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Showing 1 to 16 of 16 for “"hellbender"”.
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Age and Growth of the Ozark Hellbender
Length-specific growth rates of Ozark hellbenders, Cryptobranchus alleganiensis bishopi, from the North Fork of the White River, Missouri, were calculated by regression from growth of marked and recaptured hellbenders. Growth rates declined steadily after transformation, going from about 74 mm …
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Home Range and Nocturnal Activity of the Ozark Hellbender
… ranges and nocturnal activity of seven Ozark hellbenders, Cryptobranchus alleganiensis bishipi, in the North Fork of the White River, Ozark County, Missouri, during a 14 day period in August, 1979. The mean elliptical home range for combined sexes was 90.01 m² (82.92 m² for males, 99.43 m² for …
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Reproductive Endocrinology of the Ozark Hellbender, Cryptobranchus Alleganiensis Bishopi
… concentrations in the serum of adult Ozark hellbenders, Cryptobranchus alleganiensis bishopi, were investigated from June 1993 to December, 1993. These dates included the periods before, during and after the breeding season. Radioimmunoassays were performed to measure the concentrations of …
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Food Habits, Starvation and Growth in the Hellbender, Cryptobranchus Alleganiensis
Cryptobranchus alleganiensis were captured from the Niangua River of Missouri throughout 1974 for a food habits study. Crayfish were the dominant food item, with fish secondary; together, they constituted over 90 percent of stomach content weights in all months. Both fish and crayfish showed …
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Habitat Analysis of the Ozark Hellbender, Cryptobranchus Alleganiensis Bishopi, in Missouri
The habitat of the Ozark hellbender, Cryptobranchus alleganiensis bishopi, was investigated in the Northfork of the White River, Ozark County, Missouri. Microhabitat variables of water depth, current velocity, substrate, and embeddedness were measured for 259 hellbenders. A principal component …
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Status of the Ozark Hellbender (Cryptobranchus Alleganiensis Bishopi): a Long-Term Assessment
… I censused populations of the long-lived Ozark hellbender, Cryptobranchus alleganiensis bishopi, in three rivers in Missouri, and compared the 1998 data to data from previous studies from the 1970's and 1980's. Ozark hellbenders appear to have declined in numbers. This decline is characterized …
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Improving the Utility of Artificial Shelters for Monitoring Eastern Hellbender Salamanders (Cryptobranchus alleganiensis alleganiensis)
… as novel, non-invasive tools for studying hellbenders, but their use thus far has faced several challenges. During initial trials in multiple river networks, artificial shelters routinely became blocked by sediment and dislodged during high stream discharge events, and were rarely used by …
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The Influence of Reduced Forest Cover and Dissolved Oxygen on the Viability of Eggs from Eastern Hellbenders (<i>Cryptobranchus alleganiensis</i>)
… freshwater habitat specialist, the Eastern hellbender. Hellbenders are a large-bodied, long-lived amphibian that inhabits fast flowing, cold mountain streams in the eastern United States. Over the last several decades, hellbender populations have experienced declines that are associated with …
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Status of the Eastern Hellbender (Cryptobranchus Alleganiensis Alleganiensis) in Missouri: a Comparison of Past and Present Populations
Eastern hellbenders, Cryptobranchus alleganiensis alleganiensis, were collected from the Big Piney, Gasconade, and Niangua Rivers. Total length and mass measurements were taken for comparison with historical data from the same rivers. There have been substantial declines in the numbers of …
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Effects of Land Use on Hellbenders (Cryptobranchus alleganiensis) at Multiple Levels and Efficacy of Artificial Shelters as a Monitoring Tool
… they do can help focus conservation planning. Hellbenders (Cryptobranchus alleganiensis) are a freshwater species of increasing conservation concern that are suspected to have declined due to loss of forest cover. However, quantitative evidence of land use effects on hellbenders is lacking. I …
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Behavior and conservation: hellbender reproductive behavioral responses to poor water quality and the value of private lands research for conservation outreach
… I discuss the ways in which human and hellbender behaviors relate to conservation. First, using survey and interview data, I explore the reasons why private landowners allow access to their property for research. I find that landowners are more likely to allow research on their property …
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A Re-Evaluation of the Pleistocene Hellbender, <em>Cryptobranchus guildayi</em>, and an Overview of <em>Cryptobranchus</em> Remains from Appalachian Caves.
… large salamander that is closely related to the hellbender, <em>Cryptobranchus alleganiensis</em>. The validity of this extinct taxon has been questioned, so an expanded osteological sample of modern hellbenders was used for comparative purposes with the <em>C. guildayi</em> fossil material. …
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Down Stream [Appalachia]
… and other freshwater mussels; and the Eastern Hellbender Salamander (Cryptobranchus alleganiensis alleganiensis). This paper examines the context and content of this installation, its progression and influences, and themes of ecology and the environment in the Southeast United States.
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The Influence of Environmental Conditions and Co-Occurring Parasites on Blood Physiology in Eastern Hellbenders (<i>Cryptobranchus alleganiensis</i>)
… in a wild population of male Eastern Hellbender salamanders (<i>Cryptobranchus alleganiensis</i>) which remain with their nest for up to ~8 months and have frequent encounters with parasitic leeches (<i>Placobdella appalachiensis</i>) that transmit hematophagous endoparasites …