Posted on: 02 March, 2017
Author: Alexander P
An interested reader can turn to any of a large number of recent reviews to nd up-to-date bibliographies concerning almost all facets of this broad subject: Bronson (1968, 1971); Bruce (1966, 1967, 1... An interested reader can turn to any of a large number of recent reviews to nd up-to-date bibliographies concerning almost all facets of this broad subject: Bronson (1968, 1971); Bruce (1966, 1967, 1970); Cheal and Sprott (1971); Eisenberg and Kleiman (1973); Gleason and Reynierse (1969); Mykytowycz (1970); Ralls (1971); Schultz and Tapp (1973); Whitten (1966); and Whitten and Bronson (1970). Because of these extensive efforts, no attempt...
Posted on: 02 March, 2017
Author: Alexander P
Orientation to a host (or to aggregation pheromones) must inevitably be in opposition to dispersal behavior. The behavioral transition involved has been investigated for aphids (Kennedy and Booth 1963... Orientation to a host (or to aggregation pheromones) must inevitably be in opposition to dispersal behavior. The behavioral transition involved has been investigated for aphids (Kennedy and Booth 1963a, b) and can be explained in terms of «hitting stimulus threshold levels (Johnson 1969). At the beginning of the dispersal phase, the insect has a very low threshold for dispersal stimuli, but a very high concentration. The threshold for host-positive stimuli. In...
Posted on: 02 March, 2017
Author: Alexander P
Ability of rats of either sex to detect odors of sexually active members of the opposite sex is independent of their own gonadal state. Attraction to that odor, on the other hand, requires that female... Ability of rats of either sex to detect odors of sexually active members of the opposite sex is independent of their own gonadal state. Attraction to that odor, on the other hand, requires that females be either sexually experienced or under the inuence of estrogen. while positive responses by males require both androgen and sexual experience. Lydell and Doty (1972), also working with rats, conrmed...
Posted on: 02 March, 2017
Author: Alexander P
Let us discuss the top pheromones. The term aphrodisiac is widely used to describe this phenomenon, but care should be exercised in its use because of anthropomorphism, the tendency of anecdotal obser... Let us discuss the top pheromones. The term aphrodisiac is widely used to describe this phenomenon, but care should be exercised in its use because of anthropomorphism, the tendency of anecdotal observations to be given more credence than they deserve, and the assumption that an aphrodisiac is always successful. Male aphrodisiacs are wide- spread and most well known from the Lepidoptera, but even in this group we know...
Posted on: 02 March, 2017
Author: Alexander P
However, a very large number of reports on the occurrence and histological structure of specialized, odor-producing skin glands and on behavioral patterns concerned with the emission, deposition and o... However, a very large number of reports on the occurrence and histological structure of specialized, odor-producing skin glands and on behavioral patterns concerned with the emission, deposition and olfactory investigation of excretions suggest that pheromones not only exist in many -- if not most — primate species, but that they are also of considerable importance in regulating the daily life of the individual according to http://hartch25.weebly.com/our-marketing-blog/some-claim-pheromones-doesnt-work I shall review the evidence...
Posted on: 02 March, 2017
Author: Alexander P
Verification of the interaction of the best pheromones and stridulation has been shown for Dendroctonus pseudotsugae (Rudinsky and Michael 1972). Males stridulate at or near the entrance to a female-o... Verification of the interaction of the best pheromones and stridulation has been shown for Dendroctonus pseudotsugae (Rudinsky and Michael 1972). Males stridulate at or near the entrance to a female-occupied gallery to produce a recog- nizable ‘courtship’ sound, distinguishable in oscilloscope traces from distress sounds. An identical sound is produced on exposure to frontalin, 3-methyl-2-cyc- lohexen-1-one (MCH) and transverbenol, all female-produced pheromones (table 8.1). A D. pseudotsugae female is able...
Posted on: 02 March, 2017
Author: Alexander P
In spite of this variety, there are basic requirements common to all — a glandular source of secretion, storage area and modied scales for distribution. The eversible tubes (coremata) or the le... In spite of this variety, there are basic requirements common to all — a glandular source of secretion, storage area and modied scales for distribution. The eversible tubes (coremata) or the lever arrangement of the Noctuidae are both mechanisms for opening their brushes rapidly and thus disseminating the scent material with consid- cruble force, a factor apparently common to brush-organs wherever they are lo- cated. Observations of the...
Posted on: 02 March, 2017
Author: Brunetti Brunetti
There are a few reasons why it makes sense to have a sprinkler system installed instead of relying on manual watering of the land. The major reason why sprinkler systems are so popular these days is b... There are a few reasons why it makes sense to have a sprinkler system installed instead of relying on manual watering of the land. The major reason why sprinkler systems are so popular these days is because they are a far more efficient method of getting water to various parts of your land. Whether it is a residential or a commercial property, the...
Posted on: 02 March, 2017
Author: Alexander P
As further evidence of complexity of male pheromone odor compared with female odorour research shows the preliminary characterization of caudal organ odors of Apodemus avicollis Melchior (Stoddart, u... As further evidence of complexity of male pheromone odor compared with female odorour research shows the preliminary characterization of caudal organ odors of Apodemus avicollis Melchior (Stoddart, unpublished). Several peaks peculiar to the male are present and their identification and isolation are the subject of continuing pheromone studies. Mention was made above of the dual role played by the scent producing apparatus of some small mammals. There seems little doubt that cutaneous...
Posted on: 02 March, 2017
Author: Alexander P
One of the best documented aspects of human pheromone function in mammals is certainly in the control of the estrous cycle of the laboratory mouse (Whitten 1956b; 1959). While typically thought of as ... One of the best documented aspects of human pheromone function in mammals is certainly in the control of the estrous cycle of the laboratory mouse (Whitten 1956b; 1959). While typically thought of as 4 to 5-day periodicity; estrous cycles ranging up to 11-1 2 days may be easily produced and should be considered perfectly normal depending upon the presence or absence of male odors and the...