FEEDING RATE AND DAILY ENERGY INTAKE OF DALL'S PORPOISE IN THE NORTHEASTERN SEA OF JAPAN (19th Symposium on Polar Biology)
We examined thirty stomachs of Dall's porpoises (Phocoenoides dalli) collected on board a hand harpoon fishery vessel in the Sea of Japan off Hokkaido in May 1995 Maximum ratio of stomach content weight to body weight of the sated animals (MRSCW, 1 68%) was recorded early in the morning, and av...
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ftnipr:oai:nipr.repo.nii.ac.jp:00005365 2023-05-15T18:02:00+02:00 FEEDING RATE AND DAILY ENERGY INTAKE OF DALL'S PORPOISE IN THE NORTHEASTERN SEA OF JAPAN (19th Symposium on Polar Biology) オオイズミ ヒロシ ミヤザキ ノブユキ Hiroshi OHIZUMI Nobuyuki MIYAZAKI 1998-02 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=5365 http://id.nii.ac.jp/1291/00005365/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=5365&item_no=1&attribute_id=18&file_no=1 en eng Proceeding Otsuchi Marine Research Center, Ocean Research Institute, The University of Tokyo National Institute of Polar Research https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=5365 http://id.nii.ac.jp/1291/00005365/ AA10819561 Proceedings of the NIPR Symposium on Polar Biology, 11, 74-81(1998-02) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=5365&item_no=1&attribute_id=18&file_no=1 Dall's porpoise Phocoenoides dalh feeding rate energy intake stomach contents Departmental Bulletin Paper P(論文) 1998 ftnipr 2023-02-25T20:13:31Z We examined thirty stomachs of Dall's porpoises (Phocoenoides dalli) collected on board a hand harpoon fishery vessel in the Sea of Japan off Hokkaido in May 1995 Maximum ratio of stomach content weight to body weight of the sated animals (MRSCW, 1 68%) was recorded early in the morning, and average of the ratio decreased in the daytime T TOBAYAMA (Studies on the feeding habits of the little toothed whales. Ph. D. thesis, Umv Tokyo, 1974) reported that digestion time was eight hours from full stomach to empty on captive Tursiops gilli and Delphmus delphis The eight hour digestion profile was almost middle of the possible digestion time range found in this study. Assuming that the digestion time was eight hours, maximum daily digestible food intake was estimated at 5.04% (MRSCW×24/8) of body weight. This value is between the feeding rate indirectly obtained from the biological concentration rate of mercury in the wild Dall's porpoise (2-3%), and that directly measured from a captive porpoise (12 5%) Daily intake of energy was calculated as 27 2MJ for a 108kg Dall's porpoise from prey energy density, weight contribution rate of prey and 5% feeding rate. This is close to 25 5MJ of the daily energy requirement calculated by the allometnc method using body weight. Report Polar Biology Proceedings of the NIPR Symposium on Polar Biology toothed whales National Institute of Polar Research Repository, Japan |
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Open Polar |
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National Institute of Polar Research Repository, Japan |
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ftnipr |
language |
English |
topic |
Dall's porpoise Phocoenoides dalh feeding rate energy intake stomach contents |
spellingShingle |
Dall's porpoise Phocoenoides dalh feeding rate energy intake stomach contents オオイズミ ヒロシ ミヤザキ ノブユキ Hiroshi OHIZUMI Nobuyuki MIYAZAKI FEEDING RATE AND DAILY ENERGY INTAKE OF DALL'S PORPOISE IN THE NORTHEASTERN SEA OF JAPAN (19th Symposium on Polar Biology) |
topic_facet |
Dall's porpoise Phocoenoides dalh feeding rate energy intake stomach contents |
description |
We examined thirty stomachs of Dall's porpoises (Phocoenoides dalli) collected on board a hand harpoon fishery vessel in the Sea of Japan off Hokkaido in May 1995 Maximum ratio of stomach content weight to body weight of the sated animals (MRSCW, 1 68%) was recorded early in the morning, and average of the ratio decreased in the daytime T TOBAYAMA (Studies on the feeding habits of the little toothed whales. Ph. D. thesis, Umv Tokyo, 1974) reported that digestion time was eight hours from full stomach to empty on captive Tursiops gilli and Delphmus delphis The eight hour digestion profile was almost middle of the possible digestion time range found in this study. Assuming that the digestion time was eight hours, maximum daily digestible food intake was estimated at 5.04% (MRSCW×24/8) of body weight. This value is between the feeding rate indirectly obtained from the biological concentration rate of mercury in the wild Dall's porpoise (2-3%), and that directly measured from a captive porpoise (12 5%) Daily intake of energy was calculated as 27 2MJ for a 108kg Dall's porpoise from prey energy density, weight contribution rate of prey and 5% feeding rate. This is close to 25 5MJ of the daily energy requirement calculated by the allometnc method using body weight. |
format |
Report |
author |
オオイズミ ヒロシ ミヤザキ ノブユキ Hiroshi OHIZUMI Nobuyuki MIYAZAKI |
author_facet |
オオイズミ ヒロシ ミヤザキ ノブユキ Hiroshi OHIZUMI Nobuyuki MIYAZAKI |
author_sort |
オオイズミ ヒロシ |
title |
FEEDING RATE AND DAILY ENERGY INTAKE OF DALL'S PORPOISE IN THE NORTHEASTERN SEA OF JAPAN (19th Symposium on Polar Biology) |
title_short |
FEEDING RATE AND DAILY ENERGY INTAKE OF DALL'S PORPOISE IN THE NORTHEASTERN SEA OF JAPAN (19th Symposium on Polar Biology) |
title_full |
FEEDING RATE AND DAILY ENERGY INTAKE OF DALL'S PORPOISE IN THE NORTHEASTERN SEA OF JAPAN (19th Symposium on Polar Biology) |
title_fullStr |
FEEDING RATE AND DAILY ENERGY INTAKE OF DALL'S PORPOISE IN THE NORTHEASTERN SEA OF JAPAN (19th Symposium on Polar Biology) |
title_full_unstemmed |
FEEDING RATE AND DAILY ENERGY INTAKE OF DALL'S PORPOISE IN THE NORTHEASTERN SEA OF JAPAN (19th Symposium on Polar Biology) |
title_sort |
feeding rate and daily energy intake of dall's porpoise in the northeastern sea of japan (19th symposium on polar biology) |
publisher |
Proceeding |
publishDate |
1998 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=5365 http://id.nii.ac.jp/1291/00005365/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=5365&item_no=1&attribute_id=18&file_no=1 |
genre |
Polar Biology Proceedings of the NIPR Symposium on Polar Biology toothed whales |
genre_facet |
Polar Biology Proceedings of the NIPR Symposium on Polar Biology toothed whales |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=5365 http://id.nii.ac.jp/1291/00005365/ AA10819561 Proceedings of the NIPR Symposium on Polar Biology, 11, 74-81(1998-02) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=5365&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766171636473528320 |