Physiological flexibility: the key to success and survival for Antarctic fairy shrimps in highly fluctuating extreme environments
Summary 1. The anostracan fairy shrimp Branchinecta gaini inhabits one of the most hostile environments on earth, living in pools and lakes in Antarctica. Between January 2002 and January 2003 temperatures in two pools where B. gaini are extremely abundant on Adelaide Island ranged from −18.6 to −15...
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crwiley:10.1111/j.1365-2427.2004.01264.x 2024-06-02T07:54:19+00:00 Physiological flexibility: the key to success and survival for Antarctic fairy shrimps in highly fluctuating extreme environments Peck, Lloyd S. 2004 http://dx.doi.org/10.1111/j.1365-2427.2004.01264.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2427.2004.01264.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2427.2004.01264.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Freshwater Biology volume 49, issue 9, page 1195-1205 ISSN 0046-5070 1365-2427 journal-article 2004 crwiley https://doi.org/10.1111/j.1365-2427.2004.01264.x 2024-05-03T10:50:04Z Summary 1. The anostracan fairy shrimp Branchinecta gaini inhabits one of the most hostile environments on earth, living in pools and lakes in Antarctica. Between January 2002 and January 2003 temperatures in two pools where B. gaini are extremely abundant on Adelaide Island ranged from −18.6 to −15.7 °C in winter, to 19.4 to 17.1 °C in summer, whilst air temperatures ranged from −34 to 6.3 °C. 2. Branchinecta gaini survives winter as cysts, but endures large summer temperature fluctuations as adults. Cysts froze between −24.4 and −25.7 °C. In experiments adults survived 0–10 °C with no mortality for 1 week, 25 °C for nearly 48 h with 50% mortality, and at 32 °C complete mortality occurred in <1 h. 3. Oxygen consumption (ṀO 2 ) in B. gaini approximately doubled for every 10 °C temperature rise ( Q 10 = 2.04) up to 20 °C where it reached a peak. Females had, on average 19% higher ṀO 2 than males. Females also had greater metabolic scopes, (maximum–minimum ṀO 2 across temperatures was ×3.6 for females, ×3.1 for males). 4. Ventilation frequency increased linearly with temperature, and did not decline at 25 °C, indicating animals were ‘trying’ progressively harder to supply oxygen to tissues, and oxygen deficiency was the probable cause of death. Females had a higher ventilation frequency than males (8.6–17.1% higher) and they also exhibited greater scope to raise ventilation frequency (×2.4 for females versus ×1.5 for males). 5. Great metabolic flexibility allows B. gaini to exploit extreme, highly fluctuating environments, and larger ventilatory and respiratory scopes allow females to survive higher temperatures than males. Because of this flexibility their prospects for coping with physical environmental change are high. Article in Journal/Newspaper Adelaide Island Antarc* Antarctic Antarctica Wiley Online Library Adelaide Island ENVELOPE(-68.914,-68.914,-67.762,-67.762) Antarctic Freshwater Biology 49 9 1195 1205 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Summary 1. The anostracan fairy shrimp Branchinecta gaini inhabits one of the most hostile environments on earth, living in pools and lakes in Antarctica. Between January 2002 and January 2003 temperatures in two pools where B. gaini are extremely abundant on Adelaide Island ranged from −18.6 to −15.7 °C in winter, to 19.4 to 17.1 °C in summer, whilst air temperatures ranged from −34 to 6.3 °C. 2. Branchinecta gaini survives winter as cysts, but endures large summer temperature fluctuations as adults. Cysts froze between −24.4 and −25.7 °C. In experiments adults survived 0–10 °C with no mortality for 1 week, 25 °C for nearly 48 h with 50% mortality, and at 32 °C complete mortality occurred in <1 h. 3. Oxygen consumption (ṀO 2 ) in B. gaini approximately doubled for every 10 °C temperature rise ( Q 10 = 2.04) up to 20 °C where it reached a peak. Females had, on average 19% higher ṀO 2 than males. Females also had greater metabolic scopes, (maximum–minimum ṀO 2 across temperatures was ×3.6 for females, ×3.1 for males). 4. Ventilation frequency increased linearly with temperature, and did not decline at 25 °C, indicating animals were ‘trying’ progressively harder to supply oxygen to tissues, and oxygen deficiency was the probable cause of death. Females had a higher ventilation frequency than males (8.6–17.1% higher) and they also exhibited greater scope to raise ventilation frequency (×2.4 for females versus ×1.5 for males). 5. Great metabolic flexibility allows B. gaini to exploit extreme, highly fluctuating environments, and larger ventilatory and respiratory scopes allow females to survive higher temperatures than males. Because of this flexibility their prospects for coping with physical environmental change are high. |
format |
Article in Journal/Newspaper |
author |
Peck, Lloyd S. |
spellingShingle |
Peck, Lloyd S. Physiological flexibility: the key to success and survival for Antarctic fairy shrimps in highly fluctuating extreme environments |
author_facet |
Peck, Lloyd S. |
author_sort |
Peck, Lloyd S. |
title |
Physiological flexibility: the key to success and survival for Antarctic fairy shrimps in highly fluctuating extreme environments |
title_short |
Physiological flexibility: the key to success and survival for Antarctic fairy shrimps in highly fluctuating extreme environments |
title_full |
Physiological flexibility: the key to success and survival for Antarctic fairy shrimps in highly fluctuating extreme environments |
title_fullStr |
Physiological flexibility: the key to success and survival for Antarctic fairy shrimps in highly fluctuating extreme environments |
title_full_unstemmed |
Physiological flexibility: the key to success and survival for Antarctic fairy shrimps in highly fluctuating extreme environments |
title_sort |
physiological flexibility: the key to success and survival for antarctic fairy shrimps in highly fluctuating extreme environments |
publisher |
Wiley |
publishDate |
2004 |
url |
http://dx.doi.org/10.1111/j.1365-2427.2004.01264.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2427.2004.01264.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2427.2004.01264.x |
long_lat |
ENVELOPE(-68.914,-68.914,-67.762,-67.762) |
geographic |
Adelaide Island Antarctic |
geographic_facet |
Adelaide Island Antarctic |
genre |
Adelaide Island Antarc* Antarctic Antarctica |
genre_facet |
Adelaide Island Antarc* Antarctic Antarctica |
op_source |
Freshwater Biology volume 49, issue 9, page 1195-1205 ISSN 0046-5070 1365-2427 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-2427.2004.01264.x |
container_title |
Freshwater Biology |
container_volume |
49 |
container_issue |
9 |
container_start_page |
1195 |
op_container_end_page |
1205 |
_version_ |
1800752470005121024 |