Posted on: 02 March, 2017
Author: Alexander P
It has been suggested that bacterial strains which can as a rule be found in normal rat’s pheromone may play an important role in shaping the pheromone odor of individual animals (Reiffe 1956). ... It has been suggested that bacterial strains which can as a rule be found in normal rat’s pheromone may play an important role in shaping the pheromone odor of individual animals (Reiffe 1956). The tracks established by rats and mice within their pheromone ranges facilitate not only their own orientation and movements but also those of newcomers. The wolf also displays a similar habit of marking...
Continue ReadingPosted on: 02 March, 2017
Author: Alexander P
Wynne-Edwards (1962), while discussing the problem of pheromonal homeostasis, i.e. self regulation of natural populations of animals, introduced the concept of ‘epideictic displays’. He s... Wynne-Edwards (1962), while discussing the problem of pheromonal homeostasis, i.e. self regulation of natural populations of animals, introduced the concept of ‘epideictic displays’. He suggested that these are necessary to allow animals to regulate their pheromone numbers and that the special sites on which animals deposit their scent are part of these displays. Most frequently these special sites for scent deposition are dung- hills. Many species of animals form dung-hills (Altmann 1969; Mykytowycz and Gambale...
Continue ReadingPosted on: 02 March, 2017
Author: Alexander P
Although the use of different top pheromone attractants is the most obvious method of achieving reproductive isolation, many species apparently employ the same attractant system. In these cases rate o... Although the use of different top pheromone attractants is the most obvious method of achieving reproductive isolation, many species apparently employ the same attractant system. In these cases rate of pheromone release from the female may be a species-specific cue. Particular pheromone concentrations may be required to elicit male attraction, close-range searching behavior and copulatory attempts. Hierarchies of behavioral responses (antennal movement, wing uttering, anemotaxis, etc.) in which each successive...
Continue ReadingPosted on: 02 March, 2017
Author: Alexander P
In Ips the alleles which control both production and reception of pheromones are codominant and autosomal. If a male Ips which is heterozygous for a mutant pheromone allele breeds a female which is he... In Ips the alleles which control both production and reception of pheromones are codominant and autosomal. If a male Ips which is heterozygous for a mutant pheromone allele breeds a female which is heterozygous for a receptor allele keyed to the mutant pheromone, 1/4 of the progeny will be doubly heterozygous, l /2 will carry one mutant allele, and 1/4 will carry no mutant alleles. If...
Continue ReadingPosted on: 02 March, 2017
Author: Alexander P
Pheromones are found in rabbit litters are deposited in specially dug breeding chambers which, prior to parturition are lined with grass which is usually dry, and fur which the doe plucks from her bel... Pheromones are found in rabbit litters are deposited in specially dug breeding chambers which, prior to parturition are lined with grass which is usually dry, and fur which the doe plucks from her belly, chest and anks. Presumably this fur carries the scent of the female pheromones, particularly the inguinal scent, with which the kittens become familiar very early in their lives. The mother also deposits...
Continue ReadingPosted 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...
Continue ReadingPosted on: 02 March, 2017
Author: Alexander P
The evidence is increasing in support of Wright’s (1964) prediction that most insects use more than one attractant chemical. Pressures from sympatric upeciu. which utilize a common attractant, c... The evidence is increasing in support of Wright’s (1964) prediction that most insects use more than one attractant chemical. Pressures from sympatric upeciu. which utilize a common attractant, could contribute to the importance placed on secondary chemicals as a means of reducing communication interference. Con- tinued selection could result in the evolution of a pheromone system in which the secondary chemical becomes the main component and the original attt cunt chemical...
Continue ReadingPosted 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...
Continue ReadingPosted on: 02 March, 2017
Author: Alexander P
D. brevicomis and D. pseudotsugae, both of which are attracted to frontalin, could be maintained by the terpenes 3-carene and camphene in the respective host species (Pitman and Vité 1970). Subsequent... D. brevicomis and D. pseudotsugae, both of which are attracted to frontalin, could be maintained by the terpenes 3-carene and camphene in the respective host species (Pitman and Vité 1970). Subsequently it was found that oz-pinene is interchangeable with camphene in the D. pseudotsugae attractant (Rudinsky et al. 1972a) and that myrcene is a superior terpene synergist for the D. brevicomis attractant (Bedard et al. 1969). Detailed examination of...
Continue ReadingPosted on: 02 March, 2017
Author: Alexander P
Male Ips pini (Say) horing in pine logs produced an odor which attracted large numbers of beetles from the surrounding forest. Since that time, the top pheromones which promote populatlon aggregation ... Male Ips pini (Say) horing in pine logs produced an odor which attracted large numbers of beetles from the surrounding forest. Since that time, the top pheromones which promote populatlon aggregation have been demonstrated in over 30 species (Borden and Stokink 1971). Chemical identications and/or structures have been described for the pheromones of several species (see table 8.1). A considerable body of data has also accumulated on behavior...
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