Sex-Related Effects of an Immune Challenge on Growth and Begging Behavior of Barn Swallow Nestlings

Parent-offspring conflicts lead the offspring to evolve reliable signals of individual quality, including parasite burden, which may allow parents to adaptively modulate investment in the progeny. Sex-related variation in offspring reproductive value, however, may entail differential investment in sons and daughters. Here, we experimentally manipulated offspring condition in the barn swallow (Hirundo rustica) by subjecting nestlings to an immune challenge (injection with bacterial lipopolysaccharide, LPS) that simulates a bacterial infection, and assessed the effects on growth, feather quality, expression of morphological (gape coloration) and behavioral (posture) begging displays involved in parent-offspring communication, as well as on food allocation by parents. Compared to sham-injected controls, LPS-treated chicks suffered a depression of body mass and a reduction of palate color saturation. In addition, LPS treatment resulted in lower feather quality, with an increase in the occurrence of fault bars on wing feathers. The color of beak flanges, feather growth and the intensity of postural begging were affected by LPS treatment only in females, suggesting that chicks of either sex are differently susceptible to the immune challenge. However, irrespective of the effects of LPS, parents equally allocated food among control and challenged offspring both under normal food provisioning and after a short period of food deprivation of the chicks. These results indicate that bacterial infection and the associated immune response entail different costs to offspring of either sex, but a decrease in nestling conditions does not affect parental care allocation, possibly because the barn swallow adopts a brood-survival strategy. Finally, we showed that physiological stress induced by pathogens impairs plumage quality, a previously neglected major negative impact of bacterial infection which could severely affect fitness, particularly among long-distance migratory birds

Efektifitas Penerapan Program Penanganan Turnover Karyawan Staf Manajemen PT. BEHAESTEX Group

The purpose of this research are to recognize turnover management program implementation effectiveness of management staffs of PT. BEHAESTEX Group and know the causes aspect the employee who leave out then program that given is the target precise. This research used qualitative method with qualitative descriptive research type. Information digging by in depth interview, observation, and documentation taken from HRD data. Research subjects as 18 respondents obtained from staff employee who already terminated from PT. BEHAESTEX Group since 2010 until 2012 and represented each department. The result of the research indicates that effective turnover management program only one program that is employee training. While three other programs that are induction and orientation, coaching and counseling, building and brainstorming ineffective. The causes are the aim does not appropriate, human resources development qualification as program implementer is lack of competence and inconsistency program implementation. Beside found that the causes aspect which result employee terminated could be classified with work term under two years namely unable to adjustment with corporate culture, high idealism and accepted as civil servant. While work term over two years the causes are injustice pay, superior mind pattern still departmental and career stage is unobvious