关于蓝鲸迁徙的英文文章
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69是什么意思的lookforEvery spring, the world's largest animal, the blue whale, migrates from its winter breeding site, the coast of Costa Rica, to the Pacific coast in the northwest of the United States. They will arch for krill, their favorite food.
新东方精英英语价格For a long time, scientists have been tracking the migration of the giants, but they cannot explain how they choo their journey. Now, an American scientific team believes that they have found the answer.
如何快速美白肌肤They examined the activity data of 60 blue whales equipped with trackers over a 10-year period and compared the data with the time of phytoplankton blooms every spring. Krill feed on phytoplankton.
Their rearch said that whales em to rely heavily on memory to make their migration decisions, which is different from most migratory land animals. Land animals will detour to adapt to the changing resources.
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Brianna Abrams, an ecologist at the National Oceanic and Atmospheric Administration, said: "blue whales u memory, or expectations developed through long-term experience, to basically match the time when krill usually thrive, rather than follow the specific circumstances of a particular year."maintained
chit"We believe that they must u memory or their past experience to hedge risks to some extent, becau there are too many variables in the ocean to accurately predict when something will happen," she said
However, Abrams also said, "as the climate warms, we e many unconventional situations. The situations are far beyond the general scope of change. This makes people worry that the range of change will be far greater than the level that blue whales or other animals can adapt to."
