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Showing 1 to 16 of 16 for “"Cambarus"”.
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Effects of acidification on the crayfish Cambarus bartonii bartonii in southern Appalachian streams
… biology and acid tolerance of the crayfish Cambarus bartonii bartonii (Fabricius) from southern Appalachian Mountain streams were investigated. Field studies were conducted primarily from May through October, 1985 at Coweeta Hydrologic Laboratory (U. S. Forest Service Southeastern …
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Using Maximum Entropy to Model the Distribution of an Endangered, Endemic Crayfish Cambarus Harti (Hobbs)
<p><em>Cambarus harti </em>is a<em> </em>state-listed endangered, endemic crayfish found only in three counties in mid-west Georgia. Several studies have attempted to characterize the biology and ecology of this crayfish, however data regarding the distribution of this rare, endemic crayfish …
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The Effect of Divalent Cations on the Prophenoloxidase Enzyme Cascade Activity in the Freshwater Crayfish Cambarus Latimanus
… (proPO) was studied in hemocytes of the crayfish Cambarus latimanus. It was demonstrated that cadmium, calcium, copper and lead increased proPO activity significantly, whereas magnesium had no statistically significant effect on the system. Also, the molecular weight of the proPO enzyme was …
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The entocytherid ostracod fauna of the James and York River basins
… and Phymocythere phyma occur on the crayfishes Cambarus acuminatus, C. b. bartonii, C. longulus and Orconectes juvenilis in the streams of the Valley and Ridge Province. In the Coastal Plain where sluggish streams are encountered, Ankylocythere telmoecea and Ank. tiphophila are associated with …
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Natural history and ecological observations of a population of Conhaway crayfishes and their symbiotic branchiobdellidan associates
… in several species. The Conhaway crayfish, Cambarus appalachiensis, is a species of crayfish endemic to the New River Basin in Virginia and West Virginia. We studied a population of C. appalachiensis in Sinking Creek in Newport, VA from March 2017 until February 2018. We collected …
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Habitat Modeling of Three Endemic Crayfish Species in the Black River Drainage of Missouri and Arkansas: Factors Affecting Distribution and Abundance
… Orconectes eupunctus, Orconectes marchandi, and Cambarus hubbsi are three such endemics that are threatened by a limited natural distribution and the invasions of Orconectes neglectus. I sought to determine how natural and anthropogenic factors influence these three species across multiple …
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Using a multi-dimensional approach to determine the conservation and taxonomic statuses of two rare crayfishes in northern Arkansas
… of this study was to deepen our understanding of Cambarus causeyi, the Boston Mountain Crayfish, and Cambarus hubbsi, Hubbs’ Crayfish, so they can be more effectively conserved and managed. Cambarus causeyi and C. hubbsi are classified as Species of Greatest Conservation Need in Arkansas, and they …
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Modern Invertebrate Footprints Compared with Fossil Footprints from the Coconino Sandstone (Permian)
… studies of trackways of the crayfish, Cambarus clarkii were conducted, and the footprints compared with fossil invertebrate footprints (Paleohelcura sp.) of the Permian Coconino sandstone of Northern Arizona, and similar footprints of other sandstone. Fine grained sand (similar to that …
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Spontaneous directional preferences in taxonomically and ecologically distinct organisms: examining cues and underlying mechanisms
… turtles (Chelydra serpentina) and crayfish (Cambarus sciotensis) spontaneously align their body axes relative to the magnetic field. In snapping turtles, this response is sensitive to low-level radio frequency fields, consistent with a mechanism involving a light-dependent radical pair …
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Towards an understanding of symbiont natural history through studies of crayfish and their annelid associates
… of a mutualism. Specifically, I show that Cambarus crayfish display a consistent ontogenetic shift in resistance to the colonization of branchiobdellidans and this shift likely reflects underlying changes in the costs and benefits of symbiosis. I then show that this change in host …
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Invasive Hosts and their Context Dependent Relationships with Native Symbionts
… invasive host F. cristavarius to a native host Cambarus appalachiensis to measure the response of growth rate, symbiont damage to gills, and behavior of worms across a gradient of symbiont exposure. The native host's growth rates increased over time, but not due to an effect of symbionts. …
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The roles of predation, competition, and exploitation in the community dynamics of the New River in West Virginia
… virilis, Orconectes sanbornii sanbornii, and Cambarus sciotensis), hellgrammite (Corydalus cornutus larvae), smallmouth bass (Micropterus dolomieui), rock bass (Ambloplites rupestris), and flathead catfish (Pylodictis olivaris) populations were quantified to evaluate the status of these stocks …
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A Comparison of Adult and Sub-Adult Walleye Movements and Distribution in Lakes Having Simple and Complex Morphometry
… the spring. Zooplankton, fishes, and crayfishes Cambarus sp. dominated white bass diets at Lake Kampeska. At Lake Enemy Swim, 126 walleye stomachs and 56 northern pike stomachs contained food. Yellow perch were the dominant food item of both walleyes and northern pike. Ultrasonic telemetry was …
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Characterizing Wetland Hydrology, Chemistry, And Soils For An Endemic Crayfish, The Piedmont Blue Burrower
<p>Anthropogenic alteration of Earth's ecosystems has pushed global biodiversity into a state of crisis. Freshwater species have been particularly vulnerable, with crayfish ranking as the second most imperiled taxonomic group in North America. Primary burrowers represent only 15% of crayfish …