Health status of Pelophylax ridibundus (Amphibia: Ranidae) in a rice paddy ecosystem in Southern Bulgaria and its importance in assessing environmental state: haematological parameters

Zhelev, Zhivko M.; Tsonev, Stefan; Georgieva, Katerina; Arnaudova, D.

doi:10.1007/s11356-017-1109-5

Cited by 24 publications

(12 citation statements)

References 36 publications

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“…For example, corticosterone levels in the blood have been used to investigate potential stress effects associated with habitat fragmentation and temperature increase in common toads (Janin et al 2011;Brischoux et al 2018). Hematological parameters, such as leucocyte count and haemoglobin concentration have also been used for health assessment in the context of pollution effects on amphibians (Zhelev et al 2018). While such parameters provide a clear answer when assessing individual health status, blood sampling requires skills, training and specific ethical authorisations.…”

Section: Body Condition and Fluctuating Asymmetrymentioning

confidence: 99%

Can road stormwater ponds be successfully exploited by the European green frog (Pelophylax sp.)?

Conan

Jumeau²,

Dehaut

et al. 2021

Urban Ecosyst

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Stormwater ponds ("SWPs") are artificial roadside structures, conceived to retain and clean polluted runoff water, before its release to the environment. SWPs were not designed as suitable habitats for wildlife. However, SWPs in Europe are frequently used as breeding sites by amphibians, especially by the European green frog (Pelophylax sp.). Yet, the potential longterm effects of pollutants within SWPs on the populations of this species are unknown. In this study, we investigated the suitability of SWPs as a habitat for European green frogs living in Alsace, NE France, a region with a highly modified landscape that mainly consists of croplands with few natural wetlands remaining. We compared various biological indicators of individual health in 709 green frogs belonging to different life history stages, living in 9 semi-natural ponds (SNPs) and in 25 SWPs. There were no differences between these two pond types for most of the indicators investigated. However, juveniles had a lower body condition (-124%) in SWPs, while adults were 8.3% larger and 41.4% heavier in SWPs. Based on these results, we suggest that SWPs are not a suitable habitat for the development of European green frogs (i.e. juveniles), but may serve as a substitute habitat for adults in a highly modified landscape with few natural wetlands remaining. SWPs may especially act as relay sites, allowing frogs to colonize relict wetlands.

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Section: Body Condition and Fluctuating Asymmetrymentioning

confidence: 99%

Can road stormwater ponds be successfully exploited by the European green frog (Pelophylax sp.)?

Conan

Jumeau²,

Dehaut

et al. 2021

Urban Ecosyst

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“…On the one hand, sublethal effects on reproduction can occur due to direct systemic toxicity. Effects on molecular biomarkers like acetylcholine esterase activities (Hegde et al 2019) and hematological parameters (Zhelev et al 2018) as well as genotoxic and mutagenic effects (Gonçalves et al 2019) may have an impact on the reproductive capacity and thus on amphibian populations. Moreover, resources for the production of eggs may be limited and reproduction reduced due to resources required for pesticide detoxification processes as shown for the woodlouse Porcellio scaber (Jones and Hopkin 1998).…”

Section: Introductionmentioning

confidence: 99%

Pesticide exposure affects reproductive capacity of common toads (Bufo bufo) in a viticultural landscape

2021

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Amphibian populations are declining worldwide at alarming rates. Among the large variety of contributing stressors, chemical pollutants like pesticides have been identified as a major factor for this decline. Besides direct effects on aquatic and terrestrial amphibian stages, sublethal effects like impairments in reproduction can affect a population. Therefore, we investigated the reproductive capacity of common toads (Bufo bufo) in the pesticide-intensive viticultural landscape of Palatinate in Southwest Germany along a pesticide gradient. In a semi-field study, we captured reproductively active common toad pairs of five breeding ponds with different pesticide contamination level and kept them in a net cage until spawning. Toads from more contaminated ponds showed an increased fecundity (more eggs) but decreased fertilization rates (fewer hatching tadpoles) as well as lower survival rates and reduced size in Gosner stage 25, suggesting that the higher exposed populations suffer from long-term reproductive impairments. In combination with acute toxicity effects, the detected sublethal effects, which are mostly not addressed in the ecological risk assessment of pesticides, pose a serious threat on amphibian populations in agricultural landscapes.

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“…Despite the global decrease in tailless frog populations, some species can maintain their viability even under high anthropogenic pollution (Zhelev et al, 2018). One of these species is Pelophylax ridibundus (Anura; Ranidae).…”

Section: Introductionmentioning

confidence: 99%

The morphometric and erythrometric analyses of Pelophylax ridibundus living in anthropogenic pollution resources

Dönmez¹,

Şi̇şman²

2021

Turk J Zool

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The health status of Pelophylax ridibundus species living in anthropogenic pollution sources in Erzurum (Turkey) were investigated. Firstly, heavy metal concentrations of water and sediment samples taken from where the frogs live and in the frog liver and were determined by instrumental analysis. Secondly, morphometric (fluctuating asymmetry-FA, hepatosomatic index-HSI) and erythrometric analyses were performed to reveal the health status of the frogs in the areas. Our study provides the first morphometric datas on the frog in Turkey. Although the metal concentrations in the surface water were high, it was determined that they did not exceed the limit values. However, Cr, Ni, Zn, and As metal concentrations in the sediment were determined to be above the acceptable level. It was also found that some metals accumulated in the livers of the frog due to heavy metal pollution. On the other hand, the FA, HSI values and the erythrocytic nuclear abnormality frequency increased in the frogs living in polluted stations. Moreover, erythrocyte size decreased and nucleated erythrocyte, mitotic erythrocyte, pycnotic erythrocyte, and immature erythrocyte frequencies increased. It was found that there was a correlation between the presence of pollution and the health status 2 of the frogs, and the frog populations were affected negatively by anthropogenic pollution.

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Health status of Pelophylax ridibundus (Amphibia: Ranidae) in a rice paddy ecosystem in Southern Bulgaria and its importance in assessing environmental state: haematological parameters

Cited by 24 publications

References 36 publications

Can road stormwater ponds be successfully exploited by the European green frog (Pelophylax sp.)?

Can road stormwater ponds be successfully exploited by the European green frog (Pelophylax sp.)?

Pesticide exposure affects reproductive capacity of common toads (Bufo bufo) in a viticultural landscape

The morphometric and erythrometric analyses of Pelophylax ridibundus living in anthropogenic pollution resources

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