What is the Evolution of migration, Biology

Assignment Help:

Evolution of migration

Eg

  • Benefits associated with migratory flights must be greater than those associated with staying in Alaska and having to tolerate seasonal changes.
  • Selective advantage linked to evolution of migration e.g. reduction in competition; improved environmental conditions; greater reproductive success must have resulted from selection for migration.
  • Evolution of migration is linked to the improved survival of the species, despite the energy requirements of the migratory journey.
  • Consideration of such factors as range expansion due to competition and / or changing environmental conditions, increased breeding success at fringes of range (but return to seasonal feeding grounds during non-breeding season), or accidental, eg blown off course.
  • Increasing selection for those birds that possessed physiological responses to environmental cues for migration, eg birds that depart before food availability, photoperiod or temperatures decrease.
  • Similar pressures at new destination forced migratory populations / birds back to origin.
  • May have occurred when landmasses were joined / closer together, flight distances shorter, staging sites more frequent. Continental drift then selected those best adapted for longer flights.

 


Related Discussions:- What is the Evolution of migration

Explain factors that alter the speed of enzymatic recations, What are the m...

What are the main factors that alter the speed of enzymatic reactions? The major factors that change the speed of enzymatic reactions are temperature, pH and substrate concentr

What is the main cell organelle involved in cell digestion, What is the mai...

What is the main cell organelle involved in cell digestion? What are the properties of that organelle that enable it to do the task? The organelles responsible for intracellula

Diminished oxygen-carrying capacity of hemoglobin, Manifestations of anemia...

Manifestations of anemia that are directly due to the diminished oxygen-carrying capacity of hemoglobin include: Answer A. pale skin. B. bleeding. C. bone pain. D. fatigue.

In what ways does over-grazing lead to soil erosion, In what ways does over...

In what ways does over-grazing lead to soil erosion? Over-grazing leads to erosion because (i) the animals delete all the vegetation, so exposing the soil to heavy rain, (ii) t

Define about the sucrose and trehalose, Define about the Sucrose and Trehal...

Define about the Sucrose and Trehalose? Sucrose, also called saccharose, is ordinary table sugar refined from sugar cane or sugar beets. Trehalose has two a-D-glucose molecu

Importance of the brain evolved from fishes to reptiles, Q. How has the imp...

Q. How has the importance of the brain evolved from fishes to reptiles? From the least to the most complex brain structure, it is evident that the brain, from fishes to beings

Inheritence, What is inheritence and what is the relation between mendel an...

What is inheritence and what is the relation between mendel and darwin?

Explain the concept behind freezing the milk, Concept behind Freezing the m...

Concept behind Freezing the milk Freezing the milk also alters its composition and properties to a great extent. Let us learn about these changes. As the milk freezes, it becom

The best choice of a physician to determine her condition, A 37-year old wo...

A 37-year old woman is admitted to the hospital after complaining of chest pains. She admits to having had severe headaches for several days prior to seeking medical help. She is a

Subphylum crustacea, Subphylum Crustacea Crustacea are mainly aquatic...

Subphylum Crustacea Crustacea are mainly aquatic arthropods with gills for respiration. Cephalothorax has usually a carapace; appendages biramous but modified for several fun

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd