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    Pheromones

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    Pheromones: Chemical Messanger Have you ever wonder how does an insect communicate? Unlike other living organisms‚ insects don’t have the ability to speak and communicate. Some insects may even look like they have eyes but they cannot see through them. So how does these insects communicate with each other? Simple‚ they send chemical signals that can easily be detected by other insects of their own kind. These chemicals are called pheromones. These are some examples of insects that contain and

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    Pheromones

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    Pheromones Pheromones are chemical signals that are used among insects or animals to communicate and to convey messages among species of the same colony. The messages that pheromones convey have to do with behavior and physiological functions. In other words‚ pheromones are hormones that are excreted and act outside of the body. The word “Pheromones” comes from Greek which means “carrier of excitation”. The purpose why animals and insects excrete these hormones is: to convey the message that

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    Pheromones

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    PHEROMONES 1. INTRODUCTION What are pheromones? Pheromones‚ as defined by John W. Kimball‚ are chemicals released by an organism into its environment enabling it to communicate with other members of its own species. The term Pheromones (originates from two Greek words‚ pherein meaning transfer and hormone meaning to excite or stimulate)‚ as proposed by Karlson and Luscher(1959) was used to describe a chemical secreted by an animal to release a specific reaction that triggers members of

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    Mammalian Pheromones

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    Topic 6: Mammalian Pheromones Abstract A pheromone is a chemical signal which is released by one animal and received by another‚ which induce a species specific reaction. Pheromones are detected via chemosensory systems known as the Vomeronasal Organ (VNO). Within a wide range of mammals the VNO is used to elicit a generalized sexual response‚ primarily affecting the reproductive tract. This is seen in most terrestrial mammals who have adapted to sensing volatile chemical signals; the Mouse displays

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    Sex Pheromones in Insects

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    Rory Atteridge 0603612E Sex Pheromones in the Insects Introduction Sex pheromones are chemicals or odours given off by an individual in order to invoke a sexual response or behaviour change on individuals of the same species (Shorey 1973). These chemicals can be released by males and/or females‚ depending on the species (Gieselhardt et al. 2008‚ Ayasse et al. 2001). Pheromones generally consist of a carbon backbone of between 10 and 20 carbon atoms (in Lepidoptera)‚ these are however

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    Blue Eyes Pheromone Review - Can Men Bank On This For Attraction? Find Out Here! From the inception of life‚ it has always been the story of man and woman. One can attest to this with the story of Adam and eve in the Garden of Eden. The move to attract the opposite sex by the male folks didn’t start today and seems not to end today rather; more researches are being done on daily if not hourly basis to improve on this. For a fact‚ Science is not left out in this‚ it has and still does all it can

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    RUNNING HEAD: PHEROMONES 1 Pheromones and their Effects on Human’s Sexual Attractiveness Yesenia Rogers Diablo Valley College PHERMONES 2 Abstract This paper talks about what pheromones are and how they work. It will also talk

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    Alarm Signal Senders. The American Naturalist.‚ 148(4): 649-659. Dittman‚ Andrew H. and Thomas Quinn. 1996. Homing in Pacific Salmon: Mechanisms and Ecological Basis. The Journal of Experimental Biology.‚ 199: 83-91. Honda‚ Haruo. 1980. Female Sex Pheromone of Rainbow Trout‚ Salmo gairdneri‚ Involved in Courtship Behaviour. Bulletin of the Japanese Society of Scientific Fisheries.‚ 46(9): 1109-1112. Krause‚ J.‚ G.D. Ruxton‚ and D. Rubenstein. 1998. Is there always an influence of shoal size on predator

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    Nt1330 Exercise 1.1

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    1.6.1.1 Basic principles of trail laying Ants may lay pheromone trails when travelling from the nest to food‚ or from food to the nest‚ or when travelling in either direction depending on the species. They also follow these trails with a allegiance which is a function of the trail strength‚ among other variables. Ants drop pheromones as they walk by stopping briefly and touching their gaster‚ which carries the pheromone secreting gland‚ on the ground. The strength of the trail they lay is a function

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    of ant colonies. It is different from the managerial term hierarchy. In dense heterarchy‚ the structure is horizontal‚ contrary to hierarchy Pheromone: In real life‚ pheromone refers to the chemical material that an ant spreads over the path it goes and the level of it changes over time by evaporating. On the other hand‚ in ant colony optimization‚ pheromone is a parameter. The amount of this parameter determines the intensity of the trail. The intensity of the trail can be viewed as a global memory

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