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Articles 1 - 30 of 2109
Full-Text Articles in Zoology
Zoonotic Fish Parasites That Pose Risks To Human Health In Türkiye, Ahmet Özer
Zoonotic Fish Parasites That Pose Risks To Human Health In Türkiye, Ahmet Özer
Turkish Journal of Zoology
Fish-borne zoonotic diseases have been documented as the causative agents of considerable problems for humans on a global scale. This paper, for the first time, reveals the current zoonotic parasites of fish from wild and cultured hosts in marine, freshwater, and aquarium environments, as well as in native, endemic, and introduced hosts across different geographical areas and seas in Türkiye, based on published data to date. According to the latest global reports, zoonotic fish parasites in Türkiye are dominated by nematodes (17 species), trematodes (11 species), and cestodes (four species), followed by acanthocephalans (two species) and myxozoans (two species). The …
Revealing Cryptic Lineage Diversity In The Persian Gulf And Oman Sea Groupers (Perciformes: Epinephelidae): Phylogenetic And Species Delimitation Insights, Ehsan Damadi, Faezeh Yazdani Moghaddam, Masoumeh Gholipour Cheshm Gilak, Mehdi Ghanbarifardi
Revealing Cryptic Lineage Diversity In The Persian Gulf And Oman Sea Groupers (Perciformes: Epinephelidae): Phylogenetic And Species Delimitation Insights, Ehsan Damadi, Faezeh Yazdani Moghaddam, Masoumeh Gholipour Cheshm Gilak, Mehdi Ghanbarifardi
Turkish Journal of Zoology
Groupers (Epinephelidae) are a taxon of great commercial interest due to their large body size and high market value, and are also an important ecological species for biodiversity conservation in coral reef ecosystems. Despite their importance, phenotypic convergence among species generally leads to incorrect taxonomic identification, an issue enhanced by molecular studies revealing the presence of a high cryptic diversity and complicating conventional systematic frameworks. Herein, grouper species diversity in the ecologically heterogeneous Persian Gulf and Oman Sea was investigated to resolve taxonomic ambiguities and assess patterns of cryptic diversity. Mitochondrial COI gene sequencing was used in conjunction with integrative …
Otolith Morphological Variations Reveal Intraspecific Diversity In Two-Spot Barb, Pethia Ticto (Hamilton, 1822), Inhabiting The Riverine Ecosystem, Insha Hassan, Lubna Yasmeen, Mohd Sadiq, Ameer Hamza, Mohammad Afzal Khan
Otolith Morphological Variations Reveal Intraspecific Diversity In Two-Spot Barb, Pethia Ticto (Hamilton, 1822), Inhabiting The Riverine Ecosystem, Insha Hassan, Lubna Yasmeen, Mohd Sadiq, Ameer Hamza, Mohammad Afzal Khan
Turkish Journal of Zoology
The intraspecific variation in otolith wavelet coefficients, contours, and morphometric variables (six size and nine shape indices) was analyzed to discriminate stock variation in Pethia ticto collected from four selected sites along the River Ganga (Narora, Kanpur, Varanasi, and Bhagalpur). The wavelet coefficients extracted revealed symmetrical yet site-specific contour variations, particularly along the rostral, dorsal, and posterior margins, with the fourth-level wavelet explaining 98% of the cumulative accuracy and being selected for contour analysis. Permutational analysis of multivariate dispersion (PERMDISP) (F = 6.11, p = 0.002) and permutational multivariate analysis of variance (PERMANOVA) (F = 8.42, R2 = 0.179, p …
Toxicokinetics And Multibiomarker Assessment Of Coexposure To Sulfamethoxazole And Titanium Dioxide Nanoparticles In Cyprinus Carpio, Nazish Iftikhar, Rabeea Zafar, Imran Hashmi, Asma Jamil, Christopher Joseph Martyniuk, Munib Ahmed Shafique
Toxicokinetics And Multibiomarker Assessment Of Coexposure To Sulfamethoxazole And Titanium Dioxide Nanoparticles In Cyprinus Carpio, Nazish Iftikhar, Rabeea Zafar, Imran Hashmi, Asma Jamil, Christopher Joseph Martyniuk, Munib Ahmed Shafique
Turkish Journal of Zoology
The combined effects of pharmaceuticals and nanoparticles (NPs) on aquatic organisms remain insufficiently characterized. The present study examined toxicokinetics and multibiomarker responses of Cyprinus carpio (common carp) following exposure to sulfamethoxazole (SMX) and titanium dioxide (TiO₂) NPs. Juvenile fish were treated with SMX (25, 50, and 100 μg/L) alone and in combination with 1.5 mg/L TiO₂ NPs (96 h). TiO₂ NPs had a significant effect on the bioaccumulation of SMX in muscle tissues, with SMX reaching peak concentrations of 2286.54 ng/g in the 100 μg/L SMX + 1.5 mg/L TiO₂ NPs group after 72 h, compared to 1477.2 ng/g with …
Nonmarine Ostracods Of Northern Cyprus: Diversity, Ecology, And Global Island Comparisons, Ahmet Özdi̇lek, Okan Külköylüoğlu
Nonmarine Ostracods Of Northern Cyprus: Diversity, Ecology, And Global Island Comparisons, Ahmet Özdi̇lek, Okan Külköylüoğlu
Turkish Journal of Zoology
There is a notable paucity of detailed information regarding the distribution and ecological characteristics of nonmarine Ostracoda in Northern Cyprus. Furthermore, a comprehensive assessment of their distribution across islands in the Northern and Southern Hemispheres is incomplete. To advance our understanding of ostracod diversity, distribution, and ecological preferences, a total of 79 aquatic sites in Northern Cyprus were randomly sampled between 18 May and 12 August 2022. A total of 64 ostracod taxa were identified, comprising 28 living species and 36 subfossils, with 18 species representing new records for the island. Additionally, five ostracod species were reported for the first …
Dietary Stability Of The Eurasian Beaver Revealed By Hair Stable Isotopes, Linas Balčiauskas, Rasa Vaitkevičiūtė Koklevičienė, Andrius Garbaras, Inga Garbarienė, Laima Balčiauskienė
Dietary Stability Of The Eurasian Beaver Revealed By Hair Stable Isotopes, Linas Balčiauskas, Rasa Vaitkevičiūtė Koklevičienė, Andrius Garbaras, Inga Garbarienė, Laima Balčiauskienė
Turkish Journal of Zoology
The Eurasian beaver (Castor fiber) is a keystone ecosystem engineer whose expanding populations increasingly occupy agricultural landscapes. Hair stable isotope analysis was applied to reconstruct assimilated diet in 56 legally hunted beavers in Lithuania in 2024–2025. Stable carbon isotope values were tightly clustered (–25.53 ± 0.10‰ SE), while those for nitrogen showed greater variability (5.38 ± 0.20‰ SE), indicating limited interindividual dietary differentiation. Generalized linear models revealed no significant effects of sex, year, or month, and age-related differences were limited to the youngest individuals. Comparison with published Polish data showed no significant differences in mean isotope values. Overall, the results …
From Introduction To Biomass Dominance: The Invasive Fish Striped Piggy (Pomadasys Stridens) Reshaping Demersal Assemblages In The Eastern Mediterranean, Mehmet Cengi̇z Deval
From Introduction To Biomass Dominance: The Invasive Fish Striped Piggy (Pomadasys Stridens) Reshaping Demersal Assemblages In The Eastern Mediterranean, Mehmet Cengi̇z Deval
Turkish Journal of Zoology
Rapid increases in the abundance and biomass of nonindigenous species have the potential to profoundly reshape demersal fish assemblages in the Eastern Mediterranean Sea, yet quantitative evidence from long-term standardized surveys remains scarce. In the present study, temporal changes in biomass dynamics and community structure were assessed using fishery-independent trawl surveys conducted on the continental shelf of Antalya Bay (GSA 24) during two periods a decade apart (2009–2010 and 2020–2021), with particular focus on the Lessepsian striped piggy Pomadasys stridens. Based on the second survey, in which both daytime and nocturnal sampling were conducted, the biomass index (BI) differed significantly …
Comparative Cytogenetics Of Four Phelsuma Species: Insights Into Chromosome Evolution In Malagasy Gekkonidae, Marcello Mezzasalma, Gaetano Odierna, Fabio Maria Guarino, Elvira Brunelli
Comparative Cytogenetics Of Four Phelsuma Species: Insights Into Chromosome Evolution In Malagasy Gekkonidae, Marcello Mezzasalma, Gaetano Odierna, Fabio Maria Guarino, Elvira Brunelli
Turkish Journal of Zoology
Karyotype diversification and chromosome mutations (or macromutations) such as inversions, fusions, and fissions represent understudied factors of biological evolution. We present in this study one of the first experimental cytogenetic analyses on the Malagasy day geckos of the genus Phelsuma. A molecular analysis was performed using a trait of the mitochondrial 12S and a comparative chromosome study with traditional Giemsa coloration, Ag-NOR staining and sequential C-banding (C-banding + Giemsa + fluorochromes) on nine individuals of Phelsuma from different localities. The molecular analysis allowed unambiguous identification of three species (P. lineata, P. laticauda, and P. standingi), while two additional samples likely …
Patterns And Drivers Of Cladocera Community Structure In The Black Sea, Elena Bisinicu, Luminita Lazar
Patterns And Drivers Of Cladocera Community Structure In The Black Sea, Elena Bisinicu, Luminita Lazar
Turkish Journal of Zoology
Cladoceran community dynamics were examined in the Romanian sector of the Black Sea during the warm seasons of 2013– 2020, using Marine Reporting Units (MRUs) to evaluate spatial heterogeneity across transitional, coastal, and marine waters. Analyses of density, biomass, mean individual biomass (MIB), and species composition revealed interannual fluctuations superimposed on strong nearshore–offshore gradients, with higher values in transitional and coastal MRUs. The assemblage was consistently dominated by Pleopis polyphemoides and Penilia avirostris, which together accounted for most of the total abundance and biomass. Multivariate analysis identified significant differences in taxonomic composition across MRUs and years, while correlation analyses highlighted …
Endemism Patterns Of Leaf Beetles (Coleoptera: Chrysomelidae) In Türkiye, İsmai̇l Şen, Ali̇ Gök
Endemism Patterns Of Leaf Beetles (Coleoptera: Chrysomelidae) In Türkiye, İsmai̇l Şen, Ali̇ Gök
Turkish Journal of Zoology
In this study, the distribution of endemic leaf beetles in Türkiye was analyzed holistically at the provincial scale using species richness (ENR), corrected weighted endemism (CWE), and range-restricted endemism (RRE) indices. A total of 95 endemic taxa were found in Türkiye and these taxa exhibited significant spatial heterogeneity in terms of richness and extent of distribution. The Western and Central Taurus Mountains and the Eastern Black Sea Region were found to be the main centers of endemism, with high densities of narrowly distributed and geographically restricted species. These patterns clearly demonstrate that key biogeographic factors, such as steep elevation gradients, …
Dynamics Of Ant Activity Under Extreme Climatic Changes In 2024: Effects Of Temperature And Humidity On Formica Rufa And Lasius Fuliginosus Behavior, Stanislav Stukalyuk, Mykola Kozyr, Vira Balabukh
Dynamics Of Ant Activity Under Extreme Climatic Changes In 2024: Effects Of Temperature And Humidity On Formica Rufa And Lasius Fuliginosus Behavior, Stanislav Stukalyuk, Mykola Kozyr, Vira Balabukh
Turkish Journal of Zoology
Global warming and extreme heatwaves, which can alter species distribution and ecosystem dynamics, have profound effects on forest ants. This study investigated the impact of summer and autumn 2024 heatwaves on the activity, prey transport, and nest-building of Formica rufa Linnaeus, 1761 and Lasius fuliginosus (Latreille, 1798) in deciduous forests of Kyiv, Ukraine. Fieldwork was conducted from June to September 2024 in Holosiyivo Forest and the Feofaniya tract. Ant colonies were assigned to experimental plots, where logs were placed along foraging trails, or to control plots with unmanipulated ground-floor trails. The study included 10 F. rufa anthills for activity monitoring …
The Effect Of Spatial Scale Of Habitat On Abundance Of Roe Deer (Capreolus Pygargus) And Water Deer (Hydropotes Inermis Argyropus) During Summer In South Korea, Naeyoung Kim, Hyejin Kim, Hyoun-Gi Cha, Hyun-Su Hwang
The Effect Of Spatial Scale Of Habitat On Abundance Of Roe Deer (Capreolus Pygargus) And Water Deer (Hydropotes Inermis Argyropus) During Summer In South Korea, Naeyoung Kim, Hyejin Kim, Hyoun-Gi Cha, Hyun-Su Hwang
Turkish Journal of Zoology
Understanding species-specific habitat preferences provides essential ecological information about interactions among habitat components. In South Korea, roe deer (Capreolus pygargus) and water deer (Hydropotes inermis argyropus) are the dominant large herbivorous mammals of the family Cervidae. The increasing populations of these species have led to ecological and economic challenges. Therefore, we investigated the effects of spatial scale characteristics on the habitat preferences of roe deer and water deer. From June to August each year between 2021 and 2023, we calculated the relative abundance index (RAI) using camera-trap data and analyzed patch characteristics in the study area using remote sensing techniques, …
The Ecotoxicological Impact Of Polystyrene On Lissachatina Fulica: A Study Of Growth, Pedal Mucus Histological Changes, And Protein Mucus Analysis, Atin Supiyani, Wasmen Manalu, Lina Noviyanti Sutardi, Mawar Subangkit, Andriyanto Andriyanto
The Ecotoxicological Impact Of Polystyrene On Lissachatina Fulica: A Study Of Growth, Pedal Mucus Histological Changes, And Protein Mucus Analysis, Atin Supiyani, Wasmen Manalu, Lina Noviyanti Sutardi, Mawar Subangkit, Andriyanto Andriyanto
Turkish Journal of Zoology
Lissachatina fulica mucin can be used as a nutraceutical agent depending on the quality of their feed. Polystyrene (PS) waste harms soil and plants consumed by snails, potentially affecting the quality of mucin production. This study investigated the impact of PS on growth and mucus-producing cell characteristics as well as the network pharmacology of mucin protein components. Fifty 5–6 cm L. fulica snails (20–24 g) were fed organic waste (OW) and organic waste with PS (OWPS). After 28 days of ad libitum access to food, the snails’ mucus, meat, and shells were collected and weighed. Tissue samples from the anterior …
Nonnative Crayfish In Türkiye: Presence Records, Invasion Pathways, And Ecological Risks, Muzaffer Mustafa Harlioğlu
Nonnative Crayfish In Türkiye: Presence Records, Invasion Pathways, And Ecological Risks, Muzaffer Mustafa Harlioğlu
Turkish Journal of Zoology
The globalization of trade, aquaculture, and the ornamental pet industry has accelerated the transboundary movement of nonnative crayfish species, with significant ecological consequences. Türkiye, a biodiversity-rich country bridging Europe and Asia, has increasingly become a point of concern due to the rising presence of alien crayfish taxa introduced primarily via the aquarium trade and scientific research. This study investigates the presence records of nonnative crayfish species in Türkiye, identifies their likely introduction pathways, and outlines potential future outspread routes across the major freshwater basins of the country. Species such as Procambarus clarkii, Cherax quadricarinatus, C. albertisii, and Cambarellus patzcuarensis have …
Stage-Specific Growth Characteristics Of The Calanoid Copepod Invader Sinodiaptomus Sarsi, Leonid Svetlichny, Kami̇l Mert Eryalçin, Melek İşi̇ni̇bi̇li̇r Okyar
Stage-Specific Growth Characteristics Of The Calanoid Copepod Invader Sinodiaptomus Sarsi, Leonid Svetlichny, Kami̇l Mert Eryalçin, Melek İşi̇ni̇bi̇li̇r Okyar
Turkish Journal of Zoology
The population dynamics of the Asian invasive copepod Sinodiaptomus sarsi were studied for four years after its introduction into an artificial pond in Kyiv (Ukraine) in 2020. The growth and development parameters of this species were measured under laboratory conditions. From its first appearance in spring 2020, the abundance of copepodite stages and adults increased from 3.5–5.2 individuals (ind.) m–3 to 1057.8 ind. m–3 in June 2024, suggesting the successful establishment of S. sarsi populations in this region. A characteristic feature of S. sarsi development in ponds is a male-biased sex ratio in the later copepodite stages. The sex ratio …
Morphometric And Reproductive Divergence Of Deep-Water Shrimps Plesionika Martia (A. Milne-Edwards, 1883) And P. Heterocarpus (A. Costa, 1871) Along A Depth Gradient In The Eastern Aegean Sea, Murat Özbek, Cengi̇z Koçak, Zafer Tosunoğlu
Morphometric And Reproductive Divergence Of Deep-Water Shrimps Plesionika Martia (A. Milne-Edwards, 1883) And P. Heterocarpus (A. Costa, 1871) Along A Depth Gradient In The Eastern Aegean Sea, Murat Özbek, Cengi̇z Koçak, Zafer Tosunoğlu
Turkish Journal of Zoology
This study provides a comparative analysis of two deep-water pandalid shrimp species, Plesionika martia and P. heterocarpus, based on monthly samples collected over one year in the Eastern Aegean Sea. Specimens were obtained from species-specific depth zones (550 m for P. martia and 350 m for P. heterocarpus) to examine morphometric traits, sexual dimorphism, and reproductive patterns. A total of 4419 individuals were analyzed. Females were significantly larger and more abundant than males (K–S test, p < 0.05), indicating pronounced sexual dimorphism. Length–weight relationships revealed negative allometric growth in both species, confirmed by t-tests (p < 0.05). Reproductive activity differed markedly: P. martia showed a short and distinct spawning period peaking in late autumn, whereas P. heterocarpus displayed a prolonged, bimodal cycle with peaks in spring and summer. The gonadosomatic index (GSI) and the proportion of ovigerous females varied significantly by season and species. A strong positive correlation between carapace length and gonad weight was found, with a more linear relationship in P. martia and greater variability in P. heterocarpus. Size at first maturity (L₅₀) was estimated at 22.3 mm CL for P. heterocarpus but could not be reliably determined for P. martia due to limited small size data, likely reflecting ontogenetic depth segregation. The consistent bathymetric separation between these species—also reported in the Western Mediterranean—suggests ecological niche differentiation. Species-specific management measures, including depth-based fishing restrictions and temporal closures during reproductive peaks, are recommended to support the sustainable exploitation of deep sea shrimp stocks in the region.
Frequencies And Roles Of Plants In The Diet Of Three Mesocarnivores (Canis Lupaster, Genetta Genetta, And Herpestes Ichneumon): Implications For Forest Regeneration In A North African Hot Spot (Algeria), Messaoud Bensidhoum, Abdelkrim Limane, Larbi Khifer, Ania Ben Ammar, Lylia Amrouche
Frequencies And Roles Of Plants In The Diet Of Three Mesocarnivores (Canis Lupaster, Genetta Genetta, And Herpestes Ichneumon): Implications For Forest Regeneration In A North African Hot Spot (Algeria), Messaoud Bensidhoum, Abdelkrim Limane, Larbi Khifer, Ania Ben Ammar, Lylia Amrouche
Turkish Journal of Zoology
The Djurdjura National Park (PND, Algeria) is part of one of the world’s 36 biodiversity hot spots, recognised by the United Nations as a national biosphere reserve. It contains the Darna primary forest, a key habitat for several mesocarnivore mammals, including the golden wolf (Canis lupaster), the common genet (Genetta genetta) and the ichneumon mongoose (Herpestes ichneumon). Although their diets are primarily based on animal prey, these carnivores exhibit both qualitative and quantitative reliance on plants, a pattern that merits thorough documentation. We analysed 30 scats per species per month over four years (1440 scats per species). More than 35% …
Species Identification Using Otolith Morphometry Of Four Gurnards (Family: Triglidae) From Edremit Bay (Aegean Sea), Ahmet Mert Şenbahar, Di̇lek İlhan, Aydin Ünlüoğlu, Sencer Akalin
Species Identification Using Otolith Morphometry Of Four Gurnards (Family: Triglidae) From Edremit Bay (Aegean Sea), Ahmet Mert Şenbahar, Di̇lek İlhan, Aydin Ünlüoğlu, Sencer Akalin
Turkish Journal of Zoology
Shape and size analyses of otoliths are widely considered appropriate tools for distinguishing between fish species and for assessing populations and stocks. The present study aims to distinguish four gurnard species collected from Edremit Bay (Aegean Sea) based on variations in their otolith shape morphology. A total of 60 specimens of Eutrigla gurnardus, 64 of Chelidonichthys lastoviza, 60 of Chelidonichthys lucerna, and 60 of Lepidotrigla cavillone were analyzed. No significant intraspecific differences were noted in the morphology of the left and right otoliths, and so only the left sagittal otoliths were subjected to further analysis. Otolith shape was quantified using …
Latest Sightings Of The Striped Hyena In North Africa: Major Threats And Conservation Actions, Abderrazak El Alami, Abderrazzak Fattah, Ilyas El Alami, Ziad El Alami
Latest Sightings Of The Striped Hyena In North Africa: Major Threats And Conservation Actions, Abderrazak El Alami, Abderrazzak Fattah, Ilyas El Alami, Ziad El Alami
Turkish Journal of Zoology
The striped hyena (Hyaena hyaena) is widely distributed across the northern half of Africa, the Middle East, the Arabian Peninsula, and parts of Asia. However, numerous studies indicate that this carnivore is in decline, and it is currently classified as near threatened on the IUCN Red List of threatened species. In North Africa, the Hyaena hyaena barbara subspecies has been extirpated from many areas. This article summarizes data collected from observations of the striped hyena in North Africa between 2004 and 2024. Among the 418 striped hyenas recorded in North Africa between 2004 and 2024, 18.4% (n = 77) were …
Exploring Molecular And Morphological Diversity Of Ostracoda: A Combined Approach Based On Coi Sequences And Morphological Characters, Serdar Di̇nç, Serap Mutun, Okan Külköylüoğlu
Exploring Molecular And Morphological Diversity Of Ostracoda: A Combined Approach Based On Coi Sequences And Morphological Characters, Serdar Di̇nç, Serap Mutun, Okan Külköylüoğlu
Turkish Journal of Zoology
Ostracods are diminutive aquatic invertebrates with a broad geographical distribution across a diverse range of aquatic habitats, including lentic and lotic freshwater environments as well as marine waters. Due to their sensitivity to environmental changes, ostracods are valuable tools in biodiversity monitoring, providing a link to past, present, and future ecological conditions. Despite the significance of classical taxonomic studies in species identification, molecular approaches remain underutilized in ostracod research, representing an area of potential growth for advancing our understanding of this diverse group. Thus, molecular studies in ostracods have the potential to greatly enhance our understanding of morphology, ecological variation …
Spatial And Temporal Variability Of Mayfly Communities (Insecta: Ephemeroptera) In Mountainous And Semimountainous Rivers Of The Western Aegean Basin, Biljana Rimcheska, Yanka Vidinova
Spatial And Temporal Variability Of Mayfly Communities (Insecta: Ephemeroptera) In Mountainous And Semimountainous Rivers Of The Western Aegean Basin, Biljana Rimcheska, Yanka Vidinova
Turkish Journal of Zoology
Mayflies are among the most abundant benthic invertebrates inhabiting natural lotic freshwater systems. Their assemblages vary with environmental, geographical, and hydrological conditions along altitudinal gradients and under different types of watershed disturbance. The main objective of this study was to analyze the composition and β-diversity of mayflies across three river watersheds and to assess how these assemblages differ among them. We collected biological and environmental data from 38 sampling sites distributed across the three river watersheds. We hypothesized that mayfly assemblages would vary with environmental gradients on both spatial and temporal scales; specifically, we expected pristine streams to exhibit higher …
Towards The Assessment Of E-Flows: A Fish-Based Approach For The Tiber River Basin (Central Italy), Antonella Carosi, Francesca Lorenzoni, Fatemeh Zarei, Rachele Brustenga, Lucio Di Matteo, Daniela Valigi, Corrado Cencetti, Carlo Cardellini, Stefano Casadei, David Cappelletti, Massimo Lorenzoni
Towards The Assessment Of E-Flows: A Fish-Based Approach For The Tiber River Basin (Central Italy), Antonella Carosi, Francesca Lorenzoni, Fatemeh Zarei, Rachele Brustenga, Lucio Di Matteo, Daniela Valigi, Corrado Cencetti, Carlo Cardellini, Stefano Casadei, David Cappelletti, Massimo Lorenzoni
Turkish Journal of Zoology
Estimating ecological flows (EFs) in rivers is crucial for meeting the Water Framework Directive (WFD) 2000/60/EC goals. To develop an EF model, it is essential to use biological indicators to reliably record the impacts of human-induced alterations on aquatic ecosystems. The adaptability of fish to annual flow variability makes them a significant biological quality element (BQE). Consequently, using fish as bioindicators is a powerful tool for assessing the impact of changes in the hydrological regime on the natural communities within a river system. The new index of the ecological status of fish communities (NISECI) is a methodology developed in Italy …
Chlorella Vulgaris Measurements Using Full-Spectrum Goniometer For Optically Complex Inland Water Monitoring, Pinar Gürbüzer, Uğur Murat Leloğlu
Chlorella Vulgaris Measurements Using Full-Spectrum Goniometer For Optically Complex Inland Water Monitoring, Pinar Gürbüzer, Uğur Murat Leloğlu
Turkish Journal of Zoology
Rising environmental stressors, including climate change, nutrient loading, pollution, and anthropogenic impacts, have made the continuous monitoring of lake water quality increasingly essential. While in situ methods offer high precision, satellite-based remote sensing is essential for capturing large-scale, long-term changes and accessing remote or extreme environments. To complement these approaches, we developed a cost-effective in situ optical measurement system specifically designed for optically complex inland waters. T he instrument enables detailed optical characterization across scattering angles from 0° to 160° and wavelengths between 423 and 728 nm, covering both visible and near-infrared regions. Initial validation was performed using monocultures of …
Zonation-Dependent Distribution Of Microplastic Occurrence In Patella Caerulea From Mersin Coast, Türkiye, Ezgi̇ Deği̇rmenci̇, Nuray Çi̇ftçi̇, Sedat Gündoğdu, Deni̇z Ayas
Zonation-Dependent Distribution Of Microplastic Occurrence In Patella Caerulea From Mersin Coast, Türkiye, Ezgi̇ Deği̇rmenci̇, Nuray Çi̇ftçi̇, Sedat Gündoğdu, Deni̇z Ayas
Turkish Journal of Zoology
Increasing plastic pollution has become a critical environmental issue, leading to challenges in management. Specifically, microplastics (MPs) are of particular concern because they can persist in aquatic ecosystems and adversely affect marine organisms. The objective of this study was to assess the occurrence of MPs in the soft tissues of Patella caerulea (Linnaeus, 1758) collected from the Mersin Viranşehir coastal area. As no specimens were found in the supralittoral zone, the decision was taken to conduct sampling only in the mediolittoral and infralittoral zones. The total sampling area was 24 m2 divided into three 4-m2 plots in each zone. A …
Blinking Without Eyelids: First Video-Documented Evidence Of A Blink-Like Reflex In Ophisops Elegans (Reptilia: Lacertidae), Turan Meri̇ç Çelebi̇, Yusuf Çeli̇kaği, Tuana Kinay, Arda Cem Kuyucu, Muammer Kurnaz, Mehmet Kürşat Şahi̇n
Blinking Without Eyelids: First Video-Documented Evidence Of A Blink-Like Reflex In Ophisops Elegans (Reptilia: Lacertidae), Turan Meri̇ç Çelebi̇, Yusuf Çeli̇kaği, Tuana Kinay, Arda Cem Kuyucu, Muammer Kurnaz, Mehmet Kürşat Şahi̇n
Turkish Journal of Zoology
Eyelids play a crucial role in protecting the eyes of vertebrates; however, certain reptile species, such as Ophisops elegans, completely lack movable eyelids. In this study, we present the first video-documented evidence of a blink-like reflex in O. elegans, captured through endoscopic field observations and corroborated by laboratory video analysis. The observed movement consisted of a brief convex deformation of the ocular surface, lasting approximately 0.3 s and resembling a blink despite the presence of a fixed transparent brille. This behavior was observed once in the field and twice under controlled laboratory conditions. We propose that O. elegans may employ …
Growth Patterns And The Shift From Predominantly Female To Balanced Sex Ratios In Carassius Gibelio (Bloch, 1782): A Comparative Study Of Lotic And Lentic Populations In Serbia, Tamara Mitić, Jelena Čanak Atlagić, Ana Marić, Jelena Stanković Ristić, Nikola Marinković, Momir Paunović, Predrag Simonović
Growth Patterns And The Shift From Predominantly Female To Balanced Sex Ratios In Carassius Gibelio (Bloch, 1782): A Comparative Study Of Lotic And Lentic Populations In Serbia, Tamara Mitić, Jelena Čanak Atlagić, Ana Marić, Jelena Stanković Ristić, Nikola Marinković, Momir Paunović, Predrag Simonović
Turkish Journal of Zoology
Since its introduction into Serbian watercourses, the invasive Carassius gibelio (Bloch, 1782) (Prussian carp) has spread rapidly. This paper provides an up-to-date overview of the sex ratio, age structure, and growth parameters in Serbian populations of this fish and describes how growth varies in two contrasting ecosystems: lotic and lentic. A total of 133 individuals were sampled. The individuals from lentic habitats were longer on average, with no significant differences in average weight or age between the two ecosystem types. There was a difference in the sex ratio between the ecosystems, as indicated by a higher proportion of males in …
Habitat Diversity Or Altitudinal Gradient? Which Factor Better Explains Ground Beetle (Coleoptera: Carabidae) Biodiversity? A Case Study From Davraz Mountain (Isparta, Türkiye), Ebru Ceren Fi̇dan, Ali̇ Gök
Habitat Diversity Or Altitudinal Gradient? Which Factor Better Explains Ground Beetle (Coleoptera: Carabidae) Biodiversity? A Case Study From Davraz Mountain (Isparta, Türkiye), Ebru Ceren Fi̇dan, Ali̇ Gök
Turkish Journal of Zoology
Ground beetle (Carabidae) species diversity and spatial distribution were surveyed across five habitat types along an elevational gradient on Davraz Mountain, a biogeographical transition area in southwestern Türkiye. The analyses showed that habitat heterogeneity—particularly soil moisture and texture—exerts a stronger influence on carabid diversity than elevation. Sørensen’s and Jaccard similarity indices showed strong faunal overlap between some sampling areas, while multivariate principal components and canonical correspondence analyses verified distinct environmental gradients influencing community structure. Diversity indices indicated varying levels of species richness and evenness across sampling areas. The data highlight the importance of fine-scaled habitat features in driving ground beetle …
Dna Metabarcoding Approach To The Determination Of The Diet Spectrum Of The Common Sunbleak Leucaspius Delineatus (Heckel, 1843), Elena V. Dzyuba, Yurij S. Bukin, Bakhtiar E. Bogdanov, Yulia P. Sapozhnikova, Natalia N. Denikina
Dna Metabarcoding Approach To The Determination Of The Diet Spectrum Of The Common Sunbleak Leucaspius Delineatus (Heckel, 1843), Elena V. Dzyuba, Yurij S. Bukin, Bakhtiar E. Bogdanov, Yulia P. Sapozhnikova, Natalia N. Denikina
Turkish Journal of Zoology
The common sunbleak (Leucaspius delineatus) is an invasive fish found in Siberian water bodies, the trophic interactions and impact on local ecosystems of which remain poorly understood. Traditional diet analyses are limited by the mechanical damage to the prey. For the present study, therefore, we employed DNA metabarcoding of the cytochrome c oxidase I (cox1) gene to analyze the digestive tract contents of the common sunbleak obtained from Irkutsk Reservoir. Our analysis revealed 53 operational taxonomic units (OTUs), with sequences of amphibiotic insects (58.66%) and fish (34.10%) being the most prevalent. A significant proportion of the fish DNA, including sequences …
Morphological Variability And Systematics Of Ponto-Caspian Cladocerans Of The Genus Cercopagis Sars, 1897 (Branchiopoda: Onychopoda: Cercopagidae), Larisa F. Litvinchuk, Spartak N. Litvinchuk
Morphological Variability And Systematics Of Ponto-Caspian Cladocerans Of The Genus Cercopagis Sars, 1897 (Branchiopoda: Onychopoda: Cercopagidae), Larisa F. Litvinchuk, Spartak N. Litvinchuk
Turkish Journal of Zoology
In recent decades, significant changes have occurred in the composition of zooplankton, especially in the Ponto-Caspian Basin. An important component of zooplankton in this region is cladocerans of the genus Cercopagis. However, the introduction of invasive species means that many species of this genus have probably become extinct. Because their disappearance molecular study of these organisms is no longer possible. Therefore, a comparative analysis of morphological variability has become more important. We studied the morphological variability of all 12 currently known species of the genus. Samples from the Caspian, Azov, Black, and Baltic Seas were analyzed. The number of species …