1/20/11

The lines that bind right whales

Entanglements in fixed fishing gear continues to be a serious concern for this small, endangered right whale population.


Scientists from NOAA Fisheries Service approaching a young North Atlantic right whale they disentangled on January 15 off the coast of Cape Canaveral, FL. Photo via NOAA, credit: With permission from EcoHealth Alliance.

Over the course of the past five months, three right whales have been seen carrying gear: Catalog #1503, a reproductive female who was seen one day in September on Jeffreys Ledge with rope entangling her head; Catalog #3120, a male born in 2001 who was also seen on Jeffreys Ledge in October entangled in gillnetting either in mouth or around flippers (this animal also suffered a serious entanglement in 2002) and the most recent case, a two year old female, the 2009 calf of Catalog #2611.

She was sighted on Christmas Day down in the southeast U.S. severely entangled with gear through her mouth and around her flippers and trailing behind the body. The first animal has not been resighted and the second animal has only been sighted far from shore so no disentanglement attempts could be mounted and their fate is uncertain.


Scientists from NOAA Fisheries Service and its state and nonprofit partners successfully used at-sea chemical sedation to help cut the remaining ropes from a young North Atlantic right whale on January 15 off the coast of Cape Canaveral, Fla. The sedative given to the whale allowed the disentanglement team to safely approach the animal and remove 50 feet of rope which was wrapped through its mouth and around its flippers. Photo via NOAA, credit: with permission from Florida Fish and Wildlife Conservation Commission

The third animal was recently the focus of a complex sedation and disentanglement effort detailed in this press release from NOAA.


Disentangled right whale off the coast of Cape Canaveral, Fla. on January 15. Photo via NOAA, credit: with permission from EcoHealth Alliance

We don't yet know if this two year old will survive. She is very thin and sustained injuries from her entanglement and may have gear still remaining on her flippers. But the monumental efforts taken to free her using all tools available underscores the need to first, try to save all right whales in imminent danger of dying from human activities, and second, to quickly and effectively put changes in place that will eliminate these dangers. Both of these are challenging to accomplish but there is a concerted effort on several fronts to do so.

Here is a short video of those monumental disentanglement efforts on the open seas.
Scientists from NOAA Fisheries Service and its state and nonprofit partners successfully used a long pole with attached knife and buoy to help cut the remaining ropes from a young sedated North Atlantic right whale on January 15 off the coast of Cape Canaveral, Fla.Video via NOAA, credit: with permission from Georgia Department of Natural Resource

12/22/10

Sunrise, sunset quickly went the day

We knew a right whale survey on Jordan Basin in December was going to be a challenge. For the last three weeks, the days have been getting shorter and the storm systems stronger. And as the shortest day of the year was approaching giving us only 9 hours of daylight, our hope for calm weather was fading. Then a glimmer of a break in the weather appeared for Saturday, December 18. The back to back storm systems that had been hurtling across the country and along the eastern seaboard bringing high winds and precipitation for days on end were slowed by a high pressure system coming down from Quebec.

Saturday's forecast and predicted wave heights were the best we were going to get for awhile but would it be good enough to carry out our survey effort? On Friday morning we made the decision to go for it and by 1 pm the truck was loaded and we were on our way from Boston to Bar Harbor, ME. Despite a slight increase in wind and waves on the Saturday morning forecast we decided to at least poke our heads out at 4:30 am. The land temperature was in the teens and there was several inches of snow on the ground. The boat's crew helped our team of six and a cadre of local volunteers load our gear and ourselves onto the snowy deck and into the cabin before heading offshore through a low cloud of sea smoke hovering above the water. By 7 am we had reached our survey area and there was just enough light to begin looking for telltale whale blows. The air temp was a balmy 25 degrees, and we decided to rotate our watch every 30 minutes to keep warm and alert. Even just 30 minutes on the top deck exposed to the full brunt of the wind on a vessel travelling 10-14 knots was bitterly cold, the wind chill was in the teens and in the frostbite zone on the windchill index.


With many sets of eyes looking near and far, several blows were seen miles away shortly after sunrise but they proved to be fin whales. We set off on our tracklines. Many hours of surveying yielded about a dozen fin whales and a few minke whales. Finally two right whales, almost in the middle of the survey area. Once again, they were cryptic in their movements and challenging to photograph. But we were able to obtain id photos and continued our survey.

But the second shortest day of the year proved to be just a little too short. Just at dusk we spotted three right whales, one of them breaching repeatedly. We adjusted our cameras to try an squeeze a little more light out of the day, but by the time we were able to get close enough to photograph, it was just too dark. We could still see the animal breaching through night vision goggles. However, we were left with a beautiful image in our mind's eye of a breaching right whale set against a back drop of the last tendrils of light from a beautiful sunset.

Once darkness fell, the captain headed us for home transiting slowly through the right whale area before picking up speed. We compiled our data and shared our findings with the volunteers aboard (who were also collecting bird data). Despite many sightings of both birds and cetaceans, the general consensus was that counts and species of birds were lower than previous trips and right whales were harder to come by. We did learn that our colleagues at the National Marine Fisheries Service had conducted an aerial survey this same day to our south and west and had found at least 28 right whales including a large surface active group in an area called Cashes Ledge. It may be that the purported mating ground covers a much broader area of the Gulf of Maine than previous surveys had indicated.

We were back at the dock by around 7:30 pm exhausted but happy that the weather gave us the opportunity to brave the cold and once again witness the Gulf of Maine under cover of winter. We have one trip left that will take place in January. Happy Holidays to all our followers and best wishes for a healthy and adventure filled 2011!

12/2/10

#3 Perfect conditions in the Jordans/Outerfalls area

On short notice, a perfect weather window opened up for our second excursion to the area just west of Jordan Basin. On Tuesday November 30, we set sail aboard the Friendship V from Bar Harbor to learn more about the right whales on the potential mating ground. The constellation Orion was bright overhead as we left the dock at 4:45 a.m. and steamed out in the darkness. The seas were calm this trip and sighting conditions perfect. We found our first right whale just as the sun broke the horizon and worked a smattering of whales throughout the day. It was a very different day than our first- many humpbacks and fin whales in the same areas where we found right whales.

#1056, showing some mud on his head! (Photo: Amy Knowlton)

We photographed a total of seven different right whales--none that we had seen on our first trip and no females this time. We found a number of big old males that we never or rarely see in the Bay of Fundy or on Roseway Basin including No. 1056 (shown above)--a male that was first seen 30 years ago. The right whales continued to be difficult to approach due to their erratic surfacings and inconsistent travel directions. We found a couple groups of two or three whales socializing (all males), but the quality of their behavior was very different from such groups in the Bay of Fundy or Roseway Basin.

The groups on Tuesday were very slow moving, quiet, and one whale rarely came up to breathe-- a far cry from the often noisy and active groups in August and September [Check out photos and videos of active groups from the Bay of Fundy in 2008 and 2009, as well as this post from the fall describing a group in the Roseway Basin]. This subdued behavior is similar to some groups I witnessed back in the 1980's in Cape Cod Bay in February. It could just be an artifact of the small size of the groups we have seen near Jordan so far and we will see more energetic interactions when we find larger groups, or it could be that they are truly socializing in a different way in this habitat. It is exciting to try to understand their behavior in such a different habitat- it is all new!

The Northeast Fisheries Science Center plane surveyed the area while we were there and photographed nine whales. They too found the whales difficult to photograph because they spent such short periods on the surface. Prior to this trip, we had seen a few whales that the plane had also seen, but not many. Tuesday was the first time we were both in the area at the same time and it will be interesting to compare the identifications from the two, very different platforms.

We still haven't found any precious whale poop that would tell us what their reproductive hormone levels are, though we did have one moment of excitement when some volunteers on the bow excitedly announced that they smelled something really bad! We scrambled to get the net ready to collect a poop sample which floats on the surface for a while, but it ended up being a false alarm caused by a whale with particularly bad breath--something that has tricked us in the past.

We will be looking for a good weather window for another trip in a week or two and this time will be hoping for a larger social group or SAG. Will these be similar to those SAGs we see 2-3 months earlier? Or be as different as the behavior we have documented so far? Stay tuned!

Philip using the field catalog to match right whales (Photo: Moe Brown)

Philip

11/22/10

#2 A lull in the weather of November in the Gulf of Maine

Three times a day for two weeks we studied the weather forecast and data on wind speed and wave height from the weather buoy in the vicinity of Jordan Basin. Day after day the winds were greater than 20 knots, and the wave height over eight feet: not sea conditions favorable for right whale research. On Thursday November 11, the weather began to look promising for the following week: winds were forecast to calm to variable less than 10 knots and the waves subsiding to 2 - 5 feet, almost perfect conditions.
On Monday November 15 we loaded up all our gear at the Aquarium in Boston and drove to Bar Harbor. We met up with the crew of the charter vessel, Friendship V, a 112' long catamaran used seasonally for whale watching and now geared up for whale research. Our first hours were spent unloading our gear, becoming familiar with the safety procedures on the boat, then dinner and early to bed. Departure on Tuesday November 16 was at 4:30 am, well before first light. It was going to take about two hours to get to our first trackline and we wanted to be there at sunrise. The day before, right whales had been seen by the Northeast Fisheries Science Center aerial survey team; at least we knew there were right whales in the area. Before we left we planned our tracklines to cover the area of right whale aggregation from previous years. Our plan worked well, well almost. We arrived at our first waypoint about 55 nm south of Bar Harbor at dawn. In addition to our team of six biologists from the Aquarium, we were joined by whale researchers, interns and naturalists from the Bar Harbor area. We set up our watches, spread out around the upper deck of the boat and watched with amazement as a fog bank engulfed us in a matter of minutes. Having steamed all this way, there was no point in turning back so we proceeded slowly, peering into the fog and listening for whale blows.

The visibility shrank at times to less than 100 yards, but then someone called out they had heard a blow and sure enough a right whale. Our first right whale was #2791, an adult female who calved in 2009 and is due to get pregnant.

By early afternoon, the fog bank cleared and we surveyd until it was too dark to see. In total we recorded about a dozen whales for the day. Fourteen hours after our depature we docked back in Bar Harbor, and were ready for another survey the next day. But the weather closed in again. The crew of the Friendship V made plans to relocate the vessel to a secure mooring early the next morning to prepare for the next storm. We managed to get our first survey completed on the only calm day for over two weeks. Our next survey will take place in early December.

Many thanks for a very successful survey to the captain and crew of the Friendship V and our vounteer team of researchers from Allied Whale, Maine Department of Marine Resources, naturalist and interns from the Bar Harbor Whale Watch Company and Down East Nature Tours.

#1 Quest for the Right Whale Mating Ground

There are many aspects of the life and habits of North Atlantic right whales that remain elusive and one long-standing mystery is the location of their mating ground. Most right whale calves are born from December through February on the only known calving ground, located in the waters of the southeast U.S. We estimate that the gestation period is 12 to 13 months, which means mating likely takes place between November and January.

In January 2002, right whales were seen from a military vessel southwest of Jordan Basin in the central Gulf of Maine, approximately 60 miles south of Bar Harbor, Maine. From 2004 through 2009 in November, December and January, scientists from the Northeast Fisheries Science Center (NEFSC, Woods Hole, MA) recorded aggregations of right whales in the same area (their image provided below).


In November and December 2010 and early January 2011, a joint international research team from the New England Aquarium (NEAq) and the Canadian Whale Institute (CWI, Wilson's Beach, NB) will charter a vessel from Bar Harbor, ME. The team will carry out vessel surveys in this area to collect photographs of right whales for individual identification, scarring and health assessment as well as skin biopsy samples for ongoing genetics studies, and fecal samples for studies on reproductive hormones. Funding for the field study has been provided by the U.S. Marine Mammal Commission (grant to NEAq) and the Canadian Wildlife Federation and TD Bank (grant to CWI).

Friendship V

The survey vessel, Friendship V, is being chartered from Ocean Properties who are providing additional in kind financial support and with rooms at the Harborside Hotel for the researchers before and after the cruises. With enough funding for four survey days, the plan is, weather permitting, to survey one day in November, two days in December and a fourth day in January. Ideal weather is a must, which means less than 15 knots of wind and a swell of not more than 3 to 5 feet, and less is better on both counts. Stay tuned as we monitor the weather daily to find a suitable day.

- Moe Brown