Description of the Study

Smithers Viscient, in collaboration with and Rice University is embarking on 
a second year of collecting  samples of Norway rats (a.k.a. gray- or brown-
rats, Rattus norvegicus); roof rats (a.k.a. black rats, R. rattus); and 
house mice (Mus muscus) from select cities in the United States.   Specimens 
must be of these species only.  The rat samples may consist of the tails, so 
long as the collector/trapper is absolutely certain of the species identity.  
Otherwise the sample will consist of the whole body.  In all cases the mouse 
samples will consist of whole bodies.  Field personnel will be paid $50 for 
each properly documented, correctly identified sample in good condition.   
Generally if an animal is put in a freezer within 48 hours of its death it 
will be in good enough condition for the study.  Additionally if the tail on 
a carcass is still rubbery, then that sample is probably good enough for the 
study.

Below is a list of cities from which we would like samples.  However, almost 
any city with a population of approximately 200,000 or more is acceptable. 
The cities marked with and “X” on the list are high priority cities.  
Coastal cities are also high priority.  Samples can also come from any 
suburb contiguous with a city meeting the above criteria.  

IF YOU ARE UNSURE ABOUT YOUR LOCATION, EMAIL THE PROJECT COORDINATOR LISTED 
BELOW.

The emphasis is on collecting rats and in getting samples from across the 
nation.  With that in mind, no more than 15 rats and/or 10 mice should be 
collected from any one city.  Our goal is to obtain 500 specimens for 
genetic analysis to verify the genetic characteristics of those animals 
which have become resistant to first generation anti-coagulant rodenticides.  
When we reach our goal of 500 specimens, you will be notified and at that 
point you can stop trapping. 

The Team

Smithers Viscient, LLC (www. smitherviscient.com) is managing the field 
operations.   Smithers is an ecotoxicology firm with research facilities in 
Massachusetts and North Carolina Andrew Rupiper will represent Smithers 
Viscient for this study.  Andrew is serving as a logistical coordinator for 
the specimen collections. He is a field biologist from the Des Moines, Iowa 
area, and has prior experience trapping rats and mice. Andrew will be your 
main contacts for the study.  

Responsibilities of the Field Personnel

If you are selected to be a trapper for the study, you will be considered an 
independent consultant and paid, by Smithers Viscient for each specimen you 
collect.  We can provide references of individuals who trapped for us in 
2012-2013.  Your main responsibilities will be to 1) trap target species, 2) 
keep accurate records, 3) label specimens, 4) store samples in a freezer 
until they are ready to be shipped, and 5) pack and ship samples by UPS.  We 
will send you labeling, storing and shipping supplies.  However you will 
need to supply your own traps and pay your own mileage expenses.  Although 
you won’t be reimbursed for mileage and other incidentals, Smithers Viscient 
will supply shipping containers and pay the UPS fees for shipping samples to 
the Smithers Viscient Carolina Research Center where specimens will be 
logged, verified to species and then transferred to Rice University. In 
some cases you may be asked to send digital or hard copy photos of the rat 
from which a tail was taken.

We recommend you be as opportunistic as possible.  For example, trap rats 
and mice in your neighborhood that you’d want to get rid of anyway.  Use 
inexpensive snap traps (unless you have pets that make using the more 
expensive traps a safer option).   Ask RELIABLE friends and family members 
to volunteer to help you.  Point out to them that every time they provide a 
rodent to you, they have one less pest to contend with.   Use inexpensive 
bait.  House mice usually prefer cheap oatmeal mixed with peanut butter, 
over more expensive bait such as cheese.  Most rats love pizza.  
Unfortunately they seem to ignore any pizza more than one day old.  
Fortunately they’re omnivores and will eat a wide variety of grains, seeds, 
and other relatively inexpensive foods. By being opportunistic, you should 
be able to make a profit at $50 per individual rat or mouse. 

How to Get Involved

If you are interested in trapping rats and/or mice for our study, please 
send Andrew an email with your contact information and one or two paragraphs 
describing your qualifications/interests.  If you are selected to help, 
Andrew will have Smithers Viscient send you supplies for labeling, storing 
and shipping samples.  You will also receive a set of instructions providing 
information on how to identify our target species and how to process them 
for shipping.   In addition you will receive some hints on how to trap the 
target species. $50/SPECIMEN WILL BE PAID TO THE FIRST PROPERLY IDENTIFIED 
RATS/MICE FROM A GIVEN CITY. Please email with any questions. 



Andrew Rupiper
Field Logistics Coordinator

[email protected]

Reply via email to