Driving forces behind female-female aggression and its fitness consequence in an Asian agamid lizard

Female-female aggression and its effect on fitness are poorly understood compared to male-male aggression. We quantified female-female aggression in the toad-headed agamid lizard, <i>Phrynocephalus vlangalii</i>, and tested two hypotheses, mate limitation hypothesis (females are aggressive when male availability is low) and resource competition hypothesis (females are aggressive when resource availability is low), to explain the driving forces of heightened female-female aggression and its fitness consequence. We established populations in large outdoor enclosures in the field and separately manipulated mate and food availability while quantifying aggressive interactions between known females. Female mass, and offspring quantity and quality, were monitored for two years and used as measurement of female fitness. The dataset aggression_mate_2012.csv is about the mate limitation experiment, the dataset aggression_food_2013.csv is about the resource competition experiment, the dataset female_birth.csv is about female birth probablilty in 2013 and 2014 during recource competition experiment, the dataset female_quality.csv is about female quality in 2013 and 2014 during recource competition experiment, the dataset offspring_growth_survival.csv is about offspring growth and survival in 2013 and 2014 during recource competition experiment, the dataset offspring_quality.csv is about offspring quality in 2013 and 2014 during resource cmpetition experiment.