After sending the lower front tooth to Wildlife Analytical Laboratory, the cementum annuli
reading was 4 1/4 years old.
Ketchen (1975) developed an algorithm to estimate the number of missing annuli
in the worn portion of the fin spine using the relationship between the enamel base diameter and the number of annuli
counted on unworn worn fin spines.
Past studies have reported that Atlantic surfclams Spisula solidissima form one annulus per year in the fall, and thus annuli
can be counted to determine the year class of the surfclam and final age can be assigned precisely relative to when the last annulus was formed (Almeida & Sheehan 1997).
were considered to consist of alternating pairs of opaque and translucent growth zones.
Because L annuli
are considered, the energy accumulated in the battery of the harvester node [N.
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.
Seven of 15 in group B and nine of 15 in group C annuli
fibrosi showed in-growth of blood capillaries with unusual pairing of cells which is significant.
Each can provide advantages for a given species based on ease of collection, simplicity of processing, accuracy and precision of estimates of age, and difficulty of discerning annuli
, especially at youngest and oldest ages (Chilton and Beamish, 1982; Beamish and McFarlane, 1983; Casselman, 1987).
This assumption has been proved to work reasonably well for flows through concentric annuli
 for certain range of tubular diameter ratio.
5, p = 1, q = 1, r = 1, we observed an interesting scenario of the chaos development in the system: From the stationary state after doubling period bifurcation, the periodic regime with an attractor consisting of two points occurs, from which, in its turn, a quasiperiodic regime and an attractor of two annuli
come up (see Figure 3.
Non-Newtonian flow in annuli
is encountered in many situations of importance in a variety of industries and particularly in oil-well drilling.