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Showing 1 to 15 of 15 for “"Cooperative breeders"”.
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Pup provisioning and artificial pack formation in African wild dog Lycaon pictus in South Africa
Wild dog Lacaon pictus are obligate cooperative breeders with nulliparous helpers contributing to the rearing of a dominant pair's young through pup-provisioning and defence agianst predators. Despite the importance of allo-parental care to the survival of pups and the persistance of packs, few …
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Insect Development and Evolution: Perspectives on Individual and Colony-Level Phenotypes
… are fundamentally different than monomorphic cooperative breeders, and can meaningfully be compared to metazoan organisms with differentiated germ and soma.</p>
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The Improvement in Type of South Dakota Dairy Cattle Through Artificial Breeding
… if offspring from sires used by the South Dakota Cooperative Breeders Association are superior to their dams in type, and third: to determine which sires show the greatest improvement in type.</p>
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Bloat Results From Various Drenchings Including Effectiveness of Penicillin For Prevention
… if offspring from sires used by the South Dakota Cooperative Breeders Association are superior to their dams in type, and third: to determine which sires show the greatest improvement in type.</p>
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Population dynamics in meerkats, Suricata suricatta
Research on cooperatively breeding species has shown that their population dynamics can differ from those of conventional breeders. Populations of obligate cooperators are structured into social groups, the link between individual behaviour and population dynamics is mediated by group-level …
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The Relationship of Dominance, Reproductive State and Stress in a Non-Cooperative Breeder, The Domestic Horse (<em>Equus caballus</em>)
… However, in carnivorous animals that are cooperative breeders, displays of aggression are associated with elevated stress hormone levels (dominancestress hypothesis). The effect of reproductive state on dominance and stress is not addressed within either of these hypotheses. The purpose of …
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Hormones and cooperative behaviours in the Damaraland mole-rat (Fukomys damarensis)
Large individual differences in cooperative contributions are common within animal societies such as cooperative breeders, where helpers care for offspring which are not their own. Understanding this variation has been a major focus in behavioural ecology and while evidence has shown that …
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Individual variation in cooperative behaviour in meerkats
… of many animal societies, particularly in cooperative breeders where individuals assist in the care of young that are not their own. While previous research on these systems has emphasised the plasticity of helping and how it varies with current environmental and social conditions, in this …
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Individual contributions to group behaviour in the cooperatively breeding southern ground-hornbill Bucorvus leadbeateri
Cooperative breeding, in which individuals other than breeders contribute to raising offspring, has been the focus of much scientific research over the past decades. Why do some individuals help to raise offspring that are not their own? In birds, cooperative breeding is found mainly in harsh …
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Eviction Behaviour in the Kalahari Meerkats
Evictions are common in a substantial number of social species, yet they have seldom been studied in detail, and we know relatively little about the causes and consequences of eviction. While previous research has largely focused on the profiles of subordinate females (evictees) that make them most …
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The acquisition and maintenance of dominance in male and female cooperatively breeding meerkats, Suricata suricatta
… status and group persistence in a population of cooperatively breeding meerkats, Suricata suricatta, located in the Southern Kalahari. In Chapters 3 and 4, I characterise the distinct routes that subordinates of both sexes pursue to acquire dominance. While there is variation in the frequency …
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Social structure, individual fitness and the effect of climate in an obligate cooperatively breeding bird, the white-winged chough (Corcorax melanorhamphos)
… species of Australian bird, which are obligate cooperative breeders, meaning they must breed in groups to successfully produce offspring, living in groups from three to up to 20 individuals. Group living in choughs is related to the young individuals' inefficient foraging, with adults providing …
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Social structure, individual fitness and the effect of climate in an obligate cooperatively breeding bird, the white-winged chough (Corcorax melanorhamphos)
… species of Australian bird, which are obligate cooperative breeders, meaning they must breed in groups to successfully produce offspring, living in groups from three to up to 20 individuals. Group living in choughs is related to the young individuals' inefficient foraging, with adults providing …
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The Life History of Damaraland Mole-rats Fukomys damarensis: Growth, Ageing and Behaviour
… no indication of individual specialisation in cooperative activities. Instead, individual differences in helping behaviour are largely the result of age-related changes in the extent to which individuals commit to all forms of helping (Chapter 3); refuting the notion of helper castes. I then …
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Sociality in African mole-rats : exploring how rainfall affects dispersal and genetic exchange in the Natal mole-rat (Cryptomys hottentotus natalensis)
… individuals contribute equally to cooperative behaviours unlike other mole-rats where reproductive individuals exhibit reduced contributions. I found that in winter, individuals were more active during mid-day to coincide with higher soil temperatures, whereas in summer, they showed …