Friends  of  the  Cawthra  Bush


Greater  Mississauga  Area

• Home Page • Table of Contents • News Flashes • Chronology •

YouTube  site
where my videos are posted

Pages  of  Special  Interest;

• Defense Fund for Donald Barber •

• Flowers with Wings are Butterflies • Photo Gallery • Sound Chip Gallery •

• End of Suburbia & Continuous Communities as the Solution - JOBS for LIFE • The Culham Brief •

Other  Table  of  Contents;
• Events • Animals & their Welfare Issues in Mississauga •
• Biological Issues - Academic Letters - Documentation Table of Contents •
• Geological & Hydrological Issues • Historical & Heritage aspects of the Cawthra Bush and Estate •
• News Letters & Literature • Air Pollution in Mississauga • Political Methods & Issues •
• Ratepayers Groups in Mississauga • Persons of Interest & Political Players •
• Media - News Articles & Letters to • Freedom of Information Results & Issues •

( the details about them )

Letters about Cawthra Bush wildlife;

The May 6/99 letter from Prof. D. Dudley Williams, Ph.D., D.Sc., Professor of Zoology (Fairy Shrimp).

Ed Hendrycks, Research Assistant, Research Division, Canadian Museum of Nature.  Supplies some general back ground on Fairy shrimp.  His expertise is in Amphipods.

Fairy shrimps belong in the order Anostraca, which means "no carapace", as they lack a carapace.  They have large, stalked eyes.  They are often sold in pet stores as instant shrimp or sea monkeys.  The eggs are amazingly resistant and can withstand dessication for long periods of time.  The brine shrimp Artemia salina  is often sold as eggs, which when immersed in salt water of the right concentration, hatch into nauplius larvae which can tolerate salinities from fresh water to saturated brine.  This is the only species that is found in saline lakes, as this group is strictly found in  freshwater.  They feed on microscopic algae, diatoms, protozoans, rotifers, bacteria and detritus which they gather as they swim in an inverted position. However, they have been seen gnawing on larger particles like dead tadpoles, earthworms, mollusks and frog eggs.

The feathery legs are rhythmically waved anteriorly to posteriorly and propel the animal forward, while the leg bases filter out and manipulate the algae.  The 11 pairs of swimming legs are flattened and leaflike in appearance, hence the name "phyllopods" and "gill feet".  The male has large structures called claspers, which are modified 2nd antennae, to hold onto the female prior to mating.  They swim in pairs until the female moults, then the eggs are released and the male can fertilize them.  The males usually die a few hours after copulation.  The eggs are held by the female for some time and then drop to the bottom and may remain dormant for a year as the temporary ponds or vernal ponds dry up each year.  These small bodies of water are usually full of water in the spring and dry up as conditions get warmer and drier in the summer.

E. bundyi  apparently prefers clear ponds and pools, while other species can be found in muddy waters. Eubranchipus  spp. are all restricted to North America.  Since these animals are basically defenseless, they are not found in lakes as fish would decimate there numbers quite quickly.  This is one reason why they can reach high densities in vernal ponds, ditches and prairie pools as these temporary bodies of water usually do not have large predators which would feed on fairy shrimps.  Some of the fairy shrimps can reach 25 mm long. They are fascinating to watch in an aquarium and are easy to maintain.

It will make a difference!
  Home page   -  Main Table of  Contents   -  Back to Top

 Web-sites to visit for both Fairy Shrimp and vernal ponds (mostly from the States);

Fairy Shrimp (general);

Vernal ponds (general);  or as they call it the "Wicked Big Pond"

For more.

Your Financial Donations are Greatly Appreciated
and Very Much Needed to
Ensure the Survival of the
Friends of the Cawthra Bush

Now Accepting Pay Pal
Donations to aid my efforts in every way.

• Home Page • Table of Contents • News Flashes • Chronology •

Back to Top

About this Web-site & Contact Information • Petition • Contributions