The Johan Ashuvud Project, 2000

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Victor David and Satoshi: For two weeks in May and June of 2000, Lester Pearson College graduating students, Victor Rakou, David Mesiha and Satoshi Kimura, and in the last week, Juan Manuel Alva and Martin Kryl, joined the sea gulls and stayed at Race Rocks running daily programs on a live camera, and broadcasting directly to the web. Faculty member Garry Fletcher worked with them for the daily webcasts from the shore and from underwater. Sponsorship for this week came from the Johan Ashuvud memorial fund.

The first big event was the Swiftsure Race Weekend. A camera was set up along with a supporting G4 computer in the top of the light tower. Two streams were broadcast, one to camera 4 on the website and a special experimental dedicated stream to Shaw Cable. This stream was of TV quality at 1Mbps and 21 FPS.

Our thanks to Kevin Sytsma of LGS for coming out to help setup for this 2 day broadcast and to Ken Dunham ( PC year 9) for reconfiguring the server from Ottawa in order to handle this experiment.

Each day at Low tide we set up in different locations around the island, always being careful to not disturb the nesting seabirds futher up on land. A Sony camera linked by Firewire to a G3 500 Mghz computer was located in the intertidal zone. From here, Audio and Video Signal went by the wireless Macintosh AirPort Link to the Science Centre. From here the signal traveled by Cat.5 cable to the top of the light tower where it was sent by radio to the Telus antenna at Lester Pearson College. From there it was webcast in live streaming video to the internet by a Macintosh G4 500.

Content through the week ranged from adaptations of organisms to the special ecological niches of tidepools and intertidal slopes, to First Nations use of resources and the role of community/ stakeholder participation in the Marine Protected Areas Pilot process.

The airport wireless base station was tried in a number of locations. We relied on David to find the best locations for connectivity. Best wireless transmission was achieved when we hoisted it up to the roof of the science house. The radio waves go through buildings but not through rocks!

Further editing for the video archives took place in the science centre in the evenings.

Video created this week by the team:

june92000s jochensealions newgulls wwfgulls
Underwater Invertebrates and Fish On the last day of live webcasting, sea lions visited Glaucous-winged gull behaviour Gull territorial aggression

Chris Blondeau from Lester Pearson College joined us for a session on the care and maintenance of the underwater camera and housing. Chris is in charge of the shore-front at the college and is in charge of the SCUBA Diving program there.

We were also fortunate to have some visitors take part in the intertidal discussions we had on the islands. Dr. Jochen Kuum ( PC year 10) is seen here with Garry and diving with Satoshi and Victor Stephen Haggarty (PC year19) also participated above and below water. This video was made on the last dive

 

Carol Slater, who along with her husband Mike are the guardians of the MPA joined us to talk about the Black Oyster Catcher. We examined the trays of shells from last years midden of one nest. This parent bird was foraging off to the East of the dock where they hatched two chicks this year

Race Rocks viewed from the South at Rosedale Rocks Buoy.

One of the best parts in staying at Race Rocks overnight while doing these webcasts was the great sunsets. Sometimes you can view these on the remote control camera 1 and camera 5.

 

Predation by the Black Oystercatcher….1999

In September of 1999, the students of the Environmental Systems Class collected the shells in the midden surrounding the nest of a pair of Black OysterCatchers at Race Rocks, They analysed the size, species diversity, and species frequency of the shells. The following data and charts are presented in order to provide information about the role of this seabird in the intertidal ecology of Race Rocks.

Numbers of Shells Collected Near Black Oyster Catcher’s Nest
    Limpets: Mask, Shield, and Plate 350    
    Limpets: Whitecap 70    
    Limpets: Fenestrate 19    
    Limpets: Rough Keyhole 2    
    Chitons: Black Katy 73    
    Chitons: Mossy 13    
    Chitons: Lined Red 7    
    California Mussels 342    
    Ribbed Whelk 5    
    Amphisia Snail 1    
         

Average Size of the Oyster Catcher’s Food california mussels –5.2875 cm plate,mask,shield limpets–3 cm whitecap limpets 5.2875 cm 3 cm 2.985 cm Size of Oyster Catcher’s Food: Raw Data, in cm

california mussels plate, mask and shield limpets white cap limpets
3 2 1.7
4 2.2 2.1
4.2 2.5 2.3
4.5 2.8 2.4
4.6 2.8 2.5
4.6 2.8 2.6
4.7 3 2.7
5.2 3 2.8
5.25 3.1 2.9
5.3 3.2 3
5.5 3.4 3.2
5.5 3.4 3.2
5.5 3.5 3.2
5.8 3.5 3.2
6. 3.5 3.3
6.5 3.5 3.6
6.6 3.6 3.7
7.5 3.8 3.8
7.8 3.8 3.8
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Garry Fletcher and Ecoguardian Carol Slater examining sorted shells of black oystercatcher prey from on midden.

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wintering gulls departing

10:45 – called tour boat” Great Pacific adventure to close to West and of North rocks chased three sea lions into water. We talked to Andrew.

11:52 small blast, no wildlife disturbed. Nesting goals visiting nesting areas early a.m. but do not stay all day. There are more glaucous-winged gulls arriving every day. gulls  that over wintered [probably Thayer’s] are all gone except for 30. On February 14 they had all left
February 15 , 5 tour boats through reserve.

Cleaning chimneys, furnace filters etc.

DND activity again

wins East 15 kn.Maintenance on desalinator – cracked pipe.

 

11:20 – series of small blasts with minimal bird movement.
13:44 – three large lasts, cormorants and seagulls took flight

13:48 – 60% of sea lions now into water. Only five harbour seals seen going into water.
13:50+15:02 medium blasts – birds took flight. T