Population Biology of Tropical Insects by Allen M. Young

Posted by

By Allen M. Young

In this publication i've got attempted to compile the main advancements within the research of insect populations in tropical environments. In many ways, this job has been a tricky one simply because conceptually it truly is nearly very unlikely to restrict a dialogue of insect ecology to the tropics, because the comparable suggestions, theories, and hypoth­ eses about the mechanisms in which habitats help insect populations usually follow either to temperate and to tropical areas. therefore one may perhaps argue successfully booklet akin to Peter Price's Insect Ecology represents a extra complete therapy of insect ecology, together with the tropical points. but simply because there was a massive quantity of recent research on bugs within the tropics in recent times, and since there has additionally been a robust historic curiosity in tropical bugs, judging from early museum expeditions and medically and agriculturally orientated reviews of bugs within the New and previous global tropics, i think there's a position for a booklet dealing nearly completely with tropical bugs. yet logically so, this sort of booklet via necessity comprises facts and informa­ tion from Temperate area reports, if for no different cause than simply because insights into the homes of tropical environments usually emerge from compariso'ns of species, groups, or faunas among temperate and tropical areas. An figuring out of insect populations within the tropics can't be divorced from a attention of Temperate area populations.

Show description

Read or Download Population Biology of Tropical Insects PDF

Similar biology books

Becker's World of the Cell (8th Edition)

“Because we get pleasure from interacting with biology less than- grads and imagine that they need to have biology textbooks which are sincerely written, make the subject material suitable to the reader, and aid them take pleasure in not just how a lot we already learn about biology—cell biology, in our case—but additionally how even more continues to be investi- gated and found.

Molecular Biology of Long Non-coding RNAs

​Long non-coding RNAs (lnc)RNAs have emerged as a brand new paradigm in epigenetic legislation of the genome. millions of lncRNAs were pointed out and saw in quite a lot of organisms. in contrast to mRNA, lncRNA haven't any protein-coding ability. ​So, whereas their functionality isn't really fullyyt transparent, they might function key organizers of protein complexes that permit for better order regulatory occasions.

Images of Biologically Active Structures in the Immune System: Their Use in Biology and Medicine

The range of antigen-binding buildings of antibody molecules is so enormous that each a possibility antigen will be certain via an antibody molecule in the immune process. this is often actual even for the antigen binding websites of antibodies known as idiotypes, that are certain by means of complementary bind­ ing websites of alternative antibodies referred to as anti-idiotypes.

Additional resources for Population Biology of Tropical Insects

Example text

Directional selection. When one resource base is limited and the species can potentially utilize a second kind of resource in the same environment or habitat, assuming that the species possesses the population growth potential to exploit both kinds of resources, and the population is expanding at such a rate as to have the potential to overexploit the original resource, natural selection may result in a switch to the second resource if it is more abundant than the first and if the first resource is dwindling in supply.

2. Social variation such as caste structure in some social insects. 3. Ecological variation, including shifts in habitat, flux of temporary habitats, some types of density-dependent variation, growth form variation, and host-induced variation. The above sorts of variation observed in insects and other organisms need not involve changes in the genetic makeup of populations, as they are short-term 34 CHAPTER 2 adjustments to changing environmental conditions. That is not to say, however, that such responses may not eventually result in genetic changes over long periods of time.

The field experiments of Lewontin and Birch(76) and others have shown that in both temperate and tropical environments evolutionary change does not imply the gradual perfection of a particular genotype and resulting phenotype, but rather the trends toward maintaining some level of genetic variation in the populations. Thus if some genotypes of a tropical nymphalid butterfly endow drought-resistant character states to the phenotypes, and others endow optimal traits for humid conditions and the population exists in a humid or wet forest environment, the species may have a chance to survive an unusually long dry season, particularly if the immature stages are incapable of entering into diapause.

Download PDF sample

Rated 4.63 of 5 – based on 7 votes