A paradoxical bias in knowledge about Norwegian freshwater fishes: research efforts during 1980 - 2020 Author Vøllestad, Leif Asbjørn Centre for Ecological and Evolutionary Synthesis, Department of Biosciences, University of Oslo, PO. Box 1066 Blindern, N- 0316 Oslo, Norway text Fauna norvegica 2023 2023-02-28 42 6 30 https://doi.org/10.5324/fn.v42i0.4965 journal article 311911 10.5324/fn.v42i0.4965 c2077008-c379-4659-ad0a-fdcf6e7ec500 1891-5396 16906986

Table 1. Summary of all known freshwater fishes in Norway, organized by family. Number of articles retrieved by a Web of Science search for the time period 1980-2020 is given (see main text for description of search algorithms for the global and the Norwegian search). The state indicates if the species is native (N) or non-native (I). Potential listing on the various versions of the Norwegian Red List for species is also given (NT Near threatened; VU vulnerable; DD data deficient; EN endangered), together with the classification of the nationally or regionally non-native fishes and their potential ecological impact (LR low risk; HR high risk; VHR very high risk; no risk).

		No. articles			Norwegian Red List				Non-native
Species number and name		Global	Norway	State	2021	2015	2010	2006	National	Regional
Petromyzontidae
1 Petromyzon marinus	sea lamprey	2866	0	N	NT	NT
2 Lampetra fluviatilis	river lamprey	1117	1	N
3 Lampetra planeri	brook lamprey	391	1	N
4 Lethenteron camtschaticum	arctic lamprey	102	0	N	VU	NT	DD	DD
Cyprinidae
5 Carassius carassius	crucian carp	1650	16	N						LR
6 Carassius auratus	goldfish	10105	3	I					HR
7 Cyprinus carpio	carp	18770	7	I					HR
Leuciscidae
8 Rutilus rutilus	roach	4633	43	N						HR
9 Leuciscus leuciscus	common dace	508	1	N
10 Leuciscus cephalus	chub	1229	2	N
11 Leuciscus idus	ide	500	3	N
12 Phoxinus phoxinus	Eurasian minnow	1085	28	N						VHR
13 Scardinius erythrophthalmus	rudd	781	4	N						VHR
14 Aspius aspius	asp	261	2	N				VU
15 Alburnus alburnus	bleak	874	7	N
16 Blicca bjoerkna	silver bream	474	4	N				NT
17 Abramis brama	bream	2544	11	N
18 Leucaspius delineatus	sunbleak	234	2	I					LR
Gobionidae
19 Gobio gobio	gudgeon	690	2	I					LR
Tincidae
20 Tinca tinca	tench	1496	3	I					HR
Ictaluridae
21 Ameiurus nebulosus	brown bullhead	486	2	I					LR
Esocidae
22 Esox lucius	pike	4174	30	N						VHR
Osmeridae
23 Osmerus eperlanus	smelt	571	22	N
Salmonidae
24 Salmo salar	Atlantic salmon	21717	610	N	NT
25 Salmo trutta	brown trout	10133	528	N
26 Oncorhynchus mykiss	rainbow trout	35910	15	I					HR
26 Oncorhynchus gorbuscha	pink salmon	2001	8	I					HR
27 Oncorhynchus keta	chum salmon	2890	1	I					No Risk
28 Salvelinus alpinus	Arctic char	3761	318	N
29 Salvelinus fontinalis	brook trout/brook char	4231	8	I					LR
30 Salvelinus namaycush	lake trout	2317	2	I					LR
Species number and name		Global	Norway	State	2021	2015	2010	2006	National	Regional
31 Coregonus lavaretus	whitefish	1571	95	N
32 Coregonus albula	vendace	877	49	N						LR
33 Thymallus thymallus	grayling	921	37	N
Lotidae
34 Lota lota	burbot	1112	17	N
Gastrosteidae
35 Gasterosteus aculeatus	three-spined stickleback	5144	49	N
36 Pungitius pungitius	nine-spined stickleback	610	5	N
Cottidae
37 Cottus gobio	bullhead	673	2	N				NT
38 Cottus poecilopus	alpine bullhead	119	16	N
39 Myoxocephalus quadricornis	fourhorn sculpin	90	0	N			DD	VU
Percidae
41 Perca fluviatilis	Eurasian perch	5066	55	N
42 Sander lucioperca	pikeperch	1093	4	N				EN
43 Gymnocephalus cernuus	ruffe	809	5	N
Centrarchidae
44 Lepomis gibbosus	pumpkinseed	1219	2	I					LR