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First published online February 27, 2009
Journal of Experimental Biology 212, 790-796 (2009)
Published by The Company of Biologists 2009
doi: 10.1242/jeb.025387
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Diving into old age: muscular senescence in a large-bodied, long-lived mammal, the Weddell seal (Leptonychotes weddellii)

Allyson G. Hindle1,2,*, Markus Horning1,3, Jo-Ann E. Mellish4 and John M. Lawler5

1 Department of Marine Biology, Texas A&M University at Galveston, 5007 Avenue U, Galveston, TX 77551, USA
2 Marine Mammal Research Unit, University of British Columbia, Room 247, 2202 Main Mall, Vancouver, BC, Canada V6T 1Z4
3 Department of Fisheries and Wildlife, Marine Mammal Institute, Oregon State University, 2030 SE Marine Science Drive, Newport, OR 97365, USA
4 School of Fisheries and Ocean Sciences, University of Alaska Fairbanks, Alaska SeaLife Center, 301 Railway Avenue, Seward, AK 99664, USA
5 Department of Health and Kinesiology, Intercollegiate Faculty of Nutrition, Texas A&M University, College Station TX 77843, USA


Figure 1
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  		Fig. 1. Weddell seal longissimus dorsi muscle biopsies (7–9 µm transverse sections) from (A) young female; (B) old female. Sections were stained with Hematoxylin for contrast (200x magnification).

 

Figure 2
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  		Fig. 2. Immunohistochemical staining for collagen subtypes in pectoralis muscle biopsies from female Weddell seals (7–9 µm transverse sections; 200X magnification). (A,C) Collagen type I and (B,D) collagen type III from young (A,B) and old (C,D) individuals.

 

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© The Company of Biologists Ltd 2009