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Articles 4261 - 4290 of 6144

Full-Text Articles in Biodiversity

Behavior Comparisons For Whooping Cranes Raised By Costumed Caregivers And Trained For An Ultralight-Led Migration, Glenn H. Olsen, John B. French Jan 2008

Behavior Comparisons For Whooping Cranes Raised By Costumed Caregivers And Trained For An Ultralight-Led Migration, Glenn H. Olsen, John B. French

Proceedings of the North American Crane Workshop

The successful reintroduction program being run by the Whooping Crane Eastern Partnership using whooping cranes (Grus americana) trained to fly behind ultralight aircraft depends on a supply of these trained crane colts each year. The crane colts are hatched from eggs contributed by the various partners and trained to follow costume clad humans and ultralight aircraft at USGS Patuxent Wildlife Research Center, Laurel, Maryland, USA. After several seasons of raising small numbers of crane colts (7-14), we wanted to increase the number of birds being trained, but were restrained by limits in our facilities. By altering the established …


Safety Of West Nile Virus Vaccines In Sandhill Crane Chicks, Glenn H. Olsen, Kimberli J. Miller, Douglas E. Docherty, Valerie Bochsler Jan 2008

Safety Of West Nile Virus Vaccines In Sandhill Crane Chicks, Glenn H. Olsen, Kimberli J. Miller, Douglas E. Docherty, Valerie Bochsler

Proceedings of the North American Crane Workshop

West Nile virus arrived in North America in 1999 and has spread across the continent in the ensuing years. The virus has proven deadly to a variety of native avian species including sandhill cranes (Grus canadensis). In order to provide safe and efficacious protection for captive and released populations of whooping cranes (G. americana), we have conducted a series of four research projects. The last of these was a study of the effects of two different West Nile virus vaccines on young Florida sandhill crane (G. c. pratensis) chicks and subsequent challenge with the virus. …


Use Of Clap Traps In Capturing Nonmigratory Whooping Cranes In Florida, Jeannette M. Parker, Martin J. Folk, Stephen B. Baynes, Kristen L. Candelora Jan 2008

Use Of Clap Traps In Capturing Nonmigratory Whooping Cranes In Florida, Jeannette M. Parker, Martin J. Folk, Stephen B. Baynes, Kristen L. Candelora

Proceedings of the North American Crane Workshop

Between March 2001 and April 2005 we captured 28 nonmigratory Florida whooping cranes (Grus americana) with clap traps. Out of the 6 different capture methods we employed, the clap trap accounted for 42% of our birds captured. Its ability to safely capture one crane or multiple cranes simultaneously, flexibility in size and placement, and low cost make it an important tool to facilitate transmitter replacements and health checks among the experimental Florida whooping crane population.


A Low Intensity Sampling Method For Assessing Blue Crab Abundance At Aransas National Wildlife Refuge And Preliminary Results On The Relationship Of Blue Crab Abundance To Whooping Crane Winter Mortality, Bruce H. Pugesek, Michael J. Baldwin, Thomas V. Stehn Jan 2008

A Low Intensity Sampling Method For Assessing Blue Crab Abundance At Aransas National Wildlife Refuge And Preliminary Results On The Relationship Of Blue Crab Abundance To Whooping Crane Winter Mortality, Bruce H. Pugesek, Michael J. Baldwin, Thomas V. Stehn

Proceedings of the North American Crane Workshop

We sampled blue crabs (Callinectes sapidus) in marshes on the Aransas National Wildlife Refuge, Texas from 1997 to 2005 to determine whether whooping crane (Grus americana) mortality was related to the availability of this food source. For four years, 1997 - 2001, we sampled monthly from the fall through the spring. From these data, we developed a reduced sampling effort method that adequately characterized crab abundance and reduced the potential for disturbance to the cranes. Four additional years of data were collected with the reduced sampling effort methods. Yearly variation in crab numbers was high, ranging …


Whooping Crane Collisions With Power Lines: An Issue Paper, Thomas V. Stehn, Tom Wassenich Jan 2008

Whooping Crane Collisions With Power Lines: An Issue Paper, Thomas V. Stehn, Tom Wassenich

Proceedings of the North American Crane Workshop

Collision with power lines is the greatest source of mortality for fledged whooping cranes (Grus americana) in the Aransas-Wood Buffalo population (AWBP) that migrate between the Northwest Territories, Canada to the Texas coast. This paper compiles 45 documented whooping crane mortalities from power line strikes in North America and provides known information on crane / power line interactions. A map of the AWBP whooping crane migration corridor was derived with 100 and 200-mile wide corridors delineated showing the location of known mortalities. Recommendations are provided to try to reduce this major threat facing whooping cranes.


A Year-Long Study Of Food Consumption By Captive Whooping Cranes At The International Crane Foundation, Jessica J. Stocking, Michael S. Putnam, Nathanial B. Warning Jan 2008

A Year-Long Study Of Food Consumption By Captive Whooping Cranes At The International Crane Foundation, Jessica J. Stocking, Michael S. Putnam, Nathanial B. Warning

Proceedings of the North American Crane Workshop

Throughout 2002, we recorded daily food consumption by 12 pairs of captive whooping cranes (Grus americana). For 7 pairs we recorded food consumption throughout the entire year while there were large continuous gaps in measurements of food consumption for 5 pairs that raised chicks that year. Birds received both a maintenance and breeder diet, and for both we converted food consumption to energy intake (Joules/g body mass) using the combined fall weights of female and male. We compared daily energy intake with 6 meteorological variables (involving temperature, wind speed and humidity), photoperiod (natural and artificial) and egg laying …


Resolutions Passed By The North American Crane Working Group, Tenth North American Crane Workshop Zacatecas City, Zacatecas, Mexico, North American Crane Working Group Jan 2008

Resolutions Passed By The North American Crane Working Group, Tenth North American Crane Workshop Zacatecas City, Zacatecas, Mexico, North American Crane Working Group

Proceedings of the North American Crane Workshop

Florida Crane habitat resolution
Florida has the largest population of non-migratory sandhill cranes in the world and winters a significant portion of the eastern population of greater sandhill cranes. And in Florida, efforts are underway to introduce migratory and non-migratory whooping cranes. In order to successfully establish and sustain these populations, appropriate habitat needs to be available. About 40% of Florida’s best crane habitat has been lost between 1973 and 2003, and the amount has increased since then. Because of this, these valuable populations of cranes are finding it more difficult to locate suitable habitat. We the NACWG by this …


Out Of South America: Multiple Origins Of Non-Native Apple Snails In Asia, Kenneth Hayes Jan 2008

Out Of South America: Multiple Origins Of Non-Native Apple Snails In Asia, Kenneth Hayes

Department of Biology Faculty Publications

Apple snails (Ampullariidae: Pomacea) native to the New World have become agricultural and environmental pests widely in southern and eastern Asia since their introduction in about 1980. Although their impacts have been extensively documented, considerable confusion persists regarding their identities and geographical origins. Efforts to resolve the confusion have suffered from inadequate taxonomic and geographical sampling from both native and introduced ranges. Using phylogenetic and genealogical methods, we analysed 610–655 bp of cytochrome c oxidase subunit I DNA sequences from 783 apple snails from 164 Asian locations and 57 native South American locations. In Asia, we found four species of …


Dictionary Of Invertebrate Zoology, Mary Ann Basinger Maggenti, Armand R. Maggenti, Scott Gardner Jan 2008

Dictionary Of Invertebrate Zoology, Mary Ann Basinger Maggenti, Armand R. Maggenti, Scott Gardner

Zea E-Books Collection

An exhaustive dictionary of over 13,000 terms relating to invertebrate zoology, including etymologies, word derivations and taxonomic classification. Entries cover parasitology, nematology, marine invertebrates, insects, and anatomy, biology, and reproductive processes for the following phyla: Acanthocephala Annelida Arthropoda Brachiopoda Bryozoa Chaetognatha Cnidaria Ctenophora Echinodermata Echiura Entoprocta Gastrotricha Gnathostomulida Kinorhyncha Loricifera Mesozoa Mollusca Nemata Nematomorpha Nemertea Onychophora Pentastoma Phoronida Placozoa Platyhelminthes Pogonophora Porifera Priapula Rotifera Sipuncula Tardigrada.

doi:10.13014/K2DR2SN5


Demographic Effects Of Canine Parvovirus On A Free-Ranging Wolf Population Over 30 Years, L. David Mech, Sagar M. Goyal, William J. Paul, Wesley E. Newton Jan 2008

Demographic Effects Of Canine Parvovirus On A Free-Ranging Wolf Population Over 30 Years, L. David Mech, Sagar M. Goyal, William J. Paul, Wesley E. Newton

United States Geological Survey, Northern Prairie Wildlife Research Center: Publications

We followed the course of canine parvovirus (CPV) antibody prevalence in a subpopulation of wolves (Canis lupus) in northeastern Minnesota from 1973, when antibodies were first detected, through 2004. Annual early pup survival was reduced by 70%, and wolf population change was related to CPV antibody prevalence. In the greater Minnesota population of 3,000 wolves, pup survival was reduced by 40–60%. This reduction limited the Minnesota wolf population rate of increase to about 4% per year compared with increases of 16–58% in other populations. Because it is young wolves that disperse, reduced pup survival may have caused reduced …


Weight Changes In Wild Wolves, Canis Lupus, From Ages 2 To 24 Months, L. David Mech Jan 2008

Weight Changes In Wild Wolves, Canis Lupus, From Ages 2 To 24 Months, L. David Mech

United States Geological Survey, Northern Prairie Wildlife Research Center: Publications

Weights of 118 female and 141 male Minnesota Wolves (Canis lupus) aged 2-24 months increased almost linearly from about 8 kg for females and 10 kg for males at 3 months to 30 kg for females and 32 kg for males at 10-12 months and then tended to increase much more slowly in an overall curvilinear trend. Considerable variation was apparent for both sexes during their first year.


Spatial And Temporal Differences In Giant Kidney Worm, Dictophyma Renale, Prevalence In Minnesota Mink, Mustela Vison, L. David Mech Jan 2008

Spatial And Temporal Differences In Giant Kidney Worm, Dictophyma Renale, Prevalence In Minnesota Mink, Mustela Vison, L. David Mech

United States Geological Survey, Northern Prairie Wildlife Research Center: Publications

Examination of 110 Mink (Mustela vison) carcasses from 1998 through 2007 indicated that the giant kidney worm, Dioctophyma renale, occurred in Pine and Kanabec Counties of eastern Minnesota with annual prevalences of 0-92%. Worm prevalence increased from 20% in 1999 to 92% in 2001 and decreased to 6% in 2005. During 2000 to 2007, no worms were found in Mink from Anoka and Chisago Counties (n = 54), and in 2000, none in 107 Mink from LeSeur, Freeborn, Redwood, Brown and Watonwan Counties. Changes in kidney worm prevalence were positively related to trapping success, considered an index …


Wolf Body Mass Cline Across Minnesota Related To Taxonomy?, L. David Mech, William J. Paul Jan 2008

Wolf Body Mass Cline Across Minnesota Related To Taxonomy?, L. David Mech, William J. Paul

United States Geological Survey, Northern Prairie Wildlife Research Center: Publications

Recent genetic studies suggest that in northern Minnesota two species of wolves (Canis lupus L., 1758 or western wolf and Canis lycaon Schreber, 1775 (= Canis rufus Audubon and Bachman, 1851) or eastern wolf) meet and hybridize. However, little morphological information is available about these two types of wolves in Minnesota. We analyzed the mass of 950 female wolves and 1006 males older than 1 year from across northern Minnesota and found that it increased from 26.30 ± 0.56 kg (mean ± SE) for females and 30.60 ± 0.72 kg for males in northeastern Minnesota to 30.01 ± 0.43 …


Muscleworms, Parelaphostrongylus Andersoni (Nematoda: Protostrongylidae), Discovered In Columbia White-Tailed Deer From Oregon And Washington: Implications For Biogeography And Host Associations, Ingrid M. Asmundsson, Jack A. Mortenson, Eric P. Hoberg Jan 2008

Muscleworms, Parelaphostrongylus Andersoni (Nematoda: Protostrongylidae), Discovered In Columbia White-Tailed Deer From Oregon And Washington: Implications For Biogeography And Host Associations, Ingrid M. Asmundsson, Jack A. Mortenson, Eric P. Hoberg

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Parelaphostrongylus andersoni is considered a characteristic nematode infecting white-tailed deer (Odocoileus virginianus). Host and geographic distribution for this parasite, however, remain poorly defined in the region of western North America. Fecal samples collected from Columbia white-tailed deer (O. v. leucurus) in a restricted range endemic to Oregon and Washington, USA, were examined for dorsal-spined larvae characteristic of many protostrongylid nematodes. Multilocus DNA sequence data (internal transcribed spacer 2 and cytochrome c oxidase subunit 1) established the identity and a new record for P. andersoni in a subspecies of white-tailed deer previously unrecognized as hosts. Populations of …


A Macroevolutionary Mosaic: Episodic Host-Switching, Geographical Colonization And Diversification In Complex Host–Parasite Systems [Special Paper], Eric P. Hoberg, Daniel R. Brooks Jan 2008

A Macroevolutionary Mosaic: Episodic Host-Switching, Geographical Colonization And Diversification In Complex Host–Parasite Systems [Special Paper], Eric P. Hoberg, Daniel R. Brooks

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Aim: To integrate ecological fitting, the oscillation hypothesis and the taxon pulse hypothesis into a coherent null model for the evolution of complex host–parasite associations.

Location: Global.

Methods: This paper reviews and synthesizes literature that focuses on phylogenetic analyses and reciprocal mapping of a model system of hosts and their parasites to determine patterns of host–parasite associations and geographical distributions through time.

Results: Host-switching and geographical dispersal of parasites are common phenomena, occurring on many temporal and spatial scales. Diversification involving both co-evolution and colonization explains complex host–parasite associations. Across the expanse of Earth history, the major radiations in host– …


Is The Amphibian Tree Of Life Really Fatally Flawed?, Darrel R. Frost, Taran Grant, Julian Faivovich, Raoul H. Bain, Alexander Haas, Celio F.B. Haddad, Rafael O. De Sá, Et Al. Jan 2008

Is The Amphibian Tree Of Life Really Fatally Flawed?, Darrel R. Frost, Taran Grant, Julian Faivovich, Raoul H. Bain, Alexander Haas, Celio F.B. Haddad, Rafael O. De Sá, Et Al.

Biology Faculty Publications

Wiens (2007, Q. Rev. Biol. 82, 55–56) recently published a severe critique of Frost et al.'s (2006, Bull. Am. Mus. Nat. Hist. 297, 1–370) monographic study of amphibian systematics, concluding that it is “a disaster” and recommending that readers “simply ignore this study”. Beyond the hyperbole, Wiens raised four general objections that he regarded as “fatal flaws”: (1) the sampling design was insufficient for the generic changes made and taxonomic changes were made without including all type species; (2) the nuclear gene most commonly used in amphibian phylogenetics, RAG-1, was not included, nor were the morphological characters that had justified …


Sex-Specific Feeding Rates And Provisioning Of Fruit To Nestling Bell's Vireo, Greg H. Farley Jan 2008

Sex-Specific Feeding Rates And Provisioning Of Fruit To Nestling Bell's Vireo, Greg H. Farley

The Prairie Naturalist

Provisioning of fruit to nestlings and possible sex-specific differences in feeding rate have not been reported for Bell's vireo (Vireo bellii; Brown 1993). While studying nesting ecology of Bell's vireo on Konza Prairie Biological Station, Geary and Riley counties, Kansas, I quantified feeding rate by sex and food type delivered to nestlings. Sex was determined by capturing adults with mist-nets and inspecting for a cloacal protuberance, as well as conducting behavioral observations of uniquely-marked individuals. Males sing regularly while moving around territories, as well as during incubation (Nolan 1960). I assigned "female" to the individual in these socially …


Floristic Records In The Platte And Loup River Bottomlands Of Platte County, Nebraska, Michael P. Gutzmer, Robert B. Kaul Jan 2008

Floristic Records In The Platte And Loup River Bottomlands Of Platte County, Nebraska, Michael P. Gutzmer, Robert B. Kaul

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

A recent inventory of vascular plants in the Loup and Platte riverbottoms in Platte County has greatly increased knowledge of the area's flora. Of the 542 species of vascular plants now known to grow in the county, 289 were discovered after 1977, with more than 100 of those after 1990. 425 native and 117 naturalized species are known so far. Nearly 700 native and naturalized alien species are expected to occur in the county, based upon totals from nearby counties. Thus, almost 150 years after European settlement, more than 20% of the species remain unverified; of those, many are undoubtedly …


A Guide To The Tallgrass Prairies Of Eastern Nebraska And Adjacent States, Paul A. Johnsgard Dec 2007

A Guide To The Tallgrass Prairies Of Eastern Nebraska And Adjacent States, Paul A. Johnsgard

Papers in Ornithology

Contents

Part 1: Ecology of the Tallgrass Prairie

Part 2: Plants of the Tallgrass Prairies:
Checklist of Prairie & Grassland Plants of Nebraska; Relative Frequencies of Grasses, Spring Creek and Nine-mile Prairies; Twenty Most Abundant Fall Forbs, Spring Creek and Nine-mile Prairies; Typical Shrubs, Forbs, Grasses & Sedges of Eastern Nebraska Tallgrass Prairies; English: Latin Name Equivalents of 370 Tallgrass Prairie Plants; Latin: English Name Equivalents of 370 Tallgrass Prairie Plants Identification Keys to Some Common Nebraska Grassland Forbs

Part 3: Animals of the Tallgrass Prairies
Greater Prairie-chickens and Native Prairies; Seasonal Checklist of Nebraska Tallgrass Ecoregion Birds (Gage County); …


Endangered Species Bulletin: 2007 Highlights Dec 2007

Endangered Species Bulletin: 2007 Highlights

Endangered Species Bulletin

In this issue:
4 Measuring Recovery Success
6 Partnerships Can Conserve Species and a Way of Life
8 Rare Bird Nests Are Cause for Celebration
10 Jump Starting a Rabbit’s Recovery
11 Conserving a Natural Utah Treasure
12 New Hope for the Leon Springs Pupfish
14 Sometimes It’s the Little Things That Matter
16 Cooperative Conservation for the Page Springsnail
18 A Rare Plant Returns to San Francisco Bay
20 Fisheries and Habitat Conservation
22 Species Recovery Through Habitat and Resource Conservation
24 Fish and Wildlife Management Assistance
26 Partnerships for Shared Stewardship
28 The Environmental Contaminants Program
30 The …


Relative Effects Of Mammal Herbivory And Plant Spacing On Seedling Recruitment Following Fire And Mining, Michael H. Parsons, Christine M. Rafferty, Byron B. Lamont, Kenneth Dods, Meredith M. Fairbanks Oct 2007

Relative Effects Of Mammal Herbivory And Plant Spacing On Seedling Recruitment Following Fire And Mining, Michael H. Parsons, Christine M. Rafferty, Byron B. Lamont, Kenneth Dods, Meredith M. Fairbanks

Natural Resources Research Articles

No abstract provided.


Endangered Species Bulletin, September 2007 - Vol. Xxxii No. 3 Sep 2007

Endangered Species Bulletin, September 2007 - Vol. Xxxii No. 3

Endangered Species Bulletin

In this issue:
4 Measuring Recovery Success
6 Partnerships Can Conserve Species and a Way of Life
8 Rare Bird Nest is Cause for Celebration
10 Jump Starting a Rabbit’s Recovery
11 Conserving a Natural Utah Treasure
12 New Hope for the Leon Springs Pupfish
14 Sometimes It’s the Little Things that Matter
16 Cooperative Conservation for the Page Springsnail
18 A Rare Plant Returns to San Francisco Bay
20 Restoring Whooping Crane Habitat in Texas
22 Contaminants in Unexpected Places
24 Protecting and Restoring Marbled Murrelet Habitat
28 Sturgeon Conservation in the Russian Far East and China
33 Focus …


The Riparian Bio-Regions Of The Lower Rio Grande…And The Threats They Face From The Proposed Border Wall, Martin Hagne Sep 2007

The Riparian Bio-Regions Of The Lower Rio Grande…And The Threats They Face From The Proposed Border Wall, Martin Hagne

Border Wall / Border Security Documents

PDF of original PPT presentation created by Martin Hagne for the Valley Nature Center. The presentation includes regional maps, original photographs, and information on the diverse ecosystems of Starr, Hidalgo, and Cameron Counties, Texas.


Ranunculus Arvensis (Ranunculaceae), An Alien Weed New To Southern California, Richard E. Riefner Jr, Steve Boyd Jul 2007

Ranunculus Arvensis (Ranunculaceae), An Alien Weed New To Southern California, Richard E. Riefner Jr, Steve Boyd

Aliso: A Journal of Systematic and Floristic Botany

We report the first known records of Ranunculus arvensis from southern California. This alien species shows a tendency to behave as a facultative wetland plant, and could become a pest in scoured washes and flood plains, ephemeral pools, and on disturbed stream banks in the coastal lowlands.


Distribution Patterns Of Great Basin Conifers: Implications Of Extinction And Immigration, David A. Charlet Jul 2007

Distribution Patterns Of Great Basin Conifers: Implications Of Extinction And Immigration, David A. Charlet

Aliso: A Journal of Systematic and Floristic Botany

Factors influencing the distribution of scattered montane conifers on mountaintops in the Great Basin of North America were investigated. The sources of data were collections and observations on more than 300 mountain ranges in the region. All mountains in the region with at least one montane conifer species and all adjacent source areas were included in the data set. In all, 164 montane island sites and 40 mainland sites were used in the analyses. Physical data for each site were compiled and regression analyses were conducted to test the predictions of three island biogeography models: immigration, extinction, and equilibrium. These …


Vascular Plants Of The Whipple Mountains, Sarah J. De Groot Jul 2007

Vascular Plants Of The Whipple Mountains, Sarah J. De Groot

Aliso: A Journal of Systematic and Floristic Botany

The Sonoran and Mojave deserts meet just north of the Whipple Mountains, which are situated in southeast San Bernardino County, California, along the Colorado River and adjacent to Arizona. Vegetation from the Pleistocene to the present was inferred from previously published packrat midden data and the current floristic composition. Climate data suggest that summer rainfall is a factor underlying the vegetational differences between the western and eastern portions of the Sonoran desert. Plant collections in the area yielded primarily California Sonoran plants, but also several Mojave and Arizona Sonoran plants. A fair number of the Arizona Sonoran plants collected were …


Notes On Native Vascular Plants From Mima Mound-Vernal Pool Terrain And The Importance Of Preserving Coastal Terraces In Orange County, California, Richard E. Riefner Jr., Steve Boyd, Roy J. Shlemon Jul 2007

Notes On Native Vascular Plants From Mima Mound-Vernal Pool Terrain And The Importance Of Preserving Coastal Terraces In Orange County, California, Richard E. Riefner Jr., Steve Boyd, Roy J. Shlemon

Aliso: A Journal of Systematic and Floristic Botany

We report the following noteworthy collections of native vascular plants from mima mound fields in coastal Orange County, California: Deschampsia danthonioides, Lepidium strictum, and Sagina saginoides (new county records), Lepidium oblongum var. oblongum (previously excluded from the flora), Deinandra paniculata, Holocarpha virgata subsp. elongata, and Navarretia prostrata (new localities in the county), and Hordeum brachyantherum subsp. californicum (uncommon species of local interest). A herbarium study, preparation of voucher specimens, and a generalized distribution, facultative wetland status, and taxonomic notes, where appropriate, are cited for each taxon. An overview of the mima mound micro-relief associated with coastal …


Description Of The Tadpole Of Leptodactylus Pustulatus Peters, 1870 (Anura: Leptodactylidae), Rafael O. De Sá, Reuber Brandão, Lorena Dall'ara Guimarães Jul 2007

Description Of The Tadpole Of Leptodactylus Pustulatus Peters, 1870 (Anura: Leptodactylidae), Rafael O. De Sá, Reuber Brandão, Lorena Dall'ara Guimarães

Biology Faculty Publications

The external morphology and oral disc of the tadpole of Leptodactylus pustulatus Peters, 1870, are described and illustrated for Gosner stage 39. The internal oral anatomy was analyzed with SEM at Gosner stage 36 whereas chondrocranial anatomy is reported for Gosner stage 35. The overall characteristics do not depart from those known for the genus Leptodactylus and they particularly agree for those of the melanonotus species group. The labial tooth row formula is 2(2)/3. Observations are presented that suggest that L. pustulatus engages in larval parental care.

Resumo

São descritas a morfologia externa e o disco oral do girino de …


Assessing Causes Of Change In The Freshwater Mussels (Bivalvia: Unionidae) In The Black River, Ohio, Mark S. Lyons, Robert A. Krebs, Jeremy P. Holt, Louie J. Rundo, W. Zawiski Jul 2007

Assessing Causes Of Change In The Freshwater Mussels (Bivalvia: Unionidae) In The Black River, Ohio, Mark S. Lyons, Robert A. Krebs, Jeremy P. Holt, Louie J. Rundo, W. Zawiski

Biological, Geological, and Environmental Faculty Publications

Habitat destruction is believed to be the number one cause of the decline in unionid mussels. Around the world, cities, towns and agriculture alter the structure of watersheds, and the Black River in Ohio may be a typical example. We investigated the diversity and abundance of unionid mussels in this watershed and compared results to urbanization locations, to site-specific appearance of the habitat and to a 1997 fish survey, as host species are another factor important to the distribution of unionid mussels. Although shells were found for 21 species, only 11 of these species were found alive. Seven of the …


Wpa News 79 (2007), World Pheasant Association Jul 2007

Wpa News 79 (2007), World Pheasant Association

Galliformes Specialist Group and Affiliated Societies: Newsletters

WPA News (Summer 2007), number 79

Published by the World Pheasant Association