scholarly journals Phylogenetic and behavioral differentiation in the canyon treefrog, Hyla arenicolor

2011 ◽  
Author(s):  
Katy E. Klymus
Keyword(s):  
Behavioral Differentiation ◽  
Hyla Arenicolor ◽  
Canyon Treefrog

scholarly journals The diversity of Leadership roles in the context of behavioral complexity theory and its impact on leadership effectiveness

2018 ◽  
Vol 2 (2) ◽  
pp. 255-294
Author(s):  
Saleh Abdul Rida Rashid ◽  
Amer Ali Hussein Al Atawi ◽  
Saddam Kadhim Al Khozai
Keyword(s):  
Structural Equation ◽  
Leadership Effectiveness ◽  
Hypothesis Test ◽  
Two Dimensions ◽  
Equation Modeling ◽  
Leadership Roles ◽  
Behavioral Repertoire ◽  
Behavioral Complexity ◽  
Behavioral Differentiation ◽  
The University

This research aims to examine the nature of the relationship between the various leadership roles and the effectiveness of leadership according to the perspective of the theory of behavioral complexity. The faculty at the University of Qadisiyahwas selected to test the hypotheses of research and to verify the objectives. The authors distributed the questionnaire to a sample of (165)individualsworking at different faculties of the university. The behavioral complexity variable consists of two dimensions, behavioral repertoire and behavioral differentiation. The variable of leadership effectiveness is treated asa single dimension variable. The study hypothesized that there is a positive relationship between the behavioral complexity and leadership effectiveness ,In other words , the educational leaders who use a variety of different roles will achieve the highest level of effectiveness. A variety of statistical tools were used to present the statistical description and hypothesis test, namely mean, standard deviation, simple correlation coefficient,andconfirmatory factor analysis , and structural equation modeling. The results reflected the validity of the research hypotheses , and in light of that a set of conclusions and recommendations were formulated

Light intensity as a factor in the choice of an oviposition site by Drosophila pseudoobscura and Drosophila persimilis

1983 ◽  
Vol 25 (4) ◽  
pp. 370-377 ◽  
Author(s):  
Dennis J. Wogaman ◽  
Marvin B. Seiger
Keyword(s):  
Light Intensity ◽  
Genetic Variability ◽  
Sibling Species ◽  
Light Response ◽  
Drosophila Pseudoobscura ◽  
Isofemale Lines ◽  
Sympatric Populations ◽  
Allopatric Populations ◽  
Behavioral Differentiation ◽  
Drosophila Persimilis

Light preferences for ovipositing of the sibling species Drosophila pseudoobscura and D. persimilis were measured in a multichoice chamber. Behavioral differentiation was found among sympatric populations of D. pseudoobscura and D. persimilis and between allopatric populations of D. pseudoobscura. Differences among isofemale lines within populations indicated genetic variability for the behavior. Both D. pseudoobscura populations were less fecund in a uniform light environment than in the multichoice environment while D. persimilis showed no difference in fecundity in the two environments. The patterns for general photoresponse and ovipositional light response were shown to be different for each population. Thus, the motivation to oviposit may affect photopreference differentially in each population.

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