Once the eggs have been successfully re-hydrated, acclimatized, and disinfected, the counting should be carried out.
Once the eggs have been successfully re-hydrated, acclimatized, and disinfected, the counting should be carried out. There are several methods of estimation of eggs, but the most recommended is the Von Bayer trough method, as it is quick, simple and utilizes a trout egg measuring trough, easily made but also available from Troutlodge on request. The trough measures 30.5cm (12") length (inside dimension), with a 45º bend and a depth of approximately 3.5cm (1.4").
On the following pages, Von Bayer estimation method can be found, including:
Number of Eggs per 12" Trough
Diameter of Eggs (Inches)
Diameter of Eggs (mm)
Number of Eggs per Liquid Quart
Number of Eggs per Liter
Number of Eggs per Liquid Ounce
35
0.343
8.712
1,677
1,772
52
36
0.333
8.458
1,833
1,937
57
37
0.324
8.230
1,990
2,103
62
38
0.316
8.026
2,145
2,267
67
39
0.308
7.823
2,316
2,448
72
40
0.300
7.620
2,606
2,754
81
41
0.292
7.417
2,690
2,843
84
42
0.286
7.264
2,893
3,057
90
43
0.279
7.087
3,116
3,293
97
44
0.273
6.934
3,326
3,515
104
45
0.267
6.782
3,556
3,758
111
46
0.261
6.629
3,806
4,022
119
47
0.255
6.477
4,081
4,313
128
48
0.250
6.350
4,331
4,577
135
49
0.245
6.223
4,603
4,864
144
50
0.240
6.096
4,895
5,173
153
51
0.235
5.969
5,214
5,510
163
0.231
5.867
5,490
5,802
172
53
0.226
5.740
5,862
6,195
183
54
0.222
5.639
6,185
6,536
193
55
0.218
5.537
6,531
6,902
204
56
0.214
5.436
6,905
7,297
216
0.211
5.359
7,204
7,613
225
58
0.207
5.258
7,630
8,063
238
59
0.203
5.156
8,089
8,548
253
60
0.200
5.080
8,459
8,939
264
61
0.197
5.004
8,851
9,354
277
0.194
4.928
9,268
9,794
290
63
0.191
4.851
9,712
10,264
304
64
0.188
4.775
10,184
10,762
318
65
0.185
4.699
10,638
11,242
332
66
0.182
4.623
11,225
11,863
351
0.179
4.547
11,799
12,469
369
68
0.177
4.496
12,203
12,896
381
69
0.174
4.420
12,846
13,574
401
70
0.171
4.343
13,533
14,302
423
71
0.169
4.293
14,020
14,816
438
0.167
4.242
14,529
15,354
454
73
0.164
4.166
15,341
16,212
479
74
0.162
4.115
15,916
16,820
497
75
0.160
4.064
16,621
17,565
519
76
0.158
4.013
17,157
18,132
536
77
0.156
3.962
17,825
18,837
557
78
0.154
3.912
18,528
19,580
579
79
0.152
3.861
19,270
20,365
602
Table 1. Von Bayer Chart for the estimation of the number of eggs
Other egg counting methods include:
Volumetric method
This consists of measuring 10 ml of eggs by water displacement, counting the number of eggs and repeating the procedure to get the average number of eggs in that 10 ml. Then multiply this number by 100 to calculate the number of eggs per liter. Next, determine the total volume of eggs. The final estimated number of eggs will be equal to the number of eggs calculated per liter multiplied by the total volume of eggs in liters. If you have trained staff available, you can do the same with 20 ml or more. This takes more time and handling but will give you a more accurate number.
Egg weighted using an egg counting pallet
In this method, eggs are individually placed on a tray with a specific number of egg-sized holes. This quantity of eggs is then weighed to get an average weight per egg. Finally, the total number of eggs is weighed and then divided by the average weight per egg to get an approximation of the total amount of eggs.
The general workflow would be:
Finally, remember that this method is an estimate of the total number of eggs. That is, it is not exact, it is an approximation. For this reason, it is recommended to average the value of the estimate with the value of another estimate such as the Von Bayer method.
Counting Eggs- Q-sorter
In the past, Troutlodge has depended on volumetric measurements, such as the Von Bayer Method, to numerate eggs for both internal and external purposes. As with many of our operations, technology and modern manufacturing has brought forth new equipment to make methods more accurate and efficient. In 2016, Troutlodge incorporated the use of an automatic, counting and sorting machine for trout eggs: Q-sorter, as part of our egg processing and shipping operations.
Description:
Note: "Tamaño" means "Size"
Counting and Sorting- Maximum Accuracy and Reliability.
Counting eggs has to be not only gentle but accurate; we have that with the implemented technology based on computing vision. This technology ensures that no egg can “escape” the machine's "eyes". Every single egg is visualised by high definition cameras thanks to a sophisticated mechatronic device that holds and transports the embryonated eggs through the inspection zone. So, every single egg is identified, therefore counted and the data is sent to the sorting system, which is then able to separate the good eggs (eyed egg) from the bad eggs (non-embryonated or dead).
The operator visualizes at real time, at a speed of approx. 1.5M eggs/hr., how many eggs are being counted and so, the machine is able to stop when the desired quantity is reached (e.g.: 1.7M Eggs). The system has been engineered and manufactured in order to provide the highest level of reliability, accuracy, processing speed, and gentle manipulation of the eggs. The whole process of counting and sorting is totally automatized and a log is generated after every batch to ensure traceability. Even so, the counting is periodically tested in order to ensure a product totally free of counting error. We are proud to state that the technology in use is the most accurate and fast technology on the market.