Effect of temperature on the functional response and foraging behavior of the sand shrimp Crangon septemspinosa preying on juvenile winter flounder Pseudopleuronectes americanus
Predator-prey dynamics between the sand shrimp Crangon septemspinosa and juvenile winter flounder Pseudopleuronectes americanus were examined in laboratory experiments to assess the joint effects of varying prey density and temperature on shrimp foraging behavior and flounder mortality. The function...
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Online Access: | https://digitalcommons.uri.edu/gsofacpubs/943 https://doi.org/10.3354/meps263217 |
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ftunivrhodeislan:oai:digitalcommons.uri.edu:gsofacpubs-1912 2023-10-09T21:54:40+02:00 Effect of temperature on the functional response and foraging behavior of the sand shrimp Crangon septemspinosa preying on juvenile winter flounder Pseudopleuronectes americanus Taylor, David L. Collie, Jeremy S. 2003-11-28T08:00:00Z https://digitalcommons.uri.edu/gsofacpubs/943 https://doi.org/10.3354/meps263217 unknown DigitalCommons@URI https://digitalcommons.uri.edu/gsofacpubs/943 doi:10.3354/meps263217 https://doi.org/10.3354/meps263217 Graduate School of Oceanography Faculty Publications Crangon septemspinosa Foraging behavior Functional response Predation Pseudopleuronectes americanus Sand shrimp Winter flounder text 2003 ftunivrhodeislan https://doi.org/10.3354/meps263217 2023-09-11T18:07:44Z Predator-prey dynamics between the sand shrimp Crangon septemspinosa and juvenile winter flounder Pseudopleuronectes americanus were examined in laboratory experiments to assess the joint effects of varying prey density and temperature on shrimp foraging behavior and flounder mortality. The functional response of shrimp to 6 densities of flounder was determined at 2 temperatures (10 and 16°C). The behavioral mechanisms underlying the shrimp's functional response were quantified with visual observations and compared to the foraging parameters predicted by continuous-time functional response models. Shrimp consumption rates increased significantly with increasing flounder density, irrespective of water temperature. At low flounder densities, however, significantly more flounder were consumed at 16°C than at 10°C. Analysis of proportional mortality of flounder across prey density and general functional response models revealed a sigmoidal, Type III functional response at 10°C, and a hyperbolic, Type II functional response at 16°C. Model parameter estimates and visual observations of shrimp foraging behavior suggest that the variable functional responses at different temperatures are the result of cold temperatures decreasing predator activity at low flounder densities, and conversely, shrimp maintaining high attack rates at low flounder densities when exposed to warm temperatures. These findings indicate that shrimp are capable of driving flounder populations to local extinction during warm water conditions. The recent warming trend experienced in northwest Atlantic estuaries, and its impact on trophic dynamics, may therefore explain the failure of the winter flounder stocks to recover in these areas. Text Northwest Atlantic University of Rhode Island: DigitalCommons@URI Marine Ecology Progress Series 263 217 234 |
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Open Polar |
collection |
University of Rhode Island: DigitalCommons@URI |
op_collection_id |
ftunivrhodeislan |
language |
unknown |
topic |
Crangon septemspinosa Foraging behavior Functional response Predation Pseudopleuronectes americanus Sand shrimp Winter flounder |
spellingShingle |
Crangon septemspinosa Foraging behavior Functional response Predation Pseudopleuronectes americanus Sand shrimp Winter flounder Taylor, David L. Collie, Jeremy S. Effect of temperature on the functional response and foraging behavior of the sand shrimp Crangon septemspinosa preying on juvenile winter flounder Pseudopleuronectes americanus |
topic_facet |
Crangon septemspinosa Foraging behavior Functional response Predation Pseudopleuronectes americanus Sand shrimp Winter flounder |
description |
Predator-prey dynamics between the sand shrimp Crangon septemspinosa and juvenile winter flounder Pseudopleuronectes americanus were examined in laboratory experiments to assess the joint effects of varying prey density and temperature on shrimp foraging behavior and flounder mortality. The functional response of shrimp to 6 densities of flounder was determined at 2 temperatures (10 and 16°C). The behavioral mechanisms underlying the shrimp's functional response were quantified with visual observations and compared to the foraging parameters predicted by continuous-time functional response models. Shrimp consumption rates increased significantly with increasing flounder density, irrespective of water temperature. At low flounder densities, however, significantly more flounder were consumed at 16°C than at 10°C. Analysis of proportional mortality of flounder across prey density and general functional response models revealed a sigmoidal, Type III functional response at 10°C, and a hyperbolic, Type II functional response at 16°C. Model parameter estimates and visual observations of shrimp foraging behavior suggest that the variable functional responses at different temperatures are the result of cold temperatures decreasing predator activity at low flounder densities, and conversely, shrimp maintaining high attack rates at low flounder densities when exposed to warm temperatures. These findings indicate that shrimp are capable of driving flounder populations to local extinction during warm water conditions. The recent warming trend experienced in northwest Atlantic estuaries, and its impact on trophic dynamics, may therefore explain the failure of the winter flounder stocks to recover in these areas. |
format |
Text |
author |
Taylor, David L. Collie, Jeremy S. |
author_facet |
Taylor, David L. Collie, Jeremy S. |
author_sort |
Taylor, David L. |
title |
Effect of temperature on the functional response and foraging behavior of the sand shrimp Crangon septemspinosa preying on juvenile winter flounder Pseudopleuronectes americanus |
title_short |
Effect of temperature on the functional response and foraging behavior of the sand shrimp Crangon septemspinosa preying on juvenile winter flounder Pseudopleuronectes americanus |
title_full |
Effect of temperature on the functional response and foraging behavior of the sand shrimp Crangon septemspinosa preying on juvenile winter flounder Pseudopleuronectes americanus |
title_fullStr |
Effect of temperature on the functional response and foraging behavior of the sand shrimp Crangon septemspinosa preying on juvenile winter flounder Pseudopleuronectes americanus |
title_full_unstemmed |
Effect of temperature on the functional response and foraging behavior of the sand shrimp Crangon septemspinosa preying on juvenile winter flounder Pseudopleuronectes americanus |
title_sort |
effect of temperature on the functional response and foraging behavior of the sand shrimp crangon septemspinosa preying on juvenile winter flounder pseudopleuronectes americanus |
publisher |
DigitalCommons@URI |
publishDate |
2003 |
url |
https://digitalcommons.uri.edu/gsofacpubs/943 https://doi.org/10.3354/meps263217 |
genre |
Northwest Atlantic |
genre_facet |
Northwest Atlantic |
op_source |
Graduate School of Oceanography Faculty Publications |
op_relation |
https://digitalcommons.uri.edu/gsofacpubs/943 doi:10.3354/meps263217 https://doi.org/10.3354/meps263217 |
op_doi |
https://doi.org/10.3354/meps263217 |
container_title |
Marine Ecology Progress Series |
container_volume |
263 |
container_start_page |
217 |
op_container_end_page |
234 |
_version_ |
1779318355393511424 |