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Female reproductive ageing persists despite high infanticide risk in chacma baboons and geladas.
R Soc Open Sci
January 2025
Department of Anthropology, Stony Brook University, Stony Brook, NY, USA.
Across mammals, fertility and offspring survival are often lowest at the beginning and end of females' reproductive careers. However, extrinsic drivers of reproductive success-including infanticide by males-could stochastically obscure these expected age-related trends. Here, we modelled reproductive ageing trajectories in two cercopithecine primates that experience high rates of male infanticide: the chacma baboon () and the gelada ().
View Article and Find Full Text PDFEnvironmental influence and species occurrence of yellowjacket drones in an invaded area.
Sci Rep
January 2025
Grupo de Ecología de Poblaciones de Insectos, Instituto de Investigaciones Forestales y Agropecuarias Bariloche (IFAB) (CONICET - INTA), Modesta Victoria N°4450, San Carlos de Bariloche, Río Negro, 8400, Argentina.
During the mating season, reproductive individuals of numerous insect species gather in rendezvous areas, which increases mating opportunities. Male hymenopterans often have to move considerable distances during a particular season, searching or waiting for receptive females. Such behavior is likely driven by a complex combination of individual and species-specific traits, environmental influence, and landscape cues.
View Article and Find Full Text PDFReproductive and persistence strategy of the liverwort Arnellia fennica after the last glaciation in the area of disjunction in Central Europe (Polish Tatra Mountains, carpathians).
Sci Rep
January 2025
Department of Botany and Evolutionary Ecology, University of Warmia and Mazury in Olsztyn, Plac Łódzki 1, 10‑727, Olsztyn, Poland.
The liverwort Arnellia fennica has a circumarctic distribution with disjunct and scarce localities in the Alps, Carpathians, and Pyrenees. Within the Carpathians, it is only known from the Tatra Mountains (in Poland), where so far only four occurrences have been documented in the forest belt of the limestone part of the Western Tatras. The species is considered a tertiary relict, which owes its survival during the last glaciation period to low-lying locations in areas not covered by ice.
View Article and Find Full Text PDFKisspeptin and Neurokinin B: roles in reproductive health.
Physiol Rev
January 2025
Department of Investigative Medicine, Imperial College London, Hammersmith Hospital, London, United Kingdom.
Kisspeptin and neurokinin B (NKB) play a key role in several physiological processes including in puberty, adult reproductive function including the menstrual cycle, as well as mediating the symptoms of menopause. Infundibular kisspeptin neurons, which co-express NKB, regulate the activity of gonadotropin releasing hormone (GnRH) neurons, and thus the physiological pulsatile secretion of GnRH from the hypothalamus. Outside of their hypothalamic reproductive roles, these peptides are implicated in several physiological functions including sexual behavior and attraction, placental function, and bone health.
View Article and Find Full Text PDFEvaluation of scarification in seed germination and characterization of the early stages of seedling development of Rubus erythroclados.
Braz J Biol
January 2025
Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Sul - IFRS, Núcleo de Ciências Biológicas e Ambientais, Sertão, RS, Brasil.
The shrub Rubus erythroclados Mart. ex Hook.f.
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