A beautiful cut of Atlantic salmon, a popular species among seafood lovers that is in severe decline.
CREDIT:
Flickr User Kent Wang (Creative Commons)
Publish by: Emily Fisher - Dec 20, 2010
Salmon are one of the most widely loved varieties of seafood in the world. A ubiquitous alternative to meat and poultry, salmon wear a halo of healthfulness, as they are rich in protein and omega-3 fatty acids . But many wild salmon stocks are dwindling, which means that unless otherwise specified, the salmon you’re most likely to find in restaurants and stores is from a farm. Wild Atlantic salmon once ranged from Portugal to Newfoundland and in every major river north of the Hudson, but they have disappeared from many waterways and are in danger of going extinct within our lifetime...
Tags: Aquaculture, Fisheries, Human impacts, Salmon
With more desirable species being fished out and jellyfish blooming, will jellyfish sandwiches soon be on the menu?
CREDIT:
David Beck / Jennifer Jacquet
Publish by: Nancy Knowlton - Nov 29, 2010
All over the world, people have been witnessing gigantic blooms of tens of thousands of jellyfish where once there were only a few. Fishers find them clogging their nets and costing them dearly. In Japan, giant jellyfish capable of reaching six feet across even capsized a boat that tried to bring them aboard. Where are these stinging menaces coming from and why are they everywhere? Jellyfish explosions are often triggered by overfishing of small fish, like sardines and anchovies, which compete with jellyfish for food. Jellyfish are also more tolerant of low oxygen conditions than fishes, and...
Tags: Citizens of the Sea, Fisheries, Jellyfish
A small horseshoe crab rests on seaweed in Stage Harbor, Massachusetts.
CREDIT:
© Luke Robinson (Creative Commons via Flickr)
Publish by: Christine Hoekenga - Nov 22, 2010
Fever. Aching muscles. Coughing. Sniffling. It’s flu season . Have you had your shot? If so, thank a horseshoe crab. In fact, if you’ve been put on an IV, had a medical device implanted, or received nearly any injectable medication or vaccine in the past few decades, you likely owe the humble horseshoe crab a debt of gratitude. These bizarre creatures —with their helmet-shaped shells, blue-colored blood, seven pairs of legs, and 10 eyes—hold an important medical tool in their bloodstreams. In the 1950s, researchers noticed that the blood of the western Atlantic horseshoe crab species (called...
A neighborhood seafood market in the Testaccio area of Rome, Italy.
CREDIT:
Oceansart.us/Marine Photobank
Publish by: Carole Baldwin - Nov 18, 2010
Sunday, November 21 marks World Fisheries Day , an annual occasion observed in many fishing communities around the world. It’s a great opportunity—even for those of us who do not fish for a living—to pause and reflect on the importance of maintaining healthy fisheries. As a scientist, my research on tropical marine fishes has taken me around the world, including locations where I have seen firsthand the impacts that humans are having on marine resources. In 2001, for example, I was part of a Smithsonian expedition to El Salvador studying the coastal fish fauna. We had a chance to work one day...
Tags: Bycatch, Fisheries, Smithsonian scientists
A scalloped hammerhead shark at Isla del Coco, Costa Rica.
CREDIT:
© Terry Goss 2008/Marine Photobank
Publish by: Nancy Knowlton - Nov 2, 2010
Animals, on land and in the ocean, live in a 3-D world, and they depend on their sense organs and brains to build the mental constructs that allow them to orient and navigate, which is crucial for hunting and fleeing. The process is far from simple. Humans, for example, use many visual clues to judge relative distance. Objects get smaller and blurrier with distance and parallel lines appear to converge, principles that painters mastered in the 13th and 14th centuries in their quest to turn a 2-D canvas into a 3-D experience. More recently, paired cameras have made 3-D photographs and films a...
Tags: Citizens of the Sea, Feeding, Senses
A coral has just spawned. Each of the hundreds of polyps releases a small pink bundle of sperm and eggs.
CREDIT:
Raphael Williams
Publish by: Nancy Knowlton - Oct 20, 2010
Welcome to Citizens of the Sea , a new blog series where ocean life comes to life. Our book by the same name came out in September, but no sooner had it gone off to the printer than new ocean stories started streaming in. So every other week, we’ll use this series to explore some interesting aspect of marine life forms and their weird and wonderful ways of getting by. We’d like to start with a personal story about the reefs of Panama near the Smithsonian Tropical Research Institute where we recently spent 10 days studying coral spawning. Corals reproduce both sexually and asexually. A colony...
Tags: Caribbean, Coral bleaching, Corals, Nancy Knowlton, Reproduction
A variety of organisms make their home on this tropical coral reef in Indonesia.
CREDIT:
© Chris Newbert/Minden Pictures
Publish by: Rick MacPherson - Oct 13, 2010
For those of you who have had the opportunity to visit a coral reef , you know that it’s an experience you are unlikely to forget. Coral reefs are among the world’s most magnificent ecosystems. Their beauty alone makes them incalculably valuable, but beyond aesthetics, their importance to both marine life and humans is immense. Though they cover less than one percent of the ocean floor, coral reefs support an estimated 25 percent of all marine life. They generate billions of dollars and millions of jobs in more than 100 countries around the world, and provide an important local food source...
Tags: Corals, Human impacts, Protected areas, Scuba diving, Tourism
Robotic gliders allow researchers to collect data in severe weather conditions without risking lives. In 2009 Hurricane Bill passed to the north during the Scarlet Knight’s mission, producing large waves that battered the glider and challenging scientists trying to reach it for an inspection. Following the path of Christopher Columbus’s Pinta, the Scarlet Knight crossed the Atlantic Ocean and landed in Baiona, Spain, on Dec. 9, 2009, becoming the first unmanned robotic glider to cross an ocean basin.
CREDIT:
NOAA
Publish by: Isaac Ginis - Oct 6, 2010
I became interested in weather phenomena when I took physics in high school. At the time, I just wanted to understand how various things in nature worked. Unfortunately, most information about weather and hurricanes, whether in textbooks or on television, is merely descriptive: this is the sequence of events that we observe, and they lead to a hurricane. There is usually very little explanation of why it’s happening or the physics behind it. But, if we want to predict what a hurricane is going to do tomorrow or in the next few days, we have to understand the physical processes—from the...
The "Lower Invertebrates" exhibit in Smithsonian Institution Building in 1901 included models of a giant squid and an octopus.
CREDIT:
Smithsonian Archives
Publish by: Christine Hoekenga - Sep 24, 2010
This year marks 100 years since the National Museum of Natural History opened its doors, but the Smithsonian’s work in marine science dates back more than 160 years. In fact, our marine collection —the largest in the world at more than 80 million specimens—has its roots in The U.S. Exploring Expedition (or “Ex Ex,” for short). From 1838 to 1842, six vessels and more than 340 men, including a team of nine scientists and artists, sailed the seas exploring, establishing a diplomatic presence, demonstrating a new nation’s Naval prowess, and documenting cultural and scientific diversity. The Ex Ex...
Plastic pollution in the ocean is a serious problem. Our flotsam can choke, entangle, or kill marine life and is dangerous to humans as well.
CREDIT:
Onno Groß, DEEPWAVE
Publish by: Onno Groß - Sep 23, 2010
Once upon a time, the ocean was considered the last place where we could still find an undisturbed environment. This was before the plague of man-made plastic trash flooded the seas. During my travels, I have realized that everything has changed. There is scarcely a place on Earth where plastic litter is not present. Standing on the decks of our research ship, miles away from any large urban areas, we have retrieved plastic from the deepest parts of the sea. The increasing rate of plastic pollution is alarming. The production of plastic doubles every decade, and ever-increasing amounts of...
