Fisheries
Articles in Press, Accepted Manuscript, Available Online from 01 December 2013
Abstract
In this study acute toxicity (96h LC50) of EDTA has been carried out in laboratory conditions in 2011 fall for rainbow trout. The experiments were conucted for 96h with standard method (O.E.C.D). LC50 values of EDTA at 96 h were 2231 mgl-1, to the rainbow trout. Then, individuals with a body weight of ...
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In this study acute toxicity (96h LC50) of EDTA has been carried out in laboratory conditions in 2011 fall for rainbow trout. The experiments were conucted for 96h with standard method (O.E.C.D). LC50 values of EDTA at 96 h were 2231 mgl-1, to the rainbow trout. Then, individuals with a body weight of 51 ± 12 g and length 18.5 ± 2.1 cm were selected for six groups (five test group and control group). Onchorhychus mykiss were exposed to 800, 1100, 1400, 1700 and 2100 mgl-1 of EDTA. Fish were exposed for 96 h. The experiments periods were controlled water physicochemical factors such as: pH, total hardness, dissolved oxygen and temperature. For analysis of all data SPSS software program was used. Haematology results show that exposure to EDTA causes an increase in leucocyte count (WBC), notrophil, eosinophil, monocyte and a decrease in haemoglobin (Hb), haematocrit (HCT) and lymphocyte (P0.05). The results showed that exposure to low concentrations of EDTA causes changes in some haematological parameters of rainbow trout and may weaken the fish immune system.
Fisheries
seyedeh abedi; mohammad khalesi; Sohrab Eskandari
Articles in Press, Accepted Manuscript, Available Online from 01 December 2013
Abstract
This research aimed at comparison of chromium bioaccumulation patterns in skin, gills, scales, liver and muscle of two widely-consumed fishes: scaled common carp Cyprinus carpio and scaleless catfish Pangasius hypophthalmus. First, lethal concentration (96 h LC50) of chromium as well as its toxicity ...
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This research aimed at comparison of chromium bioaccumulation patterns in skin, gills, scales, liver and muscle of two widely-consumed fishes: scaled common carp Cyprinus carpio and scaleless catfish Pangasius hypophthalmus. First, lethal concentration (96 h LC50) of chromium as well as its toxicity factor (TF) was determined for each species. For bioaccumulation trial, the two species exposed to sublethal concentrations (10% of LC50 values) of Cr at separate triplicate treatments for 15 days. The examined tissues from each species were sampled at days 7 and 15 of the experiment. Following chemical digestion, each tissue was analyzed by atomic absorption unit (Model Thermo) to measure chromium concentration. According to the results, Almost all differences in bioaccumulations between the two species and the controls were significant (p < 0.05). Concentration of chromium in common carp was in the form of gills> liver> skin> scales> muscle, and accumulation in catfish was in the form of liver> muscle> skin> gills. Final entire contents of Cr in the catfish's tissues were 3.65 times, than in the carp’s (excluding the scales). In addition, the catfish's muscle amassed 16.15 times greater amounts of Cr.The results of this investigation indicate that the carp's scaled armature, compared to the scaleless skin of the catfish, adsorbs metal toxicants leading to much lesser metals content in the muscle rendering this tissue rather safer for comestible consumption.
Fisheries
Elham Abdzadeh; Fatemeh Nazarhaghighi
Articles in Press, Accepted Manuscript, Available Online from 02 December 2013
Abstract
To evaluate the levels of cortisol, glucose and other possible indicators of goldfish ,Carassius auratus, in response to stress, in the first experiment, Bisphenol A (0.5 mg/L), Naphthalene (200 μg/L) and Butachlor (60%) (0.28 µg/L) were added to the aquariums water for two weeks. In the second experiment, ...
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To evaluate the levels of cortisol, glucose and other possible indicators of goldfish ,Carassius auratus, in response to stress, in the first experiment, Bisphenol A (0.5 mg/L), Naphthalene (200 μg/L) and Butachlor (60%) (0.28 µg/L) were added to the aquariums water for two weeks. In the second experiment, intra-peritoneal injections of Bisphenol A, Naphthalene and Butachlor,with dose 50 mg/kg, 50 mg/kg, 20 μL on the body weight of fish were performed. On the fifth day and the end of the experiment (fifteenth day) as well as 48 hours after injection, blood sampling from caudal vein was taken and levels of cortisol, glucose, total protein and blood plasma were measured inorganic phosphorous. The results showed that the cortisol and glucose levels on day 5, there was a significant difference between control and Butachlor treatments (P 0.05). Comparing the results of the analysis of blood plasma in the fifth and fifteenth days of experiment, it was found that levels of cortisol and glucose in the treatment Butachlor had significantly different together within two periods (P
animal biosystematic
Soheil Eagderi
Abstract
This study was conducted to survey the morphological variation in four populations of the Urmia kingfish (Alburnus atropatenae) using geometric morphometric technique. A total number of 163 specimens were collected from four rivers of the Urmia Lake basin including the Baneh, Saghezchai, Siminehrood ...
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This study was conducted to survey the morphological variation in four populations of the Urmia kingfish (Alburnus atropatenae) using geometric morphometric technique. A total number of 163 specimens were collected from four rivers of the Urmia Lake basin including the Baneh, Saghezchai, Siminehrood and Zarinehrood by electrofishing. The left side of specimens were photographed using a digital camera. Then fifteen homologous landmark points were selected and digitized on 2D pictures using tpsDig2 software. Landmark data after GPA, analyzed using PCA, CVA with obtained P-value from permutation test and cluster analysis. The patterns of population’s body shape were illustrated in relation to consensus configuration of all specimens. The results showed a significant differences between the body shape of studied populations. Based on cluster analysis, the studied populations according to their body shape were divided into Baneh clad and Saghezchai, Siminehrood and Zarinehrood clade. The Baneh, Saghezchai, and Siminehrood populations have deeper body and are distinguishable due to smaller head, posterior position of eye and shorter base of dorsal fin, respectively and Zarinehrood population was differentiable due to a more fusiform body shape and less body depth. These morphological differences can display ongoing evolutionary trends of studied populations as result of environmental conditions of their habitats and geographical isolation.
Fisheries
Bita Seraj; Mesbah Mehrzad; Paria Akbari
Abstract
In this study, in addition to the LC50 and the maximum allowable concentration, effects of silver nanoparticles on several of immune and blood serum enzymes parameters of Barbus grypus were determined For this purpose, 240 shirbut, to investigate the effects of sub lethal toxicity were divided as follows-control ...
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In this study, in addition to the LC50 and the maximum allowable concentration, effects of silver nanoparticles on several of immune and blood serum enzymes parameters of Barbus grypus were determined For this purpose, 240 shirbut, to investigate the effects of sub lethal toxicity were divided as follows-control treatment (G1), the concentration LC50 1% (0.012 mg/L AgNP) (G2), concentration LC50 2% (0.025 mg/L AgNP) (G3) and concentration LC50 4% (0.05 MG/L AgNP) (G4) and concentration LC50 8% (0.1 Mg/ L AgNP) (G5). Then on days zero, 7, 14 and 21 immune responses and serum enzymes (ALT, LDH, SGOP, SGPT) in Barbus grypus were measured. In the study, WBC counts increased significantly (P<0.05) in G2, G3, G4 and G5 treatments compared to control (G1). Serum anti-bacterial activity was enhanced in G3 in twenty first day and G4 and G5 in 14th and 21s days in compared to control. Serum lysozyme activity enhanced significantly (P<0.05) in (G4) in 14th and (G5) 14th and 21s in days compared to control. ALT and LDH Level decreased significantly in (G2), (G3), (G4) and (G5) treatments in 21s day compared to control. SGPT level decreased significantly in (G2), (G3), (G4) and (G5) in 21s day compared to control. SGOT level decreased significantly in (G3), (G4) and (G5) treatments in 21s day compared to control. According to the results of this study concentrations toxicity of nano silver increased immune responses and serum enzymes.
Fisheries
S. Pourmozaffar1* S. Pourmozaffar1*; *, M. Nafisi Bahabadi *, M. Nafisi Bahabadi; , A. A. Movahedinia , A. A. Movahedinia; M. Mohammady M. Mohammady; Kh. Pazir5 Kh. Pazir5
Volume 2, Issue 4 , March 2014, , Pages 1-14
Abstract
Abstract Thepurpose of this study was to evaluate the effects of salinity adaptation on some growth factors, hematology and chloride cell changes in the gills of the rainbow trout within 60 days.Experimental groups include fresh water, varied salinities of 15, 20 and 25 parts per thousand (ppt) respectively. ...
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Abstract Thepurpose of this study was to evaluate the effects of salinity adaptation on some growth factors, hematology and chloride cell changes in the gills of the rainbow trout within 60 days.Experimental groups include fresh water, varied salinities of 15, 20 and 25 parts per thousand (ppt) respectively. The results showed that increasing salinity was reduced daily growth and SGR but FCR increased (P
Fisheries
M Alizadeh; R Patimar; A Abdoli; M Farhangi; H Adineh
Volume 2, Issue 4 , March 2014, , Pages 15-25
Abstract
This study was conducted to determine regional variation in growth characteristics and age structure of Squalius cephalus (Linnaeus, 1758) in the Southern Caspian Sea basin from April to June 2011. A total of 958 specimens from 3 areas including: Golestan (area 1), Mazandaran (area 2) and Guilan(area ...
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This study was conducted to determine regional variation in growth characteristics and age structure of Squalius cephalus (Linnaeus, 1758) in the Southern Caspian Sea basin from April to June 2011. A total of 958 specimens from 3 areas including: Golestan (area 1), Mazandaran (area 2) and Guilan(area 3) were collected. In southern Caspian basin, the total length and weight of specimens ranged 22.00-30.00 cm and 138.62-347.70 g, respectively.The ages ranged from 0+ to 5+ years for males and from 0+ to 6+ years for females in all sampling areas. Parameters of von Bertalanffy growth function were different between males and females of each area and between the same sexes of different areas. The largest L∞ was found in the area 3 for female (L∞=38.97 cm).According to b values obtained, both sexes (except males of station 1) show a positive allometric growth. The highest values of condition factor were observed for males in early June. The result indicates that higher value of growth rate was for females.
