A preliminary assessment of stock size and status of Trachurus mediterraneus and T. trachurus species were investigated via virtual population and yield prediction analyses using onboard collected length-frequency data from Northeastern Mediterranean. The length-frequency based VBGF parameters and growth performance index were $L_{\mathrm{\infty }}=28$ cm, $k=0.62$, $t_0=0.58$, $t_{\mathrm{anc}}=0.52$ and ${\Phi }^{{}^{\prime }}=2.69$ for T. mediterraneus and $L_{\mathrm{\infty }}=27.46$ cm, $k=0.54$, $t_0=0.49$, $t_{\mathrm{anc}}=0.41$ and ${\Phi }^{{}^{\prime }}=2.61$ for T. trachurus. Trawl-type selectivity and maturity ogives were 16.73 and 19.2 cm TL for T. mediterraneus, and 17.59 and 19.8 cm TL for T. trachurus, respectively. The virtual population analysis of T. mediterraneus resulted that the minimum and maximum fishing mortalities were 0.02 and 1.09 yr ⁻¹ for the mid-length groups for 10.5 and 24.5 cm, respectively. The minimum and maximum fishing mortality of T. trachurus were 0.0 and 0.89 yr ⁻¹ at the size of 25.5 and 27.5 cm, respectively. Biological reference points of T. mediterraneus point out that the current fishing mortality ($F_{\mathrm{Curr}}=1$.62) is lower than the fishing mortality of $F_{\mathrm{MSY}}$, and the current exploitation rate ($E_{\mathrm{Curr}}=0$.63) is lower than the reference point target benchmarks $E_{\mathrm{0.5}}$ and $E_{\mathrm{MSY,}}$ showing underexploited status. The current fishing mortality ($F_{\mathrm{Curr}}=0$.76) in T. trachurus was observed to be lower than the fishing mortality for the MSY ($F_{\mathrm{MSY}}$), and the current exploitation rate ($E_{\mathrm{Curr}}=0$.46) was lower than $E_{\mathrm{0.5}}$ and $E_{\mathrm{MSY,}}$ indicating currently underemployed status.

通过虚拟种群和产量预测分析，使用从地中海东北部采集的船长频率数据，对Trachurus mediterraneus和T.trachurus物种的种群规模和状况进行了初步评估。基于长度频率的VBGF参数和生长性能指标分别为${\mathrm{大号}}_{\mathrm{\infty }}=\mathrm{28岁}$ 厘米， $ķ=0。62$， ${Ť}_0=0。58$， ${Ť}_{\mathrm{anc}}=0。52$ 和 ${\Phi }^{{}^{\prime }}=\mathrm{2个}。69$用于T. mediterraneus和${\mathrm{大号}}_{\mathrm{\infty }}=27。46$ 厘米， $ķ=0。54$， ${Ť}_0=0。49$， ${Ť}_{\mathrm{anc}}=0。41$ 和 ${\Phi }^{{}^{\prime }}=\mathrm{2个}。61$为T. trachurus。拖网型选择性和成熟ogives分别为16.73和19.2厘米TL为T. mediterraneus，和17.59和19.8厘米TL为T.竹荚，分别。对中间爪。的虚拟种群分析表明，中长度组在10.5 cm和24.5 cm处的最小和最大捕捞死亡率分别为0.02和1.09 yr ^-1。在尺寸为25.5 cm和27.5 cm时，T。trachurus的最小和最大捕捞死亡率分别为0.0和0.89 yr ^-1。T. mediterraneus的生物学参考点指出，目前的捕捞死亡率（$F_{\mathrm{r}}=\mathrm{1个}$.62）低于 $F_{\mathrm{MSY}}$，以及当前的利用率（$E_{\mathrm{r}}=0$.63）低于参考点目标基准 $E_{\mathrm{0.5}}$ 和 $E_{\mathrm{MSY，}}$显示未开发状态。当前捕捞死亡率（$F_{\mathrm{r}}=0$.76）在T. trachurus中被观察到低于MSY的捕捞死亡率（$F_{\mathrm{MSY}}$），以及目前的利用率（$E_{\mathrm{r}}=0$.46）低于 $E_{\mathrm{0.5}}$ 和 $E_{\mathrm{MSY，}}$ 指示当前未充分就业状态。