TITLE:
Length-Weight and Some Morphometric Relationships of Valamugil seheli from Sudanese Red Sea Coast
AUTHORS:
Motasim Ali Mokhtar, Osman Mohammed Farah, Sayed Mohammed Ali
KEYWORDS:
Body Depth, Body Girth, Length-Weight Relationship, Valamugil seheli
JOURNAL NAME:
Open Access Library Journal,
Vol.2 No.11,
November
11,
2015
ABSTRACT: Length-weight relationship is an essential biological parameter needed to
appreciate the suitability of the environment for any fish species. That is why
many fishery biological studies give an importance to it. The relationships
between total length and body depth and girth are very important in estimating
the allowable catch and appropriate mesh size to be used in a fishery. Length-weight
and some morphometric relationships (depth-total length, girth-total length and
dorsal fin length and anal fin length-total
length) of Valamugil seheli (local name Arabi) (Mugilidae)
were calculated from the commercial catches landed at Port Sudan Fish
Market from February 2010 to January 2011. The length-weight relationship was
found to be stronger in females (W = 0.0073L3.1047, R2 =
0.966) than in males (W = 0.0074L3.0954, R2 = 0.926). But
for sexes combined it was y = 0.007x3.114, R2 = 0.961.
Values of R2 were high in all cases. The length-weight relationship
indicated the cube law (W = aL3) for males, females and the sexes
combined relationships. The power equations for the relationship between total
length and body depth, and total length and girth, for the two sexes have
higher R2 than the strait line equations and hence better describe
the two relationships. The two relations were stronger in females than in
males. The relationships between total length and the first dorsal fin length
and anal fin length of sexes combined of V. seheli were not as
strong as the total length-total weight relationship.