| Abstract: | Apparent worldwide declines in amphibian populations (Pechmann and Wake 1997) have stimulated interest in amphibians as bioindicators of the health of ecosystems. Because we have little information on the population status of many species, there is interest by public and private land management agencies in monitoring amphibian populations. Amphibian egg and larval surveys are established methods of surveying pond-breeding amphibians. Adults may be widely dispersed across the landscape, but eggs and larvae are confined to the breeding site during a specific season of the year. Also, observations of late-stage larvae or metamorphs are evidence of successful reproduction, which is an important indicator of the viability of the population. The goal of this guide is to help students, natural resources personnel, and biologists identify eggs and larval stages of amphibians in the field without the aid of a microscope. |
| Genre: | Federal Government Series |
| ProdID: | 2001205 |
| Citation Author: | Parmelee,J. R.; Knutson,M. G.; Lyon,J. E. |
| Citation Contributing Office: | Upper Midwest Environmental Sciences Center |
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| Citation Language: | English |
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| Citation Publisher: | U.S. Fish and Wildlife Service |
| Citation Series: | Information and Technology Report |
| Citation Series Code: | Information and Tech |
| Citation Series Number: | USGS/BRD/ITR-2002-0004 |
| Citation Search Results Text: | A field guide to amphibian larvae and eggs of Minnesota, Wisconsin, and Iowa; 2002; Federal Government Series; Information and Tech; USGS/BRD/ITR-2002-0004; Parmelee,J. R.; Knutson,M. G.; Lyon,J. E. |
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| Citation Year: | 2002 |
| Type: | citation/reference |
| Text: | A field guide to amphibian larvae and eggs of Minnesota, Wisconsin, and Iowa; 2002; Federal Government Series; Information and Tech; USGS/BRD/ITR-2002-0004; Parmelee,J. R.; Knutson,M. G.; Lyon,J. E. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (INDEX PAGE): | http://www.umesc.usgs.gov/terrestrial/amphibians/mknutson_5003869_field_guide.html |
| Date Other: | Tue, 1 Jan 2002 00:00 -0600 |
| Publisher: | U.S. Fish and Wildlife Service |
