Skip to main content

Validating and corroborating the deposition of two annual growth zones in asteriscus otoliths of common carp Cyprinus carpio from South Africa's largest impoundment

Buy Article:

$51.00 plus tax (Refund Policy)

Abstract:

A total of 816 common carp Cyprinus carpio asteriscus otolith pairs were collected from Lake Gariep, South Africa. Otoliths were interpreted whole, submerged in methyl salicylate and viewed under transmitted light. The precision of growth zone counts of the primary reader was estimated at 5·54 and 7·03% using the average per cent error method and the coefficient of variation, respectively. Age-bias plots indicated no systematic bias between the primary reader and the three secondary readers for up to nine growth zones (95% of the sample). Growth zone deposition rate was validated using a mark–recapture experiment of chemically tagged C. carpio (n = 21) conducted in a large earthen pond under ambient conditions in the vicinity of Lake Gariep. The validation results were corroborated for the wild population by edge analysis and a length-based age-structured model. All three methods suggest that growth zone formation occurred biannually, exemplifying the importance of age validation as a prerequisite for understanding the life history of C. carpio.

Keywords: Lake Gariep; biannual; edge analysis; length-frequency analysis; oxytetracycline

Document Type: Regular Paper

DOI: http://dx.doi.org/10.1111/j.1095-8649.2010.02797.x

Affiliations: 1: South African Institute for Aquatic Biodiversity, Private Bag 1015, Grahamstown 6140, South Africa 2: Department of Ichthyology and Fisheries Science, P. O. Box 94, Rhodes University, Grahamstown 6140, South Africa

Publication date: December 1, 2010

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Partial Open Access Content
Partial Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more