Past Updates

Effective March 9, 2013: Important instructions for shipping CITES listed samples. See International Shipping Requirements.

New Cementum Analysis Order Form Effective Oct. 3, 2011.

September, 2011: Clients outside the U.S. must be aware that shipments to the lab accompanied by invalid CITES documents may be seized by the U.S. Fish and Wildlife Service Office of Law Enforcement and permanently lost. To help avoid this loss of valuable specimens and data, please call the lab before you ship. We can verify compliance with the CITES permit document requirements. Please view important details about the CITES permit process.

October, 2010: Experience, Accuracy, Precision.

Female Black Bear reproductive histories: Effective 1 October, 2009, Matson’s will begin adding an additional charge for female black bears with reproductive history reconstructions. For those females with cementum evidence suggesting cub rearing, the reconstruction is an essential but time consuming part of age analysis. The charge will compensate for the additional time required. Price List

A photograph of a Washington black bear tooth section has been added to analysis of female reproductive histories.

Age analysis by Technicians: Some of our technicians have completed our in-house training program for age analysis of black bear, brown bear, elk, whitetail deer, mule deer, bobcat, raccoon, fisher, and marten. Gary Matson checks 10% of all samples aged by technicians, and 100% of the black bear reproductive histories. View a tabulation of precision (agreement between Gary’s result and technician’s result).

Soft tissue service to be discontinued June 1, 2008.

New record ages for mink, badger. Matson’s Lab recently processed and analyzed a mink from France that is the oldest aged in this laboratory. The age of 10 years eclipsed the prior record of 9 years set by a mink from the Northwest Territories. Submitted by Christine Fournier. Experience, Accuracy and Precision. Added January, 2008.

Matson’s Lab recently processed and analyzed a Washington State badger tooth that is the oldest aged in this laboratory. The age of 19 years eclipsed the prior record of 15 years set by a Wyoming badger. Submitted by Nick Paulson. Experience, Accuracy and Precision. Added January, 2008.

Skeletochronology service discontinued; Advance scheduling requested. January, 2007.

Marten/fisher standardized tooth type: Lower PM4. Cementum Aging. Added December 10, 2005.

New record pronghorn. Matson’s Lab recently processed and analyzed a North Dakota pronghorn tooth that is the oldest aged in this laboratory. The age of 17 years eclipsed the prior record of 15 years set by an Oregon pronghorn tooth and equaled by one from New Mexico. Submitted by Jesse Kolar. Experience, Accuracy and Precision. Added April 21, 2005.

Expected accuracy differs among whitetail deer populations.
A whitetail deer from a northern region typically has annuli with major and minor components that occur in a regular pattern of cementum deposition. In deer populations that are supplementally fed to produce more robust antlers and greater body size, cementum annulus complexity and irregularity of deposition are greater. These characteristics contribute to a greater age analysis difficulty and lower accuracy. For additional information, see Experience, Accuracy and Precision. Added April 15, 2005.

New information added about “Endangered or threatened species (ESA) permits,” International shipments, and “Age Analysis Photo Reference,” Prices. Added March 18, 2005.

Experience. Updated number of teeth aged from 1978 to December 31, 2002. Added January 6, 2005.

Schedule for processing samples from Private Hunter, Outfitter, Hunting Club, & Game Farm Clients. Added December 29, 2004.

A Laboratory Manual for Cementum Age Determination of Alaska Brown Bear First Premolar Teeth by Gary Matson, Larry Van Daele, Enid Goodwin, Larry Aumiller, Harry Reynolds, Hank Hristienko. (File format: PDF/Adobe Acrobat. This is a large file and may take many minutes to load. Please be patient. See link bottom of description.)

Brown/grizzly bear age data derived from cementum aging have been questioned since the inception of the technique. In 1988, ADFG set out to evaluate the accuracy and precision of their aging techniques by comparing the results of various individual tooth agers using different methods. A test sample was assembled that included 75 tooth sections prepared from known age brown bear PM1 teeth, and 25 from assigned age teeth. ADFG biologist Larry Van Daele designed the evaluation and served as coordinator. Three Department personnel participated in the evaluation: Enid Goodwin, Harry Reynolds, and Larry Aumiller. The fourth participant was Gary Matson, owner of Matson’s Laboratory. Participants’ experience with cementum aging varied from 1 to 20+ years. Publications. Added October 27, 2004.

Tetracycline does not induce fluorescing biomarker in hair. Tetracycline Biomarker Analysis. Added May 17, 2004.

New record grizzly bear. The oldest grizzly bear aged by Matson’s is from British Columbia, aged as 38A (36-40) on May 5, 2004. Submitted by Anne Thogersen. Experience, Accuracy, & Precision. Added May 11, 2004.

New record sika deer. The oldest sika deer aged by Matson’s is from Japan, aged as 18A (no range) on February 5, 2004. Submitted by Akiko Takii. Experience, Accuracy, & Precision. Added May 11, 2004.

Gary Matson was awarded the Burk-Brandborg conservation award on Earth Day, April 22, 2204. About Us. Added May 11, 2004.

New record red fox. The oldest fox aged by Matson’s is a red fox from Sweden, aged as 16A (15-17) on March 10, 2004. Submitted by J-O Helldin. Experience, Accuracy, & Precision. Added April 6, 2004.

Photomicrographs. Cementum aging. Added February 3, 2004.