Impact of human activities on changes of ichthyofauna in Dongjin River of Korea in the past 30 years

Figures & data

Figure 1. Study stations of the Dongjin River drainage system, Jeollabuk-do, Korea, 2014. The thick black lines (A and B) represent two tunnels connecting the waters of the Dongjin River and Seomjin River (Lake Okjeong).

Table 1. Hydrological and physicochemical environments at the study stations in the Dongjin River drainage system, Jeollabuk-do, Korea, from spring to fall, 2014.

St.	River width (m)	Water width (m)	Water depth (m)	Altitude (m)	Stream order	Bottom structure (%)						Water temperature (°C)	Conductivity (μs/cm)	DO (mg/ℓ)	pH
						M	S	G	P	C	B
1	30–40	10–20	0.5–1.0	95	2	5		15	20	50	10	14.8 ± 2.73	131 ± 20	9.8 ± 0.38	6.4–7.1
2	60–80	10–30	0.3–1.0	56	3		30	40	20	10		17.0 ± 3.08	140 ± 18	10.6 ± 0.15	6.4–7.1
3	50–70	30–40	0.3–1.0	42	3		10	20	50	20		17.6 ± 2.50	133 ± 14	10.6 ± 1.03	6.4–7.1
4	100–120	20–50	0.5–1.5	36	3		20	10	30	30	10	18.4 ± 2.65	133 ± 12	9.5 ± 1.01	6.5–7.1
5	110–120	40–70	0.3–1.2	23	3		20	40	20	10	10	18.4 ± 3.09	140 ± 15	10.4 ± 2.27	6.5–7.1
6	130–150	10–30	0.3–1.2	18	4		20	70	10			18.4 ± 2.73	171 ± 54	9.4 ± 1.45	6.4–7.1
7	150–200	50–100	0.3–1.5	10	4	40	30			10	20	18.1 ± 2.79	125 ± 22	8.9 ± 0.98	7.0–7.1
8	80–100	5–10	0.3–1.0	77	3			10	10	60	20	18.3 ± 6.67	115 ± 22	10.7 ± 0.68	6.8–7.1
9	120–150	30–70	0.3–1.2	27	4	10	20	30	10	20	10	20.0 ± 6.33	281 ± 43	9.1 ± 1.69	6.4–7.0
10	90–100	20–30	0.5–1.0	10	4	50	40	10				22.0 ± 4.63	594 ± 238	8.0 ± 0.50	6.6–7.1
11	150–200	80–100	1.5–3.0	6	4	70	10				20	20.6 ± 6.97	225 ± 70	8.2 ± 0.51	6.5–7.1
12	30–40	3–10	0.3–1.0	10	3	60	40					20.7 ± 5.03	342 ± 79	10.5 ± 0.84	6.5–7.0
13	150–200	130–150	1.5–3.0	6	4	90					10	21.8 ± 5.79	320 ± 35	8.6 ± 0.80	6.7–7.1
14	250–300	200–250	0.5–2.0	1	5	80	10				10	21.0 ± 0.14	360 ± 99	7.5 ± 0.68	6.7–7.1
15	40–50	20–30	1.0–1.2	8	3	90	10					20.7 ± 4.74	319 ± 51	8.4 ± 0.90	6.7–7.1
16	90–120	5–30	0.3–1.2	9	3	60	20			10	10	20.4 ± 4.75	335 ± 51	7.5 ± 0.65	6.5–7.0
17	150–200	80–100	1.5–3.0	5	4	70	20				10	21.8 ± 4.94	277 ± 65	9.1 ± 0.46	6.8–7.3

Note: M: Mud (<0.1 mm); S: Sand (0.1–2 mm); G: Gravel (2–16 mm); P: Pebble (16–64 mm); C: Cobble (64–256 mm); B: Boulder (256 < mm) – modified Cummins (1962).

Table 2. List of fish species and the number of fish collected in the Dongjin River drainage system, Jeollabuk-do, Korea, from spring to fall, 2014.

Scientific name	Stations																	Total	RA^a (%)	Remarks
	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17
Order Petromyzontiformes
Family Petromyzonidae
Lethenteron reissneri				2	8													10	0.20	En-II, L
Order Anguilliformes
Family Anguillidae
Anguilla japonica														1				1	0.02	C
Order Cypriniformes
Family Cyprinidae
Cyprinus carpio								2	1		1	1		1				6	0.12
Carassius auratus		1	3		6	8	12	22	8	11	4	14	2	6	1	15	4	117	2.39
Carassius cuvieri									11		2	2	5	25	53	16	13	127	2.59	Ex
Rhodeus ocellatus									2									2	0.04
Rhodeus uyekii		5							4			10						19	0.39	E
Rhodeus notatus												9						9	0.18
Acheilognathus lanceolatus						6	1			3		7				7		24	0.49	E
Acheilognathus koreensis				9														9	0.18
Acheilognathus rhombeus															2		8	10	0.20
Acheilognathus chankaensis												12	3	8		4	2	29	0.59
Pseudorasbora parva					4				11		19	35	30	17	13	21		150	3.06
Pungtungia herzi					3													3	0.06
Sarcocheilichthys nigripinnis morii														2				2	0.04	E
Gnathopogon strigatus																4		4	0.08
Squalidus gracilis majimae		35		12					40						7	3		97	1.98	E
Squalidus chankaensis tsuchigae							7			17		2		75			2	103	2.10	E
Hemibarbus labeo										2	7			11				20	0.41
Hemibarbus longirostris		13	4	4		12	15		11									59	1.20
Abbottina springeri		22	24	35			52	2	255	1				1			1	393	8.02	E
Abbottina rivularis																	2	2	0.04
Pseudogobio esocinus		12	32	15	25	85	58		37	2	22	26		4		39	6	363	7.40
Microphysogobio yaluensis		25			4	12	140		58	1	25	4		1				270	5.51	E
Microphysogobio jeoni														2				2	0.04	E
Aphyocypris chinensis																2		2	0.04
Rhynchocypris oxycephalus	18	140	56		5	2		6										227	4.63
Zacco koreanus	85	105	100	130	68	10		21										519	10.59	E
Zacco platypus		131	66	60	64	43	27	20	265	140	45	16			17	19		913	18.62
Opsariichthys uncirostris amurensis										10				5				15	0.31
Hemiculter eigenmanni	2										2	80	17	45	13		16	175	3.57	E
Erythroculter erythropterus														50				50	1.02
Family Balitoridae
Lefua costata								3										3	0.06
Family Cobitidae
Misgurnus anguillicaudatus	4	13	5	5	2	1			1			6			3	3		43	0.88
Misgurnus mizolepis		7	1															8	0.16
Iksookimia koreensis	1	45	4	7			1	5	6									69	1.41	E
Iksookimia longicorpa			5	7	4													16	0.33	E
Cobitis lutheri					1	3			60			26			52	37		179	3.65
Cobitis tetralineata		8		9	2													19	0.39	E
Cobitis lutheri-tetralineata hybrid		130	53	80	47	18	5											333	6.79
Order Siluriformes
Family Siluridae
Silurus microdorsalis		1																1	0.02	E
Silurus asotus												4						4	0.08
Family Bagridae
Pseudobagrus fulvidraco		1							5									6	0.12
Family Amblycipitidae
Liobagrus somjinensis		6	2	5	2													15	0.31	E
Order Mugiliformes
Family Mugilidae
Chelon haematocheilus														13				13	0.27
Order Beloniformes
Family Adrianichthyidae
Oryzias sinensis									5			11						16	0.33
Order Perciformes
Family Centropomidae
Coreoperca herzi									3									3	0.06	E
Family Centrachidae
Lepomis macrochirus								8				18	1					27	0.55	Ex
Micropterus salmoides								3	2	7	5	1	2	5			56	81	1.65	Ex
Family Odontobutidae
Odontobutis platycephala		4	15	3	3	2		2	4									33	0.67	E
Odontobutis interrupta												5						5	0.10	E
Family Gobiidae
Rhinogobius giurinus												5				8		13	0.27
Rhinogobius brunneus	30	89	13	30		9	5	4	17				5		3	6	3	214	4.36	L
Tridentiger brevispinis	11	30	6	20	3													70	1.43
Number of species	7	21	16	17	17	13	11	12	21	10	10	21	8	18	10	14	11	53
Number of individuals	151	823	389	433	251	211	323	98	806	194	132	294	65	272	164	184	113	4903

Note: En-II: endangered species rank II; E: endemic species; A: amphidromous species; C: catadromous species; L: land-locked species; Ex: exotic species.

^aRA: relative abundance (%).

Figure 2. Dendrogram based on cluster analysis of similarity index of fish community in the sampling stations of the Dongjin River drainage system, Jeollabuk-do, Korea, 2014.

Figure 3. River health assessment for multivariate matrix index of biological integrity (IBI) in Dongjin River drainage system, Jeollabuk-do, Korea, 2014.

Figure 4. Relative abundance of fish species of the Dongjin River drainage system, Jeollabuk-do, Korea, from 1984 to 2014. *a: absence.

Cummins KW. 1962. An evaluation of some techniques for the collection and analysis of benthic samples with special emphasis on lotic waters. Am Midl Nat. 67:477–504. doi: 10.2307/2422722

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