The interrelation between temperature regimes and fish size in juvenile Atlantic cod (Gadus morhua): effects on growth and feed conversion efficiency
Key words: active thermoregulation, behavioural growth physiology, feed conversion efficiency, optimal growth temperatures, size dependent growth The present paper describes the growth properties of juvenile Atlantic cod (Gadus morhua) reared at 7, 10, 13 and 16 °C, and a group reared under ‘‘temper...
Main Authors: | , , , , |
---|---|
Other Authors: | |
Format: | Text |
Language: | English |
Published: |
2005
|
Subjects: | |
Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.356.6213 |
id |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.356.6213 |
---|---|
record_format |
openpolar |
spelling |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.356.6213 2023-05-15T15:26:55+02:00 The interrelation between temperature regimes and fish size in juvenile Atlantic cod (Gadus morhua): effects on growth and feed conversion efficiency A. K. Imsl A. Foss A. Folkvord S. O. Stefansson T. M. Jonassen The Pennsylvania State University CiteSeerX Archives 2005 application/zip http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.356.6213 en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.356.6213 Metadata may be used without restrictions as long as the oai identifier remains attached to it. ftp://ftp.ncbi.nlm.nih.gov/pub/pmc/c6/28/Fish_Physiol_Biochem_2005_Dec_17_31(4)_347-361.tar.gz text 2005 ftciteseerx 2016-01-08T00:36:04Z Key words: active thermoregulation, behavioural growth physiology, feed conversion efficiency, optimal growth temperatures, size dependent growth The present paper describes the growth properties of juvenile Atlantic cod (Gadus morhua) reared at 7, 10, 13 and 16 °C, and a group reared under ‘‘temperature steps’ ’ i.e. with temperature reduced successively from 16 to 13 and 10 °C. Growth rate and feed conversion efficiency of juvenile Atlantic cod were significantly influenced by the interaction of temperature and fish size. Overall growth was highest in the 13 °C and the T-step groups but for different reasons, as the fish at 13 °C had 10 % higher overall feeding intake compared to the T-step group, whereas the T-step had 8 % higher feeding efficiency. After termination of the laboratory study the fish were reared in sea pens at ambient conditions for 17 months. The groups performed differently when reared at ambient conditions in the sea as the T-step group was 11.6, 11.5, 5.3 and 7.5 % larger than 7, 10, 13 and 16 °C, respectively in June 2005. Optimal temperature for growth and feed conversion efficiency decreased with size, indicating an ontogenetic reduction in optimum temperature for growth with increasing size. The results suggest an optimum temperature for growth of juvenile Atlantic cod in the size range 5–50 g dropping from 14.7 °C for 5–10 g juvenile to 12.4 °C for 40– Text atlantic cod Gadus morhua Unknown |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
description |
Key words: active thermoregulation, behavioural growth physiology, feed conversion efficiency, optimal growth temperatures, size dependent growth The present paper describes the growth properties of juvenile Atlantic cod (Gadus morhua) reared at 7, 10, 13 and 16 °C, and a group reared under ‘‘temperature steps’ ’ i.e. with temperature reduced successively from 16 to 13 and 10 °C. Growth rate and feed conversion efficiency of juvenile Atlantic cod were significantly influenced by the interaction of temperature and fish size. Overall growth was highest in the 13 °C and the T-step groups but for different reasons, as the fish at 13 °C had 10 % higher overall feeding intake compared to the T-step group, whereas the T-step had 8 % higher feeding efficiency. After termination of the laboratory study the fish were reared in sea pens at ambient conditions for 17 months. The groups performed differently when reared at ambient conditions in the sea as the T-step group was 11.6, 11.5, 5.3 and 7.5 % larger than 7, 10, 13 and 16 °C, respectively in June 2005. Optimal temperature for growth and feed conversion efficiency decreased with size, indicating an ontogenetic reduction in optimum temperature for growth with increasing size. The results suggest an optimum temperature for growth of juvenile Atlantic cod in the size range 5–50 g dropping from 14.7 °C for 5–10 g juvenile to 12.4 °C for 40– |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
A. K. Imsl A. Foss A. Folkvord S. O. Stefansson T. M. Jonassen |
spellingShingle |
A. K. Imsl A. Foss A. Folkvord S. O. Stefansson T. M. Jonassen The interrelation between temperature regimes and fish size in juvenile Atlantic cod (Gadus morhua): effects on growth and feed conversion efficiency |
author_facet |
A. K. Imsl A. Foss A. Folkvord S. O. Stefansson T. M. Jonassen |
author_sort |
A. K. Imsl |
title |
The interrelation between temperature regimes and fish size in juvenile Atlantic cod (Gadus morhua): effects on growth and feed conversion efficiency |
title_short |
The interrelation between temperature regimes and fish size in juvenile Atlantic cod (Gadus morhua): effects on growth and feed conversion efficiency |
title_full |
The interrelation between temperature regimes and fish size in juvenile Atlantic cod (Gadus morhua): effects on growth and feed conversion efficiency |
title_fullStr |
The interrelation between temperature regimes and fish size in juvenile Atlantic cod (Gadus morhua): effects on growth and feed conversion efficiency |
title_full_unstemmed |
The interrelation between temperature regimes and fish size in juvenile Atlantic cod (Gadus morhua): effects on growth and feed conversion efficiency |
title_sort |
interrelation between temperature regimes and fish size in juvenile atlantic cod (gadus morhua): effects on growth and feed conversion efficiency |
publishDate |
2005 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.356.6213 |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_source |
ftp://ftp.ncbi.nlm.nih.gov/pub/pmc/c6/28/Fish_Physiol_Biochem_2005_Dec_17_31(4)_347-361.tar.gz |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.356.6213 |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766357385495969792 |