Academic Journal
Deep-ocean predation by a high Arctic cetacean
| العنوان: | Deep-ocean predation by a high Arctic cetacean |
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| المؤلفون: | Laidre, K.L., Heide-Jørgensen, M.P., Jørgensen, O.A., Treble, M.A. |
| المصدر: | ICES Journal of Marine Science ; volume 61, issue 3, page 430-440 ; ISSN 1095-9289 1054-3139 |
| بيانات النشر: | Oxford University Press (OUP) |
| سنة النشر: | 2004 |
| مصطلحات موضوعية: | Ecology, Aquatic Science, Ecology, Evolution, Behavior and Systematics, Oceanography |
| الوصف: | A bioenergetic model for two narwhal (Monodon monoceros) sub-populations was developed to quantify daily gross energy requirements and estimate the biomass of Greenland halibut (Reinhardtius hippoglossoides) needed to sustain the sub-populations for their 5-month stay on wintering grounds in Baffin Bay. Whales in two separate wintering grounds were estimated to require 700 tonnes (s.e. 300) and 90 tonnes (s.e. 40) of Greenland halibut per day, assuming a diet of 50% Greenland halibut. Mean densities and length distributions of Greenland halibut inside and outside of the narwhal wintering grounds were correlated with predicted whale predation levels based on diving behavior. The difference in Greenland halibut biomass between an area with high predation and a comparable area without whales, approximately 19 000 tonnes, corresponded well with the predicted biomass removed by the narwhal sub-population on a diet of 50–75% Greenland halibut. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| DOI: | 10.1016/j.icesjms.2004.02.002 |
| الاتاحة: | http://dx.doi.org/10.1016/j.icesjms.2004.02.002 http://academic.oup.com/icesjms/article-pdf/61/3/430/29160387/61-3-430.pdf |
| رقم الانضمام: | edsbas.E00A94B5 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1016/j.icesjms.2004.02.002 |
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