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| | [No title] |
 | | Chemicals that produced mortality when applied dermally at doses of 40 mg kg(-1) were rotenone, nicotine, propoxur, natural pyrethrins, allethrin, and resmethrin; those that gave no mortality were permethrin, fenvalerate, phenothrin, tetramethrin, piperonyl butoxide, and diphacinone. |
 | | Piperonyl butoxide enhanced the oral toxicity of allethrin and resmethrin and the dermal activity of resmethrin; it did not enhance the activity of natural pyrethrins either orally or dermally. |
 | | The changes in aquatic (V) over dot O-2, P-c, surfacing behavior, and survivorship when forcibly submerged, all suggest that stage XXII is a critical developmental stage during which bullfrog tadpoles switch from a primarily aquatic to a primarily terrestrial mode of existence. |
| www.herplit.com /herplit/download/1998.txt (7141 words) |
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