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Showing 3 results for Cyprinidae
Sahar Biukani, Ali Safarpour, Bahram Falahatkar,
Volume 2, Issue 1 (6-2013)
Abstract
Fish fauna at three stations along the Gamasiab River, Kermanshah Province, were investigated for 9 months. Samples were caught using electroshocker and cast net of 1.5 cm mesh size and had their 20 morphometric and 10 meristic characteristics recorded. Twenty three species and subspecies in 14 genera and 5 families were identified, including: minnows (Cyprinidae), sisorid catfishes (Sisoridae), bagrid catfishes (Bagridae), river loaches (Balitoridae) and spiny eels (Mastacembelidae). The highest number of species (18, 78.3%) and genera (10, 71.4%) belonged to Cyprinidae, while 2 species (8.7%) in 1 genus (7.1%) belonged to Balitoridae; the other three families each contained 1 genus and 1 species (4.3%). The lowest species diversity (9 species) was observed in upstream station while the highest diversity (16 species) was in downstream station. Among the identified fish, only Pseudorasbora parva was recognized as exotic and the others were native.
Y. Keivany, S.s. Mortazavi , O. Farhadian ,
Volume 7, Issue 2 (6-2018)
Abstract
Aims: King Nase fish (Chondrostoma regium) is a benthopelagic species that lives in stagnant and current water with a temperature range of 3-21°C and in the middle and upper parts of the river. The aim of this study was to evaluate the reproductive characteristics of King Nase fish.
Materials and Methods: In this experimental study, 335 fish were randomly caught and transferred to the laboratory after anesthetization and fixation for biometric measurements and dissections. The data were analyzed by one-way analysis of variance (ANOVA), Duncan's multiple range test (MRT), and unpaired T-test and SPSS 19 software.
Findings: The fork length and weight changes in male and female fish in all age groups, except for 1 and 2 year in females, showed a significant difference. There was a significant correlation between fork length, weight, and age of fish with its fecundity (r2=0.6922; r2=0.6852; r2=0.7284). Age groups of the males and females were 1 to 5 and 1 to 6 years, respectively. The sex ratio of male to female was 1:1.3. The oocyte diameter significantly increased from April to June and decreased in July and August. Changes in oocyte diameter corresponded to gonadosomatic index. The highest gonadosomatic index in males and females was in April and June, respectively, and varied with other months (p<0.05). The mean of this index was significantly higher in females than in males. The hepatosomatic index showed a significant difference during the months of the year (p<0.05). The spawning season was from late March to June.
Conclusion: The spawning season of King Nase fish is from late March to June and has a group simultaneous spawning pattern.
Erfan Akbari Nargesi, Bahram Falahatkar, Daniel Zarski, Danial Gorouhi,
Volume 13, Issue 4 (11-2024)
Abstract
The present study aimed to investigate the effects of injecting different hormonal agents on sex steroids levels and biochemical parameters of the blood plasma in females Caspian roach (Rutilus caspicus). In order to perform the experiment, groups of five fish were injected intraperitoneally as follows: 1) two injections of Ovaprim (Ova), 2) two injections of Ovopel (Ovo), 3) a priming dose of Ovopel with a resolving dose of Ovaprim (Comb1), 4) a priming dose of Ovaprim with a resolving dose of Ovopel (Comb2), and 5) sterile 0.9% saline. According to the observations, the highest concentrations of progesterone and estradiol were measured in control group and concentrations of these hormones sharply declined after spawning in the experimental treatments (P < 0.05). Moreover, the lowest testosterone concentration was observed in the control group and after spawning, its concentration showed a significant increase in hormone-induced treatments (P < 0.05). The highest plasma glucose concentration was obtained in the control group, and the lowest concentration was observed in the Comb1 treatment (P < 0.05). No significant difference was observed between experimental treatments in the concentration of plasma biochemical parameters (P > 0.05). Overall, the present study showed that hormonal agents can significantly affect the levels of sex steroids in the blood plasma of Caspian roach breeders. These results showed the need to consider the proper induction strategies and welfare conditions of Caspian roach breeders in captivity.
