The International Symposium series, "Pollutant Responses in Marine Organisms" began in 1981 with a small group of NSF-funded investigators who were addressing questions related to "Chemical Effects and the Health of the Ocean" at a mechanistic level. The first PRIMO Symposium was held in Plymouth, UK, in 1981 with the goal of stimulating international scientific interactions in this area. The success of the first PRIMO meeting led to a second in 1983 in Woods Hole, USA, and then to biennial meetings held alternately in Europe and the United States. Although the word "marine" was used to produce the memorable acronym, the meeting has never distinguished between, and always has included, marine and freshwater organisms. To date, PRIMO meetings have been held in the following locations:
1981 PRIMO 1 Plymouth, UK
1983 PRIMO 2 Woods Hole, USA
1985 PRIMO 3 Plymouth, UK
1987 PRIMO 4 Woods Hole, USA
1989 PRIMO 5 Plymouth, UK
1991 PRIMO 6 Woods Hole, USA
1993 PRIMO 7 Goteborg, Sweden
1995 PRIMO 8 Asilomar, Monterey, USA
1997 PRIMO 9 Bergen, Norway
1999 PRIMO 10 Williamsburg, USA
2001 PRIMO 11 Plymouth, UK
2003 PRIMO 12 Tampa, Florida, USA
2005 PRIMO 13 Alessandria, ITALY
2007 PRIMO 14 Florianópolis, BRAZIL
