Barclay, Robert Malcolm RuthvenHolroyd, Susan Lesley2005-08-052005-08-051993Holroyd, S. L. (1993). Influences of some extrinsic and intrinsic factors on reproduction by big brown bats (Eptesicus fuscus) in southeastern Alberta (Master's thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/18733031588536Xhttp://hdl.handle.net/1880/30643Bibliography: p. 116-126.I found that both extrinsic and intrinsic factors influenced the energetics of reproduction of big brown bats (Eptesicus fuscus) in southeastern Alberta. During a two year study of two maternity colonies in Medicine Hat, cooler ambient temperatures during the early portion of the reproductive period in 1990 as compared to 1991 were associated with fewer females breeding, later parturition and fledging dates, depressed growth rates of young, and an indication of lower offspring survival over their first winter. Age, body size and body condition of breeding females were correlated with the sex ratio and size of litters produced. Small, young, light females were likely to be non-reproductive, especially during the cool year. Older females were likely to produce litters biased towards males. Juvenile mortality rates and season length are probably the key factors influencing the reproductive strategy of western populations of fuscus.xiv, 126 leaves : ill. ; 30 cm.engUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.QL 737 C595 H64 1993Eptesicus - ReproductionEptesicus - BehaviorBats - Albertamaster thesis10.11575/PRISM/18733QL 737 C595 H64 1993