Projects per year
Abstract
The potential impact of exposure to polychlorinated biphenyls (PCBs) on the health and survival of cetaceans continues to be an issue for conservation and management, yet few quantitative approaches for estimating population level effects have been developed. An individual based model (IBM) for assessing effects on both calf survival and immunity was developed and tested. Three case study species (bottlenose dolphin, humpback whale and killer whale) in four populations were taken as examples and the impact of varying levels of PCB uptake on achievable population growth was assessed. The unique aspect of the model is its ability to evaluate likely effects of immunosuppression in addition to calf survival, enabling consequences of PCB exposure on immune function on all age-classes to be explored. By incorporating quantitative tissue concentration-response functions from laboratory animal model species into an IBM framework, population trajectories were generated. Model outputs included estimated concentrations of PCBs in the blubber of females by age, which were then compared to published empirical data. Achievable population growth rates were more affected by the inclusion of effects of PCBs on immunity than on calf survival, but the magnitude depended on the virulence of any subsequent encounter with a pathogen and the proportion of the population exposed. Since the starting population parameters were from historic studies, which may already be impacted by PCBs, the results should be interpreted on a relative rather than an absolute basis. The framework will assist in providing quantitative risk assessments for populations of concern.
Original language | English |
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Pages (from-to) | 407-418 |
Journal | Environmental Pollution |
Volume | 233 |
Early online date | 5 Nov 2017 |
DOIs | |
Publication status | Published - Feb 2018 |
Keywords
- Individual based model
- Risk assessment
- Marine mammal
- Contaminants
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Dive into the research topics of 'Predicting the effects of polychlorinated biphenyls on cetacean populations through impacts on immunity and calf survival'. Together they form a unique fingerprint.Projects
- 2 Finished
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NERC NC National Public Good 2018 - 2023: Sea Mammal Research Unit NC-NPG activities to fulfill NERC's statutory duties.
Sparling, C. E. (PI) & Hall, A. J. (CoI)
1/04/18 → 31/03/23
Project: Standard
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Profiles
Datasets
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Data for: Predicting the effects of polychlorinated biphenyls on cetacean populations through impacts on immunity and calf survival.
Hall, A. J. (Creator), McConnell, B. J. (Creator), Schwacke, L. H. (Creator), Ylitalo, G. M. (Creator), Williams (Robert Williams), R. (Creator) & Rowles, T. K. (Creator), Mendeley Data, 6 Nov 2017
Dataset