THE DEACON LAB
BIODIVERSITY & BEHAVIOUR
BioTIME River Surveys
In July 2018 we began to make return visits to the 16 sites that were surveyed regularly between 2010-2016, to add to this valuable long term data set.
These surveys involve:
1) Seining and electrofishing each 50 m stretch of river for fish (which are released unharmed after identification and weighing)
2) Taking benthic fauna samples
3) Recording a variety of habitat characteristics
The 2018 team included MSc student James Josaphat, who used some of the data as part of his thesis research, alongside experienced UWI field technicians Raj and Kharran.
So far we are already noticing startling differences in the physical nature of some of our sites since the last surveys years ago...will be interesting to see if these are reflected in the assemblages they support!
This semi-naturalistic experiment is part of a project we are conducting in collaboration with Dr Doug Fraser (Siena College).
We are interested to see how the presence of heterospecifics affects the colonisation ability of guppies.
In this case the heterospecific we are using is a native killifish (Aneblepsoides hartii, formally known as Rivulus hartii).
This experiment uses large garden containers as mesocosms (see right) and is based at the William Beebe Tropical Research Station (Simla) in the beautiful Arima Valley of Trinidad.