Publication - Research and analysis

Feasibility of extending SeabORD to the entire breeding season: study

Published: 30 June 2022
Directorate: Marine Directorate
Part of: Energy, Environment and climate change, Marine and fisheries
ISBN: 9781804352267

SeabORD is a method that can assess displacement and barrier effects from offshore renewables on seabirds, but is currently limited to four species during the chick-rearing season. This review examined ways to improve the SeabORD model including extending to the entire breeding season.

Marine publications

Supporting documents

Appendix C: Structure of the models used in Daunt et al. (2020)

In Daunt et al. (2020) survival probability for an individual bird, indexed by i, of a particular species with standardised mass X_i at the end of the breeding season of year k was modelled using the equation

(Equation 5)

in which the parameters parameters Mathematical Equation , and define a quadratic regression pseudo-age (years since first observed successful breeding), the parameter defines the effect of variation in (standardised) bird-specific mass X_i, and Q_k encapsulates all year-specific effects in a single term. Note that Daunt et al 2018 actually index year by the letter j, but as j is used for scenario (synonymous with run) in this chapter, we have used the letter k for year instead.