根据第二段This fact has been known for some time that Cichlids and stingrays can precisely detect small quantities without counting.(一段时间以来,人们就知道慈鲷和黄貂鱼可以精确地检测到少量而不需要计数。)可知,在进行研究之前人们早就知道慈鲷和黄貂鱼不需要数就能精确地识别较小...
Make sure that your discus fish is getting enough food when they are kept in the same tank with other fish, particularly the angelfish. One common factor that you should not miss out about these two types of fish is that they are both cichlids. As usual, cichlids have that reserved reputa...
However, your fish are in danger if they cannot remove the piece. It happens when the fish lacks the muscle capacity to dislodge the large chunk of food if it is firmly stuck in its throat. If the food particle is small,the fish can still absorb oxygen from the water, but it causes ...
and more cichlids than stingrays learned the task, individual performance of stingrays exceeded that of cichlids. Previous studies have provided ample evidence that fish have numerical abilities on par with those of other vertebrate and invertebrate...
A chimpanzees, dolphins and mice are smarter than fish C fish can only remember places with food B fish with good memories can live more safely in the wild D African cichlids have better memories than any other kind of fish 相关知识点: 试题...
根据文章第四段、第五段 "In the study, researchers from MacEwan University in Canada trained a kind of fish called African cichlids…They then waited for 12 days before putting them back in the tank again.…… They found that after such a long break the fish still went to the same place...
1 Past research has shown that many animals, including fish, can tell the difference between larger and smaller amounts. For example, mosquitofish prefer to join the largest possible social group and will choose a group of four over a group of three. Cichlids and stingrays can see a small ...
Tire track eel is a large fish, and while you may get little fry of no more than 4 inches, to begin with, they can easily grow up to 36 inches in the wild. Their growth in captivity is a minimum of10 inches less than their growth in the wildbecause of differences in lifestyle, ...
根据表格二"In the study,researchers from MacEwan University in Canada trained (训练) a kind of fish called African cichlids to go to a place of their fishbowl (鱼缸) to get food.","Researchers found that after such a long time,the fish still went to the same place where they first ...
Blackhead disease of cichlids (fish's head turns black due to bacteria affecting melanin production) Shrunken bellies and crooked spines in live-bearers Overweight fish that swell up (bacteria attack the liver causing unnatural fat metabolism) ...