جستجوی مقالات مرتبط با کلیدواژه « استان خوزستان » در نشریات گروه « مهندسی دریا »

Gender determination in the fisheries industry is important for the propagation and cultivation of economically valuable fish. In fish meat, due to the extraction of caviar, the proper method of gender determination is essential. This research was conducted in 1396 on Siberian sturgeon (Acipenser baerii), in a closed circuit system, at the Hanusushadeh sturgeon farm, in Khuzestan province. To determine the gender, the fish were first anesthetized in a tub with 100 ppm of eugenol. They were then weighed using a digital scale, with a precision of one gram. In this research, gender determination of all fish was carried out with 100% accuracy. Of the 1,000 pieces of Siberian sturgeon, 630 male and 570 female pieces were studied. Females, in stages 2, 3 and 4 had a mean weight of 5254.32±48.82 g, 6670.49±56.75 g and 642.66±56.09 g, respectively, and were 3 to 4 years old. The average weight of male fish was 7238.62 ± 71.66 g. Given that gender evaluation on all fish was carried out using ultrasound, this method can be considered the best and most reliable method for determining the gender of sturgeon, as the use of methods which cause the least stress in fish is always a priority.

gbbggbThis study was conducted to determine and comparetrace elements, Fe, Zn and Cu in muscle of 8 species of endemic fish, Barbus grypus, Barbus sharpeyi, Barbus xanthopterus, Barbus pectoralis, Carasobarbus luteus, Liza abu, Barbus esocinus and Aspius vorax, in 2012.Seventy two samples of fishes were collected from Horolazim wetland in Khuzestan province.Concentration of heavy metals, following wet digestion,were measured by Perkin Elmer 4100 atomic absorption spectrometer. Data were analyzed by ANOVA using SPSS17 software at significant level of 5% (P=0.05). Concentration of Fe in muscle of fishes were not significantlydifferent (P>0.05). The zinc content in muscle of Barbus grypuscompared to other fishes were significantly different (P<0.05). Copper levels in muscle of fishes studied were significantly different (P<0.05). The mean concentration of Fe, Zn and Cu in muscle of fishes were 11.39±0.26, 12.94±0.38 and 0.62±0.004 mg kg-1, respectively. Also, the highest concentration of Cu was calculated in muscle of Barbus xanthopterus (mg Kg-1). The average concentration of Zn and Cu in muscle of fishes were lower than WHO permissible levels.

This study was performed in 2013 with the aim of increasing productivity in Barbus grypus and Barbus sharpeyi breeding, together with culture ducks in a period of 8 months, from April to December, in Hantoushzadeh culture farm, in Dolati village of Dezfoul city in Khuzestan province. In this study 2 random treatments were designed and every treatment was performed in a pool of 3 hectares. In both treatment and control pools 900 pieces of fish consisting of 450 pieces Barbus grypus and 450 pieces of Barbus sharpeyi (50% Barbus grypus, 50% Barbus sharpeyi) with an average weight of 20.62±8.67 and 21.5±7.77 g. In the treatment pond 1350 ducks of 15 days old of 300±47.56 g were introduced in 3 stages at intervals of beginning of the period and at the second and third months. The average temperature in the treatment and control ponds were 28.68 ± 2.92 °C. The pH in the treatment and control ponds was 8.70±0.68 and 8.61±0.55, respectively. As the weight average of Barbus grypus and Barbus sharpeyiin the treatment pond were 1126.6g and 770g,therefore the average production of the two species, was 506970±255.23g and 346500±486.55g respectively. Considering that in the control pool, the weight averages of Barbus grypus and Barbus sharpeyi were 1050 and 660g respectively, and the production was 472500±138.48g and 297000±172.76g, an increased production is noticed in pond with ducks (treatment pond) (P<0.05). In the treatment pond the initial and final weights of breeding ducks were 300±47.56 and 310±59.38 g, respectively. Considering that the weights of ducks rose to 3100 g, the duck meat production was 4185000 per hectares.In general it can be concluded that integration of fish breeding ponds with duck farming increases fish production and efficiency. There is also an increase in the production of duck meat.

Carassobarbus luteus fish, one of the Cyprinidae species and native to southwestern Iran, have been identified in the domestic water in the rivers and wetlands of Khuzestan Province. This study was performed Fecundity of Carassobarbus luteus in Karun River. Monthly catches from February 2012 to April 2013 at three stations in the province took Aghili Plains. 385 samples of fish were collected from the study area to determine fecundity of ovarian tissue were selected samples in sexual stages 3, 4, 5. Mean of absolute fecundity of Carassobarbus luteus was 5754.59±7 and range from 740 to 43301 eggs. The highest of absolute fecundity in Length apperceive 205 to 210 mm equal 26800±1660.45. Also, the lowest of absolute fecundity in Length was 185 mm equal 1018±52.68. Also mean of relative fecundity in fishes 53.30±1.03 and minimum and maximum from 9 to 248 eggs. The highest of relative fecundity in Length apperceive 200 to 205 mm equal 222.8±10.38. The lowest of relative fecundity in Length was 185 mm equal 9.16±0.25.

In this one year study, the growth parameters of Indian carp, broodstock Catla catla such as: the percentage weight gain (WG), Average Daily Growth (ADG), Specific Growth Rate (SGR), condition factor (K), length and weight of biometrics and also, some environmental parameters during the 1389 to 1390 were measured seasonally. For this, 16 brood stock Catla fish, with a sex ratio of (1:1) which was almost equal, from three ponds of 1700 m2, in which they were released, were used. Ponds before stocking, were enriched by manure. Also during the period, were enriched with chemical fertilizer. Broodstock were also provided with concentrate diet (Byza fars Company) every morning and evening. The relationship between length and weight were obtained, for the females b=3/21 and for males b =2/93. This indicates that such growth is isometric. In this relationship, the female and male respectively, equivalent to y = 0.007x3.2165 and y = 0.0197x2.9377. Growth parameters for the total period was as follows: (WG) {females: 114/27, male: 211/61}; (ADG) {females: 3/08 male: 3/68}, (SGR) {females: 0/09, male: 0/2} and Obesity factor in the broodstock was between 1/54 and 1/76 respectively. On the whole, according to prevailing environmental conditions and fish physiology, growth indicator species is acceptable. Physico-chemical factors also revealed a normal process. The results obtained showed that the adaptability of carp Catla, with the climate condition of the province (long periods of heat) is possible.

We assessed concentration of heavy metals Mn, Cu, Zn and Fe in the muscle, liver and gill tissues of Liza abu in Karoon and Bahmanshir Rivers in Khoozestan Province in winter 2009. Metals were extracted from the tissues using wet digestion method. Concentration of the heavy metals were measured by Atomic Absorption Spectrophotometer. The highest concentration of Mn, Cu, Zn and Fe was 0.706±0.013, 0.428±0.020, 11.74±0.40, 14.04±0.08 mg/Kg. and the determined lowest concentration of Mn, Cu, Zn and Fe was 0.646±0.012, 0.289±0.033, 9.74±0.26, 11.81±0.34 mg/Kg. respectively The results showed concentration of heavy metals Mn and Zn in the muscle, liver and gill of Liza abu in Karoon and Bahmanshir Rivers found no significant difference between them (P≥0.05). Cu in the muscle and liver showed a significant difference (P≤0.05), but in gill there was no significant difference (P≥0.05). Fe in the liver and gill showed no significant difference (P≥0.05) but in the muscle there was a significant difference (P≤0.05).