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The crustaceans are ecologically and economically important organisms. They constitute one of the dominant invertebrate groups on earth, particularly within the aquatic realm. Crustaceans include some of the preferred scientific model organism, profitable aquaculture specimen, but also invasive nuisance species threatening native animal communities throughout the world. Chemoreception is the most important sensory modality of crustaceans, acquiring important information about their environment and picking up the chemical signals that mediate communication with conspecifics.

Significant advances have been made in our understanding of crustacean chemical communication during the past decade. This includes knowledge about the identity, production, transfer, reception and behavioral function of chemical signals in selected crustacean groups. While it is well known that chemical communication is an integral part of the behavioral ecology of most living organisms, the intricate ways in which organisms allocate chemicals in communication remains enigmatic. How does the environment influence the evolution of chemical communication? What are the environmental cues that induce production or release of chemicals? How do individuals economize production and utilization of chemicals? What is the importance of molecule specificity or mix of a molecule cocktail in chemical communication? What is the role of chemical cues in multimodal communication? How does the ontogenetic stage, the sex or the physiological status of an individual affect its reaction to chemical cues? Many of these questions still represent important challenges to biologists.

Chemical Communication in Crustaceans

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This book is the fifth in a series on the subject of chemical signals, arising out of international conferences held every three years since 1976. This volume contains both substantial reviews and original research reports. Chemical cues and signals, usually in the form of odors, play a significant role in the lives of domestic and wild animals. Odors may attract or repel. They influence feeding and mating behavior, detection of predators and prey, social and spatial structure within groups, and the defense of territories. Biologists are continually refining their understanding of these phenomena and find ever more complex relationships among the chemical properties of the odor-producing substances, the physiological mechanisms of olfactory detection, and the behavioral responses of different kinds of vertebrates, and of the two sexes, under varying conditions. Researchers and scientists in the animal sciences will find this book of particular interest.

Chemical Signals in Vertebrates 5

Chemical Signals in Vertebrates

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This digital document is a journal article from Journal of Experimental Marine Biology and Ecology, published by Elsevier in . The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
Mating in the Chinese mitten crab (Eriocheir sinensis) was examined; in particular the nature of mating and the role of sex pheromones. A semi-lunar periodicity (16.8 days and 14.5 days, respectively) was observed in the mating frequencies in two consecutive breeding seasons (2001-2002 and 2002-2003). This semi-lunar rhythm coincided with spring tides (full and new moon), and activity peaked in November. Observation of the progression of specific behaviour types in mating and non-mating pairs revealed that pairs which would go on to complete mating progressed from fighting to mating behaviour significantly faster than non-mating pairs. These findings indicate that mate recognition occurs only after physical contact. Reproductively active pairs (ascertained from mating experiments) were then used for several bioassays aiming to assess under which conditions pheromones may be released by females. Firstly, male E. sinensis were exposed to female smell in an actograph experiment and secondly, male antennule flick rate was recorded before and after exposure to the urine of a sexually active female. In both cases no change in male E. sinensis behaviour was observed. Both experiments used females which had not had immediately prior exposure to males. However, in further experiments using water where mating had occurred, a significant response in antennule flick rate was triggered. Finally, a sponge assay was used in order to test the male attraction to a sponge injected with a water sample of varying concentrations (0.5x, 1x, 3x, 4.5x, 9x) of female smell. These samples were conditioned using a female immediately following a mating attempt. Males tried to grasp the sponge at 3x increased concentrations or higher. In conclusion, this study found no indication that E. sinensis females release a distance pheromone, but instead that mate recognition occurs after physical contact between male and female, most likely via a contact pheromone.

Mating behaviour and chemical communication in the invasive Chinese mitten crab Eriocheir sinensis

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This digital document is an article from Canadian Chemical News, published by Chemical Institute of Canada on July 1, 1996. The length of the article is 814 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.

Citation Details
Title: Chemical caste differentiation in honey bees.
Author: Erika Plettner
Publication: Canadian Chemical News (Magazine/Journal)
Date: July 1, 1996
Publisher: Chemical Institute of Canada
Volume: v48 Issue: n7 Page: p12(2)

Distributed by Thomson Gale

Chemical caste differentiation in honey bees.: An article from: Canadian Chemical News

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This digital document is an article from Canadian Chemical News, published by Chemical Institute of Canada on November 1, 2009. The length of the article is 529 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available immediately after purchase. You can view it with any web browser.

Citation Details
Title: Bawdy buzz.(CHEMICAL NEWS/ACTUALITE CHIMIQUE)
Author: Unavailable
Publication: Canadian Chemical News (Magazine/Journal)
Date: November 1, 2009
Publisher: Chemical Institute of Canada
Volume: 61 Issue: 10 Page: 9(1)

Distributed by Gale, a part of Cengage Learning

Bawdy buzz.: An article from: Canadian Chemical News

Chemical Communication: the language of pheromones. . 1992.

The impact of the occurence of pheromones in host plants on the application of synthetic pheromones to alter chemical signaling: Final report

Sex pheromones of butterflys as a model of chemical communication =: Sexualpheromone der Schmetterlinge als Modelle chemischer Kommunikation

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High Quality Content by WIKIPEDIA articles! 11-cis-Vaccenyl acetate (cVA) is a volatile chemical compound that acts as a pheromone in Drosophila. It is the acetate ester of vaccenyl alcohol. The odorant receptor subunit Or67d was shown to be necessary and sufficient for detection of cVA. Males that are mutant for Or67d start courting other males, whereas females that lack Or67d become less receptive towards males courting them. The sensory neurons expressing Or67d send projections to the glomerulus DA1.

Vaccenyl Acetate: Pheromone, Drosophila, Acetate, Odorant Receptorm, Sensory Neurons, Glomerulus, Chemical, Hormone, Alarm Signal