. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 296 REPORTS FROM THE MBL GENERAL SCIENTIFIC MEETINGS 3. Valiela, I., G. Tomasky, J. Hauxwell, M. L. Cole, J. Cebrian, and K. D. Kroeger. 2000. Ecol. ,4/>/>/. 10: 1006-1023. 4. Peterson, B., and B. Fry. 1987. ,4»/i». Rev. Ecol. Syst. 18: 293-320. 5. McClelland, J., I. Valiela, and R. Michener. 1997. Limnol. Ocean- ogr. 42: 930-937. 6. Valiela. I., M. Geist, J. McClelland, and G. Tomasky. 2000. Bii>- geochemistn- 49: 277-293. 7. Valiela, 1., K. Foreman, M. LaMontagne. D. Hersh, J. Costa, P. Peckol. B. DeMeo-Anderson,
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 296 REPORTS FROM THE MBL GENERAL SCIENTIFIC MEETINGS 3. Valiela, I., G. Tomasky, J. Hauxwell, M. L. Cole, J. Cebrian, and K. D. Kroeger. 2000. Ecol. ,4/>/>/. 10: 1006-1023. 4. Peterson, B., and B. Fry. 1987. ,4»/i». Rev. Ecol. Syst. 18: 293-320. 5. McClelland, J., I. Valiela, and R. Michener. 1997. Limnol. Ocean- ogr. 42: 930-937. 6. Valiela. I., M. Geist, J. McClelland, and G. Tomasky. 2000. Bii>- geochemistn- 49: 277-293. 7. Valiela, 1., K. Foreman, M. LaMontagne. D. Hersh, J. Costa, P. Peckol. B. DeMeo-Anderson, C. D'Avanzo, M. Babione, Sham, J. Braw- ley, and K. Lajtha. 1992. Estuaries 15: 433-457. Reference: Bio/. Bull. 201: 296-297. (October 2001) Age Structure of the Pleasant Bay Population of Crepidula fornicata: A Possible Tool For Estimating Horseshoe Crab Age Sam P. Gmdy, Deborah Rntecki, Ruth Cannichael, and Ivan Valiela (Boston University Marine Program, Marine Biological Laboratory, Woods Hole, Massachusetts 02543) Crepidula fornicata. the common slipper shell, lives on rocks, horseshoe crabs (Limit/us polyphemus), and other hard surfaces, often in stacks of one animal atop another. Unlike many other gastropods, they tend to remain sessile, and as they grow, their shells contour to the substrate (1). The association between horse- shoe crabs and C. fornicata offers the possibility to use the slipper shell as a tool to determine the ages and average lifespan of horseshoe crabs (2). Knowing this information would be helpful for trying to understand horseshoe crab ecology for use in conser- vation efforts. It is difficult to directly estimate horseshoe crab age because horseshoe crabs lack any hard parts that could be sectioned and analyzed for growth rings. Their chitinous exoskeleton is molted with decreasing frequency until a theoretical "terminal molt" (3). There are also a variety of sizes within visually estimated age classes because growth is very slow
Size: 2166px × 1154px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
