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Juvenile swordfish are far more vulnerable to predation, and are eaten by a wide range of predatory fish. [6] [23] Intensive fishery may be driving swordfishes and sharks into harder competition for reduced amounts of prey and therefore pitting them to fight more. [23] Human fishery is a major predator of swordfishes.
Some particular types of migration are anadromous, in which adult fish live in the sea and migrate into fresh water to spawn; and catadromous, in which adult fish live in fresh water and migrate into salt water to spawn. [2] Marine forage fish often make large migrations between their spawning, feeding and nursery grounds. Their movements are ...
Temperature is a driving factor of migration that is dependent on the time of year. Many species, especially birds, migrate to warmer locations during the winter to ...
The capelin move inshore in large schools to spawn and migrate in spring and summer to feed in plankton rich areas between Iceland, Greenland, and Jan Mayen. The migration is affected by ocean currents. Around Iceland maturing capelin make large northward feeding migrations in spring and summer.
"80% of our migratory birds here in North America are actually migrating at night," he said. "A large impact that humans actually have on birds during migration is with the light that we produce ...
However, when winter approaches, they begin their migration south and start relying more on lichen. Moreover, reindeer migrate an average of 12 to 34 miles per day and can run at speeds of up to ...
Lanternfish account for as much as 65 percent of all deep sea fish biomass and are largely responsible for the deep scattering layer of the world's oceans.. The phantom bottom is caused by the sonar misinterpreting as the ocean floor a layer of small seagoing creatures that congregate between 1,000 and 1,500 feet (300 and 460 m) below the surface.
Scottsdale, Arizona, has the lowest percentage of fatal crashes at night, at 45.1%. Boston came in third place with 52.8%, followed by Raleigh, North Carolina, at 51.1%, and Wichita, Kansas, with ...