Frogs of the United States and Canada, 2-vol. set

Abbreviations

mya million years ago NALMA North American Land Mammal Age nDNA nuclear DNA ng nanogram (one billionth of a gram) nm nanometer PCBs polychlorinated biphenyls PCi g picogram (one trillionth of a gram) PCR polymerase chain reaction pH a measure of hydrogen ion concentration and hence, acidity PO2 partial pressure of oxygen ppb parts per billion ppm parts per million ppt parts per thousand sec second, seconds SUL snout-urostyle length Tb body temperature THz terahertz, a measure of extremely high frequency light waves TL total length TL50 lethal concentration at which 50% of the test animals die μg/L micrograms per liter UVB ultraviolet light in the beta (10–400 nm) wavelengths; these short, high frequency wavelengths are invisible to humans yr, yrs year, years Ƃ female ƃ male ‰ parts per thousand AT air temperature BP before present ca. approximately cm centimeter cps cycles per seconds CTmax maximum critical temperature CTmin minimum critical temperature DOC dissolved oxygen content DOR dead on road F1 first filial generation g grams ha hectares (= 2.2 acres) hr, hrs hour, hours Hz hertz (a measure of sound frequency) J joules (a measure of light intensity) kHz kilohertz (a measure of sound frequency) km kilometers (0.6 miles) LC50 lethal concentration at which 50% of the test animals die m meter, meters m2 square meters mg/L milligrams per liter mhos a unit of measurement equal to 1 ampere per volt (a measure of conductivity) ml/L milliliters per liter mm millimeter, millimeters ms milliseconds mtDNA mitochondrial DNA my million years Abbreviations This page intentionally left blank ...