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Showing posts with label t49s. Show all posts
Showing posts with label t49s. Show all posts

Thursday, April 9, 2009

Transient IDs and Navy Sonar Incident and Comment Period

After comparing notes with other whale reports I've been able to figure out the identity of all the transients ("Ts") I saw on Monday. The two females and calf were the T123s. T123 is the mother and the calf is T123B, a newly documented whale probably just a few months old. While both mom and youngster were around in the porpoise hunt, my photos revealed that it was T123's older daugther, nine year old T123A, that was the primary participant and the whale that launched the porpoise out of the water. It's amazing to me that we know enough about these whales - even the relatively mysterious transients - for me to be able to figure out the exact whale it was in that photo. Thanks, of course, to others who were there being able to ID the group of three as the T123s, and to T123A having a distinct notch on her fin I can just make out in that photo. Here's another photo showing her and her notch:

T123A

The other group of Ts was indeed male T14 with four of the T49s - specifically, T49A, T49A1, T49B, and T49B1. The complicated transient whale nomenclature actually encodes the whales genealogy in their names, since their pods are more fluid than those of the resident whales. So T49B was the second offspring of T49, and T49B1 is the first offspring of T49B.

Finally, I must say a word about a bizarre incident that occurred the night of the 7th-8th. Starting at about 7 PM and continuing until after 4 AM, a strange human voice and sonar pings were audible on the Lime Kiln and Orcasound hydrophones. It turns out the sonar pings were coming from the US Navy submarine the USS San Francisco, and the strange voices were underwater communication occurring between the submarine and an accompanying surface vessel. You can hear a sample of the sounds that occurred here.

Navy sonar is a great concern when it comes to marine mammals, because animals in the presence of sonar have demonstrated physiological and behavioral responses the intense sounds including disorientation, panic, hearing loss, tears in the ear, brain hemorrhaging, and stranding, in some cases resulting in the death of the animal. The last major incident in the area involving Navy sonar occurred in May 2003 when J-Pod was in the area - a scary situation in which these endangered whales showed unusual behavior where they came close to shore (where the acoustic impacts of the sonar were lessened) and repeatedly spyhopped, apparently to get their ears clear of the water. That incident resulted in the deaths and stranding of at least several harbor porpoises, and you can read about it and see evidence of porpoise brain hemorrhaging at the Center for Whale Research's report on the Shoup.

Luckily there have been no reported strandings in response to this most recent incident and no orcas were believed to be in the immediate area at the time, although several transient groups were reported in the region in the days preceding and following the incident. Still, it is a grim, timely reminder that the US Navy is exempt from the Marine Mammal Protection Act, and is currently seeking to expand its local training range to include a huge portion of vital killer whale and marine mammal habitat. They are currently seeking public comment on their Environmental Impact Statement (EIS), and their proposal in includes minimal mitigation measures to prevent harm to marine mammals.

Obviously, this is an issue close to my home and my heart. I strongly encourage you to submit public comments supporting the "No Action Alternative", which keeps the current training area in place. They simply have not invested the resources in studying the impacts to marine mammals and do not have the measures in place to ensure marine mammals are not within lethal range of their sonar and explosive detonations during training activities. The EIS document itself is imposing, but you can read up on this issue and learn everything you need to know to comment via Orca Network's informational page about this public comment period. Comments are due April 13th!

We need to take into consideration our nation's security and I understand the need for the Navy to undergo training exercises. Still, this is such a vital yet fragile marine ecosystem, and one serious incident involving sonar and the Southern Resident whales could easily spell their extinction. Hopefully under President Obama, we can begin to improve international communication so that disagreements are resolved at the bargaining table and not at war, and these sorts of training exercises will be less necessary and perceived as less vital for maintaining our country's safety. Obama appointed Jane Lubchenco to head the National Oceanic and Atmospheric Administration (NOAA), and she is a respected marine biologist who has critiqued the government's dealings with oceanic issues in the past. She recognizes that we, as a people, along with all life on earth, depend on healthy oceans to survive on this planet. Hopefully we, as a nation, will move towards an attitude that preserves our marine resources and helps them to thrive, from orcas and harbor porpoises to krill and plankton. I understand the need for military operations, but it's hard for me to justify some of their short-term goals when looking at the long-term impacts it could have on ocean life.

Tuesday, April 7, 2009

My First Orcas of 2009: Transients in Haro Strait!

Yesterday was a beautiful spring day - sunny, flat calm waters, 60 degrees. What could make it even better? A whale report of course! I heard from Jim Maya in the morning that there was a report of transients heading east from Victoria, right into our neighborhood. Luckily he was heading out in the afternoon and had space on board, so I was excited to have the chance to go out with him, thinking I might see my first orcas of 2009. Little did I know what an amazing transient orca encounter lay ahead of us!!

There were three different groups of transients in the area totaling about 14 animals. Transients are the marine mammal feeding orcas that are in smaller groups, roam less predictably, and have been seen more and more in the area in recent years due to the booming pinniped (seal and sea lion) population. They don't interact or interbreed at all with J-, K-, and L-Pods, the fish-eating residents we see most often in the summer.

The first group of transients we got a good look at was a group of three whales including two females and a very young calf:



Soon after we arrived on scene they started circling, which is typical hunting behavior. Jim had seen some porpoises in the vicinity, and sure enough I soon spotted a little harbor porpoise surfacing in front of the whales, being chased around in circles. Both the females and the calf were involved in the chase. The calf was so small that at times it was hard to tell the calf from the porpoise they were chasing! On the left is the calf (maybe 6-7 feet long) surfacing in front of its mother. On the right is the porpoise (maybe 4-5 feet long) surfacing in front of one of the female Ts:














Were we perhaps seeing this little calf being trained in the hunt? It sure looked like at as they "toyed" with the porpoise for about 20 minutes before the hunt really got serious. And did it ever get serious in a hurry! Suddenly one of the adult orcas lunged completely out of the water, launching the harbor porpoise high into the air! I can't believe I had my camera in the right spot at the right time and even remembered to click to take the photos....I'll be honest I didn't even see the porpoise when the event happened live at real time but the photos revealed what happened:



That was the last we saw of the porpoise - alive anyway. Next the feeding occurred, and here is one of the adults circling a piece of red meat that was floating on the surface. The meat disappeared just after this pass by the orca:


Right after the kill finished we were surprised by the appearance of another group of 5 transients right in our vicinity. We had seen them in the distance earlier but thought they had headed in the opposite direction. It just goes to show how easily these whales can appear and disappear, especially if they're in "stealth mode". This photo shows male T14, also known as Pender, on the left. The first time I saw Pender was back in September; he's a well-known transient locally because of the scars on the front edge of his dorsal fin from a tagging device that was attached to him in the 1970s.


T14 often travels alone, but here he is pictured with the T49s. My best guess from left to right is: T14, T49A1, T49B1, T49B, and T49A. Click on the photo for a better look at it.

Before we headed back to the harbor we had a good look at the 3 stellar sea lions, and then later in the day back at home I had an amazing look at a juvenile bald eagle - so those will be featured in the next post!