-20- 



Obreshkove, Vasil. 1921. The photic reactions of tadpoles in relation to the 

 Bunsen-Roscoe law. Jour. Exp. Zool. 34:235-279. 



Orton, Grace L. 1951 (see XXIV. Distribution - Missouri) . 



Seale, Dianne B. 1980. Influence of amphibian larvae on primary production, 



nutrient flux, and competition in a pond ecosystem. Ecology 61:1531-1550. 



Steinwascher , K. 1979. Competitive interactions among tadpoles: responses to 

 resource level. Ecology 60:1172-1183. 



Steinwascher, K. 1981. Threshold feeding concentrations of tadpoles: a response 

 to Seale and Beckvar. Copeia 1981 (4) :921-922. 



Walters, Bonnie. 197 5. Studies of interspecific predation within an amphibian 

 community. J. Herpetology 9:267-279. 



Wilbur, H.M. and J. P. Collins. 197 3. Ecological aspects of amphibian metamor- 

 phosis. Science 182:1305-1314. 



(See also XVI. Growth Rates.) 



XV. Hybridization and Genetics 



Bachmann, K. and M. Nishioka. 1978. Genome size and nuclear size in palearctic 

 frogs (Rana) . Copeia 1978 (2) : 225-229. 



Becak, M.L., W. Becak, F.L. Roberts, R.N. Shoffner, and E.P. Volpe. 1971. 

 Chromosome atlas: fish, amphibians, reptiles, and birds. Vol. 1 & 2. 

 Springer-Verlag. Berlin, Heidelberg and New York. 208 p. 



Berven, K.A. 1982 (see X. Ecology). 



Committee on Standards. 1974 (see XXIV. Miscellaneous). 



Elinson, R.P. 1973. Fertilization of frog body cavity eggs: Ran a pipiens eggs 

 and Rana clamitans sperm. Biol. Reprod. 8:362-368. 



Elinson, R.P. 1974. A block to cross-fertilization located in the egg jelly of 

 the frog Rana clamitans . J. Embryol. Exp. Morph. 32:325-335. 



Elinson, R.P. 1975a. Viable amphibian hybrids produced by circumventing a block 

 to cross-fertilization ( Rana clamitans ^ X Rana catesbeiana <? ) . J. Exp. 

 Zool. 192:323-329. 



Elinson, R.P. 1975b'." Fertilization of green frog (Rana clamitans ) eggs in their 



native jelly by bullfrog ( Rana catesbeiana ) sperm. J. Exp. Zool. 193:419-423. 



Elinson, R.P. 1975c. Isozymes and morphology of five amphibian hybrid embryo 



combinations which develop beyond gastrulation, Canadian J. Zool. 53:993-1003. 



Elinson, R.P. 1977. Amphibian hybrids: A genetic approach to the analysis of 



their developmental arrest. Differentiation 9:3-9. 

 Elinson, R.P. 1981. (see XIII. Development and Metamorphosis) 



Elinson', R.P. 1981. Have you seen a bullfrog-green frog hybrid? Herpetol. Rev. 12(4) 

 Elinson, R.P. and A. Briedis. 1981. Triploidy permits survival of an inviable 

 amphibian hybrid. Devel. Genetics 2:357-367. 



