Age distribution - population parameters and regulation, Biology

Assignment Help:

Age Distribution - Population Parameters and Regulation

It is obvious that individuals in a population will be of different age groups. Relative numbers of young and old individuals in a population will significantly influence the behaviour of a population such as natality and mortality. The age structure of any population can be classified into three categories, i.e. pre-reproductive, reproductive and post-reproductive ages. Mortality usually varies with age as chances of death are more in early pre- reproductive and late post-reproductive periods. Likewise, natality is restricted to the reproductive age of individuals in a population.

The relative duration of these ages in proportion to life span is different in different organisms. For example, in modern man the three 'ages' are relatively equal in length, about one third of the life span. In comparison, the primitive man had much shorter post reproductive period. Many animals and plants have quite long pre-reproductive period. For example, a locust in its seventeen years of life has an extremely long development history with adult life lasting only less than a year.


Related Discussions:- Age distribution - population parameters and regulation

Describe the origin of muscle cramps and pains, Q. How can the knowledge ab...

Q. How can the knowledge about fermentation describe the origin of muscle cramps and pains after intense physical exertion? A typical fermentation process due to oxygen scarcit

What are the kinds of reproduction that occur in fungi, Q What are the kind...

Q What are the kinds of reproduction that occur in fungi? In fungi there is sexual and asexual reproduction. Fungi reproduce asexually by fragmentation, sporulation and gemmati

Explain treatment of latent tb infection, Treatment of latent tb infection ...

Treatment of latent tb infection The risk of developing clinical tuberculosis is greatest in patients with latent TB who are also infected with HIV or are receiving immunosuppr

Tubercular meningitis , Tubercular Meningitis (TBM) Tubercular meningi...

Tubercular Meningitis (TBM) Tubercular meningitis is a serious complication of childhood tuberculosis. It usually occurs secondarily to primary infection with tuburculosi

Why is maternal milk important for baby, Q. Why is maternal milk important ...

Q. Why is maternal milk important for the immune protection of the baby? Besides being nutritionally important like maternal milk participates in the defense of the baby agains

Explain procedure for test the presence of sugar in honey, Procedure for Te...

Procedure for Test the Presence of Sugar in Honey? 1. Mix 5 grams of honey with 5 ml ether in a mortar and pestle. 2. Decant off the ether extract into an evaporating dish.

What is the water cycle, What is the water cycle? The water cycle repre...

What is the water cycle? The water cycle represents the circulation and recycling of water in nature. Liquid water on the planet surface is heated by the sun and turns into

Explain carboxypeptidase, Carboxypeptidase The  inactive  zymogen  proc...

Carboxypeptidase The  inactive  zymogen  procarboxypeptidase  is  activated  by  trypsin .The further action on the polypeptides is carried out by carboxypeptidase which  attac

Morphology in relation to taxonomy, Q. Morphology in relation to taxonomy? ...

Q. Morphology in relation to taxonomy? Morphology is the basic tool of taxonomy, because identification is primarily based on the characters of the plant. The morphological cha

Explain about the vitamin d, Explain about the Vitamin D? Vitamin D is ...

Explain about the Vitamin D? Vitamin D is a generic term and indicates a molecule of the general structure with  rings (A, B, C, D), as you may have noticed in Figure B. The ri

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