2018
DOI: 10.1111/jzo.12602
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Sex differences in timing and context of dispersal in Damaraland mole‐rats (Fukomys damarensis)

Abstract: Dispersal behaviour in cooperatively breeding mammals often differs between the sexes, which can affect how individuals of both sexes compete for breeding opportunities. However, it is largely unknown how the males and females in social mole‐rats differ in frequency, timing and social context of dispersal. Here we show, in Damaraland mole‐rats (Fukomys damarensis), that rainfall increases dispersal probabilities in both sexes. Dispersal is male biased with males dispersing earlier and more frequently in disper… Show more

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Cited by 27 publications
(55 citation statements)
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“…In case a breeder succession happens, or when a foreign male joins a group which lost its male breeder, a "patchwork family" with offspring of mixed descent can be established. Breeding male turnovers by intruders appear not to be rare (but see Torrents-Ticó et al, 2018), as all parentage studies on wild Fukomys found evidence for it in at least one family group analyzed (F. anselli - Patzenhauerová et al, 2013;F. damarensis -Burland et al, 2002;and F. mechowii -Šumbera et al, 2012).…”
Section: Socioecological Implications Of Sexual Dimorphism In Fukomys Mole-ratsmentioning
confidence: 99%
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“…In case a breeder succession happens, or when a foreign male joins a group which lost its male breeder, a "patchwork family" with offspring of mixed descent can be established. Breeding male turnovers by intruders appear not to be rare (but see Torrents-Ticó et al, 2018), as all parentage studies on wild Fukomys found evidence for it in at least one family group analyzed (F. anselli - Patzenhauerová et al, 2013;F. damarensis -Burland et al, 2002;and F. mechowii -Šumbera et al, 2012).…”
Section: Socioecological Implications Of Sexual Dimorphism In Fukomys Mole-ratsmentioning
confidence: 99%
“…The breeding female in Heterocephalus families may mate with two (seldom more) males at a time (Braude et al, 2020) and in Cryptomys it often has multiple partners (Bishop et al, 2004). In Heterocephalus as well as in Fukomys, more than six generations of pups overlap in average family groups and the majority of offspring remains with their parents and assist in provisioning their siblings instead of reproducing themselves (Burda et al, 2000;Torrents-Ticó et al, 2018). Because of this high degree of philopatry in combination with partitioning of reproductive labor and cooperative breeding, these genera have at times been characterized as eusocial mammals (Burda et al, 2000).…”
Section: Introductionmentioning
confidence: 99%
“…The lack of sex-differences contrasts with the distribution of cooperative behaviours in many other cooperatively breeding species where sex differences are common and often linked to sex differences in philopatry (Clutton-Brock et al 2002). In mole-rats the duration of philopatry differs only marginally between males and females (Braude 2000, Hazell et al 2000, Torrents-Ticó et al 2018b, Hochberg et al 2016) and could be the underlying reason for similar investment in cooperative behaviour across both sexes in naked and other social mole-rat species. However, many sex differences in the behaviour of mammals only manifest after sexual maturity, and an alternative explanation for the lack of sex differences in naked mole-rat non-breeders is that non-breeders are hormonally pre-pubescent and therefore show little sex-specific variation (Faulkes et al 1990, 1991 and 1994).…”
Section: Discussionmentioning
confidence: 99%
“…These patterns are broadly similar to those in Damaraland mole-rats, and the general decline of burrowing behaviour coincides with the age and body mass at which individuals in the wild disperse from their natal group (Hochberg et al 2016, Zöttl et al 2016a, Torrents-Ticó et al 2018a). While breeders and non-breeders show long lifespans in captivity (Dammann and Burda 2006, Buffenstein 2008, Schmidt et al 2013, Ruby et al 2018), most non-breeders in the wild disappear from their natal groups when they reach approximately 2-3 years of age, and subsequently either become breeders in a new group or die during dispersal (but see Young et al 2015, Hochberg et al 2016, Torrents-Ticó et al 2018b). Those that remain in the group have been found to gain body mass and become less active (Jarvis et al 1991, O’Riain et al 1996, Thorley et al 2018).…”
Section: Discussionmentioning
confidence: 99%
“…It is interesting to speculate that these species differences in cortisol response to removal from colony and novel conspecifics might relate to mechanism of reproductive suppression (see section 4.1) and/or dispersal strategy. Damaraland molerats are facultative outbreeders; both males and females will disperse after the death of a breeder, are more likely to disperse after rainfall and also permit immigration into established colonies (Jarvis and Bennett, 1993;Torrents-Ticó et al, 2018). On the other hand, while at least some naked mole-rats show motivation to disperse both in lab and field (Braude, 2000;O'Riain et al, 1996;Toor et al, submitted), they will readily inbreed if an established breeder dies and are generally more xenophobic (Lacey and Sherman, 1991).…”
Section: Social Isolation and Social Noveltymentioning
confidence: 99%