Tag Archives: Marine Animals

Why 10,000-Plus Sharks Are Hanging Out in Florida Waters

black-tip-shark
Black tip shark. Photograph: © SAF — Coastal Care

Excerpts;

Approximately 10,000 to 12,000 blacktip sharks are currently swimming off the Florida coast, but while these numbers may seem menacing, shark researchers say it’s not unusual to see these animals — visible as tiny dark spots in aerial photos and video — in the area at this time of year…

Read Full Article, LiveScience

Toxic chemicals found in beached pilot whales in Scotland

pilot-whale-beached
Beached pilot whale, Bragar, Isle of Lewis in the Outer Hebrides, Scotland. Photo source: ©© Franzi Richter

Excerpts;

Scientists have found clear evidence that whales are absorbing high levels of toxic heavy metals, with cadmium found in the brains of pilot whales which washed up in Scotland…

Read Full Article, Guardian UK

PCB chemical threat to Europe’s killer whales and dolphins, BBC News (01-14-2016)
A pollutant is present at “dangerously high levels” in Europe’s killer whales and dolphins, scientists say…

No One Knows Why Sperm Whales Are Stranding On Europe’s North Sea Beaches, Huffington Green (02-05-2016)

Slew of Beached whales On Britain’s Shores mystifies scientists, Guardian UK (10-07-2011)

Are humans to blame for mass whale strandings? by Philip Hoare, Guardian UK (05-20-2011)

Study Finds Toxic Pollutants in Fish Across the World’s Oceans, Scripps (01-30-2016)
A new global analysis of seafood found that fish populations throughout the world’s oceans are contaminated with industrial and agricultural pollutants, collectively known as persistent organic pollutants (POPs). The study also uncovered some good news¾concentrations of these pollutants have been consistently dropping over the last 30 years…

Ship noise in coastal habitats could interfere with orca’s communication, Science Daily (02-03-2013)
The study is unique because it estimates the source levels of larger populations and more classes of ships than in previous studies. Overall, container ships exhibited the highest median source levels…

Accoustic Pollution and Marine Mammals, Nature

Death by Plastic: Is Ocean Plastic Garbage Killing Whales? Independent Uk / AFP (07-10-2011)

Human-made underwater sound may have wider ecosystem effects than previously thought

lambi
Photograph: © SAF — Coastal Care

Excerpts;

Underwater sound linked to human activity could alter the behaviour of seabed creatures that play a vital role in marine ecosystems, according to new research…

Read Full Article, Science Daily

Accoustic Pollution and Marine Mammals, Nature

Ship noise in coastal habitats could interfere with orca’s communication, Science Daily (02-03-2013)

Navy study: Sonar, Blasts Might Hurt More Sea Life (05-14-2012)

A Rising Tide of Noise Is Now Easy to See, The New York Times (12-15-2012)

No One Knows Why Sperm Whales Are Stranding On Europe’s North Sea Beaches

sperm-whale
A mother sperm whale and her calf. Photo source: ©© Gabriel Barathieu / Wikimedia

Excerpts;

A sixth sperm whale has died on a British beach, the latest of nearly 30 to have become stranded in shallow waters on the coastline of Europe’s North Sea over the past month…

Read Full Article, Huffington Green

Whale washes up and dies on Norfolk beach in sixth UK stranding in weeks, Guardian UK

Slew of Beached whales On Britain’s Shores mystifies scientists, Guardian UK (10-07-2011)

Are humans to blame for mass whale strandings? by Philip Hoare, Guardian UK (05-20-2011)

Accoustic Pollution and Marine Mammals, Nature

Ship noise in coastal habitats could interfere with orca’s communication, Science Daily (02-03-2013)
The study is unique because it estimates the source levels of larger populations and more classes of ships than in previous studies. Overall, container ships exhibited the highest median source levels…

Study: Why Blue Whales Can’t Avoid Barges, Ocean Liners, Huffington Green (05-06-2015)

Ship noise in coastal habitats could interfere with orca’s communication

orca
Photo source: ©© Ross G. Strachan

Excerpts;

Because orcas, like other toothed whales, use mid-and high-frequencies to communicate and find their prey, the study measured a wide range of frequencies (10 Hz to 40,000 Hz). The results show that ships are responsible for elevated background noise levels not only at low frequencies as expected, but also at medium and higher frequencies (including at 20,000 Hz where killer whales hear best). This means that in coastal environments where marine mammals live within a few kilometers of shipping lanes, ship noise has the potential to interfere with both communication and echolocation.

The study is unique because it estimates the source levels of larger populations and more classes of ships than in previous studies. Overall, container ships exhibited the highest median source levels…

Read Full Article, Science Daily

Accoustic Pollution and Marine Mammals, Nature
In the Canary Islands, 14 beaked whales washed ashore bleeding from the ears. All eventually died. A post-mortem examination revealed that the whales showed signs of decompression sickness (what scuba divers call “the bends”). Decompression sickness can occur when a mammal swims to the ocean’s surface too quickly, and the change in pressure produces lethal nitrogen gas bubbles that clog its blood vessels. Evidence of acute decompression sickness indicates unusual behavior. Over the past 40 years, cumulative research across the globe has revealed a coincidence between naval sonar testing events and acute decompression sickness in beached marine mammals…

Whales Benefit From Action On Ocean Noise, BBC News (03-04-2013)

A Rising Tide of Noise Is Now Easy to See, The New York Times (12-15-2012)

Navy study: Sonar, Blasts Might Hurt More Sea Life (05-14-2012)

Accoustic Pollution and Naval Sonar testing, Discover Magazine (01-26-2012)

Worldwide Ship Traffic Up 300 Percent Since 1992, AGU (11-29-2014)
Maritime traffic on the world’s oceans has increased four-fold over the past 20 years, likely causing more water, air and noise pollution on the open seas, according to a new study quantifying global ship traffic…

Super-sized ships: How big can they get? Independent (10-21-2014)
Despite the physical limits and risks, ships of more than 450m are anticipated within the next five years…

A Silent Victory For Marine Mammals, On Earth Magazine (04-03-2015)
A federal judge stands up to the noisy navy for the sake of marine mammals…

Study Finds Toxic Pollutants in Fish Across the World’s Oceans

fish-coastal-care
Photograph: © SAF — Coastal Care

Excerpts;

A new global analysis of seafood found that fish populations throughout the world’s oceans are contaminated with industrial and agricultural pollutants, collectively known as persistent organic pollutants (POPs).

The study from researchers at Scripps Institution of Oceanography at UC San Diego also uncovered some good news¾concentrations of these pollutants have been consistently dropping over the last 30 years…

Read Full Article, Scripps

Florida beaches are becoming darker, and that’s good for sea turtles

turtle-tracks-florida
Sea turtle tracks at sunrise, Florida. Photo source: ©© Amy32080

Excerpts;

Newly published research confirms that the density of sea turtle nests on Florida beaches is reduced where artificial lights along the coast deter nesting females. The data also show that the network of sea turtle-friendly lighting ordinances along Florida’s coast seems to be working…

Read Full Article, Science Daily

Coastal Light Pollution Disturbs Marine Animals, New Study Shows, University of Exeter (04-29-2015)
Marine ecosystems can be changed by night-time artificial lighting according to new research. The results indicate that light pollution from coastal communities, shipping and offshore infrastructure could be changing the composition of marine invertebrate communities…

Light Pollution Deters Nesting Sea Turtles, LiveScience (06-09-2013)
Light pollution along the Mediterranean is changing the nesting habits of sea turtles in Israel, according to new research…

Endangered Green Sea Turtles Return to Florida in Record Numbers, Take Part (01-06-2016)

Successful Conservation Efforts along Florida, Pacific Coasts Recognized in Revised ESA Listing of Green Sea Turtle, NOAA (03-21-2015)

PCB chemical threat to Europe’s killer whales and dolphins

killer-whales
Orca, Vestfjorden, Norway. Photo source: ©© Cliff Hellis

Excerpts;

A pollutant is present at “dangerously high levels” in Europe’s killer whales and dolphins, scientists say…

Read Full Article, BBC News

Original Study: “PCB pollution continues to impact populations of orcas and other dolphins in European waters,” Scientific Reports (01-14-2016)

Over 80 Whales Wash Ashore on Indian Coast

pilot-whales-beached
Beached pilot whales, NZ. Photo source: ©© Angieandsteeve

Excerpts;

More than 80 whales have washed up on a beach in the southern Indian state of Tamil Nadu…

Read Full Article, Time

Mass Strandings of Pilot Whales: A Study, Science Daily (03-2013)

337 Whales Beached in Largest Stranding Ever, National Geographic (11-22-2015)
Scientists made a startling discovery on an observation flight over a remote fjord in southern Chile’s Patagonia: 337 dead whales. That is the biggest single whale stranding event known to science…

Are humans to blame for mass whale strandings? by Philip Hoare, Guardian UK (05-20-2011)

Accoustic Pollution and Marine Mammals, Nature

Whale Mass Stranding Attributed to Sonar Mapping For First Time, Wildlife Conservation Society (09-26-2013)