The decline of other fish species in the region has deprived the lobster of its natural food source of scavenged fish.
The bait in lobster traps provides abundant food for young lobsters, which are still small enough to swith out of the traps, leading to much higher survival rates among young lobsters than would be expected in nature.
As global warming heats the waters of the Atlantic coastline, the Maine lobster has extended its northern range to well past Nova Scotia.
The ever, increasing demand for lobsters in seafood restaurants and steakhouses across the country has driven a corresponding increase in the supply of the product.
The increased lobster harvest has resulted in many juvenile lobsters but very few breeding- age lobsters, which could result in a crash in lobster numbers in the near future.
第1题:
C
GUATEMALA CITY (Reuters) – A fish that lives in mangrove swamps(红树沼泽)across the Americas can live out of water for months at a time, similar to how animals adapted(适应)to land millions of years ago, a new study shows.
The Magrove Rivulus, a type of small killifish, lives in small pools of water in a certain type of empty nut or even old beer cans in the mangrove swamps of Belize, the United States and Brazil. When their living place dries up, they live on the land in logs(圆木),said Scott Taylor, a researcher at the Brevard Endangered Lands Program in Florida.
The fish, whose scientific name is Rivulus marmoratus, can grow as large as three inches. They group together in logs and breathe air through their skin until they can find water again.
The new scientific discovery came after a trip to Belize.
“We kicked over a log and the fish just came crowding out,” Taylor told Reuters in neighboring Guatgemala by telephone. He said he will make his study on the fish known to the public in an American magazine early next year.
In lab tests, Taylor said he found the fish can live up to 66 days out of water without eating.
Some other fish can live out of water for a short period of time. The walking catfish found in Southeast Asia can stay on land for hours at time, while lungfish found in Australia, Africa and South America can live out of water, but only in an inactive state. But no other known fish can be out of water as long as the Mangrove Rivulus and remain active, according to Patricia Wright, a biologist at Canada’s University of Guelph.
Further studies of the fish may tell how animals changed over time.
“These animals live in conditions similar to those that existed millions of years ago, when animals began making the transition(过渡)from water onto land,” Wright said.
49. The Mangrove Rivulus is a type of fish that _______.
A. likes eating nuts
B. prefers living in dry places
C. is the longest living fish on earth
D. can stay alive for two months out of water
第2题:
Large fish usually ____ small fish.
A:gather
B:take on
C:feed on
D:organize
第3题:
Millions of pounds’ ____ of fish is caught every year around the coasts of Britain.
A: worth
B: worthy
C: worthwhile
D: worthless
第4题:
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第9题:
Not all of Zorba’s competitors use kalamata olives in their oil.
Zorba’s sells more olive oil than any other company.
The most flavorful olive oil is not necessarily the best olive oil.
Because of bulk discounts, Zorba’s pays less per kilogram of kalamata olives than does its competitors.
The number of kalamata olives harvested every year is far less than the number of Spanish olives harvested every year.
第10题:
The decline of other fish species in the region has deprived the lobster of its natural food source of scavenged fish.
The bait in lobster traps provides abundant food for young lobsters, which are still small enough to swith out of the traps, leading to much higher survival rates among young lobsters than would be expected in nature.
As global warming heats the waters of the Atlantic coastline, the Maine lobster has extended its northern range to well past Nova Scotia.
The ever increasing demand for lobsters in seafood restaurants and steakhouses across the country has driven a corresponding increase in the supply of the product.
The increased lobster harvest has resulted in many iuvenile lobsters but very few breeding- age lobsters, which could result in a crash in lobster numbers in the near future.
第11题:
donation
supplement
barn
surplus
第12题:
Could a person survive an attack by a black mamba if that person received prompt medical attention?
What criteria are used to determine which animal is the “most dangerous” animal?
Could the incidence of mosquito bites be decreased through the judicious use of pesticides and insect repellent?
Does malaria kill more people per year in Africa than tuberculosis?
How does the percentage of people who survive hippopotamus attacks in Africa each year compare with the percentage of people who survive mosquito bites?
第13题:
Why is it a problem if all the smaller fish species die?
A. It's not healthy for the environment.
B. People only like to catch big fish.
C. There are too many small fish.
D. The smaller fish can get lost in the lake.
第14题:
which of the following is not one of the major exports of new zealand?
A. Wool.
B. Oil.
C. Dairy products. .
D. Fish.
第15题:
Fish is______and expensive at this time of the year in this area.
A.in large measure
B.to the minimum
C.in short supply
D.to the maximum
第16题:
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第20题:
What is the toxin used by the fish killer?
Who first discovered the organism?
How does the fish killer paralyze fish?
How many fishes can the organism kill each day?
第21题:
The increasing amount of recycled material made available each year is equal to one-tenth of the increasing amount of natural material consumed annually.
Recent studies have shown that the number of endangered animals throughout the world fluctuates sharply and is chiefly determined by changes in meteorological conditions.
The logging industry contributes huge sums of money to political campaigns instates where it has a financial interest.
The techniques that make recycling possible are constantly improved so that more is reclaimed for lower costs each year.
Political contributions by the recycling industry are now greater than those of either the logging or animal protection interests.
第22题:
Over 30 oil workers have been kidnapped this year in the Niger Delta region.
A group calling itself the Movement for the Niger Delta People has claimed responsibility for the current reported kidnapping.
The last kidnapping occurred last week when a German oil worker was taken away.
Nigeria produces the most crude oil in Africa.
第23题:
Scientists have solved the mystery about the fish killer.
More studies need to be made about the fish killer.
It is proved that the algae are reducing fish populations.
Humans have already been affected by the toxin.
第24题:
A reduction in tourism.
Increased coastal damage from hurricanes.
The extinction of the estimated 1 million species of fish.
The collapse of reef fisheries.