Effects of turbidity on the spontaneous and prey-searching activity of juvenile Atlantic cod ( Gadus morhua)
Increasing turbidity in coastal waters in the North Atlantic and adjacent seas has raised concerns about impacts on Atlantic cod ( Gadus morhua ) using these areas as nurseries. A previous experiment (Meager et al. 2005 Can. J. Fish. Aquat. Sci. 62 , 1978–1984) has shown that turbidity (up to 28 bea...
Published in: | Philosophical Transactions of the Royal Society B: Biological Sciences |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
The Royal Society
2007
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1098/rstb.2007.2104 https://royalsocietypublishing.org/doi/pdf/10.1098/rstb.2007.2104 https://royalsocietypublishing.org/doi/full-xml/10.1098/rstb.2007.2104 |
id |
crroyalsociety:10.1098/rstb.2007.2104 |
---|---|
record_format |
openpolar |
spelling |
crroyalsociety:10.1098/rstb.2007.2104 2024-09-15T17:55:26+00:00 Effects of turbidity on the spontaneous and prey-searching activity of juvenile Atlantic cod ( Gadus morhua) Meager, Justin J Batty, Robert S 2007 http://dx.doi.org/10.1098/rstb.2007.2104 https://royalsocietypublishing.org/doi/pdf/10.1098/rstb.2007.2104 https://royalsocietypublishing.org/doi/full-xml/10.1098/rstb.2007.2104 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Philosophical Transactions of the Royal Society B: Biological Sciences volume 362, issue 1487, page 2123-2130 ISSN 0962-8436 1471-2970 journal-article 2007 crroyalsociety https://doi.org/10.1098/rstb.2007.2104 2024-08-19T04:24:53Z Increasing turbidity in coastal waters in the North Atlantic and adjacent seas has raised concerns about impacts on Atlantic cod ( Gadus morhua ) using these areas as nurseries. A previous experiment (Meager et al. 2005 Can. J. Fish. Aquat. Sci. 62 , 1978–1984) has shown that turbidity (up to 28 beam attenuation m −1 ) had little effect on the foraging rate of juvenile cod. Although this was attributed to cod using chemoreception in conjunction with vision to locate prey, foraging rates may also be maintained by increased activity. Higher activity, however, is energetically costly and may offset benefits from increased foraging return. We examined the effects of turbidity on prey searching and spontaneous activity of juvenile cod in the laboratory, by measuring activity with and without prey cues. Activity of juvenile cod was nonlinearly affected by turbidity and was lower at intermediate turbidity, regardless of the presence of prey odour. Activity increased over time when prey odour was present and decreased when absent, but the effects of prey odour were similar across all turbidity levels. Position in the tank was unaffected by turbidity or prey odour. Reduced activity at intermediate turbidities is likely to offset longer prey-search times. At high turbidity (greater than 17 m −1 ), both longer prey-search times and higher activity indicate that increased energetic costs are probable. Article in Journal/Newspaper atlantic cod Gadus morhua North Atlantic The Royal Society Philosophical Transactions of the Royal Society B: Biological Sciences 362 1487 2123 2130 |
institution |
Open Polar |
collection |
The Royal Society |
op_collection_id |
crroyalsociety |
language |
English |
description |
Increasing turbidity in coastal waters in the North Atlantic and adjacent seas has raised concerns about impacts on Atlantic cod ( Gadus morhua ) using these areas as nurseries. A previous experiment (Meager et al. 2005 Can. J. Fish. Aquat. Sci. 62 , 1978–1984) has shown that turbidity (up to 28 beam attenuation m −1 ) had little effect on the foraging rate of juvenile cod. Although this was attributed to cod using chemoreception in conjunction with vision to locate prey, foraging rates may also be maintained by increased activity. Higher activity, however, is energetically costly and may offset benefits from increased foraging return. We examined the effects of turbidity on prey searching and spontaneous activity of juvenile cod in the laboratory, by measuring activity with and without prey cues. Activity of juvenile cod was nonlinearly affected by turbidity and was lower at intermediate turbidity, regardless of the presence of prey odour. Activity increased over time when prey odour was present and decreased when absent, but the effects of prey odour were similar across all turbidity levels. Position in the tank was unaffected by turbidity or prey odour. Reduced activity at intermediate turbidities is likely to offset longer prey-search times. At high turbidity (greater than 17 m −1 ), both longer prey-search times and higher activity indicate that increased energetic costs are probable. |
format |
Article in Journal/Newspaper |
author |
Meager, Justin J Batty, Robert S |
spellingShingle |
Meager, Justin J Batty, Robert S Effects of turbidity on the spontaneous and prey-searching activity of juvenile Atlantic cod ( Gadus morhua) |
author_facet |
Meager, Justin J Batty, Robert S |
author_sort |
Meager, Justin J |
title |
Effects of turbidity on the spontaneous and prey-searching activity of juvenile Atlantic cod ( Gadus morhua) |
title_short |
Effects of turbidity on the spontaneous and prey-searching activity of juvenile Atlantic cod ( Gadus morhua) |
title_full |
Effects of turbidity on the spontaneous and prey-searching activity of juvenile Atlantic cod ( Gadus morhua) |
title_fullStr |
Effects of turbidity on the spontaneous and prey-searching activity of juvenile Atlantic cod ( Gadus morhua) |
title_full_unstemmed |
Effects of turbidity on the spontaneous and prey-searching activity of juvenile Atlantic cod ( Gadus morhua) |
title_sort |
effects of turbidity on the spontaneous and prey-searching activity of juvenile atlantic cod ( gadus morhua) |
publisher |
The Royal Society |
publishDate |
2007 |
url |
http://dx.doi.org/10.1098/rstb.2007.2104 https://royalsocietypublishing.org/doi/pdf/10.1098/rstb.2007.2104 https://royalsocietypublishing.org/doi/full-xml/10.1098/rstb.2007.2104 |
genre |
atlantic cod Gadus morhua North Atlantic |
genre_facet |
atlantic cod Gadus morhua North Atlantic |
op_source |
Philosophical Transactions of the Royal Society B: Biological Sciences volume 362, issue 1487, page 2123-2130 ISSN 0962-8436 1471-2970 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rstb.2007.2104 |
container_title |
Philosophical Transactions of the Royal Society B: Biological Sciences |
container_volume |
362 |
container_issue |
1487 |
container_start_page |
2123 |
op_container_end_page |
2130 |
_version_ |
1810431729882628096 |