In situ management options to improve crucian carp (<i>Carassius carassius</i>, L.) and brown trout (<i>Salmo trutta</i>, L.) population status in Central Europe: A case study from the Czech Republic

Lyach, Roman

doi:10.1002/ece3.9107

Cited by 3 publications

(1 citation statement)

References 58 publications

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“…Carassius carassius does not require highly specific habitat conditions of lentic habitats as long as competition and predation are minimized (Holopainen, Tonn & Paszkowski, 1997; Sayer et al, 2011). This means that a properly planned local recovery action can fulfil its aims (Sayer et al, 2020; Lyach, 2022).…”

Section: Discussionmentioning

confidence: 99%

Invasive gibel carp (Carassius gibelio) outperforms threatened native crucian carp (Carassius carassius) in growth rate and effectiveness of resource use: Field and experimental evidence

Tapkir

Boukal

Kalous

et al. 2022

Aquatic Conservation

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1. Invasive alien species pose a serious threat to biodiversity. They frequently compete with native species for resources, resulting in the decline or extinction of the latter. 2. Native crucian carp (Carassius carassius) faces a severe decline in European waters and has become critically endangered in many European countries. Possible ecological mechanisms of the rapid decline of the crucian carp attributable to resource competition with the invasive Carassius gibelio were identified. A field study was combined with a controlled experiment to compare (i) standard lengthweight relationships and growth patterns in 12 Czech and Swedish ponds in which the species occur alone or in syntopy, and (ii) individual growth and food utilization under the same conditions. 3. The growth increment of C. gibelio was greater than that of C. carassius under the same experimental conditions (mean increase in weight: C. gibelio, 21.7%; C. carassius, 5.2%; increase in standard length: C. gibelio, 6.3%; C. carassius, 2.0%), suggesting that C. gibelio uses food resources more efficiently than C. carassius does. Moreover, larger C. carassius individuals did not grow, whereas growth of C. gibelio individuals was largely independent of standard length. 4. Field data suggested that C. gibelio grew faster and were heavier than C. carassius of the same standard length in four Czech ponds where they occurred together. Individual weight-at-length declined in C. carassius in the presence of C. gibelio, especially in more dense populations, whereas the weight-at-length of C. gibelio remained similar. 5. Taken together, these results imply that C. gibelio has better competitive abilities for food than C. carassius and provide novel support for the long-standing hypothesis that the introduction and spread of C. gibelio causes the decline of C. carassius in European waters.

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Section: Discussionmentioning

confidence: 99%

Invasive gibel carp (Carassius gibelio) outperforms threatened native crucian carp (Carassius carassius) in growth rate and effectiveness of resource use: Field and experimental evidence

Tapkir

Boukal

Kalous

et al. 2022

Aquatic Conservation

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Sampling bias of invasive gibel carp and threatened crucian carp: Implications for conservation

Thomas,

Brabec,

Tapkir

et al. 2023

Global Ecology and Conservation

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The Danube Delta: The Achilles Heel of Danube River–Danube Delta–Black Sea Region Fish Diversity under a Black Sea Impact Scenario Due to Sea Level Rise—A Prospective Review

Bănăduc

Afanasyev

Akeroyd³

et al. 2023

Fishes

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The Danube Delta is one of Earth’s biodiversity hotspots and includes many endemic, rare, and important species of both major conservation and economic value. This unique complex of ecosystems also plays a key role for Danube River and Black Sea fish fauna through its role as a natural safe buffer, shelter, feeding, reproduction, and smooth transitional area for a large number of fish species. Climate change is inducing a progressive sea level rise in the Black Sea, a fact that is expected to impact the delta’s key complex and dynamic habitats, biocoenoses, and associated biota, and last but not least the key taxonomic group, namely, fish. Around one-third of the fish species of this delta will be greatly affected, sometimes negatively, by this climate change scenario, another one-third to a lesser extent, and the final one-third not at all. The ecological positive feedback of fish can stimulate environmental change and is expected to be responsible for changes within Danube Delta ecosystems, and also for the near Danube River and Black Sea diverse matrix of aquatic and semi-aquatic ecosystems. Sea level rise in the Black Sea is considered to have been one of the main stress factors of the Danube Delta fish fauna in the past, and is likely to be the case in the future. In this spatio-temporal dynamic context, for the fish species under threat and risk, in situ-adapted management measures are highly required. The current work brings for the first time such a prospective knowledge about the potential impact on Danube River–Danube Delta–Black Sea coast fish diversity in the potential climate change–sea level rise scenario.

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In situ management options to improve crucian carp (Carassius carassius, L.) and brown trout (Salmo trutta, L.) population status in Central Europe: A case study from the Czech Republic

Cited by 3 publications

References 58 publications

Invasive gibel carp (Carassius gibelio) outperforms threatened native crucian carp (Carassius carassius) in growth rate and effectiveness of resource use: Field and experimental evidence

Invasive gibel carp (Carassius gibelio) outperforms threatened native crucian carp (Carassius carassius) in growth rate and effectiveness of resource use: Field and experimental evidence

Sampling bias of invasive gibel carp and threatened crucian carp: Implications for conservation

The Danube Delta: The Achilles Heel of Danube River–Danube Delta–Black Sea Region Fish Diversity under a Black Sea Impact Scenario Due to Sea Level Rise—A Prospective Review

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