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 use and partitioning by fin and humpback whales near Kodiak Island, Alaska. Marine Mammal Science 31(1): 255–278. http://doi.org/10.1111/mms.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 triennial Kodiak Area Marine Science Symposium
- Lei Guo presented “Not All Waters Were Created Equal – Not Even Close: Spatial Variation in Consumption by Groundfishes in the Kodiak Area” [PDF; 1.43 MB]
- Bree Witteveen presented “Whales as Sentinels in a Changing Marine Environment in the Gulf of Alaska” [PDF; 3.4 MB]
- Kate Wynne presented “Whale Bycatch Reduction: What’s NOT to Love about Pingers?” [PDF; 1.31 MB].
- 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; 443 KB]
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.
Dead humpback whale washes ashore near Kodiak
Bree Witteveen examined a dead male humpback whale that likely was the victim of a killer whale attack.
The Baranov Museums hosts “Thar She Blows!”
Kodiak’s own Baranov Museum hosted Bree Witteveen as she summarized 12 years of whale research around the Emerald Island. The talk was a free event open to the public made possible by a grant from the National Park Foundation.
GAP completes 2012 vessel-based surveys
GAP researchers completed 15 days of vessel based surveys throughout the Kodiak archipelago. The purpose of these surveys was to document whale distribution and relative abundance while concurrently documenting prey availability through hydroacoustics and oceanographic conditions using CTD casts. Kate Wynne and Bree Witteveen led the whale component of these surveys and collected photographs and biopsy samples of individual fin and humpback whales. The prey assessment and oceanographic component of the surveys were led by Lei Guo. While the researchers hoped to tag whales as well, weather conditions did not allow for this to occur. These surveys will continue in 2013.
GAP whale research featured on KMXT
Kate Wynne and Bree Witteveen present at the University of Alaska Fairbanks’ Land and Sea Lecture Series
Right whale sighting
Extremely rare sighting of a right whale in Kodiak waters.
Whale tagged with acoustic/ultrasonic recorder
GAP researchers tagged a humpback whale with three-dimensional Acousonde tag to assess behavioral reactions to acoustic deterrents.