Morphometric characteristics and condition factor of atlantic chub mackerel Scomber colias from the Adriatic sea

Cilj rada bio je utvrditi i opisati morfometrijske značajke, dužinsko – maseni odnos i kondiciju dvije populacije lokarde iz Jadranskog mora. Uzorkovanja su provedena na području sjevernog Jadrana tijekom studenog 2018.g. te srednjeg Jadrana tijekom ožujka 2019. g. Uzorci (130) su ulovljeni mrežom plivaricom. Najveći raspon omjera tijela zabilježen je u odnosu standardne dužine i dužine do vilice za sjeverni i srednji Jadran, a najmanji je zabilježen u odnosu visine tijela i dužine do vilice za ista područja. Dužinsko maseni odnosi lokarde sjevernog Jadrana indiciraju pozitivan alometrijski rast (W=0,003 x L3,339), dok je na srednjem Jadranu u uzorcima iz ožujka utvrđen negativan alometrijski rast (W=0,012 x L2,865). Fultonov faktor kondicije lokarde uzorkovane u studenom na području srednjeg Jadrana ukazao je na nižu kondiciju riba (CF = 0,77±0,04 ) dok je kod lokarde uzorkovane u studenom na sjevernom Jadranu iznosio CF = 0,88±0,08.The aim of the study was to determinate and describe morphometric characteristics, length–weight relationships and condition factor of the two populations of Atlantic chub mackerel Scomber colias from the Adriatic Sea. The study was based on two locations, the northern Adriatic Sea during November 2018, and the middle Adriatic Sea during March 2019. Samples were caught by a purse-seine net with a total of 130 specimens. The maximum ratio range of body proportion was noted in standard and fork length for both the northern and the middle Adriatic, and the minimum was noted in proportion of body depth and fork length for both areas. Length–weight relationships of Scomber colias indicate positive allometry growth for the northern Adriatic population (W=0.003 x L3.339) and an isometric growth for the middle Adriatic during March (W=0.012 x L2.865). The lower value of condition factor was calculated for samples from the middle Adriatic during March (CF = 0.77±0.04) while the samples from the northern Adriatic during November (CF = 0.88±0.08)