Mating system and kin relationship between adults and young in the shell-brooding cichlid fish Neolamprologus meeli in Lake Tanganyika

Sunobe, Tomoki; Munehara, Hiroyuki

doi:10.1007/s10164-002-0086-3

Cited by 17 publications

(14 citation statements)

References 18 publications

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“…2005), sneaker fertilization in a gastropod shell breeder (Katoh et al . 2005), and unrelated offspring in the nests of another shell breeder (Sunobe & Munehara 2003). Here, we investigate the genetic parentage of broods of the socially monogamous Lamprologini species Variabilichromis moorii .…”

Section: Introductionmentioning

confidence: 99%

High frequency of multiple paternity in broods of a socially monogamous cichlid fish with biparental nest defence

et al. 2008

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In several animal taxa, genetic analyses have demonstrated that social monogamy and biparental brood care do not preclude polygamous reproduction. Few studies have been conducted in fish, but in fish species without alternative reproductive phenotypes, social monogamy was largely congruent with genetic parentage. In contrast to these findings, we report an exceptionally high level of multiple paternity in a socially monogamous cichlid fish with biparental nest defence (Variabilichromis moorii), inferred from microsatellite and mitochondrial data of 10 broods. Whereas all offspring in a nest shared a common mother, each brood was sired by 2 to > 10 males. None of the inferred sires was assigned a large proportion of the brood. Paternity was estimated as the minimum number of sires required to explain multilocus offspring genotypes, and as the maximum-likelihood number of sires given population allele frequencies. Analysis of simulated brood genotypes suggested that, although these two methods tend to under- and overestimate, respectively, the true number of sires, primary sires with many offspring in a brood would have been detected. Hence, the genetic data indicate that the nest tending males suffer substantial cuckoldry and provide alloparental care for a large number of unrelated fry. We have no data on the social status of the cuckolding males, but due to synchronous spawning of pairs and commitment to brood care of paired males, it is possible that most of the parasitic spawners are solitary males.

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Section: Introductionmentioning

confidence: 99%

High frequency of multiple paternity in broods of a socially monogamous cichlid fish with biparental nest defence

et al. 2008

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“…are likely to wander into the territory of a male L. ocellatus, lending ecological validity to the experimental design. Furthermore, the two species also compete for shells, which are used for shelter and as breeding sites (Bills, 1997;Brandtmann et al, 1999;Sato and Gashagaza, 1997;Sunobe and Munehara, 2003). In particular, female Lepidiolamprologus sp.…”

Section: Materials and Methods Study Sites And Speciesmentioning

confidence: 99%

Fight, fatigue, and flight: narrowing of attention to a threat compensates for decreased anti-predator vigilance

Ota

2018

Journal of Experimental Biology

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Fighting carries a predation risk because animals have limited attention, constraining their ability to simultaneously engage in aggression and anti-predator vigilance. However, the influence of interspecific aggression and fatigue on the predation cost of fighting is seldom examined, although both are unignorable aspects of fighting. Here, I incorporated both factors in a series of field experiments on the cichlid If territorial males respond more strongly to conspecific territorial intruders than to heterospecific intruders, then they should delay escape more frequently during intraspecific fighting than during interspecific fighting. Consequently, although I predicted that vigilance would be decreased as fighting progresses in both cases, intraspecific aggression should decrease vigilance more than interspecific aggression. Males were also exposed to a predator approaching at different (slow or fast) speeds during these fighting bouts. Delays in predator detection and flight initiation were quantified and these predictions were tested. As predicted, males responded more strongly to intraspecific intruders, resulting in slower predator detection and fleeing times than when encountering interspecific intruders. Furthermore, flight latency decreased with increasing fight duration, suggesting that fatigue negatively influenced escape responses. However, contrary to the prediction, the vigilance decrement rate was faster in response to slow predators than in response to rapid predators, and was not influenced by intruder identity. This suggests that fighting males reserve their attention for information critical to their survival and are less vigilant toward a less-threatening (slowly approaching) predator. This cognitive allocation may be an adaptive compensation for fatigue-related low vigilance during fighting.

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“…Social behavior has been demonstrated to have an inconsistent relationship with genetic parentage in cichlids. For example, social monogamy concurred with genetic monogamy in several mouthbrooders and substrate spawners (Taylor et al 2003;Egger et al 2006;Sch€ adelin et al 2015), whereas other socially monogamous substrate spawners with biparental nest defense showed a high level of multiple paternity (Sunobe and Munehara 2003;Sefc et al 2008).…”

Section: Introductionmentioning

confidence: 98%

Same school, different conduct: rates of multiple paternity vary within a mixed‐species breeding school of semi‐pelagic cichlid fish (Cyprichromisspp.)

Anderson

Werdenig

Koblmüller

et al. 2015

Ecology and Evolution

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Mating system variability is known to exist between and within species, often due to environmental influences. An open question is whether, vice versa, similar environmental conditions entail congruent mating behavior, for example in terms of multiple paternity, in species or populations sharing largely comparable breeding modes. This study employed microsatellite markers to investigate the incidence of multiple paternity in Cyprichromis coloratus and Cyprichromis leptosoma, two sympatric, closely related, mouthbrooding Lake Tanganyika cichlids with similar ecological and behavioral characteristics including the formation of open‐water schools. Mouthbrooding females of both species were collected from the same mixed‐species breeding school at the same time, minimizing environmental variation during courtship and mating. In C. coloratus, four of 12 broods had more than one sire, with a mean of 1.33 reconstructed sires per brood. C. leptosoma exhibited multiple paternity in 18 of 22 broods, with a mean of 2.59 or 2.86 reconstructed sires per brood according to the programs gerud and colony, respectively. In addition, two broods were found to contain offspring transplanted from another brood. There was no significant difference in brood size between species, but mean sire number did differ significantly. Hence, substantial similarity in reproductive behavior along with shared environmental conditions during courtship and spawning did not lead to equal rates of polyandry or sneaking in the two species.

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Mating system and kin relationship between adults and young in the shell-brooding cichlid fish Neolamprologus meeli in Lake Tanganyika

Cited by 17 publications

References 18 publications

High frequency of multiple paternity in broods of a socially monogamous cichlid fish with biparental nest defence

High frequency of multiple paternity in broods of a socially monogamous cichlid fish with biparental nest defence

Fight, fatigue, and flight: narrowing of attention to a threat compensates for decreased anti-predator vigilance

Same school, different conduct: rates of multiple paternity vary within a mixed‐species breeding school of semi‐pelagic cichlid fish (Cyprichromisspp.)

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