Wart Free of Entangling Gear

Wart, #1140 who carried rope through her mouth and wrapped around her rostrum for two years is now gear free, thanks to the Center for Coastal Studies and the NOAA aerial survey team who coordinated the cutting of the rostrum wrap which freed the ends of the rope (see May 2 posting). With the rostrum wrap cut, the rope slipped out of her baleen and she was photographed by the NOAA aerial team surveying the Great South Channel gear free. Her mouth has a lot of scarring from the chaffing of the rope but she is otherwise healthy. Let's hope she remains gear free.

Wart partially disentangled

The NOAA aerial survey team spotted Wart #1140 on May 1 in the Great South Channel off Cape Cod. The Center for Coastal Studies team were already on the water and proceeded to the location. The plane was able to stay on site through most of the disentanglement attempt and helped to keep the boat team on Wart as she actively avoided all attempts to get close to her. This avoidance behaviour is very common in right whales and complicates getting near a whale to remove entangling lines but is inherent to right whales to avoid harassment. Their strength and endurance that allows them to feed for hours on end with their mouth open straining zooplankton from the water, also prevents them from tiring easily when pursued. Unfortunately, it was not enough to protect them from the determination of the whalers.

Using a new cutting device, the disentanglement team eventually were able to cut the two lines over Wart's rostrum between her large lower lips and the line fell away. Sinking line still exits the mouth but when the plane had to return to shore for fuel, the boat team were unable to get close enough to try to grapple the sinking line. They were able to get clear photographs that the rostrum line was gone. If Wart is seen again, she will be assessed as to the remaining entanglement. It is hoped that with the two lines gone from the rostrum, the other line may work its way out of the mouth but it is not known how the line is held in the baleen.

Great work to the NOAA aerial crew and the Center for Coastal Studies disentanglement team!

Wart seen again

Wart was seen east of Cape Cod on April 21, 2010 and the Provincetown Center for Coastal Studies spent three hours with her to see if they could cut off the wrap of rope that goes over her rostrum, in and out of her mouth. Unfortunately Wart spent most of that time feeding just below the surface or breaching so nothing could be done about her entanglement. She still looks healthy even though she has had the rope entanglement for two years, since at least March 6, 2008 when she was spotted in Cape Cod Bay. This is the third time in 2010 that she has been seen.

Block Island right whale aggregation

The National Marine Fisheries Service flew an aerial survey on April 20, 2010 to look for right whales off Block Island. This is an historic area where right whales were hunted. In recent times right whale have been seen in this area but not in these numbers. Often their presence has been detected by sonobuoys, underwater buoys equipped with hydrophones, placed to pick up right whale calls in this area. Nearly 100 right whales were seen feeding in large groups. A mother and calf were also seen.

This aggregation seems to follow the abnormal winter with many adult right whale males going to the calving areas off Florida and Georgia and the mothers occurring more offshore and further south than usual. The latter was attributable to the colder than normal water temperatures after freezing temperatures in January.

Normally this time of year right whales are spotted in Cape Cod Bay and beginning to move into the Great South Channel.

The United States does have a speed reduction for large vessels that is implemented when right whales are aggregated in areas which hopefully will reduce the probability of any getting hit by ships as the ships head in and out of the port of New York, past Block Island.

Calf count grows as does Wart's family tree

It has been a slow calving season but several new mothers and calves have been spotted and the calf total is now 16 with a few potential mothers still in the calving area. That ties the number in 2004, the lowest number of calves born from 2001 to present, which is much higher than the lowest previous number of one calf in 2000.

Wart has a new great grandcalf. Her granddaughter Insignia #2645, daughter of Slalom #1245 was seen with her third calf on March 5. Her first calf in 2005 died. She had her second calf in 2007 after only two years which is only possible in right whales when a mother looses a calf shortly after birth and she does not loose the tremendous amount of blubber to nursing a rapidly growing calf. The female must regain the weight before she can get pregnant again and this is done during the resting year after the mother and calf separate, approximately a year after birth, is pregnant for a year and nurses for a year which gives a three year calving interval. Not all females are on this interval and there can be great differences between females. When the calf is lost the female can regain the much smaller weight loss more quickly and be ready for her next pregnancy earlier.

Wart's family now consists of six calves, eight grand-calves and three great grand-calves. At least one daughter #1704 is presumed dead, as is her calf #2704. Shackleton #2440 created quite a stir when he swam up the Delaware River, almost to Philadelphia.

Although not one of our adoptive whales, Stumpy was a regular to the Bay of Fundy. She died in 2004 when hit by a ship just prior to giving birth. Her loss was devastating to all that knew her and even more so because of the loss of the calf. Her extremely large size made it very difficult to recover her carcass. Her last calf #2710, born in 1997, has had her second calf this year, her first in 2006. Stumpy's daughter Phoenix is a grand mother again with her daughter having her second calf this year. She had her first calf in 2007.

Gemini shows up in calving area

Gemini has been spotted in the right whale calving area off Georgia in the first part of February. This is the second time he has been seen in the calving area, the first in 2008. Gemini is more than 30 years old but his exact age is unknown. It is unusual for adult male right whales to travel to the calving area, preferring to winter somewhere else. The calving areas are not breeding areas for right whales. Why Gemini is now going to the calving area is unknown.

In recent years, aggregations of adult right whales have been observed in the Gulf of Maine (Jordan Basin and Jeffrey's Ledge) well into January before dispersing. It has been speculated that this might be a breeding area, given that right whale gestation is about a year with calves generally born from December through March

Gemini joins another approximately 90 right whales that have been seen in the calving area this winter but only eleven mothers and calves this year so far, well below the number of calves born in the last nine years but more reminiscent of the numbers in the 1980s and 1990s.

Kleenex's family grows again

While the calving season has been slow this year for right whales with only ten calves born so far, Kleenex's family has grown with three new members, 2 grand-calves and one great-grand-calf. There is still time for a few more calves to be born and at least three or four possible mothers have been seen in the calving area, along with 60 other right whales.

Daughter #2642 (born in 1996) has had her second calf, the first born in 2007, daughter #3142 (born in 2001) has had her first calf (reported on January 6), and grand-daughter #3123 (daughter of Sonnet, aka Drippy-nose) has had her first calf. This means that Kleenex now has seven grand-calves and five great-grand-calves.

Daughter #2642 was last identified when she was in the Bay of Fundy with her first calf. Grand-daughter #3123 was last seen in August, 2008, also in the Bay of Fundy.