Cahiers De Biologie Marine, vol.63, no.1, pp.19-27, 2022 (SCI-Expanded)
Overall and
spatiotemporal total length-weight relationships (LWR) were studied for the 116
fish composing of 107 osseous and 9 cartilaginous fish species collected by
Otter trawl in the shelf and upper slope of Gulf of Antalya in 2014-2015. Of
the 89 abundant bony species, 38 species had isometric growth, 24 species
positive allometry, and 27 species negative allometry. Growth type was
significantly affected with the sample size. LWRs of osseous fish species which
had their body condition factors, CF ≤1 were significantly differentiated by factors
with all of the region, season and depth, but none was for the fish having CF≥1.
The factorial differences were found in relation with the CF. The b values for the osseous fish decreased
slightly by the bottom depth from lower shelf to middle shelf. The highest b values occurred for the ubiquitous
fish on the entire shelf while the a
values increased. At greater depths, the b
values shifted the allometry from the isometry to the negative allometry. Average
b value of osseous fish was 2.962 ±
0.048 (isometric), and median was 2.992. LWRs of body width-weight of batoid
fish formulized the relationships overall having b=3 or b<3, less than
3 on average. Sexual dimorphism in the LWR occurred for 10 fish species.