Intro to shellfish/microalgae

Question 1

how old are the middens on gabriola/deep bay?

Answer 1

5000ya

Question 2

how long has pac oyster been introduced?

Answer 2

1905

Question 3

who are the major players for shellfish industry?

who are the owners?

Answer 3

• taylor shellfish (?)
• macs oysters (Gordy McLellan)
• island scallops (Rob Saunders)
• odyssey shellfish (Keith Reid)

Question 4

what does BCSGA stand for?

Answer 4

BC shellfish growers association

Question 5

name problems associated with the shellfish industry

Answer 5

• waste
• coliform
• algae
• exotic species
• predators
• hatcheries

Question 6

what are the two general types of algae did we look at?

-name the supergroup, kingdom, phylum,class, name

Answer 6

• Supergroup Chromalveolata
• Kingdom Chromista
• Stramenopiles, Phylum Heterokontophyta, Class Bacillariophyceae, Diatoms
• Alveolates, Phylum Dinophyta, Dinoflagellates

Question 7

micro algae manufacture organic cellular components from the uptake of:

Answer 7

CO2
nutrients contained in seawater
Use light as an energy source (photosynthesis)

Question 8

raising micro algae is what percent of costs for rearing bivalve seeds?

Answer 8

40%

Question 9

Cm:

• name
• type
• used for what?
• shape?

Answer 9

Chaetocerous muelleri
used for all stage bivalve
diatom
barrel shaped, 4 spines

Question 10

Cc:

• name
• type
• used for what?
• shape?

Answer 10

C. calcitrans

• diatom
• very small/young larvae
• reddish brown/4 spines

Question 11

Sk:

• name
• type
• used for what
• appearance

Answer 11

Skeletonema costatum

• diatom
• broodstock (oyster)
• chains, reddish brown

Question 12

Name the 4 type of diatoms (abbreviations ok)

Answer 12

• Cm
• Cc
• Sk
• 3H (Thalassiosira pseudonana)

Question 13

frustule

Answer 13

exterior shell of a diatom

Question 14

Name the abbreviations for flagellates (5)

Answer 14

Tiso (isochrysis)
Pav (Pavlova)
Ts (Tetraselmis)
Dtert (Dunaliella)
Rhodo (Rhodo)

Question 15

T-iso

• name
• type
• appearance
• used for what?

Answer 15

Isochrysis sp, Tahitian strain

• flagellate
• 2 flagella, swims in circles, golden
• bivalves, rotifers, artemia, penaeid shrimp

Question 16

Pav

• name
• type
• appearance
• used for what?

Answer 16

Pavlova lutherii

• flagellate
• green/golden brown
• bivalves, artemia, rotifers

Question 17

Ts

• name
• type
• appearance
• used for what?

Answer 17

Tetraselmis suecica

• flagellate
• green grass, 4 flagella
• weed species

Question 18

Dtert

• name
• type
• appearance
• used for what?

Answer 18

Dunaliella tertiolecta

• flagellate
• no chains
• no nutrition
• no worries

Question 19

Rhodo

• name
• type
• appearance
• used for what?

Answer 19

Rhodomonas salina

• flagellate
• red/rose
• pelagic copepods

Question 20

name the 4 sizes of algae culture, and include the vessel size

Answer 20

• Stock culture >250ml
• Starter 250-4L
• Intermediate 4L-20L
• Large scale culture >50L

Question 21

seawater should be filtered to what size for algae culture? what about salinity?

Answer 21

0.2um

27-30ppt

Question 22

name the 7 essential elements for culturing algae

Answer 22

• seawater
• autoclave
• nutrients
• inoculum
• CO2
• full spectrum light
• temperature (18-22)

Question 23

name the 4 phases of algae growth, and the time frame associated with it

Answer 23

• lag phase (2-3 d)
• exponential phase (4-6 d)
• stationary phase (…)
• crash

Question 24

when labeling algae, what do you include on the label?

Answer 24

• species
• transfer number
• date of previous transfer
• date of transfer