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Evaluation Of A Pelleted Bait Containing Methyl Anthranilate As A Bird Repellent, J. Russell Mason, Larry Clark, Timothy Miller
Evaluation Of A Pelleted Bait Containing Methyl Anthranilate As A Bird Repellent, J. Russell Mason, Larry Clark, Timothy Miller
Larry Clark
No-till agriculture involves the use of granular pesticide formulations, chemically treated seeds, and pelleted baits. Some of these may accidentally kill birds. We have tested whether methyl anthranilate (MA), a known bird repellent, would eliminate consumption of a pelleted bait. In two laboratory experiments and an outdoor aviary trial, cowbirds (Molothrus ater Bodd.) were presented with pellets containing pesticide and MA, pellets containing pesticide but no MA, and carrier pellets without pesticide or MA. Consumption of any formulation was low, but the addition of MA significantly decreased bait loss in the laboratory, and prevented the disappearance of bait in the …
Interaction Between Sensory And Postingestional Repellents In Starlings: Methyl Anthranilate And Sucrose, Larry Clark, J. Russell Mason
Interaction Between Sensory And Postingestional Repellents In Starlings: Methyl Anthranilate And Sucrose, Larry Clark, J. Russell Mason
Larry Clark
Ingestion of concentrated sucrose solutions causes sickness in sucrase-defi cie_nt birds. As a result, some suggest that sucrose may represent an environmentally safe avian repellent. In the present experiments, we compared the repellency of sucrose to that of methyl anthranilate (MA), a known avian repellent. We also tested mixtures of sucrose and MA to investigate whether repellency could be enhanced, relative to sucrose or MA presentealo'!e. The results showed that the MA was strongly avoided in both drinking anf edmtnals. Conversely, only high sucrose concentrations were avoided, and only in dnnkmg tnals. No combination of MA and sucrose was as …
Odor Thresholds In Passerines, Larry Clark, K.V. Avilova, N.J. Bean
Odor Thresholds In Passerines, Larry Clark, K.V. Avilova, N.J. Bean
Larry Clark
Eight species of passerines were evaluated for their ability to form conditioned responses to odor stimuli. Only 5 species met training criteria and were tested for odor detection thresholds.
2. Detection thresholds were comparable to other passerines tested. Detection values were also similar to mammalian macrosmatic species, such as rats and rabbits. Thus, despite the poorly elaborated olfactory anatomy of passerines, these birds possess an adequate sense of smell.
3. Within the Passeriformes there is no correlation between olfactory acuity and relative size of the olfactory bulb. However, there is a correlation between acuity and olfactory bulb size across orders …