際際滷shows by User: neildazet / http://www.slideshare.net/images/logo.gif 際際滷shows by User: neildazet / Sat, 26 Nov 2011 09:43:13 GMT 際際滷Share feed for 際際滷shows by User: neildazet The predator deterrent effects of musk gland secretions from the common musk turtle (Sternotherus odoratus) on the cottonmouth (Agkistrodon piscivorus) /slideshow/the-predator-deterrent-effects-of-musk-gland-secretions-from-the-common-musk-turtle-sternotherus-odoratus-on-the-cottonmouth-agkistrodon-piscivorus/10341093 dazetbiologyidf2007-111126094315-phpapp02
note: the image on the 3rd slide did not upload correctly to slideshare and the arrows are not pointing to the correct locations. ABSTRACT: Prey organisms have evolved a variety of defense mechanisms that lessen the risk of being detected, attacked, or killed by a predator. Antipredator chemical defenses are utilized by a wide variety of taxa, most notably plants, insects, and amphibians. The odorous secretions from the common musk turtle (Sternotherus odoratus) have a presumed antipredator function, but experimental studies testing this hypothesis are lacking. This study tested the feeding deterrent effects of musk gland secretions from juvenile common musk turtles on a natural predator, the cottonmouth (Agkistrodon piscivorous). Neonate cottonmouths were presented with feeder minnows which either had distilled water or turtle musk applied to them. Variables measured included latency to feed and time of consumption. The latency to feed times for cottonmouths presented with distilled water minnows were not significantly different from those of cottonmouths presented with turtle musk minnows. The prey consumption times for cottonmouths feeding on turtle musk minnows were significantly greater than those of cottonmouths feeding on distilled water minnows. These results suggest that the musk secretions may lengthen the time of a predation sequence, allowing the turtle more time for a possible escape from the predator.]]>
note: the image on the 3rd slide did not upload correctly to slideshare and the arrows are not pointing to the correct locations. ABSTRACT: Prey organisms have evolved a variety of defense mechanisms that lessen the risk of being detected, attacked, or killed by a predator. Antipredator chemical defenses are utilized by a wide variety of taxa, most notably plants, insects, and amphibians. The odorous secretions from the common musk turtle (Sternotherus odoratus) have a presumed antipredator function, but experimental studies testing this hypothesis are lacking. This study tested the feeding deterrent effects of musk gland secretions from juvenile common musk turtles on a natural predator, the cottonmouth (Agkistrodon piscivorous). Neonate cottonmouths were presented with feeder minnows which either had distilled water or turtle musk applied to them. Variables measured included latency to feed and time of consumption. The latency to feed times for cottonmouths presented with distilled water minnows were not significantly different from those of cottonmouths presented with turtle musk minnows. The prey consumption times for cottonmouths feeding on turtle musk minnows were significantly greater than those of cottonmouths feeding on distilled water minnows. These results suggest that the musk secretions may lengthen the time of a predation sequence, allowing the turtle more time for a possible escape from the predator.]]> Sat, 26 Nov 2011 09:43:13 GMT /slideshow/the-predator-deterrent-effects-of-musk-gland-secretions-from-the-common-musk-turtle-sternotherus-odoratus-on-the-cottonmouth-agkistrodon-piscivorus/10341093 neildazet@slideshare.net(neildazet) The predator deterrent effects of musk gland secretions from the common musk turtle (Sternotherus odoratus) on the cottonmouth (Agkistrodon piscivorus) neildazet note: the image on the 3rd slide did not upload correctly to slideshare and the arrows are not pointing to the correct locations. ABSTRACT: Prey organisms have evolved a variety of defense mechanisms that lessen the risk of being detected, attacked, or killed by a predator. Antipredator chemical defenses are utilized by a wide variety of taxa, most notably plants, insects, and amphibians. The odorous secretions from the common musk turtle (Sternotherus odoratus) have a presumed antipredator function, but experimental studies testing this hypothesis are lacking. This study tested the feeding deterrent effects of musk gland secretions from juvenile common musk turtles on a natural predator, the cottonmouth (Agkistrodon piscivorous). Neonate cottonmouths were presented with feeder minnows which either had distilled water or turtle musk applied to them. Variables measured included latency to feed and time of consumption. The latency to feed times for cottonmouths presented with distilled water minnows were not significantly different from those of cottonmouths presented with turtle musk minnows. The prey consumption times for cottonmouths feeding on turtle musk minnows were significantly greater than those of cottonmouths feeding on distilled water minnows. These results suggest that the musk secretions may lengthen the time of a predation sequence, allowing the turtle more time for a possible escape from the predator. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/dazetbiologyidf2007-111126094315-phpapp02-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> note: the image on the 3rd slide did not upload correctly to slideshare and the arrows are not pointing to the correct locations. ABSTRACT: Prey organisms have evolved a variety of defense mechanisms that lessen the risk of being detected, attacked, or killed by a predator. Antipredator chemical defenses are utilized by a wide variety of taxa, most notably plants, insects, and amphibians. The odorous secretions from the common musk turtle (Sternotherus odoratus) have a presumed antipredator function, but experimental studies testing this hypothesis are lacking. This study tested the feeding deterrent effects of musk gland secretions from juvenile common musk turtles on a natural predator, the cottonmouth (Agkistrodon piscivorous). Neonate cottonmouths were presented with feeder minnows which either had distilled water or turtle musk applied to them. Variables measured included latency to feed and time of consumption. The latency to feed times for cottonmouths presented with distilled water minnows were not significantly different from those of cottonmouths presented with turtle musk minnows. The prey consumption times for cottonmouths feeding on turtle musk minnows were significantly greater than those of cottonmouths feeding on distilled water minnows. These results suggest that the musk secretions may lengthen the time of a predation sequence, allowing the turtle more time for a possible escape from the predator.
The predator deterrent effects of musk gland secretions from the common musk turtle (Sternotherus odoratus) on the cottonmouth (Agkistrodon piscivorus) from neildazet
]]> 1129 8 https://cdn.slidesharecdn.com/ss_thumbnails/dazetbiologyidf2007-111126094315-phpapp02-thumbnail.jpg?width=120&height=120&fit=bounds presentation White http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 Olfactory cues as a mechanism for road avoidance behavior in garter snakes, Thamnophis sirtalis, from high and low road density populations /slideshow/olfactory-cues-as-a-mechanism-for-road-avoidance-behavior-in-garter-snakes-thamnophis-sirtalis-from-high-and-low-road-density-populations/10340506 dazetmullichidf2007-111126091313-phpapp01
ABSTRACT: Roads have become a prevalent feature within many ecosystems and impose several negative ecological impacts on local flora and fauna. Reptiles experience high road mortality rates as they participate in seasonal movements. Several species of snakes demonstrate road avoidance behavior; however, the exact cues that elicit this behavior are unknown. The garter snake, Thamnophis sirtalis, due to its wide distribution, high road mortality rates, and occurrence in areas of high road densities provides an opportunity to address the role of olfactory cues in road avoidance behavior. This study evaluated differences in road avoidance behavior based on olfactory cues in high and low road density populations of garter snakes. Snakes from high and low road density areas were tested once in a 3-way choice apparatus with road sent, forest scent, and distilled water. When choice frequencies were grouped by road scent and non-road scent, results were not significantly different from random. When choice frequencies were grouped by scent and no scent, data were significantly different from random; snakes from high road density populations were attracted to familiar scents. Further studies are necessary to understand the choices behind road avoidance behavior, especially in species threatened by the ecological impacts of roads. ]]>
ABSTRACT: Roads have become a prevalent feature within many ecosystems and impose several negative ecological impacts on local flora and fauna. Reptiles experience high road mortality rates as they participate in seasonal movements. Several species of snakes demonstrate road avoidance behavior; however, the exact cues that elicit this behavior are unknown. The garter snake, Thamnophis sirtalis, due to its wide distribution, high road mortality rates, and occurrence in areas of high road densities provides an opportunity to address the role of olfactory cues in road avoidance behavior. This study evaluated differences in road avoidance behavior based on olfactory cues in high and low road density populations of garter snakes. Snakes from high and low road density areas were tested once in a 3-way choice apparatus with road sent, forest scent, and distilled water. When choice frequencies were grouped by road scent and non-road scent, results were not significantly different from random. When choice frequencies were grouped by scent and no scent, data were significantly different from random; snakes from high road density populations were attracted to familiar scents. Further studies are necessary to understand the choices behind road avoidance behavior, especially in species threatened by the ecological impacts of roads. ]]> Sat, 26 Nov 2011 09:13:11 GMT /slideshow/olfactory-cues-as-a-mechanism-for-road-avoidance-behavior-in-garter-snakes-thamnophis-sirtalis-from-high-and-low-road-density-populations/10340506 neildazet@slideshare.net(neildazet) Olfactory cues as a mechanism for road avoidance behavior in garter snakes, Thamnophis sirtalis, from high and low road density populations neildazet ABSTRACT: Roads have become a prevalent feature within many ecosystems and impose several negative ecological impacts on local flora and fauna. Reptiles experience high road mortality rates as they participate in seasonal movements. Several species of snakes demonstrate road avoidance behavior; however, the exact cues that elicit this behavior are unknown. The garter snake, Thamnophis sirtalis, due to its wide distribution, high road mortality rates, and occurrence in areas of high road densities provides an opportunity to address the role of olfactory cues in road avoidance behavior. This study evaluated differences in road avoidance behavior based on olfactory cues in high and low road density populations of garter snakes. Snakes from high and low road density areas were tested once in a 3-way choice apparatus with road sent, forest scent, and distilled water. When choice frequencies were grouped by road scent and non-road scent, results were not significantly different from random. When choice frequencies were grouped by scent and no scent, data were significantly different from random; snakes from high road density populations were attracted to familiar scents. Further studies are necessary to understand the choices behind road avoidance behavior, especially in species threatened by the ecological impacts of roads. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/dazetmullichidf2007-111126091313-phpapp01-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> ABSTRACT: Roads have become a prevalent feature within many ecosystems and impose several negative ecological impacts on local flora and fauna. Reptiles experience high road mortality rates as they participate in seasonal movements. Several species of snakes demonstrate road avoidance behavior; however, the exact cues that elicit this behavior are unknown. The garter snake, Thamnophis sirtalis, due to its wide distribution, high road mortality rates, and occurrence in areas of high road densities provides an opportunity to address the role of olfactory cues in road avoidance behavior. This study evaluated differences in road avoidance behavior based on olfactory cues in high and low road density populations of garter snakes. Snakes from high and low road density areas were tested once in a 3-way choice apparatus with road sent, forest scent, and distilled water. When choice frequencies were grouped by road scent and non-road scent, results were not significantly different from random. When choice frequencies were grouped by scent and no scent, data were significantly different from random; snakes from high road density populations were attracted to familiar scents. Further studies are necessary to understand the choices behind road avoidance behavior, especially in species threatened by the ecological impacts of roads.
Olfactory cues as a mechanism for road avoidance behavior in garter snakes, Thamnophis sirtalis, from high and low road density populations from neildazet
]]> 283 4 https://cdn.slidesharecdn.com/ss_thumbnails/dazetmullichidf2007-111126091313-phpapp01-thumbnail.jpg?width=120&height=120&fit=bounds presentation Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 https://public.slidesharecdn.com/v2/images/profile-picture.png https://cdn.slidesharecdn.com/ss_thumbnails/dazetbiologyidf2007-111126094315-phpapp02-thumbnail.jpg?width=320&height=320&fit=bounds slideshow/the-predator-deterrent-effects-of-musk-gland-secretions-from-the-common-musk-turtle-sternotherus-odoratus-on-the-cottonmouth-agkistrodon-piscivorus/10341093 The predator deterrent... https://cdn.slidesharecdn.com/ss_thumbnails/dazetmullichidf2007-111126091313-phpapp01-thumbnail.jpg?width=320&height=320&fit=bounds slideshow/olfactory-cues-as-a-mechanism-for-road-avoidance-behavior-in-garter-snakes-thamnophis-sirtalis-from-high-and-low-road-density-populations/10340506 Olfactory cues as a me...