Articles tagged with Cooperative Breeding
Parasites alter male calls, creating a complex pattern that can change how females evaluate potential partners. Females prefer lower-frequency calls, but also weigh the risk of parasite infection, making mate choice a nuanced decision.
A new study reveals how beluga whales in Alaska's Bristol Bay survive through a surprising strategy: they mate with multiple partners over several years. This polygynandrous system helps maintain genetic diversity despite the population's small size and isolation.
Scientists at the University of Sheffield discovered long-tailed tits' remarkable family bonds persisting throughout migration. The study found that these tiny birds migrate in family units and become crucial helpers for related pairs, mirroring human support systems.
A study by Osaka Metropolitan University reveals that fish use physical punishment to promote helping behavior in their offspring, demonstrating advanced social and cognitive abilities. The research highlights the presence of punishment in animal societies, bridging a gap in understanding cooperative behavior and its mechanisms.
A new study by Bar-Ilan University explores the impact of habitat disturbance on the Arabian babbler, a socially cooperative bird species. The research found that modified habitats accelerate key life history events in Arabian babblers, leading to reduced survival rates among individuals.
Researchers found that mothers increase egg size when they have more female helpers to feed their chicks. The study suggests that helpers allow mothers to invest more in offspring at the egg stage by lightening maternal workloads at the chick-feeding stage.
In cooperative bird societies, mothers lay larger eggs for more help with nestling care, allowing them to focus on prenatal investment. This strategy enables helpers to contribute indirectly, benefiting offspring development.
Research on ostriches found that optimal breeding group sizes vary depending on the balance of males and females within it. The study showed that males have a single optimal group size, while females have multiple optimal sizes due to cooperative care. Intermediate-sized groups were not optimal for reproductive success in either sex.
A Hebrew University study reveals that desert isopods, when predators like scorpions are nearby, prefer larger females but settle for smaller ones instead. Males also adjust their behavior, with smaller males opting for second-best females closer to the predator.
Researchers find that cooperative breeding in animal societies increases survival chances of carers, leading to higher reproductive success. The study also reveals the relative importance of kin selection and individual selection varies depending on environmental conditions.
In Chinese penduline tits, egg burial is primarily done to prevent eggs from rolling out of the nest in strong winds, a function that may have evolved in ancient species of the genus. This study found that 45% of eggs in experimental nests showed signs of being blown out, highlighting the importance of egg burial in these birds.
A study by University of Groningen biologists found that female Seychelles warblers who receive help from subordinates age more slowly and live longer. The birds' telomere length, a marker of aging, also decreases with assistance. This positive feedback system suggests that cooperative breeding can increase an individual's lifespan.
Scientists discover that birds form family groups before helping at the nest, resolving long-standing puzzle of cooperative breeding's evolution. The two-step framework suggests that stable environments favor family living, while environmental variability promotes helping at the nest.
African cichlid fishes evolved cooperative societies primarily due to fear of predators, which reduced their chances of being eaten. This alternative path to cooperation differs from other vertebrates, where relatedness is a key factor.
African starlings exhibit cooperative breeding behavior in savannas with high rainfall uncertainty, maximizing reproductive success. The strategy may become more widespread as environmental variability increases due to climate change.
Researchers found that over one-third of African starlings engage in cooperative breeding, a behavior typically seen in birds and other animals, due to the unpredictability of their savanna habitats. In contrast, non-cooperative species live in forests with more stable environments.