Gulf Apex Predator-Prey Project
The goal of the Gulf Apex Predator-Prey Project (GAP) is to better understand predator-prey interactions in the western Gulf of Alaska as they relate to the decline of the western stock of Steller sea lions.
This website was created for laypeople and scientists alike. We invite you to explore the site to learn about the wide variety of GAP projects and how they have evolved since GAP began in 1999. Here you will find detailed information on the integrated components of GAP, including the suite of species and methodologies that have been used to explore the Kodiak marine ecosystem.
We are pleased to announce the publication of the following article:
Witteveen, B.H., A. De Robertis, L. Guo, and K.M. Wynne. 2014. Using dive behavior and active acoustics to assess prey partitioning by fin and humpback whales near Kodiak Island, Alaska. Marine Mammal Science. DOI:10.1111/12158.
This article describes prey use and potential prey partitioning between fin and humpback whales by combining analysis of vertical whale distribution obtained from tagged individual whales with concurrent assessment of pelagic prey.
Kodiak Area Marine Science Symposium
GAP research was very well represented at the second tri-annual Kodiak Area Marine Science Symposium
- Dr. Lei Guo presented “Not All Waters Were Created Equal – Not Even Close: Spatial Variation in Consumption by Groundfishes in the Kodiak Area” [pdf; 1.43mb]
- Dr. Bree Witteveen presented “Whales as Sentinels in a Changing Marine Environment in the Gulf of Alaska” [pdf; 3.4mb]
- Kate Wynne presented “Whale Bycatch Reduction: What’s NOT to Love about Pingers?” [pdf; 1.31mb].
- Graduate student Dana Wright presented “Modeling the Diet of Kodiak Humpback Whales, Megaptera novaeangliae: Implications for Marine Predators and Commercial Fisheries near Kodiak, Alaska.” [pdf; 443kb]
Alaska Marine Science Symposium
- GAP graduate student Dana Wright won an award for her poster presentation outlining the importance of basal food web isotopes in trophic ecology studies illustrated through a case study of Kodiak humpback whales and weathervane scallops
- Bree Witteveen presented GAP research on seasonal variability of prey and whale distribution around the Kodiak Archipelago.