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...