| Lindem Data Acquisition | Filename : FADEXP02 |
| University of Jyvaskyla |
ECHOANALYSIS: exp.on light attraction
DATE: 17/04/89 DATA FROM TRANSECT : ping from 6650–7600
ECHOSOUNDER : EY-M
REMARKS: tape 2a000 2b460
NUMBER OF PINGS ANALYZED : 950. START AT PING NO. 6650
IN 4 DEPTHLAYERS FROM 2 TO 50 METERS.
CALCULATED MEAN FISH DENSITY ALONG TRANSECT: 26878 FISH/HECTARE.
| DEPTH METERS | REGISTRATION SINGLE FISH | INTEGRAL SINGLE FISH | INTEGRAL SCHOOLS | TOTAL FISHDENSITY |
| 2–14 | 1914 F/HA | 2.1966E+06 | 1.7221E+07 | 16922 FISH/HA |
| 14–26 | 977 F/HA | 3.0752E+06 | 2.4180E+07 | 8663 FISH/HA |
| 26–38 | 297 F/HA | 2.8615E+06 | 8.0339E+06 | 1132 FISH/HA |
| 38–50 | 123 F/HA | 9.4160E+05 | 2.8910E+05 | 161 FISH/HA |
FISH DENSITY SPLIT INTO 3 SIZEGROUPS.
(CALCULATED WITH DATA FROM SINGLEFISH-ECHOES.)
| TS 44–50 DB: | SINGLE FISH | RES. | TOTAL. | |
| DEPTH: | 2 – 14 METERS | 961 FISH/HA | 11.3 % | 8493 FISH/HA |
| DEPTH: | 14 – 26 METERS | 391 FISH/HA | 11.3 % | 3462 FISH/HA |
| DEPTH: | 26 – 38 METERS | 130 FISH/HA | 26.3 % | 497 FISH/HA |
| DEPTH: | 38 – 50 METERS | 30 FISH/HA | 76.5 % | 40 FISH/HA |
| TOTAL: | 12490 FISH/HA | |||
| TS 51–59 DB: | SINGLE FISH | RES. | TOTAL. | |
| DEPTH: | 2 – 14 METERS | 961 FISH/HA | 11.3 % | 8499 FISH/HA |
| DEPTH: | 14 – 26 METERS | 587 FISH/HA | 11.3 % | 5201 FISH/HA |
| DEPTH: | 26 – 38 METERS | 167 FISH/HA | 26.3 % | 635 FISH/HA |
| DEPTH: | 38 – 50 METERS | 102 FISH/HA | 76.5 % | 133 FISH/HA |
| TOTAL: | 14469 FISH/HA | |||
| TS 60–62 DB: | SINGLE FISH | RES. | TOTAL. | |
| DEPTH: | 2 – 14 METERS | 0 FISH/HA | 0.0 % | 0 FISH/HA |
| DEPTH: | 14 – 26 METERS | 0 FISH/HA | 0.0 % | 0 FISH/HA |
| DEPTH: | 26 – 38 METERS | 0 FISH/HA | 0.0 % | 0 FISH/HA |
| DEPTH: | 38 – 50 METERS | 0 FISH/HA | 0.0 % | 0 FISH/HA |
| TOTAL : | 0 FISH/HA | |||
ALL SINGLE FISH ECHOES GREATER THAN TS=-38 DB ARE TRUNCATED
AND SHIFTED DOWN INTO THE -38 DB SIZEGROUP.
IF FISH DENSITY IN A DEPTHLAYER IS FOLLOWED BY A :
“?” : THE NUMBER OF SINGLE FISH ECHOES IS TOO LOW AND THE CALCULATED
DENSITY HAS POOR ACCURACY!
“**”: TOO MANY MULTIPLE ECHOES, ROUNDING ERRORS MAY OCCUR DUE TO
INTEGER PRESENTATION OF REAL VARIABLES.…!!
ECHOSIGNALS FROM TRANSECT : ping from 6650–7600
DEPTH LAYER : 2 – 14 METERS. CALCULATED MEAN DEPTH: 14 METERS.
NUMBER OF PINGS ANALYSED : 950 OUT OF 950. START NO.: 6650
BOTTOM HAS BLOCKED UP 0 PINGS IN THIS DEPTHLAYER.
SINGLEFISH RESOLUTION IN DEPTHLAYER : 11.3 %.
INTEGRATED VALUE FROM SCHOOLS : 1.7221E+07
| TS(DB): | ECHO-NUMBER: | VOLUME DENSITY, FISH/1000 M**3: | AREA DENSITY, FISH/HECTARE: | TR VAL: | TS VAL: |
| -44 | 1 | 1.043 | 125 | 0.0558 | 6400 |
| -46 | 4 | 3.168 | 380 | 0.0782 | 5080 |
| -48 | 9 | 5.376 | 645 | 0.0948 | 4040 |
| -50 | 25 | 17.059 | 2047 | 0.1084 | 3200 |
| -52 | 32 | 8.310 | 997 | 0.1199 | 2560 |
| -54 | 65 | 35.816 | 4298 | 0.1300 | 2000 |
| -56 | 60 | 0.000 | 0 | 0.1389 | 1600 |
| -58 | 101 | 43.122 | 5175 | 0.1468 | 1280 |
| -60 | 123 | 27.124 | 3255 | 0.1539 | 1000 |
| -62 | 115 | 0.000 | 0 | 0.1603 | 800 |
| SINGLE FISH: | 535 | TOTAL: | 16922 FISH/HA. |
RELATIVE SIZEDISTRIBUTION OF FISH.
(THE NUMBERS GIVE PERCENTAGE OF TOTAL DENSITY)
ECHOSIGNALS FROM TRANSECT : ping from 6650–7600
DEPTH LAYER : 14 – 26 METERS. CALCULATED MEAN DEPTH: 26 METERS.
NUMBER OF PINGS ANALYSED : 950 OUT OF 950. START NO.: 6650
BOTTOM HAS BLOCKED UP 0 PINGS IN THIS DEPTHLAYER.
SINGLEFISH RESOLUTION IN DEPTHLAYER : 11.3 %.
INTEGRATED VALUE FROM SCHOOLS : 2.4180E+07
| TS(DB): | ECHO-NUMBER: | VOLUME DENSITY, FISH/1000 M**3: | AREA DENSITY, FISH/HECTARE: | TR VAL: | TS VAL: |
| -44 | 3 | 0.579 | 69 | 0.0558 | 6400 |
| -46 | 0 | 0.000 | 0 | 0.0782 | 5080 |
| -48 | 6 | 0.624 | 75 | 0.0948 | 4040 |
| -50 | 17 | 2.166 | 260 | 0.1084 | 3200 |
| -52 | 47 | 5.920 | 710 | 0.1199 | 2560 |
| -54 | 89 | 8.452 | 1014 | 0.1300 | 2000 |
| -56 | 143 | 11.106 | 1333 | 0.1389 | 1600 |
| -58 | 152 | 2.849 | 342 | 0.1468 | 1280 |
| -60 | 256 | 21.321 | 2559 | 0.1539 | 1000 |
| -62 | 345 | 19.176 | 2301 | 0.1603 | 800 |
| SINGLE FISH: | 1058 | TOTAL: | 8663 FISH/HA. |
RELATIVE SIZEDISTRIBUTION OF FISH.
(THE NUMBERS GIVE PERCENTAGE OF TOTAL DENSITY)
ECHOSIGNALS FROM TRANSECT : ping from 6650–7600
DEPTH LAYER : 26 – 38 METERS. CALCULATED MEAN DEPTH: 38 METERS.
NUMBER OF PINGS ANALYSED : 950 OUT OF 950. START NO.: 6650
BOTTOM HAS BLOCKED UP 0 PINGS IN THIS DEPTHLAYER.
SINGLEFISH RESOLUTION IN DEPTHLAYER : 26.3 %.
INTEGRATED VALUE FROM SCHOOLS : 8.0339E+06
| TS(DB): | ECHO-NUMBER: | VOLUME DENSITY, FISH/1000 M**3: | AREA DENSITY, FISH/HECTARE: | TR VAL: | TS VAL: |
| -44 | 0 | 0.000 | 0 | 0.0558 | 6400 |
| -46 | 2 | 0.066 | 8 | 0.0782 | 5080 |
| -48 | 5 | 0.101 | 12 | 0.0948 | 4040 |
| -50 | 16 | 0.369 | 44 | 0.1084 | 3200 |
| -52 | 36 | 0.679 | 82 | 0.1199 | 2560 |
| -54 | 110 | 2.486 | 298 | 0.1300 | 2000 |
| -56 | 119 | 0.436 | 52 | 0.1389 | 1600 |
| -58 | 185 | 2.343 | 281 | 0.1468 | 1280 |
| -60 | 259 | 2.680 | 322 | 0.1539 | 1000 |
| -62 | 256 | 0.269 | 32 | 0.1603 | 800 |
| SINGLE FISH: | 988 | TOTAL: | 1132 FISH/HA. |
RELATIVE SIZEDISTRIBUTION OF FISH.
(THE NUMBERS GIVE PERCENTAGE OF TOTAL DENSITY)
ECHOSIGNALS FROM TRANSECT : ping from 6650–7600
DEPTH LAYER : 38 – 50 METERS. CALCULATED MEAN DEPTH: 50 METERS.
NUMBER OF PINGS ANALYSED : 950 OUT OF 950. START NO.: 6650
BOTTOM HAS BLOCKED UP 0 PINGS IN THIS DEPTHLAYER.
SINGLEFISH RESOLUTION IN DEPTHLAYER : 76.5 %.
INTEGRATED VALUE FROM SCHOOLS : 2.8910E+05
| TS(DB): | ECHO-NUMBER: | VOLUME DENSITY, FISH/1000 M**3: | AREA DENSITY, FISH/HECTARE: | TR VAL: | TS VAL: |
| -44 | 0 | 0.000 | 0 | 0.0558 | 6400 |
| -46 | 0 | 0.000 | 0 | 0.0782 | 5080 |
| -48 | 0 | 0.000 | 0 | 0.0948 | 4040 |
| -50 | 0 | 0.000 | 0 | 0.1084 | 3200 |
| -52 | 4 | 0.024 | 3 | 0.1199 | 2560 |
| -54 | 18 | 0.085 | 10 | 0.1300 | 2000 |
| -56 | 54 | 0.221 | 26 | 0.1389 | 1600 |
| -58 | 81 | 0.175 | 21 | 0.1468 | 1280 |
| -60 | 160 | 0.495 | 59 | 0.1539 | 1000 |
| -62 | 211 | 0.345 | 41 | 0.1603 | 800 |
| SINGLE FISH: | 528 | TOTAL: | 161 FISH/HA. |
RELATIVE SIZEDISTRIBUTION OF FISH.
(THE NUMBERS GIVE PERCENTAGE OF TOTAL DENSITY)
