Tolerance to high temperature and salinity by tadpoles of the Philippine frog, Rana cancrivora

Journal Article · Wed May 25 00:00:00 EDT 1977 · Copeia; (United States)

DOI:https://doi.org/10.2307/1443921· OSTI ID:7254561

Dunson, W A

Amphibians as a group are considered rather intolerant of temperatures above 38C. Tadpoles were found in Philippine tidal pools which were as hot as 42C near midday. This represents an increase of about 3C over the previously recorded high temperature for tadpole survival. Groups of tadpoles were collected and acclimated at 22 to 25C and 35C for 5 to 21 days. Survival time was measured at 40 to 45C at 20% sea water. Tadpoles acclimated at 35C survived much longer. At 42C survival was greater than 40 h. A further test of tadpole survival in dilutions of seawater was made at 25C. Tadpoles were placed 5 days each at 0, 20, 40, 60, 80 and 100% sea water. The percentage dead at end of 5 day period was 0, 0, 0, 5, 33, and 100%. The survival was more than 50% up through 80% sea water. (MU)

• Research Organization: Pennsylvania State Univ., University Park
• OSTI ID: 7254561
• Journal Information: Copeia; (United States), Vol. 2
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
FROGS
TEMPERATURE EFFECTS
MEDIUM TEMPERATURE
BIOLOGICAL EFFECTS
SALINITY
AMPHIBIANS
BIOLOGICAL ADAPTATION
LARVAE
MORTALITY
PHILIPPINES
PONDS
SEAWATER
SURVIVAL TIME
TIDE
TOLERANCE
ANIMALS
AQUATIC ORGANISMS
ASIA
HYDROGEN COMPOUNDS
OXYGEN COMPOUNDS
VERTEBRATES
WATER
560205* - Thermal Effects- Vertebrates- (-1987)