Posted on: 02 March, 2017
Author: Alexander P
Individual distance as any other pheromone space varies with the needs or requirements of an individual at a given time. As the production of odor from the skin glands is under the control of sex horm... Individual distance as any other pheromone space varies with the needs or requirements of an individual at a given time. As the production of odor from the skin glands is under the control of sex hormones, individual distances of aggressive animals or those in a pheromone reproductive state will be increased automatically with a repelling or attracting effect depending on their physiological state. Thus...
Posted on: 02 March, 2017
Author: Alexander P
Learn about the best aggregation pheromone. For example, frass expelled from the galleries, and male paraconfusus guts lose attraction in proportion to the number of females in the gallery, with attra... Learn about the best aggregation pheromone. For example, frass expelled from the galleries, and male paraconfusus guts lose attraction in proportion to the number of females in the gallery, with attraction being completely lost after three or four females are present (Borden 1967). In support of this result, Vité et al. (1972) found that male I. calligraphus joined by three or more females quickly cease to synthesize the frass...
Posted on: 02 March, 2017
Author: Alexander P
Let us return to our basic assumption, that if pheromone odors are to be used for social integration in small mammals that are unable to use visual and acoustic signals, we might expect that the total... Let us return to our basic assumption, that if pheromone odors are to be used for social integration in small mammals that are unable to use visual and acoustic signals, we might expect that the total range of messages to be transmitted is as wide as it is in those species able to use visual and acoustic signals. Surprisingly little attention has been paid...
Posted on: 02 March, 2017
Author: Alexander P
In another experiment, Boch and Morse (1979) divided a colony by a double screen partition and gave each half a queen. Although the top pheromone odours could freely pass though the screen each half w... In another experiment, Boch and Morse (1979) divided a colony by a double screen partition and gave each half a queen. Although the top pheromone odours could freely pass though the screen each half was able to recognize its own - queen when tested several days later, indicating that the queens had not acquired a similar pheromone odour. Therefore, adsorption of odour onto the body...
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
Pheromone olfactory signals are used to delineate the various types of space and are derived from feces, urine and specialized odor-producing skin glands. Changes in the ability to produce and perce... Pheromone olfactory signals are used to delineate the various types of space and are derived from feces, urine and specialized odor-producing skin glands. Changes in the ability to produce and perceive odors match the animals’ spatial requirements. Although the repelling role of spacing is usually emphasized, its attractive functions are just as important. While it is assumed that odor of occupied space is mainly for communication with conspecics there...
Posted on: 02 March, 2017
Author: Alexander P
Perhaps the male marking pheromone acts as an attractant and arrestant for the queen, but this has yet to be demonstrated experimentally. Perhaps it also acts as an aphrodisiac. The bioassay, mentione... Perhaps the male marking pheromone acts as an attractant and arrestant for the queen, but this has yet to be demonstrated experimentally. Perhaps it also acts as an aphrodisiac. The bioassay, mentioned above, to test the reactions of males to components of site marking pheromones could also be used to test their attractiveness to virgin queens. Queens must seek out the type of location where ight routes of...
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: 29 January, 2017
Author: Yuga Rishi Shriram Sharma
The number of factories, rail engines, electricity power stations, cars, airplanes etc are increasing with a mad pace. Heinous gases like carbon monoxide and sulfur dioxide emitted by diesel, petrol etc used by the above are rendering the air more and more polluted as days pass by. Due to population explosion in metro cities, cars moving creating traffic jams, factory emissions, more fuel used by every household and lack of greenery the measure of hazardous elements in air is increasing at an alarming speed. Increased population is now rushing towards big metro cities. It seems that means of entertainment and...
Posted on: 12 December, 2016
Author: Summit Lee
Sustainability is no longer an option; it’s a necessity. Industries face pressure from local, state, and federal regulations for environmental compliance with waste generation and management. ... Sustainability is no longer an option; it’s a necessity. Industries face pressure from local, state, and federal regulations for environmental compliance with waste generation and management. But sustainability is about more than just rules and restrictions. Intelligent, progress-minded companies understand the ecological importance, as well as the financial benefits, of optimizing their supply chain for sustainability. At January Environmental, environmental excellence isn’t a new-fangled “green” promise. It’s something they've always done, and something...