Northern leopard frog reintroduction : Raven River - year 2 (2000) /

Abstract

SRD) for their enthusiasm, assistance and support through the 2000/2001 field season. Their efforts and assistance truly enhanced this project. I would also like to extend a sincere thank-you to the following individuals for their muchappreciated contribution of volunteer time and dedication to the reintroduction project:

Magrath northern leopard frog reintroduction project : final report /

“…Egg mass hatching times and tadpole development rates vary with water temperature (Russell andBauer 1993, cited in Wagner 1997). Previous studies have shown that under cooler temperatures, hatching times are extended and tadpole development rates are reduced (Kendell 2001). The difference in hatching times and tadpole development rates between years in this project supported this.…”

“…After 1 5 to 25 minutes the egg masses were transferred from the transport container into predatorproof exclosure nets, which had been previously anchored in water of a depth varying from 0.6 to 1.5 metres. The predator exclosure nets were constructed according to a design described by Kendell (2001), and they served to contain the egg masses and tadpoles and to protect them from fish and avian predators.…”

“…In 1998 the Alberta Fish and Wildlife Division initiated a northern leopard frog reintroduction program, and in 1999 the first pilot reintroduction project was started at the Raven Brood Trout Station near Caroline, Alberta (Kendell 2001). The goal of that project was to re-establish leopard frogs in historically occupied habitats of the upper Red Deer and North Saskatchewan River drainage basins.…”

Magrath northern leopard frog reintroduction project - year 1 progress report /

“…Frogs were last observed above water on 24 October. Five of them were spotted east of the spillgate in two locations along the west side Kendell 2001). Because the release site was so large it was not feasible to carry out any type of intensive post-release monitoring, such as a total census of young-of-theyear frogs emerging from the pond.…”

“…The GPS locations were recorded along with the water temperatures. The aquatic predator exclosures were constructed according to designs provided by Kris Kendell (see Kendell 2001) and used to contain and protect the egg masses and tadpoles during the rearing process (Appendix B/Photo 1).…”