Mixed stock assessment of lake-run Caspian Sea trout Salmo caspius in the Lar National Park, Iran

Tabatabaei, Seyedeh Narjes; Abdoli, Asghar; Ahmadzadeh, Faraham; Primmer, Craig R.; Swatdipong, Akarapong; Segherloo, Iraj Hashemzadeh

doi:10.1016/j.fishres.2020.105644

Cited by 4 publications

(4 citation statements)

References 25 publications

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“…Among the noted fish species, Oncorhynchus mykiss , Carassius spp., Liza saliens , Gasterosteus aculeatus , and Gambusia holbrooki , are nonnative. Since the construction of the Lar Dam, Caspian Sea trout populations in Lar National Park have been limited to the national park (Tabatabaei, Abdoli, Ahmadzadeh, et al., 2020; Tabatabaei, Abdoli, Hashemzadeh Segherloo, et al., 2020). As water impounded in Lar Reservoir is used to supply drinking water, no aquaculture, industrial activity, or permanent settlements are permitted.…”

Section: Introductionmentioning

confidence: 99%

“…These threats are especially harsh for fish species that perform bidirectional migrations between marine and freshwater habitats. In Iran native Caspian Sea trout ( Salmo caspius ) populations found in the southern Caspian Sea and inland lake basins (Hashemzadeh Segherloo, Tabatabaei, Abdoli, et al., 2022) are put at risk by all of the above‐listed threats and many have already declined (Abdoli, 2000; Kiabi et al., 1999; Tabatabaei, Abdoli, Ahmadzadeh, et al., 2020; Tabatabaei, Abdoli, Hashemzadeh Segherloo, et al., 2020). This situation has led to the development and implementation of national management and conservation programs by Iranian fisheries and environmental organizations to protect the populations of the species that inhabit the south Caspian Sea basin.…”

Section: Introductionmentioning

confidence: 99%

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eDNA metabarcoding as a means to track distributions of different fish species in a protected area

Tabatabaei,

Hashemzadeh Segherloo,

Abdoli

et al. 2024

Environmental DNA

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In Lar National Park (Caspian Sea basin, Iran), the Caspian trout (Salmo caspius) population faces different threats, including introduced fish species. Due to the harsh environmental conditions and limited accessibility, monitoring of fish species via conventional approaches proves difficult. Hence, environmental DNA metabarcoding may prove an appropriate tool for monitoring fishes within the park. Environmental DNA samples from eight stream sites in the National Park were sequenced via metabarcoding of the 12S rRNA gene, and the species identified via eDNA metabarcoding were compared to the results of electrofishing performed at the same localities on the same day. No significant difference in the number of Caspian Sea trout DNA sequence reads was detected among the collection sites (p > 0.05). The highest number of reads was detected in Dalichay Stream, but the highest population density determined via electrofishing was in Siahpalas Stream. The discrepancy between the eDNA read count and trout population density, as well as the limited sampling scheme within this study, limit our ability to provide a robust conclusion about the application of environmental DNA metabarcoding for assessment of fish density in Lar National Park. Environmental DNA metabarcoding detected more species than electrofishing, but no significant differences in the composition of the local fish community were observed. Introduced fish species were all observed or detected in Siahpalas Stream, which is characterized by high water temperature, muddy substrate, and lower flow rate. A significant effect of flow rate and total dissolved solids on the presence of introduced fish species (p = 0.02) and of flow rate alone on relative abundance of introduced fish species (p = 0.03) was detected. To standardize the application of eDNA metabarcoding as a biodiversity assessment tool in Lar National Park, future studies should characterize the parameters that affect eDNA persistence and detectability in the system.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

eDNA metabarcoding as a means to track distributions of different fish species in a protected area

Tabatabaei,

Hashemzadeh Segherloo,

Abdoli

et al. 2024

Environmental DNA

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“…During the last decades, the capture rate of S. caspius throughout the southern basin of the Caspian Sea have had a considerable reduction. There are several factors for this observation among which the overfishing, poaching, drought, rivers' system manipulation, water pollution and dam constructions draw more attention [8,9]. It is presumed that the populations of S. caspius, the lake-run form of Salmo in the southern Caspian basin, have been more affected by the dam constructions and consequent losing nursery grounds, making it too difficult for natural breeding and recovery of the wild stocks [10].…”

Section: Introductionmentioning

confidence: 99%

“…caspius throughout the southern basin of the Caspian Sea have had a considerable reduction. There are several factors for this observation among which the overfishing, poaching, drought, rivers’ system manipulation, water pollution and dam constructions draw more attention [ 8 , 9 ]. It is presumed that the populations of S .…”

Section: Introductionmentioning

confidence: 99%

Genome-wide data suggest a revision in management of the Caspian Sea trout Salmo caspius

Najafikhah,

Zeinalabedini,

Arefnezhad

et al. 2023

PLoS ONE

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Salmo caspius Kessler, 1877 is one of the most commercially important species of Salmonidae in the southern basin of the Caspian Sea. The occurrence of its wild populations has undergone sever reduction during the last years. In spite of the yearly restocking activity, still no progress on the recovery of its wild population has been observed. Hence, the present study was done in order to assess the efficiency of the current restocking activity in the southern Caspian basin in term of genetic diversity. DNA extracts of 32 S. caspius from four different groups were screened using 62621 genome-wide single nucleotide polymorphisms (SNP). The overal genetic diversity and Fst values were 0.18 and 0.08, respectively. Considering the observed admixture pattern and the positive values for inbreeding coeficient it seems that S. caspius suffers from its small effective population size. In order to obtain the maximum performance, alonside with expanding the size of brood stocks, rehabilitation of the habitats and spawning rivers of this nationally endangered species is of great importance.

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Population genomics of the southern Caspian Sea Vobla Rutilus lacustris

et al. 2020

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Mixed stock assessment of lake-run Caspian Sea trout Salmo caspius in the Lar National Park, Iran

Cited by 4 publications

References 25 publications

eDNA metabarcoding as a means to track distributions of different fish species in a protected area

eDNA metabarcoding as a means to track distributions of different fish species in a protected area

Genome-wide data suggest a revision in management of the Caspian Sea trout Salmo caspius

Population genomics of the southern Caspian Sea Vobla Rutilus lacustris

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