The pitfalls of regression to the mean in bivariate timeseries analysis

bioRxiv (Cold Spring Harbor Laboratory), Год журнала: 2023, Номер unknown

Опубликована: Дек. 4, 2023

Abstract 1.Plastic traits, capable of taking multiple forms, often correlate with one another or features the environment when measured over time. These patterns correlated change are sometimes assumed to reflect adaptive plasticity, such as coevolved “integrated phenotypes” within individuals, synchronisation between social mating partners, responses environmental gradients. 2. Such plasticity is ecologically and evolutionarily important, so there considerable interest in understanding how it varies individuals groups. However, “regression mean”, statistical tendency for traits revert average value, may create illusion strong bivariate correlations timeseries data, including substantial but meaningless variation individuals. 3. We demonstrate this using simulated real revealing regression mean can bias both samples. then show, however, that its effects be eliminated autoregressive models. 4. also offer a detailed discussion why arises, introducing idea ecological phenomenon.

Язык: Английский

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Female chronotype and aggression covary on different hierarchical levels in a songbird

Animal Behaviour, Год журнала: 2024, Номер 210, С. 75 - 83

Опубликована: Фев. 19, 2024

Язык: Английский

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Socially plastic responses in females are robust to evolutionary manipulations of adult sex ratio and adult nutrition

Journal of Evolutionary Biology, Год журнала: 2024, Номер 37(10), С. 1215 - 1224

Опубликована: Авг. 23, 2024

Socially plastic behaviours are widespread among animals and can have a significant impact on fitness. Here, we investigated whether the socially responses of female Drosophila melanogaster evolve in predictable ways following long-term manipulation adult sex ratio nutrient availability. Previous reports show that D. respond plastically to their same-sex social environment lay significantly fewer eggs after mating when previously exposed other females. In this study, tested 2 hypotheses, using females drawn from lines with an evolutionary history exposure variation (male-biased, female-biased or equal ratio) nutritional (high low quality). The first was elevated competition regimes would select for increased fecundity comparison lines. second these also be magnified under poor resource regimes. Neither hypothesis supported. Instead, found were retained all did not differ across any them. lack differences does appear due insufficient selection, as observe virgin egg-laying patterns according regime. magnitude predicted plasticity is consistent idea costs maintaining low, benefits high, itself relatively hard wired.

Язык: Английский

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Swimming performance, but not metabolism, is related to a boldness‐activity syndrome in schoolmaster snapper (Lutjanus apodus)

Journal of Fish Biology, Год журнала: 2024, Номер unknown

Опубликована: Сен. 9, 2024

Abstract Commercial overexploitation and climate change can alter the physiology behavior of marine organisms, although intraspecific phenotypic responses to such changes vary greatly depending on environment, species, severity stressor. Under pace‐of‐life syndrome (POLS) hypothesis, behavior, physiology, life‐history traits are linked, thus, affected by selection targeting any aspect organismal biology. However, these links understudied in tropical fishes, further work is needed better understand impacts fisheries wild stocks. Moreover, regions have a greater reliance fisheries; thus investigations should focus species with substantial socioeconomic value ensure benefits at local level. This study aimed address this need measuring (boldness activity), metabolism, swimming performance (using critical swim speed [U crit ] test) schoolmaster snapper Lutjanus apodus Eleuthera, Bahamas. We report strong positive correlation between boldness activity, high repeatability behavioral metrics, two groupings that were consistent “proactive” “reactive” types. These types differed significantly their performance, reactive individuals having 13.1% higher mean U . In contrast, no significant differences found measured metabolic parameters first investigate using novel ecologically relevant comparison data suggest additional research predict success proactive/reactive fish if overexploited as influenced change.

Язык: Английский

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Socially plastic responses in females are robust to evolutionary manipulations of adult sex ratio and adult nutrition

bioRxiv (Cold Spring Harbor Laboratory), Год журнала: 2023, Номер unknown

Опубликована: Сен. 29, 2023

Abstract Background Socially plastic behaviours are widespread among animals and can have a significant impact on fitness. Here we investigated whether the socially responses of female Drosophila melanogaster evolve in predictable ways following long term manipulation adult sex ratio nutrient availability. Previous reports show that D. respond plastically to their immediate same-sex social environment by altering fecundity, laying fewer eggs after they mate if previously exposed other females, Fecundity is also highly sensitive female’s nutritional status, being significantly reduced when dietary protein particular scarce. On this basis, predicted an evolutionary history exposure variation would select strongly upon fecundity responses. Results We used females had been drawn from replicated lines experienced male biased, biased or equal ratios either standard low-quality nutrition. tested specific predictions elevated competition (in female-biased regimes) for increasingly presence conspecifics, these be magnified under poor resource regimes. In contrast expectations, found were strikingly robust perturbations both sexual availability did not differ across any The lack response explained insufficient strength selection. For example, held isolation prior mating, observe virgin egg according regime retention regime. Conclusion existence magnitude plasticity consistent with idea costs maintaining low, benefits high, itself hard wired.

Язык: Английский

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