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Articles 121 - 123 of 123
Full-Text Articles in Social and Behavioral Sciences
Low Intensity Blood Parasite Infections Do Not Reduce The Aerobic Performance Of Migratory Birds, Steffen Hahn, Silke Bauer, Dimitar Dimitrov, Tamara Emmenegger, Karina Ivanova, Pavel Zehtindjiev, William A. Buttemer
Low Intensity Blood Parasite Infections Do Not Reduce The Aerobic Performance Of Migratory Birds, Steffen Hahn, Silke Bauer, Dimitar Dimitrov, Tamara Emmenegger, Karina Ivanova, Pavel Zehtindjiev, William A. Buttemer
Faculty of Science, Medicine and Health - Papers: part A
Blood parasites (Haemosporidia) are thought to impair the flight performance of infected animals, and therefore, infected birds are expected to differ from their non-infected counterparts in migratory capacity. Since haemosporidians invade host erythrocytes, it is commonly assumed that infected individuals will have compromised aerobic capacity, but this has not been examined in free-living birds. We tested if haemosporidian infections affect aerobic performance by examining metabolic rates and exercise endurance in migratory great reed warblers (Acrocephalus arundinaceus) experimentally treated with Plasmodium relictum pGRW04 and in naturally infected wild birds over consecutive life-history stages. We found no effect of acute or chronic …
Parasite Metacommunities: Evaluating The Roles Of Host Community Composition And Environmental Gradients In Structuring Symbiont Communities Within Amphibians, Joseph Mihaljevic, Bethany J. Hoye, Pieter Johnson
Parasite Metacommunities: Evaluating The Roles Of Host Community Composition And Environmental Gradients In Structuring Symbiont Communities Within Amphibians, Joseph Mihaljevic, Bethany J. Hoye, Pieter Johnson
Faculty of Science, Medicine and Health - Papers: part A
Ecologists increasingly report the structures of metacommunities for free-living species, yet far less is known about the composition of symbiont communities through space and time. Understanding the drivers of symbiont community patterns has implications ranging from emerging infectious disease to managing host microbiomes. Using symbiont communities from amphibian hosts sampled from wetlands of California, USA, we quantified the effects of spatial structure, habitat filtering and host community components on symbiont occupancy and overall metacommunity structure. We built upon a statistical method to describe metacommunity structure that accounts for imperfect detection in survey data-detection error-corrected elements of metacommunity structure-by adding an …
Comparative Copper Sensitivity Between Life Stages Of Common Subantarctic Marine Invertebrates, Jessica Holan, Catherine K. King, Andrew R. Davis
Comparative Copper Sensitivity Between Life Stages Of Common Subantarctic Marine Invertebrates, Jessica Holan, Catherine K. King, Andrew R. Davis
Faculty of Science, Medicine and Health - Papers: part A
The development of environmental guidelines in the Antarctic and subantarctic is essential, because expansion of research, tourism, and fishing is placing these regions at increasing risk of contamination. Data are currently insufficient to create the region-specific guidelines needed for the unique conditions in these areas. To develop the most appropriate environmental guidelines, data from the most sensitive life stages of a species should be included to ensure effective protection throughout its life cycle. It is generally accepted that early life stages are more sensitive to contaminants. We compared the toxicity of copper between juvenile and adult life stages of 4 …