Life Sciences Commons^™

Competition Between Marine Mammals And Fisheries: Food For Thought, Kristin Kaschner, Daniel Pauly

State of the Animals 2005

Marine mammals and humans have co-existed on this planet for several hundred thousand years. Both rely heavily on the exploitation of marine resources, though whales, dolphins, and pinnipeds have been doing so for much longer, roaming the oceans for millions of years, long before the emergence of modern humans (Hoelzel 2002). It is not surprising that, when there is a “new kid on the block,” co-existence is not always very peaceful, and many of the encounters between humans and marine mammals result in a variety of conflicts.

Landscape Ecology Of Birds On Mount Leconte, Great Smoky Mountains National Park, Andreas P. Damalas

Biological Sciences Theses & Dissertations

Landbirds form a significant component of wildlife resources in the Great Smoky Mountains National Park. The present study explored how forest structure and composition of deciduous-coniferous ecotones influenced diversity, richness, and relative abundance of bird species and how bird species responded to the spruce-fir community.

Using a form of the variable-circular plot method, I conducted audio-visual censuses of diurnal birds on Mount LeConte. I established 212 geo-referenced census points on six trails, which were used as gradient-oriented transects (gradsects). I measured habitat characteristics at the same census points. I used forest community types for each point on gradsects to delineate …

Presence And Colonization Of Placobdella On Two Species Of Freshwater Turtles (Graptemys Geographica And Sternotherus Odoratus), Travis Ryan

Travis J. Ryan

It is generally accepted that bottom-dwelling turtles have a higher ectoparasite load than turtles that bask aerially because of effects of desiccation on ectoparasites, especially with regard to leeches. We compared number of leeches (primarily Placobdella parasitica) on field-caught Common Musk Turtles (Stemotherus odoratus) and Common Map Turtles (Graptemys geographica). The bottom-dwelling species S. odoratus had more than 20 times the number of leeches than the aerial-basking species G. geographica. We then exposed cleaned (leech-free) turtles to leeches in mesocosms (cattle tanks) to measure the rate of colonization. In this experiment, S. odoratus had more than four times the number …

The Atlas Mountains, Not The Strait Of Gibraltar, As A Biogeographic Barrier For Mauremys Leprosa (Reptilia: Testudines), Edgar Lehr, Uwe Fritz, Guido Fritzsch, Jean-Marc Ducotterd, Anke Muller

Edgar Lehr

Sequence data of the mitochondrial cytochrome b gene of stripe-necked terrapins (Mauremys leprosa) have been compared from localities north and south of the Atlas Mts . (Ceuta; Morocco) and from Donana National Park (Spain). A low maximum sequence divergence (approximately I %) corresponds to two major clades; one is re presented by localities to the north of the Atlas Mts. and in Dofiana National Park and the other by localities to the south of the Atlas Mts. Differentiation between populations north and south of the Atlas Mts. is much more pronounced than that found between samples from each side of …

Resurrection Of The Stenocercus Torquatus Boulenger, A Spiny-Tailed Iguanid Lizard (Squamata: Iguania) From Peru, Edgar Lehr, Mikael Lundberg, Omar Torres-Carvajal

Edgar Lehr

We resurrect and redescribe Stenocercus torquatus from the Andes of central Peru in departamentos JUnln and Pasco at elevations between 800 and 1800 m. This species was erroneously synonymized with Stenocercus crassicaudatus, which occurs allopatrically in the Andes of southeastern Peru, departamento Cusco. In addition to several scale counts, Stenocercus torquatus differs from S. crassicaudatus in having a black antehumeral collar, two black transverse bands anterior to the antehumeral collar, a shorter tail, the ability to change color, and an arboreal life-style.

Effects Of Urbanization On The Distribution And Abundance Of Amphibians And Invasive Species In Southern California Streams, Seth Riley, Gary Busteed, Lee Kats, Thomas Vandergon, Lena Lee, Rosi Dagit, Jacob Kerby, Robert Fisher, Raymond Sauvajot

Lee Kats

Urbanization negatively affects natural ecosystems in many ways, and aquatic systems in particular. Urbanization is also cited as one of the potential contributors to recent dramatic declines in amphibian populations. From 2000 to 2002 we determined the distribution and abundance of native amphibians and ex- otic predators and characterized stream habitat and invertebrate communities in 35 streams in an urbanized landscape north of Los Angeles (U.S.A.). We measured watershed development as the percentage of area within each watershed occupied by urban land uses. Streams in more developed watersheds often had exotic crayfish ( Procambarus clarkii) and fish, and had fewer …

Microbial Diversity In Hot Spring Cyanobacterial Mats: Pattern And Prediction, Frederick M. Cohan, D. M. Ward

Frederick M. Cohan

No abstract provided.

Genetic Variation And Migration In The Mexican Free-Tailed Bat (Tadarida Brasiliensis Mexicana), Amy L. Russell, R. A. Medellín, G. F. Mccracken

Amy L. Russell

Which Species Concept For Bacteria?—An E-Debate, S. Godreuil, Frederick M. Cohan, H. Shah, M. Tibayrenc

Frederick M. Cohan

No abstract provided.

Seedling Survival And Growth Of Three Native Species In Pastures: Implications For Dry Forest Rehabilitation, Heather P. Griscom, P.M.S. Ashton, G.P. Berlyn

Heather P. Griscom

No abstract provided.

Bearing The Costs Of Human-Wildlife Conflict: The Challenges Of Compensation Schemes, Philip J. Nyhus, Steve A. Osofsky, Paul Ferraro, H Fischer, Francine Madden

Philip J. Nyhus

No abstract provided.

Conservation And Development Interventions At The Wildlife-Livestock Interface, Steven A. Osofsky, Sarah Cleaveland, William B. Karesh, Michael D. Kock, Philip J. Nyhus, Lisa Starr, Angela Yang

Philip J. Nyhus

No abstract provided.

Darwinisms’S Multiple Ontologies, David J. Depew

David J Depew

No abstract provided.

Classical Conditioning Of Red-Backed Salamanders, Plethodon Cinereus, Scott Kight

Scott Kight