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Full-Text Articles in Life Sciences
Evidence Suggesting That Ivory-Billed Woodpeckers (Campephilus Principalis) Exist In Florida, Geoffrey E. Hill, Daniel J. Mennill, Brian W. Rolek, Tyler L. Hicks, Kyle A. Swiston
Evidence Suggesting That Ivory-Billed Woodpeckers (Campephilus Principalis) Exist In Florida, Geoffrey E. Hill, Daniel J. Mennill, Brian W. Rolek, Tyler L. Hicks, Kyle A. Swiston
Biological Sciences Publications
The Ivory-billed Woodpecker (Campephilus principalis) disappeared from the forests of southeastern North America in the early 20th Century and for more than 50 years has been widely considered extinct. On 21 May 2005, we detected a bird that we identified as an Ivory-billed Woodpecker in the mature swamp forest along the Choctawhatchee River in the panhandle of Florida. During a subsequent year of research, members of our small search team observed birds that we identified as Ivory-billed Woodpeckers on 14 occasions. We heard sounds that matched descriptions of Ivory-billed Woodpecker acoustic signals on 41 occasions. We recorded 99 putative double …
Plasma-Binding Globulins And Acute Stress Response, C. W. Breuner, S. E. Lynn, G. E. Julian, J. M. Cornelius, B. J. Heidinger, O. P. Love, R. S. Sprague, H. Wada, B. A. Whitman
Plasma-Binding Globulins And Acute Stress Response, C. W. Breuner, S. E. Lynn, G. E. Julian, J. M. Cornelius, B. J. Heidinger, O. P. Love, R. S. Sprague, H. Wada, B. A. Whitman
Integrative Biology Publications
Within studies of acute stress physiology an increase in glucocorticoid secretion is thought to be the primary mediator of tissue response to stress. Corticosteroid-binding globulin may regulate tissue availability of steroids, but has not been considered a dynamic component of the acute stress response. Here, we examined CBG level over the common 60-minute time frame in an acute capture and handling protocol to investigate whether CBG capacity is dynamic or static over short stressors. Using a comparative approach, we measured CBG response to capture and handling stress in nine species of birds, representing five orders and nine families. CBG capacity …
Wheat Est Resources For Functional Genomics Of Abiotic Stress, Mario Houde, Mahdi Belcaid, François Ouellet, Jean Danyluk, Antonio F. Monroy, Ani Dryanova, Patrick Gulick, Anne Bergeron, André Laroche, Matthew G. Links, Luke Maccarthy, William L. Crosby, Fathey Sarhan
Wheat Est Resources For Functional Genomics Of Abiotic Stress, Mario Houde, Mahdi Belcaid, François Ouellet, Jean Danyluk, Antonio F. Monroy, Ani Dryanova, Patrick Gulick, Anne Bergeron, André Laroche, Matthew G. Links, Luke Maccarthy, William L. Crosby, Fathey Sarhan
Biological Sciences Publications
Wheat is an excellent species to study freezing tolerance and other abiotic stresses. However, the sequence of the wheat genome has not been completely characterized due to its complexity and large size. To circumvent this obstacle and identify genes involved in cold acclimation and associated stresses, a large scale EST sequencing approach was undertaken by the Functional Genomics of Abiotic Stress (FGAS) project.
Accuracy Of An Acoustic Location System For Monitoring The Position Of Duetting Songbirds In Tropical Forest, Daniel J. Mennill, John M. Burt, Kurt M. Fristrup, Sandra L. Vehrencamp
Accuracy Of An Acoustic Location System For Monitoring The Position Of Duetting Songbirds In Tropical Forest, Daniel J. Mennill, John M. Burt, Kurt M. Fristrup, Sandra L. Vehrencamp
Biological Sciences Publications
A field test was conducted on the accuracy of an eight-microphone acoustic location system designed to triangulate the position of duetting rufous-and-white wrens (Thryothorus rufalbus) in Costa Rica's humid evergreen forest. Eight microphones were set up in the breeding territories of 20 pairs of wrens, with an average intermicrophone distance of 75.2±2.6 m. The array of microphones was used to record antiphonal duets broadcast through stereo loudspeakers. The positions of the loudspeakers were then estimated by evaluating the delay with which the eight microphones recorded the broadcast sounds. Position estimates were compared to coordinates surveyed with a global-positioning system (GPS). …
Biological Invasions: Recommendations For U.S. Policy And Management, David M. Lodge, Susan Williams, Hugh J. Macisaac, Keith R. Hayes, Brian Leung, Sarah Reichard, Richard N. Mack, Peter B. Moyle, Maggie Smith, David A. Andow, James T. Carlton, Anthony Mcmichael
Biological Invasions: Recommendations For U.S. Policy And Management, David M. Lodge, Susan Williams, Hugh J. Macisaac, Keith R. Hayes, Brian Leung, Sarah Reichard, Richard N. Mack, Peter B. Moyle, Maggie Smith, David A. Andow, James T. Carlton, Anthony Mcmichael
Biological Sciences Publications
The Ecological Society of America has evaluated current U.S. national policies and practices on biological invasions in light of current scientific knowledge. Invasions by harmful nonnative species are increasing in number and area affected; the damages to ecosystems, economic activity, and human welfare are accumulating. Without improved strategies based on recent scientific advances and increased investments to counter invasions, harm from invasive species is likely to accelerate. Federal leadership, with the cooperation of state and local governments, is required to increase the effectiveness of prevention of invasions, detect and respond quickly to new potentially harmful invasions, control and slow the …
Evidence Of Small-Scale Vicariance In Caridina Lanceolata (Decapoda: Atyidae) From The Malili Lakes, Sulawesi, Denis Roy, David W. Kelly, Charles H.J.M. Fransen, Daniel D. Heath, G. Douglas Haffner
Evidence Of Small-Scale Vicariance In Caridina Lanceolata (Decapoda: Atyidae) From The Malili Lakes, Sulawesi, Denis Roy, David W. Kelly, Charles H.J.M. Fransen, Daniel D. Heath, G. Douglas Haffner
Biological Sciences Publications
No abstract provided.
Invasion Risk Of Active And Diapausing Invertebrates From Residual Ballast In Ships Entering Chesapeake Bay, Ian C. Duggan, Sarah A. Bailey, Colin D.A. Van Overdijk, Hugh J. Macisaac
Invasion Risk Of Active And Diapausing Invertebrates From Residual Ballast In Ships Entering Chesapeake Bay, Ian C. Duggan, Sarah A. Bailey, Colin D.A. Van Overdijk, Hugh J. Macisaac
Biological Sciences Publications
ABSTRACT: We examined the invasion risk posed by active invertebrates and their diapausing stages (e.g. resting eggs, quiescent adults) carried in residual sediment and water of non-ballasted ships to Chesapeake Bay. Many taxa were recorded that are not native to Chesapeake Bay, supporting the contention that residual ballast represents an invasion vector of some risk to marine systems. Composition and propagule supply differed relative to that in ships entering the Laurentian Great Lakes (e.g. marine taxa dominated in Chesapeake Bay ships), indicating that risk varies geographically. Average abundances of active invertebrates in residual sediment (1002.1 ind. kg–1) and water (2.7 …
Iridescent Plumage In Satin Bowerbirds: Structure, Mechanisms And Nanostructural Predictors Of Individual Variation In Colour, Stéphanie M. Doucet, Matthew D. Shawkey, Geoffrey E. Hill, Robert Montgomerie
Iridescent Plumage In Satin Bowerbirds: Structure, Mechanisms And Nanostructural Predictors Of Individual Variation In Colour, Stéphanie M. Doucet, Matthew D. Shawkey, Geoffrey E. Hill, Robert Montgomerie
Biological Sciences Publications
Skip to Next Section Iridescence is produced by coherent scattering of light waves from alternating layers of materials of different refractive indices. In birds, iridescent colours are produced by feather barbules when light is scattered from alternating layers of keratin, melanin and air. The structure and organization of these layers, and hence the appearance of bird species with different types of plumage iridescence, varies extensively. One principal distinction between different types of iridescent colours is whether they are produced by a single pair of layers or by multiple pairs of layers. Multi-layer iridescence, such as that displayed by hummingbirds, has …
Plasma-Binding Globulins And Acute Stress Response, C. W. Breuner, S. E. Lynn, G. E. Julian, J. M. Cornelius, B. J. Heidinger, O. P. Love, R. S. Sprague, H. Wada, B. A. Whitman
Plasma-Binding Globulins And Acute Stress Response, C. W. Breuner, S. E. Lynn, G. E. Julian, J. M. Cornelius, B. J. Heidinger, O. P. Love, R. S. Sprague, H. Wada, B. A. Whitman
Biological Sciences Publications
No abstract provided.
Whip It Good! Geographic Consistency In Male Songs And Variability In Female Songs Of The Duetting Eastern Whipbird Psophodes Olivaceus, Daniel J. Mennill, Amy C. Rogers
Whip It Good! Geographic Consistency In Male Songs And Variability In Female Songs Of The Duetting Eastern Whipbird Psophodes Olivaceus, Daniel J. Mennill, Amy C. Rogers
Biological Sciences Publications
Geographic variation in male bird songs has been studied extensively, but there have been few investigations of geographic variation in female songs or sex differences in patterns of geographic variation. We compared patterns of variation in male and female songs of eastern whipbirds Psophodes olivaceus by analyzing recordings from 16 populations across the species’ geographic range in eastern Australia. We found remarkably different patterns of geographic variation between the sexes. Female eastern whipbird songs are easily categorized into discrete song types. Song types are shared between nearby females, but female songs show pronounced differences at a continental scale. In contrast, …
Conservation Of Pitx1 Expression During Amphibian Limb Morphogenesis, Wy Chang, Farhad Khosrowshahian, Marian Wolanski, R Marshall
Conservation Of Pitx1 Expression During Amphibian Limb Morphogenesis, Wy Chang, Farhad Khosrowshahian, Marian Wolanski, R Marshall
Biological Sciences Publications
In contrast to the pattern of limb emergence in mammals, chicks, and the newt N. viridescens, embryos such as Xenopus laevis and Eleutherodactylus coqui initiate pelvic limb buds before they develop pectoral ones. We studied the expression of Pitx1 in X. laevis and E. coqui to determine if this paired-like homeodomain transcription factor directs differentiation specifically of the hindlinib, or if it directs the second pair of limbs to form, namely the forelimbs. We also undertook to determine if embryonic expression patterns were recapitulated during the regeneration of an amputated limb bud. Pitx1 is expressed in hindlimbs in both X. …
Cathepsin B Localizes To Plasma Membrane Caveolae Of Differentiating Myoblasts And Is Secreted In An Active Form At Physiological Ph, Derek T. Jane, Les Morvay, Luis Dasilva, Dora Cavallo-Medved, Bonnie F. Sloane, Michael J. Dufresne
Cathepsin B Localizes To Plasma Membrane Caveolae Of Differentiating Myoblasts And Is Secreted In An Active Form At Physiological Ph, Derek T. Jane, Les Morvay, Luis Dasilva, Dora Cavallo-Medved, Bonnie F. Sloane, Michael J. Dufresne
Biological Sciences Publications
Our in vitro studies support a functional link between the induction of cathepsin B gene expression and the catabolic restructuring associated with myotube formation during myogenesis in vivo. We have tested two predictions that are basic to this hypothesis: (1) that active cathepsin B is localized to plasma membrane caveolae of fusing myoblasts; and (2) that active cathepsin B is secreted from fusing myoblasts at physiological pH. During differentiation, L6 rat myoblasts demonstrated a fusion-related increase in activity associated with the 25/26-kDa, fully processed, active form of cathepsin B. Immunocytochemical studies demonstrated a redistribution of lysosomal cathepsin B protein toward …