins can help this struggling species, new research shows.



Rising temperatures turning major sea turtle population female

Thu, 11 Jan 18 00:02:10 -0800

Scientists have used a new research approach to show that warming temperatures are turning one of the world's largest sea turtle colonies almost entirely female, running the risk that the colony cannot sustain itself in coming decades, newly published research concludes.



Climate change drives collapse in marine food webs

Tue, 09 Jan 18 00:08:10 -0800

A new study has found that levels of commercial fish stocks could be harmed as rising sea temperatures affect their source of food.



'Hide or get eaten,' urine chemicals tell mud crabs

Mon, 08 Jan 18 00:09:40 -0800

Pinpointing urine compounds for the first time that make mud crabs hide for their lives, if blue crabs pee nearby, opens new doors to understanding how chemicals invisibly regulate marine wildlife.



The ocean is losing its breath -- here's the global scope

Thu, 04 Jan 18 00:05:00 -0800

In the past 50 years, the amount of water in the open ocean with zero oxygen has gone up more than fourfold. In coastal water bodies, including estuaries and seas, low-oxygen sites have increased more than tenfold since 1950. Scientists expect oxygen to continue dropping even outside these zones as Earth warms.



The ocean is losing its breath. Here's the global scope

Thu, 04 Jan 18 00:15:00 -0800

In the past 50 years, the amount of water in the open ocean with zero oxygen has risen more than fourfold. In coastal water bodies, low-oxygen sites have increased more than 10-fold since 1950. Scientists expect oxygen to continue dropping even outside these zones as Earth warms. To halt the decline, the world needs to rein in both climate change and nutrient pollution, an international team of scientists asserted in a new paper published Jan. 4 in Science.



Study finds links between deforestation and fisheries yields in the Amazon

Wed, 13 Dec 17 00:12:30 -0800

The conversion of tropical forests to crop and pastureland has long been a concern for scientists, a new study points to another unexpected consequence: changes in fish production.



Scientists call for improved technologies to save imperiled California salmon

Wed, 13 Dec 17 00:05:20 -0800

Scientists working to protect California's most endangered salmon say in a new report that key improvements in tracking Sacramento River winter-run Chinook through California's complex water delivery system would help recover the species while the water continues to flow.



Study: Suburban ponds are a septic buffet

Tue, 12 Dec 17 00:14:00 -0800

A new study shows that human waste accounts for a high percentage of nutrients consumed by some animals and plants in suburban ponds. Researchers at Yale University and Portland State University found that residential, suburban land use is altering the dynamics of the food chain, as well as where nutrients originate and how they move through pond ecosystems.



Sustainable dams -- are they possible?

Mon, 11 Dec 17 00:13:20 -0800

Humans have been altering natural waterways for centuries, but only in the last several decades have dams raised ecological concerns. N. LeRoy Poff, professor of biology at Colorado State University, studies the ecological impact to rivers from human-caused changes, such as dam building, and how these modified river systems can be managed for resilience. In a Perspective piece in the journal Science, Poff writes on the state of research in sustainable dam design.



New algorithm recognizes distinct dolphin clicks in underwater recordings

Thu, 07 Dec 17 00:06:40 -0800

Scientists have developed a new algorithm that can identify distinct dolphin click patterns among millions of clicks in recordings of wild dolphins. This approach, presented in PLOS Computational Biology by Kaitlin Frasier of Scripps Institution of Oceanography, California, and colleagues, could potentially help distinguish between dolphin species in the wild.



Hydropower dams can be managed without an all-or-nothing choice between energy and food

Thu, 07 Dec 17 00:05:50 -0800

Nearly 100 hydropower dams are planned for construction along tributaries off the Mekong River's 2,700-mile stretch. In Science Magazine, researchers present a mathematical formula to balance power generation needs with the needs of fisheries downstream.



An unexpected way to boost fishery yields using dams

Thu, 07 Dec 17 00:05:40 -0800

A new study based on the Mekong River basin, home to one of the largest freshwater fisheries in the world, reveals particular dam flow patterns that could be harnessed to boost food production -- by up to nearly four-fold compared to un-dammed ecosystems.



Invasive 'supervillain' crab can eat through its gills

Tue, 05 Dec 17 00:06:30 -0800

Invasive green shore crabs can 'eat' by absorbing nutrients across its gills -- the first demonstration of this ability in crustaceans -- scientists from the University of Alberta have found.



Aerial drone photos can yield accurate measurements of leopard seals

Wed, 29 Nov 17 00:07:30 -0800

Leopard seal measurements derived from aerial drone photographs are as accurate as those taken manually, according to a study published Nov. 29, 2017, in the open-access journal PLOS ONE by Douglas Krause from National Marine Fisheries Service, California, and colleagues.



Drone photos offer faster, cheaper data on key Antarctic species

Wed, 29 Nov 17 00:09:10 -0800

Scientists flying drones in Antarctica have demonstrated a cheaper, faster and simpler way to gauge the condition of leopard seals, which can weigh more than a half ton and reflect the health of the Antarctic ecosystem that they and a variety of commercial fisheries rely on.



Bridging the 'practice science gap' to optimize restoration projects

Mon, 27 Nov 17 00:02:10 -0800

As restoration projects throughout Massachusetts and the country focus on restoring natural ecosystems, researchers are looking for ways to better bridge the 'practice science gap' between practitioners and biodiversity research in an effort optimize these types of projects. The findings were recently published in the journal Conservation Letters.



Sharks evolved aircraft-like attributes to suit habitats

Mon, 27 Nov 17 00:01:00 -0800

Researchers report that shark species have evolved diverse physical attributes to help them thrive in different ocean ecosystems.



Ribbed mussels could help improve urban water quality

Wed, 22 Nov 17 00:02:00 -0800

Ribbed mussels can remove nitrogen and other excess nutrients from an urban estuary and could help improve water quality in other urban and coastal locations, according to a study in New York City's Bronx River. The findings, published in Environmental Science and Technology, are part of long-term efforts to improve water quality in the Bronx River Estuary.



Molting bowhead whales likely rub on rocks to facilitate sloughing off skin

Wed, 22 Nov 17 00:06:20 -0800

Bowhead whales molt and rub on large rocks -- likely facilitating exfoliation -- in coastal waters in the eastern Canadian Arctic during late summer, according to a study published Nov. 22, 2017, in the open-access journal PLOS ONE by Sarah Fortune from University of British Columbia, Canada, and colleagues.



By saving cost and energy, the lighting revolution may increase light pollution

Wed, 22 Nov 17 00:06:00 -0800

Municipalities, enterprises, and households are switching to LED lights in order to save energy. But these savings might be lost if their neighbors install new or brighter lamps. Scientists fear that this 'rebound effect' might partially or totally cancel out the savings of individual lighting retrofit projects, and make skies over cities considerably brighter.



Bowhead whales come to Cumberland Sound in Nunavut to exfoliate

Wed, 22 Nov 17 00:04:50 -0800

Aerial drone footage of bowhead whales in Canada's Arctic has revealed that the large mammals molt and use rocks to rub off dead skin.



Recovery of West Coast marine mammals boosts consumption of chinook salmon

Mon, 20 Nov 17 00:16:30 -0800

The researchers estimate that from 1975 to 2015, the yearly biomass of chinook salmon consumed by pinnipeds (sea lions and harbor seals) and killer whales increased from 6,100 to 15,200 metric tons, and from five to 31.5 million individual salmon.



Albatross populations in decline from fishing and environmental change

Mon, 20 Nov 17 00:00:20 -0800

The populations of wandering, black-browed and grey-headed albatrosses have halved over the last 35 years on sub-antarctic Bird Island according to a new study published today (Nov. 20) in the journal Proceedings of the National Academy of Sciences.



Seagrass is a key fishing ground globally
New research demonstrates that seagrass meadows are important fishing grounds all around the globe. The work highlights that there is an urgent need to start appreciating and understanding this role to be able to build more sustainable fisheries. A study led by Dr. Lina Mtwana Nordlund at Stockholm University, published in the scientific journal Fish