Jessica F. Stephenson
School of Biosciences
Cardiff University
Cardiff, United Kingdom
E-mail: [email protected]

Cock van Oosterhout
School of Environmental Sciences
Cardiff University
Cardiff, United Kingdom

Ryan S. Mohammed
Department of Life Sciences
The University of the West Indies
St. Augustine, Trinidad and Tobago
E-mail: [email protected]

Joanne Cable
School of Biosciences
Cardiff University
Cardiff, United Kingdom

Trini_data_analysis.R (MD5: 99b589044060d4c16baba6fc32d8781d)    This is an R script file containing the code for the analysis presented in the paper.

Trini_data.csv (MD5: be7932bc511ace2a80c82e84324e42d0)    This is a .csv file containing all of the data used in the analysis presented in the paper. Below is a table explaining what each of the columns refers to.

Column Heading	Description
drainage	The name of the drainage
course	The section of the river: Upper, Mid, Lower or the Pitch Lake ('Lake').
river	The name of the river.
site	The number of the site (nested in course, nested in river, nested in drainage)
year	The year of the sample
class	Host class – male, female or juvenile
wgt	Fish weight (g)
gyro	Gyrodactylus spp. count
presG	Presence/absence of Gyrodactylus
richness.w.gyro	Number of symbiont taxa present on that fish, including Gyrodactylus spp.
richness.no.gyro	Number of symbiont taxa present on that fish, excluding Gyrodactylus spp.
prestrich	Presence/absence of Trichodina spp.
presWS	Presence/absence of white spot, Ichthyophthirius spp.
presApio	Presence/absence of Apiosoma spp.
presfung	Presence/absence of fungal infection
presDig	Presence/absence of digenean metacercariae
presCN	Presence/absence of Camallanus spp.