The Polymorphism of Ants
Author : William Morton Wheeler
Publisher :
Page : pages
File Size : 49,27 MB
Release : 1908
Category :
ISBN :
Author : William Morton Wheeler
Publisher :
Page : pages
File Size : 49,27 MB
Release : 1908
Category :
ISBN :
Author : W M Wheeler
Publisher : Palala Press
Page : pages
File Size : 26,32 MB
Release : 2016-05-24
Category :
ISBN : 9781359360519
This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Author : William Morton Wheeler
Publisher :
Page : 1134 pages
File Size : 12,52 MB
Release : 1907
Category : Ants
ISBN :
Author : E O Wilson
Publisher : Hassell Street Press
Page : 22 pages
File Size : 39,64 MB
Release : 2021-09-09
Category :
ISBN : 9781013764042
This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Author : Christopher K. Starr
Publisher : Springer
Page : 0 pages
File Size : 24,83 MB
Release : 2021-01-10
Category : Science
ISBN : 9783030281014
A comprehensive, multi-author treatise on the social insects of the world, with some auxiliary attention to such adjacent topics as subsocial insects and social arachnids. The work is to serve as a very convenient, yet authoritative reference work on the biology and systematics of social insects of the world. This is a project of the International Union for the Study of Social Insects (IUSSI), the worldwide organizing body for the scientific study of social insects.
Author : William Morton Wheeler
Publisher :
Page : 93 pages
File Size : 49,24 MB
Release : 1907
Category : Ants
ISBN :
Author : W. M. Wheeler
Publisher :
Page : pages
File Size : 43,88 MB
Release : 1900
Category :
ISBN :
Author : Giovanna De Blasis
Publisher :
Page : pages
File Size : 20,75 MB
Release : 2020
Category :
ISBN :
"The evolution and regulation of novel castes has contributed to the ecological and evolutionary success of ants. Ant colonies are composed of at least two castes: a winged queen caste and a wingless worker caste. The worker caste of most ants is monomorphic, which means it is composed of morphologically similar individuals. However, in some of the most successful genera of ants the worker caste evolved into two or more subcastes several times independently. The evolution of a worker caste with significant inter-individual variation in size and head-to-body scaling is called worker polymorphism. Despite being wingless, the worker caste of most ant genera possesses rudimentary wing imaginal discs. One function of these rudiments is that of generating the novel soldier caste of the hyper-diverse ant genus Pheidole, a worker polymorphic genus where the worker caste is divided into small minor workers and soldiers with a disproportionally bigger head. This thesis is centered on the generation and regulation of worker polymorphism. We first investigated whether the rudimentary wing imaginal discs of a monomorphic species, Tetramorium immigrans, have the inherent ability to generate worker polymorphism. We discovered that, while these rudiments appear to be non-responsive to hormonal activation, juvenile hormone (JH) treatment is able to induce a proportional increase in both body size and head width independently of the rudimentary wing imaginal discs. The generation of simple worker polymorphism, termed monophasic allometry, from monomorphism has been suggested to start with an increase in the phenotypic size variation of the worker caste. Therefore, we propose that while the activation of rudimentary wing discs might be necessary to generate disproportionate growth, the phenotypic effects of JH independently of the discs might be a necessary first step to achieve worker polymorphism. We then investigated the chemical basis of worker polymorphism regulation. In Pheidole, the ability of a colony to dynamically regulate the proportion of soldiers and minor workers is important for its overall success. Colony demography is therefore regulated by many factors. For example, soldiers limit the number of soldiers produced if there are too many soldiers in a colony by halting the growth of their rudimentary wing imaginal discs. These rudiments, in fact, mediate the interaction between JH activation and soldier inhibition to regulate size, head-to-body scaling, and subcastes ratios. Soldier inhibition is achieved through a soldier-produced pheromone composed of cuticular hydrocarbons (CHCs), but minor workers and soldiers are only quantitatively different in their CHCs profiles. Using Pheidole dentata, we confirmed that soldiers CHCs inhibit soldier development and revealed a potential role for minor workers CHCs to activate the soldier program. Additionally, we discovered that CHCs appear to not have an inhibitory ability in the triphasic genus Camponotus, which is characterized by a more continuous worker caste with minor, media, and major workers. These findings suggest that the evolution of discrete castes like those of Pheidole might have been achieved through the evolution of adaptive inhibitory mechanisms that function to eliminate media workers in a triphasic system and give rise to a dimorphic one. Taken together, the results of this thesis integrate the developmental and chemical aspects that facilitated the generation and regulation of complex worker caste systems to elucidate some of the processes that contributed to the success of ants and to the evolution and regulation of biological complexity"--
Author : E O Wilson
Publisher : Hassell Street Press
Page : 22 pages
File Size : 34,19 MB
Release : 2021-09-09
Category :
ISBN : 9781014351852
This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Author :
Publisher :
Page : pages
File Size : 40,80 MB
Release :
Category :
ISBN :