Effects of reduced oxygen level on the mortality and hatching rate of Chondrostoma nasus embryos
Exposure of embryos of Chondrostoma nasus to a strongly reduced oxygen content (about 10% of air saturation) enhanced mortality and depressed hatching success. Viable larvae hatched only from the controls and from the group exposed to reduced oxygen during the earliest embryogenesis (from fertilizat...
Published in: | Journal of Fish Biology |
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Language: | English |
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Online Access: | http://dx.doi.org/10.1111/j.1095-8649.1996.tb00039.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1996.tb00039.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1996.tb00039.x |
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crwiley:10.1111/j.1095-8649.1996.tb00039.x 2024-06-02T08:10:12+00:00 Effects of reduced oxygen level on the mortality and hatching rate of Chondrostoma nasus embryos Keckeis, H. Bauer‐Nemeschkal, E. Kamler, E. 1996 http://dx.doi.org/10.1111/j.1095-8649.1996.tb00039.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1996.tb00039.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1996.tb00039.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Fish Biology volume 49, issue 3, page 430-440 ISSN 0022-1112 1095-8649 journal-article 1996 crwiley https://doi.org/10.1111/j.1095-8649.1996.tb00039.x 2024-05-03T11:18:04Z Exposure of embryos of Chondrostoma nasus to a strongly reduced oxygen content (about 10% of air saturation) enhanced mortality and depressed hatching success. Viable larvae hatched only from the controls and from the group exposed to reduced oxygen during the earliest embryogenesis (from fertilization to gastrula). In the groups exposed from gastrula to eyed stage and from eyed stage to hatching, a high percentage of fish hatched, but all were deformed and almost all died during the following 1–5 days. Hatching period was prolonged in the groups exposed to reduced oxygen content. At a spawning area C. nasus had deposited a large portion of eggs in areas of reduced oxygen content. On the other hand, eggs placed at the substratum surface were exposed to high predation pressure from Barbus barbus, Lota lota and ducks ( Anas platyrhynchos ). The trade‐off between predation pressure at the substratum surface and reduced oxygen conditions in the interstices resulted in a narrow space for successful development of embryos of this endangered rheophilic fish species under natural conditions. Article in Journal/Newspaper Lota lota lota Wiley Online Library Journal of Fish Biology 49 3 430 440 |
institution |
Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
Exposure of embryos of Chondrostoma nasus to a strongly reduced oxygen content (about 10% of air saturation) enhanced mortality and depressed hatching success. Viable larvae hatched only from the controls and from the group exposed to reduced oxygen during the earliest embryogenesis (from fertilization to gastrula). In the groups exposed from gastrula to eyed stage and from eyed stage to hatching, a high percentage of fish hatched, but all were deformed and almost all died during the following 1–5 days. Hatching period was prolonged in the groups exposed to reduced oxygen content. At a spawning area C. nasus had deposited a large portion of eggs in areas of reduced oxygen content. On the other hand, eggs placed at the substratum surface were exposed to high predation pressure from Barbus barbus, Lota lota and ducks ( Anas platyrhynchos ). The trade‐off between predation pressure at the substratum surface and reduced oxygen conditions in the interstices resulted in a narrow space for successful development of embryos of this endangered rheophilic fish species under natural conditions. |
format |
Article in Journal/Newspaper |
author |
Keckeis, H. Bauer‐Nemeschkal, E. Kamler, E. |
spellingShingle |
Keckeis, H. Bauer‐Nemeschkal, E. Kamler, E. Effects of reduced oxygen level on the mortality and hatching rate of Chondrostoma nasus embryos |
author_facet |
Keckeis, H. Bauer‐Nemeschkal, E. Kamler, E. |
author_sort |
Keckeis, H. |
title |
Effects of reduced oxygen level on the mortality and hatching rate of Chondrostoma nasus embryos |
title_short |
Effects of reduced oxygen level on the mortality and hatching rate of Chondrostoma nasus embryos |
title_full |
Effects of reduced oxygen level on the mortality and hatching rate of Chondrostoma nasus embryos |
title_fullStr |
Effects of reduced oxygen level on the mortality and hatching rate of Chondrostoma nasus embryos |
title_full_unstemmed |
Effects of reduced oxygen level on the mortality and hatching rate of Chondrostoma nasus embryos |
title_sort |
effects of reduced oxygen level on the mortality and hatching rate of chondrostoma nasus embryos |
publisher |
Wiley |
publishDate |
1996 |
url |
http://dx.doi.org/10.1111/j.1095-8649.1996.tb00039.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1996.tb00039.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1996.tb00039.x |
genre |
Lota lota lota |
genre_facet |
Lota lota lota |
op_source |
Journal of Fish Biology volume 49, issue 3, page 430-440 ISSN 0022-1112 1095-8649 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1095-8649.1996.tb00039.x |
container_title |
Journal of Fish Biology |
container_volume |
49 |
container_issue |
3 |
container_start_page |
430 |
op_container_end_page |
440 |
_version_ |
1800756026146816000 |