About Book

Vertebrates are animals with a backbone, also known as a spinal column. Vertebrates are named for their vertebra, segmented sections of the spinal column. These segmented sections give the spinal column some flexibility while maintaining its strength. The vertebras are surrounded by nerve fibers that deliver commands, via electrical signals, from the brain to all the limbs. All vertebrates are built along the basic chordate body plan: a stiff rod running through the length of the animal with a hollow tube of nervous tissue above it and the gastrointestinal tract below. Vertebrates represent the overwhelming majority of the phylum chordata, with currently about 69,963 species described. The vertebrates are also characterized by a muscular system consisting primarily of bilaterally paired masses and a central nervous system partly enclosed within the backbone. This aim of this book is to give details about advanced research on vertebrates. It elucidates the concepts and innovative models around prospective development with respect to vertebrates. It deals with various topics such as wildlife vertebrates, spinal muscular atrophy, vertebrate host specificity, spermatozoa of vertebrates, experimental ischemia, sex determination in vertebrates and circadian clocks in vertebrates. While understanding the long-term perspectives of the topics, the book makes an effort in highlighting their impact as a modern tool for the growth of the discipline. Selected concepts that redefine the field have been presented in this book. The book is appropriate for those seeking detailed information in this area.

Preface............................................................................................................v

Chapter 1 Light-Dependent Regulation of Circadian Clocks in

Vertebrates ...................................................................................................1

Abstract...................................................................................................1

1. Introduction ..........................................................................................1

2. Cellular-clock regulation in mammals..............................................3

3. Photoreceptors for circadian-clock regulation in mammals .......3

4. Light-dependent transcription in the mammalian retina.............5

5. Light-dependent transcription in mammalian SCN.......................5

6. Light-dependent synchronization of cellular clocks in the

mammalian SCN...................................................................................7

7. Cellular-clock regulation in zebrafish...............................................8

8. zPER2, zCRY1a, and zCRY2a are required for the light-dependent

ontology of circadian clocks during development.........................8

9. Light signaling pathway regulating cellular clocks in zebrafish

cells..........................................................................................................9

10. Role of redox signaling in cellular-clock regulation by light in

zebrafish................................................................................................10

11. Link between circadian clocks and light-dependent DNA repair

in zebrafish...........................................................................................11

12. Conclusion............................................................................................12

Acknowledgements.............................................................................12

Chapter 2 Comparison of Sex Determination in Vertebrates

(Nonmammals)...........................................................................................19

Abstract.................................................................................................19

1. Introduction..........................................................................................19

2. Features of sex determination in fishes..........................................21

3. Sex in amphibians...............................................................................28

4. Sex in reptiles: determination of sex under the influence of

temperature..........................................................................................31

5. Sex determination in bird..................................................................33

6. Conclusion............................................................................................36

Acknowledgements.............................................................................37

Chapter 3 Kinetic Vitrification of Spermatozoa of Vertebrates:

What Can We Learn from Nature?†....................................................................................... 42

1. Introduction..........................................................................................42

2. Brief history of kinetic vitrification of sperm and cryobiology in

general related to the goal of this Chapter ..................................47

3. Five basic methods of long-term cell biostabilization:

pro’s & con’s ......................................................................................51

4. Equilibrium vs. kinetic vitrifcation; Evolution of the “Fahy’s”

phase diagram ....................................................................................63

5. Kinetic vitrification of sperm: why some species have while

others have not been vitrified? .......................................................68

6. Conclusion: “Race for the Pace ”: Is the universal cryo-protocol

possible? ..............................................................................................76

Chapter 4 Zoonotic Peculiarities of Borrelia burgdorferi s.l.: Vectors

Competence and Vertebrate Host Specificity.....................................91

1. Introduction..........................................................................................91

2. Borrelia burgdorferi s.l. genospecies diversity and association with

vectors and reservoirs .......................................................................92

3. Ticks–Borreliae interface ...................................................................94

4. Vertebrates species specificity .......................................................105

5. Conclusion .........................................................................................111

6. Acknowledgment .............................................................................112

Chapter 5 Modeling Spinal Muscular Atrophy in Mouse: A Disease of

Splicing, Stability, and Timing...........................................................127

1. Introduction........................................................................................127

2. Genetic cause of SMA, reduced levels of SMN protein...........128

3. Genetic modeling of SMA in mouse.............................................130

4. Addressing the tissue specificity and timing of SMN expression

in mouse models of SMA ..............................................................135

5. SMN snRNP function and splicing in SMA mouse models ..138

6. Neurological manifestations in SMA mouse models ...............140

7. Cardiac and pulmonary involvement .........................................142

8. Therapeutic approaches in SMA treatment ...............................143

9. Summary and conclusion ..............................................................144

10. Acknowledgements .........................................................................145

Chapter 6 Importance of the Arterial Blood Supply to the Rabbit and

Guinea Pig Spinal Cord in Experimental Ischemia.......................156

Abstract ..............................................................................................156

1. Introduction........................................................................................157

2. Materials and methods....................................................................158

3. Results.................................................................................................161

4. Discussion...........................................................................................180

5. Conclusion..........................................................................................183

Chapter 7 Describing Parasite Biodiversity: The Case of the Helminth Fauna of Wildlife Vertebrates in Mexico......................................................189

1. Introduction........................................................................................189

2. Gathering the data ..........................................................................193

3. Species richness patterns ................................................................194

4. Helminth parasite survey work: The future................................206

5. Conclusion .........................................................................................209

6. Acknowledgments ...........................................................................212

Citation......................................................................................................219

Index...........................................................................................................221

About Author

Timothy Allen pursued his Ph.D. in Zoology from University of Science, Phoenix. In his researches, he has discussed embryology, anatomy, physiology, biochemistry, paleontology, and ecology of all vertebrates. He serves as an Assistant Professor at Science College, Montreal. Allen has contributed dozens of research papers and journals on central nervous system of vertebrates, phylogenetic relationships between animals and reproductive systems. He holds prominent memberships of international associations and has been an active participant at international conferences and forums.