Tag Archives: bioluminescence

Sea lions are here

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Mostly clear skies. Fog late morning into early afternoon. Winds between 10-15 knots most of the day. Barometric pressure rising the first half of the day and falling in the afternoon/evening.

6 whale watching boats (hard to say with fog though)

2 recreational fishing boats (PBM rentals)

2 recreational dive boats

Down to three elephant seals on the island currently. The sea lions have crept further up the east side of the island. There are an estimated 60-70 on the island now. The fence is still deterring them from the jetty, etc. Big moon tonight (supermoon tomorrow) but still the bioluminescent phytoplankton is visible!

A lady friend and illegal fishing

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Saturday evening when collecting the water sample, I noticed the familiar glow of Noctiluca scintillans, a type of dinoflagellate that when agitated by movement in the water, lights up; a process known as bioluminescence. A curious mammal approached me on the jetty when I realized it was a female elephant seal, which haven’t frequented the island for a number of weeks now. The female didn’t come onto the main island until the following afternoon, and I suspect she is the same one that came most recently about a month ago in early July. She has returned to her usual hangout spot next to the hose box.

Juvenile female elephant seal

Juvenile female elephant seal

Illegal fishing on the reserve is hard to moderate although remains an important role of the reserve. Today I came across two Glaucous-winged gull chicks picking at what seemed to be a worm, but turned out to be fishing tackle some adult gull had probably returned with from the kelp beds.

Fisherman in a kelp bed near West Race Rocks

Fisher in a kelp bed near West Race Rocks

 

 

These unexpected fisherman, above, claimed ignorance when I approached them about fishing poles in the water.

Sea lions at sunset

Sea lions at sunset

 

 

 

California sea lions have joined the Stellars on the southern rock.

Orca Sighting

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Mid-morning of 16 August a pod of orcas passed eastward on the north side of the island. There were only a half dozen or so, suggesting a transient pod. Of course, there were many whale watching vessels in the area. It saddened me to see some approach closer than the recommended 100m and not turn their motors into neutral and it sickened me to see an Eagle Wing Tour boat actually chase alongside the pod in the reserve. There should be more respect for these marine mammals, especially while in the reserve.

Orcas east of Race Rocks

Nonetheless, it was an amazing sight!

The sea lions have crept their way further up from the water. The image below was captured 18 August.

 

 

18 August 2012

Also, for the past 3 nights the bioluminescence of the phytoplankton (Noctaluca) in the water was been remarkable. The outline of the sea lions glow when they take to the water. This is curious because normally for phosphorescence to occur there needs to be rain and then sun and until today there has been no rain.