Long-term changes in fecundity of the Kutum,<i>Rutilus frisii kutum</i>Kamensky, 1901, in the Caspian Sea (Osteichthyes: Cyprinidae)

Fazli, Hasan; Bandpei, Mohammad Ali Afraei; Pourgholam, Reza; Roohi, Aboulghasem

doi:10.1080/09397140.2013.795065

Cited by 6 publications

(2 citation statements)

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“…Kutum, Rutilus frisii kutum (Kamensky 1901), is an endemic species to the estuarine and coastal waters of the southern Caspian Sea and forms important commercial fisheries (Yousefian & Mosavi ; Shafiei Sabet, Imanpoor, Aminian Fatideh & Gorgin ; Fazli, Afraei Bandpei, Pourgholam & Roohi ). The species is a migratory anadromous fish, spawning in rivers in the early spring in March and April (Shikhshabekov ; Holčik ; Afraei Bandpei, Mashhor, Abdolmaleki, Najafpour, Bani, Pourgholam, Fazli, Nasrolahzadeh & Janbaz ), and return to the Caspian Sea after spawning for foraging and gonad development (Sharyati ; Valipour, Kanipour, KhadiviNia Moghaddam & Valinassab ).…”

Section: Introductionmentioning

confidence: 99%

The effects of salinity on reproductive performance and plasma levels of sex steroids in Caspian kutumRutilus frisii kutum

2015

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Sexually mature kutum, Rutilus frisii kutum, captured from its natural habits, the Caspian Sea and the Khoushkrood River, reared at 0.5 g L−1 and 8–13 g L−1 for approximately 1 year in experimental condition, for assessing the effect of salinity on reproduction. Plasma concentrations of sex steroid hormones (17β‐estradiol, testosterone and 17α‐hydroxyprogestrone) were measured in the three stages of gametogenesis. Female kutum held at <0.5 g L−1 or 8–13 g L−1 had no ovulated oocytes in their ovaries. In contrast, males held in captivity were spermiated, similar to their wild counterparts. The average sperm volume of males held at <0.5 g L−1 (2.36 ± 0.46 mL) was lower than males held at 8–13 g L−1 (3.65 ± 0.73 mL) at the end of the experimental period. The highest concentration of testosterone was observed in mid‐gametogenesis in wild fish that was significantly higher than the concentration seen in fish held in either <0.5 g L−1 or 8–13 g L−1. Female kutum showed suppressed steroid hormones in captivity, resulting in failure in the gonad development. However, male kutum adapt well to captivity and showed synchrony in steroid hormone variations with the wild fish, resulting in the testicular development. Results of this study also indicate that salinity plays a minor, but vital, role in reproduction of kutum, a factor that needs to be considered for keeping broodstock of brackish water fish species like kutum.

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Section: Introductionmentioning

confidence: 99%

The effects of salinity on reproductive performance and plasma levels of sex steroids in Caspian kutumRutilus frisii kutum

2015

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“…Kutum R. frisii (Nordmann 1840) is an anadromous species that is a major contributor to commercial fisheries in the southern part of the Caspian Sea (Fazli et al ., 2013). Adult R. frisii are winter–spring spawners and migrate annually to spawn in Azerbaijan and Iranian rivers from early February to the end of April (Afraei Bandpei et al ., 2010).…”

Section: Introductionmentioning

confidence: 99%

Retracing migration pattern in reproductive and non‐reproductive female kutum Rutilus frisii, in south Caspian Sea, using otolith microchemistry

Bani

Abdollahi

Karimi

et al. 2020

Journal of Fish Biology

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Because trace elements of otoliths are considered a natural marker capable of recognizing the chemical composition of ambient water and fish migration history, these elements could be potentially used to analyse the movement of reproductive (R) and non-reproductive (NR) mature-sized fish. Supposedly, it is not essential for NR individuals to migrate to rivers for spawning because they do not have developed gonads. To investigate the potential differences in migration history between female R and NR kutum, Rutilus frisii, in the southwest waters of the Caspian Sea, the ratios of Sr, Ba, Mg, Na, K and P to Ca in otoliths (from the core to the edge) were examined using laser ablation-inductively coupled plasma-mass spectrometry. In NR fish, a significant increase in Sr:Ca ratio in the otoliths' growth rings, likely due to greater seawater residency, and an increase in Ba:Ca ratio in the last two rings were observed. Increased Ba:Ca ratio could be due to the movement of NR mature-sized fish to the coastal zones for foraging. Seasonal physiological factors such as gonad maturation and spawning activity are more likely to be involved in differences in the other elemental ratios (Mg, Na, K and P). These results suggest that microchemical analyses of growth rings of otolith can be used as a valuable tool for better understanding the movement pattern of different types of adult fish, which could be completed with data from other methods like tagging.

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Suitability indices and habitat suitability index model of Caspian kutum (Rutilus frisii kutum) in the southern Caspian Sea

et al. 2013

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Long-term changes in fecundity of the Kutum,Rutilus frisii kutumKamensky, 1901, in the Caspian Sea (Osteichthyes: Cyprinidae)

Cited by 6 publications

References 10 publications

The effects of salinity on reproductive performance and plasma levels of sex steroids in Caspian kutumRutilus frisii kutum

The effects of salinity on reproductive performance and plasma levels of sex steroids in Caspian kutumRutilus frisii kutum

Retracing migration pattern in reproductive and non‐reproductive female kutum Rutilus frisii, in south Caspian Sea, using otolith microchemistry

Suitability indices and habitat suitability index model of Caspian kutum (Rutilus frisii kutum) in the southern Caspian Sea

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