University of Groningen
Our group has historically had very strong links with the University of Groningen. In particular the late Henk Visser’s laboratory which was one of the only other sites worldwide applying DLW to small animals, and our groups have many research interests in common.
In 2003 Henk spent a 4 month sabbatical in Aberdeen working on an aspect of the limitations on maximal metabolic rate using our MF1 mouse system.
In 2004 he was made an honorary Professor of the University of Aberdeen. The linkages between our groups was enhanced early in 2006 when we started a series of workshops involving group visits between Aberdeen and Groningen – the GRO-ABS workshops.The first workshop involved a delegation of scientists form Groningen visiting Aberdeen for 3 days.
Chinese Academy of Sciences, Beijing
This collaboration started in 2005 when John Speakman spent 4 weeks in China funded by the Royal Society of Edinburgh. A reciprocal visit by DeHua Wang to Aberdeen was made in February 2006 to coincide with the ABS-GRO workshop held in Aberdeen at that time (above). In the summer of 2006 John Speakman spent another 5 weeks in China this time working on regulation of body weight in Brandt’s voles. In early 2007 DeHua spent 6 weeks working in Aberdeen and a student from his group (LiNa Zhang) started a 3 year PhD research project in January 2007 funded partly by the University and partly by Astrazeneca. During the summer 2007 three members of the Aberdeen group spent time in China working at the new CAS building in Beijing on limits to lactation performance in Brandt’s voles.
Plateau pika project
McGill University, Canada
Energetics of red squirrels in the Yukon.
Murray Humphries worked in the energetics lab at Aberdeen for 3 months during the summer of 2001. He was a visiting student from Don Thomas’s lab in Sherbrooke Canada. During the summer he worked on an energetics model that Don and I had previously sketched out in a book chapter. Murray developed this model and we used it to predict the likely impact of climate changes in North America on the distribution patterns of little brown bats.
This work forms an important physiological bridge tieing together climatic changes with distributional changes of animals. Following this work he returned to Canada where he started working on the survival strategies of over-wintering red squirrels in the Yukon. Our collaborative measures of energy expenditure in these animals during the severe Yukon winters have revealed they have surprisingly low metabolic rates. Paula Redman visited the Yukon in 2005 to assist with the doubly-labelled water work. We have now expanded the work to look at the impacts of over-wintering on the subsequent reproductive performance of squirrels.
Humphries, M.M., Thomas, D.W., Hall, C.L., SPEAKMAN, J.R., and Kramer, D.L.
(2002) The energetics of autumn mast hoarding in eastern chipmunks
Oecologia 133: 30-37
Humphries, M.M., Thomas, D.W. & SPEAKMAN, J.R. (2002)
Climate mediated energetic constraints on the distribution of hibernating bats.
Nature 418: 313-316
Humphries, M., SPEAKMAN, J.R., and Thomas, D. (2005)
Temperature, hibernation energetics, and the cave and continental distributions of little brown bats. In Functional and Ecological aspects of the biology of bats. (Ed. T.H. Kunz)
Chicago University press
Humphries M.M., Boutin S., Thomas D.W., Ryan J.D., Selman C., McAdam A.G., Berteaux D., SPEAKMAN, J.R. (2005)
Expenditure freeze: the metabolic response of small mammals to cold
Environments Ecology letters 8: 1326-1333
Energetics of Walrus in Greenland
Mario was a Marie Curie exchange student who came to work in Aberdeen for 6 months in 2002. He has used the doubly-labelled water method to estimate the energy demands of walrus living in northern Greenland. At a body weight of almost 1 ton these are the largest animals that have ever been measured using the technique. These data are important because they impact critically on our estimates of the energy demands of pinnipeds when using allometric scaling models. Such estimates for a crucial component of fisheries models aiming to predict the impact of pinnipeds on fish stocks..
Maria da luz Matthias
Energetics of genetic races of house mice on Madiera
Maria visited Aberdeen to learn the techniques of indirect calorimetry. We subsequently collaborated to measure the energy demands of different Robertsonian chromosome races of mice living in the wild on the island of Madiera.
Mathias, ML., Nunes, A.C., Marques, C., Auffray, J.C., Britton Davidian, J.,
Catalan, J., Ganem, G., Grunduz, I., Ramathinho, M.G., Searle, J.B. and SPEAKMAN, J.R.(2006)
Effects of climate on oxygen consumption and energy intake of chromosomally divergent populations of the house mouse (Mus musculus domesticus) from the island of Madeira (North Atlantic, Portugal).
Energetics of over-wintering Apodemus falvicollis
The yellow-necked mouse is a rare species of Apodemus in the United Kingdom although much commoner and more widespread on mainland Europe. Phillipe has been studying the over-wintering energy demands of mice and in particular the benefits gained from huddling behaviour.
Karol Zub Paulina Szafranska
Mammal Research Institute, Bialowieza, Poland
Energetics of weasels
Zub K., Szafrańska P. A., Konarzewski M., Redman P., SPEAKMAN, J.R. (2009)
Tradeoffs between activity and thermoregulation in a small carnivore, the least weasel Mustela nivalis Proceedings of the Royal Society B 276: 1921-1927