Welcome to the Alaska Whale Foundation’s Rapunzel Project! For the past five weeks we have been researching humpback whales (Megaptera novaeangliae) from the newly established Five Finger Lighthouse research station. This historic lighthouse has been the home to a small research team examining the role of humpback whale vocalizations on behavior in the foraging grounds of Fredrick Sound, Alaska. We are hoping to determine what role- if any- humpback whale vocalizations have on the distribution and dispersion of animals across the sound, as well as what vocalizations- again if any- correspond with group fission-fusion events. Additionally, we are hoping to examine what effect anthropogenic noise generated by large vessel traffic has on humpback whale vocalizations and social behavior.
To this end we utilize a theodolite to monitor humpback whale distribution and social behavior across Fredrick Sound from the 18.3 meter tower which dominates the island skyline. From this vantage point we can map out with fine precision where in space and time both whales and vessels are located, where they are traveling, and how they are oriented relative one another. With a hydrophone in the water we can monitor how humpback whale dispersion correlates with the sounds they are generating below and how this appears to change in the presence of vessels.
The lighthouse vantage point allows us to observe humpback whale behavior without inundating the soundscape with research related vessel noise. This effectively allows for us to ‘control’ for quiet periods of observation when vessels are not present in the Sound, and contrast these quiet periods with times when large vessels pass through the area. It also affords us a land-based research station which is less vulnerable to inclement weather and is logistically much simpler than a vessel-based operation.
In addition to looking at the role of vocalization in dispersion, this project seeks to address how social interactions- primarily group formation, group dispersion, and surface behavior- vary across time of day, tide, and in response to vessel traffic. The knowledge of how humpback whales interact across these variables could provide information useful for the prevention of negative interactions with vessels transiting humpback whale foraging grounds. Mitigating negative interactions becomes critical as the both the population of humpback whales and the number of vessels in the water continue to increase.
Our 2011 field season ended on July 7th, and we’re beginning to process data and plan for next summer. Take a look around our blog for more information of what life at the lighthouse is like, who our 2011 research team was, and what our plans are for next year! Feel free to e-mail me any time with questions about the project or to find out how you can get involved with the Alaska Whale Foundation.
Rapunzel Project Field Leader