• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Published: 2004
• Subjects: bathymetry; elephant seals; environmental variation; generalized additive model; generalized linear model; oceanography; sea surface temperature; Gam; Elephant Seals; Sea ice; Southern Elephant Seals
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.563.7927; http://icesjms.oxfordjournals.org/content/61/6/1014.full.pdf

ow nloaded from surface properties. e ICES Journal of Marine Science, 61: 1014e1027. We examined the relationships between physical oceanography (sea surface temperature e SST, sea surface height anomaly e SSH, ocean colour e OC, bathymetry e BA, sea-ice concentration e SI, and their associated gradients) and the foraging distribution (time at sea) of female southern elephant seals using generalized linear and generalized additive models (GLM and GAM). Using data from 28 separate foraging trips (22 unique individuals) over two years, we found that during the post-lactation trips (summer), the best GLM demonstrated a negative relationship between time at sea and SST and BA, but a positive relationship with SST gradient and SSH. During the post-moult (winter) trips, there was a negative relationship with OC gradient, SSH, and BA. The best post-lactation GAM identified a positive relationship with OC gradient, negative relationships with OC and SST gradient, and a non-linear relationship with SST. For the post-moult trip there was a negative relationship with OC, SST, BA and BA gradient, and a positive relationship with