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 theory of gram staining of bacterial cultures, Explain Theory or Pr...

Explain Theory or Principle of Gram Staining of Bacterial Cultures? Foods are rich in various nutrients and can support the growth and survival of microorganisms. The microbial

Determine the food source for phosphorus, Determine the Food Source for Pho...

Determine the Food Source for Phosphorus? Phosphorus is widely distributed in food. Food phosphorus is a mixture of both organic and inorganic forms although the relative amoun

Define mechanism for provide protection against colon cancer, Define Mechan...

Define Mechanisms for Provide protection against colon cancer? Several plausable mechanisms have been formulated by which fibre may provide protection against colon cancer. The

Define protein requirements of infants, Define Protein requirements of infa...

Define Protein requirements of infants? Protein allowances of infants should meet both growth and maintenance requirements. Protein allowances are computed from the protein con

Explain the absence of passive fit of the prosthesis, Absence of Passive Fi...

Absence of Passive Fit of the Prosthesis A passive fit of the prosthesis reduces long term stresses in the superstructure, implant components and the bone adjacent to the impla

Explain about cesium-chloride gradients, Matthew Meselson and Frank Stahl g...

Matthew Meselson and Frank Stahl grew bacteria in media having either N14 or N15 for various numbers of cell divisions. DNA from the bacterial samples were isolated and spun within

What is catalyzes a substrate level phosphorylation, The enzyme in the TCA ...

The enzyme in the TCA cycle that catalyzes a substrate level phosphorylation is -citrate dehydrogenase -succinate thiokinase -isocitrate dehydrogenase

Define bioactive materials, Q. Define Bioactive materials? Bioactive ma...

Q. Define Bioactive materials? Bioactive materials: Certain glasses, ceramics, and glass-ceramics that contain oxides of silicon, sodium, calcium and phosphorus (SiO 2 , Na 2

Describe the significance of micronucleus., Describe the significance of mi...

Describe the significance of micronucleus. One of two types of dimorphic nuclei found in ciliate protozoans. The single micronucleus contains only one copy of the genome and is

Locomotion, Locomotion All animals, simple or complex, are able of per...

Locomotion All animals, simple or complex, are able of performing necessary bodily functions. One of these functions is Locomotion. Motility is one of the characteristics and

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