The Experts below are selected from a list of 1602 Experts worldwide ranked by ideXlab platform
Jianxu Zhang - One of the best experts on this subject based on the ideXlab platform.
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Duration of the investigation (mean ± SE) of sexually naive Tph2−/− female mice (n control = 7, n drug = 7) to the Urine Odor of male C57BL/6 mice vs. female C57BL/6 mice (estrous) 30 min after 2 μL drug infusion.
2018Co-Authors: Ying Huo, Yaohua Zhang, Huifen Guo, Yingjuan Liu, Qi Fang, Jianxu ZhangAbstract:Duration of the investigation of sexually naive Tph2−/− female mice to the Urine Odor of male C57BL/6 mice vs. female C57BL/6 mice (estrous) after ICV infusion of (a) ERα agonist and OTR agonist in combination for the drug group and 38% DMSO/ACSF for the control group; (b) OTR agonist singly for the drug group and 35% DMSO/ACSF for the control group; (c) ERα agonist singly for the drug group and 38% DMSO/ACSF for the control group. Paired t-test or Wilcoxon matched-pairs signed-rank test.
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Asian house rats may facilitate their invasive success through suppressing brown rats in chronic interaction
'Springer Science and Business Media LLC', 2017Co-Authors: Hong-ling Guo, Jianxu Zhang, Hua-jing Teng, Jin-hua Zhang, Yaohua ZhangAbstract:Abstract Background The Asian house rat (Rattus tanezumi) and the brown rat (Rattus norvegicus) are closely related species and are partially sympatric in southern China. Over the past 20 years, R. tanezumi has significantly expanded northward in China and partially replaced the native brown rat subspecies, R. n. humiliatus. Although invasive species are often more aggressive than native species, we did not observe interspecific physical aggression between R. tanezumi and R. n. humiliatus. Here, we focused on whether or not R. tanezumi was superior to R. n. humiliatus in terms of nonphysical competition, which is primarily mediated by chemical signals. Results We performed two laboratory experiments to test different paradigms in domesticated R. tanezumi and R. n. humiliatus. In Experiment 1, we caged adult male rats of each species for 2 months in heterospecific or conspecific pairs, partitioned by perforated galvanized iron sheets, allowing exchange of chemical stimuli and ultrasonic vocalization. The sexual attractiveness of male Urine Odor showed a tendency (marginal significance) to increase in R. tanezumi caged with R. n. humiliatus, compared with those in conspecific pairs. Hippocampal glucocorticoid receptor (GR) and brain-derived nutrition factor (BDNF) mRNA were upregulated in R. n. humiliatus and R. tanezumi, respectively, when the rats were caged in heterospecific pairs. In Experiment 2, we kept juvenile male rats in individual cages in rooms with either the same or the different species for 2 months, allowing chemical interaction. The sexual attractiveness of male Urine was significantly enhanced in R. tanezumi, but reduced in R. n. humiliatus by heterospecific cues and mRNA expression of hippocampal GR and BDNF were upregulated by heterospecific cues in R. n. humiliatus and R. tanezumi, respectively. Although not identical, the results from Experiments 1 and 2 were generally consistent. Conclusions The results of both experiments indicate that nonphysical/chronic interspecific stimuli, particularly scent signals, between R. n. humiliatus and R. tanezumi may negatively affect R. n. humiliatus and positively affect R. tanezumi. We infer that chronic interspecific interactions may have contributed to the invasion of R. tanezumi into the range of R. n. humiliatus in natural habitats
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a male pheromone mediated trade off between female preferences for genetic compatibility and sexual attractiveness in rats
Frontiers in Zoology, 2014Co-Authors: Yaohua Zhang, Jianxu ZhangAbstract:Introduction: Chemosensory signals play a vital role in socio-sexual interactions of rodents. Females rely heavily on chemosensory signals to evaluate genetic similarity and quality of potential mates, but their olfactory preferences for these criteria often conflict in mate choice. Results: Using two inbred strains of rats, Brown Norway (BB) and Lewis (LL) and their F1 reciprocal hybrids (BL, BB♀ breed withLL♂ ;L B, LL♀breed withBB♂) as genetic models, we found that the chemosensory preferences of BB and LL females between these 4 strains of rats could be predicted on the basis of genetic compatibility benefits, except that LL females exhibited incestuous preferences for male Urine Odor of LL rats over that of the BB strain and the F1 hybrids. Seven ketone components of major Urine volatiles proved to be potential male pheromones and were enriched in LL males compared to BB males or the F1 hybrid males. We hypothesize that these ketones produced an extravagant male trait that attracts LL females, overriding compatibility traits. This conclusion was corroborated by adding three synthetic pheromone analogues, 4-heptanone, 2-heptanone and 9-hydroxy-2-nonanone of these 7 components, which resulted in equalization of the sexual attractiveness of BB male Urine and LL male Urine. Additionally, in the genetically diverse F2 hybrids (BL♀breed withBL♂), the pheromones-enriched males could consistently attract the F2 females.
Sergej Novikov - One of the best experts on this subject based on the ideXlab platform.
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the genetics of pheromonally mediated intermale aggression in mice current status and prospects of the model
Behavior Genetics, 1993Co-Authors: Sergej NovikovAbstract:A genetic model of pheromonally mediated aggression in laboratory male mice, which has been developed over the past decade, is reviewed and integrated with recent developments in the neurobiology of olfaction and the chemistry of pheromones inMus musculus. Experimental data strongly support the possibility of enzymatic activation of aggression promoting and inhibiting pheromones by beta-glucuronidase (EC 3.2.1.31) These findings introduce important questions as to the involvement of beta-GLU genes (Gus andEg on chromosomes 5 and 8, respectively) in the determination of Urine Odor profiling. The discovery of two neuroanatomically, and functionally distinct, olfactory structures in 1975 led the way for direct selection of olfactory bulb relay neurons, medial amygdala nucleus neurons and TIDA-neurons for analysis of the genetic mechanisms involved in pheromonal action on aggressive and other olfactory mediated social behaviors in rodents.
Kartono A. P. - One of the best experts on this subject based on the ideXlab platform.
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Habitat Preferensial Tarsius Belitung (Cephalopachus Bancanus Saltator Elliot, 1910)
Bogor Agricultural University, 2016Co-Authors: Fitriana F., Prasetyo L. B., Kartono A. P.Abstract:Belitung tarsier (Cephalopachus bancanus saltator) is an endemic species in Belitung Island from Cephalopachus genus. Existence of belitung tarsier in its habitat is now under threatened by deforestatition. Due to lack information about its habitat and as conservation effort, this research was tackled to reveal the characteristic of habitat preference of belitung tarsier. The aim of this study are to identify characteristic of habitat preference of belitung tarsier. This research was conducted in March until May 2016 at around Mount Tajam Protected Forest and plantation area. Presence of tarsiers were identified by direct observation, Urine Odor detection, identifying based tarsier habitat suitability and the local information. Chi-square and Neu methode was used to analyze the variable of habitat preference of belitung tarsiers. This research found that characteristics of habitat preference of belitung tarsier consisted of its homerange was prefer to dry land agricultural and shurb land cover type, not too tight canopy cover (Leaf Area Index /LAI value of 0,83-2,46), close to the edge of forest (0 -874 m), roads (0 – 3.698 m) and settlements (0-403 m), elevation range was between 1 -142 m asl, slope slightly (0-15%), temperature 24-25 0C and high rainfall (3.222 – 3.229 mm/year). Characteristic of habitat preference information could be considered to develop conservation action of belitung tarsier
Kartono, Agus Priyono - One of the best experts on this subject based on the ideXlab platform.
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HABITAT PREFERENSIAL TARSIUS BELITUNG (Cephalopachus bancanus saltator Elliot, 1910)
Deparement of Forest Resources Conservation and Ecotourism - Bogor Agricultural University, 2017Co-Authors: Fitriana Fifin, Prasetyo, Lilik Budi, Kartono, Agus PriyonoAbstract:Belitung tarsier (Cephalopachus bancanus saltator) is an endemic species in Belitung Island from Cephalopachus genus. Existence of belitung tarsier in its habitat is now under threatened by deforestatition. Due to lack information about its habitat and as conservation effort, this research was tackled to reveal the characteristic of habitat preference of belitung tarsier. The aim of this study are to identify characteristic of habitat preference of belitung tarsier. This research was conducted in March until May 2016 at around Mount Tajam Protected Forest and plantation area. Presence of tarsiers were identified by direct observation, Urine Odor detection, identifying based tarsier habitat suitability and the local information. Chi-square and Neu methode was used to analyze the variable of habitat preference of belitung tarsiers. This research found that characteristics of habitat preference of belitung tarsier consisted of its homerange was prefer to dry land agricultural and shurb land cover type, not too tight canopy cover (Leaf Area Index /LAI value of 0,83-2,46), close to the edge of forest (0 -874 m), roads (0 – 3.698 m) and settlements (0-403 m), elevation range was between 1 -142 m asl, slope slightly (0-15%), temperature 24-25 0C and high rainfall (3.222 – 3.229 mm/year). Characteristic of habitat preference information could be considered to develop conservation action of belitung tarsier. Keywords: belitung tarsiers, habitat, habitat preference, tarsier
Yaohua Zhang - One of the best experts on this subject based on the ideXlab platform.
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Duration of the investigation (mean ± SE) of sexually naive Tph2−/− female mice (n control = 7, n drug = 7) to the Urine Odor of male C57BL/6 mice vs. female C57BL/6 mice (estrous) 30 min after 2 μL drug infusion.
2018Co-Authors: Ying Huo, Yaohua Zhang, Huifen Guo, Yingjuan Liu, Qi Fang, Jianxu ZhangAbstract:Duration of the investigation of sexually naive Tph2−/− female mice to the Urine Odor of male C57BL/6 mice vs. female C57BL/6 mice (estrous) after ICV infusion of (a) ERα agonist and OTR agonist in combination for the drug group and 38% DMSO/ACSF for the control group; (b) OTR agonist singly for the drug group and 35% DMSO/ACSF for the control group; (c) ERα agonist singly for the drug group and 38% DMSO/ACSF for the control group. Paired t-test or Wilcoxon matched-pairs signed-rank test.
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Asian house rats may facilitate their invasive success through suppressing brown rats in chronic interaction
'Springer Science and Business Media LLC', 2017Co-Authors: Hong-ling Guo, Jianxu Zhang, Hua-jing Teng, Jin-hua Zhang, Yaohua ZhangAbstract:Abstract Background The Asian house rat (Rattus tanezumi) and the brown rat (Rattus norvegicus) are closely related species and are partially sympatric in southern China. Over the past 20 years, R. tanezumi has significantly expanded northward in China and partially replaced the native brown rat subspecies, R. n. humiliatus. Although invasive species are often more aggressive than native species, we did not observe interspecific physical aggression between R. tanezumi and R. n. humiliatus. Here, we focused on whether or not R. tanezumi was superior to R. n. humiliatus in terms of nonphysical competition, which is primarily mediated by chemical signals. Results We performed two laboratory experiments to test different paradigms in domesticated R. tanezumi and R. n. humiliatus. In Experiment 1, we caged adult male rats of each species for 2 months in heterospecific or conspecific pairs, partitioned by perforated galvanized iron sheets, allowing exchange of chemical stimuli and ultrasonic vocalization. The sexual attractiveness of male Urine Odor showed a tendency (marginal significance) to increase in R. tanezumi caged with R. n. humiliatus, compared with those in conspecific pairs. Hippocampal glucocorticoid receptor (GR) and brain-derived nutrition factor (BDNF) mRNA were upregulated in R. n. humiliatus and R. tanezumi, respectively, when the rats were caged in heterospecific pairs. In Experiment 2, we kept juvenile male rats in individual cages in rooms with either the same or the different species for 2 months, allowing chemical interaction. The sexual attractiveness of male Urine was significantly enhanced in R. tanezumi, but reduced in R. n. humiliatus by heterospecific cues and mRNA expression of hippocampal GR and BDNF were upregulated by heterospecific cues in R. n. humiliatus and R. tanezumi, respectively. Although not identical, the results from Experiments 1 and 2 were generally consistent. Conclusions The results of both experiments indicate that nonphysical/chronic interspecific stimuli, particularly scent signals, between R. n. humiliatus and R. tanezumi may negatively affect R. n. humiliatus and positively affect R. tanezumi. We infer that chronic interspecific interactions may have contributed to the invasion of R. tanezumi into the range of R. n. humiliatus in natural habitats
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a male pheromone mediated trade off between female preferences for genetic compatibility and sexual attractiveness in rats
Frontiers in Zoology, 2014Co-Authors: Yaohua Zhang, Jianxu ZhangAbstract:Introduction: Chemosensory signals play a vital role in socio-sexual interactions of rodents. Females rely heavily on chemosensory signals to evaluate genetic similarity and quality of potential mates, but their olfactory preferences for these criteria often conflict in mate choice. Results: Using two inbred strains of rats, Brown Norway (BB) and Lewis (LL) and their F1 reciprocal hybrids (BL, BB♀ breed withLL♂ ;L B, LL♀breed withBB♂) as genetic models, we found that the chemosensory preferences of BB and LL females between these 4 strains of rats could be predicted on the basis of genetic compatibility benefits, except that LL females exhibited incestuous preferences for male Urine Odor of LL rats over that of the BB strain and the F1 hybrids. Seven ketone components of major Urine volatiles proved to be potential male pheromones and were enriched in LL males compared to BB males or the F1 hybrid males. We hypothesize that these ketones produced an extravagant male trait that attracts LL females, overriding compatibility traits. This conclusion was corroborated by adding three synthetic pheromone analogues, 4-heptanone, 2-heptanone and 9-hydroxy-2-nonanone of these 7 components, which resulted in equalization of the sexual attractiveness of BB male Urine and LL male Urine. Additionally, in the genetically diverse F2 hybrids (BL♀breed withBL♂), the pheromones-enriched males could consistently attract the F2 females.
