Headwater refuges: Flow protects Austropotamobius crayfish from Faxonius limosus invasion

NeoBiota, Год журнала: 2023, Номер 89, С. 71 - 94

Опубликована: Ноя. 8, 2023

This study explores the geospatial relationship between invasive crayfish species Faxonius limosus and native Austropotamobius bihariensis A. torrentium populations in Eastern Europe, identifying environmental factors which influence invasion. We used distribution modelling based on several climatic, geophysical water quality variables distributional data to predict sectors suitable for each within river network. Thus, we identified potentially connecting population clusters quantified degree of proximity competing species. These were then extensively surveyed with trapping hand searching, doubled by eDNA methods, order assess whether any or plague pathogen Aphanomyces astaci are present. The predictive models exhibited excellent performance successfully distinguished analysed expansion F. streams was found be limited flash-flood potential, resulting a range that is constrained lowland rivers. Field surveys neither nor presence connective sectors. Another interesting finding derived from screening efforts, among most extensive carried out across native, apparently healthy populations, existence latent infection an strain as A-haplogroup. Our results provide realistic insights long-term conservation species, appear naturally protected expansion. Conservation efforts can thus focus other relevant aspects, such ark-sites establishment preventing spread more dangerous virulent strains, even locations without direct contact hosts.

Язык: Английский

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Physiological performance of native and invasive crayfish species in a changing environment: insights from Dynamic Energy Budget models

Conservation Physiology, Год журнала: 2022, Номер 10(1)

Опубликована: Янв. 1, 2022

Abstract Crayfish are keystone species important for maintaining healthy freshwater ecosystems. native to Europe, such as Astacus astacus and Austropotamobius torrentium, facing decline increasingly endangered by changing climate invasions of non-native crayfish, Pacifastacus leniusculus Procambarus virginalis. The success these largely depends on differences in ontogeny between the invaders how changes environment will affect ontogeny. Dynamic Energy Budget (DEB) models can be used investigate because capture dependence metabolism, therefore ontogeny, environmental conditions. We develop DEB all four key elements metabolism affecting interspecific competition. then use predict individual growth reproduction current new conditions that expected arise from change. Although observations suggest P. poses major threat species, our analysis identifies virginalis, spite its smaller size, superior competitor a large margin—at least when considering Our simulations show change is set increase competitive edge virginalis even further. Given prospects dominance, especially it able withstand spread at some crayfish plague strains severely additional research into necessary.

Язык: Английский

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Freshwater Crayfish of the Western Balkans: Is it Possible to Use them Sustainably or Do they Need Prompt Conservation Actions?

Springer eBooks, Год журнала: 2023, Номер unknown, С. 341 - 374

Опубликована: Янв. 1, 2023

Язык: Английский

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The Impacts of Invasive Crayfish and Other Non-Native Species on Native Freshwater Crayfish: A Review

Biology, Год журнала: 2024, Номер 13(8), С. 610 - 610

Опубликована: Авг. 12, 2024

Freshwater crayfish are vital species in ecosystems where they naturally occur, as hold keystone and ecological engineering positions these systems. Non-native common widely spread throughout Earth’s freshwater can have severe impacts on native populations. There has yet to be a comprehensive global review of the non-native crayfish. Two literature searches were conducted using Web Science Google Scholar find articles address four key aims: (1) summarise trends literature; (2) examine mechanisms by which invasive impact species; (3) other species, such fish, (4) identify gaps knowledge research priorities. This highlights that far greater amount addressed effects than species. The focuses types interactions with crayfish: competition, predation, introduction disease, reproductive impacts. Studies addressing indicate predation habitat destruction processes impacting It is evident field-based research, particularly concerning competition between crayfish, limited. Therefore, further situ needed assess validity laboratory results natural setting. Additionally, many cases, certain populations gone unmonitored. For this reason, it recommended additional focus assessing To conclude, profound wide-ranging, often leading population decline or extirpation. Further, also likely highly deleterious populations; however, more required understand scope impact.

Язык: Английский

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Host Resistance and Behavior Determine Invasion Dynamics of a Detrimental Aquatic Disease

Ecology and Evolution, Год журнала: 2024, Номер 14(10)

Опубликована: Окт. 1, 2024

ABSTRACT Understanding the role of variation in host resistance and multitude transmission modes parasites infecting hosts with complex behavioral interactions is essential for control emerging diseases. We used a discrete stage model to study invasion dynamics crayfish plague—an example detrimental disease—into naïve population that displays within‐population environmental infections juvenile classes are safe from contacts adults. In model, infection sources include four age crayfish, contaminated carcasses, free‐dwelling zoospores. Disease occurs via environment threshold density through contacts, cannibalism, scavenging disease‐killed conspecifics. Even if fatal, coexistence parasite can be facilitated by variance survival hiding juveniles. The applied diseases especially crayfish‐like organisms.

Язык: Английский

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Further Insights into Invasion: Field Observations of Behavioural Interactions between an Invasive and Critically Endangered Freshwater Crayfish Using Baited Remote Underwater Video (BRUV)

Biology, Год журнала: 2022, Номер 12(1), С. 18 - 18

Опубликована: Дек. 22, 2022

Competitive behavioural interactions between invasive and native freshwater crayfish are recognised as a key underlying mechanism behind the displacement of natives by invaders. However, in situ investigations into scarce. In Australian systems, Cherax destructor has spread ranges many Euastacus species, including critically endangered dharawalus. Staged contests two species laboratory setting found E. dharawalus to be dominant competitor, however, this yet corroborated situ. Here, we used baited remote underwater video (BRUV) examine intra- inter-specific C. destructor. We sought evaluate patterns dominance differential contest dynamics provide indications competition species. over based on pooled interspecific interaction data size-grouped where was smaller opponent. Alarmingly, when within 10% size difference lost, contrasting with outcomes laboratory-staged study. addition, report that small initiated significantly more than larger conspecifics dharawalus, pattern not observed Further, intraspecific were longer duration indicating willingness continue fighting. Concerningly, these point towards inherent greater aggressiveness relative only hold competitive advantage Therefore, conclude represents substantial threat through interactions. due disparity our findings those produced from contests, recommend use studies determining impacts natives.

Язык: Английский

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None

Taurian Scientific Herald, Год журнала: 2022, Номер 126

Опубликована: Янв. 1, 2022

Таврійський науковий вісник.Серія: Сільськогосподарські науки

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Characteristics of the moulting process of different crayfish species

Taurian Scientific Herald, Год журнала: 2022, Номер 126, С. 230 - 237

Опубликована: Янв. 1, 2022

Язык: Английский

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Selective Breeding Is an Underexplored Route Towards Conservation of the Endangered Noble Crayfish

Aquatic Conservation Marine and Freshwater Ecosystems, Год журнала: 2024, Номер 34(11)

Опубликована: Ноя. 1, 2024

Язык: Английский

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Invasieve rivierkreeften in Vlaanderen: Stand van zaken en aanbevelingen bij vaststelling van nieuwe soorten en populaties

Опубликована: Янв. 1, 2023

In de laatste jaren zien we een toenemend aantal meldingen over niet-inheemse invasieve rivierkreeften in Vlaanderen.De toename geldt niet alleen voor het waarnemingen, maar ook soorten.Hoewel verschillende soorten op Unielijst staan als zorgwekkende, exoten EU, zijn er Vlaanderen tot dusver beperkte initiatieven opgestart om deze te bestrijden of hun verspreiding perken.Dit rapport bundelt beschikbare kennis rivierkreeftenproblematiek, en is eerste aanzet beheer van organismen.In plaats geven overzicht mogelijke impact uitheemse zowel biota fysieke omgeving.Hun trofische verwevenheid leidt rechtstreekse onrechtstreekse groepen macrofyten, amfibieën, vissen invertebraten.Als drager pathogenen kunnen zij ziektes verder verspreiden, belemmeren herintroductie inheemse Europese rivierkreeft.Ook rivierkreeftengedrag bewerkstelligt verdere achteruitgang watersysteem.Graafgedrag oevers zorgt hogere sedimentflux naar waterkolom.Ook wijze voortbewegen foerageergedrag leiden vertroebeling waterkolom.De recht evenredig met densiteit aanwezige populatie rivierkreeften, afhankelijk soort rivierkreeft.Voor elk wordt verspreiding, voornaamste eigenschappen introductiegeschiedenis toegelicht.Ook die zich hier potentieel vestigen worden detail besproken.Dit beschouwde rivierkreeften: Aanwezig VlaanderenTe verwachten Gevlekte Amerikaanse rivierkreeft Gewone Yabby Californische Calicotkreeft Turkse Kentuckyrivierkreeft Gestreepte Roestbruine Rode Geknobbelde Marmerkreeft Een beheerregeling surveillancenetwerk, bijvoorbeeld implementatie eDNAtechnologie, laat toe proactief invasies organismen

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