Weak premating isolation between two parapatric brocket deer species

Carranza, Juan; Roldán, Mar; Peroni, Ellen de Fátima Carvalho; Duarte, José Maurício Barbanti

doi:10.1016/j.mambio.2017.02.009

Cited by 12 publications

(10 citation statements)

References 51 publications

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“…Since the pre-zygotic reproductive barrier between MNE and MGO is fragile [ 63 ], the post-zygotic barrier for sterility of the hybrid seems to keep these two species isolated and evolving independently. Even with wide geographical contact between the Amazon (MNE habitat) and the Cerrado (MGO habitat) for more than 2000 km.…”

Section: Discussionmentioning

confidence: 99%

“…We report the first production of hybrids between MGO and MNE, which were viable until maturity, but presumably infertile. There are no reports of hybrids in the wild, although a weak pre-mating isolation barrier between species has been observed in captivity [ 63 ]. Regarding MAM, reports of captive crossbreeding between cytotypes already exist [ 25 , 75 ], which are explained by the verified lack of a clear pre-mating barrier [ 26 ].…”

Section: Discussionmentioning

confidence: 99%

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Chromosomal Polymorphism and Speciation: The Case of the Genus Mazama (Cetartiodactyla; Cervidae)

Galindo

Martins

Vozdová

et al. 2021

Genes

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Chromosomal polymorphism plays a major role in speciation processes in mammals with high rates of karyotypic evolution, as observed in the family Cervidae. One remarkable example is the genus Mazama that comprises wide inter- and intra-specific chromosomal variability. To evaluate the impact of chromosomal polymorphisms as reproductive barriers within the genus Mazama, inter-specific hybrids between Mazama gouazoubira and Mazama nemorivaga (MGO × MNE) and intra-specific hybrids between cytotypes of Mazama americana (MAM) differing by a tandem (TF) or centric fusion (Robertsonian translocations—RT) were evaluated. MGO × MNE hybrid fertility was evaluated by the seminal quality and testicular histology. MAM hybrids estimation of the meiotic segregation products was performed by sperm-FISH analysis. MGO × MNE hybrids analyses showed different degrees of fertility reduction, from severe subfertility to complete sterility. Regarding MAM, RT, and TF carriers showed a mean value for alternate segregation rate of 97.74%, and 67.23%, and adjacent segregation rate of 1.80%, and 29.07%, respectively. Our results suggested an efficient post-zygotic barrier represented by severe fertility reduction for MGO × MNE and MAM with heterozygous TF. Nevertheless, RT did not show a severe effect on the reproductive fitness in MAM. Our data support the validity of MGO and MNE as different species and reveals cryptic species within MAM.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Chromosomal Polymorphism and Speciation: The Case of the Genus Mazama (Cetartiodactyla; Cervidae)

Galindo

Martins

Vozdová

et al. 2021

Genes

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“…The craniometric study of Rossi (2000), that included an extensive sampling of brocket deer species failed to distinguish two different species of red brockets deer (M. americana and M. bororo) but discriminated by canonical analysis the two gray brockets (M. gouazoubira and M nemorivaga). As a part of an integrative project, Carranza et al (2017) found evidence revealing weak premating behaviour isolation between M. gouazoubira and M nemorivaga, being more common at intraspecific interactions and suggesting discrimination between species.…”

Section: Comparative Craniometrical Studymentioning

confidence: 97%

Craniometrical differentiation of gray brocket deer species from Brazil

González

Mantellatto

Duarte

2018

MACN

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The genus Mazama Rafinesque, 1817 represent a successful adaptive radiation of South American deers, that has a wide distributional range in the Neotropical region, extending from the State of Vera Cruz in Mexico to central Argentina (from sea-level to 4,900 m a.s.l.; see Allen, 1915;Black-Decima et al., 2010;. The taxonomy of the genus is complex and controversial, concerning both the species as well as the subspecies systematics. Until 1850, only two species of Mazama were recognized. In 1878 Sir Victor Brooke performed a detailed review of this genus and recognized six species, but only four of them were well established. In 1898, Lydekker identified seven species, six of them clearly distinguishable. However, when Allen (1915) performed the first systematic review of the genus Mazama, he recognized 16 forms of Rev. Mus.Abstract: The genus Mazama (brocket deer) constitutes successful adaptive radiation, with a wide distribution in the Neotropical region. However, the taxonomy and systematics of its species and subspecies is still controversial. The objective of this contribution was to carry out a comparative craniometric study of specimens deposited in Brazilian museums of M. gouazoubira (Mg) and M. nemorivaga (Mn), in order to characterize these cryptic species. We performed 36 measures on 87 skulls of adult specimens (Mg = 32 females and 27 males; Mn = 14 females and 14 males). The sample was compared by analysis of variance and multivariate analysis of principal components and discriminant. In most cranial measurements, males and females of M. gouazoubira were 5% larger, with the exception of 3 measures: premolar-prosthion, basifacial axis, and least breadth between the orbits, that were larger in males and females of M. nemorivaga. This study showed significant differences between the two taxa that would validate the distinction of both species. To examine in more detail the dynamics of the variation of these two taxa it is necessary to increase the sample size in order to analyse them in a geographical and genetic context. Resumen: Diferenciación craniométrica de las especies de corzuelas pardas de Brasil. El géneroMazama constituye una exitosa radiación adaptativa, con una amplia distribución en la región Neotropical. Sin embargo, la taxonomía y sistemática sus especies y subespecies es todavía motivo de controversias. El objetivo de esta contribución fue realizar un estudio craneométrico comparativo de ejemplares depositados en museos de Brasil de M. gouazoubira (Mg) y M. nemorivaga (Mn), con el fin de caracterizar estas especies cripticas. Se tomaron 36 medidas en 87 cráneos de ejemplares adultos (Mg = 32 hembras y 27 machos; Mn = 14 hembras y 14 machos). La muestra se comparó mediante análisis de la varianza y análisis multivariados de componentes principales y discriminante. En la mayoría de las medidas craneanas los ejemplares machos y hembras de M. gouazoubira fueron un 5% más grandes, con la excepción de 3 medidas: premolar -prosthion, eje basifacial y el ancho menor entre orbitas, que presentaro...

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“…In a recent study with brocket deer of the grey clade, interspecific matings between M. gouazoubira and M. nemorivaga occurred in almost 36% of trials (Carranza et al, 2017). These species are morphologically convergent and also show several copulations within the same ovulation, so chances for post-mating sexual selection appear also high (Carranza et al, 2017). Postmating-prezygotic mechanisms have been shown to effectively reduce gene flow and thus act to maintain species boundaries if fertilization success in conspecific matings is relatively greater than that in heterospecific ones (Howard et al, 1998(Howard et al, , 2009.…”

Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

Biomechanical evaluation of spring system for implant-supported prosthesis: analysis by photoelasticity and extensometry

Goiato

Medeiros

Silva

et al. 2017

Journal of Medical Engineering & Technology

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New systems are released in the odontological market with the objective of bringing improvements and advancements in the clinical success of implants and implant-supported prostheses. The distribution of tension for the bone/implant system of these new systems is important. The purpose of this work was to evaluate, by photoelastic analysis and strain gauges, the distribution of tension for the bone/implant system, using the Slim system. A photoelastic cast with an external hexagon implant was manufactured and a metal prosthesis was screwed below it, with or without the tested system. For the photoelasticity methodology, a photoelastic cast, with or without the tested system, was positioned in a circular polariscope, and axial loads of 100 N were applied to the centre of the crown. The pattern of tension generated was photographed and analysed qualitatively in an imaging programme. For the extensometry methodology, two extensometers were placed in the mesial and distal region of the implant in the photoelastic cast. The axial loads were applied to the group again, with or without the system (n = 10). The t test of independent samples with a significance level of 5% was used for this analysis. This study demonstrated greater tension values for both the photoelastic and extensometry methods when the tested system was used. Clinical studies must be performed to evaluate the tested system because the results might not be clinically significant to a bone reabsorption.

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Weak premating isolation between two parapatric brocket deer species

Cited by 12 publications

References 51 publications

Chromosomal Polymorphism and Speciation: The Case of the Genus Mazama (Cetartiodactyla; Cervidae)

Chromosomal Polymorphism and Speciation: The Case of the Genus Mazama (Cetartiodactyla; Cervidae)

Craniometrical differentiation of gray brocket deer species from Brazil

Biomechanical evaluation of spring system for implant-supported prosthesis: analysis by photoelasticity and extensometry

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