Length-Weight relationship and relative condition factor in Daysciaena albida (Cuv.) and Gerres filamentosus (Cuv.)
Length-Weight relationship and relative condition factor in Daysciaena albida (Cuv.) and Gerres filamentosus (Cuv.)
Date
1987
Authors
KURUP, B. MADHUSOODANA
SAMUEL, C. T
Journal Title
Journal ISSN
Volume Title
Publisher
Society of Fisheries Technologists (India) Cochin
Abstract
The length-weight relationship of Daysciaena alhida and Gerres jilamentosus
were calculated separately for indeterminants, mature males and mature females.
The logarithmic regression equation obtained for D. albida - males: log
w = -1.5055 + 2.8618 log l; females: log w = -0.9260 + 2.4089 log l ;
indeterminants: log w = -l.7188 + 3.0616 log l. The regression co-efficients
between males and fem ales, males and in determinants and female and in determinants
showed significant differences. In G. filamentosus the relationship can be expressed
as males: logw = -1.3224 + 2.8740 log 1; females: log w = -1.2874 + 2.8381
log l; indeterminants: log w = -0.8167 + 2.2558 log l. The difference in
regression co-efficients between male and female are insignificant at 5 % level whereas
significant differences were observed between males and indeterminants and
females and indeterminants. The relative condition factor (Kn) was calculated
for the above two species. In D. albida the reasons for the :fluctuations of Kn
values can be attributed to both spawning cycle as well as feeding intensity whereas
in G. filamentosus it synchronises mainly with spawning cycle.
Description
Keywords
Length-Weight relationship,relative condition factor ,Daysciaena albida (Cuv.) , Gerres filamentosus (Cuv.)
Citation
Fishery Tech 24(1):88-92