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

Biological challenges, Biology is becoming a more quantitative science, a t...

Biology is becoming a more quantitative science, a trend that has motivated and been recently spurred by advances in computing power and data-gathering technologies. Nowhere is th

Cow-pox (vaccinia), Epidemiology: This infection, although mostly occurrin...

Epidemiology: This infection, although mostly occurring in cows, sometimes also occurs in buffaloes. Under natural conditions, the infection takes place through inoculation by the

Explain doxycycline, Explain Doxycycline Doxycycline, which frequently c...

Explain Doxycycline Doxycycline, which frequently causes gastrointestinal disturbances and can cause photosensitivity and vaginitis, offers an inexpensive once-daily alternative

What is the logic of the transfusional compatibility, What is the logic of ...

What is the logic of the transfusional compatibility concerning the ABO blood group system? The transfusional compatibility for the ABO system takes into account the antigens s

Nutition in animals, describe each and every step in nutrition in animals?

describe each and every step in nutrition in animals?

Animal genetic diversity, Only during recent years, due to commercializatio...

Only during recent years, due to commercialization of agriculture, more emphasis has been given on cash crops, which contribute very little to the animal food. As a result, the liv

How an electron acceptor becomes nadh, If NAD+ is an electron acceptor that...

If NAD+ is an electron acceptor that becomes NADH and the NADH then donates a proton to ATPase, shouldn't NADH now become NAD- since it lost it's proton but still has the electron?

Polarity - root and shoot morphogenesis, Polarity - Root and Shoot Morphoge...

Polarity - Root and Shoot Morphogenesis Polarity is defined as having a difference (morphological, physiological or both) between the two ends of an axis or cells. This is lar

Chlorofluorocarbons cause global problem, In what way do chlorofluorocarbon...

In what way do chlorofluorocarbons (CFCs) cause global problems? Chlorofluorocarbons react with and deplete the ozone in the ozone layer. This permits more ultra-violet light f

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