Chemical, physiological and morphological studies of feral baltic salmon ( Salmo salar) suffering from abnormal fry mortality
Abstract In 1974, abnormally high mortality was recorded among yolk‐sac fry of Baltic salmon ( Salmo salar ) originating from feral females manually stripped and fertilized with milt from feral males. The cause of this mortality, designated M74, is unknown. Our hypothesis is that xenobiotic compound...
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crwiley:10.1002/etc.5620121114 2024-06-02T08:13:59+00:00 Chemical, physiological and morphological studies of feral baltic salmon ( Salmo salar) suffering from abnormal fry mortality Norrgren, L. Andersson, T. Bergqvist, P.‐A. Björklund, I. 1993 http://dx.doi.org/10.1002/etc.5620121114 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fetc.5620121114 https://setac.onlinelibrary.wiley.com/doi/pdf/10.1002/etc.5620121114 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Environmental Toxicology and Chemistry volume 12, issue 11, page 2065-2075 ISSN 0730-7268 1552-8618 journal-article 1993 crwiley https://doi.org/10.1002/etc.5620121114 2024-05-03T11:07:17Z Abstract In 1974, abnormally high mortality was recorded among yolk‐sac fry of Baltic salmon ( Salmo salar ) originating from feral females manually stripped and fertilized with milt from feral males. The cause of this mortality, designated M74, is unknown. Our hypothesis is that xenobiotic compounds responsible for reproduction failure in higher vertebrates in the Baltic Sea also interfere with reproduction in Baltic salmon. The significance of M74 should not be underestimated, because the syndrome has caused up to 75% yearly mortality of developing Baltic salmon yolk‐sac larvae in a fish hatchery dedicated to production of smolt during the last two decades. We cannot exclude the possibility that only a relatively low number of naturally spawned eggs develop normally because of M74. No individual pollutant has been shown to be responsible for the development of M74 syndrome. However, a higher total body burden of organochlorine substances may be responsible for the M74 syndrome. The presence of induced hepatic cytochrome P450 enzymes in both yolk‐sac fry suffering from M74 and adult feral females producing offspring affected by M74 supports this hypothesis. In addition, the P450 enzyme activity in offspring from feral fish is higher than the activity in yolk‐sac fry from hatchery‐raised fish, suggesting that feral Baltic salmon are influenced by organic xenobiotics. Article in Journal/Newspaper Salmo salar Wiley Online Library Environmental Toxicology and Chemistry 12 11 2065 2075 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract In 1974, abnormally high mortality was recorded among yolk‐sac fry of Baltic salmon ( Salmo salar ) originating from feral females manually stripped and fertilized with milt from feral males. The cause of this mortality, designated M74, is unknown. Our hypothesis is that xenobiotic compounds responsible for reproduction failure in higher vertebrates in the Baltic Sea also interfere with reproduction in Baltic salmon. The significance of M74 should not be underestimated, because the syndrome has caused up to 75% yearly mortality of developing Baltic salmon yolk‐sac larvae in a fish hatchery dedicated to production of smolt during the last two decades. We cannot exclude the possibility that only a relatively low number of naturally spawned eggs develop normally because of M74. No individual pollutant has been shown to be responsible for the development of M74 syndrome. However, a higher total body burden of organochlorine substances may be responsible for the M74 syndrome. The presence of induced hepatic cytochrome P450 enzymes in both yolk‐sac fry suffering from M74 and adult feral females producing offspring affected by M74 supports this hypothesis. In addition, the P450 enzyme activity in offspring from feral fish is higher than the activity in yolk‐sac fry from hatchery‐raised fish, suggesting that feral Baltic salmon are influenced by organic xenobiotics. |
format |
Article in Journal/Newspaper |
author |
Norrgren, L. Andersson, T. Bergqvist, P.‐A. Björklund, I. |
spellingShingle |
Norrgren, L. Andersson, T. Bergqvist, P.‐A. Björklund, I. Chemical, physiological and morphological studies of feral baltic salmon ( Salmo salar) suffering from abnormal fry mortality |
author_facet |
Norrgren, L. Andersson, T. Bergqvist, P.‐A. Björklund, I. |
author_sort |
Norrgren, L. |
title |
Chemical, physiological and morphological studies of feral baltic salmon ( Salmo salar) suffering from abnormal fry mortality |
title_short |
Chemical, physiological and morphological studies of feral baltic salmon ( Salmo salar) suffering from abnormal fry mortality |
title_full |
Chemical, physiological and morphological studies of feral baltic salmon ( Salmo salar) suffering from abnormal fry mortality |
title_fullStr |
Chemical, physiological and morphological studies of feral baltic salmon ( Salmo salar) suffering from abnormal fry mortality |
title_full_unstemmed |
Chemical, physiological and morphological studies of feral baltic salmon ( Salmo salar) suffering from abnormal fry mortality |
title_sort |
chemical, physiological and morphological studies of feral baltic salmon ( salmo salar) suffering from abnormal fry mortality |
publisher |
Wiley |
publishDate |
1993 |
url |
http://dx.doi.org/10.1002/etc.5620121114 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fetc.5620121114 https://setac.onlinelibrary.wiley.com/doi/pdf/10.1002/etc.5620121114 |
genre |
Salmo salar |
genre_facet |
Salmo salar |
op_source |
Environmental Toxicology and Chemistry volume 12, issue 11, page 2065-2075 ISSN 0730-7268 1552-8618 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/etc.5620121114 |
container_title |
Environmental Toxicology and Chemistry |
container_volume |
12 |
container_issue |
11 |
container_start_page |
2065 |
op_container_end_page |
2075 |
_version_ |
1800737661171793920 |