Cindy Breau

PhD candidate, CRI, University of New Brunswick

breau 

Contact information

Email Cindy 

Education

M.Sc. Biology, Specialization Ecology, Concordia University, Montreal.
B.Sc. Biology, Specialization Ecology, Concordia University, Montreal

Research

Supervisor: Dr. Rick Cunjak
Started January 2003

The effects of high water temperatures on the ecophysiology and the behaviour of juvenile Atlantic salmon (Salmo salar).

Salmonid rivers are more commonly experiencing temperatures (24-26ºC) that are potentially lethal for coolwater fishes.  During high temperatures, salmon parr abandon territorial behaviour and aggregate at cool water sources (e.g. springs and confluence of cooler brooks).  However, the physiological mechanisms and the ecological consequences of juvenile salmonid aggregations are not well understood.  During the next few years, I will be examining the potential causes and consequences of salmonid aggregations during thermal stress.  To address these questions, I will combine laboratory experiments and field observations of wild juvenile Atlantic salmon.  Why do juvenile salmon abandon territorial behaviour at high temperatures.  Measurement of various physiological parameters such as muscle lactate will enable me to assess possible causes related to the behavioural changes observed.  In the Little Southwest Miramichi River, individual salmon will be tagged using PIT technology.  Both stationary and portable antennae will allow me to track the movement and the behaviour of tagged fish.  I will be able to determine how far fish travel to find cool water sources.  When do aggregations form and breakdown?

Publications

Leduc AOHC, E Roh, C Breau, and GE Brown. 2007. Learned recognition of a novel odour by wild juvenile Atlantic salmon, Salmo salar, under fully natural conditions. Anim. Behav. 73(3): 471-477.

Breau C, LK Weir, and JWA Grant. 2007. Individual variability in activity patterns of juvenile Atlantic salmon (Salmo salar) in Catamaran Brook, New Brunswick. Can. J. Fish. Aquat. Sci. 64: 496-494.

Grant JWA, IL Girard, C Breau, and LK Weir. 2002. Influence of food abundance on competitive aggression in juvenile convict cichlids. Anim. Behav. 63: 323-330.

Breau, C, and JWA Grant. 2002. Manipulating territory size via vegetation structure: optimal size of area guarded by the convict cichlid (Pisces, Cichlidae). Can. J. Zool. 80: 376-380.

Presentations

Breau C, SJ Peake, and RA Cunjak. Behaviour at high water temperatures: can physiology explain movement of juvenile Atlantic salmon (Salmo salar) to cool water? Oral presentation at the International Fish Congress. Jul. 16-22, 2006. St-John’s, Newfoundland.

Breau C, and RA Cunjak. High water temperatures: movements and physiology of juvenile Atlantic salmon (Salmo salar). Oral presentation at the Atlantic Canada Coastal and Estuarine Science Society (ACCESS). May 16-18, 2006. Fredericton, New Brunswick.

Breau C, and RA Cunjak. The aggregation patterns of juvenile Atlantic salmon (Salmo salar) in the confluence of Catamaran Brook, New Brunswick, during high water temperature. Oral presentation at the Canadian Conference for Fisheries Research. Jan. 2005, Windsor, Ontario.

Breau, C, and JWA Grant. Manipulating territory size via vegetation structure: Optimal size of area guarded by the convict cichlid (Pisces, Cichlidae). Poster presentation at the 9th Bienniel Congress of the International Society for Behavioral Ecology. Jul. 2002, Montréal, Québec.

Breau, C, and JWA Grant. Manipulating territory size via vegetation structure: Optimal size of area guarded by the convict cichlid (Pisces, Cichlidae). Poster presentation at the Canadian Conference for Fisheries Research. Jan. 2001, Toronto, Ontario.