Bibliography Record

x
 
Marmontel, Miriam; O'Shea, Thomas J.; Kochman, Howard I.; Humphrey, Stephen R. (detail)
   
1996
Age determination in manatees using growth-layer-group counts in bone.
Mar. Mamm. Sci. 12(1): 54-88. 3 tabs. 17 figs. Jan. 2, 1996.
–Describes growth-layer groups in an enlarged sample of T. m. latirostris and T. m. manatus, showing that maximum layer counts are obtained from the middle third of the dome region (= pars temporalis or tegmen tympani) of the periotic bone, and that data from known-age, known minimum-age, and tetracycline-marked animals are consistent with annual deposition of the layers. Bone resorption does not affect accuracy of layer counts until ages greater than about 15 years and body lengths greater than 300 cm are attained. Use of layer counts from the periotic bone is considered suitable for studies of population dynamics and other age-related aspects of manatee biology.

Related Index Records (6)

Age Determination
(SEE ALSO: Birth and Breeding; Embryology & Ontogeny; Growth Rates; Population Biology)
  x * 1996 Marmontel et al. (TML, TMM; growth layers in bone; 54-88.)

Florida
  x 1996 Marmontel et al. (TML; age determination by growth layers in bone; 54-88.)

Histology
(SEE ALSO: Skeleton; other organ systems)
  x 1996 Marmontel et al. (TML, TMM; growth layers in bone; 54-88.)

Skeleton
(SEE ALSO: Age Determination; Embryology and Ontogeny; Histology; Myology; Sense Organs; Tooth Replacement; and under species)
  x 1996 Marmontel et al. (TML, TMM; growth layers in bone; 54-88.)

Trichechus manatus latirostris (Harlan, 1824) Hatt, 1934
  x * 1996 Marmontel et al. (Florida; age determination by growth layers in bone; 54-88.)

Trichechus manatus manatus Linnaeus, 1758, Hatt, 1934
  x * 1996 Marmontel et al. (Puerto Rico, Belize; age determination by growth layers in bone; 56, 79-80, 82.)


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