Using of fluctuating asymmetry in adult Pelophylax ridibundus (Amphibia: Anura:Ranidae) meristic traits as a method for assessing developmental stability of populationand environmental quality of their habitat: industrial area in southern Bulgaria

Zhelev, Zhivko M.; Tsonev, Stefan; Boyadzhiev, Peter

doi:10.55730/1300-0179.3050

Cited by 7 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Interestingly, this observation represents a typical example of uctuating asymmetry (FA), which is de ned as a long-term change in the body state of the organisms when extreme temperatures or contaminants cause instability during autogeny (Gondim et al, 2020). Fluctuating asymmetry is frequently reported in developing amphibians and has been proposed as a tool for assessing developmental stability of population and environmental quality of amphibian habitat (Zhelev et al, 2022).…”

Section: Discussionmentioning

confidence: 99%

Toxicity of the neonicotinoid insecticides thiamethoxam and imidacloprid on tadpoles of four species of South American amphibians and effects of thiamethoxam on the metamorphosis of Rhinella arenarum

Peña

Natale

Brodeur

2022

Preprint

View full text Add to dashboard Cite

The present study examined the acute and chronic toxicity of the neonicotinoid insecticides imidacloprid and thiamethoxam in neotropical amphibian species from the Pampa region of Argentina. The median lethal concentration after 96h of exposure (96h-LC50) ranged between 11.28 and > 71.2 mg/L amongst all species and development stages tested; indicating that these pesticides are unlikely to cause acute toxicity in the wild. The subchronic toxicity was also low, with 21d-LC50 values ranging between 27.15 and > 71.2 mg/L. However, exposure of developing tadpoles of Rhinella arenarum to thiamethoxam from stage 27 until the completion of metamorphosis showed that treated animals present a significant reduction in metamorphic success together with a smaller size at metamorphosis and an asymmetry in the length of the left and right front arms. These effects, which are observed starting from the lowest concentration tested (9 mg/L), suggest an effect of thiamethoxam on the hypothalamic-pituitary-thyroid (HPT) axis. Given that the observed effects can clearly impair amphibian performance and survival in the wild, further studies employing the same experimental approach but looking at lower environmentally-relevant concentrations are needed.

show abstract

Section: Discussionmentioning

confidence: 99%

Toxicity of the neonicotinoid insecticides thiamethoxam and imidacloprid on tadpoles of four species of South American amphibians and effects of thiamethoxam on the metamorphosis of Rhinella arenarum

Peña

Natale

Brodeur

2022

Preprint

View full text Add to dashboard Cite

show abstract

“…The species is one of the most invasive amphibians of Northern Eurasia [126], often hybridising with local clades, resulting in genetic dilution and population declines [127]. Pelophylax ridibundus can rely on agricultural landscapes as breeding habitats, and the species is highly tolerant to agricultural pollution [128,129]. Pelophylax bedriagae (Camerano, 1882), the Levent Water Frog, was described from Dimashq in the current Syrian Arab Republic [34] (Figure 12).…”

Section: Threats and Conservationmentioning

confidence: 99%

Understanding the Distribution, Behavioural Ecology, and Conservation Status of Asian Pelophylax

Amin,

Borzée

2024

Diversity

View full text Add to dashboard Cite

Understanding species from an ecological and phylogenetic perspective facilitates an understanding of their conservation status in relation to the changing world. The frog genus Pelophylax is among the largest in terms of amphibian biomass in the Palearctic, but species have not been thoroughly studied at the Asian continental scale. The phylogeographic relationship, behavioural ecology, and ecological requirements within the genus need clarification, despite generally good local coverage. Here, for the first time, we conducted a literature review focused on phylogeography and behavioural ecology, supported by ecological niche modelling of twelve Asian Pelophylax lineages. Finally, we compiled the known threats for each of the lineages. We first determined the presence of twelve species and species-candidate lineages. In terms of behavioural ecology, the main difference among lineages is the time to metamorphosis and the time to reach sexual maturity. The ecological models highlighted a match between the known presence of each clade and their suitable habitat and highlighted the Syr Darya drainage on the eastern shore of the Caspian Sea for the non-described Pelophylax “Syr Darya lineage”. Finally, we highlighted the greatest variation among lineages in terms of threats, as some lineages are threatened by numerous factors, whereas others are expanding.

show abstract

“…Population phenogenetic analysis, based on the study of the measures of developmental stability, such as fluctuating asymmetry of morphological characters, in natural populations is a possible approach to obtain information on the nature of observed phenotypic diversity. This approach makes it possible to assess the role of developmental variability, or developmental noise, in the phenotypic diversity and its possible change under various environmental conditions [8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Phenotypic Variation in a Species Range: Another Look (Developmental Stability Study of the Meristic Variation in the Sand Lizard Lacerta agilis)

2022

View full text Add to dashboard Cite

Variation of the meristic characteristics of pholidosis in the sand lizard, Lacerta agilis, was studied both in laboratory experiments and in natural populations. The total phenotypic variability was assessed by the variation of the sum of the number of scales on the left and on the right sides of the body (l + r), while the measure of developmental stability, providing insight into the degree of fluctuating asymmetry, or developmental variability, was assessed by the variation of the difference in the character values on the left and on the right (l − r). Experimental incubation of eggs at different temperatures demonstrates that the minimal level of both kinds of variability corresponds to a certain temperature, which can be characterized as an optimal one, increasing both with an increase and with a decrease in the temperature from this regime. The data demonstrate the crucial role of the temperature impact for the phenotypic variation under study. An increase in the level of developmental variability to the north and to the south from the center part of the species range, in the absence of an obvious trend in geographic variation of the level of total phenotypic variability, assumes an increase in the role of developmental variability in the observed phenotypic diversity at the periphery of the species range. The results obtained indicate the importance of a population phenogenetic approach, based on the developmental stability study in natural populations, to provide certain information supposing the possible nature of phenotypic diversity in a species range.

show abstract

Using of fluctuating asymmetry in adult Pelophylax ridibundus (Amphibia: Anura:Ranidae) meristic traits as a method for assessing developmental stability of populationand environmental quality of their habitat: industrial area in southern Bulgaria

Cited by 7 publications

References 0 publications

Toxicity of the neonicotinoid insecticides thiamethoxam and imidacloprid on tadpoles of four species of South American amphibians and effects of thiamethoxam on the metamorphosis of Rhinella arenarum

Toxicity of the neonicotinoid insecticides thiamethoxam and imidacloprid on tadpoles of four species of South American amphibians and effects of thiamethoxam on the metamorphosis of Rhinella arenarum

Understanding the Distribution, Behavioural Ecology, and Conservation Status of Asian Pelophylax

Phenotypic Variation in a Species Range: Another Look (Developmental Stability Study of the Meristic Variation in the Sand Lizard Lacerta agilis)

Contact Info

Product

Resources

About