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Find out more about Biological Threat and Invasive Species Research through our publications.

Filter Total Items: 305

Assessing threats from coral and crustose coralline algae disease on the reefs of New Caledonia

The present study reports the results of the first quantitative survey of lesions on coral and crustose coralline algae (CCA) on reefs in the lagoon of New Caledonia. Surveys on inshore and offshore reefs were conducted at 13 sites in 2010, with 12 sites resurveyed in 2013. Thirty coral diseases affecting 15 coral genera were found, with low overall disease prevalence (<1%). This study extends the
Authors
Greta S. Aeby, Aline Tribollet, Gregory Lasne, Thierry M. Work

Movement analysis of free-grazing domestic ducks in Poyang Lake, China: A disease connection

Previous work suggests domestic poultry are important contributors to the emergence and transmission of highly pathogenic avian influenza throughout Asia. In Poyang Lake, China, domestic duck production cycles are synchronized with arrival and departure of thousands of migratory wild birds in the area. During these periods, high densities of juvenile domestic ducks are in close proximity to migrat
Authors
Diann J. Prosser, Eric C. Palm, John Y. Takekawa, Delong Zhao, Xiangming Xiao, Peng Li, Ying Liu, Scott H. Newman

Up in arms: Immune and nervous system response to sea star wasting disease

Echinoderms, positioned taxonomically at the base of deuterostomes, provide an important system for the study of the evolution of the immune system. However, there is little known about the cellular components and genes associated with echinoderm immunity. The 2013–2014 sea star wasting disease outbreak is an emergent, rapidly spreading disease, which has led to large population declines of astero
Authors
Lauren E Fuess, Morgan E. Eiselord, Collin J. Closek, Allison M. Tracy, Ruth Mauntz, Sarah Gignoux-Wolfsohn, Monica M Moritsch, Reyn Yoshioka, Colleen A. Burge, Drew Harvell, Carolyn S. Friedman, Paul K. Hershberger, Steven B. Roberts

Stable isotopes suggest low site fidelity in Bar-Headed Geese (Anser indicus) in Mongolia: Implications for disease transmission

Population connectivity is an important consideration in studies of disease transmission and biological conservation, especially with regard to migratory species. Determining how and when different subpopulations intermingle during different phases of the annual cycle can help identify important geographical regions or features as targets for conservation efforts and can help inform our understand
Authors
Eli S. Bridge, Jeffrey F. Kelly, Xiangming Xiao, Nyambayar Batbayar, Tseveenmyadag Natsagdorj, Nichola J. Hill, John Y. Takekawa, Lucy A. Hawkes, Charles M. Bishop, Patrick J. Butler, Scott H. Newman

Determination of the acute toxicity of isoniazid to three invasive carp species and rainbow trout in static exposures

Three invasive fishes of considerable concern to aquatic resource managers are the Hypophthalmichthys nobilis (bighead carp),Hypophthalmichthys molitrix (silver carp), and Ctenopharyngodon idella (grass carp), collectively known as Asian carps. There is a need for an effective chemical control agent for Asian carps. Isoniazid was identified as a potential toxicant for grass carp. The selective tox
Authors
Theresa M. Schreier, Terrance D. Hubert

TaqMan real-time polymerase chain reaction for detection of Ophidiomyces ophiodiicola, the fungus associated with snake fungal disease

Background Fungal skin infections associated with Ophidiomyces ophiodiicola, a member of the Chrysosporiumanamorph of Nannizziopsis vriesii (CANV) complex, have been linked to an increasing number of cases of snake fungal disease (SFD) in captive snakes around the world and in wild snake populations in eastern North America. The emergence of SFD in both captive and wild situations has led to an i
Authors
Elizabeth A. Bohuski, Jeffrey M. Lorch, Kathryn M. Griffin, David S. Blehert

Embryonic and larval development and early behavior in grass carp, Ctenopharyngodon idella: implications for recruitment in rivers

With recent findings of grass carp Ctenopharyngodon idella in tributaries of the Great Lakes, information on developmental rate and larval behavior is critical to efforts to assess the potential for establishment within the tributaries of that region. In laboratory experiments, grass carp were spawned and eggs and larvae reared at two temperature treatments, one "cold" and one "warm", and tracked
Authors
Amy E. George, Duane Chapman

State-space modeling to support management of brucellosis in the Yellowstone bison population

The bison (Bison bison) of the Yellowstone ecosystem, USA, exemplify the difficulty of conserving large mammals that migrate across the boundaries of conservation areas. Bison are infected with brucellosis (Brucella abortus) and their seasonal movements can expose livestock to infection. Yellowstone National Park has embarked on a program of adaptive management of bison, which requires a model tha
Authors
N. Thompson Hobbs, Chris Geremia, John Treanor, Rick Wallen, P.J. White, Mevin Hooten, Jack C. Rhyan

Brumation of introduced Black and White Tegus, Tupinambis merianae (Squamata: Teiidae), in southern Florida

An established population of Tupinambis merianae (Black and White Tegu) in southeastern Florida threatens the Everglades ecosystem. Understanding the behavioral ecology of Black and White Tegus could aid in management and control plans. Black and White Tegus are seasonally active and brumate during the winter in their native range, but brumation behavior is largely unstudied in either the native o
Authors
Michelle McEachern, Amy A. Yackel Adams, Page E. Klug, Lee A. Fitzgerald, Robert N. Reed

Instream habitat restoration and stream temperature reduction in a whirling disease-positive Spring Creek in the Blackfoot River Basin, Montana

Anthropogenic warming of stream temperature and the presence of exotic diseases such as whirling disease are both contemporary threats to coldwater salmonids across western North America. We examined stream temperature reduction over a 15-year prerestoration and postrestoration period and the severity of Myxobolus cerebralisinfection (agent of whirling disease) over a 7-year prerestoration and pos
Authors
Ron Pierce, Craig Podner, Laurie B Marczak, Leslie A. Jones

Distance to human populations influences epidemiology of respiratory disease in desert tortoises

We explored variables likely to affect health of Agassiz's desert tortoises (Gopherus agassizii) in a 1,183-km2 study area in the central Mojave Desert of California between 2005 and 2008. We evaluated 1,004 tortoises for prevalence and spatial distribution of 2 pathogens, Mycoplasma agassizii and M. testudineum, that cause upper respiratory tract disease. We defined tortoises as test-positive if
Authors
Kristin H. Berry, no longer USGS Ashley A. Coble (formerly Emerson), Julie L. Yee, Jeremy S. Mack, William M. Perry, Kemp M. Anderson, Mary B. Brown

Disease dynamics during wildlife translocations: disruptions to the host population and potential consequences for transmission in desert tortoise contact networks

Wildlife managers consider animal translocation a means of increasing the viability of a local population. However, augmentation may disrupt existing resident disease dynamics and initiate an outbreak that would effectively offset any advantages the translocation may have achieved. This paper examines fundamental concepts of disease ecology and identifies the conditions that will increase the like
Authors
Christina M. Aiello, Kenneth E. Nussear, Andrew D. Walde, Todd C. Esque, Patrick G. Emblidge, Pratha Sah, S. Bansal, Peter J. Hudson