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11 results for “Banded mongoose”
Collective self-assessment in banded mongoose intergroup contests
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Data from: High ambient temperatures are associated with reduced foraging capacity in an equatorial mammal, the banded mongoose (Mungos mungo)
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Reproduction is driven by seasonal environmental variation in an equatorial mammal, the banded mongoose (Mungos mungo)
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Data from: Banded mongooses avoid inbreeding when mating with members of the same natal group
Inbreeding and inbreeding avoidance are key factors in the evolution of animal societies, influencing dispersal and reproductive strategies which can affect relatedness structure and helping behaviours. In cooperative breeding systems, individuals typically avoid inbreeding through reproductive restraint and/or dispersing to breed outside their natal group. However, where groups contain multiple potential mates of varying relatedness, strategies of kin recognition and mate choice may be favoured. Here, we investigate male mate choice and female control of paternity in the banded mongoose (Mungos mungo), a cooperatively breeding mammal where both sexes are often philopatric and mating between relatives is known to occur. We find evidence suggestive of inbreeding depression in banded mongooses, indicating a benefit to avoiding breeding with relatives. Successfully breeding pairs were less related than expected under random mating, which appeared to be driven by both male choice and female control of paternity. Male banded mongooses actively guard females to gain access to mating opportunities, and this guarding behaviour is preferentially directed towards less closely related females. Guard–female relatedness did not affect the guard's probability of gaining reproductive success. However, where mate-guards are unsuccessful, they lose paternity to males that are less related to the females than themselves. Together, our results suggest that both sexes of banded mongoose use kin discrimination to avoid inbreeding. Although this strategy appears to be rare among cooperative breeders, it may be more prominent in species where relatedness to potential mates is variable, and/or where opportunities for dispersal and mating outside of the group are limited.
Data from: Kin discrimination via odour in the cooperatively breeding banded mongoose
Kin discrimination is often beneficial for group-living animals as it aids in inbreeding avoidance and providing nepotistic help. In mammals, the use of olfactory cues in kin discrimination is widespread and may occur through learning the scents of individuals that are likely to be relatives, or by assessing genetic relatedness directly through assessing odour similarity (phenotype matching). We use scent presentations to investigate these possibilities in a wild population of the banded mongoose Mungos mungo, a cooperative breeder in which inbreeding risk is high and females breed communally, disrupting behavioural cues to kinship. We find that adults show heightened behavioural responses to unfamiliar (extra-group) scents than to familiar (within-group) scents. Interestingly, we found that responses to familiar odours, but not unfamiliar odours, varied with relatedness. This suggests that banded mongooses are either able to use an effective behavioural rule to identify likely relatives from within their group, or that phenotype matching is used in the context of within-group kin recognition but not extra-group kin recognition. In other cooperative breeders, familiarity is used within the group and phenotype matching may be used to identify unfamiliar kin. However, for the banded mongoose this pattern may be reversed, most likely due to their unusual breeding system which disrupts within-group behavioural cues to kinship.
On following pages: 25. Alexander's Cusimanse (Crossarchus alexandri); 26. Angolan Cusimanse (Crossarchus ansorgel); 27. Common Cusimanse (Crossarchus obscurus); 28. Flat-headed Cusimanse (Crossarchus platycephalus); 29. Ethiopian Dwarf Mongoose (Helogale hirtula); 30. Common Dwarf Mongoose (Helogale parvula); 31. Pousargues's Mongoose (Dologale dybowskii): 32. Liberian Mongoose (Liberiictis kuhni); 33. Gambian Mongoose (Mungos gambianus); 34. Banded Mongoose (Mungos mungo). in Herpestidae
On following pages: 25. Alexander's Cusimanse (Crossarchus alexandri); 26. Angolan Cusimanse (Crossarchus ansorgel); 27. Common Cusimanse (Crossarchus obscurus); 28. Flat-headed Cusimanse (Crossarchus platycephalus); 29. Ethiopian Dwarf Mongoose (Helogale hirtula); 30. Common Dwarf Mongoose (Helogale parvula); 31. Pousargues's Mongoose (Dologale dybowskii): 32. Liberian Mongoose (Liberiictis kuhni); 33. Gambian Mongoose (Mungos gambianus); 34. Banded Mongoose (Mungos mungo).
The dynamics of social cohesion in response to simulated intergroup conflict in banded mongooses
<p>Intergroup conflict is widespread in nature and is proposed to have strong impacts on the evolution of social behaviour. The conflict-cohesion hypothesis predicts that exposure to intergroup conflict should lead to increased social cohesion to improve group success or resilience in future conflicts. There is evidence to support this prediction from studies of affiliative responses to outgroup threats in some animal societies. However, most of these studies have focused on behavioural changes over short time periods (minutes and hours after exposure to an outgroup), and hence very little is known about the dynamics and durability of responses to intergroup conflict over the longer term. We investigated this question by simulating intergroup encounters in wild banded mongooses (Mungos mungo) and measuring social behaviour before, during, and after these encounters over a five day period. We also ran control trials with non-threatening stimuli. Banded mongooses reacted immediately to intrusion stimuli by vocalising, grouping together and advancing on the stimulus. In the first five minutes after simulated intrusions, we saw an elevation in grooming levels, but in the hour after exposure grooming rates declined sharply, contrary to our expectation. In the two subsequent days grooming rates remained at this depressed rate. In control trials, the initial increase in grooming was not seen, but grooming declined compared in the longer term time periods. Grooming changed across time, but not in the same pattern as during intrusions, suggesting that intrusions had an impact above and beyond that of the experimental set-up. The dynamics of grooming responses were short-lived and more complex than we initially expected. We suggest this unexpected result may be linked to the frequency of aggressive intergroup encounters in this system. Our results indicate short-lived impacts of outgroup threat on measures of social cohesion in this species, but cannot confirm longer term changes.</p>
The dynamics of social cohesion in response to simulated intergroup conflict in banded mongooses
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Data from: Banded mongooses avoid inbreeding when mating with members of the same natal group
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Data from: Kin discrimination via odour in the cooperatively breeding banded mongoose
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Data from: Reproductive competition triggers mass eviction in cooperative banded mongooses
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