fish
grrlscientist | April 22, 2010tags: Glowing Life in an Underwater World, marine biology, bioluminescence, luciferase, luciferin, green fluorescent protein, eye-in-the-sea cam, ethology, evolution, Edith Widder, TEDTalks, streaming video
Some 80 to 90 percent of undersea creatures make light -- and we know very little about how or why. Bioluminescence expert Edith Widder explores this glowing, sparkling, luminous world, sharing glorious images and insight into the unseen depths (and brights) of the ocean.
TEDTalks is a daily video podcast of the best talks and performances from the TED Conference, where the world's…
cwilcox | April 21, 2010When we think about the vast diversity of life in the ocean, we automatically picture pristine coral reefs teeming with life. This is especially true for rich, tropical locations like Hawaii. What we don't think of are the deep, dark depths of the canyons that lie just beyond the shallow paradises we know and love. Scientists have known for years that these deep water locations may contain a wide variety of species, but don't talk about them as much because no one had ever explored them to see what species lived there. Now, thanks to researchers from the University of Hawaii's School of Ocean…
edyong | March 17, 2010For most men, the thought of taking on the burden of pregnancy from their partners would seem like a nightmare, but it's all part and parcel of seahorse life. After mating, female seahorses and pipefish lay their eggs into a special pouch in the male's belly and he carries the developing babies to term. They may seem like a shoe-in for a Dad-of-the-year award but this apparent display of paternal perfection has several macabre twists.
A recent study showed that pregnant pipefishes can also become vampiric cannibals, absorbing some of their brood for nutrition if their own food supplies are…
edyong | March 15, 2010Not Exactly Pocket Science is a set of shorter write-ups on new stories with links to more detailed takes by the world's best journalists and bloggers. It is meant to complement the usual fare of detailed pieces that are typical for this blog.
The rewarding side of being a psychopath
What goes on in the brains of psychopaths? They can seem outwardly normal and even charming, but tthese people typically show a lack of empathy, immoral behaviour and an impulsive streak. Joshua Buckholtz found that the last of these traits - impulsivity - may stem from a hyperactive reward system in the…
grrlscientist | March 11, 2010tags: fish farming, aquaculture, piscivory, bird sanctuary, foodie, ethical eating, permaculture, agriculture, poverty, hunger, Dan Barber, TEDTalks, streaming video
Chef Dan Barber squares off with a dilemma facing many chefs today: how to keep fish on the menu. With impeccable research and deadpan humor, he chronicles his pursuit of a sustainable fish he could love, and the foodie's honeymoon he's enjoyed since discovering an outrageously delicious fish raised using a revolutionary farming method in Spain. My one complaint about this video is that the speaker never once identifies either of…
edyong | March 9, 2010Not Exactly Pocket Science is a set of shorter write-ups on new stories with links to more detailed takes by the world's best journalists and bloggers. It is meant to complement the usual fare of detailed pieces that are typical for this blog.
Cold-proof tongue allows early chameleon to catch early insect
Chameleons are some of the most versatile of lizards. They live in baking deserts and freezing mountaintops and part of their success hinges on a weapon that works just as well in the warmth as in the cold - its tongue. Relying on stored elastic power for its ballistic strike, the…
edyong | February 25, 2010Take a look at these two fish. At first glance, they seem incredibly similar but in fact, they belong to two separate species. The one on the top is an Ambon damselfish (Pomacentrus amboinensis) and the one on the bottom is a lemon damselfish (P.moluccensis). If the distinction is hard for us to grasp, it's because we're not looking with the right eyes. The fish have a secret communication channel that's hidden to us. To hack into it, we need to look at the fish under an ultraviolet lamp.
The glare of a UV light reveals that the even yellow colours of the damselfishes' faces are actually…
gregladen | February 11, 2010This sucker was filmed in the Gulf of Mexico swimming among the oil rigs!!! It propelled itself with undulations of its dorsal fin and looks a lot like a sea serpent. In fact, it is said to be "the origin of the sea serpent myth" but I'm not quite sure what the difference is between being "the origin of the story of a 30 foot long fishy snaky thing with an undulating dorsal fin" and being a "30 foot long fishy snaky thing with an undulating dorsal fin" ...
The Gulf Serpent Project is here.
Mark Benfield is Here.
Hat Tip Grrrrrl Scientist. Oh, and while visiting Grrrl Scientist, look at…
grrlscientist | February 10, 2010tags: animals, fish, ribbonfish, oarfish, Regalecus glesne, sea serpent,marine biology, Mark Benfield, streaming video
A huge oarfish, also known as the ribbonfish, Regalecus glesne, was caught on camera in the Gulf of Mexico, giving scientists a rare glimpse of the bizarre fish in its native deep sea habitat. This is probably the largest bony fish in the seas, and it has the distinctive habit of swimming vertically (head up). Researcher Mark Benfield describes the fish, a likely inspiration for the sea serpent myth.
edyong | February 1, 2010The streams of Trinidad and Tobago are home to the most unexpected of landscape gardeners. They're guppies - tiny and beautifully coloured fish, just an inch or so long. Without tools or plans, they shape the environment around them, tweaking everything from the numbers of different species to the nutrients in the water.
The guppies are quick to adapt to different environments and particularly to which predators are around. The number and types of predators affect the guppies' lifespan, how big they get and when they become sexually mature. This, in turn, affects what they eat, and that…
edyong | January 30, 2010This article is reposted from the old Wordpress incarnation of Not Exactly Rocket Science.
Look into the oceans past the sharks, seals and fish and you will find the tiny phytoplankton. These small organisms form the basis of life in the seas but if their populations get to big, they can also choke the life from it by forming large and suffocating algal blooms.
The waters of San Francisco Bay have never had big problems with these blooms and if anything, scientists worried that the waters didn't have enough phytoplankton. All that changed in 1999, when the phytoplankton population started…
edyong | January 7, 2010
If someone at âyour workplace offends a client or a customer, they'd probably get an earful from their colleagues or boss. If someone annoys a friend of yours, you'd probably have a go at them. This capacity to punish those who behave badly, even if they haven't wronged us personally, pervades all aspects of human society. And we're not the only ones - fish punish bad behaviour too.
The bluestreak cleaner wrasse (Labroides dimidiatus) operates an underwater health spa for larger fish. It advertises its services with bright colours and distinctive dances. When customers arrive, the cleaner…
jchosy | January 3, 2010There's a really good point that has been brought up many times about scientists. We suck at sharing our results with the public. Or sometimes we share, but in a way that very few people (scientists included) could understand. One of the problems may be a lack of emphasis on the big "So what?" People are much more interested if they understand the relevance of the findings to normal life. I find it helps to relate the concepts to more familiar things in my life.
For example, fish researchers from the University of New South Wales recently published a paper on the effects of small…
grrlscientist | December 16, 2009tags: conservation, endangered species, Shark Finning, Sea Shepherd, human behavior, television, streaming video
This is a television commercial by the Sea Shepherd. It is an appeal to stop finning sharks. Shark finning refers to the cruel practice of capturing sharks and slicing off their fins. Shark fins are a Chinese delicacy -- they are the main ingredient in shark fin soup. Since shark meat isn't worth the cost of transporting the massive shark bodies to market, the finless animals are thrown back into the water, alive. Without its fins, the shark cannot swim, so it sinks beneath the…
edyong | November 27, 2009
The hammerhead shark's head is one of the strangest in the animal world. The flattened hammer, known as a 'cephalofoil', looks plain bizarre on the face of an otherwise streamlined fish, and its purpose is still the subject of debate. Is it an organic metal detector that allows the shark to sweep large swathes of ocean floor with its electricity-detecting ability? Is it a spoiler that provides the shark with extra lift as it swims? All of these theories hypotheses might be true , but Michelle McComb from Florida Atlantic University has confirmed at least one other -the hammer gives the shark…
edyong | November 24, 2009For the pipefish (and their relatives, seahorses and sea dragons), it's the males who get pregnant. After a male fertilises the female's eggs, he takes them up into a special brood pouch and shelters them until the babies hatch from his pot-bellied stomach several weeks later. He may seem like a shoe-in for the Dad-of-the-year award but this fatherly commitment has a sinister side to it. Not all of the babies he cares for make it out of his stomach alive.
Gry Sagebakken from the University of Gothenburg has proved that pregnant male pipefishes absorb some of the eggs and embryos within…
zooillogix | November 16, 2009New footage of the world's largest stingray.
Thanks to Hunter for bringing this to our attention.
edyong | October 24, 2009
Nature is rife with charlatans. Hundreds of animals have evolved to look like other species in order to fool predators into thinking they're more of a threat, or to sneak up on unsuspecting prey. In the Indo-Pacific lives a fish that does both and has the rare ability to switch between different disguises - the bluestriped fangblenny.
Common though it is, mimicry is usually restrictive and most fakers are stuck with one disguise. Until a few years ago, the only known animal that could switch between different acts was the amazing mimic octopus, which contorts its flexible body to look…
edyong | August 28, 2009This article is reposted from the old Wordpress incarnation of Not Exactly Rocket Science.
Getting excited when fish produce sperm would usually get you strange looks. But for Tomoyuki Okutsu and colleagues at the Tokyo University of Marine Science and Technology, it's all part of a day's work. They are trying to use one species of fish as surrogate parents for another, a technique that could help to preserve species that are headed for extinction.
Okutsu works on salmonids, a group of fish that includes salmon and trout. Many members of this tasty clan have suffered greatly from over-…