Microscopy Primer
Light and Color
Microscope Basics
Special Techniques
Digital Imaging
Confocal Microscopy
Live-Cell Imaging
Photomicrography
Microscopy Museum
Virtual Microscopy
Fluorescence
Web Resources
License Info
Image Use
Custom Photos
Partners
Site Info
Contact Us
Publications
Home

The Galleries:

Photo Gallery
Silicon Zoo
Pharmaceuticals
Chip Shots
Phytochemicals
DNA Gallery
Microscapes
Vitamins
Amino Acids
Birthstones
Religion Collection
Pesticides
BeerShots
Cocktail Collection
Screen Savers
Win Wallpaper
Mac Wallpaper
Movie Gallery

Differential Interference Contrast Image Gallery

Frog Testes (Meiosis)

Frogs live in almost every environment on Earth and breed in a wide variety of areas. Though the annual event usually takes place in still or slow-moving bodies of freshwater, numerous species have adapted to reproduce in alternative locations.

Typically, male frogs desiring to breed use mating calls to attract females, who are able to differentiate their own species based on the sound and location of the call. When a potential mate arrives, the male clasps her from behind in a copulatory embrace known as an amplexus. Sperm is ejected onto the eggs as they are released by the female. The eggs, which vary in number depending on species, then float or sink in the tranquil water until they eventually hatch into tadpoles.

Certain adaptations have enabled some frog species to carry out reproduction in a slightly different manner. For instance, some frogs breed in rapidly flowing waters because their enlarged testes produce extra amounts of sperm that help ensure fertilization. Others, such as several South American species, build basin-like nests in the mud for breeding. Perhaps the most unusual reproductive deviation, however, is the habit of some Oriental frog species of depositing fertilized eggs on land, where they hatch into froglets, instead of tadpoles.

BACK TO THE DIC IMAGE GALLERY

Questions or comments? Send us an email.
© 1998-2013 by Michael W. Davidson and The Florida State University. All Rights Reserved. No images, graphics, scripts, or applets may be reproduced or used in any manner without permission from the copyright holders. Use of this website means you agree to all of the Legal Terms and Conditions set forth by the owners.
This website is maintained by our
Graphics & Web Programming Team
in collaboration with Optical Microscopy at the
National High Magnetic Field Laboratory.
Last modification: Friday, Aug 01, 2003 at 11:43 AM
Access Count Since April 22, 2003: 19738
For more information on microscope manufacturers,
use the buttons below to navigate to their websites: