The Adaptation Of Delayed Plumage Maturation In Male Hodgsonius Phaenicuroides

From May to June 2008,I studied the Delayed plumage maturation(DPM) of Hodgsonius phaenicuroides in Lianhua Mountains National Natural Reserve,Gansu Province, P.R.China.By comparing 26 usage samples and 11 contrastive samples on 15 habitat factors via Mann-Whitney-U test,the result indicate that the differences between usage samples and 11 contrastive samples samples of H.phaenicuroides on 13 habitat factors are significant. This species tend to select the habitat with higher slope,shorter distances from water and road, thicker grass coverage,thinner lichen coverage,fewer arbor numbers and species,lower arbor average height,smaller arbor average breast diameter,more shrub numbers and shrub species and higher shrub average height.By comparing after second-year male(ASY) and second-year male(SY) on 15 habitat factors via Mann-Whitney-U,the result indicates that significant difference only occurs on the canopy,and ASY prefers to select more density canopy habitat.Others habitat factors have no significant difference.This result support FMH and SSH.I enter the 13 habitat factors with significant difference in the comparison of usage samples and contrastive samples into binary logistic regression for model analysis,the result indicates that all of the 13 habitat factors are introduced into regression equation and with significant different in the significant test of every parameter.Every individual's these 13 habitat factors are put into this.model,and then the value of this individual's habitat quality is produced.At last,we compare the values of habitat equality between SY and ASY by Mann-Whitney-U test The result indicates that there is no significant difference between the habitat equality between SY and ASY.This result supports the FMH and SSH.Spearman rank correlation analysis is conducted to test the correlation between habitat quality of SY and the three plumage indexes,the result indicates that the habitat quality of SY have no correlation with the plumage proportion of ASY colors.This result supports the CH, RIH,and WAH.The Mann-Whitney-U test is conduct to test the distance of SY to nearest ASY and SY, and the difference between ASY neighbor numbers of SY and SY neighbor numbers of SY. The result indicates that SY's distance to ASY is significantly shorter that the SY's to SY,and SY has more ASY neighbors than SY.This result supports the FMH and SSHThe three plumage indexes are paired with distances of SY to nearest ASY and SY respectively to conduct Curve Estimation for stimulating the models.The result indicates that as SY's plumage proportion of ASY colors increasing,the nearest distance of SY to SY becomes shorter and shorter.Similarly,the three plumage indexes are paired with SY and ASY neighbor numbers of SY respectively to conduct Curve Estimation for stimulating the models.The result indicates that as SY's plumage proportion of ASY colors increasing,SY has more and more SY neighbors.Both of the two points support FMH,but contradict with the SSH.At last,13 song characters of 9 ASYs and 6 SYs are tested by Independent-samples t test, the result indicates that all of the 13 song characters do not show significant discrepancy between ASY and SY.This result can support the CH,RIH,and WAH.In sum,this research about the habitat equality and territory distribution of H. phaenicuroides indicates that FMH and its prediction can well explain the adaptive significance habitat equality and territory distribution.