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Showing 1 to 20 of 81 for “"Ambystoma"”.
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Predation of Ringed Salamander Larvae, Ambystoma Annulatum
Predation on larval Ambystoma annulatum was studied in 1991-1993. The following predators, which are normally present in the breeding ponds of A. annulatum during larval development, were studied : dragonfly nymphs (Anax and Tramea), waterbugs (Belostoma), backswimmers (Notonecta), and newts …
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Food Habits of Larval Ringed Salamanders, Ambystoma Annulatum
Larval Ambystoma annulatum were collected from two ponds in Stone County, Missouri during 1989-1990 for a food habits study. Larvae fed on a variety of organisms. The major food items consisted of microcrustaceans, nematodes, and dipteran larvae. The diet changed both with development and season. …
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Size Structure and Intraguild Interactions between Two Ambystoma Species
… pond ecosystems between marbled salamanders (<em>Ambystoma opacum</em>) and tiger salamanders (<em>Ambystoma tigrinum</em>) using an outdoor mesocosm experiment. I hypothesized that 1) <em>A. opacum</em> survivorship and growth would be negatively impacted when both species start at a similar size …
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Annual variation in timing, orientation and effects of weather on Jefferson salamander (Ambystoma jeffersonianum) and spotted salamander (Ambystoma maculatum) movements in central Kentucky
… successfully reproduced. Jefferson salamanders (Ambystoma jeffersonianum) and spotted salamanders (A. maculatum) were abundant and successful breeders and were the focus of this study. Breeding times between the two years varied for both species. Weather associations with prebreeding and …
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Control of heart development in the Mexican axolotl (Ambystoma mexicanum).
… is the cardiac-lethal (c) mutant in the axolotl (Ambystoma mexicanum). Embryos homozygous for the c gene develop hearts which never begin to beat, become severely deformed due to the lack of circulation, and die shortly after hatching. The mutation was believed to affect the tissue responsible for …
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Stealing, scavenging, or storing? Breeding behaviors of unisexual Ambystoma salamanders
<p>The unisexual <em>Ambystoma</em> salamander complex is a lineage of all-female salamanders that use a unique form of reproduction: kleptogenesis. Kleptogenesis requires sperm from male salamanders of co-occurring sexual species, potentially putting unisexual and sexual females in breeding …
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Migration phenology and fertility of imperiled Illinois salamander (Ambystoma) species
Made available in DSpace on 2022-01-12T21:46:56Z (GMT). No. of bitstreams: 2 CALLAHAN-THESIS-2021.pdf: 2826996 bytes, checksum: 5cc241706b5a8e00e8dc8731cde47fc3 (MD5) LICENSE.txt: 4210 bytes, checksum: 284778725358f3904105b35f49d32554 (MD5) Previous issue date: 2021-07-21
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Functional Organization of the Tectum of the Tiger Salamander (Ambystoma Tigrinum)
Made available in DSpace on 2015-05-12T21:44:52Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7013330.PDF: 4945393 bytes, checksum: e96276ef324b1ef7b9814e8c0dfd1999 (MD5) Previous issue date: 1969
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Temporal changes in unisexual and sexual Ambystoma salamander populations in southeast Michigan
… population structure. Unisexual (all female) <em>Ambystoma</em> salamanders reproduce via kleptogenesis, resulting in ploidy-variable offspring. I analyzed genetic data of historic and modern-day unisexual and <em>A. laterale</em> samples from the University of Michigan’s E. S. George Reserve …
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Survivorship of ploidy-variable unisexual <i>ambystoma</i> aalamanders across developmental stages
<p>Unisexual <em>Ambystoma</em> produce ploidy-variable offspring that differ in survivorship to adulthood. These populations reproduce through kleptogenesis, persisting by stealing genetic material from males of compatible bisexual <em>Ambystoma</em> species (e.g., Jefferson's Salamander <em>A. …
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Hearing Sensitivity and the Effect of Sound Exposure on the Axolotl (Ambystoma Mexicanum)
<p>The axolotl (Ambystoma mexicanum) has been used as a model organism for studying development, genetics, and regeneration. Although the sensory hair cells of the lateral line of this species have been shown to be able to regenerate, it is not known whether this also occurs in the inner ear. In …
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Landscape Genetics of the Marbled Salamander (Ambystoma Opacum) at Mammoth Cave National Park
… landscape genetics study on marbled salamanders (Ambystoma opacum) in highly connected forested habitat at Mammoth Cave National Park. This investigation of gene flow among ponds within a mostly continuous landscape provides data that can be compared with patterns observed in more fragmented …
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Biotic and abiotic influences on aggressive interactions within larval <i> Ambystoma</i> assemblages
… two species of intraguild (IG) predators, <i>Ambystoma opacum</i> and <i>A. tigrinum</i>, and their shared intraguild prey, <i>A. maculatum</i>. All species exhibited similar ontogenetic patterns of aggression, characterized by peaks of aggression early in development and subsequent gradual …
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Studying the Patterning Mechanisms and Cell Fates during Limb Regeneration in Ambystoma mexicanum
We studied patterning mechanisms and cell fates during limb regeneration in the axolotl. 1) It is crucial to understand the earliest events of patterning. Since it is technically challenging to study early events, we established single cell PCR. This new tool will allow us to obtain novel insight …
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Learning of Dietary Cues By Embryos and Larvae of Ringed Salamanders (Ambystoma Annulatum)
… the hypothesis that larval ringed salamanders (Ambystoma annulatum) exposed to a novel food scent as embryos will exhibit a preference for the scent post-hatching. Embryos were exposed to brine shrimp or a water control. After hatching, behavior of larvae was quantified following exposure to …
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A Skeletochronological Study to Determine the Age of the Ringed Salamander (Ambystoma Annulatum)
… 202 sexually mature ringed salamanders (Ambystoma Annulatum) were caught in a semi-permanent pond by using pit-fall traps and drift fence. The sex ratio strongly deviated from a 1:1 ration and approached 3:1 in favor of males. The average snout-vent lengths were significantly higher …
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Ecosystem Functional Consequences Of Body Size Variation In An Apex Predator (Ambystoma jeffersonianum)
… cascades initiated by larval populations of Ambystoma jeffersonianum that varied in size structure based on diversity of maternal lines (i.e., sibship diversity) by quantifying the effect on larval salamanders, benthic macroinvertebrates, zooplankton, phytoplankton, and periphyton, as well as …
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A Comparison of Limb Development of the Salamanders Plethodon Cinereus and Ambystoma Mexicanum
… limb pairs in the species Plethodon cinereus and Ambystoma mexicanum are compared. Using histology and microCT on embryonic and juvenile specimens, there are few observable differences in the relative order of skeletal element appearance, and both species exhibit preaxial polarity. The resolution …
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