ALBERT — All Library Books, journals and Electronic Records Telegrafenberg

1

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The effect of meal size on the rate of gastric evacuation of burbot, Lota lota (L.) (1999)

Pääkkönen, J. -P. J. ; Myyrä, R. ; Marjomäki, T. J.

Oxford, UK : Blackwell Publishing Ltd

Ecology of freshwater fish 8 (1999), S. 0

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ISSN: 1600-0633

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Notes: Abstract– The effect of meal size on the gastric evacuation rate of burbot Lota lota (L.), was determined at a constant temperature of 1.5°C. Burbot were fed vendace Coregonus albula (L.), in varying amounts from 1.0% to 12.6% of burbot weight. Although gastric evacuation rate decreased exponentially with increasing meal size, the absolute amount of food evacuated per day (g. day−1 increased when meal size increased. The estimated maximum daily gastric evacuation rates were 0.8, 1.3 and 1.6 g/day with meal sizes 1%, 5% and 10% of burbot weight (200 g). No difference in gastric evacuation rate was observed between meals of the same size (8 g) but which consisted of either one or three vendace.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1111/j.1600-0633.1999.tb00052.x

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Oxygen consumption of burbot, Lota lota(L.), fed different rations of vendace, Coregonus albula L. (2000)

Pääkkönen, J. -P. J. ; Lyytikäinen, T.

Oxford, UK : Blackwell Science, Ltd

Journal of applied ichthyology 16 (2000), S. 0

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ISSN: 1439-0426

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Notes: The oxygen consumption of adult burbot, Lota lota (L.), was examined to determine the effects of fasting and meal ration on oxygen consumption rates. The temperature (2.1 °C) was selected to represent ambient conditions for burbot in winter. The average pre-feeding oxygen consumption rate was 29.5 mg kg−1 h−1. Feeding affected the oxygen consumption rates since the apparent heat increment correlated significantly with the meal ration. However, the meal ration (i.e. vendace, Coregonus albula L.) did not affect the proportion of the ingested meal energy used in the apparent heat increment. When the meal ration was increased, peak oxygen consumption ranged from 1.2 to 2.2 times higher than the fasting level. Observed low oxygen consumption values suggest that the metabolic processes of burbot are strongly reduced in low temperatures.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1046/j.1439-0426.2000.00251.x

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Development and validation of a bioenergetics model for juvenile and adult burbot (2003)

Pääkkönen, J.-P. J. ; Tikkanen, O. ; Karjalainen, J.

Oxford, UK : Blackwell Science Ltd

Journal of fish biology 63 (2003), S. 0

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ISSN: 1095-8649

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Biology

Notes: Oxygen consumption of juvenile and adult burbot Lota lota was measured in an intermittent-flow respirometer to determine the effect of temperature and fish body mass on metabolic rate. These results were combined with data from earlier experiments and the ‘Wisconsin bioenergetics’ model was constructed. The model was validated under laboratory conditions by comparing observed and predicted food consumption and growth of burbot fed on dead vendace Coregonus albula. There was a good correspondence between observed and estimated growth and food consumption under experimental conditions: the mean absolute per cent errors of growth and food consumption were 4·8 and 24·0%. Estimated values with the new model were an improvement over the Atlantic cod Gadus morhua model previously used for burbot. In the field, the reliability of food consumption estimates was verified by using polychlorinated biphenyls (PCB) accumulation as an indirect indicator of the food consumption rate. The total PCB concentration of nine out of 13 burbot was estimated accurately. Thus, the burbot model produced good estimates of food consumption, even under field conditions.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1046/j.1095-8649.2003.00203.x

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4

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Gastric evacuation rate of burbot fed single-fish meals at different temperatures (1997)

Pääkkönen, J.-P. J. ; Marjomäki, T. J.

Oxford, UK : Blackwell Publishing Ltd

Journal of fish biology 50 (1997), S. 0

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ISSN: 1095-8649

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Biology

Notes: The gastric evacuation rates of burbot Lota lota, fed a single meal of vendace, Coregonus albula, were measured in the laboratory at five temperatures (1·3, 2·6, 4·8, 9·4 and 12·6° C). Gastric evacuation rate increased exponentially with increasing temperatrure, but the results suggest that gastric evacuation rates of burbot at low temperatures are lower than those of other freshwater fish species. Temperature and the ratio of meal weight to burbot weight were the most important factors affecting gastric evacuation rate. There was no significant difference in gastric evacuation rate between three different prey species: vendace, perch Perca fluviatilis, and smelt Osmerus eperlanus.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1111/j.1095-8649.1997.tb01949.x

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