Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If You Use a Screen Reader

This content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.

Vertebral Growth Zone Deposition in Pacific Angel Sharks

Lisa J. Natanson and Gregor M. Cailliet
Copeia
Vol. 1990, No. 4 (Dec. 31, 1990), pp. 1133-1145
DOI: 10.2307/1446499
Stable URL: http://www.jstor.org/stable/1446499
Page Count: 13
  • Read Online (Free)
  • Download ($12.00)
  • Subscribe ($19.50)
  • Cite this Item
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Vertebral Growth Zone Deposition in Pacific Angel Sharks
Preview not available

Abstract

Vertebrae and body size measurements were taken from 334 Pacific angel sharks collected from commercial gill netters off Santa Barbara, California, from Sept. 1979-Nov. 1983. Radiographs of vertebral centra from 247 specimens were studied to delineate calcified bands for age determination. The vertebrae of the smallest newborn sharks (260 mm TL) had 6 or 7 bands while those of the largest (1140 mm TL) had 42 bands. Bands were not deposited annually but were related to somatic growth. This hypothesis is supported by the number of bands in embryos and newborn Pacific angel sharks, growth of girth, and vertebral centrum dimensions, laboratory grow-out studies of tetracycline-injected sharks, and evidence from six tetracycline-injected tag returns.

Page Thumbnails

  • Thumbnail: Page 
1133
    1133
  • Thumbnail: Page 
1134
    1134
  • Thumbnail: Page 
1135
    1135
  • Thumbnail: Page 
1136
    1136
  • Thumbnail: Page 
1137
    1137
  • Thumbnail: Page 
1138
    1138
  • Thumbnail: Page 
1139
    1139
  • Thumbnail: Page 
1140
    1140
  • Thumbnail: Page 
1141
    1141
  • Thumbnail: Page 
1142
    1142
  • Thumbnail: Page 
1143
    1143
  • Thumbnail: Page 
1144
    1144
  • Thumbnail: Page 
1145
    1145