Effects of weathered polyethylene microplastic ingestion on sexual maturation, fecundity and egg quality in maturing broodstock Atlantic cod Gadus morhua
Microplastics (MPs) have become a global issue as they are omnipresent in the ocean. Fish ingesting MPs through feed could be affected in their physiological function, e.g., disrupted enzyme production and function, reduction of feeding and reproductive failure. This study assessed the effects of fe...
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Online Access: | https://hdl.handle.net/10037/29020 https://doi.org/10.1016/j.envpol.2023.121053 |
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ftunivtroemsoe:oai:munin.uit.no:10037/29020 2023-06-11T04:10:09+02:00 Effects of weathered polyethylene microplastic ingestion on sexual maturation, fecundity and egg quality in maturing broodstock Atlantic cod Gadus morhua Fernández-Míguez, Maria Puvanendran, Velmurugu Burgerhout, Erik Presa, Pablo Tveiten, Helge Vorkamp, Katrin Hansen, Øyvind J Johansson, Gunhild Seljehaug Bogevik, André Sture 2023-01-09 https://hdl.handle.net/10037/29020 https://doi.org/10.1016/j.envpol.2023.121053 eng eng Elsevier Environmental Pollution (1987) Fernández-Míguez, Puvanendran, Burgerhout, Presa, Tveiten, Vorkamp, Hansen, Johansson, Bogevik. Effects of weathered polyethylene microplastic ingestion on sexual maturation, fecundity and egg quality in maturing broodstock Atlantic cod Gadus morhua. Environmental Pollution. 2023;320:1-12 FRIDAID 2127507 doi:10.1016/j.envpol.2023.121053 0269-7491 1873-6424 https://hdl.handle.net/10037/29020 Attribution 4.0 International (CC BY 4.0) openAccess Copyright 2023 The Author(s) https://creativecommons.org/licenses/by/4.0 Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2023 ftunivtroemsoe https://doi.org/10.1016/j.envpol.2023.121053 2023-04-26T23:05:56Z Microplastics (MPs) have become a global issue as they are omnipresent in the ocean. Fish ingesting MPs through feed could be affected in their physiological function, e.g., disrupted enzyme production and function, reduction of feeding and reproductive failure. This study assessed the effects of feed containing naturally weathered MPs from the Oslofjord (Norway) on the reproductive physiology of Atlantic cod (Gadus morhua). Farmed cod broodstock were fed either control (C-diet) or feeds containing 1% microplastic (MP-diet) starting nine months prior to spawning, from June until May. No major differences were found between diet groups in overall biometrics or gonad histology. Sex steroid levels (testosterone, 11-ketotestosterone and 17β-estradiol) resulted in expected profiles increasing over time without any significant differences between treatments. Gene expression levels of the steroidogenic enzyme 20β-hydroxysteroid dehydrogenase (20β-hsd) and vitellogenin1 (vtg1) showed significant differences between dietary treatments with lower expression in the control group. This can be a direct effect of MPs, but endocrine disrupting effects of potentially leachable plastic additives cannot be completely ruled out. Thus, these enzymes could be indicators of exposure to contaminants that disrupt sexual maturation by affecting the production of primarily maturation-inducing steroid. Although the concentration of MPs employed in this study may not be high enough to elicit any observable short-term biological effects, the observed gene expression suggests that long-term consequences should be considered caused by an expected increase of MPs in marine environments. Article in Journal/Newspaper atlantic cod Gadus morhua University of Tromsø: Munin Open Research Archive Norway Environmental Pollution 320 121053 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
description |
Microplastics (MPs) have become a global issue as they are omnipresent in the ocean. Fish ingesting MPs through feed could be affected in their physiological function, e.g., disrupted enzyme production and function, reduction of feeding and reproductive failure. This study assessed the effects of feed containing naturally weathered MPs from the Oslofjord (Norway) on the reproductive physiology of Atlantic cod (Gadus morhua). Farmed cod broodstock were fed either control (C-diet) or feeds containing 1% microplastic (MP-diet) starting nine months prior to spawning, from June until May. No major differences were found between diet groups in overall biometrics or gonad histology. Sex steroid levels (testosterone, 11-ketotestosterone and 17β-estradiol) resulted in expected profiles increasing over time without any significant differences between treatments. Gene expression levels of the steroidogenic enzyme 20β-hydroxysteroid dehydrogenase (20β-hsd) and vitellogenin1 (vtg1) showed significant differences between dietary treatments with lower expression in the control group. This can be a direct effect of MPs, but endocrine disrupting effects of potentially leachable plastic additives cannot be completely ruled out. Thus, these enzymes could be indicators of exposure to contaminants that disrupt sexual maturation by affecting the production of primarily maturation-inducing steroid. Although the concentration of MPs employed in this study may not be high enough to elicit any observable short-term biological effects, the observed gene expression suggests that long-term consequences should be considered caused by an expected increase of MPs in marine environments. |
format |
Article in Journal/Newspaper |
author |
Fernández-Míguez, Maria Puvanendran, Velmurugu Burgerhout, Erik Presa, Pablo Tveiten, Helge Vorkamp, Katrin Hansen, Øyvind J Johansson, Gunhild Seljehaug Bogevik, André Sture |
spellingShingle |
Fernández-Míguez, Maria Puvanendran, Velmurugu Burgerhout, Erik Presa, Pablo Tveiten, Helge Vorkamp, Katrin Hansen, Øyvind J Johansson, Gunhild Seljehaug Bogevik, André Sture Effects of weathered polyethylene microplastic ingestion on sexual maturation, fecundity and egg quality in maturing broodstock Atlantic cod Gadus morhua |
author_facet |
Fernández-Míguez, Maria Puvanendran, Velmurugu Burgerhout, Erik Presa, Pablo Tveiten, Helge Vorkamp, Katrin Hansen, Øyvind J Johansson, Gunhild Seljehaug Bogevik, André Sture |
author_sort |
Fernández-Míguez, Maria |
title |
Effects of weathered polyethylene microplastic ingestion on sexual maturation, fecundity and egg quality in maturing broodstock Atlantic cod Gadus morhua |
title_short |
Effects of weathered polyethylene microplastic ingestion on sexual maturation, fecundity and egg quality in maturing broodstock Atlantic cod Gadus morhua |
title_full |
Effects of weathered polyethylene microplastic ingestion on sexual maturation, fecundity and egg quality in maturing broodstock Atlantic cod Gadus morhua |
title_fullStr |
Effects of weathered polyethylene microplastic ingestion on sexual maturation, fecundity and egg quality in maturing broodstock Atlantic cod Gadus morhua |
title_full_unstemmed |
Effects of weathered polyethylene microplastic ingestion on sexual maturation, fecundity and egg quality in maturing broodstock Atlantic cod Gadus morhua |
title_sort |
effects of weathered polyethylene microplastic ingestion on sexual maturation, fecundity and egg quality in maturing broodstock atlantic cod gadus morhua |
publisher |
Elsevier |
publishDate |
2023 |
url |
https://hdl.handle.net/10037/29020 https://doi.org/10.1016/j.envpol.2023.121053 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_relation |
Environmental Pollution (1987) Fernández-Míguez, Puvanendran, Burgerhout, Presa, Tveiten, Vorkamp, Hansen, Johansson, Bogevik. Effects of weathered polyethylene microplastic ingestion on sexual maturation, fecundity and egg quality in maturing broodstock Atlantic cod Gadus morhua. Environmental Pollution. 2023;320:1-12 FRIDAID 2127507 doi:10.1016/j.envpol.2023.121053 0269-7491 1873-6424 https://hdl.handle.net/10037/29020 |
op_rights |
Attribution 4.0 International (CC BY 4.0) openAccess Copyright 2023 The Author(s) https://creativecommons.org/licenses/by/4.0 |
op_doi |
https://doi.org/10.1016/j.envpol.2023.121053 |
container_title |
Environmental Pollution |
container_volume |
320 |
container_start_page |
121053 |
_version_ |
1768384416105627648 |