15.-18. August 2001 Reykjavík, Iceland

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Voluntary Food Intake In Fish
15.-18. August 2001 Reykjavík, Iceland

Programme

AUGUST 15th:

Arrival of participants

16:00-20:00 Registration and poster positioning at Oddi,
University of Iceland

AUGUST 16th:

9:00 Opening remarks: Árni M. Mathiesen, Minister of Fisheries

Session I: Methods, models and techniques

Chairperson: Eva Brännäs

9:15 Invited speaker: Discovering complex repeated patterns in behavior and effects of experimental factors.
Magnús. S. Magnússon - Human Behavior Laboratory, University of Iceland.

10:00 Measuring feed intake with chemical markers and X-ray methods. O. Gudmundsson. Feed, Seed and Fertilizer Inspectorate, Iceland.

10:20 Monitoring the triggering activity of individual fish with a self-feeding system. Preliminary results in European sea bass, Dicentrarchus labrax.
D. Covès. IFREMER, France.

10:40 Coffee Break

Chairperson: Skúli Skúlason

11:00 The pulse dose marker method in fish nutrition research.
H.R. Kristiansen, Aqualife, Denmark.

11:20 In vitro digestibility based on trypsin activity of fish crude enzyme extract could predict feed quality in growth trial. K. Rungruangsak-Torrissen,
Aquaculture Research Station, Matredal, Norway.

Session Environmental quality, requirements and II influences

11:40 Invited speaker: How feed intake in fish is modulated by water quality.
Jeannine Person, IFREMER, Centre de Brest, Laboratoire de Physiologie des Poissons, France.

12:25 Genetic and environmental effects on the growth of three stocks of Arctic charr, Salvelinu alpinus. H. Thorarensen, Holar Agricultural College, Iceland.

12:45 Lunch

Chairperson: Emma Eythórsdóttir

14:00 Genetics and environmental effects on the size of the cardio-respiratory organs in Arctic charr, (Salvelinus alpinus). M.Á.M. Ruiz, Holar Agricultural College, Iceland.

14:20 Parallel sympatric segregation in arctic charr and threespined stickleback in Lake Galtarból, Iceland. B. Jónsson, Institute of Freshwater Fisheries at Hólar, Iceland.

14:40 Dietary and morphological divergence of Icelandic threespine stickleback, Gasterosteus aculeatus L., towards mud and lava substrate in lakes. B.K. Kristjánsson, Holar Agricultural College, Iceland.

15:00 Coffee Break

Chairperson: Malcolm Jobling

15:20 Feed delivery rate in rainbow trout, Oncorhynchus mykiss, production.
J. Bailey, Swedish University of Agricultural Sciences, Umeå, Sweden.

15:40 Feed intake in relation to workload and diet composition. J. Pickova,
Swedish University of Agricultural Sciences, Umeå, Sweden.

16:00 Culture conditions and spatial distribution: swimming patterns under high density in recirculating tanks around self-feeding events. M.L. Bégout Anras,
Centre de Recherche en Ecologie Marine et Aquaculture, IFREMER, L'Houmeau, France.

16:20 Solea senegalensis production in mono and policulture fish ponds of Sado Estuary. M. A. Ramos, IPIMAR, Lisboa Portugal.

18:00 Reception by courtesy of the Mayor of Reykjavik in Reykjavík City Hall.

AUGUST 17th:

Session Competition and cannibalism III

Chairperson: Marilyn Beauchaud

9:00 Invited speaker: Cannibalism in cultured fishes: Why eating conspecifics, what can we learn from it and how can we mitigate it? Etienne Baras, University of Liège, Dept Ethology and Animal Psychology, Tihange Aquaculture Station, Belgium.

9:45 Influence of feeding frequency on feed intake and size distribution in groups of Arctic charr, Salvelinus alpinus. T. E. Pétursdóttir, Agricultural Research Institute, RALA, Iceland.

10:05 The effect of feeding on aggressive behaviour and growth in juvenile rainbow trout, Oncorhynchus mykiss. D.L.G. Noakes, Department of Zoology, and Aquaculture Research Centre, University of Guelph, Ontario, Canada.

10:25 Coffee Break

Chairperson: Kari Ruohonen

10:45 Intracohort cannibalism: a time lagged lifeboat mechanism.
P. Byström, Swedish University of Agricultural Science, Sweden.

11:05 Behavioural deficits in farmed brown trout, Salmo trutta. A. Alanärä,
Swedish University of Agricultural Sciences, Umeå, Sweden.

11:25 Patterns of feeding and social interactions in cages of Gilthead Sea Bream, Sparus aurata, European Sea Bass, Dicentrarchus labrax, and Atlantic Salmon, Salmo salar. S. Kadri, Institute of Biomedical & Life Sciences,
University of Glasgow, Scotland.

11:45 Effects of dietary L-tryptophan on agonistic behaviour and stress responses in juvenile rainbow trout. S. Winberg, Dept. Comparative Physiology, Uppsala University, Sweden.

12:05 Lunch

13:00-14:00: Poster session with authors present

Session Physiological signalling and intergration IV

Chairperson: Marie-Laure Bégout-Anras

14:00 Invited speaker: Stressful environments and food assimilation: Gut blood flow and gut feelings. Anthony P. Farrell, Department of Biological Sciences,
Simon Fraser University Burnaby, Canada.

14:45 Growth hormone, growth, behaviour and ecological consequences in salmonids. B.T. Björnsson, Göteborg University, Sweden.

15:05 Coffee Break

Chairperson: Thórarinn Sveinsson

15:25 Food intake and the neuropeptide Y system of juvenile rainbow trout.
E.T. Larson, Uppsala University, Sweden.

15:45 Adiposity and growth of post-smolt Atlantic salmon, Salmo salar.
M. Jobling, University of Tromsø, Norway.

16:05 Lipostatic regulation of voluntary feed intake in fish. S.J.S. Johansen,
University of Tromsø, Norway.

16:30 Bush trip to the Blue Lagoon (ca. 3 hours).

20:00 Reception by courtesy of the Minister of Fisheries
Light meal and refreshments


AUGUST 18th:

Chairperson: Dimitra Maragoudaki

9:00 Macronutrient self-selection in European sea bass using macroencapsulated nutrients. V.C. Rubio, University of Murcia, Spain.

9:20 Regulation of food and nutrient intake in rainbow trout, Oncorhynchus mykiss, fed dry pelleted diets. D.J. Grove, University of Wales Bangor, Wales, U.K.

9:40 Effect of energy density and source on voluntary food intake in rainbow trout. I. Geurden, Unité mixte INRA-IFREMER de Nutrition des Poissons,
St Pée-sur-Nivelle, France.

10:00 Feed intake in relation to temperature and diet composition in Atlantic salmon parr. E.Å. Bendiksen, BioMar AS, Norway.

10:20 Coffee Break

Session Feeding strategies and tactics V

Chairperson: Henrik Rosendahl Kristiansen

10:40 Invited speaker: Strategical and tactical analyses of the feeding behaviour of fish (and Icelanders). Lawrence M. Dill, Behavioural Ecology Research Group, Dept. of Biological Sciences, Simon Fraser University Burnaby, Canada.

11:25 Dynamics of appetite in teleosts experiencing cycles of feed deprivation.
R.J. Wootton, University of Wales, Aberystwyth, Wales, U.K.

11:45 Contrasting results from efforts to elicit growth over-compensation in two fishes. R.S. Hayward, University of Missouri-Columbia, USA.

12:05 Lunch

13:00-14:00 Poster session, cont.

Session Feeding strategies and tactics V Continued

Chairperson: Soffía Vala Tryggvadóttir

14:00 Enhanced feeding activity: a correlated response to selection for growth in brown trout, Salmo trutta. M. Mambrini, Laboratoire de Génétique des Poissons, INRA, France.

14:20 Triggering activity rhythm of individual fish versus food intake activity of a population. M. Beauchaud, Université J. Monnet. Faculté des Sciences. Saint - Etienne, France.

14:40 Comparison of demand-feeding rhythms in individual and grouping rainbow trout: with emphasis on inter-individual social interactions.
W.M. Chen, Teikyo University of Science and Technology, Japan.

15:00 Coffee Break

Chairperson: Ólafur Gudmundsson

15:20 Feeding rythms and macronutrient self-selection in a plantivorous marine species: sharpsnout sea bream, Diplodus puntazzo. J.A. Madrid, Dep. Physiology. Murcia University, Spain.

15:40 Food anticipatory activity in greenback flounder. J. Purser,
University of Tasmania, Launceston, Tasmania, Australia.

16:00 Closing remarks from the chairman of the management committee:
Thierry Bouchard

19:30 Banquet at Viðeyjarstofa on Viðey in the Harbor of Reykjavík. The ferry leaves from Klettagarðar, Sundahöfn at 19:30. - Coctail by courtesy of the Minister of Agriculture.

AUGUST 19-20th
Field trip to the aquaculture research stations in the north. (Halibut, Seabass and Arctic charr research farms)

 

HOSTS:       University of Iceland - The Agricultural Research Institute -  Hólaskóli