Notice: Restrictions
NOTICE: The copyright law of the United States (Title 17, United States Code) governs the making of reproductions of copyrighted material. One specified condition is that the reproduction is not to be "used for any purpose other than private study, scholarship, or research." If a user makes a request for, or later uses a reproduction for purposes in excess of "fair use," that user may be liable for copyright infringement. RESTRICTIONS: This student work may be read, quoted from, cited, for purposes of research. It may not be published in full except by permission of the author. Per request from author do not reproduce this work in print. Honors Project Thesis: An Assessment of Native and Non-Native Crayfish Populations in Six Tributaries of the West Branch of the Susquehanna River Submitted by: Michelle Herman Advisors: Drs. Peter Petokas and Melvin Zimmerman 2 Table of Contents: I. Introduction 4 A. Crayfish Classification, Biology, Ecology and Current Conservation Status 4 B. Historical Crayfish Population Studies in the Susquehanna River Basin 11 C. Hypotheses and Objectives of Current Study 14 II. Methods 17 A. Description of the Study Area 17 B. Field Sampling Procedures 22 Tables and Figures 27 C. Lab Sampling Procedures 30 Tables and Figures 32 III. Results 33 A. Species Occurrence 33 B. Morphometry 34 Tables and Figures 38 C. Demographics 63 Tables and Figures 65 IV. Discussion 73 A. Species Occurrence 73 B. Morphometry 84 C. Demographics 90 V. Conclusions 97 VI. References 99 VII. Acknowledgments 102 Appendices: I. Crayfish Morphometric Data 103 II. Sample Site Water Chemistry Data 131 3 INTRODUCTION Crayfish Classification, Biology, Ecology and Current Conservation Status Crayfish belong to order Decapoda, a diverse group of crustaceans that also includes the familiar lobsters, crabs and shrimps.
[Show full text]