rss_2.0Sciendo RSS Feed for Oceanological and Hydrobiological Studieshttps://sciendo.com/journal/OANDHShttps://www.sciendo.comhttps://sciendo-parsed.s3.eu-central-1.amazonaws.com/6472618b215d2f6c89dc6424/cover-image.jpghttps://sciendo.com/journal/OANDHS140216https://sciendo.com/article/10.26881/oahs-2024.2.02<abstract> <title style='display:none'>Abstract</title> <p>In this study, the collected fish species were identified based on morphological observations and then evaluated by DNA barcoding. The COI gene has been recognized as a biological marker for fish species identification and the objective of this study is to analyze the variable region of the COI gene in subunit I. The mitochondrial cytochrome (COI) oxidase subunit I gene was analyzed as a suitable molecular maker for the identification of three specimens of the fish species <italic>Hipposcarus harid</italic>, widely distributed in the Red Sea. The COI gene sequences in the variable region revealed variations among the fish species. The COI gene sequences in the variable region were similar to the variable region of <italic>Hipposcarus harid</italic> collected from the Northern Red Sea and all three were named: <italic>H. harid</italic> H13, <italic>H. harid</italic> H2c, and <italic>H. harid</italic> H12. The identification of the fish species collected from the Red Sea in Saudi Arabia would help ichthyologists improve the management, conservation and monitoring of economically important long-nose parrotfish species in Saudi Arabia.</p> </abstract>ARTICLEtruehttps://sciendo.com/article/10.26881/oahs-2024.2.022024-07-05T00:00:00.000+00:00https://sciendo.com/article/10.26881/oahs-2024.2.09<abstract> <title style='display:none'>Abstract</title> <p>The purpose of this study is to assess heavy metal and selenium pollution in water and sediment of Lake Eğirdir using some indices. The water and sediments have the highest content of Fe. According to Water Quality Index (WQI) results, the lake water is in the good category, while the low pollution category depends on HPI and HEI values. The Enrichment Factor (EF) showed that the sediments contained very high, extremely high and significant levels of Pb, Cr, Cu, Mn, Ni and Fe. The Geoaccumulation Index (I_geo) revealed that Lake Eğirdir was not polluted with Cr, Cu, Fe, Mn, Mo, Ni and Zn. Based on the results of the Contamination Factor (CF), Cr, Cu, Fe, Mn, Mo, Ni and Zn were in the low contamination category. The results of The Pollution Load Index (PLI) for lake sediments indicated no contamination for all metals in all seasons. Sediment quality guidelines were used to determine the possible risk of heavy metal contamination of sediments, and the results show that Cd and Pb were at the minimal effect threshold (MET), while Cr, Cu, Ni and Zn were at the lowest effect levels (LEL). These results indicate that precautions should be taken to prevent an increase in metal pollution and reduce the existing pollution.</p> </abstract>ARTICLEtruehttps://sciendo.com/article/10.26881/oahs-2024.2.092024-07-05T00:00:00.000+00:00https://sciendo.com/article/10.26881/oahs-2024.2.08<abstract> <title style='display:none'>Abstract</title> <p>Climate change is having a major impact on species distribution and habitat loss, especially for species with restricted ranges. The genus <italic>Seminemacheilus</italic> is endemic to Türkiye and includes six species. This study investigated the current distribution of the genus <italic>Seminemacheilus</italic> and its possible distribution in 2050 and 2070 using the Wallace platform, a Maxent modeling method. Simulations of future projections indicated that bioclimatically suitable habitats of <italic>Seminemacheilus</italic> spp. will be limited in 2050 and nearly extinct in 2070. The model is primarily affected by temperature and precipitation, which are directly associated with the phenomenon of global warming. It has been established that conservation strategies must be developed to protect the species of the genus and avoid habitat deterioration.</p> </abstract>ARTICLEtruehttps://sciendo.com/article/10.26881/oahs-2024.2.082024-07-05T00:00:00.000+00:00https://sciendo.com/article/10.26881/oahs-2024.2.06<abstract> <title style='display:none'>Abstract</title> <p>In this study, predictions were made on the growth performance of <italic>Alburnus sellal</italic> Heckel, 1843 from the Munzur River using back propagation artificial neural networks and ANN algorithms. Statistical growth models used in fish biology and results obtained from artificial neural networks were compared. A total of 239 samples were used in this comparison. It was determined that the population is distributed across age groups 0–VII. The relationship between length and weight was calculated as W = 0.0046L^3.198 for all individuals. The von Bertalanffy growth parameters were calculated for all individuals: L_t = 21.93 [1 – e^{–0.158 (t + 2.11)}]; W_t = 102.29 [1 – e^{–0.158 (t + 2.11)}]^3.198. The growth performance index (Ф’) value was 1.880 for all individuals. The condition factor varied between 0.479 and 1.115 for females and between 0.533 and 1.076 for males. The Mean Absolute Percent Error (MAPE) statistic was used, which is a widely used method to measure the accuracy of the predictions made. It was determined that ANNs MAPE (%) values were better than MAPE values calculated for the length–weight relationship and von Bertalanffy growth function models for <italic>A. sellal</italic>. This study shows that ANNs can be used as an alternative useful method for predicting population parameters. ANN models are therefore an effective tool to describe fish growth parameters. They have been found to be a useful predictive tool. The developed models can be used to predict future sustainable fish management.</p> </abstract>ARTICLEtruehttps://sciendo.com/article/10.26881/oahs-2024.2.062024-07-05T00:00:00.000+00:00https://sciendo.com/article/10.26881/oahs-2024.2.03<abstract> <title style='display:none'>Abstract</title> <p>Only one species of the genus <italic>Paradiplozoon</italic> (Akmerov 1974) has so far been recorded in <italic>Vimba vimba</italic> (Linnaeus, 1758) from Türkiye. This study was planned to improve the recording of the occurrence of diplozoids in <italic>V. vimba</italic> from a pristine area in a different geographical region. A total of 397 specimens of <italic>V. vimba</italic> were collected from Lake Köyceğiz by commercial fishermen over a period of one year and examined for the presence of diplozoids. Only one species of <italic>Paradiplozoon</italic> was found. Following a detailed morphological examination, the species was identified as <italic>Paradiplozoon bliccae</italic> (Reichenbach-Klinke 1961), which was subsequently confirmed by molecular data. A total of 1025 specimens of <italic>P. bliccae</italic> infected 185 of the 397 <italic>Vimba vimba</italic> specimens examined, with prevalence, mean intensity and abundance of 46.6%, 5.5 ± 4 parasites/fish, 2.5, respectively. The highest prevalence and mean abundance were determined in spring, while mean intensity values were higher in summers. Female hosts showed higher prevalence, mean intensity and mean abundance than males.</p> <p>This is the first report on the diplozoid <italic>P. bliccae</italic> from the locality and the first molecular characterization of <italic>P. bliccae</italic> from <italic>V. vimba</italic> in Lake Köyceğiz. This study adds to the geographical range of the species.</p> </abstract>ARTICLEtruehttps://sciendo.com/article/10.26881/oahs-2024.2.032024-07-05T00:00:00.000+00:00https://sciendo.com/article/10.26881/oahs-2024.2.04<abstract> <title style='display:none'>Abstract</title> <p>The paper provides an overview of all freshwater red algae species recorded to date in the territory of Bosnia and Herzegovina. Based on fieldwork and analysis of all available previously published data, it was determined that a total of 15 taxa from eight genera have been recorded to date: <italic>Bangia</italic> (1), <italic>Audoinella</italic> (3), <italic>Batrachospermum</italic> (2), <italic>Peludicola</italic> (1), <italic>Shaethia</italic> (1), <italic>Lemanea</italic> (4), <italic>Paralemanea</italic> (2) and <italic>Hildenbrandia</italic> (1). All taxa were found in clear, cold, well-oxygenated water. Bosnia and Herzegovina is very rich in different types of aquatic habitats. More than 100 sites were visited during the field research, but there are still many potential habitats where freshwater red algae can be found, which will be explored in the coming years. This work is the first step toward establishing long-term monitoring and listing of protected and threatened red algae in Bosnia and Herzegovina.</p> </abstract>ARTICLEtruehttps://sciendo.com/article/10.26881/oahs-2024.2.042024-07-05T00:00:00.000+00:00https://sciendo.com/article/10.26881/oahs-2024.2.10<abstract> <title style='display:none'>Abstract</title> <p>The saddle seabream, <italic>Oblada melanura</italic>, is an important species in Mediterranean coastal fisheries. The artisanal gillnet fishery on Tunisia’s northern coast was sampled on a monthly basis between April 2015 and March 2016. The sex ratio varied by month throughout the year, with females dominating from November to December and equal sex ratios during the rest of the year. For both sexes, gonad maturity and gonadosomatic index (I_G) indicated that spawning occurs from May to September. In terms of energy investment, fish feed throughout the year. During the spawning period (May to September), gonadal production (I_G) appears to be supported by liver reserves (I_H). These reserves came from external sources (i.e. food) in the period before spawning. During the spawning period, it was necessary for the fish to continue feeding in order to support their body development. Estimated lengths at 50% maturity were similar for females (L₅₀ = 17.14 cm) and males (L₅₀ = 17.01 cm).</p> </abstract>ARTICLEtruehttps://sciendo.com/article/10.26881/oahs-2024.2.102024-07-05T00:00:00.000+00:00https://sciendo.com/article/10.26881/oahs-2024.2.01<abstract> <title style='display:none'>Abstract</title> <p>The population dynamics of <italic>Polititapes aureus</italic> from Tunisia were investigated monthly during a one-year period (2018). The possible future commercial benefits of the species as a significant resource of artisanal fisheries require better knowledge of its population dynamics. This study provides the first insight into population parameters by investigating its population structure, growth, mortality, and exploitation rate. Allometric relationships between body size and length were determined. The shell length/ total weight ratio indicated a positive allometric growth and was expressed as <italic>TW</italic> = 0.0002 SL3.103. Length frequency data were analyzed to estimate population parameters using FiSAT ΙΙ software. <italic>P. aureus</italic> showed lower growth rate (<italic>K</italic> = 0.46 yr^–1) and asymptotic length (<italic>L</italic>_∞ = 38.80) compared to those obtained for other bivalve species (mean values: <italic>K</italic> = 0.61 and <italic>L</italic>_∞ = 55.02). Longevity (<italic>T</italic>_max) and the growth performance index (φ’) were 7.95 yr^-1 and 2.84, respectively. Total mortality (<italic>Z</italic>) was estimated from the length-converted catch curve at 0.85 yr^-1 and fishing mortality (<italic>F</italic>) at 0.03 yr^-1. Both values of natural mortality (<italic>M</italic> = 0.82 yr^-1) derived from bivalve literature and based on Pauly’s (1980) empirical equation (<italic>M</italic> = 0.83 yr^-1) developed for fish were comparable. The most intensive growth occurred during the first three years. The data presented herein are crucial for appropriate fisheries management and conservation of clams.</p> </abstract>ARTICLEtruehttps://sciendo.com/article/10.26881/oahs-2024.2.012024-07-05T00:00:00.000+00:00https://sciendo.com/article/10.26881/oahs-2024.2.07<abstract> <title style='display:none'>Abstract</title> <p>Sustainable management and conservation strategies are crucial for any species of <italic>Gerreidae</italic>. Without comprehensive research on population biology, maintaining a balance between having healthy natural stocks and the socio-economic benefit of fisheries is difficult. Therefore, we studied some aspects of the biology of <italic>Gerres longirostris</italic> based on 474 specimens collected from the Red Sea (Jeddah coast, Saudi Arabia). The overall sex ratio of males to females was found to be 1:1.52, which was significantly different from the expected ratio of 1:1 (<italic>p</italic> &lt; 0.05). Histological analysis of ovaries and testes and monthly variations in GSI values for <italic>G. longirostris</italic> indicated that spawning occurs between March and June, with a peak in GSI in May, and the trend was similar for both sexes. Size at 50% sexual maturity was estimated at 19.8 cm for females and 20.2 cm for males. The maximum batch and relative fecundity were estimated at 315,210 ova, 10,832 ova/cm, and 1068 ova/g, respectively. Batch fecundity and relative batch fecundity were significant correlated with total length (TL, cm) and body weight (BW, g) at <italic>p</italic> &lt; 0.05. Histological examination of gonads revealed that their maturation in this species is asynchronous, with different developmental stages of oocytes at the same time, which indicates that the species is a multiple-batch spawner with indeterminate fecundity.</p> </abstract>ARTICLEtruehttps://sciendo.com/article/10.26881/oahs-2024.2.072024-07-05T00:00:00.000+00:00https://sciendo.com/article/10.26881/oahs-2024.2.05<abstract> <title style='display:none'>Abstract</title> <p>The present paper is the first document on heavy metal levels in the European eel (<italic>Anguilla anguilla</italic>) collected from the Gediz Delta in the Eastern Aegean (Türkiye). In this study, concentrations of Cd, Cu, Zn and Pb were determined in the liver, gills, and muscle tissues of <italic>A. anguilla</italic> eels. Sixty dead eels were obtained between June 2015 and January 2016, and their total size and weight were measured. Heavy metal accumulation levels in edible muscle tissue of the eels were compared with national and international standards, and Estimated Weekly Intake (EWI), Target Hazard Quotient (THQ), and Total Target Hazard Quotient (Σ THQ) were calculated. It was determined that metal concentration levels in <italic>A. anguilla</italic> follow the sequence of Zn &gt; Cu &gt; Pb &gt; Cd. Zn has the highest concentration in all sampling periods and in all tissue types. It was found that Σ THQ was below 1 and amounted to 0.41. This result shows that there is no carcinogenic risk associated with the consumption of <italic>A. anguilla</italic> in adults.</p> </abstract>ARTICLEtruehttps://sciendo.com/article/10.26881/oahs-2024.2.052024-07-05T00:00:00.000+00:00https://sciendo.com/article/10.26881/oahs-2024.1.03<abstract> <title style='display:none'>Abstract</title> <p>The trophic status of the Berdan River Basin was determined using univariate and multivariate classification tools. The results indicated that the water quality/trophic status of a downstream section of the Berdan River was characterized as “poor/eutrophic” due to anthropogenic inputs from agricultural, industrial and domestic wastewater discharges. Strong and positive correlations between TRIX values and concentrations of eutrophication parameters suggest that nutrient enrichment of water in the Berdan River during its flow will result in further eutrophication in the coastal region of the NE Mediterranean Sea. Therefore, the trophic and pollution status of the Berdan River, as well as other regional rivers flowing into the coastal area of the NE Mediterranean Sea should be monitored to develop action plans and sustainable management of eutrophication in regional rivers and the oligotrophic Mediterranean Sea.</p> </abstract>ARTICLEtruehttps://sciendo.com/article/10.26881/oahs-2024.1.032024-04-01T00:00:00.000+00:00https://sciendo.com/article/10.26881/oahs-2024.1.05<abstract> <title style='display:none'>Abstract</title> <p>Although integrated multi-trophic aquaculture (IMTA) is recognized as a strategy to control and minimize the impact of fish farming on the marine environment, there are still many unknowns when it comes to this type of farming. This paper presents the results of research on the growth of European flat oysters in IMTA and monoculture systems. Growth was monitored at three different sites: near fish cages, 100 m from fish cages, and in a monoculture system, during an 18-month experiment. The highest mortality occurred at the site near the fish cages. At the end of the experiment, all monitored individuals reach commercial size, except for four individuals at the site near the fish cages. There were statistically significant differences in oyster growth with respect to site and period. At the site near the fish cages, oyster growth was significantly lower compared to the growth at the two other sites. The most intense growth of oysters occurred during the spring and early summer period. Our results indicate that the production cycle of oysters in integrated aquaculture and monoculture is quite similar and that sites directly adjacent to fish cages should be avoided for oyster farming.</p> </abstract>ARTICLEtruehttps://sciendo.com/article/10.26881/oahs-2024.1.052024-04-01T00:00:00.000+00:00https://sciendo.com/article/10.26881/oahs-2024.1.01<abstract> <title style='display:none'>Abstract</title> <p>This study aimed to compare the nutrient compositions and element contents of meagre (<italic>Argyrosomus regius</italic>) reared in different environments. The biochemical analyses revealed that the ash contents of cage and earth pond-cultured fish were higher than that of wild fish (<italic>p</italic> &lt; 0.05), while there were also significant differences in the protein, fat and moisture contents (<italic>p</italic> &gt; 0.05). The cage-reared fish had the lowest Ca, Mg, P and S levels, while the highest levels were determined in wild fish. The highest Fe, Se and Mn levels were determined in the earth pond-reared fish. Wild fish had the lowest Fe, Zn, Se and Cr levels, while the lowest Cu and Mn levels were determined in the cage-reared fish. The cage-reared fish had the highest Zn, Cr and Ni levels. Wild fish were determined to contain high levels of As, Hg and Pb. The earth pond-reared fish had a high Cd level, while having lower As and Hg levels than those of fish reared in other environments. As a result, farmed meagre are thought to be affected by the metal content in both the feed and the water. The results of the study showed that the content of the meagre flesh varied depending on the rearing conditions.</p> </abstract>ARTICLEtruehttps://sciendo.com/article/10.26881/oahs-2024.1.012024-04-01T00:00:00.000+00:00https://sciendo.com/article/10.26881/oahs-2024.1.04<abstract> <title style='display:none'>Abstract</title> <p>Porcelain disease, caused by the parasite <italic>Astathelohania contejeani</italic>, is a fatal disease for freshwater crayfish. Previously published data provide information on the occurrence of <italic>A. contejeani</italic> in various crayfish species. However, its prevalence in host populations remains largely undetermined. This issue is relevant to the narrow-clawed crayfish <italic>Pontastacus leptodactylus</italic>, a species of high commercial value in Eastern Europe. A single published report addressed a potential microsporidia infection in <italic>P. leptodactylus</italic>, but without specific data on geographical location and prevalence. We present the first detailed information on the prevalence of <italic>A. contejeani</italic> in the <italic>P. leptodactylus</italic> population from Lake Losvido, including an assessment of the infection rate through both visual and molecular assessment. <italic>Astathelohania contejeani</italic> was observed in 1.56% of 128 crayfish examined visually. Of the 37 asymptomatic crayfish samples analyzed, 29.7% were found to be carriers. This finding suggests that parasitism of <italic>A. contejeani</italic> occurs frequently in the <italic>P. leptodactylus</italic> population in Lake Losvido prior to the manifestation of observable disease symptoms.</p> </abstract>ARTICLEtruehttps://sciendo.com/article/10.26881/oahs-2024.1.042024-04-01T00:00:00.000+00:00https://sciendo.com/article/10.26881/oahs-2024.1.02<abstract> <title style='display:none'>Abstract</title> <p>The present study investigated the reproductive biology of European anchovies obtained seasonally from fishermen in İzmir Bay (Aegean Sea). The total length range of the investigated individuals was 9.0 – 15.7 cm. Of the 750 samples in which sex was determined, 34% were males, and 66% were females, resulting in a female-to-male ratio of 1.91:1. The first maturation length was determined to be 10.47 cm for females and 9.95 cm for males. Based on the total values of the gonadosomatic index, it was concluded that the reproductive period of the species falls in the summer season. The batch fecundity of the species ranged from 2.123 to 6.951 oocytes, and the fecundity–length relationship was expressed as F = 1134.4TL – 10034 (R² = 0.84). Histological examination of the female ovaries revealed the presence of oocytes at different stages of development, indicating multiple spawning during the reproductive season.</p> </abstract>ARTICLEtruehttps://sciendo.com/article/10.26881/oahs-2024.1.022024-04-01T00:00:00.000+00:00https://sciendo.com/article/10.26881/oahs-2024.1.06<abstract> <title style='display:none'>Abstract</title> <p>Lake Nasser is a freshwater lake that supplies over 95% of Egypt’s freshwater budget. Therefore, the quality of water in the lake is critical for its conservation. In addition to assessing the metal pollution load, the quality of water and sediment in the lake was assessed by collecting water and sediment samples for metal content analysis. Lake Nasser is a warm monomictic water body with a single circulation cycle in the cold months. Dissolved oxygen content in bottom water samples often dropped significantly to levels below international guidelines, reflecting reduced rates of photosynthetic activity. Although 50% of the lake’s water samples contained Pb concentrations slightly above the World Health Organization’s (WHO) limit for drinking water, the metal pollution index did not exceed the critical level and was classified as low metal water pollution. Based on the geoaccumulation index (I-geo), the enrichment factor (EF) and the pollution load index, the sediments of Lake Nasser are practically uncontaminated with metals. Ni has the highest EF and I-geo values, while Ni and Cd contributed the most to the ecological risk and toxic risk index. The obtained results revealed that Cd and Ni in the sediments may pose a threat to organisms living in Lake Nasser.</p> </abstract>ARTICLEtruehttps://sciendo.com/article/10.26881/oahs-2024.1.062024-04-01T00:00:00.000+00:00https://sciendo.com/article/10.26881/oahs-2024.1.09<abstract> <title style='display:none'>Abstract</title> <p>The main risks to the sustainability of Mediterranean mussel farming in Greece were assessed using a generic framework derived from the AS/NZS ISO 31000:2009 Risk Management Model. Risk management scenarios were reviewed after they were successfully tested in the field by semi-qualitative/quantitative data generation protocols. A critical synthesis of the results identifies key indicative aspects needed by stakeholders to formulate a valid operational risk management plan for the sector.</p> </abstract>ARTICLEtruehttps://sciendo.com/article/10.26881/oahs-2024.1.092024-04-01T00:00:00.000+00:00https://sciendo.com/article/10.26881/oahs-2024.1.08<abstract> <title style='display:none'>Abstract</title> <p>In this study, zebra mussels (<italic>Dreissena polymorpha</italic>) were exposed to advanced biological wastewater treatment plant effluent (ABWTPE) for 96 h. At the end of the 96th hour, antioxidant parameters such as superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GP_X), glutathione S-transferase (GST), malondialdehyde (MDA) and glutathione (GSH) were examined. The objective of the study was to identify biomarkers that are useful for assessing the potential toxic effects of ABWTPE in freshwater environments. We observed an increase in GP_X, SOD activity and MDA levels, and a decrease in CAT, GST activity and GSH levels. The results obtained in our study showed that the measured biochemical parameters (GSH, MDA, SOD, CAT, GP_X and GST) are useful biomarkers in determining the possible toxicity of ABWTPE in aquatic environments.</p> </abstract>ARTICLEtruehttps://sciendo.com/article/10.26881/oahs-2024.1.082024-04-01T00:00:00.000+00:00https://sciendo.com/article/10.26881/oahs-2024.1.07<abstract> <title style='display:none'>Abstract</title> <p>The study investigated the inter-annual and seasonal population dynamics, as well as the feeding habits of the western tubenose goby <italic>Proterorhinus semilunaris</italic> in an invaded river close to its natural range (Dnieper River basin). Material was collected monthly in 2015–2016 and 2018 at one sampling site located in the Stugna River, at a distance of 1100 m from the point where it enters the Kaniv reservoir. Catch-per-unit-efforts (CPUE) of this species at the sampling site varied considerably, both between different months within a given year and between the analyzed years, from 1.1 to 127.1 fish 100 m^-2. Peak abundances were observed in July in both 2015 and 2018, and then dropped sharply in the following months. The western tubenose goby is characterized by a protracted spawning season, lasting from April to July. A total of 50 prey taxa were recorded in the diet of the western tubenose goby at the sampling site, among which chironomids were the most abundant and most frequently encountered, followed by cladocerans. This gobiid at the sampling site preyed mainly among submerged vegetation, where phytophilous chironomids were the most important prey.</p> </abstract>ARTICLEtruehttps://sciendo.com/article/10.26881/oahs-2024.1.072024-04-01T00:00:00.000+00:00https://sciendo.com/article/10.26881/oahs-2024.1.10<abstract> <title style='display:none'>Abstract</title> <p>Morphological features of sagittal otoliths in <italic>Pagellus acarne</italic>, <italic>P. bogaraveo</italic>, and <italic>P. erythrinus</italic> samples collected from the Aegean Sea were used to assess the variability both between <italic>Pagellus</italic> species and between otolith pairs employing scanning electron microscopy (SEM) and contour shape analysis. Twenty-one otolith morphological characters were compared in detail using SEM analysis. Twelve of these characters differ between <italic>Pagellus</italic> species and are suitable for distinguishing between the three congeneric <italic>Pagellus</italic> species. Wavelet functions of otolith contour shape were compared for six <italic>Pagellus</italic> groups. The wavelet functions obtained from the contour shape analysis showed high variability in the antero-dorsal, postero-dorsal, and antero-ventral regions of otoliths among the six groups analyzed. The results of principal component analysis (PCA) of the wavelet data provided a clear distinction between the groups under study. Cluster analysis supported the PCA results and basically divided them into two main branches. One of these branches contained only <italic>P. erythrinus</italic>, while <italic>P. acarne</italic> and <italic>P. bogaraveo</italic> were present in the other branch. This is the first study to provide detailed morphological characters and wavelet analysis of left- and right-side otoliths in these three congeneric <italic>Pagellus</italic> species from the Aegean Sea.</p> </abstract>ARTICLEtruehttps://sciendo.com/article/10.26881/oahs-2024.1.102024-04-01T00:00:00.000+00:00en-us-1