Status of the fish fauna in the South Caspian Basin of Iran

Kiabi, Bahram H.; Abdoli, Asghar; Naderi, Mehdi

doi:10.1080/09397140.1999.10637782

Cited by 169 publications

(122 citation statements)

References 2 publications

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“…The Caspian brown trout, Salmo trutta caspius, is a critically endangered anadromous species that has been considered for a biological conservation program in the southern part of the Caspian Sea (Kiabi et al, 1999). In recent years, because of a dramatic decline in broodstock capture and subsequently of insufficient availability of sexual gametes (sperm and ova), severe restrictions were imposed on the propagation of this species by means of artificial fertilization.…”

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confidence: 99%

Evaluation of semen quality of endangered Caspian brown trout (Salmo trutta caspius) in different times of spermiation during the spawning season

Hajirezaee¹,

Amiri²,

Mirvaghefi³

et al. 2010

CZECH J ANIM SCI

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Sperm motility and sperm production as well as organic and inorganic components present in the seminal plasma were measured at different time periods of spermiation during the spawning season in order to evaluate the semen quality in Caspian brown trout, Salmo trutta caspius. For such evaluation, males were divided into four groups based on the date of spermiation: group A (pre-mature broodstocks), group B and C (mid-mature broodstocks), group D (late-mature broodstocks). Our results showed that the Caspian brown trout produces semen of variable quality depending on the date in the period of spermiation. In this regard, the percentage of motile spermatozoa, duration of motility, sperm density, osmolality and also the concentrations of Na + , Cl -, K + , Ca 2+ , Mg 2+ and total protein content were significantly higher in mid-mature broodstocks (which matured in the middle of spawning season, i.e. groups B and C) compared to pre-mature (group A) and late-mature (group D) samples. Statistically significant positive correlations were also found between these semen parameters: sperm production vs Na

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confidence: 99%

Evaluation of semen quality of endangered Caspian brown trout (Salmo trutta caspius) in different times of spermiation during the spawning season

Hajirezaee¹,

Amiri²,

Mirvaghefi³

et al. 2010

CZECH J ANIM SCI

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“…Its populations have been recorded from South Caspian Sea (Berg, 1949;Bianco and Banarescu, 1982;Kiabi et al, 1999;Abdoli, 2000), (Figure 1). In addition, Barbus lacerta has been recorded from Tigris basin and its type locality is Kueik River, Aleppo.…”

Section: Introductionmentioning

confidence: 99%

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Motamedi¹,

Madjdzadeh²,

Teimori³

et al. 2014

Turk. J. Fish. Aquat. Sci.

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Geographically isolated populations of Barbus present remarkable variation with regard to morphometric and meristic characters within Iranian drainage systems; while they are relatively similar in external morphology such as coloration. Present study is the first report on geographical differentiation of Barbus populations in Iran from both morphological and molecular point of views. The morphometric and meristic characters as well as phylogenetic relationships (using sequence data of mtDNA cytochrome b gene) of twelve populations from three drainages (i.e. South Caspian Sea, Orumyieh and TigrisKaroun) were analyzed. The univariate analysis reveals significant morphological differentiation among the populations from the three drainages. The phylogenetic analyses indicate relatively high genetic differentiation among the populations from the mentioned drainages, which are consistent with the observed morphological variation, and correspond well with their biogeographic distribution. However, the result of Automatic Barcode Gap Discovery (ABGD) analysis shows intra-specific differentiation for the sequences from South Caspian Sea drainage, while support the distinction of the specimens from TigrisKaroun drainage as B. lacerta. Since the sequence data of Barbus cyri from Armenia is clustered with individuals from the South Caspian Sea and the morphological comparison, the specimens from that basin are considered as B. cyri and the Orumyieh basin as Barbus sp.

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“…The final maturation of fish spermatozoa comprises the releasing of spermatozoa from testis (spermiation) to sperm duct and the obtaining the ability to fertilise (reviewed by Miura & Miura 2003), which could be initiated naturally in wild or induced by hormonal treatment in fish hatchery. The Caspian brown trout, Salmo trutta caspius, is a critically endangered anadromous species of the Caspian Sea (Kiabi et al 1999). Due to this, numerous studies have been done in order to increase the efficiency of artificial reproduction specially spermatozoa in this species.…”

Section: Introductionmentioning

confidence: 99%

Steroid profile of male endangered Caspian brown trout,Salmo trutta caspiusKessler, 1877 after gonadotropin-releasing hormone analogue treatment

Heidari

Abbasi

Zamani³

et al. 2014

Journal of Applied Animal Research

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The sex steroid profile of Caspian brown trout was investigated after gonadotropin-releasing hormone analogue (GnRHa) injection throughout the spawning season, i.e. December and January. The values of testosterone (T), 11-Ketotestosterone (11-KT), progesterone (P), cortisol (C) and 17α, hydroxyprogesterone (OHP) were measured for GnRHa treated (the treatment group) and untreated groups (the control group) during the spawning season. In treated males, the values of 11-KT, OHP and C increased 14 days after GnRHa treatment and only showed a significant decrease at the end of the season. Also, the T and P levels showed increases 14 days after GnRHa treatment and then decreased continuously towards the end of the season. In untreated males, sex steroid peaks were observed 27 days after first stripping. In conclusion, our results showed that the GnRHa treatment of Caspian brown trout promotes the final maturation by clear effects on the sex steroid profile.

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Status of the fish fauna in the South Caspian Basin of Iran

Cited by 169 publications

References 2 publications

Evaluation of semen quality of endangered Caspian brown trout (Salmo trutta caspius) in different times of spermiation during the spawning season

Evaluation of semen quality of endangered Caspian brown trout (Salmo trutta caspius) in different times of spermiation during the spawning season

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Steroid profile of male endangered Caspian brown trout,Salmo trutta caspiusKessler, 1877 after gonadotropin-releasing hormone analogue treatment

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