Effects of fishing and environmental parameters on the commercial bony fish assemblage in the southern Caspian Sea

Hasan Fazli; Farhad Kaymaram; Gholam Reza Daryanabard

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Effects of fishing and environmental parameters on the commercial bony fish assemblage in the southern Caspian Sea

Hasan Fazli

Farhad Kaymaram

oraz

Gholam Reza Daryanabard

| 31 mar 2022

Oceanological and Hydrobiological Studies

Tom 51 (2022): Zeszyt 1 (March 2022)

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Article Category: Original research paper

Data publikacji: 31 mar 2022

Zakres stron: 90 - 99

Otrzymano: 03 maj 2021

Przyjęty: 16 sie 2021

DOI: https://doi.org/10.26881/oahs.2022.1.08

Słowa kluczowe
commercial fish species, catch assemblage, temporal patterns, community structure, environmental parameters, Caspian Sea

© 2022 Hasan Fazli et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Map of the southern Caspian Sea (Iranian waters), the red-filled circles show the beach seine locations (Daryanabard et al. 2016).

Monthly mean (± SD) sea surface temperature variation in the southern Caspian Sea from 1996 to 2017.

MDS-ordination based on Bray–Curtis similarity, trajectory, and clustering (groups: a, b, c, and d) of the commercial bony fish assemblage in the Caspian Sea in 1996–2017, based on A) NPUE, and B) CPUE.

dbRDA plot of Bray-Curtis similarity between fish abundance similarity and environmental variables. The first two axes of dnRDA ordination explained 86.3% of the variation and 69.3% of the total variability in the species composition.

ABC curves for the bony fish assemblage in the southern Caspian Sea for the period from 1996 to 2017.

Trend in sea level, CPUE, sea surface temperature, W statistic, and Shannon diversity index for commercial bony fish in the Caspian Sea for the period from 1996 to 2017. Linear relationships were fitted to the SST and Shannon diversity index, and polynomial relationships were fitted to the sea level, CPUE, and W statistic to indicate the trend.

Environmental parameters in the Caspian Sea from 1996 to 2017.

Variable	Mean	SD	Minimum	Maximum
¹Precipitation, cm	125.8	20.27	85.3	153.9
¹Evaporation, cm	42.9	3.38	34.9	48.8
²SST_Mar, °C	11.4	0.77	10.2	12.6
²SST_Apr, °C	14.2	1.19	12.1	17.6
²SST_Oct, °C	22.7	0.79	21.6	24.2
²SST_Aug, °C	28.2	0.99	25.3	29.7
²SST, °C	19.2	0.42	18.3	20.2
³SSL, m	−26.4	0.34	−27.1	−26.1
³Volga discharge, km³	233.3	33.96	176.2	283.5
³Iran's rivers discharge, km³	3.79	1.58	1.98	7.50
²GTA	1.14	0.82	−0.88	2.42
⁴EAWR	−0.20	0.94	−2.12	2.11
⁴NAO	−0.13	0.38	−1.29	0.40

Relationship between environmental variables and diversity index, most abundant fish species (species with a percentage value higher than 1%) in the Caspian Sea.

	Variables	AIC	RSS	R²
Community	Year, PR, SST_Apr, SSL, SST, GTA, IRD, VD	83.0	422.7	0.803
Shannon diversity	Year, SSL, IRD	−86.3	0.302	0.867
Rutilus kutum	Year, PR, SST_Apr, SSL, SST, VD	−64.0	0.634	0.666
Cyprinus carpio	Year, PR, SSL, SST, SST_Aug, IRD, VD	−30.9	2.615	0.770
Rutilus rutilus	Year, PR, SST_Mar, SST_Apr, SST_Oct, SSL, SST, SST_Aug, EAWR, VD, NAO	−95.1	0.098	0.975
Chelon aurata	Year, SST_Oct, EV, SSL, SST, GTA, EAWR, VD, NAO	−66.8	0.388	0.832
Chelon saliens	Year, PR, SST_Oct, SSL, SST, GTA, EAWR, VD, NAO	−57.9	0.638	0.912

Results of the DistLM model, containing the Sum of Square (SS), Pseudo-F statistic, p-value, and proportional total variance.

Variable	SS	Pseudo-F	P-value	Proportion %
Year	1007.0	17.70	0.001	46.94
SSL	730.1	10.32	0.001	34.04
VD	321.5	3.53	0.013	14.99
IRD	281.2	3.02	0.032	13.11
EAWR	273.5	2.92	0.040	12.75
EV	192.0	1.97	0.111	8.95
SST_Mar	169.8	1.72	0.155	7.91
SST	146.0	1.46	0.208	6.81
SST_Aug	96.2	0.94	0.433	4.48
NAO	96.1	0.94	0.430	4.48
PR	86.8	0.84	0.486	4.04
SST_Apr	85.4	0.83	0.491	3.98
SST_Oct	67.9	0.65	0.602	3.16
GTA	58.1	0.56	0.688	2.71

Mean annual catch number per unit effort (NPUE) and catch per unit effort (kg/beach seine, CPUE, ± SE) of commercial bony fish in the Caspian Sea in 1996–2017.

Family	Species	NPUE (number)			CPUE (kg/beach seine)
Family	Species	Mean	SE	%	Mean	SE	%
Cyprinidae	Rutilus kutum	168.20	12.97	47.14	118.32	9.37	62.65
	Cyprinus carpio	16.01	7.12	4.49	9.38	3.35	4.97
	Rutilus rutilus	4.45	1.21	1.25	0.70	0.20	0.37
	Vimba vimba	3.22	0.81	0.90	0.44	0.11	0.23
	Alburnus chalcoides	1.05	0.26	0.29	0.21	0.05	0.11
	Leuciscus aspius	0.06	0.02	0.02	0.04	0.01	0.02
	Abramis brama	0.60	0.14	0.17	0.12	0.03	0.06
	Luciobarbus capito	0.14	0.03	0.04	0.10	0.02	0.06
Mugilidae	Chelon aurata	145.61	11.79	40.80	55.41	4.67	29.34
Mugilidae	Chelon saliens	16.09	4.41	4.51	3.57	0.98	1.89
Percidae	Sander lucioperca	1.34	0.34	0.38	0.50	0.13	0.27
Salmonidae	Salmo caspius	0.02	0.01	0.01	0.05	0.01	0.03
Siluridae	Esox lucius	0.05	0.02	0.01	0.02	0.01	0.01

eISSN:: 1897-3191
Język:: Angielski

Częstotliwość wydawania:: 4 razy w roku
Dziedziny czasopisma:: Chemistry, other, Geosciences, Life Sciences

Kanał RSS czasopisma

Effects of fishing and environmental parameters on the commercial bony fish assemblage in the southern Caspian Sea

Article Category: Original research paper

Data publikacji: 31 mar 2022

Zakres stron: 90 - 99

Otrzymano: 03 maj 2021

Przyjęty: 16 sie 2021

DOI: https://doi.org/10.26881/oahs.2022.1.08

Słowa kluczowe
commercial fish species, catch assemblage, temporal patterns, community structure, environmental parameters, Caspian Sea

© 2022 Hasan Fazli et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Environmental parameters in the Caspian Sea from 1996 to 2017.

Relationship between environmental variables and diversity index, most abundant fish species (species with a percentage value higher than 1%) in the Caspian Sea.

Results of the DistLM model, containing the Sum of Square (SS), Pseudo-F statistic, p-value, and proportional total variance.

Mean annual catch number per unit effort (NPUE) and catch per unit effort (kg/beach seine, CPUE, ± SE) of commercial bony fish in the Caspian Sea in 1996–2017.

Effects of fishing and environmental parameters on the commercial bony fish assemblage in the southern Caspian Sea

Article Category: Original research paper

Data publikacji: 31 mar 2022

Zakres stron: 90 - 99

Otrzymano: 03 maj 2021

Przyjęty: 16 sie 2021

DOI: https://doi.org/10.26881/oahs.2022.1.08

Słowa kluczowecommercial fish species, catch assemblage, temporal patterns, community structure, environmental parameters, Caspian Sea

© 2022 Hasan Fazli et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Environmental parameters in the Caspian Sea from 1996 to 2017.

Relationship between environmental variables and diversity index, most abundant fish species (species with a percentage value higher than 1%) in the Caspian Sea.

Results of the DistLM model, containing the Sum of Square (SS), Pseudo-F statistic, p-value, and proportional total variance.

Mean annual catch number per unit effort (NPUE) and catch per unit effort (kg/beach seine, CPUE, ± SE) of commercial bony fish in the Caspian Sea in 1996–2017.

Słowa kluczowe
commercial fish species, catch assemblage, temporal patterns, community structure, environmental parameters, Caspian Sea