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Kovacs, Z.

Publications and source records attributed to Kovacs, Z..

4 recordsLinked to original sources

The lost vultures of Romania: reconstructing two centuries of decline from historical records (Gyps fulvus, Aegypius monachus, Neophron percnopterus, Gypaetus barbatus)

Romania represents one of the few European Union member states in which all four Old World vulture species historically maintained breeding populations: the Griffon Vulture (Gyps fulvus), Cinereous Vulture (Aegypius monachus), Egyptian Vulture (Neophron percnopterus) and Bearded Vulture (Gypaetus barbatus). Until ongoing reintroduction efforts, Romania remained among the last EU countries whose former vulture guild had not yet been targeted for active recovery. Despite this exceptional significance in a European conservation context, no comprehensive synthesis of the historical and contemporary distribution of these species in Romania has been undertaken. We conducted an extensive review to gather all available vulture occurrence data and present a database of 1,136 occurrence records spanning 1818-2025. We systematically searched museum collections, historical ornithological literature, modern field surveys and citizen-science platforms. The database documents substantial breeding populations across the Carpathian arc and Dobrogea until the early twentieth century, followed by near-total breeding collapse between the 1920s and 1960s driven by persecution, secondary poisoning and agrarian transformation. In total, 148 confirmed or probable breeding records have been documented for the four species combined, with the most recent confirmed breeding records dating to 1929 (Gyps fulvus and Gypaetus barbatus), 1942 (Aegypius monachus) and 1966 (Neophron percnopterus). Non-breeding occurrences increase markedly after 2010, consistent with dispersal from expanding Balkan source populations. The F[a]g[a]ras and Retezat Mountains emerge as the historically most important breeding strongholds for three of the four species (all except the Egyptian Vulture). This dataset highlights the value of reconstructing historical baselines where functional extinction preceded modern monitoring, and provides an empirical foundation for reassembling a keystone scavenger guild in the Carpathian-Danube region.

zoology↗

Individuality and information content of infrared molecular profiles: insights from a large longitudinal health-profiling study

In this study, we investigate the individuality and information content of infrared molecular profiles derived from blood samples in a large, longitudinal health-profiling cohort and compare them to a standard clinical laboratory panel. Using Fourier-transform infrared spectroscopy, we obtained comprehensive molecular fingerprints from 4,704 self-reported healthy individuals over five visits spanning 1.5 years, alongside routine clinical laboratory measurements. We show that infrared profiles are highly individual-specific and remarkably stable over time, with intra-individual variability significantly lower than inter-individual differences--paralleling the characteristics observed in clinical laboratory data. To quantify and compare the information content of these molecular datasets, we employ individual identification as a proxy for Shannon entropy. In this framework, higher identification accuracy reflects a higher amount of information. Infrared profiles outperform the clinical laboratory panel in identifying individuals at scale, suggesting higher intrinsic information content. Furthermore, combining infrared and clinical laboratory data substantially improves identification performance (the identification of less than 3000 individuals by the clinical laboratory panel is boosted to more than 4000 by incorporating the infrared spectroscopic markers), highlighting the value of integrating complementary data modalities. These findings suggest a practical framework, rooted in information theory, for comparing molecular profiling approaches and emphasize the potential of infrared spectroscopy as a complementary tool in personalized medicine.

biophysics↗

Age-dependent variation of aedeagal morphology in Agabus uliginosus and the status of A. lotti (Coleoptera, Dytiscidae)

The taxonomic status of Agabus lotti within the Agabus uliginosus species group has been a subject of debate due to morphological similarities and lack of molecular data. In this study, we conducted a comprehensive morphological and molecular analysis of specimens from Central Europe, focusing on the Hungarian population. Morphological comparisons of genital structures revealed age-dependent variations, suggesting a gradual transition from A. lotti to A. uliginosus. Molecular analysis of COI sequences further supported this hypothesis, showing minimal genetic differences among most specimens, with only one individual exhibiting distinctiveness. Therefore, A. lotti should be regarded as a junior synonym of A. uliginosus. Our findings also highlight the need for additional multi-marker studies covering a broader geographic range and including both molecular and morphological approaches to elucidate the taxonomic and phylogenetic relationships within this species group. The inclusion of Hungarian samples notably enriched the diversity of haplotypes, emphasizing the importance of expanding sampling efforts in future research.

zoology↗

Finding valuable bioactive components from Jerusalem artichoke (Helianthus tuberosus L.) leaf protein concentrate in a green biorefinery concept

Jerusalem artichoke is widely known for its inulin-enriched tubers. Recently the opportunity has been arisen to involve the whole plant in biorefinery concept due to its high lignocellulose biomass and tuber production. This paper focuses on the repeatedly harvestable green biomass of Jerusalem artichoke. Ultra-High Performance Liquid Chromatography-Electrospray Ionization/Mass Spectrometry (UHPLC-ESI-MS) was applied to identify the phytochemicals in Jerusalem artichoke leaf protein concentrate (JAPC) thermally extracted from green biomass of three clones, i.e., Alba, Fuseau and Kalevala. Amino acid and fatty acid profiles as well as yield of JAPC were also analyzed. The UHPLC-ESI-MS analyses showed that no toxic phytochemicals were identified in JAPC. The results revealed, also, that JAPC is not only essential-amino acids-rich but also contains substantial amounts of polyunsaturated fatty acids (66-68%) such as linolenic and linoleic acids. Linolenic acid represented 39-43% of total lipid content; moreover, the ratio between {omega}-6 and {omega}-3 essential fatty acids in JAPC was [~]0.6: 1. Using UHPLC-ESI-MS, the following hydroxylated methoxyflavones were for the first time identified in JAPC, i.e., dimethoxy-tetrahydroxyflavone, dihydroxy-methoxyflavone, hymenoxin and nevadensin. These compounds are medically important since they are referred to as anti-cancer, anti-inflammatory and antioxidants. Also, liquiritigenin - estrogenic-like compound - was identified in JAPC alongside the following terpenes, i,e., loliolide and dihydroactinidiolide. However, no remarkable differences of phytochemicals, fatty acids and amino acids composition were seen among Jerusalem artichoke clones. The green biomass of tested clones ranged between 5 to 5.6 kg m-2 and JAPC yield varied from 28.6 to 31.2 g DM kg-1 green biomass with total protein content, on average, of 33.3%. According to our knowledge, this paper is the first scientific report highlighting bioactive substances in JAPC such as PUFA phytochemicals. These results clearly prove that JAPC is a valuable product which can direct towards human and animal nutrition as well as it can serve as basic material for different industrial purposes.

plant biology↗