Intraspecific Differences in Responses of Marsh Frog (<i>Pelophylax ridibundus</i>) Tadpoles Exposed to Environmentally Relevant and Acute Levels of Ammonium Nitrate Fertilizer

Karaoglu, Handan; Kutrup, Bilal; Öğüt, Hamdi

doi:10.1080/02705060.2010.9664378

Cited by 4 publications

(10 citation statements)

References 54 publications

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“…When aquatic contaminants such as SP affect the TH system, endocrine disruption is usually inhibitory as also confirmed in the present study (Calow, ; Fleeger, Carman, & Nisbet, ; Mann et al, ). Beside SP as the ED, Karaoglu, Kutrup, and Ogut () could show the effect of environmentally relevant concentrations of ammonium nitrate fertilizer on metamorphic traits in tadpoles of the marsh frog ( Pelophylax ridibundus ). Cary Coyle and Karasov () showed the inhibiting effect of polybrominated diphenyl ethers on anuran metamorphosis.…”

Section: Discussionmentioning

confidence: 99%

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Altered thyroid hormone levels affect body condition at metamorphosis in larvae of Xenopus laevis

Ruthsatz

Dausmann

Drees

et al. 2018

J of Applied Toxicology

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Chemical, physical and biological environmental stressors may affect the endocrine system, such as the thyroid hormone (TH) axis in larval amphibians with consequences for energy partitioning among development, growth and metabolism. We studied the effects of two TH level affecting compounds, exogenous l-thyroxine (T ) and sodium perchlorate (SP), on various measures of development and body condition in larvae of the African clawed frog (Xenopus laevis). We calculated the scaled mass index, hepatosomatic index and relative tail muscle mass as body condition indices to estimate fitness. Altered TH levels significantly altered the growth, development, survival and body condition in metamorphic larvae in different directions. While exogeno us T reduced growth and accelerated development, SP treatment increased growth but slowed down development. Altered TH levels improved body conditions in both treatments and particularly in larvae of the SP treatment but to the detriment of lower survival rates in both TH level altering treatments. The hepatosomatic index was negatively affected by exogenous T , but not by SP treatment indicating a lower lipid reserve in the liver in larvae of T treatment. These altered TH levels as caused by several environmental stressors may have an influence on individual fitness across life, as body condition at the onset of metamorphosis determines metamorphic and juvenile survival. Further research is needed to determine synergetic effects of environmental stressors on TH levels and its effects on physiological traits such as metabolic rate.

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Section: Discussionmentioning

confidence: 99%

“…When aquatic contaminants such as SP affect theTH system, endocrine disruption is usually inhibitory as also confirmed in the present study (Calow, 1991;Fleeger, Carman, & Nisbet, 2003;Mann et al, 2009). Beside SP as the ED, Karaoglu, Kutrup, and Ogut (2010) could…”

Section: Alteration Of Thyroid Hormone Level Affects Metamorphic Trmentioning

confidence: 99%

Altered thyroid hormone levels affect body condition at metamorphosis in larvae of Xenopus laevis

Ruthsatz

Dausmann

Drees

et al. 2018

J of Applied Toxicology

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“…But in the case of Marsh frog tadpoles, decreasing growth level reached 51% (average 42%) for population belonging the natural habitat. In a previous study with this species, it was determined that different tolerance levels to ammonium nitrate fertilizer developed in two different populations, and a significant decrease in growth was observed (Karaoglu et al, 2010). But contrary to expectation, nitrate caused increased growth in Bufo gargarizans (Wang et al, 2015).…”

Section: Discussionmentioning

confidence: 83%

“…However, amphibian larvae cannot escape from the waterbodies they inhabit, and thus they cannot avoid from contamination . There have been many studies that reported nitrogenous compounds can directly impair tadpole growth and development modify activity levels and lead to decreased survivorship (Karaoglu et al, 2010;Ortiz-Santaliestra et al, 2012;Ilha and Schiesari, 2014;Egea-Serrano et al, 2011;García-Mu˜noz et al, 2011a).…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, subtraction of groundwater and the foundation of dams, feeding channels and weirs have, in the case of some amphibian species, accidentally supplied breeding habitat where otherwise habitat has been wrecked in agroecosystems and in the lack of less moving predators (i.e., fish) these amphibians insist in the agricultural ecosystems (Knutson et al, 2004;Herzon and Helenius, 2008). Accordingly, geographical divergence in tolerance to nitrogenous compounds has been detected even at the intraspecific level (Shinn et al, 2008), oftentimes as a possible consequence of the differential selective pressures imposed by disparate degrees of exposure (Egea-Serrano et al, 2009;Karaoglu et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Effects of Environmentally Relevant Ammonium Nitrate Levels Caused by Agricultural Activities on Four Amphibian Species in The Eastern Black Sea Region

Karaoglu

2022

Turkish JAF Sci.Tech.

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Within the scope of this research, the chronic effects of ammonium nitrate, which is the most widely used fertilizer worldwide, on the tadpoles of Marsh Frog (Pelophylax ridibundus), the Iranian Long-Legged Frog (Rana macrocnemis), the Caucasian Parsley Frog (Pelodytes caucasicus) and the Variable Green Toad (Bufotes variabilis) were examined. To assess the chronic effects of the fertilizer, the tadpoles of all the species were exposed to 0, 5, 10, 15, 20, 25 mg/L concentrations in same conditions. The chronic concentrations were applied from the 25th developmental stage to the 42nd developmental stage. It was defined at the end of the experiments that although there were some variability between different populations of the same species or between different species in the observed effects, chronic levels of ammonium nitrate caused decreased growth rate, prolonging in time to complete metamorphosis, increased abnormalities, and mortality in general. Among the 4 amphibian species, the Variable Green Toad was the most damaged one in terms of growth reduction (on average 31-41 %), abnormality rates (on average 50-75 %), prolonged time to complete metamorphose (14-21 days on average) and mortality rates (%54-100). The most adaptive species and the least damaged one was an Iranian long-legged frog for growth reduction (on average 0-15 %), prolonged time to complete metamorphose (7-9 days on average), and mortality rates (%9-15). All the harmful effects of chronic fertilizer levels caused by agricultural activities in the region had very important for examined species in our researches and it can be said that important environmental and biodiversity problems may occur if certain precautions are not taken regarding the use of the fertilizers and if the attitudes of the farmers on this issue cannot be changed.

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Direct and indirect effects of chronic exposure to ammonium on anuran larvae survivorship, morphology, and swimming speed

2022

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Intraspecific Differences in Responses of Marsh Frog (Pelophylax ridibundus) Tadpoles Exposed to Environmentally Relevant and Acute Levels of Ammonium Nitrate Fertilizer

Cited by 4 publications

References 54 publications

Altered thyroid hormone levels affect body condition at metamorphosis in larvae of Xenopus laevis

Altered thyroid hormone levels affect body condition at metamorphosis in larvae of Xenopus laevis

Effects of Environmentally Relevant Ammonium Nitrate Levels Caused by Agricultural Activities on Four Amphibian Species in The Eastern Black Sea Region

Direct and indirect effects of chronic exposure to ammonium on anuran larvae survivorship, morphology, and swimming speed

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