Grey Partridge

14,000,000 Leading Edge Experts on the ideXlab platform

Scan Science and Technology

Contact Leading Edge Experts & Companies

Scan Science and Technology

Contact Leading Edge Experts & Companies

The Experts below are selected from a list of 777 Experts worldwide ranked by ideXlab platform

Josef Bryja - One of the best experts on this subject based on the ideXlab platform.

Tereza Kralova - One of the best experts on this subject based on the ideXlab platform.

Elisabeth Bro - One of the best experts on this subject based on the ideXlab platform.

  • quantifying genetic distance between wild and captive strains of the Grey Partridge perdix perdix in france conservation implications
    Biodiversity and Conservation, 2020
    Co-Authors: Nicolas Bech, Claude Novoa, Jérôme Boissier, Jeanfrancois Allienne, Elisabeth Bro
    Abstract:

    The Grey Partridge Perdix perdix is an important gamebird in Europe. Its numbers have decreased dramatically during the XXth century and releases are commonly undertaken for the conservation of the populations and/or hunting purposes in Western Europe. However, this practice that generally involves birds from commercial farms raises several concerns, among which a potential hybridization between farmed and wild individuals. Herein, based on microsatellite markers, we characterize the genetic patterns of farmed birds in view of wild birds of the two French subspecies (P. p. armoricana in central-northern France and P. p. hispaniensis in the Pyrenees). Hence, we estimate the risk of genetic introgression between wild and farmed birds. Our results highlight a genetic divergence between both subspecies—in accordance with the known evolutionary history of the Grey Partridge during the Quaternary. In central-northern France, a slight but significant difference in the genetic signature between wild and farmed Partridges is detected. This difference however does not seem prone to alter the gene pool of wild birds if farmed birds are released in the wild and reproduce. On the contrary, in the Pyrenees, the large and significant genetic difference between wild and farmed birds represents a real risk of genetic introgression. This threat should be taken into account in population management.

  • expert judgment based multicriteria decision models to assess the risk of pesticides on reproduction failures of Grey Partridge
    Sar and Qsar in Environmental Research, 2017
    Co-Authors: James Devillers, Elisabeth Bro, Hugo Devillers, Florian Millot
    Abstract:

    A suite of models is proposed for estimating the risk of pesticides against the Grey Partridge (Perdix perdix) and their clutches. Radio-tracked data of females, description and location of the clu...

  • Expert judgment based multicriteria decision models to assess the risk of pesticides on reproduction failures of Grey Partridge
    SAR and QSAR in Environmental Research, 2017
    Co-Authors: James Devillers, Elisabeth Bro, Hugo Devillers, Florian Millot
    Abstract:

    A suite of models is proposed for estimating the risk of pesticides against the Grey Partridge (Perdix perdix) and their clutches. Radio-tracked data of females, description and location of the clutches, and data on the pesticide treatments during the laying periods of the Partridges were used as basic information. Quantitative structure-activity relationship (QSAR) and quantitative structure-property relationship (QSPR) modelling allowed us to characterize the pesticides by their 1-octanol/water partition coefficient (log P), vapour pressure, primary and ultimate biodegradation potential, acute toxicity (LD50) on P. perdix, and endocrine disruption potential. From these physicochemical and toxicological data, the system of integration of risk with interaction of scores (SIRIS) method was used to design scores of risk for pesticides, alone or in mixture. A program, written in R (version 3.1.1), called Simulation of Toxicity in Perdix perdix (SimToxPP), was designed for estimating the risk of substances, considered alone or in mixture, against the Grey Partridge during breeding. The software tool is flexible enough to simulate realistic in situ scenarios. Different examples of applications are shown. The advantages and limitations of the approach are briefly discussed.

  • residues of plant protection products in Grey Partridge eggs in french cereal ecosystems
    Environmental Science and Pollution Research, 2016
    Co-Authors: Elisabeth Bro, James Devillers, Florian Millot, Anouk Decors
    Abstract:

    The contamination of the eggs of farmland birds by currently used plant protection products (PPPs) is poorly documented despite a potential to adversely impact their breeding performance. In this context, 139 eggs of 52 Grey Partridge Perdix perdix clutches, collected on 12 intensively cultivated farmlands in France in 2010-2011, were analysed. Given the great diversity of PPPs applied on agricultural fields, we used exploratory GC/MS-MS and LC/MS-MS screenings measuring ca. 500 compounds. The limit of quantification was 0.01 mg/kg, a statutory reference. A total of 15 different compounds were detected in 24 clutches. Nine of them have been used by farmers to protect crops against fungi (difenoconazole, tebuconazole, cyproconazole, fenpropidin and prochloraz), insects (lambda-cyhalothrin and thiamethoxam/clothianidin) and weeds (bromoxynil and diflufenican). Some old PPPs were also detected (fipronil(+sulfone), HCH(α,β,δ isomers), diphenylamine, heptachlor(+epoxyde), DDT(Σisomers)), as well as PCBs(153, 180). Concentrations ranged between <0.01 and 0.05 mg/kg but reached 0.067 (thiamethoxam/clothianidin), 0.11 (heptachlor + epoxyde) and 0.34 (fenpropidin) mg/kg in some cases. These results testify an actual exposure of females and/or their eggs to PPPs in operational conditions, as well as to organochlorine pollutants or their residues, banned in France since several years if not several decades, that persistently contaminate the environment.Routes of exposure, probability to detect a contamination in the eggs, and effects on egg/embryo characteristics are discussed with regard to the scientific literature.

  • little field evidence of direct acute and short term effects of current pesticides on the Grey Partridge
    Ecotoxicology and Environmental Safety, 2015
    Co-Authors: Florian Millot, Philippe Berny, Anouk Decors, Elisabeth Bro
    Abstract:

    Abstract Direct lethal and sublethal effects of pesticides on farmland birds' populations are recurring questions and largely debated. In this context, we conducted an innovative study combining radiotelemetry, farmer surveys, residue analyses on carcasses and modelling to assess the unintentional effects of pesticides on terrestrial birds. We chose the Grey Partridge Perdix perdix as a case study because this typical bird of European cereal ecosystems is highly exposed to pesticides. In this paper we focused on acute and short-term impacts of pesticides on adult mortality during spring and summer in a one-substance approach (multiple exposure were not studied here) but for a large variety of active substances (a.s.) actually used in cultivated farmland of Northern France. The fate and the location of 529 Partridges were monitored twice a day from early March to late August 2010 and 2011 on 12 sites (14,500 ha). Their daily potential exposure to 183 a.s. was determined by overlapping birds' habitat use and daily pesticide application data. Based on this procedure, we calculated mortality rates within 10 days following a potential exposure for 157 different a.s.. 5 a.s. were associated with a “10-day mortality rate” higher than 10% but a single one (thiacloprid) is reported to be highly toxic to birds. We recorded 261 mortalities among which 94 carcasses were in suitable condition for residue analyses. We detected at least one a.s in 39.4% of carcasses. However, only 2 mortality cases were attributed to poisoning (carbofuran). Furthermore, modelling results showed that these lethal pesticide-related poisonings decreased the population growth rate by less than 1%. In conclusion, we did not point out important direct acute and short-term effects of pesticides currently used by farmers during the breeding season on the Grey Partridge. This is discussed with regards to the complexity of potential effects in operational conditions.

Dana Rymešová - One of the best experts on this subject based on the ideXlab platform.

  • habitat scarcity forms an ecological trap for the Grey Partridge perdix perdix within a central european agricultural landscape
    European Journal of Wildlife Research, 2020
    Co-Authors: Martin Cerný, Dana Rymešová, Miroslav Salek
    Abstract:

    This study examines the habitat selection of Grey Partridge (Perdix perdix) and the effect of habitat type within Partridge home ranges on nest site choice and nest success. Data were collected via radio-tracking in three different areas in the Czech Republic between 2002 and 2010. Compositional analysis was performed on 12 habitat types and uncultivated habitats (such as ruderals, field margins and game refuges) were selected the most during the pre-nesting and nesting periods. Grey Partridges tended to nest in uncultivated habitats and avoided nesting in dominant cereal monocultures. We tested six variables that may determine nest site choice and success. Of these, the study area, proportion of selected habitat and habitat diversity (expressed by the Simpson’s diversity index) significantly affected nest placement in uncultivated habitats. Despite this, the lowest nest failure rate was observed in the predominant cereal habitat. Our findings suggest a possible ecological trap for Partridges throughout our study areas. Due to the lack of uncultivated habitats, Partridges favoured nesting in habitats with a higher predation risk. Conservation managers should increase the proportion of uncultivated areas and promote habitat diversity for Partridge populations in central Europe.

  • switches in covering of eggs in Grey Partridge perdix perdix clutches during laying and incubation
    Folia Zoologica, 2018
    Co-Authors: Martin Cerný, Dana Rymešová, Miroslav Salek
    Abstract:

    Covering of eggs is important antipredator behaviour which is known for several bird species. Generally this behaviour is considered consistent throughout the whole nesting cycle but there can be exceptions in some species. We found two switches in egg covering during nesting in Grey Partridge: the first between two early laying phases, the second between later laying and incubation. The clutch containing only the first egg remained uncovered, larger clutches were covered with dry vegetation in the laying period, but the eggs remained uncovered during incubation breaks. There was a strong consistency of this behaviour among females. From four tested factors, only nesting period significantly affected egg covering. We assume that the first uncovered egg may serve as a bait for predators to test nest-site safety whereas the motion in the course of egg covering during short incubation breaks may increase predator attraction.

  • mate choice for major histocompatibility complex complementarity in a strictly monogamous bird the Grey Partridge perdix perdix
    Frontiers in Zoology, 2017
    Co-Authors: Marta Promerova, Josef Bryja, Oldřich Tomasek, Tereza Kralova, Dana Rymešová
    Abstract:

    Sexual selection has been hypothesised as favouring mate choice resulting in production of viable offspring with genotypes providing high pathogen resistance. Specific pathogen recognition is mediated by genes of the major histocompatibility complex (MHC) encoding proteins fundamental for adaptive immune response in jawed vertebrates. MHC genes may also play a role in odour-based individual recognition and mate choice, aimed at avoiding inbreeding. MHC genes are known to be involved in mate choice in a number of species, with ‘good genes’ (absolute criteria) and ‘complementary genes’ (self-referential criteria) being used to explain MHC-based mating. Here, we focus on the effect of morphological traits and variation and genetic similarity between individuals in MHC class IIB (MHCIIB) exon 2 on mating in a free-living population of a monogamous bird, the Grey Partridge. We found no evidence for absolute mate choice criteria as regards Grey Partridge MHCIIB genotypes, i.e., number and occurrence of amino acid variants, though red chroma of the spot behind eyes was positively associated with male pairing success. On the other hand, mate choice at MHCIIB was based on relative criteria as females preferentially paired with more dissimilar males having a lower number of shared amino acid variants. This observation supports the ‘inbreeding avoidance’ and ‘complementary genes’ hypotheses. Our study provides one of the first pieces of evidence for MHC-based mate choice for genetic complementarity in a strictly monogamous bird. The statistical approach employed can be recommended for testing mating preferences in cases where availability of potential mates (recorded with an appropriate method such as radio-tracking) shows considerable temporal variation. Additional genetic analyses using neutral markers may detect whether MHC-based mate choice for complementarity emerges as a by-product of general inbreeding avoidance in Grey Partridges.

  • Additional file 6: of Mate choice for major histocompatibility complex complementarity in a strictly monogamous bird, the Grey Partridge (Perdix perdix)
    2017
    Co-Authors: Dana Rymešová, Marta Promerova, Josef Bryja, Miroslav Salek, Jana Svobodova, Oldřich Tomasek, Tereza Kralova, Petr Šmilauer, Tomas Albrecht
    Abstract:

    Effect of MHCIIB variants on carotenoid-based ornament redness in Grey Partridge males (n = 41). (DOC 50 kb

  • Additional file 4: of Mate choice for major histocompatibility complex complementarity in a strictly monogamous bird, the Grey Partridge (Perdix perdix)
    2017
    Co-Authors: Dana Rymešová, Marta Promerova, Josef Bryja, Miroslav Salek, Jana Svobodova, Oldřich Tomasek, Tereza Kralova, Petr Šmilauer, Tomas Albrecht
    Abstract:

    The best model selection results explaining the pairing status of Grey Partridge males (n = 41). (DOC 71 kb

Marta Promerova - One of the best experts on this subject based on the ideXlab platform.

Grey Partridge - 15 days free trial to Access Experts & Abstracts