SCIDAR Collection:https://scidar.kg.ac.rs/handle/123456789/82142024-03-29T10:29:26Z2024-03-29T10:29:26ZPreliminary modification of the Eshippo Crayfish modelÐuretanović, SimonaVeličković, TijanaMilošković, AleksandraRadojković, NatašaJakovljević, MarijaMaguire, IvanaSimić, Vladicahttps://scidar.kg.ac.rs/handle/123456789/202912024-03-09T03:01:41Z2021-01-01T00:00:00ZTitle: Preliminary modification of the Eshippo Crayfish model
Authors: Ðuretanović, Simona; Veličković, Tijana; Milošković, Aleksandra; Radojković, Nataša; Jakovljević, Marija; Maguire, Ivana; Simić, Vladica
Abstract: The extinction of species and the decline of biodiversity are the most severe global consequences of environmental threats. The decline of biodiversity is far greater in freshwater ecosystems than in the most threatened terrestrial ecosystems, and the most vulnerable are invertebrates, such as freshwater crayfish. Even one-third of freshwater crayfish worldwide are at risk of extinction. Natural subpopulations of the noble crayfish have been declining by 50-70%, and it is classified as a “vulnerable species” in the IUCN Red List of Threatened Species, with a decreasing trend of populations and subpopulations and decreasing distribution areas. We used our published morphometric, phylogenetic, and population genetic data of the noble crayfish populations from aquatic ecosystems of Serbia, Slovenia, and Albania in order to upgrade the existing ESHIPPO crayfish model, and in this way to contribute to conservation plans and management strategies for protection of this threatened species. The main objectives of this study were: 1. to modify the ESHIPPO crayfish model, 2. to assess the risk of extinction, and 3. to determine the priority of protection in the study area. In this study, we upgraded ESHIPPO crayfish model by adding population genetic component of the studied populations. This model is designed to assess the risk of extinction and define the priorities of species conservation in aquatic ecosystems at the local and national levels since frequent differences exist in the assessment of the risk of extinction at the local and global levels. According to the obtained results, the populations from Lake Prespa (68 points), and the Gazivode reservoir (62 points) are defined as populations with a high level of extinction risk at the national level, i.e., the degree of protection priority 1. On the other hand, a moderate risk of extinction, i.e., the degree of protection priority 2, was determined for the populations from the reservoirs Grlište (58 points), Korenica (56 points), and Bloke (56 points), and for the Kočevska River (52 points). We determined six populations as the priority of protection. This kind of model can help identify and preserve the diversity of the species and the integrity of local populations.2021-01-01T00:00:00ZPOTENTIALLY TOXIC ELEMENTS IN LOWLAND GREAT MORAVA RIVER – BIOINDICATION WITH BLEAK (ALBURNUS ALBURNUS)Milošković, AleksandraRadojković, NatašaRadenković, MilenaÐuretanović, SimonaVeličković, TijanaNikolić, MarijanaSimić, Vladicahttps://scidar.kg.ac.rs/handle/123456789/202902024-03-09T03:02:02Z2021-01-01T00:00:00ZTitle: POTENTIALLY TOXIC ELEMENTS IN LOWLAND GREAT MORAVA RIVER – BIOINDICATION WITH BLEAK (ALBURNUS ALBURNUS)
Authors: Milošković, Aleksandra; Radojković, Nataša; Radenković, Milena; Ðuretanović, Simona; Veličković, Tijana; Nikolić, Marijana; Simić, Vladica
Abstract: The utilization of fish bioindicators has become of crucial importance for ecosystem contamination assessment. Bleak (Alburnus alburnus) is a widely distributed epipelagic fish species characterized as very active with fast metabolism which can lead to a high accumulation of pollutants in tissues. Bleak is easy to sample, identify in the field by morphological characteristics, and easy to work within the laboratory. This study deals with the bleak sensitivity in detecting the pressure of the potentially toxic elements (PTEs) in the large lowland Great Morava River. The Al, As, Cd, Co, Cr, Cu, Fe, Hg, Mn, Ni, Pb, Se, Sn, and Zn were estimated in whole body composite (wbc) of bleak. The study was conducted at Great Morava River, near the city of Paraćin in Serbia. The highest concentrations of essential elements Zn and Fe were detected. The most toxic elements As and Hg were below detection limits. The metal pollution index (MPI) was 0.39. In large lowland rivers, point sources of pollution such as municipal wastewaters of smaller settlements usually have only local impact due to high dilution by the main watercourse. Since bleak is a site-specific species, results in this study indicated that this stretch of the Great Morava River is slightly affected by PTEs. None of the elements above the maximum permitted concentrations (MPC) in fish meat for use in the human diet, prescribed by the Official Gazette and European Commission Regulation, were not recorded.2021-01-01T00:00:00ZPRELIMINARY RESULTS REGARDING PHYLOGENY OF THE NOBLE CRAYFISH (DECAPODA, ASTACIDAE, „ASTACUS ASTACUS“) IN SERBIAÐuretanović, SimonaVeličković, TijanaMilošković, AleksandraRadenković, MilenaNikolic, MarijanaMaguire, IvanaSimić, Vladicahttps://scidar.kg.ac.rs/handle/123456789/202892024-03-09T03:00:50Z2021-01-01T00:00:00ZTitle: PRELIMINARY RESULTS REGARDING PHYLOGENY OF THE NOBLE CRAYFISH (DECAPODA, ASTACIDAE, „ASTACUS ASTACUS“) IN SERBIA
Authors: Ðuretanović, Simona; Veličković, Tijana; Milošković, Aleksandra; Radenković, Milena; Nikolic, Marijana; Maguire, Ivana; Simić, Vladica
Abstract: The noble crayfish is one of the three autochthonous species that inhabit the freshwater ecosystems of Serbia, along with stone and Danube crayfish. The noble crayfish has a complex historical and genetic status shaped by geological events, habitat loss, pollution, translocations, and reintroductions of both autochthonous and allochthonous crayfish species. That led to the disruption of the species genetic structure, mixing, and loss of populations across Europe. According to recent data, its populations in the freshwater ecosystems of Serbia are significantly reduced, so it has the status of a „strictly protected species“. The genetic structure of the species must be known for endangered species conservation. Unfortunately, there is lack of such data for the territory of Serbia, which due to its position on the Balkan Peninsula, was an important refuge during the glaciation period. In this paper, the genetic structure of seven crayfish populations in freshwater ecosystems of Serbia was examined. Analyzes were performed on the COI and 16S rRNA genes of mitochondrial DNA. The study results showed a significant diversity of COI and 16S rRNA haplotypes compared to already described haplotypes. Three haplotypes were detected, of which Hap26 is the most common and was detected in five studied populations. Haplotypes Hap47 and Hap49 were detected in one and two populations, respectively. The results obtained in this study, together with previously published morphometric data, represent a good starting point for further genetic and population research, which are the basis for the proposal of conservation measures.2021-01-01T00:00:00ZFreshwater Crayfish of the Western Balkans: Is it Possible to Use them Sustainably or Do they Need Prompt Conservation Actions?Ðuretanović, SimonaRajković, MilkaMaguire, Ivanahttps://scidar.kg.ac.rs/handle/123456789/202882024-03-09T03:01:21Z2023-01-01T00:00:00ZTitle: Freshwater Crayfish of the Western Balkans: Is it Possible to Use them Sustainably or Do they Need Prompt Conservation Actions?
Authors: Ðuretanović, Simona; Rajković, Milka; Maguire, Ivana
Editors: Simić, Vladica; Simić, Snežana; Pešić, Vladimir
Abstract: The extinction of species and biodiversity decline are the most severe global consequences of environmental threats in the Anthropocene era. Freshwater ecosystems are the most endangered and invertebrates residing in them are the most vulnerable, particularly freshwater crayfish. The freshwater crayfish are significant components of biodiversity, are indicators of good water quality, are also known as keystone species in food webs, and have an important ecological role in the proper functioning of a freshwater ecosystem. The Western Balkans freshwater ecosystems are home to four indigenous species, Austropotamobius torrentium, A. pallipes, Astacus astacus, and Pontastacus leptodactylus. Three of them are listed in the IUCN Red List of Threatened Species as Endangered (A. pallipes), Vulnerable (A. astacus), or Data Deficient (A. torrentium), while P. leptodactylus is categorized as “Least Concern,” and it is, along with A. astacus, a species grown in astaciculture. This chapter aims to present an overview of threats and problems that crayfish of the Western Balkans face, with special reference to the sustainability of already threatened populations.2023-01-01T00:00:00Z