The Alterations in the Hematological Parameters of Endangered Caspian Brown Trout, Salmo trutta caspius, Exposed to Waterborne Mercuric Chloride

2012 ◽  
Vol 6 (4) ◽  
pp. 154-163 ◽  
Author(s):  
Seyed Ehsan Mousavi ◽  
Mehdi Yousefian
Keyword(s):  
Brown Trout ◽  
Mercuric Chloride ◽  
Salmo Trutta ◽  
Hematological Parameters ◽  
Caspian Brown Trout ◽  
Brown Trout Salmo Trutta ◽  
Salmo Trutta Caspius

Identification of follicular vitellogenesis stage by monitoring of plasma calcium and estradiol-17β concentrations in the cultured Caspian brown trout, Salmo trutta caspius Kessler, 1877

Biologia ◽  
2012 ◽  
Vol 67 (4) ◽  
Author(s):  
Hamid Jamalzadeh ◽  
Saeed Hajirezaee ◽  
Samane Nazeri ◽  
Hossein Khara ◽  
Elham Mirrasuli
Keyword(s):  
Brown Trout ◽  
Salmo Trutta ◽  
Positive Relationship ◽  
Plasma Calcium ◽  
Caspian Brown Trout ◽  
Clear Peak ◽  
Brown Trout Salmo Trutta ◽  
Estradiol 17Β ◽  
Simple Indicator ◽  
Salmo Trutta Caspius

AbstractTo identify a simple indicator for detection of follicular vitellogenesis stage of cultured Caspian brown trout, the changes of plasma calcium and estradiol-17β along with ovarian histology were investigated over a reproductive cycle. For this purpose, the blood and gonad samples were taken monthly over a six months period. According to results, the concentrations of plasma calcium increased significantly during October and November but then declined steadily until the end of experiment. Estradiol-17β concentrations were low throughout the experiment, a clear peak was observed in October. Histological observations showed that all examined females were in vitellogenesis when the peak of plasma calcium and estradiol-17β were observed. Also, significant positive relationship was found between plasma calcium and estradiol. The good fitness of plasma calcium and estradiol-17β peak with histological observations suggests that plasma calcium could be a good and simple indicator for detection of follicular vitellogenesis stage in the cultured Caspian brown trout.

scholarly journals Effect of feeding Artemia Urmiana cysts on performance and survival of Caspian brown trout (Salmo trutta caspius) fish at the larva stage

2019 ◽  
Vol 8 (1) ◽  
Author(s):  
Reza Ebrahimi Khezr Abad ◽  
Masoud Farrokhrooz ◽  
Ali Nekuie Frad
Keyword(s):  
Brown Trout ◽  
Feed Intake ◽  
Salmo Trutta ◽  
Specific Growth ◽  
Caspian Brown Trout ◽  
Brown Trout Salmo Trutta ◽  
Different Levels ◽  
Effect Of Feeding ◽  
Salmo Trutta Caspius ◽  
Artemia Urmiana

This study was conducted to evaluate the effect of feeding different levels of Artemia Urmiana cysts on performance and survival of Caspian brown trout fish. The treatments included different levels (25, 50, 75 and 100 %) of Artemia Urmiana cysts to Caspian brown trout fish with an average weight of 120 ± 25 g in active phase of larva stage until the weight of one gram. Feed intake (FI), weight gain (WG), body weight (BW), feed conversion ratio (FCR), specific growth rate (SGR) of the treatments were determine and the survival percentage index was calculated based on the number of remaining larvae in the sites on the total number of larvae. The result of study showed that the higher feed intake was for 25 and the lower feed intake was for 50% of Artemia urmiana cysts treatments. Also the best specific growth rate and feed conversation ratio was related to the 25 % of Artemia Urmiana cysts groups (P≤0.05). Additionally the best survival index was for fish that fed by 75% and the worst survival index was for fish that fed by 100% of Artemia urmiana cysts. In conclusion we could demonstrated that feeding Artemia Urmiana cysts may have some beneficial effects on the performance and survival of Caspian brown trout (Salmo trutta caspius) fish at the larva stage.

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