Post-Emergence Development of Male Genitalia in Schistocerca Americana (Drury) (Orthoptera: Acrididae: Cyrtacanthacridinae)

Bibliographic Details
Main Author:	Song, Hojun
Language:	English
Published:	The Ohio State University / OhioLINK 2002
Subjects:	Entomology
Online Access:	http://rave.ohiolink.edu/etdc/view?acc_num=osu1420561049

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spelling	ndltd-OhioLink-oai-etd.ohiolink.edu-osu14205610492021-08-03T06:28:51Z Post-Emergence Development of Male Genitalia in Schistocerca Americana (Drury) (Orthoptera: Acrididae: Cyrtacanthacridinae) Song, Hojun Entomology Post-emergence development of male genitalia in Schistocerca americana (Orthoptera: Acrididae: Cyrtacanthacridinae) was studied. The present study demonstrates for the first time that the internal skeletal structures in the male genitalia continue to develop after the adult emergence. Also, the taxonomic use of the genitalic characters is reevaluated.An experiment was set up to examine the developmental patterns in the male genitalia and female ovipositor. The mechanism of the genitalic apodeme development is explained by the resilin deposition possibly affected by bursicon secretion. Overall, the structures affected by the cuticle deposition are the apodemes providing muscle attachment sites that enable the necessary movement during copulation. Non-changing structures in the genitalia may be directly involved in the internal courtship during copulation. Therefore, sexually immature individuals can be considered functionally incapable of copulation because the necessary structures have not been fully matured. In order to test if the post-emergence development is widespread, the different aged specimens of Schistocerca gregaria (Forskål) and Locusta migratoria (Linnaeus) were studied. Although the morphology was different between Schistocerca and Locusta, the overall developmental patterns were similar.The sexual maturation period of Schistocerca takes at least 30 days after the emergence. The life history theory predicts that the age at maturity is shaped by the trade-off between survival and reproduction. In Schistocerca, the structures associated with the flight mature earlier in adult development whereas the genitalia continue to develop for about thirty days after emergence. Delayed maturation is well explained by the life history theory when considering that the flight may be the most important trait for survival and that the reproduction is usually costly.A morphological phylogeny of the North American Schistocerca is proposed for the first time. The monophyly of the alutacea complex sensu Dirsh is not supported. I argue that the previous subspecies of S. alutacea are morphologically distinct species. The origin of S. gregaria and the evolution of swarming behavior are briefly discussed in the light of the present phylogenetic hypothesis. 2002 English text The Ohio State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=osu1420561049 http://rave.ohiolink.edu/etdc/view?acc_num=osu1420561049 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection	NDLTD
language	English
sources	NDLTD
topic	Entomology
spellingShingle	Entomology Song, Hojun Post-Emergence Development of Male Genitalia in Schistocerca Americana (Drury) (Orthoptera: Acrididae: Cyrtacanthacridinae)
author	Song, Hojun
author_facet	Song, Hojun
author_sort	Song, Hojun
title	Post-Emergence Development of Male Genitalia in Schistocerca Americana (Drury) (Orthoptera: Acrididae: Cyrtacanthacridinae)
title_short	Post-Emergence Development of Male Genitalia in Schistocerca Americana (Drury) (Orthoptera: Acrididae: Cyrtacanthacridinae)
title_full	Post-Emergence Development of Male Genitalia in Schistocerca Americana (Drury) (Orthoptera: Acrididae: Cyrtacanthacridinae)
title_fullStr	Post-Emergence Development of Male Genitalia in Schistocerca Americana (Drury) (Orthoptera: Acrididae: Cyrtacanthacridinae)
title_full_unstemmed	Post-Emergence Development of Male Genitalia in Schistocerca Americana (Drury) (Orthoptera: Acrididae: Cyrtacanthacridinae)
title_sort	post-emergence development of male genitalia in schistocerca americana (drury) (orthoptera: acrididae: cyrtacanthacridinae)
publisher	The Ohio State University / OhioLINK
publishDate	2002
url	http://rave.ohiolink.edu/etdc/view?acc_num=osu1420561049
work_keys_str_mv	AT songhojun postemergencedevelopmentofmalegenitaliainschistocercaamericanadruryorthopteraacrididaecyrtacanthacridinae
_version_	1719437653457240064

Post-Emergence Development of Male Genitalia in Schistocerca Americana (Drury) (Orthoptera: Acrididae: Cyrtacanthacridinae)

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