Tag Archives: marine-science

Study: Microplastic fiber pollution harms lobster larvae

A study published in the Marine Pollution Bulletin reports that the fibers affect the animals’ feeding and respiration, and they could even prevent some larvae from reaching adulthood. “Lobsters play a fundamental role in the Gulf of Maine ecosystem as well as the state’s economy, and it is important that we understand how pollutants impact their development.” Young lobsters grow to adulthood through four distinct developmental stages, and the researchers found that the physiology of each stage determined how the animals interacted with plastic fibers. The youngest lobsters didn’t consume them—but they were plagued by fibers accumulating under the shells that protect their gills. >click to read< 16:04

CO2 Not A Threat To Oceans

For the past three decades, the public has been taught by the news media and the folks who make a living composing mathematical equations they claim to simulate how our planet’s climate operates, that our oceans are in jeopardy.,,, Even if atmospheric CO2 concentrations triple from today’s four percent of one percent, which would take about 600 years, today’s surface pH of 8.2 would plateau at 7.8, still well above neutral 7. Now comes along biologist Jim Steele of the CO2 Coalition and former Research Director of San Francisco State’s Sierra Nevada’s Field Campus to drop a blockbuster of truly new knowledge. By Dr. Jay Lehr   >click to read< 10:03

“Oh, here we go, baby!” Watch: Researchers stumble across a whale carcass teeming with marine scavengers

When whales die in the open ocean they sometimes sink to the sandy floor where scavenging fish and other marine creatures tuck into the colossal feast. Octopuses, deep-sea fish, crabs and bone-eating worms all turn up for dinner. But there’s one species in particular that gets über-excited when a whale carcass hits the ocean floor: marine researchers. A team from Monterey Bay National Marine Sanctuary aboard research vessel Nautilus were exploring the ocean depths off the coast of central California recently when they happened upon a baleen whale carcass. >click to read/watch< 15:12

Annual Irish Groundfish Survey Commences End Of This Month

The annual Irish Groundfish Survey (IGFS 2019) will take place off the North, West and South Coasts for six weeks from 31 October. Carried out by the Marine Institute, the IGFS is a demersal trawl survey consisting of around 170 fishing hauls, each of of 30 minutes’ duration, in ICES areas VIa, VIIb, VIIg and VIIj. As part of the requirements for the 2019 survey, fishing will take place within a 2-nautical-mile radius of indicated positions.  >click to read< 09:50

Researchers aim to find where Pacific salmon spend their winters

An international team of scientists is heading to the Gulf of Alaska for a ground-breaking research survey to uncover the secret lives of Pacific salmon in the winter. Discoveries coming out of a 25-day research cruise using a trawler in the North Pacific are expected to help countries do a better job of managing, conserving and restoring salmon stocks, including improving forecasting of returns. “I say it’s the great black box because we basically lose track of the salmon after they leave our coastal waters,” said Brian Riddell, president and chief executive of the Vancouver-based Pacific Salmon Foundation, a key backer of the endeavour. The team is made up of six Canadian scientists, eight from Russia, three from the U.S., and one each from Japan and South Korea.>click to read<13:41

Reflections on the success of traditional fisheries management – Hilborn and Ovando

The argument persists that the continued overexploitation by many fisheries around the world is evidence that current approaches to fisheries management are failing, and that more precautionary management approaches are needed. We review the available estimates of the status of fish stocks from three sources: Read more here  11:31

Bucking conventional wisdom, researchers find black sea bass tougher than expected – discard mortality rates

The researchers had put the fish in the experimental group into one of four categories: those without visible injury; those with visible barotrauma; those with hook trauma (meaning the hook had caused significant internal injury); and “floaters” – those that couldn’t swim down into the water at all. To their surprise, the researchers found that approximately 90 percent of the fish,, Read more here phys.org  09:57

10 times more fish in the sea? Context matters.

Earlier this year, a research team from Spain released a surprising new estimate of mesopelagic fish biomass that is 10 times greater than previous estimates. This new study raises the total estimated biomass of mesopelagic fish from 1 billion  tons to 10 billion tons, accounting for 95% of all fish biomass. Read more here southernfriedscience  18:35

Citizen science study to map the oceans’ plankton

“The reason the project came about was because, in 2010, some Canadian scientists wrote a paper that suggested that the phytoplankton in the world’s oceans had declined by 40% since the 1950’s,” explained project leader Richard Kirby, a research fellow at Plymouth University’s Marine Institute. Read more here bbc.com  15:46

Over demanding market affects fisheries more than climate change

Summary: Fisheries that rely on short life species, such as shrimp or sardine, have been more affected by climate change, because this phenomenon affects chlorophyll production, which is vital for phytoplankton, the main food for both species. Read more here  sciencedaily  16:37

 

Can technological advances help acidifying seas?

Many scientists are increasingly acknowledging that we can no longer afford to dismiss some gee-whiz technological fixes outright. We need to understand what, if any of it, could help. In 2012, a controversial California entrepreneur motored off the coast of British Columbia and dumped 100 metric tons of iron dust into the Pacific Ocean, hoping to spark a 4,000-square-mile plankton bloom. Read [email protected] 11:22

Nine steps to save waterways and fisheries identified by researchers

The key to clean water and sustainable fisheries is to follow nine guiding principles of water management, says a team of Canadian biologists. Read [email protected]  10:40

Cod’s mysterious defence strategies

g0002580000000000000bea0810c3a6cac2be28188b42d824fdbd10e7d9Low prices for wild-caught cod have kept cod farming profits minimal up to now. The additional challenges of expensive feeds, destructive diseases and high mortality have also proven difficult to solve. On the disease front, Norwegian researchers showed in 2011 that the cod immune system is very unlike that of other production fish such as salmon. Read [email protected]  10:06

Computer Model Predictions: Major Reductions in Seafloor Marine Life from Climate Change by 2100

An international team of scientists predict seafloor dwelling marine life will decline by up to 38 per cent in the North Atlantic and over five per cent globally over the next century. These changes will be driven by a reduction in the plants and animals that live at the surface of the oceans that feed deep-sea communities. As a result, ecosystem services such as fishing will be threatened. Read [email protected]  11:13

Now We’re Talkin’! – Assessing the potential of calcium-based artificial ocean alkalinization to mitigate rising atmospheric CO2 and ocean acidification

Enhancement of ocean alkalinity using Calcium-compounds, e.g. lime has been proposed to mitigate further increase of atmospheric CO2 and ocean acidification due to anthropogenic CO2 emissions. [email protected] 10:13

As Long Island Sound’s temperature increases, Fish populations heat up in Long Island Sound

The 42-foot-wide net was set in the rolling waters of Long Island Sound, about 150 feet behind the research vessel John Dempsey. “All right, we’re fishing,” announced Jacqueline Benway, a state fisheries biologist with Connecticut, as she shut off the hydraulics controlling the large funnel-shaped net. [email protected] 10:13

Can the ‘butterfly effect’ inform fisheries management?

Dr. Les Kaufman, a marine ecologist at Boston University, has been deploying his considerable talents in the service of fisheries science and management for over three decades, but it is in the last year that he has developed an approach that very well may elevate our ability to manage fisheries onto a new level. [email protected] 17:31

Scientist look for new marine species for commercial use

In northwest Mexico, the biggest part of the fishery production is based in few species such as sardine, squid, tuna and shrimp. However, the Center of Biological Research of the Northwest (CIBNOR) has identified new marine species capable of increasing the volume of this production. [email protected] 15:14

Study links warmer water temperatures to greater levels of mercury in fish

Killifish are not usually big eaters. But in warmer waters, at temperatures projected for the future by climate scientists, their metabolism — and their appetites — go up, which is not a good thing if there are toxins in their food. [email protected]   Research Article: Experimental and Natural Warming Elevates Mercury Concentrations in Estuarine Fish @plosone.org 10:13

Glider Palooza 2013 – Diving ocean gliders capture valuable data

“That boat is right where we want to be,” Rock said, glancing down at his GPS screen and pointing to where a big fish dragger, with long mantislike stabilizer arms spread wide, towed a net right through the area where the torpedo-shaped glider should be waiting for them. [email protected] 10:49

Climate Change Will Upset Vital Ocean Chemical Cycles, Research Shows

New research from the University of East Anglia shows that rising ocean temperatures will upset natural cycles of carbon dioxide, nitrogen and phosphorus. Plankton plays an important role in the ocean’s carbon cycle by removing half of all CO2 from the atmosphere during photosynthesis and storing it deep under the sea — isolated from the atmosphere for centuries. [email protected] 09:34

Not Your Average Drifters – Plankton, Part I – by Casey Diederich

“Plankton” is a term that comes from the Greek meaning “wanderer” and was coined to describe any organism that doesn’t have the ability to swim against the water current. So, technically, even some very large animals like jellies are members of the plankton, but most planktonic organisms are very small, and as the title suggests, the best things come in small packages. [email protected]  16:26

New Ocean Forecast Could Help Predict Fish Habitat Six Months in Advance

Being able to predict future phytoplankton blooms, ocean temperatures and low-oxygen events could help fisheries managers,” said Samantha Siedlecki, a research scientist at the UW-based Joint Institute for the Study of the Atmosphere and Ocean. [email protected]  10:37

Scientists develop new method of estimating fish movements underwater

The radio signals that are the backbone of traditional GPS cannot pass through seawater.  But sound travels remarkably well, so scientists often use acoustic telemetry to estimate an individual fish’s location. That means attaching an acoustic transmitter to a fish and then using a network of stationary underwater listening stations to monitor for the short clicking sounds that these tags emit. When a fish swims near to a receiver, its click is heard, and its individual code number is recorded.  [email protected] 07:22

Marine Life Reacts Faster to Warming Than Land Species

Species that depend on the sea are reacting more quickly to global warming than land-based life, according to a study in scientific journal Nature Climate  Change, with implications for fisheries and food supplies. @bloomberg

Tiny ear bones of fish tell a big story about the environment.

Fish ear bones, also known as otoliths, are like tree rings for the ocean. A layer of calcium carbonate laid down each year offers a snapshot of both the fish’s yearly growth and its surrounding ocean conditions. [email protected]

First global atlas of marine plankton reveals remarkable underwater world

Now researchers from the University of East Anglia have helped to compile the first ever global atlas of marine plankton – published today in a special issue of the journal Earth System Science Data. [email protected]

Should scientists avoid publishing shark migration data because it helps fishermen? (The environmental activists are a bit paranoid, me thinks.)

Spoiler: No. In recent weeks, some conservation activists have been promoting an idea that I would like to respond to as a member of the scientific community. They claim that scientists shouldn’t publish data about shark migrations, movement, or population dynamics because such data helps fishermen to find areas where there are lots of sharks and kill them. This  misguided anti-science paranoia demonstrates a fundamental lack of understanding about how conservation policy works. [email protected]

The most abhorrent occupation in the world? Dr Magnus Johnson,

Imagine you have a business.

You’re not breaking any laws and its something your family have been doing for hundreds of years.  Your whole community has been doing it and whole cultures, traditions, music, stories and clothes have evolve around it.  Industries have thrived on your products.  Your product is gluten free, contains no additives, has a low carbon cost, doesn’t involve ploughing and transforming the land and gives us beautiful food that kings and commoners alike adore. continued

In depth article: Climate Change Impacts Ripple Through Fishing Industry While Ocean Science Lags Behind

Huffington Post – With a limberness that defies his 69 years, Frank Mirarchi heaves himself over the edge of a concrete wharf and steps out onto a slack, downward sloping dock line bouncing 20 feet above the lapping waters near Scituate, Mass. continued