Updates from our February/March 2018 Lāna‘i field project

We will be undertaking a 16-day field project off Lāna‘i starting February 20, 2018, funded through a NOAA Species Recovery Grant to the State of Hawai‘i. This will be our first Hawai‘i field effort of 2018, and the start of our 19th year of work in Hawai‘i! This will be our seventh year of working off Maui Nui since first working here in 2000, following on from a very successful field project off Lāna‘i in March 2017. We are based out of Manele Bay for the project, to allow quick access to the deeper water west of Lāna‘i. We have a number of goals for our field work, but the primary one is to learn more about false killer whales, through the deployment of LIMPET satellite tags, photo-identification, and collection of biopsy samples for genetics, hormone chemistry and toxicology. We also have funding for tags from Dolphin Quest, and hope to deploy tags on one or more of short-finned pilot whales, bottlenose dolphins, pantropical spotted dolphins, rough-toothed dolphins, or other species we encounter. As usual, we'll be working with all species of odontocetes we encounter, trying to obtain photos for photo-identification catalogs, and we may also collect biopsy samples for studies of genetics, toxicology, and hormone chemistry of other species.

The research crew for this project will include Daniel Webster, Colin Cornforth and Robin Baird, all from Cascadia, Jordan Lerma from Uheheu, Brittany Guenther, and a number of volunteers. We want to thank Pūlama Lāna‘i for logistical support.

If you want some background information on our work in Hawai‘i we published a paper on our first 13 years of surveys and a pdf is available here

February 23rd update

The first few days of the project have been quite productive, with encounters with bottlenose dolphins, pantropical spotted dolphins, spinner dolphins, short-finned pilot whales, and the highlight of the trip so far, two sei whales. This was our first-ever sighting of sei whales in our work in Hawaiian waters, and the third species of baleen whale we've seen in Hawai‘i. 

Pantropical spotted dolphin, Stenella attenuata, Hawaii, Lanai, dolphin

We've had several encounters with pantropical spotted dolphins over the last few days, but our encounter on February 22nd was quite productive, as we were able to deploy a LIMPET satellite tag on one individual to track their movements. This was only the 2nd spotted dolphin we've tagged in the Maui Nui area, and the 8th we've tagged in Hawai‘i. LIMPET tags on spotted dolphins last an average of 18 days, so we are hoping this tag will give us at least two weeks of movement information. There are three island-associated populations of pantropical spotted dolphins recognized from Hawaiian waters, one off O‘ahu, one off Maui Nui, and one off Hawai‘i Island. The exact boundaries and ranges of these populations are unknown however, and we are trying to determine these through satellite tagging. 

Short-finned pilot whale, Globicephala, Hawaii, Lanai

 Short-finned pilot whales off the west side of Lāna‘i, February 21st, 2018. The group we encountered was relatively small (~15 individuals) and we were able to get good ID photos of most of the individuals present. There is a resident population of short-finned pilot whales that regularly uses the area west of the island.

bottlenose dolphin, Tursiops, Hawaii, Maui

bottlenose dolphin, Hawaii, Maui, Tursiops

On Tuesday February 20th we brought the research vessel from Maui to Lāna‘i, and encountered a group of bottlenose dolphins in the channel. We were able to get good ID photos of most of the individuals present, to compare to our photo-ID catalog of this species.

sei whale, Balaenoptera borealis, Hawaii

Sei whale, Balaenoptera borealis, Hawaii, Lanai

We didn't get any good images of the sei whales we saw on February 21st, but when Colin Cornforth and Shannon Harrison were bringing the research vessel over from Kaua‘i to Maui on February 16th, they encountered three sei whales, so we've included images of one of those individuals here. 

 

Zodiac, Research vessel, Hawaii

The research vessel we'll be using for this project, a 24' Hurricane. Photo by Galen Craddock.

tracklines, survey effort, Hawaii, Maui, Lanai, whale, dolphin

Our survey effort off Maui Nui in previous years (2000, 2001, 2002, 2003, 2012, 2017).

Photos taken NMFS Scientific Research Permits. All photos are copyrighted and should not be used without permission (contact Robin Baird at rwbaird (at) cascadiaresearch.org for permission).

Updates from our previous field projects can be found here.

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