Habitat Modeling Of Three Endemic Crayfish Species In The Black River Drainage Of Missouri And Arkansas PDF Download

Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Habitat Modeling Of Three Endemic Crayfish Species In The Black River Drainage Of Missouri And Arkansas PDF full book. Access full book title Habitat Modeling Of Three Endemic Crayfish Species In The Black River Drainage Of Missouri And Arkansas.

Habitat Modeling of Three Endemic Crayfish Species in the Black River Drainage of Missouri and Arkansas

Habitat Modeling of Three Endemic Crayfish Species in the Black River Drainage of Missouri and Arkansas
Author: Matthew Stephen Nolen
Publisher:
Total Pages: 124
Release: 2012
Genre: Crayfish
ISBN: 9781267794550
GET BOOK

Download Habitat Modeling of Three Endemic Crayfish Species in the Black River Drainage of Missouri and Arkansas Book in PDF, ePub and Kindle

The Ozark faunal region of Missouri and Arkansas harbors a high level of aquatic biological diversity, especially in regards to endemic crayfish. 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 spatial scales. Local and landscape data were used in decision tree analyses (CART) to determine their influence effect on presence/absence and density of the three species. Predictive models were validated using k-fold cross validation. O. eupunctus presence was positively associated with factors related to stream size, current velocity, and spring discharge. Orconectes marchandi presence was predicted primarily by dolomite geology and water chemistry metrics, both of which may be related to spring flow volume. Cambarus hubbsi was associated with factors related to stream size and spring flow volume, with highest densities occurring in deep waters. Models predicting crayfish presence/absence consistently outperformed random models. Orconectes eupunctus was the rarest of the three species, occurring at only 9 sites. Orconectes marchandi was restricted to the Spring River drainage, and C. hubbsi was found in all three drainages. The models were effective in modeling rare crayfish species and the results were consistent with previous observations of the three species. Conservation attention may be necessary to protect groundwater resources and to safeguard against further invasions of O. neglectus.

Influence of Stream Permanence, Predation, and Invasive Species on Crayfish in the Ozark Highlands with an Emphasis on Species of Greatest Conservation Need (Orconectes Marchandi, Orconectes Eupunctus and Cambarus Hubbsi)

Influence of Stream Permanence, Predation, and Invasive Species on Crayfish in the Ozark Highlands with an Emphasis on Species of Greatest Conservation Need (Orconectes Marchandi, Orconectes Eupunctus and Cambarus Hubbsi)
Author: Allyson Noelle Yarra
Publisher:
Total Pages: 212
Release: 2017
Genre: Crayfish
ISBN:
GET BOOK

Download Influence of Stream Permanence, Predation, and Invasive Species on Crayfish in the Ozark Highlands with an Emphasis on Species of Greatest Conservation Need (Orconectes Marchandi, Orconectes Eupunctus and Cambarus Hubbsi) Book in PDF, ePub and Kindle

Due to the ecological importance of crayfish and the increasing vulnerability of freshwater systems due to habitat loss, invasive species, and hydrologic alteration, understanding crayfish-environment relationships is crucial in the context of aquatic species conservation. I sought to examine the influence of hydrologic variation among intermittent and permanent streams on crayfish occupancy, abundance, predation risk, and potential vulnerability to invasive species effects. I conducted crayfish and environmental data sampling during two consecutive summers across 20 Ozark streams of differing permanence levels (10 intermittent, 10 permanent). In these same streams, I conducted fish and scat surveys over the course of four seasons. In addition, I performed population modeling based on previously collected data to understand the population dynamics of three crayfish species of greatest conservation need (Orconectes eupunctus, Orconectes marchandi, and Cambarus hubbsi) in the Spring River drainage of Arkansas and Missouri and assess their risk of invasive species and drought effects. I determined that occupancy of all crayfish species collected in my study was related to stream permanence. In most cases, crayfish abundance was largely related to stream permanence rather than local habitat. I documented that two species of conservation concern (i.e., Orconectes williamsi, Orconectes meeki) appear dependent on intermittent streams. Stream permanence, however, did not appear to influence crayfish predation by riparian mammals in my study. Crayfish predation pressure by mammals appeared to be determined by season and was strongest in spring and summer. The prevalence of fish prey in mammalian diets appeared to be strongly influenced by a season by stream permanence interaction, and this may be the first study to document such an observation. Lastly, my population modeling procedure indicated the potential of the Spring River to serve as a refuge for O. eupunctus and C. hubbsi when invasion and drought effects are strong in the surrounding area. Conversely, the Spring River appears to serve as a barrier to dispersal for O. marchandi which could result in high extinction risk of the population under invasive species effects. This thesis adds to the knowledge of flow-ecology relationships and invasive species effects in the Ozark Highlands.

The Crayfish of Missouri

The Crayfish of Missouri
Author: Mary Isabelle Steele
Publisher:
Total Pages: 108
Release: 1902
Genre: Crayfish
ISBN:
GET BOOK

Download The Crayfish of Missouri Book in PDF, ePub and Kindle

Crayfish

Crayfish
Author: Felipe Bezerra Ribeiro
Publisher:
Total Pages: 0
Release: 2020
Genre: Crayfish
ISBN: 9781536169416
GET BOOK

Download Crayfish Book in PDF, ePub and Kindle

Crayfish are one of the most iconic freshwater crustacean groups of the world. The wide range of biological adaptations of the freshwater crayfish to the limnetic ecosystems is surprising, as is there is high potential of some taxa to become invasive species. There is a constant growing interest in develop research with freshwater crayfish. They can be an important food source in several countries, the aquarium pet trade and cultural importance, in addition to the presence of several imperiled species. This book brings important reviews of some aspects of diversity, biological features, evolution, habitat characteristics, behavior and conservation strategies of freshwater crayfish, including native taxa, especially endemic from South America, New Guinea and North America, and non-indigenous species. In South American, new species have been discovered in recent years and are classified in threat categories, indicating the need of more studies regarding taxonomy and conservation. For New Guinean species, data about their exploitation by humans and further perspectives about the improvement of conservation practices are presented. In relation to the North American crayfish, this book brings information about some aspects of biology and behavior of the burrowing species Procambarus acanthophorus. A global assessment and future perspectives for all alien crayfish species are also presented in this book. Regarding the partenogenetic marbled crayfish, Procambarus virginalis, the book brings an extensive review covering aspects of detection history, biology, ecology, evolution, systematics and utilization of this species in the world. In additon, an overview of integrative taxonomy studies and cryptic diversity in crayfish is also presented

The Impacts of Flow Alterations to Crayfishes in Southeastern Oklahoma, with Emphasis on the Mena Crayfish (Orconectes Menae)

The Impacts of Flow Alterations to Crayfishes in Southeastern Oklahoma, with Emphasis on the Mena Crayfish (Orconectes Menae)
Author: Joseph J. Dyer
Publisher:
Total Pages: 109
Release: 2014
Genre:
ISBN:
GET BOOK

Download The Impacts of Flow Alterations to Crayfishes in Southeastern Oklahoma, with Emphasis on the Mena Crayfish (Orconectes Menae) Book in PDF, ePub and Kindle

Humans have the ability to impact their environment more than any other animal on the planet. Our activities can alter the environment to the point that it is unsuitable to the native species resulting in a loss of biodiversity. Scientist now understand the importance of biodiversity and have begun to call for the conservation of vulnerable species. Species that are narrowly endemic are considered to be vulnerable because they use specific habitats that are highly susceptible to human disturbance. The components to species conservation are 1.) delineate the spatial distribution of the species, 2.) understand how the species interacts with its environment, and 3.) employ management strategies based on the ecology of the species. In this study, I investigated several crayfish species that are endemic to the Ouachita Mountains in Oklahoma and Arkansas. I established the spatial distributions of the crayfish using Maximum Entropy species distribution modeling. I then investigated crayfish habitat use with quantitative sampling and a movement study. Finally, I studied the ability of crayfish to burrow under different conditions. I found that crayfish distribution at the landscape scale is driven by climate, geology and elevation. In general, the crayfish in my study occurred above 300 m elevation where the geology was dominated by sandstone and shale, and rainfall totals were the highest. My quantitative data indicated that crayfish did not select for specific habitat types at the reach scale; however, crayfish appeared to use shallow and dry habitat even as streams dried. There was a lot of variability in the movement study but crayfish tended to burrow in response to drought. In my burrowing experiments I found that pebble substrate can restrict crayfish burrowing more than cobble substrate. I also found that fine sediment restricts crayfish burrowing ability regardless of substrate size. The combination of sedimentation and climate change is likely to have a negative impact on these crayfish.

Crayfishes of Alabama

Crayfishes of Alabama
Author: Guenter A. Schuster
Publisher: University of Alabama Press
Total Pages: 519
Release: 2022-04-19
Genre: Nature
ISBN: 0817321063
GET BOOK

Download Crayfishes of Alabama Book in PDF, ePub and Kindle

"This book represents the most in-depth treatment of crayfishes for the state of Alabama to date. Alabama is currently known to host 99 species of crayfishes. The findings in this book are based on more than 9,000 records gathered from across the entire state. The authors collected specimens and data from all of Alabama's major and minor waterways and lakes, as well as specialized habitats such as burrows, roadside ditches, marshes, swamps, and temporary autumnal ponds. They visited all the major museums with holdings of crayfish specimens from Alabama, yielding a list of historical records including 4,259 specimen lots from approximately 2,200 unique locations. These records were used to build a database containing all available specimen metadata, including, but not limited to: species identification, number of individuals collected, location, date of collection, names of collectors, who identified the specimens, and the museum in which they are stored. Field work was conducted over a 14-year period during which a total of 4,487 specimen lots were collected and added to the database from approximately 2,600 unique locations sampled across Alabama. Prior to this book, no single comprehensive book or reference has ever been published on the crayfishes of Alabama. This book compiles 166 years of crayfish distributional and biological data for the 99 known Alabama species. It begins with chapters on the physiography and waterways of Alabama. One chapter discusses the general distributional patterns and habitat associations of Alabama crayfishes. Subsequent chapters discuss crayfish biology, ecology, conservation, and anatomy. Detailed species accounts include descriptions of morphological characters, life color, maximum size, comparative species, distribution and habitat, biology, crayfish associates, and conservation status. Color photographs, morphological plates, and dot maps showing distributions are included for each species; for many species, multiple color photos demonstrate the known color variations within each species. An illustrated key is provided to guide the identification of all 99 species. As the most up-to-date and comprehensive source of information on Alabama crayfishes to date, "Crayfishes of Alabama" provides a new perspective on Alabama's unique place as a biodiversity hotspot. It will be of lasting value to aquatic biologists and ecologists throughout the Southeast and crayfish biologists around the world, as well as of interest to natural resource managers, aquaculture farmers, and naturalists"--

Distribution, Habitat Preference, and Conservation Status of a Kentucky Endemic Crayfish Species

Distribution, Habitat Preference, and Conservation Status of a Kentucky Endemic Crayfish Species
Author: Zachary L. Couch
Publisher:
Total Pages: 208
Release: 2010
Genre: Beargrass Creek (Ky.)
ISBN:
GET BOOK

Download Distribution, Habitat Preference, and Conservation Status of a Kentucky Endemic Crayfish Species Book in PDF, ePub and Kindle

The Louisville crayfish (Orconectes jeffersoni) is a poorly known member of the family Cambaridae. I conducted qualitative and quantitative surveys from 2007-2010 throughout Kentucky and southern Indiana, USA, in order to better define the range of the species, characterize its habitat requirements, assess its conservation status, and determine population densities in selected streams. I used a General Linear Model (GLM) Univariate Analysis of Variance to test if O. jeffersoni partitions macrohabitat (riffle, run, and pool) by size and a Chi Square test of independence to determine if O. jeffersoni partitions macrohabitat by gender. During qualitative sampling events, O. jeffersoni was found to be restricted to first to third order streams flowing through uplands experiencing varying degrees of urban influence in Bullitt, Hardin, Jefferson, and Oldham Counties, Kentucky. Orconectes jeffersoni density was found to be 1.23 (±1.81) individuals/0.25m2 over all quantitative sites. No significant difference in O. jeffersoni density was observed among flow regimes (riffle, run, and pool). There was a significant relationship between stream substrate and O. jeffersoni density. Additionally, O. jeffersoni did not seem to partition microhabitat based upon size or gender. The results of this study indicate that O. jeffersoni is a habitat generalist, and that it is restricted to a small geographic range; possibly due to a natural barrier to travel represented by the Ohio River. This study serves to assist natural resource professionals with the management and conservation of the Louisville crayfish.