Sexual selection is thought to play a major role in the evolution of color due to the correlation between a signaler’s physiological state and the displayed color.As such,researchers often investigate how color corre...Sexual selection is thought to play a major role in the evolution of color due to the correlation between a signaler’s physiological state and the displayed color.As such,researchers often investigate how color correlates to the quality of the signaler.However,research on the relationship between color and individual quality is often taxonomically limited and researchers typically investigate how color phenotypes relate to one index of quality,such as a linear measure of body size.Here,we investigated the relationship among body size,claw size,claw muscle mass,lipid content,and the color of the claw in male fiddler crabs(Leptuca uruguayensis)which wield an exaggerated claw that varies in color from brown to red.We hypothesized that if the color was correlated to one or more indices of male quality,the color displayed on the claws of male L.uruguayensis could be under sexual selection.We found L.uruguayensis claw color varies substantially among the individuals we photographed.However,we did not find a correlation between claw color and indices of quality;neither brightness nor hue correlated to the indices of quality we measured.Our findings suggest that claw color in L.uruguayensis is unlikely to have evolved to signal quality,but may instead function as a species identity or as a non-indicator sexual signal.展开更多
Through analyzing the cases of Xiao Zhijun and the Yulin maternal jumping incident,the authors found significant disputes between the requests for non-indicated cesarean section and medical risk prevention,as well as ...Through analyzing the cases of Xiao Zhijun and the Yulin maternal jumping incident,the authors found significant disputes between the requests for non-indicated cesarean section and medical risk prevention,as well as between the psychology of avoiding childbirth pain and surgical responsibility.Currently,based on people’s current awareness and the responsibility orientation of expert opinions in disputes,medical institutions tend to satisfy family members’surgical requirements after fulfilling their obligation to fully inform about risks,to reduce the risk of losing disputes.This phenomenon actually reflects the contradiction between the demands of patients’families and the responsibilities of medical staff in medical decision-making.To balance the responsibilities of medical staff and the demands of patients’families,the authors believe that multiple governance paths need to be constructed:first,optimizing the level of medical staff’s communication;second,strengthening medical risk science popularization relying on modern information technology to improve patients’risk cognition ability;and third,raising society’s correct understanding of cesarean section through multiple channels.These measures can help to enhance patients’trust in hospital diagnosis and treatment results and promote harmonious development of doctor-patient relationships.展开更多
基金funded by Fundacao de Amparoà Pesquisa do Estado de Sao Paulo(process no:2016/22679-3)funded through an undergraduate student scholarship for scientific research provided by Conselho Nacional de Desenvolvimento Científico e Tecnológico(CNPq,process no:144202/2018-2).
文摘Sexual selection is thought to play a major role in the evolution of color due to the correlation between a signaler’s physiological state and the displayed color.As such,researchers often investigate how color correlates to the quality of the signaler.However,research on the relationship between color and individual quality is often taxonomically limited and researchers typically investigate how color phenotypes relate to one index of quality,such as a linear measure of body size.Here,we investigated the relationship among body size,claw size,claw muscle mass,lipid content,and the color of the claw in male fiddler crabs(Leptuca uruguayensis)which wield an exaggerated claw that varies in color from brown to red.We hypothesized that if the color was correlated to one or more indices of male quality,the color displayed on the claws of male L.uruguayensis could be under sexual selection.We found L.uruguayensis claw color varies substantially among the individuals we photographed.However,we did not find a correlation between claw color and indices of quality;neither brightness nor hue correlated to the indices of quality we measured.Our findings suggest that claw color in L.uruguayensis is unlikely to have evolved to signal quality,but may instead function as a species identity or as a non-indicator sexual signal.
文摘Through analyzing the cases of Xiao Zhijun and the Yulin maternal jumping incident,the authors found significant disputes between the requests for non-indicated cesarean section and medical risk prevention,as well as between the psychology of avoiding childbirth pain and surgical responsibility.Currently,based on people’s current awareness and the responsibility orientation of expert opinions in disputes,medical institutions tend to satisfy family members’surgical requirements after fulfilling their obligation to fully inform about risks,to reduce the risk of losing disputes.This phenomenon actually reflects the contradiction between the demands of patients’families and the responsibilities of medical staff in medical decision-making.To balance the responsibilities of medical staff and the demands of patients’families,the authors believe that multiple governance paths need to be constructed:first,optimizing the level of medical staff’s communication;second,strengthening medical risk science popularization relying on modern information technology to improve patients’risk cognition ability;and third,raising society’s correct understanding of cesarean section through multiple channels.These measures can help to enhance patients’trust in hospital diagnosis and treatment results and promote harmonious development of doctor-patient relationships.
