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Presentations involving slides l.jpg

  • The following file exemplifies:

  • Title slides

  • Using figures to complement text.

  • Placing citations within slides (they should be subtle and not distract the audience from the content)

  • Full citations at the end of a presentation (given this slide, anyone should be able to find all of the source material you used in preparing your presentation

  • Acknowledgments (help received in preparation of the presentation)

  • It does not exemplify the topic of your presentation or the number of slides you should use

Presentations involving slides


The truth behind wing song testing the good genes theory in drosophila melanogaster l.jpg

The Truth Behind Wing-Song:Testing the good-genes theory in Drosophila melanogaster.

[Modified from presentation given by]

Larry Cabral

Research Methods in Biological Sciences, Bio 220

CSU, Sacramento


Introduction l.jpg
Introduction

Good-Genes Theory

Females chose males based on their genetic quality (Anderson 1994).


Introduction4 l.jpg
Introduction

Secondary Sex Traits:

are sensory displays that raise the success of the possessor in competition over

mates (Anderson 1994).


Introduction5 l.jpg
Introduction

The Thesis Project:

is a good-genes theory test that focuses on wing-song.


Introduction6 l.jpg
Introduction

  • Apply a thermal stress

  • Net reproductive rate

  • Compare populations


Introduction7 l.jpg

Honest Signal

The wild-type population will evolve thermal tolerance quicker then the nubbin population.

“Dishonest” Signal

There will not be a significant difference in the rate of evolving thermal tolerance between the populations.

Introduction


Introduction8 l.jpg
Introduction

Sensory Bias

Traits are favored because they already fit an existing sensory bias in females

(Ryan 1990).


Introduction9 l.jpg
Introduction

Chase-Away Theory

Females evolve resistance to courtship due to male induced harm

(Holland and Rice 98).


Introduction10 l.jpg
Introduction

Hypothesis

There will not be a significant difference in the rate of evolving thermal tolerance between the populations.


Materials methods the fruit fly l.jpg
Materials & Methods: The Fruit Fly


Materials methods l.jpg
Materials & Methods

Samples

Vail: Seven males and seven females

Replicate: 15 vials

Population: Four replicates


Materials methods13 l.jpg
Materials & Methods

Subsequent Generations

  • After laying eggs adults are cleared

  • Vials placed Into incubator

  • After 14 days adults are collected and counted.

  • Assign mates


Materials methods14 l.jpg
Materials & Methods

Environment:

  • 12 hour photo period

  • The first four generations at 25C

  • Remainder of experiment under thermal protocol


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Materials & Methods

THERMAL PROTOCOL (Holland 2002)


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Materials & Methods

Food:

  • Shelf-life of four weeks

  • Food prepared for every generation.


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Materials & Methods

Statistical Analysis

SPSS 11.0 Software

Two-tailed t-test

Alpha Risk Level of .05


Materials methods18 l.jpg
Materials & Methods

Time

26 Generations

At least one year to complete


Materials methods19 l.jpg
Materials & Methods

Location

  • California State University, Sacramento

  • Sequoia Hall

  • Basement

    Room 38


References l.jpg

Anderson, M. 1994. Sexual selection. Princeton Univ. Press,

Princeton, NJ.

Ashburner, M. 1990. Drosophila: a laboratory handbook. Cold

Spring Harbor Laboratory Press, Cold Spring Harbor, NY.

Basolo, A. L. 1990. Female preference predates the evolution of

the sword in swordtail fish. Science 250:808–180.

Bateman, A. J. 1948. Intra-sexual selection in Drosophila. Heredity

2:349–368.

Chapman, T., L. F. Liddle, J. M. Kalb, M. F. Wolfner, and L.

Partridge. 1995. Cost of mating in Drosophila melanogaster females

is mediated by male accessory gland products. Nature 373:

241–244.

Endler, J. A., and A. L. Basolo. 1998. Sensory ecology, receiver

biases and sexual selection. Trends Ecol. Evol. 13:415–410.

Enquist, M., and A. Arak. 1993. Selection of exaggerated male

traits by female aesthetic senses. Nature 361: 446-448.

Fowler, K., and L. Partridge. 1989. A cost of mating in female

fruit flies. Nature 338:760–761.

Holland, B., and W. R. Rice. 1998. Chase-away sexual selection:

antagonistic seduction versus resistance. Evolution 52:1–7.

Holland, B. 2001. Sexual selection fails to promote adaptation to a

new environment. Evolution 56:721-730.

James, A. C., and L. Partridge. 1995. Thermal evolution of rate of

larval development in Drosophila melanogaster in laboratory

and field populations. J. Evol. Biol. 8:315–330.

Kirkpatrick, M. 1987. Sexual selection by female choice in polygynousanimals. Annu. Rev. Ecol. Syst. 18:43–70.

Krebs, J. R., and N. R. B. Davies, 1993. The Design of Signals: Ecology and Evolution, Pp. 349–374 in: An Introduction to Behavioural Eco- logy Behavioural Ecology (Third Edition). Blackwell, Oxford, U.K.

Moller, A.P. 1988. Female choice selects for male sexual tail

ornaments in the monogamous swallow. Nature 332: 640-642.

Partridge, L. 1980. Mate choice increases a component of offspring

fitness in fruit flies. Nature 283:290–291.

Petrie, M. 1994. Improved growth and survival of offspring of peacocks

with more elaborate trains. Nature 371:598–599.

Ritchie, M. G., M. Saarikettu, S. Livingstone, and A. Hoikkala. 2001.

Characterization of female preference functions for Drosophila

montana courtship song and a test of the temperature coupling

hypothesis. Evolution 55:721–727.

Ryan, M. J. 1990. Sexual selection, sensory systems, and sensory

exploitation. Oxf. Surv. Evol. Biol. 7:156–195.

Schaeffer, S. W., C. J. Brown, and W. W. Anderson. 1984. Does

mate choice affect fitness? Genetics 107:S94.

Welch, Allison, R. D. Semlitsch, and K. Carl Gerhardt. 1998.

Call duration as an indicator of genetic quality in male gray

tree frogs. Science 280: 1928-1930.

References


Image sources l.jpg
Image Sources

Calendars.com

www.calendars.com (accessed 2/2/06)

California State University, Sacramento

http://www.csus.edu/physics/ (accessed 2/2/06)

http://www.csus.edu/indiv/h/hollandb/ (accessed 2/2/06)

Genesee Scientific

https://www.geneseesci.com/ (accessed 2/2/06)

Google Images

http://images.google.com/images?q=fruit+flies,&hl=en&lr=&sa=N&tab=wi&sourceid=tipimg (accessed 2/2/06)

University College London

http://www.ucl.ac.uk/~ucbtcee/flies/Linda_Partridge.html (accessed 2/2/06)


Acknowledgments l.jpg

Acknowledgments


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