Podcast
Questions and Answers
How many kilometers do European eels travel to reach their spawning grounds in the Western Atlantic Ocean?
How many kilometers do European eels travel to reach their spawning grounds in the Western Atlantic Ocean?
- 2,000 to 3,000 km
- 1,000 to 2,000 km
- 5,000 to 6,000 km
- 3,000 to 4,000 km (correct)
At what depth do European eels spawn in the Western Atlantic Ocean?
At what depth do European eels spawn in the Western Atlantic Ocean?
- 500-600 meters
- 200-300 meters
- 100-200 meters
- 400-500 meters (correct)
What is the characteristic of the leptocephalus larva of the European eel?
What is the characteristic of the leptocephalus larva of the European eel?
- It has a hard, armored shell.
- It has a big, toothy mouth.
- It has a long, snake-like body.
- It is transparent and has large eyes. (correct)
How long does it take for the leptocephalus larva to reach its home in the river?
How long does it take for the leptocephalus larva to reach its home in the river?
What is the name of the second type of larva in the European eel's life cycle?
What is the name of the second type of larva in the European eel's life cycle?
How do the elver larvae migrate upstream to reach their home in the river?
How do the elver larvae migrate upstream to reach their home in the river?
What is believed to be the reason why some Swallows in North America changed their migration route?
What is believed to be the reason why some Swallows in North America changed their migration route?
What triggers physiological changes in birds that lead to migration?
What triggers physiological changes in birds that lead to migration?
What is the name of the hypothesis that suggests thyroid glands regulate the metabolic activities of birds, leading to migration?
What is the name of the hypothesis that suggests thyroid glands regulate the metabolic activities of birds, leading to migration?
What type of migration occurs when only a few members of a species participate in migration?
What type of migration occurs when only a few members of a species participate in migration?
What is deposited in a bird's body before migration, stimulating the bird to migrate?
What is deposited in a bird's body before migration, stimulating the bird to migrate?
How many types of bird migration are recognized?
How many types of bird migration are recognized?
What is the main reason why willow warblers migrate from Central and Southern Africa to northern Europe and Asia?
What is the main reason why willow warblers migrate from Central and Southern Africa to northern Europe and Asia?
What is an advantage of breeding in the Arctic for birds such as Bewick's swans?
What is an advantage of breeding in the Arctic for birds such as Bewick's swans?
Why do dotterels migrate to the tops of the highest Scottish mountains?
Why do dotterels migrate to the tops of the highest Scottish mountains?
What is a common reason why birds migrate to certain places year after year?
What is a common reason why birds migrate to certain places year after year?
What happens to the forests of northern Europe and Asia during the winter?
What happens to the forests of northern Europe and Asia during the winter?
What is a characteristic of the Arctic during the summer?
What is a characteristic of the Arctic during the summer?
What percentage of Indian bird species are migratory?
What percentage of Indian bird species are migratory?
Where do Koel birds emigrate to in the winter season?
Where do Koel birds emigrate to in the winter season?
What type of migration is seen in Snowy owls?
What type of migration is seen in Snowy owls?
What are birds like Sandpipers and Great snipes called?
What are birds like Sandpipers and Great snipes called?
When do Nee/kants emigrate from Himalayan range to plains of India?
When do Nee/kants emigrate from Himalayan range to plains of India?
Which birds remain present in plains of India in spring season (March/April)?
Which birds remain present in plains of India in spring season (March/April)?
What is the approximate distance traveled by the Rosy Paster from Eastern Europe to Central Asia?
What is the approximate distance traveled by the Rosy Paster from Eastern Europe to Central Asia?
At what altitude do some species of birds, such as the Siberian crane, migrate?
At what altitude do some species of birds, such as the Siberian crane, migrate?
What is a characteristic of migratory birds in terms of their time of journey?
What is a characteristic of migratory birds in terms of their time of journey?
Where do some migratory birds, such as swallows, return to every year?
Where do some migratory birds, such as swallows, return to every year?
What is a characteristic of the routes taken by migratory birds?
What is a characteristic of the routes taken by migratory birds?
What type of route do marine birds adopt?
What type of route do marine birds adopt?
