Measuring methods for fish welfare during slaughter based on electrical impedance, EEG, ECG and blood parameters
Improved animal welfare during industrial slaughtering of fish is the aim of the scientific work presented in this thesis. The thesis is based on four publications that cover different stages of an automated industrial slaughtering line for fish. The publications are presented in a similar order to...
Published in: | Fish Physiology and Biochemistry |
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Main Author: | |
Format: | Doctoral or Postdoctoral Thesis |
Language: | English |
Published: |
The University of Bergen
2016
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Subjects: | |
Online Access: | https://hdl.handle.net/1956/12226 |
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ftunivbergen:oai:bora.uib.no:1956/12226 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
topic |
Bedøvelse Kjøling Dyrevern Oppdrettsfisk |
spellingShingle |
Bedøvelse Kjøling Dyrevern Oppdrettsfisk Grimsbø, Endre Measuring methods for fish welfare during slaughter based on electrical impedance, EEG, ECG and blood parameters |
topic_facet |
Bedøvelse Kjøling Dyrevern Oppdrettsfisk |
description |
Improved animal welfare during industrial slaughtering of fish is the aim of the scientific work presented in this thesis. The thesis is based on four publications that cover different stages of an automated industrial slaughtering line for fish. The publications are presented in a similar order to those on a slaughtering line. The results from paper I are relevant for all types of pre-chilling of fish before slaughtering and reveal the physiological effects of live chilling in Atlantic salmon (Salmo salar). Chilling of fish is commonly used in the industry, both during transportation and processing of the fish in the slaughtering house. The publication is based on two experiments where the first experiment included fish (mean weight 840 g) acclimatized to a water temperature of either 16, 8, or 4°C and which were directly transferred horizontally or vertically (9 combinations) to temperatures of 16, 8, 4, or 0°C using a dip net. In the second experiment, fish (mean weight 916 g) acclimatized to 16°C were exposed to four temperature-drop regimes (no physical handling): 16–4°C (over 5 h), 16–4°C (over 1 h), 16–0°C (over 5 h), and 16–0°C (over 1 h). Physical transfers in the first trial, i.e., temperature drops, resulted in immediate (1 h) increases in blood lactate concentrations at all three temperatures, but levels were significantly reduced and close to pretransfer levels after 6 h. Horizontal transfers, i.e. 16–16°C, 8–8°C, and 4–4°C, resulted in similar increases and were not significantly different from the groups exposed to temperature drops. The most severe vertical transfer (16-0°C) resulted in a swift loss of equilibrium and eventually death. In experiment No.2, temperature drops from 16 to 4°C and from 16 to 0°C over a period of one or 5 h, without physically handling the fish, resulted in no significant increases in any of the measured parameters 1 h post-transfer, except in the 16–0°C (1 h) group. The latter experienced a significant increase in blood sodium, glucose, lactate and cortisol levels ... |
format |
Doctoral or Postdoctoral Thesis |
author |
Grimsbø, Endre |
author_facet |
Grimsbø, Endre |
author_sort |
Grimsbø, Endre |
title |
Measuring methods for fish welfare during slaughter based on electrical impedance, EEG, ECG and blood parameters |
title_short |
Measuring methods for fish welfare during slaughter based on electrical impedance, EEG, ECG and blood parameters |
title_full |
Measuring methods for fish welfare during slaughter based on electrical impedance, EEG, ECG and blood parameters |
title_fullStr |
Measuring methods for fish welfare during slaughter based on electrical impedance, EEG, ECG and blood parameters |
title_full_unstemmed |
Measuring methods for fish welfare during slaughter based on electrical impedance, EEG, ECG and blood parameters |
title_sort |
measuring methods for fish welfare during slaughter based on electrical impedance, eeg, ecg and blood parameters |
publisher |
The University of Bergen |
publishDate |
2016 |
url |
https://hdl.handle.net/1956/12226 |
long_lat |
ENVELOPE(-85.633,-85.633,-78.617,-78.617) |
geographic |
Slaughter |
geographic_facet |
Slaughter |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
Paper I: Foss, A., Grimsbø, E., Vikingstad, E., Nortvedt, R., Slinde, E., Roth, B. (2012). Live chilling of Atlantic salmon: physiological response to handling and temperature decrease on welfare. Fish Physiology and Biochemistry, 38, 565-571. This article is not available in BORA. The published version is available at: 10.1007/s10695-011-9536-6 Paper II: Lambooij, E., Grimsbø, E., van de Vis, J.W., Reimert, H. G. N., Nortvedt, R., Roth, B. (2010). Percussion and electrical stunning of Atlantic salmon (Salmo salar) after dewatering and subsequent effect on brain and heart activities. Aquaculture, 300, 107–112. This article is not available in BORA. The published version is available at: 10.1016/j.aquaculture.2009.12.022 Paper III: Grimsbø, E., Nortvedt, R., Hjertaker, B. T., Hammer, E., Roth, B. (2016). Optimal AC frequency range for electro stunning of Atlantic salmon (Salmo salar). Aquaculture, 451, 283- 288. This article is not available in BORA. The published version is available at: 10.1016/j.aquaculture.2015.08.030 Paper IV: Grimsbø, E., Nortvedt, R., Hammer, E., Roth, B. (2014). Preventing injuries and recovery for electrically stunned Atlantic salmon (Salmo salar) using high frequency spectrum combined with a thermal shock. Aquaculture, 434, 277–281. This article is not available in BORA. The published version is available at: 10.1016/j.aquaculture.2014.07.018 https://hdl.handle.net/1956/12226 |
op_rights |
Copyright the author. All rights reserved. |
op_doi |
https://doi.org/10.1007/s10695-011-9536-610.1016/j.aquaculture.2009.12.02210.1016/j.aquaculture.2015.08.03010.1016/j.aquaculture.2014.07.018 |
container_title |
Fish Physiology and Biochemistry |
container_volume |
38 |
container_issue |
2 |
container_start_page |
565 |
op_container_end_page |
571 |
_version_ |
1766363497041494016 |
spelling |
ftunivbergen:oai:bora.uib.no:1956/12226 2023-05-15T15:33:02+02:00 Measuring methods for fish welfare during slaughter based on electrical impedance, EEG, ECG and blood parameters Grimsbø, Endre 2016-04-28 application/pdf https://hdl.handle.net/1956/12226 eng eng The University of Bergen Paper I: Foss, A., Grimsbø, E., Vikingstad, E., Nortvedt, R., Slinde, E., Roth, B. (2012). Live chilling of Atlantic salmon: physiological response to handling and temperature decrease on welfare. Fish Physiology and Biochemistry, 38, 565-571. This article is not available in BORA. The published version is available at: 10.1007/s10695-011-9536-6 Paper II: Lambooij, E., Grimsbø, E., van de Vis, J.W., Reimert, H. G. N., Nortvedt, R., Roth, B. (2010). Percussion and electrical stunning of Atlantic salmon (Salmo salar) after dewatering and subsequent effect on brain and heart activities. Aquaculture, 300, 107–112. This article is not available in BORA. The published version is available at: 10.1016/j.aquaculture.2009.12.022 Paper III: Grimsbø, E., Nortvedt, R., Hjertaker, B. T., Hammer, E., Roth, B. (2016). Optimal AC frequency range for electro stunning of Atlantic salmon (Salmo salar). Aquaculture, 451, 283- 288. This article is not available in BORA. The published version is available at: 10.1016/j.aquaculture.2015.08.030 Paper IV: Grimsbø, E., Nortvedt, R., Hammer, E., Roth, B. (2014). Preventing injuries and recovery for electrically stunned Atlantic salmon (Salmo salar) using high frequency spectrum combined with a thermal shock. Aquaculture, 434, 277–281. This article is not available in BORA. The published version is available at: 10.1016/j.aquaculture.2014.07.018 https://hdl.handle.net/1956/12226 Copyright the author. All rights reserved. Bedøvelse Kjøling Dyrevern Oppdrettsfisk Doctoral thesis 2016 ftunivbergen https://doi.org/10.1007/s10695-011-9536-610.1016/j.aquaculture.2009.12.02210.1016/j.aquaculture.2015.08.03010.1016/j.aquaculture.2014.07.018 2023-03-14T17:44:53Z Improved animal welfare during industrial slaughtering of fish is the aim of the scientific work presented in this thesis. The thesis is based on four publications that cover different stages of an automated industrial slaughtering line for fish. The publications are presented in a similar order to those on a slaughtering line. The results from paper I are relevant for all types of pre-chilling of fish before slaughtering and reveal the physiological effects of live chilling in Atlantic salmon (Salmo salar). Chilling of fish is commonly used in the industry, both during transportation and processing of the fish in the slaughtering house. The publication is based on two experiments where the first experiment included fish (mean weight 840 g) acclimatized to a water temperature of either 16, 8, or 4°C and which were directly transferred horizontally or vertically (9 combinations) to temperatures of 16, 8, 4, or 0°C using a dip net. In the second experiment, fish (mean weight 916 g) acclimatized to 16°C were exposed to four temperature-drop regimes (no physical handling): 16–4°C (over 5 h), 16–4°C (over 1 h), 16–0°C (over 5 h), and 16–0°C (over 1 h). Physical transfers in the first trial, i.e., temperature drops, resulted in immediate (1 h) increases in blood lactate concentrations at all three temperatures, but levels were significantly reduced and close to pretransfer levels after 6 h. Horizontal transfers, i.e. 16–16°C, 8–8°C, and 4–4°C, resulted in similar increases and were not significantly different from the groups exposed to temperature drops. The most severe vertical transfer (16-0°C) resulted in a swift loss of equilibrium and eventually death. In experiment No.2, temperature drops from 16 to 4°C and from 16 to 0°C over a period of one or 5 h, without physically handling the fish, resulted in no significant increases in any of the measured parameters 1 h post-transfer, except in the 16–0°C (1 h) group. The latter experienced a significant increase in blood sodium, glucose, lactate and cortisol levels ... Doctoral or Postdoctoral Thesis Atlantic salmon Salmo salar University of Bergen: Bergen Open Research Archive (BORA-UiB) Slaughter ENVELOPE(-85.633,-85.633,-78.617,-78.617) Fish Physiology and Biochemistry 38 2 565 571 |