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Peter Templesmith - One of the best experts on this subject based on the ideXlab platform.
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females choose mates based on Genetic Relatedness in a small dasyurid marsupial the agile antechinus antechinus agilis
PLOS ONE, 2015Co-Authors: Marissa L Parrott, Simon J Ward, Peter Templesmith, Lynne SelwoodAbstract:Females in a variety of taxa mate with more than one male during a single oestrus and exhibit mate preferences for Genetically compatible males, but the influence of female mate choice on siring success is not clearly understood. Whether females choose to mate with more than one male or endure forced copulations is also often unknown. Here, we examined the effects of Genetic Relatedness on female mate choice and siring success in a small semelparous carnivorous marsupial, the agile antechinus (Antechinus agilis), during two consecutive breeding seasons. Experimental trials were conducted in captivity over periods of 72 hours using interconnected enclosures in which female antechinus could choose to access any of four separated males, but males were only able to access females that entered their quarters. Females had access to two Genetically similar and two Genetically dissimilar males simultaneously and all behavioural interactions were observed and scored from continuous video recordings. Genetic similarity between mates and paternity of young was determined by microsatellite analyses. Some females chose to enter and mate with more than one male during a single oestrus period. Although females investigated all males, they spent significantly more time visiting, and mated more times with, Genetically dissimilar males. Males that were Genetically dissimilar to the female sired 88% of subsequent offspring. Whilst males mated readily with most females, they rejected the advances of some receptive females, indicating a previously unexpected level of male mate choice. The results show that Genetic Relatedness between mates has a significant influence on mate choice, breeding and siring success in the agile antechinus.
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olfactory cues Genetic Relatedness and female mate choice in the agile antechinus antechinus agilis
Behavioral Ecology and Sociobiology, 2007Co-Authors: Marissa L Parrott, Simon J Ward, Peter TemplesmithAbstract:Females show mate preferences for males that are Genetically dissimilar to themselves in a variety of taxa, but how females choose these males is not clearly understood. In this study, we examined the effects of olfactory stimuli and Genetic Relatedness on female mate choice in a small carnivorous marsupial, the agile antechinus (Antechinus agilis), during two breeding seasons. Captive female antechinus in oestrus were provided with a combination of male urine and body scent from two novel males, one more Genetically similar and one more dissimilar to the females, in a Y-maze olfactometer. Genetic Relatedness between females and pairs of males was determined using highly polymorphic, species-specific, microsatellite markers. Females consistently chose to visit the scents of males that were Genetically dissimilar to themselves first, spent significantly more time near the source of those scents and showed more sexual and non-exploratory behaviours near those scents. These data demonstrate that chemosensory cues are important in mate choice in the agile antechinus and that females prefer males that are Genetically dissimilar to themselves.
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Genetic similarity not male size influences female mate choice in the agile antechinus antechinus agilis
Australian Journal of Zoology, 2006Co-Authors: Marissa L Parrott, Simon J Ward, Peter TemplesmithAbstract:Our research investigates the effects of Genetic Relatedness between mates and male size on female mate choice in the agile antechinus (Antechinus agilis). Females were provided with a simultaneous choice between one large and one small male, with a minimum 5 g (~20% of male weight) difference between males, in specially designed mate-choice enclosures. Genetic Relatedness between males and females was determined using highly polymorphic, species-specific, microsatellite markers. Male size did not influence mate choice, with approximately equal numbers of large and small males chosen. Females chose males that were more Genetically dissimilar to themselves significantly more times and showed significantly more sexual and non-exploratory behaviours near the Genetically dissimilar males. The results show that, when free female mate choice is possible, female agile antechinus choose males on the basis of Genetic Relatedness, rather than male size.
Marissa L Parrott - One of the best experts on this subject based on the ideXlab platform.
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females choose mates based on Genetic Relatedness in a small dasyurid marsupial the agile antechinus antechinus agilis
PLOS ONE, 2015Co-Authors: Marissa L Parrott, Simon J Ward, Peter Templesmith, Lynne SelwoodAbstract:Females in a variety of taxa mate with more than one male during a single oestrus and exhibit mate preferences for Genetically compatible males, but the influence of female mate choice on siring success is not clearly understood. Whether females choose to mate with more than one male or endure forced copulations is also often unknown. Here, we examined the effects of Genetic Relatedness on female mate choice and siring success in a small semelparous carnivorous marsupial, the agile antechinus (Antechinus agilis), during two consecutive breeding seasons. Experimental trials were conducted in captivity over periods of 72 hours using interconnected enclosures in which female antechinus could choose to access any of four separated males, but males were only able to access females that entered their quarters. Females had access to two Genetically similar and two Genetically dissimilar males simultaneously and all behavioural interactions were observed and scored from continuous video recordings. Genetic similarity between mates and paternity of young was determined by microsatellite analyses. Some females chose to enter and mate with more than one male during a single oestrus period. Although females investigated all males, they spent significantly more time visiting, and mated more times with, Genetically dissimilar males. Males that were Genetically dissimilar to the female sired 88% of subsequent offspring. Whilst males mated readily with most females, they rejected the advances of some receptive females, indicating a previously unexpected level of male mate choice. The results show that Genetic Relatedness between mates has a significant influence on mate choice, breeding and siring success in the agile antechinus.
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olfactory cues Genetic Relatedness and female mate choice in the agile antechinus antechinus agilis
Behavioral Ecology and Sociobiology, 2007Co-Authors: Marissa L Parrott, Simon J Ward, Peter TemplesmithAbstract:Females show mate preferences for males that are Genetically dissimilar to themselves in a variety of taxa, but how females choose these males is not clearly understood. In this study, we examined the effects of olfactory stimuli and Genetic Relatedness on female mate choice in a small carnivorous marsupial, the agile antechinus (Antechinus agilis), during two breeding seasons. Captive female antechinus in oestrus were provided with a combination of male urine and body scent from two novel males, one more Genetically similar and one more dissimilar to the females, in a Y-maze olfactometer. Genetic Relatedness between females and pairs of males was determined using highly polymorphic, species-specific, microsatellite markers. Females consistently chose to visit the scents of males that were Genetically dissimilar to themselves first, spent significantly more time near the source of those scents and showed more sexual and non-exploratory behaviours near those scents. These data demonstrate that chemosensory cues are important in mate choice in the agile antechinus and that females prefer males that are Genetically dissimilar to themselves.
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Genetic similarity not male size influences female mate choice in the agile antechinus antechinus agilis
Australian Journal of Zoology, 2006Co-Authors: Marissa L Parrott, Simon J Ward, Peter TemplesmithAbstract:Our research investigates the effects of Genetic Relatedness between mates and male size on female mate choice in the agile antechinus (Antechinus agilis). Females were provided with a simultaneous choice between one large and one small male, with a minimum 5 g (~20% of male weight) difference between males, in specially designed mate-choice enclosures. Genetic Relatedness between males and females was determined using highly polymorphic, species-specific, microsatellite markers. Male size did not influence mate choice, with approximately equal numbers of large and small males chosen. Females chose males that were more Genetically dissimilar to themselves significantly more times and showed significantly more sexual and non-exploratory behaviours near the Genetically dissimilar males. The results show that, when free female mate choice is possible, female agile antechinus choose males on the basis of Genetic Relatedness, rather than male size.
Marc Struelens - One of the best experts on this subject based on the ideXlab platform.
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Genetic Relatedness between methicillin susceptible and methicillin resistant staphylococcus aureus results of a national survey
Journal of Antimicrobial Chemotherapy, 2007Co-Authors: Marie Hallin, Ariane Deplano, Olivier Denis, R De Mendonca, R De Ryck, S Rottiers, Marc StruelensAbstract:Objectives: Surveillance of hospital-acquired methicillin-resistant Staphylococcus aureus (HA-MRSA) infections has shown the emergence and spread of several epidemic MRSA clones over the past 10 years in Belgium. Whether these clones have been imported from abroad or else have arisen locally via staphylococcal cassette chromosome mec (SCCmec) acquisition by successful methicillin-susceptible S. aureus (MSSA) clones is unknown. Methods: We determined by PFGE, spa typing, multi-locus sequence typing (MLST) and agr group analysis the Genetic Relatedness of 103 MSSA and 511 MRSA strains from a national survey of patients admitted to 112 Belgian hospitals in 2003. Results: The 103 MSSA strains presented very diverse Genetic backgrounds, they were distributed into 40 distinct PFGE types and clustered in 15 distinct MLST CCs. Up to 45% harboured the same genotype as five major epidemic HA-MRSA clones. These MRSA clones all harbour a type IV SCCmec element. Conclusions: These findings are consistent with multiple recent acquisitions of the more mobile type IV SCCmec by MSSA and suggest that certain Genetic backgrounds are conferring a selective advantage, regardless of the resistance profile. However, since the predominant MSSA and MRSA lineages identified in Belgium are disseminated worldwide, importation of epidemic MRSA strains remains an alternative hypothesis.
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epidemiologic typing and delineation of Genetic Relatedness of methicillin resistant staphylococcus aureus by macrorestriction analysis of genomic dna by using pulsed field gel electrophoresis
Journal of Clinical Microbiology, 1992Co-Authors: Marc Struelens, Ariane Deplano, C Godard, Nicole Maes, Elisabeth Schoutens SerruysAbstract:To evaluate the usefulness of phenotypic and genotypic analyses for the epidemiologic typing of methicillin-resistant Staphylococcus aureus (MRSA), we characterized 64 epidemic MRSA isolates and 10 sporadic methicillin-susceptible S. aureus isolates from a university hospital and 18 MRSA isolates from hospitals in different geographical areas. Chromosomal DNA macrorestriction analysis with SstII was resolved by pulsed-field gel electrophoresis and compared with antibiotype analysis, phage type analysis, and standard genomic DNA restriction analysis with BglII. Indices of the discriminatory ability of these methods were 0.982, 0.959, 0.947, and 0.959, respectively. Macrorestriction patterns of 94% of MRSA isolates from patients, personnel, and the environment associated with a nosocomial outbreak were closely related (similarity coefficient, 85 to 100%). In contrast, methicillin-susceptible S. aureus isolates showed a marked diversity of macrorestriction patterns (median similarity, 41%). MRSA isolates from other geographical areas showed diverse macrorestriction patterns, with the exception of four isolates displaying identical or closely related patterns; these isolates were associated with concurrent outbreaks in four other Belgian hospitals. A concordance of genomic DNA macrorestriction typing with phenotypic methods was observed for 60 to 65% of MRSA isolates, and a concordance with standard DNA restriction analysis was found for 79 to 98% of these isolates. In conclusion, genomic DNA macrorestriction analysis was a useful complement to phenotypic methods for delineating epidemic isolates of MRSA, for identifying their nosocomial reservoirs, and for tracing their intra- and interhospital spread. The Genetic Relatedness of MRSA isolates, as estimated by this technique, appeared to correlate with their space-time clustering.
Simon J Ward - One of the best experts on this subject based on the ideXlab platform.
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females choose mates based on Genetic Relatedness in a small dasyurid marsupial the agile antechinus antechinus agilis
PLOS ONE, 2015Co-Authors: Marissa L Parrott, Simon J Ward, Peter Templesmith, Lynne SelwoodAbstract:Females in a variety of taxa mate with more than one male during a single oestrus and exhibit mate preferences for Genetically compatible males, but the influence of female mate choice on siring success is not clearly understood. Whether females choose to mate with more than one male or endure forced copulations is also often unknown. Here, we examined the effects of Genetic Relatedness on female mate choice and siring success in a small semelparous carnivorous marsupial, the agile antechinus (Antechinus agilis), during two consecutive breeding seasons. Experimental trials were conducted in captivity over periods of 72 hours using interconnected enclosures in which female antechinus could choose to access any of four separated males, but males were only able to access females that entered their quarters. Females had access to two Genetically similar and two Genetically dissimilar males simultaneously and all behavioural interactions were observed and scored from continuous video recordings. Genetic similarity between mates and paternity of young was determined by microsatellite analyses. Some females chose to enter and mate with more than one male during a single oestrus period. Although females investigated all males, they spent significantly more time visiting, and mated more times with, Genetically dissimilar males. Males that were Genetically dissimilar to the female sired 88% of subsequent offspring. Whilst males mated readily with most females, they rejected the advances of some receptive females, indicating a previously unexpected level of male mate choice. The results show that Genetic Relatedness between mates has a significant influence on mate choice, breeding and siring success in the agile antechinus.
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olfactory cues Genetic Relatedness and female mate choice in the agile antechinus antechinus agilis
Behavioral Ecology and Sociobiology, 2007Co-Authors: Marissa L Parrott, Simon J Ward, Peter TemplesmithAbstract:Females show mate preferences for males that are Genetically dissimilar to themselves in a variety of taxa, but how females choose these males is not clearly understood. In this study, we examined the effects of olfactory stimuli and Genetic Relatedness on female mate choice in a small carnivorous marsupial, the agile antechinus (Antechinus agilis), during two breeding seasons. Captive female antechinus in oestrus were provided with a combination of male urine and body scent from two novel males, one more Genetically similar and one more dissimilar to the females, in a Y-maze olfactometer. Genetic Relatedness between females and pairs of males was determined using highly polymorphic, species-specific, microsatellite markers. Females consistently chose to visit the scents of males that were Genetically dissimilar to themselves first, spent significantly more time near the source of those scents and showed more sexual and non-exploratory behaviours near those scents. These data demonstrate that chemosensory cues are important in mate choice in the agile antechinus and that females prefer males that are Genetically dissimilar to themselves.
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Genetic similarity not male size influences female mate choice in the agile antechinus antechinus agilis
Australian Journal of Zoology, 2006Co-Authors: Marissa L Parrott, Simon J Ward, Peter TemplesmithAbstract:Our research investigates the effects of Genetic Relatedness between mates and male size on female mate choice in the agile antechinus (Antechinus agilis). Females were provided with a simultaneous choice between one large and one small male, with a minimum 5 g (~20% of male weight) difference between males, in specially designed mate-choice enclosures. Genetic Relatedness between males and females was determined using highly polymorphic, species-specific, microsatellite markers. Male size did not influence mate choice, with approximately equal numbers of large and small males chosen. Females chose males that were more Genetically dissimilar to themselves significantly more times and showed significantly more sexual and non-exploratory behaviours near the Genetically dissimilar males. The results show that, when free female mate choice is possible, female agile antechinus choose males on the basis of Genetic Relatedness, rather than male size.
Elisabeth Schoutens Serruys - One of the best experts on this subject based on the ideXlab platform.
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epidemiologic typing and delineation of Genetic Relatedness of methicillin resistant staphylococcus aureus by macrorestriction analysis of genomic dna by using pulsed field gel electrophoresis
Journal of Clinical Microbiology, 1992Co-Authors: Marc Struelens, Ariane Deplano, C Godard, Nicole Maes, Elisabeth Schoutens SerruysAbstract:To evaluate the usefulness of phenotypic and genotypic analyses for the epidemiologic typing of methicillin-resistant Staphylococcus aureus (MRSA), we characterized 64 epidemic MRSA isolates and 10 sporadic methicillin-susceptible S. aureus isolates from a university hospital and 18 MRSA isolates from hospitals in different geographical areas. Chromosomal DNA macrorestriction analysis with SstII was resolved by pulsed-field gel electrophoresis and compared with antibiotype analysis, phage type analysis, and standard genomic DNA restriction analysis with BglII. Indices of the discriminatory ability of these methods were 0.982, 0.959, 0.947, and 0.959, respectively. Macrorestriction patterns of 94% of MRSA isolates from patients, personnel, and the environment associated with a nosocomial outbreak were closely related (similarity coefficient, 85 to 100%). In contrast, methicillin-susceptible S. aureus isolates showed a marked diversity of macrorestriction patterns (median similarity, 41%). MRSA isolates from other geographical areas showed diverse macrorestriction patterns, with the exception of four isolates displaying identical or closely related patterns; these isolates were associated with concurrent outbreaks in four other Belgian hospitals. A concordance of genomic DNA macrorestriction typing with phenotypic methods was observed for 60 to 65% of MRSA isolates, and a concordance with standard DNA restriction analysis was found for 79 to 98% of these isolates. In conclusion, genomic DNA macrorestriction analysis was a useful complement to phenotypic methods for delineating epidemic isolates of MRSA, for identifying their nosocomial reservoirs, and for tracing their intra- and interhospital spread. The Genetic Relatedness of MRSA isolates, as estimated by this technique, appeared to correlate with their space-time clustering.