A temperature- and size-dependent model of sand shrimp (Crangon septemspinosa) predation on juvenile winter flounder (Pseudopleuronectes americanus)
We investigated the temperature-mediated vulnerability of postsettled winter flounder (Pseudopleuronectes americanus) to sand shrimp (Crangon septemspinosa) predation. Small increases in flounder growth rates substantially decreased predator-induced mortality. Recent warming trends in Northwest Atla...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
---|---|
Main Authors: | , |
Format: | Text |
Language: | unknown |
Published: |
DigitalCommons@URI
2003
|
Subjects: | |
Online Access: | https://digitalcommons.uri.edu/gsofacpubs/945 https://doi.org/10.1139/f03-098 |
id |
ftunivrhodeislan:oai:digitalcommons.uri.edu:gsofacpubs-1914 |
---|---|
record_format |
openpolar |
spelling |
ftunivrhodeislan:oai:digitalcommons.uri.edu:gsofacpubs-1914 2023-10-09T21:54:40+02:00 A temperature- and size-dependent model of sand shrimp (Crangon septemspinosa) predation on juvenile winter flounder (Pseudopleuronectes americanus) Taylor, David L. Collie, Jeremy S. 2003-09-01T07:00:00Z https://digitalcommons.uri.edu/gsofacpubs/945 https://doi.org/10.1139/f03-098 unknown DigitalCommons@URI https://digitalcommons.uri.edu/gsofacpubs/945 doi:10.1139/f03-098 https://doi.org/10.1139/f03-098 Graduate School of Oceanography Faculty Publications text 2003 ftunivrhodeislan https://doi.org/10.1139/f03-098 2023-09-11T18:07:44Z We investigated the temperature-mediated vulnerability of postsettled winter flounder (Pseudopleuronectes americanus) to sand shrimp (Crangon septemspinosa) predation. Small increases in flounder growth rates substantially decreased predator-induced mortality. Recent warming trends in Northwest Atlantic estuaries can increase flounder survival by accelerating growth and minimizing the duration during which juveniles are susceptible to size-dependent predation. Extreme temperature increases, however, depress growth because a disproportionate amount of energy is devoted to increased metabolism, leaving less for somatic development. Flounder survival is also reduced during warm years because of intensified shrimp predation. Moreover, interannual variations in temperature affect the relative timing of shrimp migration and flounder settlement, thus controlling the spatial and temporal overlap between predator and prey. Predicted flounder abundance and survival were statistically unrelated to observed flounder abundance sampled annually during late spring. However, model predictions and field data suggest that flounder abundance is maximal in years when seasonally averaged temperature is approximately 16°C. Above and below this temperature, flounder year-class size is considerably lower, possibly as a result of temperature effects on trophic dynamics. We conclude that shrimp predation is a significant source of mortality for postsettled flounder, but it is not the sole determinant of interannual variations in recruitment. Text Northwest Atlantic University of Rhode Island: DigitalCommons@URI Canadian Journal of Fisheries and Aquatic Sciences 60 9 1133 1148 |
institution |
Open Polar |
collection |
University of Rhode Island: DigitalCommons@URI |
op_collection_id |
ftunivrhodeislan |
language |
unknown |
description |
We investigated the temperature-mediated vulnerability of postsettled winter flounder (Pseudopleuronectes americanus) to sand shrimp (Crangon septemspinosa) predation. Small increases in flounder growth rates substantially decreased predator-induced mortality. Recent warming trends in Northwest Atlantic estuaries can increase flounder survival by accelerating growth and minimizing the duration during which juveniles are susceptible to size-dependent predation. Extreme temperature increases, however, depress growth because a disproportionate amount of energy is devoted to increased metabolism, leaving less for somatic development. Flounder survival is also reduced during warm years because of intensified shrimp predation. Moreover, interannual variations in temperature affect the relative timing of shrimp migration and flounder settlement, thus controlling the spatial and temporal overlap between predator and prey. Predicted flounder abundance and survival were statistically unrelated to observed flounder abundance sampled annually during late spring. However, model predictions and field data suggest that flounder abundance is maximal in years when seasonally averaged temperature is approximately 16°C. Above and below this temperature, flounder year-class size is considerably lower, possibly as a result of temperature effects on trophic dynamics. We conclude that shrimp predation is a significant source of mortality for postsettled flounder, but it is not the sole determinant of interannual variations in recruitment. |
format |
Text |
author |
Taylor, David L. Collie, Jeremy S. |
spellingShingle |
Taylor, David L. Collie, Jeremy S. A temperature- and size-dependent model of sand shrimp (Crangon septemspinosa) predation on juvenile winter flounder (Pseudopleuronectes americanus) |
author_facet |
Taylor, David L. Collie, Jeremy S. |
author_sort |
Taylor, David L. |
title |
A temperature- and size-dependent model of sand shrimp (Crangon septemspinosa) predation on juvenile winter flounder (Pseudopleuronectes americanus) |
title_short |
A temperature- and size-dependent model of sand shrimp (Crangon septemspinosa) predation on juvenile winter flounder (Pseudopleuronectes americanus) |
title_full |
A temperature- and size-dependent model of sand shrimp (Crangon septemspinosa) predation on juvenile winter flounder (Pseudopleuronectes americanus) |
title_fullStr |
A temperature- and size-dependent model of sand shrimp (Crangon septemspinosa) predation on juvenile winter flounder (Pseudopleuronectes americanus) |
title_full_unstemmed |
A temperature- and size-dependent model of sand shrimp (Crangon septemspinosa) predation on juvenile winter flounder (Pseudopleuronectes americanus) |
title_sort |
temperature- and size-dependent model of sand shrimp (crangon septemspinosa) predation on juvenile winter flounder (pseudopleuronectes americanus) |
publisher |
DigitalCommons@URI |
publishDate |
2003 |
url |
https://digitalcommons.uri.edu/gsofacpubs/945 https://doi.org/10.1139/f03-098 |
genre |
Northwest Atlantic |
genre_facet |
Northwest Atlantic |
op_source |
Graduate School of Oceanography Faculty Publications |
op_relation |
https://digitalcommons.uri.edu/gsofacpubs/945 doi:10.1139/f03-098 https://doi.org/10.1139/f03-098 |
op_doi |
https://doi.org/10.1139/f03-098 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
60 |
container_issue |
9 |
container_start_page |
1133 |
op_container_end_page |
1148 |
_version_ |
1779318349364199424 |