THE PRESENT STATUS OF SOME ASPECTS OF MAR.INH~ MICROBXOLOOY
161
gutted fish, stored in crushed ice, the usual commercial practice in this
country and for which most data are available.
By the use of ice as a preservative the rate of growth of the bacteria
originally present on the fish is dclayed or slowed down. Even 80,
after a few days storage the lag phase of growth passes into the
logarithmic phase, which by the 12th to 14th day, when the count
per gram has increased by somc thousand to ten thousand times, passes
into the stationary phnse and thence to the phase of logarithmic decline.
t
TABLE V
CHANQES IN TFLB NUMBERS OF DIFFERENT BACTERIA ON TEE SKIN OP FISH
S T O W E D AT 0-1.5' FOR V A R I O U S 1'ERIOI)S DITHINO EXPEDITION 1, JUNE 1959
A N D EXPEDITION 2, SEPTEMDER 1959. AS 1'EHCENTAOE OF TEE TOTAL NUMBERS
I N VEST1 O ATED
(Shewan et al., 1960b)
Genus
June
September
Fiahing
andlor
0
5 10 15
0
5 10 16 20
ground
kind of
Days in Ice
Daya in Ice
bacteria
Pseudomonas
nonfluoroacent
fluorescent
Achromobacter
Flavobacterium
North Sea
-/
Coryneforms
Micrococcus
Unidont ified
Pseudomonas
nonfluorescen t
fluorescent
Achromobacter
Flavobacterium
Faroes
Coryneforms
Micrococcus
Unident ifled
Pseudomonas
c fluorescent
nonfluorescent
Achromobacter
Flavobacterium
North Sea
-/
Coryneforms
Micrococcus
Unidentified
12 6 45 62
2 11 5 20
33 49 38 14
4
0
0
2
41 33 12 2
8
1
0
0
0
0
0
0
11 66 45 79
0 18 5 11
59 13 31 0
1
0
3
1
2 0 2 9 6
9 1 7 2
0 0 0 2
26 18 61 71
0 15 13 11
33 26 7 13
0
8
0
0
25 12 8 3
14 21 0 0
2 0 1 2
35 50 31 32 45
0 1 0 1 6
24 41 46 38 9
1 2 0 14 20
22 5 18 8 14
1 8 1 6 7 6
0 0 0 0 1
26 23 20 42 38
0 24 4
3 10
19 26 26 13 10
4
1 0 2 6 5
48 17 25 7 23
3 8 26 8 10
0 1 0 1 4
30 39 48 69 68
0 11 16 21 9
32 34 6 6 16
1 0 2 1 6 4
25 23 I6 9 3
0
1 1 1 0
0
3
1
2
1
1
161
gutted fish, stored in crushed ice, the usual commercial practice in this
country and for which most data are available.
By the use of ice as a preservative the rate of growth of the bacteria
originally present on the fish is dclayed or slowed down. Even 80,
after a few days storage the lag phase of growth passes into the
logarithmic phase, which by the 12th to 14th day, when the count
per gram has increased by somc thousand to ten thousand times, passes
into the stationary phnse and thence to the phase of logarithmic decline.
t
TABLE V
CHANQES IN TFLB NUMBERS OF DIFFERENT BACTERIA ON TEE SKIN OP FISH
S T O W E D AT 0-1.5' FOR V A R I O U S 1'ERIOI)S DITHINO EXPEDITION 1, JUNE 1959
A N D EXPEDITION 2, SEPTEMDER 1959. AS 1'EHCENTAOE OF TEE TOTAL NUMBERS
I N VEST1 O ATED
(Shewan et al., 1960b)
Genus
June
September
Fiahing
andlor
0
5 10 15
0
5 10 16 20
ground
kind of
Days in Ice
Daya in Ice
bacteria
Pseudomonas
nonfluoroacent
fluorescent
Achromobacter
Flavobacterium
North Sea
-/
Coryneforms
Micrococcus
Unidont ified
Pseudomonas
nonfluorescen t
fluorescent
Achromobacter
Flavobacterium
Faroes
Coryneforms
Micrococcus
Unident ifled
Pseudomonas
c fluorescent
nonfluorescent
Achromobacter
Flavobacterium
North Sea
-/
Coryneforms
Micrococcus
Unidentified
12 6 45 62
2 11 5 20
33 49 38 14
4
0
0
2
41 33 12 2
8
1
0
0
0
0
0
0
11 66 45 79
0 18 5 11
59 13 31 0
1
0
3
1
2 0 2 9 6
9 1 7 2
0 0 0 2
26 18 61 71
0 15 13 11
33 26 7 13
0
8
0
0
25 12 8 3
14 21 0 0
2 0 1 2
35 50 31 32 45
0 1 0 1 6
24 41 46 38 9
1 2 0 14 20
22 5 18 8 14
1 8 1 6 7 6
0 0 0 0 1
26 23 20 42 38
0 24 4
3 10
19 26 26 13 10
4
1 0 2 6 5
48 17 25 7 23
3 8 26 8 10
0 1 0 1 4
30 39 48 69 68
0 11 16 21 9
32 34 6 6 16
1 0 2 1 6 4
25 23 I6 9 3
0
1 1 1 0
0
3
1
2
1
1