Data IGP

These data were collected during an intraguild predation (IGP) experiment using aggressive and docile individuals of the damsel bug, Nabis americoferus. The obejctive was to understand the role of aggressiveness within IGP interactionThis experiment included two other species, Lygus lineolaris as the extraguild prey and Orius insidiosus as the intraguild prey.The experiment included two types of response variables: the number of attacks by N. americoferus toward O. insidiosus and the mortality of both O. insidiosus and L. lineolaris.The two explanatory variables are the behavioral type of N. americoferus (i.e., aggressive or docile line) and the presence or absence of extraguild prey.Description of the Data and file structureThe data is divided into 5 columns: nabis, resources, totalattack, oriusdead and lygusdead.- Nabis : corresponds to the type of Nabis used, i.e. aggressive, docile or the absence of the latter for the control treatment.- Resources : corresponds to the presence or absence of extra-guild prey. If there is no extra-guilded prey, it is written none, if it is present, it is written lygus.- Totalattack : corresponds to the number of attacks made by Nabis on Orius within 15 minutes of the start of the experiment.- Oriusdead : corresponds to the number of prey intrgauildes found after 24 hours.- Lygusdead : corresponds to the number of extra-guild prey found dead after 24 hours.Results were analyzed with R software using a generalized linear model (GLM) following a binomial distribution for IGP because the mortality rate was constrained between zero and five for L. lineolaris and zero and three for O. insidiosus.Therefore, to fit with a binomial distribution, this part of the dataset has been transformed by dividing the number of dead O. insidiosus by three and the number of dead L. linerolaris by five. Following the transformation, the dataset of the IGP was ranged between 0 and 1.As the attack rate had no constrained values, it was analyzed with GLM model for Poisson distributed data. For every models, an interaction was used between the two explanatory variables (i.e. columns nabis and ressrouces).