Fine-scale population genetic structure of Endangered Caspian Sea trout, Salmo caspius: implications for conservation

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

“…After receiving the Khoshkehrud, Gelsardab, Siahpalas, Elarm, Absefid, Emam Bahtak, and Dalichay streams, it drains into Haraz River. Lar River, with a length of 55 km and an average slope of 3%, flows from northwest to southeast before draining to Haraz River which flows toward the Caspian Sea in the north (IRGOAF, 2005; 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. One population of Caspian Sea trout exists in tributaries of the Haraz River (Lar River) in Lar National Park, a protected area located west of the Damavand Summit in Iran (Tabatabaei, Abdoli, Hashemzadeh Segherloo, et al., 2020). According to previous reports, in reaches of Haraz River downstream of the Lar River, there exist 20 fish species belonging to the families Cyprinidae (11 species), Salmonidae (two species), and families Gobiidae, Gasterosteidae, Petromyzontidae, Mugilidae, Cobitidae, Poeciliidae, and Balitoridae (one species each) (Banagar et al., 2008).…”

“…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.…”

“…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.…”

Effects of anaesthesia with 1,8‐cineole on haematological and plasma stress responses in Caspian trout, Salmo caspius , subadults

“…Caspian trout, Salmo caspius , is a popular species in Iran, considered a good candidate for aquaculture industry (Kenari et al, 2013). Moreover, the natural population of this species has been declined, and a stock rehabilitation programme has been conducted to restore its populations (Tabatabaei et al, 2020). There are limited studies on the use of anaesthetics in this species (Bahrekazemi & Yousefi, 2017), which indicates the need for more data on this topic, particularly about the use of new anaesthetics.…”