If the British could not find the fish, they resorted to removing the water.
ECONOMIST: Irregular warfare: After smart weapons, smart soldiers | The
The memory helps the fish find its way back to the mouth of its home river, and from there it uses chemical cues to locate its birth stream.
It involves learning where sponges grow, picking the right one, prying an intact sponge from the sea bottom, and using it on their noses to root around the right areas to find fish concealed in the sand.
Tagging is also helping David Welch, the head of the Canadian government's salmon programme, to find out where and why large numbers of the fish are vanishing.
The first Rio Earth Summit in 1992 called for nations to find ways to conserve fish stocks and prevent international conflicts over fishing on the high seas.
"Even scientists sometimes find it difficult to count the number of fish in the sea, " he said.
The theory is simple: find fish which like eating mosquito larvae and put them in ponds, rivers and wells where mosquitoes lay their eggs.
BBC: NEWS | Science/Nature | Fish eat away at malaria in India
You'll find rows of ponging durians and fragrant mangoes, the freshest fish and seafood, sauces, relishes and dressings - but the restaurant stalls at the far end of the market are genuinely sensational.
In small streams, fish find refuge in deep pools to ride out the winter.
Other factors that contribute to false results are small sample sizes, studies that show weak effects (such as a drug which works only on a small number of patients) and poorly designed studies that allow the researchers to fish among their data until they find some kind of effect, regardless of what they started out trying to prove.
As you find other fish on your journeys, you connect to people around the world who are represented by their own set of species.
FORBES: theBlu: Avatar Meets Facebook Underwater And A Strange Sensation Surfaces
They surveyed hundreds of fish and chip shops in Scotland to find out if "the delicacy" was available and if people were actually buying them.
Listen to turn-by-turn directions from the inside of your motorcycle helmet, check your trail map from the handlebars of your mountain bike, plot your chart and find fish on your next boating trip, or steer clear of lightning strikes when flying your jet.
Dive shops in Florida and the Caribbean are asking clients to record where they find these ravenous consumers of native fish, and are encouraging divers to go spear fishing for them.
BBC: Hunting possums �C and ecological balance �C in New Zealand
The harbor in New Bedford is lined with fish processing warehouses where immigrants, many of them illegal, find work.
Once they make their catch, they can immediately find out where there is strong demand and high prices, which both increases their income and lowers the average price for fish.
应用推荐