Effects of polychlorinated biphenyl 126 on green frog (Rana clamitans) and leopard frog (Rana pipiens) hatching success, development, and metamorphosis

1999 ◽  
Vol 18 (11) ◽  
pp. 2478-2486 ◽  
Author(s):  
Michele Laura Rosenshield ◽  
Mariana Beatriz Jofré ◽  
William Henry Karasov
Keyword(s):  
Rana Pipiens ◽  
Hatching Success ◽  
Polychlorinated Biphenyl ◽  
Leopard Frog ◽  
Rana Clamitans ◽  
Green Frog

Helminth communities in bullfrogs (Rana catesbeiana), green frogs (Rana clamitans), and leopard frogs (Rana pipiens) from New Brunswick, Canada

1997 ◽  
Vol 75 (11) ◽  
pp. 1883-1890 ◽  
Author(s):  
Donald F. McAlpine
Keyword(s):  
New Brunswick ◽  
Sexual Size Dimorphism ◽  
Rana Pipiens ◽  
Rana Catesbeiana ◽  
Skin Penetration ◽  
Life Cycles ◽  
Leopard Frog ◽  
Green Frog ◽  
Leopard Frogs ◽  
Helminth Communities

Twenty-three helminth species were identified from bullfrogs, Rana catesbeiana, green frogs, R. clamitans, and leopard frogs, R. pipiens, in New Brunswick. Digeneans dominated adult helminth communities in the aquatic bullfrog and semi-aquatic green frog; nematodes were dominant in the more terrestrial leopard frog. In green frogs and leopard frogs, richness and abundance were greatest in adults; in bullfrogs, juveniles showed the greatest richness and abundance. An increase in vertebrates in the diet of adult bullfrogs influences helminth communities in bullfrogs. Where Glypthelmins quieta and nematodes, which infect the host by skin penetration, predominate in green frogs and leopard frogs, respectively, the increase in epidermal area with age probably influences helminth abundance. Adult female leopard frogs are larger than males and harbour greater numbers of helminths. Within the most heavily sampled component communities only larval digeneans, and less frequently nematodes with direct life cycles, were common (i.e., in > 50% of hosts); other taxa were generally present at prevalences of < 20% and intensities of < 10 helminths per frog. Although wetland characteristics and helminth transmission dynamics play a role in producing variation in helminth communities among sites, ontogenetic shifts in diet and sexual size dimorphism within these anuran species are important in shaping helminth communities in individual frog hosts.

Hopping and swimming in the leopard frog,Rana pipiens: I. Step cycles and kinematics

1996 ◽  
Vol 230 (1) ◽  
pp. 1-16 ◽  
Author(s):  
Susan E. Peters ◽  
Lynn T. Kamel ◽  
David P. Bashor
Keyword(s):  
Rana Pipiens ◽  
Leopard Frog
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