1
|
Fernández-Míguez M, Puvanendran V, Burgerhout E, Presa P, Tveiten H, Vorkamp K, Hansen ØJ, Johansson GS, Bogevik AS. Effects of weathered polyethylene microplastic ingestion on sexual maturation, fecundity and egg quality in maturing broodstock Atlantic cod Gadus morhua. Environ Pollut 2023; 320:121053. [PMID: 36632969 DOI: 10.1016/j.envpol.2023.121053] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 01/06/2023] [Accepted: 01/07/2023] [Indexed: 06/17/2023]
Abstract
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.
Collapse
Affiliation(s)
- M Fernández-Míguez
- Instituto de Investigaciones Marinas, CSIC, Vigo, Spain; Laboratory of Marine Genetic Resources, CIM-Universidad de Vigo, Spain
| | | | | | - P Presa
- Laboratory of Marine Genetic Resources, CIM-Universidad de Vigo, Spain
| | - H Tveiten
- Nofima AS, Norway; UiT The Arctic University of Norway, Tromsø, Norway
| | - K Vorkamp
- Aarhus University, Department of Environmental Science, Roskilde, Denmark
| | | | | | | |
Collapse
|
2
|
Stiasny MH, Mittermayer FH, Göttler G, Bridges CR, Falk-Petersen IB, Puvanendran V, Mortensen A, Reusch TBH, Clemmesen C. Effects of parental acclimation and energy limitation in response to high CO 2 exposure in Atlantic cod. Sci Rep 2018; 8:8348. [PMID: 29844541 PMCID: PMC5974321 DOI: 10.1038/s41598-018-26711-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Accepted: 05/18/2018] [Indexed: 12/20/2022] Open
Abstract
Ocean acidification (OA), the dissolution of excess anthropogenic carbon dioxide in ocean waters, is a potential stressor to many marine fish species. Whether species have the potential to acclimate and adapt to changes in the seawater carbonate chemistry is still largely unanswered. Simulation experiments across several generations are challenging for large commercially exploited species because of their long generation times. For Atlantic cod (Gadus morhua), we present first data on the effects of parental acclimation to elevated aquatic CO2 on larval survival, a fundamental parameter determining population recruitment. The parental generation in this study was exposed to either ambient or elevated aquatic CO2 levels simulating end-of-century OA levels (~1100 µatm CO2) for six weeks prior to spawning. Upon fully reciprocal exposure of the F1 generation, we quantified larval survival, combined with two larval feeding regimes in order to investigate the potential effect of energy limitation. We found a significant reduction in larval survival at elevated CO2 that was partly compensated by parental acclimation to the same CO2 exposure. Such compensation was only observed in the treatment with high food availability. This complex 3-way interaction indicates that surplus metabolic resources need to be available to allow a transgenerational alleviation response to ocean acidification.
Collapse
Affiliation(s)
- M H Stiasny
- GEOMAR Helmholtz Centre for Ocean Research Kiel, Evolutionary Ecology of Marine Fishes, Düsternbrooker Weg 20, 24105, Kiel, Germany.,University of Kiel, Department of Economics, Wilhelm-Seelig-Platz 1, 24118, Kiel, Germany
| | - F H Mittermayer
- GEOMAR Helmholtz Centre for Ocean Research Kiel, Evolutionary Ecology of Marine Fishes, Düsternbrooker Weg 20, 24105, Kiel, Germany
| | - G Göttler
- Heinrich-Heine Universität Düsseldorf, Institute of Metabolic Physiology, 40225, Düsseldorf, Germany
| | - C R Bridges
- Heinrich-Heine Universität Düsseldorf, Institute of Metabolic Physiology, 40225, Düsseldorf, Germany
| | - I-B Falk-Petersen
- University of Tromsø, Faculty of Biosciences, Fisheries and Economics, Tromsø, Norway
| | | | - A Mortensen
- Nofima AS, Postboks 6122, NO-9291, Tromsø, Norway
| | - T B H Reusch
- GEOMAR Helmholtz Centre for Ocean Research Kiel, Evolutionary Ecology of Marine Fishes, Düsternbrooker Weg 20, 24105, Kiel, Germany
| | - C Clemmesen
- GEOMAR Helmholtz Centre for Ocean Research Kiel, Evolutionary Ecology of Marine Fishes, Düsternbrooker Weg 20, 24105, Kiel, Germany.
| |
Collapse
|
3
|
Gopalakrishnan A, Maran BAV, Puvanendran V, Rajkumar M, Balasubramanian T, Ferguson HW. Neoplasia in the Indian oil sardine, Sardinella longiceps (Valenciennes), and the great barracuda, Sphyraena barracuda (Edwards), from the south-east coast of India. J Fish Dis 2011; 34:881-885. [PMID: 21988360 DOI: 10.1111/j.1365-2761.2011.01299.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Affiliation(s)
- A Gopalakrishnan
- Centre of Advanced Study in Marine Biology, Annamalai University, Parangipettai, Tamil Nadu, India
| | | | | | | | | | | |
Collapse
|
4
|
Abstract
In spite of a tremendous amount of research on Atlantic cod (Gadus morhua) larvae, no information is available on the development of foraging behaviour over an extended period. We investigated the ontogeny of foraging behaviour of Atlantic cod larvae exposed to different prey concentrations from hatching to metamorphosis. The objective of this work was to determine if their foraging behaviour is influenced by prey concentration. Rotifers and (or) Artemia sp. were used as prey at concentrations of 0, 500, 1000, 2000, and 4000/L. During behavioural observations, which were carried out twice a week, foraging behaviour and activity of cod larvae were quantified. Larvae were sampled once a week and standard length and gut fullness were recorded. Larvae reared at concentrations of 1000 and 2000 prey/L swam significantly more but foraged (quantified by capture success) significantly less than the larvae reared at 4000 prey/L. Larvae reared at 4000 prey/L performed more orientations towards prey than larvae reared at all lower prey concentrations and the time spent per orientation increased from day 2 at all prey concentrations but declined as the larvae grew. However, this decline occurred earlier in larvae reared at 4000 prey/L than in larvae reared at other prey concentrations, and larvae reared at 4000 prey/L spent the shortest time per orientation at day 27 compared with day 34. Larvae reared at 4000 prey/L showed significantly higher success in capturing prey than larvae reared at all lower prey concentrations. After day 13 post hatch, larvae reared at 4000 prey/L were significantly greater in length than larvae reared at all other prey concentrations. Larvae reared at 0, 500, and 1000 prey/L did not survive beyond 11, 15, and 32 days, respectively, indicating that fewer than 2000 prey/L may not be adequate to keep cod larvae alive during intensive rearing. Our results suggest that the foraging behaviour of Atlantic cod larvae is influenced by prey concentration.
Collapse
|