HOME
ANALYSES AND VISUALIZATION
PUBLICATIONS
NEWS AND ABOUT
COLLABORATIONS
CONTACT US
Marine Trophic Index in LME: Benguela Current
Compute regression
Start year:
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
End year:
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
Compute regression
Start year:
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
End year:
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
Show/Hide tabular data
Year
Mean trophic level
Mean max. length (cm)
FiB Index
Expansion factor
1950
3.06
56.8
0
1
1951
3.05
52.9
0.37
1.45
1952
2.89
47.9
0.19
1.21
1953
2.9
48.8
0.24
1.27
1954
2.95
49.5
0.37
1.45
1955
2.98
50.3
0.53
1.7
1956
2.95
43.9
0.74
2.1
1957
2.88
41.9
0.63
1.88
1958
2.9
46
0.57
1.77
1959
2.86
44.3
0.54
1.72
1960
2.83
44.3
0.57
1.77
1961
2.8
42.8
0.64
1.9
1962
2.8
42.3
0.72
2.05
1963
2.75
40.6
0.7
2.01
1964
2.8
44
1.2
3.32
1965
2.92
50.6
1.57
4.81
1966
3.02
57.1
1.87
6.49
1967
2.99
53
1.87
6.49
1968
2.95
52.7
2.04
7.69
1969
2.96
50.2
1.95
7.03
1970
3.25
62.2
2.36
10.59
1971
3.37
66
2.57
13.07
1972
3.39
67.1
2.87
17.64
1973
3.36
62.6
2.81
16.61
1974
3.23
57.7
2.37
10.7
1975
3.26
60.8
2.76
15.8
1976
3.38
67.4
3.14
23.1
1977
3.42
64.5
3.18
24.05
1978
3.41
59.2
3.35
28.5
1979
3.39
55.7
3.04
20.91
1980
3.37
54.9
2.84
17.12
1981
3.37
55.3
2.91
18.36
1982
3.45
61
3.11
22.42
1983
3.46
61.8
3.13
22.87
1984
3.49
65.2
3.11
22.42
1985
3.48
64.7
3.07
21.54
1986
3.5
65.6
3.14
23.1
1987
3.34
52.2
3.04
20.91
1988
3.37
55.7
2.94
18.92
1989
3.44
63.5
2.86
17.46
1990
3.33
58.4
2.1
8.17
1991
3.29
54
1.88
6.55
1992
3.34
53.3
2.51
12.3
1993
3.37
56
2.63
13.87
1994
3.36
58
2.48
11.94
1995
3.39
59.1
2.5
12.18
1996
3.52
67.1
2.52
12.43
1997
3.45
63.7
2.38
10.8
1998
3.41
62.2
2.46
11.7
1999
3.39
60.9
2.44
11.47
2000
3.37
58.3
2.48
11.94
2001
3.37
60.6
2.47
11.82
2002
3.35
60.4
2.43
11.36
2003
3.36
62.2
2.49
12.06
2004
3.3
60.8
2.3
9.97
2005
3.42
63.3
2.45
11.59
2006
3.48
67.4
2.38
10.8
Show/Hide species list
Exclude
TL
SLMax(cm)
Common Name
Scientific Name
4.5
219
Bigeye tuna
Thunnus obesus
4.5
66
Benguela hake
Merluccius polli
4.5
98
Bluefish
Pomatomus saltatrix
4.5
164
Red steenbras
Petrus rupestris
4.5
164
Leerfish
Lichia amia
4.5
284
Smooth hammerhead
Sphyrna zygaena
4.5
79
John dory
Zeus faber
4.48999977111816
449
Swordfish
Xiphias gladius
4.48000001907349
246
Atlantic white marlin
Tetrapturus albidus
4.47714281082153
367
Billfishes
Istiophoridae
4.46000003814697
112
Monkfishes
Lophius
4.46000003814697
82
Cape monk
Lophius vomerinus
4.44999980926514
192
Largehead hairtail
Trichiurus lepturus
4.44999980926514
115
Shallow-water Cape hake
Merluccius capensis
4.42999982833862
376
Atlantic bluefin tuna
Thunnus thynnus
4.40999984741211
148
Kingklip
Genypterus capensis
4.40333318710327
179
Barracudas
Sphyraena
4.40000009536743
258
Atlantic sailfish
Istiophorus albicans
4.40000009536743
227
Wahoo
Acanthocybium solandri
4.40000009536743
100
Little tunny
Euthynnus alletteratus
4.38500022888184
164
Amberjacks
Seriola
4.38000011444092
346
Atlantic blue marlin
Makaira nigricans
4.36999988555908
172
Common dolphinfish
Coryphaena hippurus
4.34999990463257
108
Skipjack tuna
Katsuwonus pelamis
4.34000015258789
231
Yellowfin tuna
Thunnus albacares
4.30999994277954
136
Albacore
Thunnus alalunga
4.30999994277954
164
Cobia
Rachycentron canadum
4.28000020980835
248
Longbill spearfish
Tetrapturus pfluegeri
4.28000020980835
482
Bluntnose sixgill shark
Hexanchus griseus
4.28000020980835
392
Shortfin mako
Isurus oxyrinchus
4.2662501335144
125
Hakes
Merluccius
4.2622218132019
150
Mackerels tunas and bonitos
Scombridae
4.26000022888184
82
West African Spanish mackerel
Scomberomorus tritor
4.24176502227783
207
Requiem sharks
Carcharhinidae
4.23999977111816
289
Blue shark
Prionace glauca
4.2350001335144
60
Frigate tuna
Auxis
4.21000003814697
135
Tope shark
Galeorhinus galeus
4.21000003814697
62
Cape gurnard
Chelidonichthys capensis
4.20333337783813
140
Cusk eels
Genypterus
4.19999980926514
376
Tunas bonitos and billfishes
Scombroids
4.19999980926514
90
Atlantic bonito
Sarda sarda
4.15000009536743
150
Cutlassfishes
Trichiuridae
4.13424253463745
32
Squids
Teuthida
4.09999990463257
78
European squid
Loligo vulgaris
4.07999992370605
82
Atlantic pomfret
Brama brama
4.07999992370605
246
Oilfish
Ruvettus pretiosus
4.07882404327393
525
Ground sharks
Carcharhiniformes
4.07000017166138
164
Yellowtail amberjack
Seriola lalandi
4.05230808258057
164
Jacks and pompanos
Carangidae
4.05000019073486
729
Sharks and rays
Elasmobranchii
4.03000020980835
49
Mud sole
Austroglossus pectoralis
4.01999998092651
98
White grouper
Epinephelus aeneus
4.01749992370605
98
Snappers
Lutjanidae
4
300
Sharks rays and skates etc
Sharks or rays and chimaeras
4
150
Various sharks
Sharks rays and chimaeras
3.99000000953674
180
Conger eels
Muraenesox
3.98279094696045
190
Sea basses or groupers and fairy basslets
Serranidae
3.98000001907349
57
Orange roughy
Hoplostethus atlanticus
3.97000002861023
60
Alfonsinos
Beryx
3.96499991416931
100
Seabreams (Dentex spp)
Dentex
3.91666698455811
43
Scorpionfishes or rockfishes
Scorpaenidae
3.91417288780212
80
Cods
Gadiformes
3.91000008583069
50
Blue butterfish
Stromateus fiatola
3.89000010490417
107
Geelbeck croaker
Atractoscion aequidens
3.86999988555908
228
Southern bluefin tuna
Thunnus maccoyii
3.84999990463257
172
Silver scabbardfish
Lepidopus caudatus
3.84999990463257
90
Dusky grouper
Epinephelus marginatus
3.84349989891052
190
Groupers
Epinephelus
3.82999992370605
172
Wreckfish
Polyprion americanus
3.8199999332428
170
Southern meagre
Argyrosomus hololepidotus
3.80999994277954
39
Blackbelly rosefish
Helicolenus dactylopterus
3.80988097190857
27
Cephalopods
Cephalopoda
3.78999996185303
100
Croakers
Pseudotolithus
3.76205897331238
200
Drums or croakers
Sciaenidae
3.75500011444092
62
Southern soles
Austroglossus
3.74000000953674
200
Snoek
Thyrsites atun
3.73000001907349
70
Derbio
Trachinotus ovatus
3.72562503814697
111
Smooth-hounds
Mustelus
3.71000003814697
273
Ocean sunfish
Mola mola
3.6949999332428
66
Jack and horse mackerels
Trachurus
3.69000005722046
40
Oreos
Oreosomatidae
3.6800000667572
33
Panga seabream
Pterogymnus laniarius
3.67000007629395
99
Cusk-eels
Ophidiidae
3.67000007629395
85
Bonefish
Albula vulpes
3.65000009536743
115
Medusafishes
Centrolophidae
3.6324999332428
37
Scads
Decapterus
3.61500000953674
29
Greeneyes
Chlorophthalmidae
3.61374998092651
205
Skates and rays
Rajiformes
3.60999989509583
33
Redbait
Emmelichthys nitidus nitidus
3.59999990463257
28
Cuttlefishes
Sepiidae
3.59999990463257
42
Red pandora
Pagellus bellottii
3.59999990463257
49
False scad
Caranx rhonchus
3.58999991416931
81
Seabreams
Chrysoblephus
3.57999992370605
68
Octopuses
Octopoda
3.57999992370605
75
Blue antimora
Antimora rostrata
3.57500004768372
25
Picarels
Spicara
3.57450008392334
25
Flyingfishes
Exocoetidae
3.57180309295654
50
Flatfishes
Pleuronectiformes
3.54749989509583
100
Seabreams (Pagrus spp)
Pagrus
3.53143930435181
56
Perch-likes
Perciformes
3.51999998092651
29
Angola dentex
Dentex angolensis
3.51166701316834
35
Threadfin breams and Whiptail breams
Nemipteridae
3.5
102
Crevalle jack
Caranx hippos
3.5
56
Pelagic armorhead
Pseudopentaceros richardsoni
3.48000001907349
62
West coast sole
Austroglossus microlepis
3.47857093811035
62
Sea catfishes
Ariidae
3.47000002861023
23
Armored searobins or armored gurnards
Peristediidae
3.47000002861023
45
White baggar
Galeichthys feliceps
3.47000002861023
16
Longspine snipefish
Macroramphosus scolopax
3.47000002861023
56
Cape horse mackerel
Trachurus capensis
3.45000004768372
61
Cape elephantfish
Callorhinchus capensis
3.40000009536743
20
Whiteheads round herring
Etrumeus whiteheadi
3.38000011444092
45
Striped seabream
Lithognathus mormyrus
3.36999988555908
52
Canary drum
Umbrina canariensis
3.35863590240479
80
Grunts
Haemulidae
3.33999991416931
60
Black seabream
Spondyliosoma cantharus
3.3199999332428
60
Bulls-eye
Epigonus telescopus
3.30999994277954
4
Deepwater rose shrimp
Parapenaeus longirostris
3.30864906311035
164
Porgies
Sparidae
3.29999995231628
33
Cunene horse mackerel
Trachurus trecae
3.28999996185303
30
Tonguefishes
Cynoglossidae
3.25250005722046
53
Triggerfishes
Balistidae
3.25142908096313
21
Anchovies
Engraulidae
3.24000000953674
25
Herrings
Clupeiformes
3.24000000953674
55
West African goatfish
Pseudupeneus prayensis
3.21000003814697
53
Atlantic bumper
Chloroscombrus chrysurus
3.21000003814697
25
Round sardinella
Sardinella aurita
3.20333337783813
100
Steenbras
Lithognathus
3.17000007629395
7
Hectors lanternfish
Lampanyctodes hectoris
3.1589469909668
28
Herrings and shads and sardines and menhadens
Clupeidae
3.10500001907349
15
Gobies
Gobiidae
3.08999991416931
52
Chub mackerel
Scomber japonicus
3.04999995231628
74
Carpenter seabream
Argyrozona argyrozona
3.02999997138977
40
Longfin bonefish
Pterothrissus belloci
3.02999997138977
25
Bigeye grunt
Brachydeuterus auritus
3
25
Crustaceans
Crustacea
3
30
Bogue
Boops boops
2.97199988365173
49
Seabreams and porgies
Diplodus
2.96000003814697
19
Cape anchovy
Engraulis capensis
2.92000007629395
164
White steenbras
Lithognathus lithognathus
2.86999988555908
53
White stumpnose
Rhabdosargus globiceps
2.76699995994568
21
Sardinella
Sardinella
2.70000004768372
50
Spiny lobsters
Palinurus
2.70000004768372
34
Penaeus shrimps
Penaeus
2.70000004768372
13
Caramote prawn
Melicertus kerathurus
2.65000009536743
13
Natantian decapods
Shrimps and prawns
2.59999990463257
44
Lobsters and spiny-rock lobsters
Homaridae and Palinuridae
2.59999990463257
30
Marine crabs
Brachyura
2.59999990463257
18
Deepsea crabs
Geryon
2.59999990463257
40
Tropical spiny lobsters
Panulirus
2.59999990463257
46
Cape rock lobster
Jasus lalandii
2.59999990463257
10
Southern spiny lobster
Palinurus gilchristi
2.52500009536743
120
Mullets
Mugilidae
2.4300000667572
30
South American pilchard
Sardinops sagax
2.20000004768372
3
Euphausia
Euphausia
2.00999999046326
42
Salema
Sarpa salpa
2
25
Cupped oysters
Crassostrea
2
4
Donax clams
Donax
FiB index inputs
Reference year:
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
Transfer efficiency:
Method
Feedback