Influence of sectioning location on age estimates from common carp dorsal spines

North American Journal of Fisheries Management
By: , and 

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Abstract

Dorsal spines have been shown to provide precise age estimates for Common CarpCyprinus carpio and are commonly used by management agencies to gain information on Common Carp populations. However, no previous studies have evaluated variation in the precision of age estimates obtained from different sectioning locations along Common Carp dorsal spines. We evaluated the precision, relative readability, and distribution of age estimates obtained from various sectioning locations along Common Carp dorsal spines. Dorsal spines from 192 Common Carp were sectioned at the base (section 1), immediately distal to the basal section (section 2), and at 25% (section 3), 50% (section 4), and 75% (section 5) of the total length of the dorsal spine. The exact agreement and within-1-year agreement among readers was highest and the coefficient of variation lowest for section 2. In general, age estimates derived from sections 2 and 3 had similar age distributions and displayed the highest concordance in age estimates with section 1. Our results indicate that sections taken at ≤ 25% of the total length of the dorsal spine can be easily interpreted and provide precise estimates of Common Carp age. The greater consistency in age estimates obtained from section 2 indicates that by using a standard sectioning location, fisheries scientists can expect age-based estimates of population metrics to be more comparable and thus more useful for understanding Common Carp population dynamics.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Influence of sectioning location on age estimates from common carp dorsal spines
Series title North American Journal of Fisheries Management
DOI 10.1080/02755947.2015.1042561
Volume 35
Issue 4
Year Published 2015
Language English
Publisher Taylor & Francis
Contributing office(s) Coop Res Unit Seattle
Description 8 p.
First page 690
Last page 697
Online Only (Y/N) N
Additional Online Files (Y/N) N
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