caa a22 4500 469097809 CHVBK 20180323133036.0 cr unu---uuuuu 170328e19921001xx s 000 0 eng 10.1007/BF00650322 doi (NATIONALLICENCE)springer-10.1007/BF00650322 Individual and population energetics of a lizard on a Mediterranean islet [Elektronische Daten] [Richard Brown, V. Pérez-Mellado, J. Diego-Rasilla, J. Garcia, A. Naranjo, J. Speakman] Summary: Population density in the lacertid lizardPodarcis lilfordi on the Mediterranean islet of Nitge, Menorca, Balearic Islands, was found to be 12 190 ind · ha-1 (SE, ±2135), exceeding densities reported for other island or mainland lizard populations. Field metabolic rates inP. lilfordi were measured by the doubly labeled water method, allowing estimation of a population metabolizable energy demand of 13.86 MJ · ha-1 · day-1-only 9.8% of that for a theoretical mammal population of the same body mass and density. Energy demand was considerably higher than that estimated for other lizard populations, primarily due to high population density but also because of high individual daily energy expenditure (1255 KJ · day-1; body mass=5.13 g). Field metabolic rates were partitioned into maintenance and activity components by respirometry of captive animals at field body temperatures. Activity metabolism formed the main component (77.4%) of total respiratory metabolism resulting from a combination of long daily activity periods (ca. 12 h), and greatly elevated metabolism during activity (5.7 times greater than resting levels). It is hypothesized that low food availability per individual constrains the time-energy budget of this species, obligating long periods of intense foraging. Springer-Verlag, 1992 Balearic islands nationallicence Energy expenditure nationallicence Islet nationallicence Lizard nationallicence Population density nationallicence Brown Richard Departamento de Biología Animal, Facultad de Biología, Universidad de Salamanca, 37071, Salamanca, Spain aut Pérez-Mellado V. Departamento de Biología Animal, Facultad de Biología, Universidad de Salamanca, 37071, Salamanca, Spain aut Diego-Rasilla J. Departamento de Biología Animal, Facultad de Biología, Universidad de Salamanca, 37071, Salamanca, Spain aut Garcia J. Departamento de Biología Animal, Facultad de Biología, Universidad de Salamanca, 37071, Salamanca, Spain aut Naranjo A. Departamento de Biología Animal, Facultad de Biología, Universidad de Salamanca, 37071, Salamanca, Spain aut Speakman J. Department of Zoology, University of Aberdeen, AB9 2TN, Aberdeen, UK aut Oecologia Springer-Verlag 91/4(1992-10-01), 500-504 0029-8549 91:4<500 1992 91 442 https://doi.org/10.1007/BF00650322 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00650322 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Brown Richard Departamento de Biología Animal, Facultad de Biología, Universidad de Salamanca, 37071, Salamanca, Spain aut NATIONALLICENCE 700 1- Pérez-Mellado V. Departamento de Biología Animal, Facultad de Biología, Universidad de Salamanca, 37071, Salamanca, Spain aut NATIONALLICENCE 700 1- Diego-Rasilla J. Departamento de Biología Animal, Facultad de Biología, Universidad de Salamanca, 37071, Salamanca, Spain aut NATIONALLICENCE 700 1- Garcia J. Departamento de Biología Animal, Facultad de Biología, Universidad de Salamanca, 37071, Salamanca, Spain aut NATIONALLICENCE 700 1- Naranjo A. Departamento de Biología Animal, Facultad de Biología, Universidad de Salamanca, 37071, Salamanca, Spain aut NATIONALLICENCE 700 1- Speakman J. Department of Zoology, University of Aberdeen, AB9 2TN, Aberdeen, UK aut NATIONALLICENCE 773 0- Oecologia Springer-Verlag 91/4(1992-10-01), 500-504 0029-8549 91:4<500 1992 91 442 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer