| Lindem Data Acquisition | Filename : 890101 |
| University of Jyvaskyla |
ECHOANALYSIS: Lac Kivu
DATE : 03/04/89 DATA FROM TRANSECT : Transect 1
ECHOSOUNDER : EY-M
REMARKS: tape la108 2a203
NUMBER OF PINGS ANALYZED : 6720. START AT PING NO. 0
IN 4 DEPTHLAYERS FROM 2 TO 58 METERS.
CALCULATED MEAN FISH DENSITY ALONG TRANSECT: 11425 FISH/HECTARE.
| DEPTH METERS | REGISTRATION SINGLE FISH | INTEGRAL SINGLE FISH | INTEGRAL SCHOOLS | TOTAL FISHDENSITY |
| 2–16 | 361 F/HA | 1.0184E+06 | 9.0241E+06 | 3563 FISH/HA |
| 16–30 | 166 F/HA | 2.5767E+06 | 2.9774E+07 | 2082 FISH/HA |
| 30–44 | 257 F/HA | 1.3531E+07 | 1.8846E+08 | 3836 FISH/HA |
| 44–58 | 185 F/HA | 1.5200E+07 | 1.4479E+08 | 1944 FISH/HA |
FISH DENSITY SPLIT INTO 3 SIZEGROUPS.
( CALCULATED WITH DATA FROM SINGLEFISH-ECHOES. )
| TS 44–50 DB: | SINGLE FISH | RES. | TOTAL. | |
| DEPTH: | 2 – 16 METERS | 122 FISH/HA | 10.1 % | 1204 FISH/HA |
| DEPTH: | 16 – 30 METERS | 55 FISH/HA | 8.0 % | 687 FISH/HA |
| DEPTH: | 30 – 44 METERS | 131 FISH/HA | 6.7 % | 1951 FISH/HA |
| DEPTH: | 44 – 58 METERS | 80 FISH/HA | 9.5 % | 846 FISH/HA |
| TOTAL : | 4688 FISH/HA | |||
| TS 51–59 DB: | SINGLE FISH | RES. | TOTAL. | |
| DEPTH: | 2 – 16 METERS | 239 FISH/HA | 10.1 % | 2359 FISH/HA |
| DEPTH: | 16 – 30 METERS | 111 FISH/HA | 8.0 % | 1398 FISH/HA |
| DEPTH: | 30 – 44 METERS | 126 FISH/HA | 6.7 % | 1885 FISH/HA |
| DEPTH: | 44 – 58 METERS | 118 FISH/HA | 9.5 % | 1238 FISH/HA |
| TOTAL : | 6879 FISH/HA | |||
| TS 60–62 DB: | SINGLE FISH | RES. | TOTAL. | |
| DEPTH: | 2 – 16 METERS | 0 FISH/HA | 0.0 % | 0 FISH/HA |
| DEPTH: | 16 – 30 METERS | 0 FISH/HA | 0.0 % | 0 FISH/HA |
| DEPTH: | 30 – 44 METERS | 0 FISH/HA | 0.0 % | 0 FISH/HA |
| DEPTH: | 44 – 58 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 FULLOWED BY A :
“?” : THE NUMBER OF SINGLE FISH ECHOES TS TOO LOW AND THE CALCULATE
DENSITY HAS FOOR ACCURACY!
“**” : TOO MANY MULTIPLE ECHOES. ROUNDING ERRORS MAY OCCUR DUE TO
INTEGER PRESENTATION OF REAL VARIABLES....!!
ECHOSIGNALS FROM TRANSECT : Transect 1
DEPTH LAYER : 2 – 16 METERS. CALCULATED MEAN DEPTH: 16 METERS.
NUMBER OF PINGS ANALYSED : 3780 OUT OF 6720. START NO.: 0
BOTTOM HAS BLOCKED UP 2940 PINGS IN THIS DEPTHLAYER.
SINGLEFISH RESOLUTION IN DEPTHLAYER : 10.1 %.
INTEGRATED VALUE FROM SCHOOLS : 9.0241E+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 | 0 | 0.000 | 0 | 0.0782 | 5080 |
| -48 | 5 | 0.979 | 137 | 0.0948 | 4040 |
| -50 | 8 | 0.623 | 87 | 0.1084 | 3200 |
| -52 | 12 | 0.847 | 119 | 0.1199 | 2560 |
| -54 | 24 | 2.440 | 342 | 0.1300 | 2000 |
| -56 | 42 | 3.713 | 520 | 0.1389 | 1600 |
| -58 | 53 | 2.481 | 347 | 0.1468 | 1280 |
| -60 | 104 | 10.414 | 1458 | 0.1539 | 1000 |
| -62 | 120 | 3.952 | 553 | 0.1603 | 800 |
| SINGLE FISH: | 368 | TOTAL: | 3563 FISH/HA. |
RELATIVE SIZEDISTRIBUTION OF FISH.
(THE NUMBERS GIVE PERCENTAGE OF TOTAL DENSITY)
ECHOSIGNALS FROM TRANSECT : Transect 1
DEPTH LAYER : 16 – 30 METERS. CALCULATED MEAN DEPTH: 30 METERS.
NUMBER OF PINGS ANALYSED : 3780 OUT OF 6720. START NO.: 0
BOTTOM HAS BLOCKED UP 2940 PINGS IN THIS DEPTHLAYER.
SINGLEFISH RESOLUTION IN DEPTHLAYER : 8.0 %.
INTEGRATED VALUE FROM SCHOOLS : 2.9774E+07
| 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 | 5 | 0.222 | 31 | 0.0948 | 4040 |
| -50 | 20 | 0.675 | 95 | 0.1084 | 3200 |
| -52 | 27 | 0.345 | 48 | 0.1199 | 2560 |
| -54 | 86 | 2.673 | 374 | 0.1300 | 2000 |
| -56 | 105 | 0.991 | 139 | 0.1389 | 1600 |
| -58 | 159 | 2.600 | 364 | 0.1468 | 1280 |
| -60 | 272 | 5.303 | 742 | 0.1539 | 1000 |
| -62 | 307 | 2.063 | 289 | 0.1603 | 800 |
| SINGLE FISH: | 981 | TOTAL: | 2082 FISH/HA. |
RELATIVE SIZEDISTRIBUTION OF FISH.
(THE NUMBERS GIVE PERCENTAGE OF TOTAL DENSITY)
ECHOSIGNALS FROM TRANSECT : Transect 1
DEPTH LAYER : 30 – 44 METERS. CALCULATED MEAN DEPTH: 44 METERS.
NUMBER OF PINGS ANALYSED : 3780 OUT OF 6720. START NO.: 0
BOTTOM HAS BLOCKED UP 2940 PINGS IN THIS DEPTHLAYER.
SINGLEFISH RESOLUTION IN DEPTHLAYER : 6.7 %.
INTEGRATED VALUE FROM SCHOOLS : 1.8846E+08
| TS(DB): | ECHO-NUMBER: | VOLUME DENSITY, FISH/1000 M**3: | AREA DENSITY, FISH/HECTARE: | TR VAL: | TS VAL: |
| -44 | 1 | 0.021 | 3 | 0.0558 | 6400 |
| -46 | 6 | 0.105 | 15 | 0.0782 | 5080 |
| -48 | 25 | 0.400 | 56 | 0.0948 | 4040 |
| -50 | 78 | 1.123 | 157 | 0.1084 | 3200 |
| -52 | 206 | 2.727 | 382 | 0.1199 | 2560 |
| -54 | 468 | 5.619 | 787 | 0.1300 | 2000 |
| -56 | 639 | 3.941 | 552 | 0.1389 | 1600 |
| -58 | 824 | 4.395 | 615 | 0.1468 | 1280 |
| -60 | 1106 | 6.574 | 920 | 0.1539 | 1000 |
| -62 | 1179 | 2.493 | 349 | 0.1603 | 800 |
| SINGLE FISH: | 4532 | TOTAL: | 3836 FISH/HA. |
RELATIVE SIZEDISTRIBUTION OF FISH.
(THE NUMBERS GIVE PERCENTAGE OF TOTAL DENSITY)
ECHOSIGNALS FROM TRANSECT : Transect 1
DEPTH LAYER : 44 – 58 METERS. CALCULATED MEAN DEPTH: 57 METERS.
NUMBER OF PINGS ANALYSED : 3780 OUT OF 6720. START NO.: 0
BOTTOM HAS BLOCKED UP 2940 PINGS IN THIS DEPTHLAYER.
SINGLEFISH RESOLUTION IN DEPTHLAYER : 9.5 %.
INTEGRATED VALUE FROM SCHOOLS : 1.4479E+08
| 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 | 15 | 0.133 | 17 | 0.0782 | 5080 |
| -48 | 35 | 0.183 | 24 | 0.0948 | 4040 |
| -50 | 84 | 0.448 | 58 | 0.1084 | 3200 |
| -52 | 190 | 0.972 | 126 | 0.1199 | 2560 |
| -54 | 497 | 2.798 | 364 | 0.1300 | 2000 |
| -56 | 700 | 1.977 | 257 | 0.1389 | 1600 |
| -58 | 894 | 1.982 | 258 | 0.1468 | 1280 |
| -60 | 1358 | 4.453 | 579 | 0.1539 | 1000 |
| -62 | 1527 | 2.008 | 261 | 0.1603 | 800 |
| SINGLE FISH: | 5300 | TOTAL: | 1944 FISH/HA. |
RELATIVE SIZEDISTRIBUTION OF FISH.
(THE NUMBERS GIVE PERCENTAGE OF TOTAL DENSITY)
