Download or read book Development and Viability of Alligator Snapping Turtle Macroclemys Temminckii Reptilia Testudines Chelydridae Eggs Embryos and Hatchlings Incubated in Soils with Different Pesticide Risks written by Richard Heath Rauschenberger and published by . This book was released on 2001 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Diet Variation and Vitamin Enrichment on Growth of Hatchling Alligator Snapping Turtles Macroclemys Temminckii Troost written by Michael Thomas Harrell and published by . This book was released on 1998 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nesting Ecology of the Alligator Snapping Turtle Macroclemys Temminckii Along the Lower Apalachicola River Florida written by Michael Allyn Ewert and published by . This book was released on 1994 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cryptic Evolution and Population Structure in the Alligator Snapping Turtle Macroclemys Temminckii written by Joe Roman and published by . This book was released on 1997 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Alligator Snapping Turtle written by Peter Charles Howard Pritchard and published by . This book was released on 2006 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The alligator snapping turtle is one of the most celebrated of the world's turtles. Yet, despite its unquestionable familiarity among even the most dilettante turtle enthusiasts and hobbyist, it remains a rather poorly-known species. This text takes a look at the turtle.
Download or read book Ecology of Hatchling Alligator Snapping Turtles Macrochelys Temminckii written by Sarah Spangler and published by . This book was released on 2017 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: Little is known about the first year of life for many of the world’s freshwater turtles. This is due in part to their cryptic nature and the difficulty of locating hatchlings in the wild. The lack of information about this demographically important age group has led researchers to draw conclusions from indirect inferences about survival rates and ecological roles of hatchlings that may or may not be accurate. To begin filling in some of these gaps, I focused on the first year in an alligator snapping turtle’s life. I studied: (1) circadian and circannual patterns of activity, (2) growth rates and how they are related to activity rates, (3) habitat preferences, (4) fall movement patterns, and (5) predation patterns. My study site was within the species’ natural range in southeastern Oklahoma. Unlike adults, hatchlings followed a predominantly diurnal activity pattern for much of the year, with peak activity occurring during the mid-hours of the day. The diurnal habit of hatchlings may be a strategy to temporally partition themselves from nocturnal predators. There were no significant relationships between growth rates and activity rates during any period, potentially due to small sample size. Hatchlings were located in areas of increased cover and shallower water depths, when compared to random locations. Their movement patterns were characterized by an initial movement away from the site of release to a location with suitable habitat characteristics, and they tended to stay at these locations for extended periods. I documented depredation by fish, but not by terrestrial predators such as raccoons.
Download or read book Reproduction and Growth in the Alligator Snapping Turtle Macroclemys Temmincki Troost written by James Logie Dobie and published by . This book was released on 1966 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reproductive Biology and Conservation Genetics of the Alligator Snapping Turtle macrochelys Temminckii written by Amber R. Teare and published by . This book was released on 2010 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: Author's abstract: The alligator snapping turtle (Macrochelys temminckii) is a highly aquatic turtle only found in Gulf of Mexico drainages. The biology of this species remains relatively unknown, despite years of harvest and use as a zoological attraction. The purposes of this study were to (1) determine gender size classes and assess sexual size dimorphism, (2) delineate the reproductive cycle of M. temminckii, particularly their sex steroid seasonality, and (3) evaluate possible genetic divergence between M. temminckii found in southwest Georgia and northern Florida. Alligator snapping turtles exhibit pronounced sexual size dimorphism as adults. However, determining sex in smaller individuals is difficult. The purpose of this study was to assess gender size classes and sexual dimorphism in Macrochelys temminckii. Alligator snapping turtles in southwest Georgia were trapped from March 2008 to April 2010. Captured turtles were bled, sexed based on size and ultrasound, and measured for multiple characteristics. For all measurements, adult males were larger than females. The relationships between carapace length, plastron-to-vent length, and testosterone levels were used to determine gender of smaller individuals. To ensure accurate sexual assignment when studying M. temminckii, data from multiple methods (morphological measurements, ultrasonography, testosterone levels, and, laparoscopy) should be used. To delineate the reproductive cycle of M. temminckii, blood samples were taken from captured individuals, and plasma testosterone and estradiol were measured using enzyme immunoassay. Males exhibited seasonal changes in testosterone levels, with maximum levels occurring in October. Mating behavior was elucidated from the appearance of wounds on males that only occurred in April. Females displayed seasonality in testosterone and estradiol levels, with relative peaks occurring in March and April (mating and ovulation) and September and October (follicular development). Genetic structure between M. temminckii populations separated by a dam and under different hunting pressures was assessed using microsatellite loci. Average number of alleles per locus and number of unique alleles was higher for the Florida population. Genetic structure was detected between the populations (FST = 0.043, p = 0.001). The rapid development of structuring between Florida and Georgia M. temminckii warrants further investigation into the effects of fragmentation and overexploitation on this species.
Download or read book Habitat Use and Movements of Alligator Snapping Turtle Macrochelys Temminckii Hatchlings written by Amity Ann Bass and published by . This book was released on 2007 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this study was to gather data concerning home range, movements, and habitat use of hatchling Alligator Snapping Turtles ... in order to better manage for this species. Nineteen hatchlings were tracked at Black Bayou Lake National Wildlife Refuge during 2006. Ten animals were successfully tracked during the spring and nine during the fall. Hatchlings that were incubated in the laboratory or naturally on the railroad causeway were heavier and had longer carapace lengths than those naturally incubated along the forest-old field edge of the peninsula (p
Download or read book Feeding and Movements in the Alligator Snapping Turtle Macroclemys Temminckii written by Aaron Bitterman and published by . This book was released on 1994 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Population Structure and Reproduction of Alligator Snapping Turtles Macrochelys i e Macroclemys Temminckii at Black Bayou Lake National Wildlife Refuge written by Lori Brianne Woosley and published by . This book was released on 2005 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Biology and Status of the Alligator Snapping Turtle Macroclemys Temmincki with Research and Management Recommendations written by Peter Charles Howard Pritchard and published by . This book was released on 1982 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Egg Incubation Condition on the Post hatching Growth and Performance of the Snapping Turtle Chelydra Serpentina written by and published by . This book was released on 1990 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of incubation temperature on the post-hatching growth and performance capacities of the common snapping turtle, Chelydra serpentina was investigated in the laboratory. Turtle eggs were collected from four sites in New York State and randomly assigned to four incubation temperature treatments to produce males (constant 26[degree]C and downshifted 30-26-30[degree]C) and females (constant 30[degree]C and upshifted 26-30-26[degree]C) under constant and altered temperature regimes. The incubation conditions resulted in 92% males from the constant 26[degree]C group and 93% males from the downshifted group. 100% females resulted from both the constant 30[degree]C group and the upshifted group. Turtles hatching from eggs incubated constantly at 26[degree]C were significantly larger than hatchlings from eggs incubated at a constant 30[degree]C or downshifted. Hatchlings were raised in individual aquaria at 25[degree]C and fed earthworms and fish. After a 9-month growth period, turtles which had been incubated at a constant 30[degree]C gained significantly more mass than did turtles from eggs which had been downshifted or upshifted. There was no extended effect of incubation condition on Post-hatching performance and learning ability as measured by righting and feeding responses. Thus, the mass gain differences seen in this study suggest that physiological differences do result as the consequence of incubation condition. However, these physiological differences are not reflected in normal locomotive or feeding behavior.
Download or read book Effect of Ingestion by Alligator Snapping Turtles Macrochelys Temminckii on Seeds of Riparian Vegetation written by Jean Pierre Elbers and published by . This book was released on 2010 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: The alligator snapping turtle (Macrochelys temminckii) is a large freshwater turtle that inhabits many lotic water bodies in the Southeastern United States. The species consumes primarily fish but also consumes large amounts of vegetation including seeds of common persimmon (Diospyros virginiana), tupelos (Nyssa sp.), willow oak (Quercus phellos), and pecan (Carya illinoensis). Captive specimens of M. temminckii were fed samples of the above-mentioned seeds to assess how the species affects ingested seeds in order to evaluate the potential role this species may play as a seed disperser. The proportion of seeds defecated intact varied with species (57-99 %), was lowest in D. virginiana, and highest in N. aquatica. Ingestion reduced the percentage of seeds that germinated in comparison to uneaten controls in all species except Q. phellos where ingestion increased germination percent. Germination percent also decreased the longer seeds remained inside turtles. Ingestion reduced the germination rates of D. virginiana and N. aquatica seeds but increased germination rates for seeds of Q. phellos in comparison to uneaten controls. Due to fungal contamination, conclusions could not be drawn regarding the effect of ingestion on germination percent or rate of C. illinoensis seeds. This study suggests M. temminckii could potentially play some role as a disperser of Q. phellos and N. aquatica but is less likely for D. virginiana. Information regarding post-dispersal fates of seeds ingested by M. temminckii and other freshwater turtles is needed to evaluate the importance of freshwater turtles as dispersers of riparian and wetland vegetation.
Download or read book Genetic Tools for Forensic Identification of Meat and Byproducts from the Alligator Snapping Turtle macroclemys Temminckii and Common Snapping Turtle chelydra Serpentina written by Joe Roman and published by . This book was released on 1996 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reproductive Biology of Alligator Snapping Turtles written by Denise Michele Thompson and published by . This book was released on 2013 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: Successful production of offspring (and ultimately grand-offspring) defines organisms' fitness. Therefore, I investigated three critical aspects of reproduction in the alligator snapping turtle (Macrochelys temminckii), a model organism that is of great conservation interest. Specifically, I studied: (1) nesting behavior and (2) maternal reproductive investment patterns in a captive alligator snapping turtle population housed outdoors under semi-natural conditions, and (3) nest predation patterns in a reintroduced population. Both sites were located in the species' geographic range in southern Oklahoma. Females averaged 25 terrestrial forays prior to successfully nesting and average nesting duration was 185 minutes. Nesting activity positively correlated with increasing temperature, but did not correspond with rainfall. Larger females tended to lay larger eggs but the number of eggs per clutch was not related to female size. Instead, females primarily increased fecundity by allocating extra resources to producing more eggs rather than larger eggs. Raccoons (Procyon lotor) are the most important nest predator in the population studied, and I investigated the role of soil disturbance and turtle olfactory stimuli in raccoon responses to artificially constructed alligator snapping turtle nests. Raccoons primarily used soil disturbance cues to detect artificial nests; however, after being detected nests with soil disturbance were more likely to survive an encounter with a raccoon than a nest that lacked visual stimuli. The conspicuous nesting strategy employed by M. temminckii is discussed as a potential evolutionarily adaptive strategy to disguise the exact location of the clutch from predators.
Download or read book Assessment of Paternity in Alligator Snapping Turtle Macrochelys Temminckii Clutches written by Lauren Besenhofer and published by . This book was released on 2006 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: Three of seven microsatellite loci tested on Machrochelys were variable (from three to five alleles per locus) and provided evidence of multiple paternity in 13 out of 14 clutches from Black Bayou Lake National Wildlife Refuge. These findings have implications for the mating strategy of Macrochelys, including the prevalence of sperm storage and multiple matings. Multiple paternity is an important strategy in threatened or endangered species because it may help increase effective population size and genetic variability.
