Horse Mackerel Research Articles

Preservative Effect of Alga Flour Extract on Frozen Horse Mackerel (Trachurus trachurus) Lipids.

The aim of this study was to investigate the preservative properties of alga Gelidium sp. flour when included in the glazing medium employed for the frozen storage (-18 °C) of horse mackerel (Trachurus trachurus). Different concentrations (low, medium, and high) of an aqueous extract were tested and compared to a control water-glazing condition. Quality changes (lipid oxidation and hydrolysis, fatty acid (FA) profile, and trimethylamine (TMA) formation) were determined after 3- and 6-month storage periods. A general quality loss (lipid oxidation with hydrolysis development and TMA formation) with the frozen storage period was detected in all samples. The presence of an alga flour (AF) extract in the glazing medium led to a lower (p < 0.05) TBARS and fluorescent compound formation and to higher (p < 0.05) polyene values in frozen fish. Furthermore, a preserving effect on free fatty acids was detected in AF-treated fish. On the contrary, the AF-glazing treatment did not affect (p > 0.05) the TMA formation and the total n3/total n6 FA ratio. In general, preservative effects were found to be higher in frozen fish corresponding to the medium concentration tested. Current results show the potential of Gelidium sp. flour as a natural source of preservative hydrophilic compounds for the quality enhancement of frozen horse mackerel.

Resistance patterns, virulence determinants, and biofilm genes of multidrug-resistant Pseudomonas aeruginosa isolated from fish and fish handlers

Pseudomonas aeruginosa (P. aeruginosa) is an opportunistic bacterium that is widely distributed in aquatic environments and causes major economic losses in fish and public health hazards.This study aimed to identify the occurrence of P. aeruginosa in samples collected from fish and fish handlers, and to investigate the antimicrobial susceptibility, virulence determinants, and biofilm genes of P. aeruginosa isolates. A total of 276 samples were cross-sectionally collected from Nile tilapia (53), Golden grey mullet (52), Mediterranean horse mackerel (50), Striped red mullet (71), and fish handlers (50) at five different retail fish markets in Damietta Governorate, Egypt. Pseudomonas species (spp.) were biochemically identified in 57.9% of the total examined samples. Peudomonas aeruginosa were the most prevalent species isolated from the fish and human samples via PCR technique. Peudomonas aeruginosa isolates exhibited full resistance (100%) to tobramycin (TOB), gentamicin (CN), and colistin (CL), with a high level of susceptibility (88.5%) to imipenem (IPM) using the disk diffusion method. Most P. aeruginosa isolates (84.6%) exhibited drug resistance, with 61.5% were multidrug resistance (MDR) and 23.1% were extensive drug resistance (XDR). Most isolates had at least four virulence-associated genes (lasB, toxA, exoU, and oprL) and three biofilm genes (psIA, peIA, and lasR) by using uniplex PCR. The lasI, and rhlR Quorum Sensing (QS) genes were identified in 84.6% and 61.5% in the examined P. aeruginosa isolates, respectively. The highest mortality rate in Nile tilapia experimentally infected with P. aeruginosa isolate encoding most of virulent genes. Multivariate analyses revealed high heterogeneity among the examined isolates. This study revealed the emergence of virulent and drug resistant P. aeruginosa isolates in fish, poses high risks to consumers and food. Thus, strict hygienic measures should be considered when catching, handling, and storing fish, in addition to the routine application of antimicrobial susceptibility testing.

Can Consumers Judge the Freshness of Fish from Visual Cues? A Case Study of Japanese Consumers

In contemporary markets, fish are frequently wrapped in cling film, necessitating consumers’ reliance on visual cues to assess freshness. This study explores whether common Japanese consumers can accurately discern fish freshness based solely on visual information. We conducted an online experiment with 529 randomly selected participants in Japan by asking them to select the freshest fish from photographs of horse mackerel with varying freshness levels. In order to elucidate the mechanism of freshness detection, we conducted principal component analysis on the quantified body color and shape data. Additionally, we measured physical characteristics such as lipid contents, gloss, length, and weight of the fish. This study examines the correlation between these visual cues and consumers’ judgments, revealing the accuracy of visual indicators used by consumers in daily assessments of fish freshness. These findings suggest that a portion of Japanese consumers can correctly identify the freshness of fish based on appearance. They primarily rely on the brightness of the fish’s eyes and specific color combinations of the body to judge freshness, with the shape of the fish having less impact. Comparing the selection frequency between high- and low-accuracy participants, we observed that a low accuracy in freshness detection was not solely due to a lack of sensitivity to signals from photographs, but may also result from a misinterpretation of these signals by consumers.

Recombinant Gad c 1 improves diagnostic efficacy of cod allergy but not horse mackerel allergy.

Parvalbumin Gad c1 is a major cod allergen used as a follow-up marker of fish-allergic children. However, the diagnostic efficacy of recombinant Gad c 1 (rGad c 1) for fish allergy diagnosis remains controversial. This study aimed to evaluate the efficacy of rGad c1 for diagnosing cod and horse mackerel allergy. This single-centered, retrospective study obtained oral food challenges (OFCs) information performed for cod and horse mackerel. Cod-, horse mackerel-, and rGad c1-specific immunoglobulins (sIgEs) were investigated. Diagnostic performances of these parameters were compared using areas under the curve (AUC). We enrolled 45 and 38 children with suspected cod and horse mackerel allergies, respectively. The median age (interquartile range) of children with suspected cod allergy was 5.7 (0.7-11.7) years and that of children with suspected horse mackerel allergy was 6.0 (1.0-12.3) years. Fourteen and 22 children reacted to OFCs with 25 (10-40) g of cooked pacific cod and 40 (10-40) g of cooked horse mackerel, respectively. The cod sIgE and rGad c 1 sIgE AUCs for cod allergy diagnosis were 0.85 and 0.90, respectively. For horse mackerel allergy diagnosis, AUCs of horse mackerel and rGad c 1 sIgE were 0.76 and 0.72, respectively. Both AUCs for cod and mackerel allergy were significantly different. rGad c 1 sIgE is more effective than cod sIgE as a diagnostic marker of cod allergy, but less effective than horse mackerel sIgE as a diagnostic marker of horse mackerel allergy. Further studies are warranted to explore the potential applications of rGad c 1 sIgE in the diagnosis of various fish allergies.

Occurrence of microplastics in the gastrointestinal tracts of four most consumed fish species in Giresun, the Southeastern Black Sea.

Microplastic studies investigating concentrations in water are numerous, but the majority of microplastics settle and are retained in sediment, and higher concentrations are regularly reported in sediments. Thus, MPs accumulation may be more threatening to benthic fish living in sediments than to pelagic fish. The presence, abundance and diversity of microplastics were investigated by collecting samples from two pelagic, European anchovy, and horse mackerel and two benthic fish species, red mullet, and whiting that are popularly consumed in Giresun province of Türkiye, located on the southern coast of the Black Sea. Visual classification and chemical compositions of microplastics was performed using a light microscope and ATR-FTIR spectrophotometry, consecutively. The overall incidence and mean microplastics abundance in sampled fishes were 17 and 1.7 ± 0.18 MP fish-1, respectively. MPs were within the range of 0.026-5mm in size. In most of the cases, the MP was black in color with 41%. With the rates of 56%, polypropylene was the predominant polymer type. The most dominant MP type was identified as fiber followed by fragments and pellets. The relationship between MP amounts in fish and Fulton condition factor was not strong enough to establish a cause-effect relationship.

Fourier-transform near-infrared spectroscopy first application to age determination in European fish species: the case of the Atlantic horse mackerel from the central Mediterranean Sea

Fourier-transform near-infrared spectroscopy (FT-NIRS) has recently been used to reduce the processing time for estimates of annual age in several fish species. The present study represents the first application of this technique to marine organisms from the European waters. Atlantic horse mackerel (Trachurus trachurus) from the central Mediterranean Sea was selected for its ecological role, its socioeconomic value, and because its age is regularly estimated by otolith reading under a stereomicroscope for stock assessment purposes. Absorption spectra of the whole otoliths were acquired by FT-NIRS across a multiyear dataset, obtained during acoustic surveys carried out in different regions of the central Mediterranean Sea. The acquired spectra were processed to optimize calibration models to predict age. The best linear models obtained by the optimizing procedure predicted age successfully with a coefficient of determination of 0.95–0.96, mean squared error of 0.5 years, and bias &amp;lt;0.03 years. Although regional calibration models were also obtained separately, the models with all regions combined appeared much more robust and encompassing the whole age range, suggesting its usefulness for the entire spatial distribution range considered in the preset study. The use of FT-NIRS allowed to successfully predict age for horse mackerel between the ages 1 and 14, with similar or better precision (and bias) of the traditional methods, also increasing the standardization by repeatability of age assignments. The preliminary results obtained by this study encourage further effort to fine-tune the calibration model for new species, in order to apply a precise, rapid, cost-effective method for stock assessment purposes of Mediterranean fish resources.

Ex situ combined in situ target strength of Japanese horse mackerel using a broadband echosounder

Ex situ combined in situ target strength of Japanese horse mackerel using a broadband echosounder

Enhancing extracellular membrane vesicle productivity of Shewanella vesiculosa HM13, a prospective host for vesiculation-mediated protein secretion, by weakening outer membrane-peptidoglycan linkage

Shewanella vesiculosa HM13, a psychrotrophic gram-negative bacterium isolated from the intestinal contents of horse mackerel, produces abundant extracellular membrane vesicles (EMVs) by budding the outer membrane. The EMVs of this bacterium carry a single major cargo protein, P49, of unknown function, which may be useful as a carrier for the secretory production of heterologous proteins as cargoes of EMVs. In this study, to increase the utility of S.vesiculosa HM13 as a host for EMV-mediated protein production, we improved its EMV productivity by weakening the linkage between the outer membrane and underlying peptidoglycan layer. In gram-negative bacteria, the outer membrane is connected to peptidoglycans predominantly through Braun's lipoprotein (Lpp), and the formation of this linkage is catalyzed by an l,d-transpeptidase (Ldt). We constructed gene-disrupted mutants of Lpp and Ldt and assessed their EMV productivity. The EMVs of the lpp- and ldt-disrupted mutants grown at 18°C were evaluated using nanoparticle tracking analysis, and their morphologies were observed using transmission electron microscopy. As a result, an approximately 2.5-fold increase in EMV production was achieved, whereas the morphology of the EMVs of these mutants remained almost identical to that of the parent strain. In accordance with the increase in EMV production, the mutants secreted approximately 2-fold higher amounts of P49 than the parent strain into the culture broth as the EMV cargo. These findings will contribute to the development of an EMV-based secretory production system for heterologous proteins using S.vesiculosa HM13 as a host.

The catch amount of Mediterranean horse mackerel Trachurus mediterraneus (Steindachner, 1868) gillnets in the Sea of Marmara

The small-scale fishermen in the coastal area of the Marmara Sea between April and June caught the Mediterranean horse mackerel Trachurus mediterraneus (Steindachner, 1868) with gillnets. This target species, T.mediterraneus and significant amounts of non-target species are caught in these nets. So, the technical and structural characteristics of the gillnets for a commercial fishermen were determined and the target and non-target species were evaluated in catching operations. The multifilament gillnet mesh size of 18 milimeters polyamid, twine thickness of 210d/2, hanging ratio of 0.33 and the total length of approximately 200 meters. Also, guarding nets were added to gillnets. The total amount was determined as 397.8 kilograms (kg) and 9204 individuals (ind). The weight of T.mediterraneus was constituted 39.3% of the total weight. The in of T.mediterraneus was constituted 43.4% of the total ind. While the catch per unit effort (CPUE) for T.mediterraneus was calculated at 0.026 kg/m.operation-1 and 0.7 ind/m.operation-1, the CPUE for the total amount was calculated at 0.066 kg/m.operation-1 and 1.5 ind/m.operation-1. The total economic value was calculated at 15814.4 Turkish Liras (TL), which 9390 TL from T.mediterraneus and 6424.4 TL from non-target species. This study is important in terms of revealing for the first time the catch efficiency of gillnets used by commercial fishermen to catch T.mediterraneus in the coastal area of the Marmara Sea, which is an important fishing area. These results will contribute to the creation of management plans and fisheries management for species-specific fishing gear used in a region.

Ecology, Anatomy, Reproduction, and Diet of the Atlantic Horse Mackerel, Trachurus trachurus: A Comprehensive Review

Ecology, Anatomy, Reproduction, and Diet of the Atlantic Horse Mackerel, Trachurus trachurus: A Comprehensive Review

The aggregation effect of offshore mussel farming on pelagic fishes

AbstractThe increase in hard artificial structures in the marine environment is contributing to ocean sprawl. As well as adding hard structure to the seabed, mussel aquaculture adds rope droppers and anchor lines to the water column, where such structure would otherwise be absent. This paper aims to monitor the effects of mussel headlines on the pelagic fish community over time, as well as to investigate whether there is an interaction between the age of cultivated mussels with the number of epibiota species and the abundance of pelagic fishes. Two surveys were carried out: a time series monitoring survey to assess whether the mussel headlines change the surrounding fish species relative to control areas over time, and a fish aggregation device effect survey to investigate whether older and larger mussels support greater abundances of pelagic fishes and epibiota. The most abundant fish species was Atlantic horse mackerel, Trachurus trachurus, with significantly greater numbers recorded around ropes growing older mussels. Results from the surveys show that the physical farm infrastructure has provided a substrate for colonisation by a variety of epibiota: A total of 21 species were recorded growing on the mussel ropes. Furthermore, the older and larger the mussels become, the greater the numbers of epibiota taxa that can colonise, coupled with a greater abundance of pelagic fish recorded around the ropes. The sustainable development of offshore Blue Industries is essential to produce renewable resources. This study brings essential evidence for marine managers and regulators that offshore mussel farming can provide benefits for pelagic and benthic species of both conservation and commercial importance while producing sustainable protein to feed a growing population.

Trophic level, niche width, and site fidelity of Moroccan forage fish in two contrasting upwelling systems

Forage fish from two distinct upwelling systems (700 km apart) off the southern Moroccan Atlantic coast were investigated using carbon (δ13C) and nitrogen (δ15N) stable isotopes to estimate their trophic position, niche width and site fidelity. Zooplankton (150 μm - 1 mm), considered as a baseline, showed similar δ15N values but significantly different δ13C values between areas. Sardine (Sardina pilchardus), chub mackerel (Scomber colias), horse mackerel (Trachurus trachurus) and anchovy (Engraulis encrasicolus) showed variable differences in trophic position and niche width within and between areas. Sardine had the lowest trophic position and horse mackerel the highest one. Differences between areas suggested an adaptive trophic behaviour. The δ13C pattern was clearly different between areas for sardine, anchovy and horse mackerel, indicating a high fidelity of these species to their feeding grounds. Chub mackerel, which had a similar trophic position between areas, appeared to be a highly mobile species. In this study, we provide an unprecedented insight into the trophic and migratory behaviour of forage fish in Moroccan waters by comparing four species using stable isotope analysis.

Diet composition of the Mediterranean horse mackerel, Trachurus mediterraneus (Steindachner, 1868) (Osteichthyes: Carangidae), from the Aegean Sea

Data on feeding habits in aquatic ecosystems are of great importance in determining the role that a certain fish species plays in its habitat and in related ecosystems. In this study, the diet composition of Mediterranean horse mackerel, Trachurus mediterraneus was investigated for 728 specimens from the central Aegean Sea to compare our data with those from other regions of the Mediterranean Sea and throughout all four seasons. Catches from five major groups were identified. Crustaceans (particularly copepods) proved to be the most important food item considering the index of relative importance (IRI). At least 58 different copepod species were identified. Abundant copepod species that occur in every season were Corycaeus sp., Oncaea media, Oncaea spp., Isias clavipes, Euterpina acutifrons and Oithona nana. Isias clavipes occurred only in spring, with all of them appearing in the diet with a %IRI &gt;10. Although found in a relatively smaller quantity, teleost larvae ranked as the second most important prey in the overall diet, with increasing quantities in fish larger than 18.0 cm.

Predictive Model for the Nematode (Hysterothylacium aduncum) in Horse Mackerel, Trachurus trachurus From the Black Sea

Hysterothylacium aduncum is a parasitic nematode that infects mainly marine fish. The information on the heterogeneity in the aggregation of macroparasites in fish species is still limited, particularly for the Raphidascarid nematode H. aduncum that infects exploitable marine fish species including horse mackerel (Trachurus trachurus). This study aimed to investigate the heterogeneity of the distribution of H. aduncum to understand macroparasite aggregation better in marine fish. Weibull tests comprising Maximum likelihood were used to analyze the frequency distribution of parasites within a fish host population over the three years period. The parasite, H. aduncum (third larval stage) prevalence was found to be 88% and the condition factor was 1.30∓0.029 in un-infected fish and 1.12∓0.022 in infected fish. The clustered pattern was observed in H. aduncum in horse mackerel. The relation between parasite load and the fish condition factor was found to be significant and conformity of length and weight was affected by parasite load. It is the first time that aggregation has been observed in H. aduncum distribution and made forecasts of nematode intensity in horse mackerel. The findings related to the large individual variations suggest that this pattern is significant and should be considered for host-parasite dynamics.

Assessment of Quality of Smoked Fish Using Briquettes Crafted from Rice Husks and Fruit Peels

ABSTRACT The quest for alternative smoking fuels, beyond traditional wood, is essential to enhance the quality of smoked fish. This research focuses on evaluating the smoked fish quality achieved with briquettes derived from various sources: rice husks (53%) (BriqRi); pineapple peel (53%) (BriqAn); a combination of rice husks (18%) and pineapple peel (19%) (BriqRiAn); pineapple (19%) and orange peel (18%) (BriqAnO); and a composite blend of all three fuels (18% each) (BriqRiAnO). A total of 60 units each of horse mackerel (Trachurus trachurus) and mackerel (Scomber scombrus) underwent smoking using five different types of briquettes. The evaluation encompassed both physicochemical and sensory parameters of the smoked fish, along with an analysis of polycyclic aromatic hydrocarbons (PAH) contents. Significantly, higher weight losses post-smoking (p < 0.05) were observed in fish smoked with BriqAnO and BriqAn briquettes. The sensory evaluation conducted by a panel indicated that BriqRiAnO briquettes produced fish with the highest scores (p˂ 0.05). Furthermore, fish smoked with BriqRi rice husk briquettes exhibited the lowest levels of PAHs, whereas fish smoked with BriqAn pineapple peel briquettes showed the highest levels for most PAHs. Notably, no Benzo[a]pyrene (BaP) hydrocarbon was detected in fish smoked using any of the briquettes. These findings suggest that briquettes derived from agricultural residues hold promise for enhancing fish smoking techniques in Benin.

Southern Horse Mackerel (Trachurus trachurus) Spatio-Temporal Distribution Patterns Based on Fine-Scale Resolution Data

In this study, the distribution patterns of southern horse mackerel are examined using commercial fine-scale resolution data. Using landings by size category and VMS data from the Portuguese commercial bottom-trawl fishery, which consistently targets horse mackerel, this study provides a comprehensive analysis of horse mackerel age distributions spanning a decade (2010–2020). Importantly, this study addresses potential biases in commercial effort data and establishes the usefulness of commercial bottom-trawl gear as a suitable method for sampling and evaluating southern horse mackerel stock dynamics. Ordered regression models were applied to allow for the modelling of the distribution of multiple age categories and investigate spatio-temporal migrations off the Portuguese coast. Southern horse mackerel show a widespread age distribution range and stable abundance with indications of seasonal and spatial patterns in the distribution of specific age groups. The insights derived from this research contribute valuable knowledge for understanding the dynamics and distribution patterns of fish populations.

Stock identification of the Mediterranean horse mackerel (Carangidae: Trachurus mediterraneus) in the Marmara and Black Seas using body and otolith shape analyses

The Mediterranean horse mackerel (Trachurus mediterraneus) has been managed as a single stock in the Black Sea and adjacent regions, and its genetic structure has been under debate for decades, emphasising the necessity for additional research to validate the stock structure. This study used geometric morphometrics for body shape, shape indices, and elliptical Fourier analysis for otolith shape to explore their morphological differences in the Eastern Black Sea, Middle Black Sea, and Sea of Marmara. The findings revealed considerable differences in body and otolith shapes across the examined regions, suggesting the existence of three separate stocks. The geometric morphometrics revealed evident differences in the snout, followed by the caudal peduncle and body depths. Both otolith shape indices and elliptic Fourier analysis revealed significant directional bilateral asymmetry between the left- and right-sided otoliths. The elliptic Fourier analysis revealed a non-overlapping surface difference of 2.12% between the reconstructed left and right otolith outline shapes. However, no significant differences in otolith shape were observed between males and females using either otolith side. In addition, otolith shape analysis using shape indices and elliptic Fourier analysis reliably supported the presence of three distinct stocks of T. mediterraneus. This study provides evidence supporting the recognition of multiple phenotypic stocks of T. mediterraneus.

Alternative Approach to the Segmentation of Fishing Fleets

The appropriate segmentation of fishing fleets is controversially discussed in fisheries research and management and a variety of approaches has been introduced. The present approach, developed in a pilot study funded by the European Commission – Data Collection Framework (DCF), introduces a standardized multivariate approach for characterizing fisheries fleet segments by hierarchical agglomerative cluster analysis (HAC) of their catch composition. We chose data from 2021 of the Romanian fishing fleet as the basis of our analysis. Statistical analyses were performed using the program RStudio V3.6.1 by running the fleet segmentation package script. The specific indices, tests, and visual validation methods of the package were applied to determine the optimal number of clusters. The procedure was finalized by a post-hoc validation of the clustering result to identify the actual fleet segments. From the basic data, 6 fleet segments for Vessels using active and passive gears (PMP) were highlighted, representing 52 boats, where it was noted that fishing at Rapa whelk (RPW) prevailed with 91.94% of the total catches on the segment, respective 5 fleet segments for Vessels using passive gears (PG) only for vessels 12m, representing 78 vessels where the main catches or recorded at European anchovy (ANE) 25.16%, turbot (TUR) 13.08%, horse mackerel (HMM) 8.75%, thus 130 vessels from two classes of different gears in total. We detected mied fishing, especially on various assemblages of demersal and pelagic fish, as well as target fishing on demersal and pelagic fish, Rapa whelk, and mussels. For a better understanding of the approach, further research is needed.

СЦЕНАРНЫЙ ПРОГНОЗ РАЗВИТИЯ СЫРЬЕВОЙ БАЗЫ РЫБОЛОВСТВА И УЛОВОВ РЫБ В АЗОВСКОМ МОРЕ В УСЛОВИЯХ СОКРАЩЕНИЯ ОБЪЕМОВ ПРЕСНОВОДНОГО СТОКА И РОСТА СОЛЕНОСТИ

Background. The reduction in freshwater runoff and the increase in the Azov Sea salinity are accompanied by a drastic transformation of aquatic biocenoses, as well as restructuring of various ecological groups of the ichthyofauna. Abrupt changes in the composition and abundance of fishing targets render traditional approaches to fishing ineffective and dictate the need to develop new kinds of fishery. Relevance. Identification of possible scenarios of the fishery resource development for the next 5–10 years is necessary to ensure the fisheries sustainability in the Azov Sea Basin. The aim of this work is to analyze the dynamics of the composition of commercial fish catches in the Azov Sea in the modern period of the sea salinization and to develop possible status scenarios for the stocks and catches of fishing targets for the next 3–10 years to substantiate fisheries management and regulation. Methods. In the course of developing such scenarios, the data on the actual dynamics and trends in the fishery resource changes during the comparable periods have been used, as well as the data on the ecological valence of the representatives of various ecological groups of fish at different stages of their ontogenesis in terms of their salinity tolerance. Results. 3 main unequally probable scenarios of changes in the abundance and biomass of various ecological groups of fish — primary industrial-scale fishing targets in the Azov Sea — have been developed; the recommendations for adapting the existing fishing practices to the changes in the fishery resources have been given. Conclusion. A further decrease in the commercial importance is predicted for the freshwater fish species, freshwater-spawning anadromous and semi-anadromous fish species, as well as for gobies and Black and Caspian Sea sprat (tyulka). The role of Black Sea migrants — European anchovy, grey mullets, red mullet, Mediterranean horse mackerel, garfish — will be reduced. Marine fish species — acclimatized so-iuy mullet and Black Sea turbot (kalkan) — will become the main fishing targets.

Morphometrical characters of Atlantic horse mackerel Trachurus trachurus (Linnaeus, 1758), in the North Atlantic zone of Morocco

The Atlantic Horse mackerel Trachurus trachurus (Linnaeus, 1758) is subject to considerable fishing pressure. under strong fishing pressure, the objective of the research is to establish the species morphological characterization: the growth model, sex-ratio and the body condition factor, using standard morphometric methods and truss network analysis. 1494 samples were collected from the North Moroccan Atlantic coast, sampling was carried out from July 2021 to July 2022 at the port of Tangier and Larache (35°47, 33°89), indeed individuals total length measured between10 and 41 cm and the body weight presented between 35 and 500 g, All morphometrical analyses showed similar results, The values for males, females and the total sample showed that the growth of T. trachurus was minor, which that mean the weight grows less quick than the length, The condition factor was calculated indicating the smallest values were observed in the range of Total length between 10 and 19 cm.