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

Trinomial systeem of nomenclature, can you tell 10 examples of trinomial sy...

can you tell 10 examples of trinomial system of nomenclature?

Heteromorphic types - intra specific incompatibility, Heteromorphic Types -...

Heteromorphic Types - Intra specific Incompatibility Plants of the same species produce flowers that differ in morphology. This involves two (distyly) or three (tristyly) morp

Explain about true-breeding petunia plant with white petals, A true-breedin...

A true-breeding petunia plant with red petals was crossed with another true-breeding petunia plant with white petals. The plants of the F1 progeny had blue petals. When these F1 pl

Spironolactone, Aldosterone mediates myocardial remodeling and fibrosis, as...

Aldosterone mediates myocardial remodeling and fibrosis, as well as sodium retention and potassium loss at the distal tubules. The anti-aldosterone agent, spironolactone   has been

Regulation of heart, Regulation of Heart The number of electrical imp...

Regulation of Heart The number of electrical impulses initiated by the SA node is primarily the result of its innervation by fibers from both sympathetic and parasympath

What is the gross primary production of an ecosystem, Q. What is the gross ...

Q. What is the gross primary production of an ecosystem? How does GPP relate to photosynthesis? The Gross primary production of a GPP or ecosystem is the quantity of organic ma

Explain the deficiency and toxicity of vitamin a, Explain the Deficiency an...

Explain the Deficiency and Toxicity of vitamin A? Who defines VAD as tissue concentrations of vitamin A low enough to have adverse health consequences even if there is no evide

What are cytoplasmic inclusions, Cytoplasmic inclusions are cytoplasmic mol...

Cytoplasmic inclusions are cytoplasmic molecular aggregates, like as pigments, organic polymers and crystals. They are not considered cell organelles. Fat drops and glycogen gra

Feeding on food masses, Normal 0 false false false EN-I...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

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