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Amphibian Survey


Goal:

To quantitatively sample wetlands in the Cleveland Metroparks to assess the abundance of amphibians and some invertebrates.

Methods:

We will have a group of people conducting dipnet sampling for a specific timed period, and a single person recording data. The dipnet samplers will call out what they capture in their nets, and the recorder will write down the data. The dipnet samplers will also collect up to 30 individuals of each species of amphibian and certain insects. The data recorder will tell us once the limit of 30 individuals for each category is reached. In some cases, it is hard to identify species by eye in the field, and we will use larger taxonomic groups. The groups we will use:

Amphibians

    1) Wood Frog Larvae

    2) Leopard/Pickerel Frog Larvae

    3) Bull Frog Larvae

    4) Green Frog Larvae

    5) Hylidae (i.e., treefrog, peeper and chorus frog) Larvae (when viewed from the top, eyes are lateral)

    6) Ambystoma Larvae

    7) Toad Larvae

    8) Adult Newt (these will be recorded, but released instead of preserved)

Insects:

    1) Aeshnid Dragonflys

    2) Libellulid Dragonflys

    3) Dytiscus (predaceous diving beetle) larvae

    4) Dytiscus (predaceous diving beetle) adult

    5) Hydrophillid (water scavenger beetle) larvae

    6) Hydrophillid (water scavenger beetle) adult

    7) Belostomatidae (‘Water Bugs’)

Other:

    1) Fish – this is for any type of fish; we do not expect to find fish in most of the ponds we sample.

USGS tadpole field key

http://www.umesc.usgs.gov/terrestrial/amphibians/field_guide/figure4.html