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E-grāmata: Toxicology of Reptiles

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Toxicology of Reptiles cohesively summarizes much of the cutting-edge research taking place in fields such as reptilian endocrinology, neurophysiology, immunology, and ecology. It also addresses conservation needs along with the complications often associated with population studies. The text is easy to synthesize and apply in the evaluation and understanding of potential risks to reptiles from environmental contaminants.

This book provides a comprehensive description of the current state of knowledge of reptilian toxicology from the perspective of target organ systems. It covers major contaminant classes within each chapter, focusing on those of greatest concern. The authors highlight the most pressing information gaps, and propose priority directions for further advancement in the fields of reptilian biology, wildlife and environmental toxicology, conservation, and ecological risk assessment.

Recenzijas

The book is well organized and eminently readable. Its strength relates to discussions of the challenges of increasing our knowledge of contaminant effects on reptile populations, both in the field and in the laboratory. Dr. R.H. Poppenga, Veterinary Pathology, Vol. 43, No. 6, 2006

This book and the investigators who have supported the research discussed within it prove that we are making great strides in the area of reptilian ecotoxicology. To the editors and authors congratulations on a much needed and comprehensive effort. To the readers give reptiles a try if you havent already. Linda Meyers-Schöne, Ph.D., Blue World Environment, from the Foreword

Introduction to Reptilian Toxicology
1(9)
Susan C. Gardner
Book Overview
1(1)
Reptilian Toxicology
1(6)
Summary
7(2)
Global Threats Affecting the Status of Reptile Populations
9(26)
Lisa Irwin
Kelly Irwin
Introduction
10(2)
Life History Characteristics and Ecologic Traits Related to Decline Susceptibility
12(3)
Life Span and Sexual Maturity
12(2)
Detectability of Population Declines
14(1)
Geographic Distribution
14(1)
Threats Resulting from Alteration or Loss of Habitat
15(3)
Conversion to Agriculture
15(1)
Deforestation
16(1)
Habitat Fragmentation
16(1)
Aquatic Habitat Alteration
17(1)
Coastal Development
17(1)
Loss of Wetlands
18(1)
Other Habitat Issues
18(1)
Threats Resulting from Nonanthropogenic Causes
18(2)
Disease
18(1)
Drought
19(1)
Stochastic Events
20(1)
Commercial Exploitation and Unsustainable Use
20(3)
Consumptive Uses
20(2)
Commercial Trade
22(1)
Pet Trade
22(1)
Other Threats
23(3)
Exotic and Invasive Species Introductions
23(2)
Indirect Impacts
25(1)
Summary
26(9)
Literature Cited
27(8)
Use of Tissue Residues in Reptile Ecotoxicology: A Call for Integration and Experimentalism
35(28)
William A. Hopkins
Introduction
35(3)
A Comment on Biological Effects
38(1)
A Call for Integration and Experimentalism
38(7)
Applying the Integrative Approach
45(9)
Mechanisms of Contaminant Uptake in Juveniles and Adults
45(2)
Mechanisms of Contaminant Uptake in Embryos
47(2)
Factors Influencing Accumulation and Distribution among Tissues
49(4)
Contaminant Transport in Ecologic Systems
53(1)
Summary
54(9)
Acknowledgments
55(1)
Literature Cited
56(7)
Tools for Assessing Contaminant Exposure and Effects in Reptiles
63(60)
Carys L. Mitchelmore
Christopher L. Rowe
Allen R. Place
Introduction
64(6)
Overview
64(1)
Tools to Assess Contaminant Exposure and Effects (Biomarkers)
65(3)
Assessing Contaminant Exposure and Effects in Reptiles --- Why?
68(2)
Current Status of Reptilian Biomarker Research
70(41)
Molecular Biomarkers
70(2)
mRNA Isolation
72(1)
Northern Blotting
73(1)
Quantitative Real-Time Polymerase Chain Reaction
74(3)
Open-Ended Methods
77(1)
Differential Display Reverse Transcriptase-Polymerase Chain Reaction
78(1)
Gene Arrays
78(1)
Biochemical Biomarkers
79(1)
Phase I Biotransformation; Cytochrome P450 Enzyme System
80(7)
Phase II Enzymes
87(3)
Antioxidant Enzymes and Factors
90(2)
Steroid Hormone and Protein Biomarkers
92(3)
Esterases
95(2)
Additional Plasma and Serum Endpoints
97(1)
Cellular Biomarkers
98(1)
Tissue and Organ System Biomarkers
99(1)
Gross Indices
100(1)
Histologic Endpoints
101(2)
Developmental Indicators
103(3)
Individual Responses
106(1)
Bioenergetics: Metabolic Pathways and Regulation of Growth and Reproduction
106(1)
Growth
107(1)
Reproduction
108(2)
Behavior
110(1)
Summary and Conclusions
111(12)
Literature Cited
112(11)
Hepatic, Renal, and Adrenal Toxicology
123(26)
Patricia McClellan-Green
Malin Celander
Eva Oberdorster
Introduction
124(1)
Liver Anatomy
124(1)
Liver Function in Homeostasis
125(4)
Carbohydrate Metabolism
126(1)
Lipid Metabolism
127(1)
Protein Metabolism and Vitellogenesis
128(1)
Liver Function in Metabolism of Xenobiotics
129(5)
Phase I and II Enzymes
130(2)
Antioxidant Defense System
132(2)
Disease of the Liver
134(1)
Kidney Anatomy
135(1)
Kidney Function in Homeostasis
136(4)
pH and Ion Balance
136(1)
Adrenals
137(1)
The Renin--Angiotensin and Vasopressin Systems
137(1)
Adrenal Functions and Stress
138(1)
Hormone Metabolism and Hormone Receptors
139(1)
Kidney Function in Metabolism of Xenobiotics and in Antioxidant Defense
140(1)
Kidney as a Target Organ for Metals
141(1)
Summary and Connections to Other
Chapters
141(8)
Literature Cited
141(8)
Developmental and Reproductive Effects
149(24)
Emily Willingham
An Overview
150(2)
Focusing on Endocrine Disruptors
150(1)
Temperature-Dependent Sex Determination
150(2)
Signal Interference: Disrupting a Delicate Developmental Balance
152(4)
Developmental Mechanisms
153(1)
A Mechanistic Example Using the Reptilian Developmental Model
154(2)
Species-Specific Considerations
156(1)
A Toxicologic Shift
156(7)
Reptilian Models
159(1)
No Threshold/Low Doses/Ecologic Relevance
159(1)
Endpoints: Hidden Disruption
160(1)
Considering Mixture Effects During Development
160(1)
Developmental Synergy
161(1)
Species-Specific Considerations
162(1)
The State-of-the-Science for Developmental Investigations in Reptiles
163(3)
Turtles
163(1)
Crocodilians
164(1)
Squamates
165(1)
Future Considerations
166(7)
Literature Cited
167(6)
Neurotoxicology and Behavioral Effects in Reptiles
173(26)
Joanna Burger
Introduction
174(1)
Major Issues with Neurotoxicology and Behavioral Effects Studies
175(5)
Study Design
175(3)
Host Differences
178(1)
Family and Species Vulnerabilities
179(1)
Individual vs. Populations
179(1)
Fate to Effects: The Problem with Reptile Studies
180(1)
The Nervous System
181(2)
Comparative Neuroanatomy
181(1)
Neuroendocrine Axis
182(1)
From Brain to Behavior
182(1)
Reptilian Models of Neurobehavioral Deficits
183(6)
Neurobehavioral Effects
183(1)
Temperature-Dependent Neurobehavioral Effects in Pine Snakes (Pituophis melanoleucus)
184(1)
Neurobehavioral Deficits from Lead Exposure in Slider Turtles (Trachemys scripta)
185(3)
Other Neurobehavioral Effects That Can Serve as Models
188(1)
Endocrine Disruption and Neurotoxicology
189(1)
Summary and Research Directions
189(10)
Summary
189(1)
Future Research Needs
190(3)
Acknowledgments
193(1)
Literature Cited
194(5)
Immunotoxicology and Implications for Reptilian Health
199(42)
Jennifer M. Keller
Margie M. Peden-Adams
A. Alonso Aguirre
Introduction to the Reptilian Immune System
200(4)
Wildlife Immunotoxicology
204(1)
Reptilian Immunotoxicology
204(18)
Western Fence Lizards
205(1)
Box Turtles
205(1)
American Alligators
206(1)
DDT and Dicofol
206(1)
2,3,7,8-Tetrachlorodibenzo-p-Dioxin
207(1)
DDE, TCDD, and Phytoestrogens
208(2)
Sea Turtles
210(1)
Petrochemicals
211(2)
Organochlorine Contaminants
213(6)
Heavy Metals
219(1)
Fibropapillomatosis
220(2)
Future Directions
222(9)
Testing Additional Contaminant Classes
223(1)
Choosing Reptilian Model Species
223(1)
Improving Immune Assessment Tools
224(1)
General Considerations
225(2)
Hematology Tools
227(1)
Innate Immunity Tools
228(1)
Acquired Immunity Tools
228(2)
Host-Resistance Tools
230(1)
Conclusions
231(10)
Acknowledgments
231(1)
Literature Cited
232(9)
Reptilian Genotoxicity
241(26)
Apolonia Novillo
Noppadon Kitana
Emily Marquez
Ian P. Callard
Introduction
242(4)
Historical Perspective of Genotoxicity and Genetic Ecotoxicology
242(1)
Genotoxic Compounds and Agents in the Environment
243(1)
Linking the Mechanism of Genotoxicity with Its Consequences
244(2)
The Use of Reptilian Species in the Study of Aquatic and Terrestrial Genotoxicity
246(6)
Biomarkers of Exposure and Effect in Reptilian Populations
249(1)
DNA Damage as a Biomarker of Exposure
249(2)
Neoplasia as a Biomarker of Effect
251(1)
Reptilian Models for Studies of Genotoxicity
252(7)
Chelonia
252(1)
Direct DNA Damage
252(2)
Potential Reproductive Impairments
254(1)
Potential Immune Suppression
255(1)
Squamates
256(1)
Tumorigenesis
256(1)
Radiation Studies
257(1)
Suggestions for Future Models
257(1)
Crocodylia
258(1)
Summary
259(8)
Acknowledgments
260(1)
Literature Cited
260(7)
Reptile Ecotoxicology: Studying the Effects of Contaminants on Populations
267(32)
Kyle W. Selcer
Populations: Theory and Background
268(5)
Ecotoxicology and the Importance of Population Studies
268(2)
Why Study Reptiles? Implications for Ecotoxicology
270(1)
Properties of Populations
271(1)
Impact of Contaminants on Populations
272(1)
Life History Characteristics
273(5)
Life History Strategies
273(1)
Life History Strategies of Reptiles
274(1)
Clutch Size or Offspring Number
275(1)
Egg or Offspring Quality
276(1)
Frequency of Reproduction
276(2)
Age and Size at First Reproduction
278(1)
Difficulties with Reptile Toxicology at the Population Level
278(4)
Separating Effects of Contaminants from Other Factors
278(1)
Selecting Appropriate Endpoints
279(1)
Unique Aspects of Reptile Populations
280(1)
Current Needs and Future Directions
281(1)
Need for Reptile Contamination Studies to Include Population Parameters
281(1)
Need for Nondestructive Sampling
281(1)
Need to Identify Reptile Model Organisms to Serve as Sentinels, Surrogates, and Bioindicators
282(1)
Candidate Reptile Species for Use as Sentinels
282(17)
Chelonia (Turtles)
282(1)
Freshwater Aquatic Turtles
283(1)
Red-Eared Slider Turtle (Trachemys scripta)
284(1)
Painted Turtle (Chrysemys picta)
284(1)
Snapping Turtle (Chelydra serpentina)
284(1)
Softshell Turtles (Apalone spp.)
285(1)
Diamondback Terrapin (Malaclemys terrapin)
285(1)
Sea Turtles
285(1)
Terrestrial Turtles
286(1)
Box Turtles (Terrapene spp.)
286(1)
Desert Tortoises (Gopherus spp.)
286(1)
Lacertes (Lizards)
287(1)
Fence and Prairie Lizards (Sceloporus undulatus and S. occidentalis)
287(1)
Mediterranean Gecko (Hemidactylus turcicus)
288(1)
Green Anole (Anolis carolinensis)
288(1)
Serpentes (Snakes)
288(1)
Water Snakes (Nerodia spp.)
289(1)
Garter Snakes (Thamnophis spp.)
289(1)
Crocodylia (Alligators and Crocodiles)
290(1)
American Alligator (Alligator mississippiensis)
290(1)
Literature Cited
290(9)
Index 299


Susan C. M. Gardner, Eva Oberdorster