Visiting Researchers

The following is a list of known researchers who have visited the Canadian Rivers Institute:

Richard Doucett

Life histories and feeding ecology of salmonid fishes and aquatic invertebrates.

Dr. Doucett used stable-isotope analysis (SIA) to understand the life history and feeding ecology of salmonid fishes and aquatic invertebrates. Specific project objectives included: establishing diet-tissue isotopic fractionation and turnover times in juvenile salmon, assessing the relative importance of egg-predation to the diet of precocious parr and identifying anadromy in adult brook trout and their young-of-the-year progeny. Phoresy and parasitism were distinguished in commensal chironomids using SIA. In addition, the utility of SIA to differentiate between aquaculture escapees and wild Atlantic salmon was determined.

Douglas Peterson, PhD.

Biologist with the US Fish and Wildlife Service, Helena, Montana

CRI Visiting Professor 2007

Dr. Gaspar González-Sansón

Center of Marine Research
University of La Habana, CUBA
Calle 16 No. 114, Miramar, Ciudad de la Habana
Tel: (537) 203 06 17

Dr. González-Sansón’s Research:

Natural and anthropogenic factors influencing fish assemblages composition in coral reefs, with special attention to habitat connectivity during the life cycles of selected species. He plans to apply simultaneously several complementary methods for the research of connectivity processes. Main methods include visual census techniques, catches using experimental gears, stable isotopes (C & N), otolith microchemistry and tagging experiments using traditional (external anchor tags) and acoustic telemetric methods. He is working also in effects-based assessment of freshwater and marine ecosystems using fishes as bioindicators.

Dr. Gaspar Gonzalez

CRI Visiting Researcher 2005, 2007

Dr. Consuelo Aguilar Betancourt

Senior Researcher
Center of Marine Research
University of La Habana, CUBA
Calle 16 No. 114, Miramar, Ciudad de la Habana
Tel: (537) 203 06 17

Dr. Aguilar Betancourt’s Research:

Effects-based assessment of freshwater and marine ecosystems using fishes as bioindicators at several levels of organization (individual, population, community). Current research is focused in the impact of Havana City pollution sources on fringe reefs and Almendares river. She plans to develop a research protocol which can be applied in other Cuban coastal areas and rivers. She also investigates natural and anthropogenic factors influencing fish assemblages composition in coral reefs, with special attention to
habitat connectivity during the life cycles of selected species. Dr. Coqui Aguilar

CRI Visiting Professor 2005, 2006

Dr. Shin Hyeon-Ok

Dept. of Marine Production Management
Pukyong National University
599-1 Daeyeon-dong, Nam-gu, Busan 608-737, Korea
Tel: 051-620-6125; Fax: 051-622-3306

Dr. Shin’s Research:

Analysis on the movement of bag-net in set-net by Telemetry Techniques

The authors reconstructed a mooring type underwater positioning system to measure the latitudinal movement of a bag-net in a set-net by the telemetry techniques with five transponders. The field experiments were carried out in Jaran Bay, Kosung, Korea on October 6, 2000 (neap tide) and November 28, 2000. The longitudinal movement range, the latitudinal one and the vertical one of the bag-net at the neap tide were 3.2 m, 3.4 m and 2.1 m, respectively.

At the spring tide, these variations were 7.8 m, 7.8 m and 5.0 m, respectively. The vertical oscillation range at the bottom of the bag-net near the point of the  slope net, at the middle part and at the far point from the slope net were 3.2 m, 3.7 m and 8.4 m, respectively. The depth of the bottom net was decreased and its vertical oscillation appeared frequently when the current speed was more than 10 cm/s and the current direction was significantly different from the longitudinal axis of the bag-net.

The variation of hydrophone coordinates measured by the transponder fixed on the sea bed presents that hydrophones equipped to the frame line of the set-net could be moved within several meters due to the tidal current. This fact indicates that the compensation of hydrophone coordinates is necessary to reduce the measuring errors. The underwater position fixing errors of x-axis, y-axis and z-axis of the system measured in the cage of aquaculture were 0.6 m, 0.8 m and 1.2 m, respectively. Also, the errors of the transponders that were close to the baselines or placed in the baselines were smaller than those in other position.

CRI Visiting Professor 2006

Dr. Fabiana Laura Lo Nostro

CONICET & Laboratorio de Embriología Animal, Depto. de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires.
Ciudad Universitaria, Pabellón 2, 4to piso, No. 3. (C1428EHA). Ciudad
Autónoma de Buenos Aires, Argentina.
TE: 0054 11 4576 3300, ext. 258
FAX: 0054 11 4576 3384

Dr. Lo Nostro's Research:

Effects assessment of the exposure to organochlorine pesticides on freshwater fish (larvae and adults) using different biomarkers. Current research is focused on periodically monitoring several water bodies in Argentina, on which the use of agricultural chemicals in nearby land is common. Biomarkers analyzed focus mainly on the reproductive physiology of fish, including the expression of vitelogenin, gonadotrophins and steroidogenic enzymes. Research includes field and laboratory work as immunohistochemistry, morphological and histological techniques and also in vivo and in vitro experiments using a native species to validate thebiomarkers and develop new ones.

Visiting Post-Doc 2006

Dr. Rodrigo Orrego

Fuentealba Post Doctoral Fellowship Program (Aquatic Toxicology)
Ministry of Research and Innovation (MRI). Ontario, Canada
Faculty of Science
University of Ontario Institute of Technology
2000 Simcoe St. North
Oshawa, Ontario. Canada L1H-7K4
Phone: 905-721-8668  ext. 2941
Fax: 905-721-3304

CRI Visiting Professor 2006

Dr. Ricardo O Barra

Aquatic Systems Research Unit
EULA-Chile Environmental Sciences Centre University of Concepción Barrio
Universitario S/N P.O. Box 160-C Concepción Chile
Tel:56-41-2204002 Fax:56-41-2207076

Dr Barra's Research:

The analysis of exposure and fate of chemicals released by industrial activities, in particular pulp and paper mills. Fate of Persistent Organic Pollutants (POPs) in the aquatic ecosystem in remote and highly anthropized environments. Fish biomarkers as pollution indicators, and the design of monitoring programs using fish indicators at different levels of biological organization.

Dr. Orrego’s Research Molecular, physiological, reproductive, and individual biomarkers to assess environmental pollution exposure in aquatic organism. Use of genomics to assess the endocrine disruption effects in Fish due to pulp and paper mill effluent exposure. Rodrigo was at our laboratory during the spring and summer of 2006 from the Universidad de Concepcion, Chile.

CRI Visiting Professor 2003-2004

Jean-Marc Roussel, PhD.

Research Scientist, INRA, Unité Mixte de Recherche en Ecobiologie et Qualité des Hydrosystèmes Continentaux (UMR EQHC), Laboratoire d’Ecologie Aquatique, France

Jean-Marc visited during the summers of 2003 and 2004, to continue collaborations with CRI established during his postdoctoral fellowship. He provided technical assistance to graduate students and researchers working with passive integrated transponder (PIT) technology, and continued his collaborative salmon research with Dr. Cunjak and other CRI personnel.

CRI Visiting Professor 2003-2007

Stuart Bunn

Director, Centre for Catchment and In-Stream Research
Faculty of Environmental Sciences, Griffith University, Brisbane, Australia
Stuart Bunn came to Canada for several months in 2002 and 2005, to further the development of the river hydraulics and habitat field course. His expertise in stable isotope analysis and riverine production was an invaluable contribution to the students and scientists at the CRI.