If you would like to have your deer or other game species accurately aged using the cementum annuli
method, contact the Wildlife Analytical Laboratory at (512) 756-1989, or visit them online at deerage.com.
Although scales have been used to age sheepshead (Music and Pafford (2); Schwartz, 1990; and Wenner (3)), validation of annuli
on scales of sheepshead has indicated that scales are not as reliable as otoliths for aging this species.
Besides spinal instability, greater IDP of L4-L5 intervertebral disc and stress in the annuli
will result in rupture of the annulus fibrosus.
and process errors associated with estimating th e number of worn annuli
all combine to produce the low precision in age estimates and therefore growth parameters (Tribuzio et al., 2010).
If the smoothed edge analysis and marginal increment data plotted by day of year formed sinusoidal cycles with a frequency of 1 y (a qualitative, not model-based result), the assumption of true annuli
was considered validated and the timing of annulus formation was estimated.
When the aggregate power from the L annuli
is considered the CF is written as follows:
clavatus based on the number of annuli
and previous reports, however, the sizes in Table 1 for females exceed the ranges established for this species.
In particular, an analysis of cementum annuli
may be used to estimate age, or to develop population estimates through mark-recapture using a biomarker such as tetracycline (Matson and Kerr 1998).
clarkii, in Figure 3B-D, showing sample annuli
from (B) the region near the origin of the aesthetasc array, (C) a region close to the center of the array, and (D) a region just proximal to the tip of the flagellum, the distal termination of the array.
Results: Cadaveric discs, group A, B and C compared with herniated discs A1, B1 and C1, Annuli
fib- rosi in herniated discs (A1, B1, and C1) showed significant reduction of cells, disorganized lamellar pattern of collagen, formation of cysts, clefts and numerous new micro-vessels as compared to fresh cadaveric disc tissues (A, B and C).
Methods typically involve enumeration of zones or rings (annuli
) formed by annual disruptions or changes in growth of the hardpart.
n-harmonic mappings between annuli
; the art of integrating free Lagrangians.