Spatial distribution of Antarctic minke whales ( Balaenoptera bonaerensis) in relation to spatial distributions of krill in the Ross Sea, Antarctica
Abstract The spatial distribution of Antarctic minke whales in the Ross Sea with relation to spatial distributions of their prey – krill – was investigated in this study using generalized additive models ( GAM s). Spatial distributions of two species of krill (ice and Antarctic krill) were estimated...
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crwiley:10.1111/fog.12011 2024-09-15T17:43:14+00:00 Spatial distribution of Antarctic minke whales ( Balaenoptera bonaerensis) in relation to spatial distributions of krill in the Ross Sea, Antarctica Murase, Hiroto Kitakado, Toshihide Hakamada, Takashi Matsuoka, Koji Nishiwaki, Shigetoshi Naganobu, Mikio 2013 http://dx.doi.org/10.1111/fog.12011 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Ffog.12011 https://onlinelibrary.wiley.com/doi/pdf/10.1111/fog.12011 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Fisheries Oceanography volume 22, issue 3, page 154-173 ISSN 1054-6006 1365-2419 journal-article 2013 crwiley https://doi.org/10.1111/fog.12011 2024-08-01T04:24:00Z Abstract The spatial distribution of Antarctic minke whales in the Ross Sea with relation to spatial distributions of their prey – krill – was investigated in this study using generalized additive models ( GAM s). Spatial distributions of two species of krill (ice and Antarctic krill) were estimated by GAM s. Three abiotic factors – distance from the continental shelf break (800 m isobaths), the mean temperature and salinity from the surface to 200 m ( MTEM ‐200 and MSAL ‐200), and latitude and longitude – were used as covariates for models of krill. Estimated spatial distributions of krill were then used with other covariates to model the spatial distribution of Antarctic minke whales. In the selected model of Antarctic minke whales, Antarctic krill were more influential than ice krill. The number of Antarctic minke whales increased as the density of Antarctic krill increased to around 1.5 g m −2 . Beyond that, the number of Antarctic minke whales decreased as the density of Antarctic krill increased. High densities of the Antarctic minke whales were estimated along the sea ice edge in the eastern part of the Ross Sea. Specifically, the densities were high in the north of the continental shelf break where low MTEM ‐200 and MSAL ‐200 and intermediate densities of Antarctic krill were observed. Further data collection is needed to investigate interannual variations and trends in their relationship. The results show that the spatial distribution of Antarctic minke whales is a function of longitude, distance from the shelf break, oceanographic condition (temperature and salinity), and densities of ice and Antarctic krill. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Antarctica Balaenoptera bonaerensis Ross Sea Sea ice Wiley Online Library Fisheries Oceanography 22 3 154 173 |
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Wiley Online Library |
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crwiley |
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English |
description |
Abstract The spatial distribution of Antarctic minke whales in the Ross Sea with relation to spatial distributions of their prey – krill – was investigated in this study using generalized additive models ( GAM s). Spatial distributions of two species of krill (ice and Antarctic krill) were estimated by GAM s. Three abiotic factors – distance from the continental shelf break (800 m isobaths), the mean temperature and salinity from the surface to 200 m ( MTEM ‐200 and MSAL ‐200), and latitude and longitude – were used as covariates for models of krill. Estimated spatial distributions of krill were then used with other covariates to model the spatial distribution of Antarctic minke whales. In the selected model of Antarctic minke whales, Antarctic krill were more influential than ice krill. The number of Antarctic minke whales increased as the density of Antarctic krill increased to around 1.5 g m −2 . Beyond that, the number of Antarctic minke whales decreased as the density of Antarctic krill increased. High densities of the Antarctic minke whales were estimated along the sea ice edge in the eastern part of the Ross Sea. Specifically, the densities were high in the north of the continental shelf break where low MTEM ‐200 and MSAL ‐200 and intermediate densities of Antarctic krill were observed. Further data collection is needed to investigate interannual variations and trends in their relationship. The results show that the spatial distribution of Antarctic minke whales is a function of longitude, distance from the shelf break, oceanographic condition (temperature and salinity), and densities of ice and Antarctic krill. |
format |
Article in Journal/Newspaper |
author |
Murase, Hiroto Kitakado, Toshihide Hakamada, Takashi Matsuoka, Koji Nishiwaki, Shigetoshi Naganobu, Mikio |
spellingShingle |
Murase, Hiroto Kitakado, Toshihide Hakamada, Takashi Matsuoka, Koji Nishiwaki, Shigetoshi Naganobu, Mikio Spatial distribution of Antarctic minke whales ( Balaenoptera bonaerensis) in relation to spatial distributions of krill in the Ross Sea, Antarctica |
author_facet |
Murase, Hiroto Kitakado, Toshihide Hakamada, Takashi Matsuoka, Koji Nishiwaki, Shigetoshi Naganobu, Mikio |
author_sort |
Murase, Hiroto |
title |
Spatial distribution of Antarctic minke whales ( Balaenoptera bonaerensis) in relation to spatial distributions of krill in the Ross Sea, Antarctica |
title_short |
Spatial distribution of Antarctic minke whales ( Balaenoptera bonaerensis) in relation to spatial distributions of krill in the Ross Sea, Antarctica |
title_full |
Spatial distribution of Antarctic minke whales ( Balaenoptera bonaerensis) in relation to spatial distributions of krill in the Ross Sea, Antarctica |
title_fullStr |
Spatial distribution of Antarctic minke whales ( Balaenoptera bonaerensis) in relation to spatial distributions of krill in the Ross Sea, Antarctica |
title_full_unstemmed |
Spatial distribution of Antarctic minke whales ( Balaenoptera bonaerensis) in relation to spatial distributions of krill in the Ross Sea, Antarctica |
title_sort |
spatial distribution of antarctic minke whales ( balaenoptera bonaerensis) in relation to spatial distributions of krill in the ross sea, antarctica |
publisher |
Wiley |
publishDate |
2013 |
url |
http://dx.doi.org/10.1111/fog.12011 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Ffog.12011 https://onlinelibrary.wiley.com/doi/pdf/10.1111/fog.12011 |
genre |
Antarc* Antarctic Antarctic Krill Antarctica Balaenoptera bonaerensis Ross Sea Sea ice |
genre_facet |
Antarc* Antarctic Antarctic Krill Antarctica Balaenoptera bonaerensis Ross Sea Sea ice |
op_source |
Fisheries Oceanography volume 22, issue 3, page 154-173 ISSN 1054-6006 1365-2419 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/fog.12011 |
container_title |
Fisheries Oceanography |
container_volume |
22 |
container_issue |
3 |
container_start_page |
154 |
op_container_end_page |
173 |
_version_ |
1810490094111424512 |