Seasonal variation in energy intake and condition of harp seals: Is there a harp seal morph? Problems for bioenergetic modelling
Seasonal changes in mass, fat depth, condition index and energy intake were measured in eight captive harp seals (Phoca groenlandica) over a 15‐month period. Two of the five adult females were pregnant but lost their pups before term. There were large shifts in all variables measured. The range of t...
Published in: | Journal of Zoology |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Wiley
1993
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Online Access: | http://dx.doi.org/10.1111/j.1469-7998.1993.tb02703.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1469-7998.1993.tb02703.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1469-7998.1993.tb02703.x https://zslpublications.onlinelibrary.wiley.com/doi/pdf/10.1111/j.1469-7998.1993.tb02703.x |
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crwiley:10.1111/j.1469-7998.1993.tb02703.x 2024-06-02T08:07:48+00:00 Seasonal variation in energy intake and condition of harp seals: Is there a harp seal morph? Problems for bioenergetic modelling Renouf, D. Gales, Rosemary Noseworthy, Elizabeth 1993 http://dx.doi.org/10.1111/j.1469-7998.1993.tb02703.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1469-7998.1993.tb02703.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1469-7998.1993.tb02703.x https://zslpublications.onlinelibrary.wiley.com/doi/pdf/10.1111/j.1469-7998.1993.tb02703.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Zoology volume 230, issue 3, page 513-528 ISSN 0952-8369 1469-7998 journal-article 1993 crwiley https://doi.org/10.1111/j.1469-7998.1993.tb02703.x 2024-05-03T11:41:59Z Seasonal changes in mass, fat depth, condition index and energy intake were measured in eight captive harp seals (Phoca groenlandica) over a 15‐month period. Two of the five adult females were pregnant but lost their pups before term. There were large shifts in all variables measured. The range of these changes in the individual adult animals were for mass, 15–89%, blubber depth 56–240%, and condition index 13–23% (girth x 100)/length. Daily energy consumption varied from as little as 1.16 MJ to as much as 70.97 MJ. The two young males showed larger seasonal changes than the adults. Consistent with our earlier studies of harbour seals (Phoca vitulina) , there was either a significantly negative or no correlation between energy intake and changes in mass or fat. Mass and blubber thickness were positively related in the male seals, however, this was true of the females only during spring and summer. Water and air temperature varied indirectly with changes in blubber thickness in all but two seals. It is proposed that metabolic rate varies seasonally in seals. The implications of these findings are discussed in the light of their impact on bioenergetic modelling. Article in Journal/Newspaper Harp Seal Phoca groenlandica Phoca vitulina Wiley Online Library Journal of Zoology 230 3 513 528 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Seasonal changes in mass, fat depth, condition index and energy intake were measured in eight captive harp seals (Phoca groenlandica) over a 15‐month period. Two of the five adult females were pregnant but lost their pups before term. There were large shifts in all variables measured. The range of these changes in the individual adult animals were for mass, 15–89%, blubber depth 56–240%, and condition index 13–23% (girth x 100)/length. Daily energy consumption varied from as little as 1.16 MJ to as much as 70.97 MJ. The two young males showed larger seasonal changes than the adults. Consistent with our earlier studies of harbour seals (Phoca vitulina) , there was either a significantly negative or no correlation between energy intake and changes in mass or fat. Mass and blubber thickness were positively related in the male seals, however, this was true of the females only during spring and summer. Water and air temperature varied indirectly with changes in blubber thickness in all but two seals. It is proposed that metabolic rate varies seasonally in seals. The implications of these findings are discussed in the light of their impact on bioenergetic modelling. |
format |
Article in Journal/Newspaper |
author |
Renouf, D. Gales, Rosemary Noseworthy, Elizabeth |
spellingShingle |
Renouf, D. Gales, Rosemary Noseworthy, Elizabeth Seasonal variation in energy intake and condition of harp seals: Is there a harp seal morph? Problems for bioenergetic modelling |
author_facet |
Renouf, D. Gales, Rosemary Noseworthy, Elizabeth |
author_sort |
Renouf, D. |
title |
Seasonal variation in energy intake and condition of harp seals: Is there a harp seal morph? Problems for bioenergetic modelling |
title_short |
Seasonal variation in energy intake and condition of harp seals: Is there a harp seal morph? Problems for bioenergetic modelling |
title_full |
Seasonal variation in energy intake and condition of harp seals: Is there a harp seal morph? Problems for bioenergetic modelling |
title_fullStr |
Seasonal variation in energy intake and condition of harp seals: Is there a harp seal morph? Problems for bioenergetic modelling |
title_full_unstemmed |
Seasonal variation in energy intake and condition of harp seals: Is there a harp seal morph? Problems for bioenergetic modelling |
title_sort |
seasonal variation in energy intake and condition of harp seals: is there a harp seal morph? problems for bioenergetic modelling |
publisher |
Wiley |
publishDate |
1993 |
url |
http://dx.doi.org/10.1111/j.1469-7998.1993.tb02703.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1469-7998.1993.tb02703.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1469-7998.1993.tb02703.x https://zslpublications.onlinelibrary.wiley.com/doi/pdf/10.1111/j.1469-7998.1993.tb02703.x |
genre |
Harp Seal Phoca groenlandica Phoca vitulina |
genre_facet |
Harp Seal Phoca groenlandica Phoca vitulina |
op_source |
Journal of Zoology volume 230, issue 3, page 513-528 ISSN 0952-8369 1469-7998 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1469-7998.1993.tb02703.x |
container_title |
Journal of Zoology |
container_volume |
230 |
container_issue |
3 |
container_start_page |
513 |
op_container_end_page |
528 |
_version_ |
1800752936659189760 |