LIFESTAGES OF OYSTERS Crassostrea virginica implicationS for freshwater management Aswani K Volety Lesli Haynes Emily Nickols Julien Vignier Tom Dolan Peter Doering Patricia Gorman Barbara Welch Liberta Scotto ID: 483815
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EFFECTS OF SALINITY ON LIFESTAGES OF OYSTERS Crassostrea virginica: implicationS for freshwater management
Aswani K. Volety, Lesli Haynes, Emily Nickols, Julien Vignier, Tom Dolan, Peter Doering, Patricia Gorman, Barbara Welch, Liberta ScottoSlide2
Why Oysters as Indicators Benthic, Sessile, Filter feeders (4-34 L / hr./oyster)Make excellent cause and effect relationshipsCreate secondary habitat Benthic-pelagic coupling
Mitigate boat wakes and storm surgeSlide3
Conceptual ModelSlide4
Salinity - FlowStation
Relationship
R
2
Iona
Cove
Y=5e-07X2-0.0078X+29.719
R
2
=0.73
Cattle DockY=4e-07X2-0.007X+31.234R2=0.68Bird IslandY=3e-07X2-0.0053X+33.241R2=0.64Kitchel KeyY=1e-07X2-0.0036X+32.222R2=0.58Tarpon BayY=1e-07X2-0.0032X+37.351R2=0.61Slide5
Sampling LocationsSlide6
Oyster Life CycleSlide7
Gonadal Index (reproduction)Slide8
Spat RecruitmentSlide9
Gamete Fertilization Slide10
Day 4 Embryo MortalitySlide11
Day 4 Larvae MortalitySlide12
Salinity and SpatSlide13
Juvenile Oysters Open vs. Closed BagsSlide14
Higher Predation DownstreamSlide15
Salinities this SummerSlide16
Juvenile SurvivalSlide17
Salinity Effects on Disease Slide18
Gaps in KnowledgeHad to decrease replicates and number of stations due to funding constraintsRole of nutrients, contaminants, harmful algae bloomsEffects of multiple stressorsSlide19
AcknowledgmentsTechnical/Field help: Lindsay Castret along with numerous undergraduate and graduate studentsFunding: South Florida Water Management District