Recalculated diet and daily ration of the shortfin mako (Isurus oxyrinchus), with a focus on quantifying predation on bluefish (Pomatomus saltatrix) in the northwest Atlantic Ocean
The diet and daily ration of the shortfin mako (Isurus oxyrinchus) in the northwest Atlantic were re-examined to determine whether fluctuations in prey abundance andavailability are reflected in these two biological variables. During the summers of 2001 and 2002, stomachcontent data were collected f...
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ftoceandocs:oai:aquadocs.org:1834/25462 2023-05-15T17:45:32+02:00 Recalculated diet and daily ration of the shortfin mako (Isurus oxyrinchus), with a focus on quantifying predation on bluefish (Pomatomus saltatrix) in the northwest Atlantic Ocean Wood, Anthony D. Wetherbee, Bradley M. Juanes, Francis Kohler, Nancy E. Wilga, Cheryl 2009 application/pdf 76-88 http://hdl.handle.net/1834/25462 en eng http://fishbull.noaa.gov/1071/wood.pdf 0090-0656 http://hdl.handle.net/1834/25462 http://aquaticcommons.org/id/eprint/8813 403 2014-01-02 19:20:40 8813 United States National Marine Fisheries Service Biology Ecology Fisheries article TRUE 2009 ftoceandocs 2023-04-06T17:02:54Z The diet and daily ration of the shortfin mako (Isurus oxyrinchus) in the northwest Atlantic were re-examined to determine whether fluctuations in prey abundance andavailability are reflected in these two biological variables. During the summers of 2001 and 2002, stomachcontent data were collected from fishing tournaments along the northeast coast of the United States. These data were quantified by using four diet indices and were compared toindex calculations from historical diet data collected from 1972 through 1983. Bluefish (Pomatomus saltatrix) were the predominant prey in the 1972–83 and 2001–02 diets, accounting for 92.6% of the current diet by weight and 86.9% of the historical diet by volume. From the 2001– 02diet data, daily ration was estimated and it indicated that shortfin makos must consume roughly 4.6% of their body weight per day to fulfill energetic demands. The daily energetic requirement was broken down by using a calculated energy content for the current diet of 4909 KJ/kg. Based on the proportional energy of bluefish in the diet by weight, an average shortfin mako consumes roughly 500 kg of bluefish per year off the northeast coast of the United States. The results are discussed in relation to the potential effect of intense shortfin mako predation on bluefish abundance in the region. Article in Journal/Newspaper Northwest Atlantic IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications |
institution |
Open Polar |
collection |
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications |
op_collection_id |
ftoceandocs |
language |
English |
topic |
Biology Ecology Fisheries |
spellingShingle |
Biology Ecology Fisheries Wood, Anthony D. Wetherbee, Bradley M. Juanes, Francis Kohler, Nancy E. Wilga, Cheryl Recalculated diet and daily ration of the shortfin mako (Isurus oxyrinchus), with a focus on quantifying predation on bluefish (Pomatomus saltatrix) in the northwest Atlantic Ocean |
topic_facet |
Biology Ecology Fisheries |
description |
The diet and daily ration of the shortfin mako (Isurus oxyrinchus) in the northwest Atlantic were re-examined to determine whether fluctuations in prey abundance andavailability are reflected in these two biological variables. During the summers of 2001 and 2002, stomachcontent data were collected from fishing tournaments along the northeast coast of the United States. These data were quantified by using four diet indices and were compared toindex calculations from historical diet data collected from 1972 through 1983. Bluefish (Pomatomus saltatrix) were the predominant prey in the 1972–83 and 2001–02 diets, accounting for 92.6% of the current diet by weight and 86.9% of the historical diet by volume. From the 2001– 02diet data, daily ration was estimated and it indicated that shortfin makos must consume roughly 4.6% of their body weight per day to fulfill energetic demands. The daily energetic requirement was broken down by using a calculated energy content for the current diet of 4909 KJ/kg. Based on the proportional energy of bluefish in the diet by weight, an average shortfin mako consumes roughly 500 kg of bluefish per year off the northeast coast of the United States. The results are discussed in relation to the potential effect of intense shortfin mako predation on bluefish abundance in the region. |
format |
Article in Journal/Newspaper |
author |
Wood, Anthony D. Wetherbee, Bradley M. Juanes, Francis Kohler, Nancy E. Wilga, Cheryl |
author_facet |
Wood, Anthony D. Wetherbee, Bradley M. Juanes, Francis Kohler, Nancy E. Wilga, Cheryl |
author_sort |
Wood, Anthony D. |
title |
Recalculated diet and daily ration of the shortfin mako (Isurus oxyrinchus), with a focus on quantifying predation on bluefish (Pomatomus saltatrix) in the northwest Atlantic Ocean |
title_short |
Recalculated diet and daily ration of the shortfin mako (Isurus oxyrinchus), with a focus on quantifying predation on bluefish (Pomatomus saltatrix) in the northwest Atlantic Ocean |
title_full |
Recalculated diet and daily ration of the shortfin mako (Isurus oxyrinchus), with a focus on quantifying predation on bluefish (Pomatomus saltatrix) in the northwest Atlantic Ocean |
title_fullStr |
Recalculated diet and daily ration of the shortfin mako (Isurus oxyrinchus), with a focus on quantifying predation on bluefish (Pomatomus saltatrix) in the northwest Atlantic Ocean |
title_full_unstemmed |
Recalculated diet and daily ration of the shortfin mako (Isurus oxyrinchus), with a focus on quantifying predation on bluefish (Pomatomus saltatrix) in the northwest Atlantic Ocean |
title_sort |
recalculated diet and daily ration of the shortfin mako (isurus oxyrinchus), with a focus on quantifying predation on bluefish (pomatomus saltatrix) in the northwest atlantic ocean |
publishDate |
2009 |
url |
http://hdl.handle.net/1834/25462 |
genre |
Northwest Atlantic |
genre_facet |
Northwest Atlantic |
op_source |
http://aquaticcommons.org/id/eprint/8813 403 2014-01-02 19:20:40 8813 United States National Marine Fisheries Service |
op_relation |
http://fishbull.noaa.gov/1071/wood.pdf 0090-0656 http://hdl.handle.net/1834/25462 |
_version_ |
1766148631057924096 |