Age, growth and natural mortality of coney (Cephalopholis fulva) from the southeastern United States

PeerJ. 2015 Mar 19:3:e825. doi: 10.7717/peerj.825. eCollection 2015.

Abstract

Coney (Cephalopholis fulva) sampled from recreational and commercial vessels along the southeastern coast of the United States in 1998-2013 (n = 353) were aged by counting opaque bands on sectioned sagittal otoliths. Analysis of otolith edge type (opaque or translucent) revealed that annuli formed in January-June with a peak in April. Coney were aged up to 19 years, and the largest fish measured 430 mm in total length (TL). The weight-length relationship was ln(W) = 3.03 × ln(TL) - 18.05 (n = 487; coefficient of determination [r (2)] = 0.91), where W = whole weight in kilograms and and TL = total length in millimeters. Mean observed sizes at ages 1, 3, 5, 10, and 19 years were 225, 273, 307, 338, and 400 mm TL, respectively. The von Bertalanffy growth equation for coney was Lt = 377 (1 - e ((-0.20(t+3.53)))). Natural mortality (M) estimated by Hewitt and Hoenig's longevity-based method which integrates all ages was 0.22. Age-specific M values, estimated with the method of Charnov and others, were 0.40, 0.30, 0.26, 0.22, and 0.20 for ages 1, 3, 5, 10, and 19, respectively.

Keywords: Age and growth; Life history; Natural mortality; Serranidae.

Grants and funding

This work was funding by the National Marine Fisheries Service, Southeast Fisheries Science Center, Miami, FL. The Southeast Fisheries Science Center had no role in the design or execution of the study but did have the final say in the decision to publish the manuscript (did it meet strict scientific guidelines and quality).