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

Define the growth and development of the infant, Define the Growth and Deve...

Define the Growth and Development of the infant? Infancy is a period of rapid growth. During the first year of life, the infant grows and develops far more rapidly than at any

Adverse effects of noise pollution, 1.      Effect on general health:  ...

1.      Effect on general health:          Noise pollution increases the rate of heart beat, constriction of blood vessels and blood pressure. Noise also causes anxiety, stres

Characterstics of cleavage, CHARACTERSTICS OF CLEAVAGE - In cleavage...

CHARACTERSTICS OF CLEAVAGE - In cleavage involve the series of mitotic division, so daughter cells are genetically similar to the parental cell. The resulting cells are c

What is the meaning of obesity, What is the meaning of Obesity? Obesity...

What is the meaning of Obesity? Obesity is a condition resulting from accumulation of excess body fat. The fat deposition takes place because over a period of time, people cons

What is the primary structure of a protein, What is the primary structure o...

What is the primary structure of a protein? What is the importance of the primary structure? Ans) The primary protein structure is the linear sequence of amino acids that produc

Recycling of plasma membrane components, Recycling of Plasma Membrane Compo...

Recycling of Plasma Membrane Components During exocytosis secretory vesicles fuse with plasma membrane, adding to the membrane surface area. Yet, the surface area of plasma me

Explain an adaptation to terrestrial life, Why can the allantois be conside...

Why can the allantois be considered an adaptation to terrestrial life? The allantois is an adaptation to dry land because in embryos of oviparous terrestrial beings, like repti

Microorganisms, what are the disadvantages of protozoa?

what are the disadvantages of protozoa?

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