A Physiological Age-Grading System for Female Hydrellia pakistanae Deonier (Diptera: Ephydridae)

Use of this thesis is restricted to the UNT Community. Off-campus users must log in to read.

Description

Conflicting opinions about the effectiveness of H. pakistanae as a biological control agent for hydrilla prompt researchers to find a method for assessing the fly's success. Developing a physiological age-grading system for the fly using ovarian morphology to detect changes in reproductive activity is useful for evaluating reproductive status of the fly in field populations. Changes in the appearance of follicular relics in ovaries with oviposition provide a reliable method to estimate fecundity. Characteristics of follicular relics were used to develop a system with eight physiological age classes, three nulliparous and five parous. Changes that occur in the fat body ... continued below

Creation Information

Lenz, Jennifer Marie December 2002.

Context

This thesis is part of the collection entitled: UNT Theses and Dissertations and was provided by UNT Libraries to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 108 times . More information about this thesis can be viewed below.

Who

People and organizations associated with either the creation of this thesis or its content.

Publisher

Rights Holder

For guidance see Citations, Rights, Re-Use.

  • Lenz, Jennifer Marie

Provided By

UNT Libraries

The UNT Libraries serve the university and community by providing access to physical and online collections, fostering information literacy, supporting academic research, and much, much more.

Contact Us

What

Descriptive information to help identify this thesis. Follow the links below to find similar items on the Digital Library.

Degree Information

Description

Conflicting opinions about the effectiveness of H. pakistanae as a biological control agent for hydrilla prompt researchers to find a method for assessing the fly's success. Developing a physiological age-grading system for the fly using ovarian morphology to detect changes in reproductive activity is useful for evaluating reproductive status of the fly in field populations. Changes in the appearance of follicular relics in ovaries with oviposition provide a reliable method to estimate fecundity. Characteristics of follicular relics were used to develop a system with eight physiological age classes, three nulliparous and five parous. Changes that occur in the fat body were used to assist in classification of nulliparous females or those with low egg counts.

Language

Identifier

Unique identifying numbers for this thesis in the Digital Library or other systems.

Collections

This thesis is part of the following collection of related materials.

UNT Theses and Dissertations

Theses and dissertations represent a wealth of scholarly and artistic content created by masters and doctoral students in the degree-seeking process. Some ETDs in this collection are restricted to use by the UNT community.

What responsibilities do I have when using this thesis?

When

Dates and time periods associated with this thesis.

Creation Date

  • December 2002

Added to The UNT Digital Library

  • Sept. 26, 2007, 3:20 a.m.

Description Last Updated

  • Dec. 15, 2008, 10:30 a.m.

Usage Statistics

When was this thesis last used?

Yesterday: 0
Past 30 days: 1
Total Uses: 108

Interact With This Thesis

Here are some suggestions for what to do next.

Start Reading

PDF Version Also Available for Download.

International Image Interoperability Framework

IIF Logo

We support the IIIF Presentation API

Lenz, Jennifer Marie. A Physiological Age-Grading System for Female Hydrellia pakistanae Deonier (Diptera: Ephydridae), thesis, December 2002; Denton, Texas. (digital.library.unt.edu/ark:/67531/metadc3280/: accessed November 13, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .