reef monitoring 3
TRANSCRIPT
•CHARACTERISTICS:•Medium sized, oblong-shaped, triangular heads•Jaws bearing enlarged canine teeth
•BEHAVIOUR:•Carnivores•Nocturnal predators, but daytime swimmers in water column•Some species form large groups
•IMPORTANCE: •Key carnivores and commercial sp.•Form spawning aggregations
•RECORD ONLY THESE: •Yellowtail, Schoolmaster and Mahogany
•CHARACTERISTICS:•Heavier bodies•Big fat lips
•BEHAVIOUR:•Usually hiding or in camouflage•Nighttime predators
•IMPORTANCE: •Key carnivores and commercial sp.•Form spawning aggregations•IUCN Endangered
•YOU WILL RECORD AS: •Large growing species (Goliath, Black, Nassau, Tiger)•Small growing species (Graysby, Coney, Hinds)
•CHARACTERISTICS:•3 first dorsal spines elongated •Color variable•Black spot at base of dorsal fin
•BEHAVIOUR:•On open areas•Feeds on mollusks, crabs and urchins
•IMPORTANCE: •Commercial sp.•Highly valuable meat•IUCN Vulnerable
Long Spiny Sea Urchins: Long Spiny Sea Urchins: Abundance Abundance
Record # of individuals Count along 2 m. belt in
transect No time keeping is needed
Water Temperature (°C)Sea State (Beaufort Scale)Wind speed and direction
• Recorded in mph• N-S-E-W
Horizontal Secchi Disk measurement• Recorded in m.• A measure of visibility
Beaufort Number
Wind speed (mph)
Description Wave Height (m)
Sea Conditions
0 <1 Calm 0 Flat
1 1-3 Light air 0.1 Ripples without crests
2 3-7 Light breeze 0.2 Small wavelets. Crests not breaking
3 8-12 Gentle breeze 0.6 Large wavelets. Crests begin to break; scattered whitecaps
4 13-17 Moderate breeze 1 Small waves
5 18-24 Fresh breeze 2 Moderate (1.2 m) longer waves. Some foam and spray.
6 25-30 Strong breeze 3 Large waves with foam crests and some spray.
7 31-38 High wind 4 Sea heaps up and foam begins to be blown in streaks in wind direction.
** 12 Scale goes up to and is used throughout the world as an indicative of weather and to issue warnings on hurricanes and storms