Location

UMass Amherst

Event Website

http://fishpassage.ecs.umass.edu/Conference2012/

Start Date

6-6-2012 2:30 PM

End Date

6-6-2012 2:50 PM

Description

The effects of water temperature and ammonia concentration on swimming capacity of brook charr (Salvelinus fontinalis, Mitchill, 1814) were determined by measuring gait transition speed (Ugt, cm/s), maximum burst speed (Umax, cm/s), tail-beat amplitude (a, cm), tail-beat frequency (f, Hz), maximum acceleration of bursts (Amax, cm/s2), number of bursts, distance of bursts (cm) and total swimming distance (cm) in a 4.5 m long experimental raceway with increasing upstream water velocity. Temperatures other than the acclimation temperature of 15 °C signi!cantly reduced swimming characteristics of gait transition, i.e. Ugt and Amax, while increased ammonia concentration reduced the measures of swimming after Ugt: Umax, the relationship between f and swimming speed above Ugt, a, Amax and the distance travelled with each swimming burst above Ugt. This study, using a novel raceway set-up shows various effects of temperature and ammonia exposure on the swimming performance of brook charr and can be used to establish threshold values for environmental management.

Comments

Dr. Christian Tudorache received his PhD from Antwerp University, Belgium, for his work on the swimming physiology and behaviour of migrating freshwater fish, titled: "Aspects of Swimming Physiology and Behaviour - Consequences for Migrating Fish". He continued his work at the University of New Brunswick, Canada, and at Leiden University, The Netherlands, where he currently studies the enigmatic migration of the European eel.

Share

COinS
 
Jun 6th, 2:30 PM Jun 6th, 2:50 PM

Session B5 - The effect of temperature and ammonia exposure on swimming performance of brook charr (Salvelinus fontinalis)

UMass Amherst

The effects of water temperature and ammonia concentration on swimming capacity of brook charr (Salvelinus fontinalis, Mitchill, 1814) were determined by measuring gait transition speed (Ugt, cm/s), maximum burst speed (Umax, cm/s), tail-beat amplitude (a, cm), tail-beat frequency (f, Hz), maximum acceleration of bursts (Amax, cm/s2), number of bursts, distance of bursts (cm) and total swimming distance (cm) in a 4.5 m long experimental raceway with increasing upstream water velocity. Temperatures other than the acclimation temperature of 15 °C signi!cantly reduced swimming characteristics of gait transition, i.e. Ugt and Amax, while increased ammonia concentration reduced the measures of swimming after Ugt: Umax, the relationship between f and swimming speed above Ugt, a, Amax and the distance travelled with each swimming burst above Ugt. This study, using a novel raceway set-up shows various effects of temperature and ammonia exposure on the swimming performance of brook charr and can be used to establish threshold values for environmental management.

http://scholarworks.umass.edu/fishpassage_conference/2012/June6/27