Summary of published accounts of plasma cryoprotectant concentration during freezing in adult gray treefrogs, Hyla versicolor and H. chrysoscelis
| Population . | [Glucose] (mmol 1−1) . | [Glycerol] (mmol 1−1) . | Rearing/collection conditions . | Reference . |
|---|---|---|---|---|
| Hyla versicolor | ||||
| Hancock Co., IL | 20.1 | 67.1 | Lab reared | Layne, 1999 |
| Hancock Co., IL | 21.8 | 112.5 | Lab reared | Layne and Jones, 2001 |
| Fayette Co., IN | 22.7 | <10 | Lab reared | Layne and Lee, 1989 |
| Hennepin Co., MN | Nil | ∼300 * | Lab reared | Schmid, 1982 |
| Ontario | 6.8 | 423 | Lab reared | Storey and Storey, 1985 |
| Ontario | 8.3 | 19.3 | Spring collected | Storey and Storey, 1987 |
| Hyla chrysoscelis | ||||
| Butler Co., OH | 24.9 | <0.1 | Lab reared | Costanzo et al., 1992 |
| Minnesota | No mention | Yes * | Fall collected | Schmid, 1986 |
| Population . | [Glucose] (mmol 1−1) . | [Glycerol] (mmol 1−1) . | Rearing/collection conditions . | Reference . |
|---|---|---|---|---|
| Hyla versicolor | ||||
| Hancock Co., IL | 20.1 | 67.1 | Lab reared | Layne, 1999 |
| Hancock Co., IL | 21.8 | 112.5 | Lab reared | Layne and Jones, 2001 |
| Fayette Co., IN | 22.7 | <10 | Lab reared | Layne and Lee, 1989 |
| Hennepin Co., MN | Nil | ∼300 * | Lab reared | Schmid, 1982 |
| Ontario | 6.8 | 423 | Lab reared | Storey and Storey, 1985 |
| Ontario | 8.3 | 19.3 | Spring collected | Storey and Storey, 1987 |
| Hyla chrysoscelis | ||||
| Butler Co., OH | 24.9 | <0.1 | Lab reared | Costanzo et al., 1992 |
| Minnesota | No mention | Yes * | Fall collected | Schmid, 1986 |
Measured in muscle extracts and bladder urine. Plasma concentration reported in all other cases.