What is the meaning of Voltinism?

What is the meaning of Voltinism?

Definition of voltinism : the frequency or number of annual broods (as of insects) — compare polyvoltine, univoltine.

What are the types of Voltinism?

Based on voltinism B. moriis divided into three type of races: univoltines, bivoltines, and poly or multi-voltines. 1. Univoltine races produce only one generation per year.

What is a multivoltine species?

A multivoltine species is a species that has two or more broods of offspring per year. Multivoltine species are often short lived insects such as mosquitoes. They have a short adult lifespan and often die soon after mating. The larvae then develop quickly and multiple generations occur within a year.

How many generations are produced in multivoltine races?

The multivoltine species complete two or more generations per year while univoltine produce only one generation per year.

What is bivoltine silk?

Production of Bivoltine Silk:Bivoltine silk is the high quality mulberry silk produced in India as an import substitute silk. R&D has been focused to evolve productive bivoltine hybrids and package of practices for production of high quality bivoltine silk in the country.

What is Multivoltine silk?

A breed of silk moths with two life cycles in a year (two generations) as opposed to polyvoltine and multivoltine silk moths that produce many generations in a year. The quality of silk is better from the cocoons of bivoltine silkworms.

What is bivoltine race?

Mulberry silkworm races. Silkworm breed is the most influential factor in the development of sericulture.

Are butterflies Multivoltine?

Different species of butterfly exhibit varying levels of voltinism, with one, two or more generations per year.

What do you mean by Univoltine and Multivoltine?

Univoltine – (adjective) referring to organisms having one brood per year. Bivoltine – (adjective) referring to organisms having two broods per year. Multivoltine – (adjective) referring to organisms having more than two broods per year.

What is Vanya silk?

Wild silks are often referred to in India as ‘Vanya’ silks: The term ‘Vanya’ is of Sanskrit origin, meaning untamed, wild, or forest-based. Muga, Tasar, and Eri silkworms are not fully tamed and the world calls the silks they produce as ‘wild silks’. India produces four kinds of silk: mulberry, tasar, muga and eri.

What is silk mulberry?

Mulberry silk is the highest quality silk available for purchase. The unique thing about Mulberry silk is how it is produced. Mulberry silk has its history in China, where local farmers grow Mulberry trees and harvest the leaves for silkworms to feed on. The resulting cocoons are spun into raw silk fibers.

Is Tasar silk like Muga silk?

Muga: This golden yellow colour silk is prerogative of India and the pride of Assam state. It is obtained from semi-domesticated multivoltine silkworm, Antheraea assamensis. These silkworms feed on the aromatic leaves of Som and Soalu plants and are reared on trees similar to that of tasar.

Is Bombyx mori a bivoltine?

On the Breeding of Bivoltine Breeds of the Silkworm, Bombyx mori L. (Lepidoptera: Bombycidae), Tolerant to High Temperature and High Humidity Conditions of the Tropics.

What do u mean by diapause?

Definition of diapause : a period of physiologically enforced dormancy between periods of activity.

What is meant by Hypermetamorphosis?

Definition of hypermetamorphosis : a method of development in an insect (as the blister beetle) in which the larva passes through numerous instars each markedly diverse from the rest in structure.

Why are silkworms killed to make silk?

Silkworms are killed to preserve material quality, thread length, and value because they chew their way out of their cocoon when they become adults in nature. Silk is widely used in the fashion industry today.

Can you make silk without killing the worm?

Ahimsa Silk, also known as peace silk, cruelty-free silk and non-violent silk, refers to any type of silk that is produced without harming or killing the silk worms. (It is also, erroneously, called vegan silk. As an animal product, however, it is not.)

What is the most expensive silk?

mulberry silk
Silk is an expensive fabric and mulberry silk is the most expensive of all its other varieties. It is made from a special type of silkworms which are fed only on mulberry silk.

Are Kosa and tussar same?

Kosa silk is mainly derived from Antheraea mylitta, an Indian silkworm. It is a special type of tussar silk that is drawn out of the cocoons grown on trees like Saja, Sal and Arjun. This preferred pure silk is mostly grown in Chattisgarh.

What does voltinism mean in biology?

voltinism(Noun) The number of broods or generations of an organism in one year. Freebase(0.00 / 0 votes)Rate this definition: Voltinism is a term used in biology to indicate the number of broods or generations of an organism in a year.

What is hybrid voltinism?

(More commonly) a population where the voltinism is mixed, because of genetic variation (e.g., in the hybrid zone between a univoltine and a bivoltine area) and/or because environmental stimuli do not induce bivoltinism in all individuals (or across all years).

What is partial voltinism?

The term partial voltinism is used to refer to two different (but not necessarily exclusive) situations: An organism wherein generations overlap in time, and so are not completely reproductively isolated.

What is the meaning of univoltine?

or (adjective) referring to organisms whose generation time is more than one year. The speckled wood butterfly is univoltine in the northern part of its range, e.g. northern Scandinavia.