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

Transcription of eukaryotic protein coding genes, 1. The transcription and ...

1. The transcription and replication of DNA requires a multitude of protein complexes a. Describe the events that occur during the initiation of transcription of eukaryotic prot

Alive and something that is a living organism, Is there a difference betwee...

Is there a difference between something that is alive and something that is a living organism?

Classification of living things, Ask question what is classification of liv...

Ask question what is classification of livibg thingsMinimum 100 words accepted#

What is the importance of vitamin A, What is the importance of vitamin A ...

What is the importance of vitamin A The importance of vitamin A is undisputable. You may already be aware about the functions/role of vitamin A in our body.  Vitamin A is absol

Types of asexual reproduction, TYPES OF ASEXUAL REPRODUCTION ...

TYPES OF ASEXUAL REPRODUCTION 1 . Binar y fission - Amoeba 2. Multipl e fission -

Several types of steam sterilizer, The several types of steam sterilizers t...

The several types of steam sterilizers that are in use. 1. Lab Autoclave 2. Hospital dressing sterilizer 3. Bowl & instrument sterilizer 4. Rapid cooling sterilizer

Ist all of the parts of the generalized cell, The systems of your body are ...

The systems of your body are capable of performing specialized functions that keep you alive and enable you to reproduce. In a very general kind of way, a cell is also capable of p

Salivary analyse works on foods, Explain how salivary amylase works on food...

Explain how salivary amylase works on foods like crackers

Jaundice (icterus), Jaundice (Icterus) Jaundice is classified as pre-he...

Jaundice (Icterus) Jaundice is classified as pre-hepatic (hemolytic), hepatic and post-hepatic (obstructive) depending on origin of the problem, and is characterized by yellowi

Describe in brief about failing implant, Describe in brief about failing im...

Describe in brief about failing implant The failing implant may show evidence of pocketing, bleeding upon probing, purulence, and indicates the bone loss patterns are progressi

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