Video Sensing Movies
MOVIES PRESENTED BY MIKE CAPPO
These are QuickTime movies and require MoviePlayer or similar software to run.
| Movie 1 (178 Mb) |
Video footage: Deployment of BRUVS from a 6 m research vessel, and selected sequences of attraction of fish and attacks by predators on the bait canisters. Footage is from daytime over carbonate sediments with natural light at 45-72 m depths at Scott Reef Lagoon (WA), and from Palm Islands (GBR) over inshore, terrigenous sediments in 32 m (tiger shark sequence).
| Movie 2 (208 Mb) |
Video footage: Entry, feeding and escape by the Red Emperor (Lutjanus sebae) into and out of "Mounsey design" collapsible fish traps used for fishing and scientific sampling of tropical "redfish". Footage is from daytime with natural light at 52 m over carbonate sediments. No fish and no bait remained in the trap when it was hauled after a 3 hour soak.
| Movie 3 (2.5 Mb) |
Animation showing the potential for re-counting of large, very mobile species both within a 90 minute BRUVS tape and between 3 BRUVS replicates. Aggregation of the statistic MaxN will be invalid for this species in this particular string, because the replicates are not independent.
| Movie 4 (2.5 Mb) |
Animation showing the potential for re-counting of schools of mobile fish both within a 90 minute BRUVS tape and between 3 BRUVS replicates. Aggregation of the statistic MaxN will be invalid for this species in this particular set, because the replicates are not independent. There will also be a saturation effect where MaxN will underestimate the number of fish in a school because of the density of fish in the field of view.
| Movie 5 (3.5 Mb) |
Animation showing a hypothetical scenario where abundant, dispersed individuals are attracted to a BRUVS and concentrate around it within a 90 minute tape. MaxN will be a useful statistic of relative abundance for this species.
MOVIES PRESENTED BY CHRISTINE CRAWFORD
These are avi movies and require Windows MediaPlayer or similar software to run.
| Movie 1 (24 Mb) |
Video footage from salmon farms showing the characteristics of impacted sites: a grey/black sediment colour, extensive cover of Beggiatoa bacterial mats, and pellets and faeces.
| Movie 2 (35 Mb) |
Video footage showing typical unimpacted sites (compare to video 1 showing impacted sites).
| Movie 3 (21 Mb) |
Video footage from a salmon farm showing gas bubble emission from sediment, which is a strong indicator of an impacted site.
MOVIE PRESENTED BY GARY KENDRICK
This is an Mpeg movie and requires Windows MediaPlayer or similar software to run.
| Movie 1 (0.5 Mb) |
Animation showing changes in benthic habit mapped between 1967 and 1999 in the Cockburn Sound and Owen Anchorage areas.