Circular Statistics in Biology

Watson, G. S.; Batschelet, Edward

doi:10.2307/1267831

Cited by 837 publications

(127 citation statements)

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“…Also, a multiple linear regression model was applied to verify whether PVN OXTimmunoreactivity was associated with mood disorders, taking into consideration confounding factors such as sex, age, or postmortem delay. The Mardia-Watson-Wheeler test (Watson, 1982) was used for group comparisons of circular data, including the clock time of death and the month of death. Po0.05 was considered to be significant.…”

Section: Part 2: In Vitro Studies In Cell Linesmentioning

confidence: 99%

Direct Involvement of Androgen Receptor in Oxytocin Gene Expression: Possible Relevance for Mood Disorders

Dai

Zhu

et al. 2017

Neuropsychopharmacol

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Oxytocin (OXT), synthesized in the hypothalamic paraventricular nucleus (PVN) and then released into different brain areas, may play a crucial role in various behaviors and neuropsychiatric disorders, including depression. Testosterone has been proposed by clinical studies to have the opposite effect of oxytocin in these disorders. We began by studying, in the postmortem hypothalamus of fifteen patients with mood disorders and fifteen matched controls, the expression of OXT in the PVN by means of immunocytochemistry (ICC) and the co-localization of OXT and androgen receptor (AR) by means of double labeling ICC. Subsequently, the regulatory effect of AR on OXT gene expression was studied in vitro. We found a higher expression of PVN OXT in the mood disorder patients than in the control subjects, and observed a clear co-localization of AR in OXT-expressing neurons, both in the cytoplasm and in the nucleus. In addition, a significant decrease in OXT-mRNA levels was observed after pre-incubation of the SK-N-SH cells with testosterone. A further potential androgen-responsive element in the human OXT gene promotor was revealed by electrophoretic mobility shift assays and co-transfections in neuroblastoma cells. Finally, in vitro studies demonstrated that AR mediated the down-regulation of OXT gene expression. These results suggest that the fact that OXT and testosterone appear to have opposite effects in neuropsychiatric disorders might be based upon a direct inhibition of AR on OXT transcription, which may provide a novel target for therapeutic strategies in depression.

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Section: Part 2: In Vitro Studies In Cell Linesmentioning

confidence: 99%

Direct Involvement of Androgen Receptor in Oxytocin Gene Expression: Possible Relevance for Mood Disorders

Dai

Zhu

et al. 2017

Neuropsychopharmacol

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“…Because the coefficient of overlap is purely descriptive, we used the Mardia–Watson–Wheeler (MWW) test (Batschelet, 1981) to compare statistically the distribution of detections across the diel cycle for all sampling campaign pairs (Brook et al., 2012; Gerber et al., 2012) in program Oriana (Kovach ,2011). The null hypothesis of a common distribution was rejected if the value of W was larger than the critical value indicated by p < 0.05 (Pewsey et al., 2013).…”

Section: Methodsmentioning

confidence: 99%

“…In terms of our study, a high r‐value denotes that activity of mammals is limited to a particular lunar phase, while a low r‐value indicates that activity is distributed across the lunar cycle. The Rao's spacing test (U) for uniformity around the circular space was used to assess whether activity of mammals was uniform across the lunar cycle (Batschelet, 1981). The Rao's test is more powerful and robust than many other circular goodness‐of‐fit‐tests and is able to analyze bimodal and multimodal distributions, whereas other tests, such as the Rayleigh test and Watson's U 2 , cannot (Bergin, 1991).…”

Section: Methodsmentioning

confidence: 99%

“…The date and time printed on the photographs were used to determine diel activity periods of each species. We assumed that the number of camera trap records taken at various times was correlated with the daily activity patterns of mammals (Linkie & Ridout, 2011, Batschelet, 1981). To maintain statistical independence and reduce bias caused by repeated detections of the same individual, one record of each species per half hour per camera trap site was considered an independent detection, and subsequent records were removed (O'Brien et al., 2003).…”

Section: Methodsmentioning

confidence: 99%

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Temporal interactions and moon illumination effect on mammals in a tropical semievergreen forest of Manas National Park, Assam, India

et al. 2021

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Species interactions play a vital role in structuring mammalian communities by stimulating behavioral responses in varied niche dimensions that affect sympatric associations and predator-prey relationships. We determined temporal overlap and effects of the moon cycle on dominant and sub-dominant mammalian assemblages in Manas National Park, India. A total of 36 species were captured, with 24,865 independent records over 11,294 trap nights. We collected 1,130 photographs of five large-and medium-sized carnivores and 1,541 photographs of 12 small carnivores. Fifty-one percent of records were detected during diurnal period, followed by 38% in nocturnal phase, and 11% during twilight. Small carnivores such as Prionailurus bengalensis and Viverridae spp. were strictly nocturnal, whereas Martes flavigula and Herpestidae spp.were diurnal. Medium-sized carnivores were either nocturnal (Neofelis nebulosa) or diurnal (Cuon alpinus), whereas large-sized carnivores (Panthera tigris, Panthera pardus, and Ursus thibetanus) were cathemeral. A high degree of temporal overlap (>0.75) was found between most sympatric carnivores with distinct activity peaks, while a low overlap (<0.50) was observed between different body-sized carnivores. Viverrids' activity was negatively correlated (r = −0.44, p < 0.01) with lunar cycles, perhaps to increase foraging efficiency or as an anti-predator strategy. Large prey (μ = 133.23°) and small prey (μ = 131.35°) activity were high during brighter nights due to better visual detection in detecting or avoiding predators. Dominant species activity was least affected by the lunar cycle among forest-dependent mammals, whereas subdominant species activity was either lunarphobic or lunarphilic. The study demonstrates the use of passive camera traps in understanding the behavioral rhythms of tropical mammals.

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“…ahol ui,j, ui+1,j, ui,j+1, ui+1,j+1 a mátrix négy szomszédos korrekciós vektora (2.8C ábra). Az A különböző mérési helyzetekben mért Δφ és Δθ értékeket cirkuláris statisztikai módszerrel ábrázoltuk és elemeztük (BATSCHELET 1981). Ehhez az átlagos hibavektorok kiszámítása volt szükséges, amit úgy kaptunk, hogy az összes szöghibához hozzárendeltünk egy egységvektort, melynek iránya éppen maga a szöghiba, majd ezeket a vektorokat összeadtuk.…”

Section:  4 Lépésunclassified

A fénypolarizáció szerepe egyes rovarfajok viselkedésében és a vikingek navigációjában

Farkas¹

2019

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Circular Statistics in Biology

Cited by 837 publications

References 0 publications

Direct Involvement of Androgen Receptor in Oxytocin Gene Expression: Possible Relevance for Mood Disorders

Direct Involvement of Androgen Receptor in Oxytocin Gene Expression: Possible Relevance for Mood Disorders

Temporal interactions and moon illumination effect on mammals in a tropical semievergreen forest of Manas National Park, Assam, India

A fénypolarizáció szerepe egyes rovarfajok viselkedésében és a vikingek navigációjában

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