Introduction for NOAA lesson by Susan Kaiser, TAS 2012: One Fish, Two Fish
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Transcript of Introduction for NOAA lesson by Susan Kaiser, TAS 2012: One Fish, Two Fish
Reef Fish Sampling in the Reef Fish Sampling in the Florida KeysFlorida Keys
by: by: Danielle MorleyDanielle Morley
Edited for use at Pine Middle SchoolEdited for use at Pine Middle Schoolby: Susan Kaiserby: Susan Kaiser
NOAA Teacher at Sea 2012NOAA Teacher at Sea 2012
Florida Fish and Wildlife Conservation CommissionFlorida Fish and Wildlife Conservation CommissionFish and Wildlife Research InstituteFish and Wildlife Research InstituteSouth Florida Regional LaboratorySouth Florida Regional Laboratory
2796 Overseas Hwy; Suite 119; Marathon, FL 330502796 Overseas Hwy; Suite 119; Marathon, FL 33050
Coral reef managers around Coral reef managers around the world have similar the world have similar questions:questions:• Are the coral reefs healthy?Are the coral reefs healthy?
• What are the threats impacting coral reefs?What are the threats impacting coral reefs?
• Are fish populations increasing or Are fish populations increasing or decreasing?decreasing?
• Are management actions successful?Are management actions successful?
• Is a marine protected area working?Is a marine protected area working?
• What is the level of satisfaction of the What is the level of satisfaction of the resource users?resource users?
This presentation gives a overview of This presentation gives a overview of some current research projects in the some current research projects in the Keys. It also prepares you for a Keys. It also prepares you for a simulation activity in class. simulation activity in class.
Finfish Finfish ResearchResearch Group Group
Ocyurus chrysurus yellowtail snapper
Commercially and Recreationally Commercially and Recreationally Important SpeciesImportant Species
Mycteroperca bonaci black grouper
Lutjanus analis mutton snapper
Lutjanus griseus gray snapper
Location, location, location!Location, location, location!
Key WestDry Tortugas
Florida
Cuba
Bahamas
Key Largo
Overview of the Finfish Program Overview of the Finfish Program Several different programs study fish populations Several different programs study fish populations
throughout the entire Florida Keys reef track and covering throughout the entire Florida Keys reef track and covering various life stages.various life stages.
Seining Seining ProgramProgram
Spawning AggregationSpawning Aggregation StudiesStudies
Reef Visual Reef Visual Census Census
Seine Survey Seine Survey
21.3m offshore seine net with 3.2mm mesh
Typical catch
Mutton snapper
Scientists count the fish found in shallow waterScientists count the fish found in shallow water
Reef Visual Reef Visual Census (RVC)Census (RVC)
Goal:Goal: Estimate population & Estimate population & community make upcommunity make up
Method: Method: Stratified Random Sampling
Data Collected:Data Collected:
• Showed >280 SpeciesShowed >280 Species• Included all fish life stages & sizesIncluded all fish life stages & sizes
Methods: Stratified RandomMethods: Stratified Random
15 m5 minute count5 - 10 and >10 minute count
Stationary Point CountsStationary Point Counts
7.5 m
Fish Spawning AggregationFish Spawning Aggregation(FSA) in the Dry Tortugas(FSA) in the Dry Tortugas
Lutjanus analisLutjanus analis mutton snappermutton snapper
Mycteroperca bonaciMycteroperca bonaci black grouperblack grouper
Ocyurus chrysurus Ocyurus chrysurus yellowtail snapperyellowtail snapper
•What are the population dynamics of What are the population dynamics of those reef fishes in the Dry those reef fishes in the Dry Tortugas?Tortugas?
•Are there spawning migration Are there spawning migration patterns?patterns?
•What type of fish movement occurs What type of fish movement occurs between foraging grounds and between foraging grounds and spawning aggregation sitesspawning aggregation sites??
• How do fish use habitats of the reef How do fish use habitats of the reef environments and how long do reef environments and how long do reef fishes stay in the region?fishes stay in the region?
Since 2008:Yellowtail (18)
Mutton snapper (56)
Black grouper (36)
Fish Surgery???Fish Surgery???
Scientists must dive to service receivers a couple times a year.
Sampling areas covered by the receivers included approximately 800km2 and are comprised of varying habitats.
FSA Work in the Dry TortugasFSA Work in the Dry Tortugas
83° 05’ 83° 00’ 82° 55’ 82° 50’
24°
40’
24°
35’
24°
30’
L. analis L. analis – 69.2 cm– 69.2 cm
TNER
TSER
RNADRTO
May June July
Spawning Corridor
No TakeNo Take
No Take
Home Range Estimate
• Marine scientists will continue to collect data to better understand the fisheries in the Florida Keys National Marine Sanctuary.
• The new information they gather will help policy makers better manage these natural resources.
• In the next class meeting, YOU will simulate the process used by scientists in the spawning aggregation study to add to their data set and make future recommendations to resource managers.
Future Research…