Open Access. Powered by Scholars. Published by Universities.®
Journal of the Iowa Academy of Science: JIAS
Age; demography; population biology; fecundity; ovum size; Riina areolata
Articles 1 - 1 of 1
Full-Text Articles in Education
Demographic And Reproductive Characteristics Of A Southern Illinois Population Of The Crayfish Frog, Rana Areolata, Michael Redmer
Demographic And Reproductive Characteristics Of A Southern Illinois Population Of The Crayfish Frog, Rana Areolata, Michael Redmer
Journal of the Iowa Academy of Science: JIAS
Demographic (snout-vent length, skeletochronologically estimated age) and reproductive (fecundity, ova size) characteristics were examined in Riina areolata from Williamson County, Illinois. Fifty-nine frogs (36 males, 23 females) were sampled from breeding choruses in March 1996. Hematoxylinophilic annular lines of arrested growth (LAG) were detected in the diaphyses of cross-sectioned phalanges of all sampled frogs. t-tests revealed that male age (mean = 3.53 yr) and female age (mean = 3.83 yr) were not significantly different, but male SVL (mean = 82.78 mm) was significantly smaller than that of females (mean = 89.61 mm). There were positive correlations between SVL and age …