oyster Flashcards
1
Q
scientific name of oyster
A
Crassostrea gigas; Ostrea; Pyncnodonta
2
Q
protandry - if there is good food supply
A
female
3
Q
optimal salinity range
A
20-25 ppt
4
Q
temperature tolerance
A
-1.8 to 35 C
5
Q
spawning temperature
A
20 C
6
Q
Gametogenesis
A
10 C; 15-32 ppt
7
Q
fecundity size (female)
A
8-15 cm length
8
Q
eggs produced in single spawning
A
50-200 million
9
Q
oyster food
A
phytoplankton (diatoms & dinoflagellates)
copepod larvae
protozoans
detritus
10
Q
species of oyster cultured in the Philippines
A
Crassostrea iredalei
11
Q
oyster collecting device
A
cultches
12
Q
oyster species cultured in the Philippines
A
C. iredalei
C. cucullata
C. malabonensis
C. palmipes
13
Q
farming methods
A
stake
hanging method
14
Q
culture period
A
6-8 months
15
Q
market
A
shell on
shucked
16
Q
problem caused by oyster culture
A
rapid siltation and pollution of the bays and estuaries
