The effect of short-term food restriction on the metabolic cost of the acute phase response in the fish-eating Myotis (Myotis vivesi) |
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| Institution: | 1. Posgrado en Ciencias Biológicas, Instituto de Biología, Universidad Nacional Autónoma de México, Circuito Exterior s/n, Ciudad Universitaria, México D.F., 04510, Mexico;2. Estación de Biología Chamela, Instituto de Biología, Universidad Nacional Autónoma de México, Apartado Postal 21, San Patricio, Jalisco, 48980, Mexico;3. Laboratorio de Sistemas de Información Geográfica, Departamento de Zoología, Instituto de Biología, Universidad Nacional Autónoma de México, Circuito Exterior s/n, Ciudad Universitaria, México D.F., 04510, Mexico;4. Department of Biological Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario, M1C 1A4, Canada;1. Laboratoire de Biométrie et Biologie Evolutive, UMR 5558, CNRS, Université Lyon 1, Université de Lyon, F-69622, Villeurbanne, France;2. Department of Life and Environmental Sciences, Faculty of Science and Technology, Bournemouth University, Christchurch House, Talbot Campus, Poole, Dorset, BH12 5BB, United Kingdom;3. Centre de Biologie et Gestion des Populations (INRA ? IRD ? Cirad ? Montpellier SupAgro), Campus international de Baillarguet, CS 30016, F-34988, Montferrier-sur-Lez Cedex, France;1. South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center, Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Zhuhai Key Laboratory of Marine Bioresource and Environment, School of Marine Sciences, Sun Yat-Sen University, Guangzhou, 510275, PR China;2. The Swire Institute of Marine Science and School of Biological Sciences, The University of Hong Kong, Hong Kong;3. Cetacean Ecology Lab, Cetacea Research Institute, Hong Kong;1. Department of Biology & CESAM, University of Aveiro, Aveiro, Portugal;2. Servei d’Ecopatologia de Fauna Salvatge (SEFaS), Departament de Medicina i Cirurgia Animals, Universitat Autònoma de Barcelona, Bellaterra, Barcelona, Spain;3. Departamento de Biología Animal, Biología Vegetal y Ecología, Universidad de Jaén, Campus Las Lagunillas, Jaén, Spain;4. Agencia de Medio Ambiente y Agua, Isla de la Cartuja, Sevilla, Spain;5. Direcció General de Medi Ambient i Biodiversitat, Depto. de Agricultura, Ramadería, Pesca i Alimentació, Generalitat de Catalunya, Barcelona, Spain;6. Reserva Nacional de Caça dels Ports de Tortosa i Beseit, Roquetes, Tarragona, Spain;7. Institute of Zoology, Zoological Society of London, Regent’s Park, London, United Kingdom;1. Institute of Evolutionary Ecology and Conservation Genomics, Albert-Einstein Allee 11, D-89069 Ulm, Germany;2. Instituto de Ecología, Universidad Nacional Autónoma de México, Tercer Circuito s/n, Ciudad Universitaria, 04318 Ciudad de México, Mexico;3. Institute of Neural Information Processing, University of Ulm, Albert-Einstein Allee 11, D-89069 Ulm, Germany;4. Smithsonian Tropical Research Institute, PO Box 0843-03092, Balboa, Panama |
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| Abstract: | Food restriction affects the activation of the immune system although the metabolic cost associated with mounting such a response has rarely been examined except in model animals. Wild animals are constantly exposed to variations in the availability of food resources and they need to balance their energy budget to fight against pathogens. We examined the effect of food restriction in the fish eating Myotis (Myotis vivesi), a species of bat that experiences periods in which foraging is limited due to ambient conditions. We tested the hypothesis that acute food restriction (～65% restriction for 1 night) would reduce the caloric response to lipopolysaccharidae (LPS) injection compared to bats fed ad libitum. We also measured a proxy for body temperature (Tskin) and expected reduced fever development when food intake was limited. Bats on the restricted diet had similar resting metabolic rate, total caloric cost and Tskin after the LPS challenge than when fed ad libitum. However, there was a delay in the metabolic and pyrogenic responses when bats were on the restricted diet. The effect of acute food restriction in delaying the hyperthermia development in fish eating Myotis might be of importance for its capacity to fight pathogens. Similar to other bats, the fish eating Myotis can fast for several consecutive days by entering torpor and future work is warranted to understand the effect of long periods of food restriction on bat immune response. |
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| Keywords: | Caloric cost Food restriction Innate immune response Lipopolysaccharidae Resting metabolic rate |
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