Microalgae in aquaculture

Pablo Gonzalez-Alanis

Microalgae in aquaculture• Manage a body of

water• Provide more food• Chemical fertilizers,

organic materials (manures), suplemetary diet

Microalgae in aquaculture

•Successful colonization•Light to provide energy•Inorganic nutrients•Water Temperature

Microalgae in aquaculture• Bacillariophyta• Cyanophyta• Dinophyta• Euglenophyta

Microalgae in aquaculture

• Experiment objective:– Observe the changes in the

phytoplankton colony in a shrimp tank

Microalgae in aquaculture

• Samples collection

• Cell counting

• Identification

Samples collection• 3 tanks made of

plastic liner (23 m2

aprox)

• 50 shrimps/ m2

• Commercial pelleted feed (25 % of total shrimp biomass) daily

Samples collection

• Collected weekly • Analyzed

(identificated and counted)

Cell counting• Standar compound

microscope with 10, 20 and 40 X magnification objectives

• Haemacytometer

Cell counting

Identification• Key to the major

groups (Divisions) of phytoplankton in northern Queensland prawn ponds (after Bellinger 1992) Stafford C. 1999.

Results

• Synechocystis

Results

• Coscinodiscuss

Results

• Gymnodium

Results

• Navicula

Results

• Agmenellum

Algae by genera, 87 F, sunny, tq 1

0

5

10

1

Genera

# of

org

anis

ms Sinechocystis

Coscinodiscuss

Gymnodium

Prorocentrum

Algae by genera, 87F, sunny, tq 2

02468

1

Genera

# of

org

anis

ms Sinechocystis

Coscinodiscuss

Surirella

Bellerochea

Algae by genera, 78 F, clouds tq 1

0

5

10

1

Genera

# of

org

anis

ms

Sinechocystis

Coscinodiscuss

Navicula

Agmenellum

Algae by genera, 78 F, clouds tq 2

02468

1

Genera

# of

org

anis

ms Sinechocystis

Navicula

Agmenellum

Thanks...