Hybridization in Howler Monkeys: Current Understanding and Future Directions

Cortés‐Ortiz, Liliana; Agostini, Ilaria; Aguiar, Lucas M.; Kelaita, Mary A.; Silva, Felipe Ennes; Bicca‐Marques, Júlio César

doi:10.1007/978-1-4939-1957-4_5

Cited by 23 publications

(20 citation statements)

References 78 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Low numbers of male hybrids may suggest Haldane's rule (Haldane, ), which states that crosses between different species reduces viability of hybrid males more than females. For example, it has been argued that first generation hybrid females of howler monkeys ( Alouatta spp) tend to backcross with pure males, which results in more viable male offspring (Cortés‐Ortiz et al, ). The low number of hybrids also agrees with observations (Brockelman, unpublished) suggesting that mixed‐species gibbon groups are unstable and that hybrids do not reproduce as well as the parent species.…”

Section: Discussionmentioning

confidence: 99%

The ecology of white‐handed and pileated gibbons in a zone of overlap and hybridization in Thailand

Asensio

José-Domínguez

Kongrit

et al. 2017

American J Phys Anthropol

View full text Add to dashboard Cite

Ecological similarities support that competition between the gibbon species exists and takes the form of interspecific territoriality. However, we could not find any clear mechanism of niche partitioning favoring coexistence between species. Our findings suggest that the contact zone is unstable and is maintained by dispersal inward from groups of the parental species. The relatively low numbers of mixed-species groups and hybrids found suggests a high degree of premating reproductive isolation, perhaps mediated by interspecific miscommunication. The existence of hybrids and backcrosses potentially undetectable from phenotypic characters alone raises the possibility of more widespread introgression than has been evident. Hence, while interspecific territoriality should reduce the rate of gene transfer, it would not necessarily present a barrier to introgression into contiguous populations of the opposite species.

show abstract

Section: Discussionmentioning

confidence: 99%

The ecology of white‐handed and pileated gibbons in a zone of overlap and hybridization in Thailand

Asensio

José-Domínguez

Kongrit

et al. 2017

American J Phys Anthropol

View full text Add to dashboard Cite

show abstract

“…Here, we examined locus-specific differentiation and introgression using reduced-representation sequencing data from a bimodal howler monkey hybrid zone (Alouatta palliata × Alouatta pigra) (Cortés-Ortiz et al, 2015) and from allopatric parental populations to test predictions about the forms of selection acting on loci associated with reproductive isolation. The parental species diverged ~3 Ma (Cortés-Ortiz et al, 2003) and have many important differences in their morphology (Kelaita, Dias, Aguilar-Cucurachi, Canales-Espinosa, & Cortés-Ortiz, 2011;Smith, 1970), cytogenetics (Steinberg et al, 2008), social systems (Chapman & Balcomb, 1998;Ho et al, 2014) and loud vocalizations (Bergman et al, 2016).…”

mentioning

confidence: 99%

Multiple forms of selection shape reproductive isolation in a primate hybrid zone

2018

View full text Add to dashboard Cite

Speciation occurs when populations diverge and become reproductively isolated from each other. Natural selection is commonly accepted to play a large role in this process, and it has been widely assumed that reproductive isolation often results as a by‐product of divergence driven by adaptation in allopatry. When such populations come into secondary contact, reinforcement can act to strengthen reproductive isolation, but the frequency and importance of this process are still unknown. Here, we explored genomic signatures of selection in allopatry and sympatry for loci associated with reproductive isolation using a natural primate hybrid zone. By analysing reduced‐representation sequencing data, we quantified admixture and population structure across a howler monkey hybrid zone and examined the relationship between locus‐specific differentiation and introgression. We detected extensive admixture that was mostly limited to the narrow contact zone. Loci with reduced introgression into the heterospecific genomic background (the pattern expected for loci associated with reproductive isolation due to selection against hybrids) were significantly more differentiated between allopatric parental populations than loci with neutral and increased introgression, supporting the hypothesis that reproductive isolation is a by‐product of divergence in allopatry. Further, loci with reduced introgression showed greater differentiation in sympatry than in allopatry, suggesting a role for reinforcement. Thus, our results reflect multiple forms of selection that have shaped reproductive isolation in this system. We conclude that reproductive isolation may have initially been driven by divergence in allopatry, but later reinforced by divergent selection in sympatry.

show abstract

“…On the other hand, the weak response of A. pigra males to A. palliata calls suggests that they are not identifying these males as potential rivals to be confronted/defended against. Ignoring the calls of A. palliata males might therefore contribute to pairings of A. palliata males with A. pigra females, which is the hypothesized directional bias of F1 hybrid offspring in sympatry (Cortés‐Ortiz et al, ). The lack of response by A. pigra males to A. palliata callers could have influenced hybridization patterns when these two species first encountered each other in southern Mexico, and might continue affecting the dynamics of hybridization in the current hybrid zone.…”

Section: Discussionmentioning

confidence: 99%

“…All six A. palliata and four of six A. pigra groups had small infants present in the group; however, the presence or absence of small infants did not change between trials on the same group. Groups were part of ongoing census and behavioral studies (e.g., Ho et al, ) and males were thus identifiable based on distinctive markings (e.g., coloration of testicles; light colored sections of fur on tail or feet; scars) and photographs taken during prior capture (Cortés‐Ortiz et al, ).…”

Section: Methodsmentioning

confidence: 99%

“…Tests in these allopatric populations allowed us to simulate first contact between naïve subjects of both purebred species. On the basis of the biased hybridization inferred for first generation hybrids (Cortés‐Ortiz et al, ), we predicted that A. pigra would have a weak response to the heterospecific call and a strong response to the conspecific call, whereas A. palliata should recognize both species as rivals. A similar study with hybrid zone animals is currently underway.…”

Section: Introductionmentioning

confidence: 98%

See 1 more Smart Citation

Alouatta pigra males ignore A. palliata loud calls: A case of failed rival recognition?

Kitchen

Cortés‐Ortiz

Dias

et al. 2018

American J Phys Anthropol

View full text Add to dashboard Cite

Despite striking differences in vocalizations, A. palliata respond equally to calls from both species whereas A. pigra respond only to conspecifics. This apparent failure of A. pigra males to recognize interspecific rivals might have biased hybridization (F1 hybrids = male A. palliata x female A. pigra), a pattern previously hypothesized based on genetic analysis of hybrids. Given that A. pigra males could be losing reproductive opportunities to heterospecific males, our findings add to growing evidence of potential costs for overly specific species recognition.

show abstract

Hybridization in Howler Monkeys: Current Understanding and Future Directions

Cited by 23 publications

References 78 publications

The ecology of white‐handed and pileated gibbons in a zone of overlap and hybridization in Thailand

The ecology of white‐handed and pileated gibbons in a zone of overlap and hybridization in Thailand

Multiple forms of selection shape reproductive isolation in a primate hybrid zone

Alouatta pigra males ignore A. palliata loud calls: A case of failed rival recognition?

Contact Info

Product

Resources

About