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  • PACIFIC WHITE SHRIMP HATCHERY IN BIOFLOC SYSTEM

    Delano Dias Schleder*, Marco Antnio Lorenzo, Efrayn Wilker Souza Candia, Priscila Cardoso Rezende, Felipe do Nascimento Vieira, Walter Quadros Seiffert

  • Introduction

    Low temperature during winter (Jun-Sep)

    Shrimp culture season (Sep-May)

    Shrimp hatchery Commercial Labs (Aug-...)

    South of Brazil

  • IntroductionTraditional hatcheryAutotrophic system

    High costWater heating and exchanging

    Shrimp hatchery in Biofloc System

    Less use of waterCost

    Environmental impactBiosecurity

    Biofloc microrganisms feed supply to shrimp larvae

    Environmental impactUse and discharge of water

    Biosecurity problemsWater exchange

  • Introduction

  • Objective

    The present work aimed to evaluate the hatchery performance of the Pacific white shrimp Litopenaeusvannamei in biofloc system under different C:N ratios.

  • MethodologyExperiment

    - Biofloc System -

    Autotrophicsystem

    (Until Zoea III)

    FromMysis I

    Post-Larvae 57 days

    60L U-shape tanks (200 larvae.L-1) Temp.: 29 C Salin.: 35 ppm No water exchange

    C:N ratio - 10:1

    C:N ratio 12.5:1

    C:N ratio - 15:1

    Control group: C:N ratio 12.5:1

    Addition of dextrose ifammonia exceeded 1.0mg.L-1

    Treatments(quadruplicate)

  • MethodologyExperiment 7 days

    - Biofloc System -Day 1 Day 2 Day 3 Day 4 Day 5 Day 6 Day 7

    FeedingSchedule

    C. muelleri

    (5.104cels.ml-1)

    + commerc.

    feed (INVE)

    48% CP (9x/day)

    commercfeed

    (INVE) 48% CP (9x/day)

    +brine

    shrimp nauplii(5x/day)

    commercfeed

    (INVE) 48% CP (9x/day)

    +brine

    shrimp nauplii(5x/day)

    commercfeed

    (INVE) 48% CP (9x/day)

    +brine

    shrimp nauplii(5x/day)

    commercfeed

    (INVE) 48% CP (9x/day)

    +brine

    shrimp nauplii(5x/day)

    commercfeed

    (INVE) 48% CP (9x/day)

    +brine

    shrimp nauplii(5x/day)

    commercfeed

    (INVE) 48% CP (9x/day)

    +brine

    shrimp nauplii(5x/day)

    DextroseAddition

    4x/day

    following the C:N ratios of

    each treatment

    4x/day

    following the C:N ratios of

    each treatment

    4x/day

    following the C:N ratios of

    each treatment

    4x/day

    following the C:N ratios of

    each treatment

    4x/day

    following the C:N ratios of

    each treatment

    4x/day

    following the C:N ratios of

    each treatment

    4x/day

    following the C:N ratios of

    each treatment

  • MethodologyExperiment 7 days

    - Biofloc System -

    WaterQuality*

    AmmoniaNitriteNitrate

    TSS / TVSAlkalinity

    Temp.OxigenSalinity

    pH

    AmmoniaTSS / TVS

    Temp.OxigenSalinity

    pH

    AmmoniaTSS / TVS

    Temp.OxigenSalinity

    pH

    AmmoniaNitriteNitrate

    TSS / TVSAlkalinity

    Temp.OxigenSalinity

    pH

    AmmoniaTSS / TVS

    Temp.OxigenSalinity

    pH

    AmmoniaTSS / TVS

    Temp.OxigenSalinity

    pH

    AmmoniaNitriteNitrate

    TSS / TVSAlkalinity

    Temp.OxigenSalinity

    pH

    Performance

    Day 1 Day 2 Day 3 Day 4 Day 5 Day 6 Day 7

    Survivaland dryweight

    *(Grasshoff et al., 1983; Strickland and Parsons, 1984; APHA, 2005)

  • Results and DiscussionWater quality parameters

    * One-way ANOVA

  • Results and DiscussionWater quality parameters

    * Repeated measures ANOVA

  • Results and DiscussionPerformance

    * One-way ANOVA

  • Conclusion

    Biofloc system using fixed C:N ratio of 12.5:1 is suitablefor hatchery of L. vannamei (from M1 to PL5), becauseit could facilitate pond management in comparison tothe carbon addition dependent on ammoniaconcentration, and spend less carbon source thanhigher C:N ratios.

  • Acknowledgments

  • Thank your atention!!

    Delano Dias Schleder, Msc.delano.schleder@ifc-araquari.edu .br

    *55-47-99210007

    PACIFIC WHITE SHRIMP HATCHERY IN BIOFLOC SYSTEMIntroductionIntroductionIntroductionObjectiveMethodologyMethodologyMethodologyResults and DiscussionResults and DiscussionResults and DiscussionConclusionAcknowledgments Thank your atention!!

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