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- W3113240329 endingPage "110870" @default.
- W3113240329 startingPage "110870" @default.
- W3113240329 abstract "Species introduced by human activities can alter the normal functioning of ecosystems promoting negative impacts on native biodiversity, as they can rapidly expand their population size, demonstrating phenotypic plasticity and possible adaptive capacity to novel environments. Twenty years ago, the guttural toad, Sclerophrys gutturalis, was introduced to a peri-urban area of Cape Town, with cooler and drier climatic characteristics than its native source population, Durban, South Africa. Our goal was to understand the phenotypic changes, in terms of physiology and immunity, of populations in native and novel environments. We evaluated body index (BI), field hydration level, plasma corticosterone levels (CORT), proportion of neutrophils: lymphocytes (N: L), plasma bacterial killing ability (BKA), and hematocrit (HTC) in the field, and after standardized stressors (dehydration and movement restriction) in males from the native and invasive populations. Toads from the invasive population presented lower BI and tended to show a lower field hydration state, which is consistent with living in the drier environmental conditions of Cape Town. Additionally, invasive toads also showed higher BKA and N:L ratio under field conditions. After exposure to stressors, invasive animals presented higher BKA than the natives. Individuals from both populations showed increased CORT after dehydration, an intense stressor for these animals. The highest BKA and N:L ratio in the field and after submission to stressors in the laboratory shows that the invasive population has a phenotype that might increase their fitness, leading to adaptive responses in the novel environment and, thus, favoring successful dispersion and population increase." @default.
- W3113240329 created "2020-12-21" @default.
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- W3113240329 creator A5091003862 @default.
- W3113240329 date "2021-03-01" @default.
- W3113240329 modified "2023-10-17" @default.
- W3113240329 title "Challenges of a novel range: Water balance, stress, and immunity in an invasive toad" @default.
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- W3113240329 doi "https://doi.org/10.1016/j.cbpa.2020.110870" @default.
- W3113240329 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33321177" @default.
- W3113240329 hasPublicationYear "2021" @default.
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