<abstract xmlns="http://www.w3.org/1999/xhtml">The length-weight relationship and condition factor of <italic>Sphyraena afra</italic> from the Lagos coast (LC) and the Lagos lagoon complex (LLC) in the coastal waters of Lagos State were studied for a period of two years. Parameters a and b of the length-weight relationship were estimated using the equation W = a x TLb, while the condition factor was calculated with the equation K = 100 x BW x TL-3. The relationships of fish condition factor and body length, sex, and seasons in Lagos coastal waters were determined. The species exhibited negative allometric growth (b &lt; 3, P &lt; 0.05) for males, females, and combined sexes with the length exponent (b) ranging from 2.72 to 2.85. Correlation coefficient r ranged from 0.89 to 0.98. The allometric growth values obtained in LC and LLC from the length-weight relationship indicated that the fish species exhibited increases in length rather than in weight. The overall mean condition factors (K) for <italic>S. afra</italic> from the LC and the LLC were 0.97 ± 0.11 and 1.17 ± 0.12, respectively. The mean condition factors of females were higher than those for males at most of the sampling stations, and <italic>S. afra</italic> was observed to be in better condition during the dry season.</abstract>

The length-weight relationship and condition factor of Sphyraena afra from the Lagos coast (LC) and the Lagos lagoon complex (LLC) in the coastal waters of Lagos State were studied for a period of two years. Parameters a and b of the length-weight relationship were estimated using the equation W = a x TLb, while the condition factor was calculated with the equation K = 100 x BW x TL-3. The relationships of fish condition factor and body length, sex, and seasons in Lagos coastal waters were determined. The species exhibited negative allometric growth (b < 3, P < 0.05) for males, females, and combined sexes with the length exponent (b) ranging from 2.72 to 2.85. Correlation coefficient r ranged from 0.89 to 0.98. The allometric growth values obtained in LC and LLC from the length-weight relationship indicated that the fish species exhibited increases in length rather than in weight. The overall mean condition factors (K) for S. afra from the LC and the LLC were 0.97 ± 0.11 and 1.17 ± 0.12, respectively. The mean condition factors of females were higher than those for males at most of the sampling stations, and S. afra was observed to be in better condition during the dry season.

Length-weight relationship and condition factor of <italic>Sphyraena afra</italic> from the coastal waters of Lagos State

Department of Biotechnology, Nigerian Institute for Oceanography and Marine Research

Fisheries & Aquatic Life

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Length-weight relationship and condition factor of  from the coastal waters of Lagos State

The length-weight relationship and condition factor of Sphyraena afra from the Lagos coast (LC) and the Lagos lagoon complex (LLC) in the coastal waters of...

Length-weight relationship and condition factor of Sphyraena afra from the coastal waters of Lagos State

Published Online: May 02, 2019

Page range: 27 - 31

Received: Jan 23, 2016

Accepted: Jan 16, 2019

DOI: https://doi.org/10.2478/aopf-2019-0003

Keywords
condition factor, length-weight relationship, correlation coefficient

© 2019 Caroline Ireti Ayo-Olalusi et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Length-weight relationship and condition factor of Sphyraena afra from the coastal waters of Lagos State

Published Online: May 02, 2019

Page range: 27 - 31

Received: Jan 23, 2016

Accepted: Jan 16, 2019

DOI: https://doi.org/10.2478/aopf-2019-0003

Keywordscondition factor, length-weight relationship, correlation coefficient

© 2019 Caroline Ireti Ayo-Olalusi et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
condition factor, length-weight relationship, correlation coefficient