Showing 56 results for Growth
Mohammad Hadi Rezaei, Iman Sourinejad, Siavash Soltanian, Morteza Yousefzadi,
Volume 2, Issue 2 (10-2012)
Abstract
The improvement of immune system and increasing growth and survival of fishes especially at early stages is important for fish culturists. Considering the effects of herbal immunostimulants on innate immunity and growth of fish, the impacts of dietary Salvia macrosiphon extract on some growth and immunological parameters of fingerlings Pangasianodon hypophthalmus were investigated. Fishwith mean weight of 1.27±0.24 were fed diets supplemented with S. macrosiphon extract at 0 (control group), 150, 300 and 600 mg/kg diet for 45 days. After the feeding trial, fish growth and hematological parameters was analyzed using Duncan test at 95% confidence. Fish growth parameters were not significantly different between treatments at days 15, 30 and 45. All the treatments showed almost 100% of survival. The lowest haematocrit level was observed at control (41.33 ± 4.16%), while the highest (44.56± 2.00%) was at 300 mg/kg diet of Salvia extract. Mean number of WBC and RBC was not different between the treatments. WBC differential count revealed that the highest percentage of neutrophil was in treatment 2, the highest percentage of lymphosyte in treatment 1 and the lowest percentage of monocyte in treatment 3. The mean values of MCV, MCH, MCHC, Hemoglobin, Albumin and total protein had no significant difference between the treatments. The amount of lysozyme was significantly different with the highest amount in treatments 2 and the lowest in treatment 3 (p<0.05).
Zeinab Fazaei, Mir Masoud Sajjadi, Iman Sourinejad, Reza Asadi,
Volume 2, Issue 2 (10-2012)
Abstract
This study was conducted to investigate the effect of rearing at differing densities and dietary supplementation with vitamin E on growth indices, survival and carcass composition in fingerling rainbow trout in a 6-week trial. Rainbow trout juveniles with initial body weight of 9.6 ± 0. 69 g at two densities of 50 and 100 pieces per 50 liter were fed two diets with the same protein and fat content. Experimental diets were diet 1 without adding vitamin and diet 2 with adding 600 mg/kg of vitamin E. A total number of 900 rainbow trout juveniles in four treatments, each in three replicates as T50(0) (with the density of 50 and feeding with diet 1), T100(0) (with the density of 100 and feeding with diet 1), T50(E) (with the density of 50 and feeding with diet 2) and T100(E) (with the density of 100 and feeding with diet 2) were randomly distributed. After 6 weeks of feeding, growth performance, feed conversion ratio and viability were significantly differentbetween treatments (P˂0.05). T50(0) and T50(E) had higher weight gain, specific growth rate and viability than T100(0) and T100(E) (P˂0.05). Feed conversion ratio was higher in T100(0) and T100(E) (P˂0.05). Carcass composition was not significantly differentbetween treatments (P˃0.05). The results showed that dietary vitamin E supplementation in rainbow trout juveniles did not have significant effect on growth, feed conversion,survival and carcass composition but density was a key factor in growth, feed conversion ratio and survival.
Mohammad Movahedi-Nia, Ehsan Kamrani , Iman Sourinejad , Hossein Rameshi , Shahram Seydmoradi , Hassan Sareban ,
Volume 2, Issue 4 (4-2013)
Abstract
As pearling has been banned since 2006 in Persian Gulf, growth and mortality rate of Mohar pearl oyster in its old habitats was surveyed in present research. For early survey and identification of habitats of Mohar pearl oyster Pinctada radiata, primary sea tours in coastal waters of Lavan Island, were done. Two habitats were identified and sampled seasonally from autumn 2011 to summer 2012, to investigate Pinctada radiata stock condition. Belt transects and random quadrates method was used in this sampling. Infinity length, L∞, in Lavan No. 1 (Dardoor) and Lavan No. 2 (Hedabad) habitats was 89.16 and 87.68 mm. Growth constant, K, estimated 0.34 and 0.44 year-1in that two habitats. The amount of t0 for oysters in Dardoor and Hedabad habitats was -0.36 and -0.28 year and tmax was estimated equal to 8.46 and 6.54 year respectively. Natural mortality constant, M, was 0.63 and 0.75 year-1 respectively. Analyses of growth constant, K, revealed that this figure has decrease in these habitats in recent years. Investigation of recruitment plots indicated semi continuous pattern of recruitment in pearl oysters, demonstrating that reproduction occurs in almost throughout the year although two peaks of reproduction were observed in summer and winter.
Mohammad Hadi Rezaei, Iman Sourinejad, Siavash Soltanian, Morteza Yousefzadi,
Volume 3, Issue 1 (7-2013)
Abstract
Low survival at early stages of life is of great concern for fish culturists. Considering the effects of herbal immunostimulants on innate immune response and growth improvement of aquatic animals, the impacts of a native herb of Hormozgan province named Zhumeria majdae extract on growth indices and immunology of catfish fingerlings Pangasianodon hypophthalmus with mean weight of 1.27±0.24 were investigated. Fish were fed diets supplemented with Z. majdae extract at 0 (control group), 150 (treatment 1), 300 (treatment 2) and 600 (treatment 3) mg/kg diet for 45 days. After the feeding trial, fish growth, hematology and immunology parameters were analyzed using Duncan test. Fish growth parameters including FER, DGI and SGR were not significantly different between treatments at days 15, 30 and 45. Survival percentage in all treatments supplemented with herb extract was 100%. The highest haematocrit level was at treatment 3 (46.67±7.64%), The highest number of RBC (3.10±0.6×106) and WBC (7.40±0.3×103) and also the highest amount of total protein and albumin was at control group, the highest amount of hemoglobin, MCV and MCH was at treatment 1 and the highest NBT and MCHC value was at treatment 2. In white blood cell differential count, the highest percentage of neutrophil was observed in control group, the highest percentage of lymphosyte in treatment 1 and the highest percentage of monocyte in treatment 3 .The amount of lysozyme was significantly different with the highest amount at treatments 3 and control, respectively and the lowest in treatment 2 (p<0.05).
Zahra Azh, Iman Sourinejad, Ehsan Kamrani, Mehdi Ghodrati Shojaei,
Volume 3, Issue 2 (10-2013)
Abstract
Length weight relationship, condition factor and length at first maturity of Indian halibut Psettodes erumei were investigated in the Persian Gulf by monthly sampling of 30 fish from March to February 2012. Mean value of total length and weight were 38.68 ± 9.39 cm and 986.92 ± 756.79 gr, respectively. Maximum and minimum values of total length were in August (44.43 ± 6.37 cm) and March (23.27 ± 2.32 cm), respectively. Maximum and minimum values of body weight were in January (1540.73 ± 1358.69 g) and March (134.52 ± 40.13 g), respectively. Analysis of length frequency distribution showed that the most frequent length category was the category of 39-42 cm with 56 fish that is equivalent to 17.89% of total samples. 52.4% of caught fish had a total length less or equal to 39 cm. Total length-weight relation in Psettodes erumei was calculated as W=0.005TL3.284 with R2= 0.973. Regarding significant difference between the estimated b and the number 3 with 0.95% confidence, the growth type of this species was determined to be positive allometric in the Persian Gulf. Condition factor was calculated to be 1.57 in Psettodes erumei in the Persian Gulf waters. Condition factor has increased from March to July and then decreased to December. Length at first maturity was estimated to be 39.3 cm of total length in Psettodes erumei.
Ahmad Alaei, Seyed Yousef Paighambari, Ali Salarpouri, Zohre Mazaheri,
Volume 3, Issue 3 (1-2014)
Abstract
Sind sardine Sardinella sindensis (Day, 1878) is the most important ecological and commercial surface resources in Persian Gulf and Oman sea. This study was carried to study some population dynamics parameters of Sind sardine in Coastal waters of Jask Province during January 2011 to December 2012. A totall 2887 specimens were collected from commercial fishing Purse seiners, monthly. Biometric parameters were measured. The mean length and weight were 14 cm, 29 g respectively and the most dominated length group was 14-15 cm (24.7%). The Von Bertalanffy growth parameters were calculated as L=19.5 (cm), k=1.18 (year-1), t0 = -0.18. Weight- length relationship showed an isometric growth and it was W = aL3.0522 (r2= 0.9432). The natural (M), fishing (F) and total (Z) mortality were 2.19, 0.87 and 3.06 per year respectively. The exploitation rate (E) was 0.29.
Ommolbanin Taheri Kondor, Mir Masoud Sajjadi, Iman Sourinejad, Abd- Alrasoul Daryaei, Ghodrat Mirzadeh, Fereshteh Khademi,
Volume 3, Issue 3 (1-2014)
Abstract
One of the major issues in aquaculture is to keep balance between growth rate of fish and optimal use of consumed food. L-carnitine is considered an effective food supplement for fish growth. Sobaity seabream is one of the commercially important species in the Persian Gulf that is highly considered in aquaculture too. Growth indices and survival rate of 240 Sobaity fingerlings with mean weight of 3.01±0.03g were investigated during ten weeks after supplementing diet with L-carnitine. The study was performed with four levels of 0.0, 500, 1000 and 1800 mg L-carnitine per kg of diet each with 3 replicates based on the satiation. Sobaity fingerlings fed the level of 1000 mg L-carnitine per kg of diet had the highest growth rate and the lowest feed conversion rate (P<0.05). The highest average specific growth rate, percentage body weight gain, daily growth rate and protein efficiency ratio was obtained in level of 1000 mg L-carnitine per kg of diet (P<0.05). Condition factor and survival rate were not significantly different between the treatments (P>0.05). Based on the results, supplementation of diet with L-carnitine would favorably influence the growth performance of Sobaity and the most effective dose on growth indices was the level of 1000 mg L-carnitine per kg of diet.
Amin Oujifard, Aali Hosseini, Mehrdad Mohammadi Dost, Emad Sadoni,
Volume 3, Issue 4 (4-2014)
Abstract
Asian seabass (Lates calcarifer) is a potential candidate species for rearing in pond system in Iran because of its fast growth rate, ability to adapt to varying environmental conditions and its demand in domestic as well as export markets. Hence, growth parameters, survival and body composition of Asian seabass (20.70±0.36 g) was investigated. Experiment was conducted in three ponds In Choebde, Abadan with 3500 fish per pond. Diets were fed to fish five times daily until satiation for 135 days. Temperature and salinity were maintained at 27.36°C, 18.66 ppt respectively, while dissolved oxygen did not fall below 5.7 mg L−1. At the end of the trial, final weight 474.71±7.85 g, FCR 0.98±0.02, SGR 2.29±0.03, PER 2.30±0.05 % and survival 85% was obtained. Also, protein and lipid of body composition was 21.98±0.60 and 1.99±0.09 percent, respectively. Results show that Asian seabass can be ideal aquaculture candidate species in Khuzestan province.
Sedighe Rezaei, Seyed Yousef Paighambari, Hadi Raeisi, Mohamad Javad Shabani,
Volume 3, Issue 4 (4-2014)
Abstract
This study was performed to estimate the growth parameters and mortality rate of (Nemipterus japonicus Bloch, 1971) with using length frequency data in Bushehr fishing grounds. sampling did monthy with using cutlassfish pelagic trawl, gillnet and bottem trawl. The growth parameters of k and L∞ were estimated 0.79 y-1 and 31.5 cm respectively. The t0 was estimated -0.2. b quantity for this species equals to 2.71 which indicating the negative allometric growth model. W∞ quantity estimated about 390.07 g The exploitation rate (E) For this species was 0.31,with respect to fishing effort it is low and it shows that this stock has potential for more exploit too.
Seyed Hamed Hosseini, Iman Sourinejad, Sedigheh Ashori, Amir Ali Moradinasab,
Volume 4, Issue 1 (7-2014)
Abstract
Present study aims to determine suitable dose of inulin in Piaractus brachypomus fry diet and its effect on growth, survival and some hematologic indices in this species. In this research, one basic diet as control and three experimental diets including three levels of 1, 2 and 3% inulin each with three replicates were considered. Fish with mean initial weight of 2.31±0.14g were fed with experiment diets for 8 weeks. Results showed that the level of 2% prebiotic inulin in diet caused the increase of final weight gain and specific growth rate and improved food conversion rate (P<0.05). Furthermore, the level of 2% prebiotic inulin in diet increased the amount of blood hemoglobin and hematocrit compared to other treatments (P<0.05). Protein efficiency rate, survival rate and blood total protein was not significantly different among treatments. Results of this research revealed that using the level of 2% prebiotic inulin in red Pacu diet causes the improvement of growth and nutrition function as well as some blood immunologic factors in this species.
Fatemeh Shahaliyan, Alireza Safahieh, Negin Salamat, Fatemeh Mojodi, Mostafa Zaredoost,
Volume 4, Issue 1 (7-2014)
Abstract
Biodegradation is an economical and efficacious option to purification among purifying methods. Capable PAHs degrading microorganisms are common in sediments contaminated by these compounds. Purifying ability enhance with biosurfactant production by microorganisms. Hence in this research after isolation and identification of two antheracen resistant bacteria, Pesudomonas aeruginosa and Pesudomonas putida, from Khore Musa oil polluted sediments, growth rate and biosurfactant production comparisons were studied. Three techniques, Blood agar, Drop collaps and Oil spread, were used in order to biosurfactant production scrutiny. Results showed that both species had good growth in media containing 10, 20 and 30 mg/lit anthracene but P.aeruginosa had more growth and biosurfactant production in these 3 concentrations.
Milad Adel, Reza Pourgholam, Seyed Jalil Zoriehzahra, Reza Safari, Maryam Ghiasi,
Volume 4, Issue 4 (4-2015)
Abstract
This study was conducted to evaluate the effects of different levels of Mentha piperita extract on growth factors, body composition, intestinal bacteria and survival rate of Oncorhynchus mykiss in challenging with Yersinia ruckeri. For this purpose, four groups of fish with mean weight of 32. 2± 0.12 g were raised for 8 weeks in Vniro tanks, 80 fish to each tank and feeding with different levels of M. piperita (with concentrations of % 0, % 1, % 2.0 and % 3.0, 3 replicates for each treatment). At the end of the trial, growth factors, intestinal bacteria and survival rate of fish in challenging with Y. ruckeri were determined in different groups. Results showed that O. mykiss fed on a diet supplemented with 3% M. piperita had significantly higher growth factors, lactic acid bacteria, and survival rate compared to other treatments (P<0.05). Although, the study of body composition showed no significant difference between different treatments (P>0.05). Based on the results, using of M. piperita extract, especially at the level of 3 % can improve the growth performance and survival rate of O. mykissmykiss in challenging with Y. ruckeri and was recommended in the diet.
Rudabeh Rufchaie, Seyed Hossein Hoseinifar, Somaie Sarmast Nafoti, Shirzad Hasanzade,
Volume 5, Issue 1 (7-2015)
Abstract
In this study, the effects of different diets on growth rates of Gammarus Pontogammarous meoticus were determined. A biomass of 1.5 g Gammarus with an average length of 7 ± 0.25 mm was transferred to the glass aquaria with volume 900 cm3 (volume 2.5 l). The Gammarus were fed with diets include baked potato (treatment 1), 30 percent yeast and 70 percent potato, (treatment 2), 50 yeast percent and 50 percent potato (treatment 3), no feeding (treatment 4) at rate of 6 to 7 percent of total biomass for 45 days. Results showed that the total production rate (adult and baby), specific growth rate and population doubling time were significantly high in treatments 2 and 3(P > 0.05). The biomass and daily growth rate were significantly higher than yeast fed Gammarus (P> 0.05). Additionally Gammarus in treatment 3 had the highest food conversion ratio. The results of the present study showed that the administration of yeast in diet can improve Gammarus growth rate under culture conditions.
Maryam Norouzi, Keyvan Abbasi,
Volume 5, Issue 1 (7-2015)
Abstract
This study aimed to determine sex ratio, age, growth and reproduction of the populations of R.amarusin Sefidroodriver. In total 189 fish were caught monthly from February to June 2013. Overal sex ratio was 1:1/39. Total weight (W) and total length (TL) was 17/2-71/2mm and 0/06-5/81g, respectively. The condition coefficient of males was higher than females. Growth models in all population were positive allometric for males and females. Fishes in Sefidrood river population had 1 till 9 age group.The average number of eggs was 78.778±33.11. Fecundity (F) with fish total length (TL) and weight (W) had significant correlation. The results of this study would help to increase the information of these species.
Milad Adel, Reza Safari, Hadi Monji, Seyed Mohammad Vahid Farabi,
Volume 5, Issue 1 (7-2015)
Abstract
This study was conducted to evaluate the effects of different levels of Mentha piperita extract on growth factors, survival rate and body composition of Rutilus frisii kutum fry. For this purpose, four groups of fish with mean weight of 1.12± 0.14 g were raised for 56 days in plastic tanks (40 fish to each tank) and feeding with different levels of M. piperita with concentrations of 0, 1, 2.0 and % 3.0. At the end of the trial, growth factors (final weight, weight gain, SGR, feed conversion ratio (FCR), survival rate and body composition were determined and compared with control group. Our results showed that R. frisii kutum fry fed on diet supplemented with 3% M. piperita had significantly higher growth factors and survival rate compared to other treatments (P<0.05). The study of body composition showed no significant difference between different treatments (P>0.05). Based on the results, using of M. piperita extract, especially at the level of 3.0% can improve the growth performance and survival rate of R. frisii kutum fry.
Zahra Azh, Iman Sourinejad, Seyed Ali Johari,
Volume 5, Issue 2 (10-2015)
Abstract
Regarding the importance of studying inland water fishes specially the fish living in qanats, some morphology characteristics, length-weight relationship and growth type of Turkmenian loach Paraschistura sargadensis living in Aran qanat, Baft city were assessed by standard protocols. Range of total length was 25.1-51.38 mm, standard length was 20.65-43.10 mm, fork length was 23.41-46.85 mm, body depth was 2.97-4.66 mm and the weight of fish was 0.12-0.81 g. Total length- weight relation was as W=0.000012TL2.86 with r2= 0.978. According to the results of Pauly test, the value of “b” obtained had a significant difference with value of “3” and hence, the growth type of this species is allometric in Aran qanat.
Arash Shakori, Mokhtar Amouei, Javad Ghasemzadeh,
Volume 5, Issue 3 (1-2016)
Abstract
The present study investigated age and growth patterns of the Dwarf snakehead Channagachua from Sarbaz River. A year round regular monthly collection of this species was carried out from June 2013 to May 2014 (Except in August). The specimens total length and total weight ranged from 13 to 153 millimeters, and 0.04 to 49.49 grams respectively. Sex ratio was 1: 1.23 in favor of males. Length–weight relationship was calculated as W = 0.0089TL 3.11 (r2= 0.99) for males and W = 0.0079TL 3.16 (r2=0.99) for females and for the entire Sexes combined as W = 0.0103TL 3.04 (r2=0.99) being all metrically positive for both sexes. Age determination by opercula readings revealed that the majority of specimens belonged to the age group of 3+, with 6+ being the oldest age recorded for both sexes. The von Bertalanffy growth model was estimated as Lt =21.78[1- exp-0.16(t + 3.62)] for males,Lt =25.40[1-exp-0.13(t + 0.32)] for females and Lt =26.44 [1-exp- 0.12(t + 3.72)] for the whole Sexes combined. The highest values of condition factor were obtained in December and April for both sexes. The results indicated that biological factors such as growth and sex ratio in Dwarf Snakehead species from Sarbaz River show considerable differences compared to the specimens from other localities of its natural habitats.
Seyed Mehdi Soleimani, Mir Masud Sajjadi, Bahram Falahatkar, Mohammad Ali Yazdani,
Volume 5, Issue 3 (1-2016)
Abstract
A 12-week feeding trial was carried out to assess the effect of fish meal replacement by earthworm meal (Eiseniafoetida) on growth performance, feed efficiency and carcass composition of Siberian sturgeon (Acipenserbaerii). Fish with mean weight 21.32 ± 1.91 (mean ± SD) were fed with five experimental diets which 0% (Control), 10% (EWM10), 20% (EWM20), 30% (EWM30) and 40% (EWM40) of fish meal protein was replaced by earthworm meal protein. At the end of the feeding trial final body weight, weight gain, condition factor, feed coefficient ratio (FCR) and specific growth rate (SGR) were monitored. Fish fed EWM10 and EWM20 had highest weight gain and final weight respectively but no significant differences were observed between different treatments (P>0.05). Fish fed EWM40 had lowest final weight and weight gain and significant differences were observed between this treatment and EWM10 and EWM20 (P<0.05). The whole carcass protein and ash content were not influenced by earthworm meal replacement and significant differences were not observed between different treatments (P>0.05). Fish fed EWM30 showed lowest carcass lipid content that was significantly lower than control treatment (P< 0.05). This treatment also had highest moisture content and was significantly higher than control treatment (P<0.05). The results of the present study showed that inclusion of earthworm meal in diets can improve growth performance and feed efficiency. So 10 to 20% of fish meal can be replaced with earthworm meal without negative effects on growth performance of the Siberian sturgeon.
Vahid Zadmajid, Ardeshir Sheikhahmadi, Barzan Kamangar, Teimor Javadi,
Volume 5, Issue 4 (5-2016)
Abstract
In this study, we divided 300 goldfish (average weight: 12.30 ± 2.11 g) into 4 groups. Fish were fed diets that contained 4 levels of thyme extract: 0 (control), 200, 400 and 800 mg/kg (Thyame, LN23IN, France) for a period of 2 weeks. At the end of 2 weeks, each group of the mentioned treatments was divided into 2 groups: nanosilver-exposed group and control. In the aquarium of the nanosilver-exposed group, we prepared 0.04 mg/L of nanosilver until the end of the experiment. At the end of the experiment, body weight (BW), condition factor (CF), specific growth rate (SGR), feed conversion ratio (FCR), survival rate and serum biochemical parameters of glucose (mg/dl), triglycerides (mg/dl) and uric acid (mg/dl) were measured. The results showed that the nanosilver-exposed group that consumed the diet with 800 mg/kg of thyme extract had the highest percentage of weight gain (21.46 ± 0.15) and specific growth rate (0.46 ± 0.01). All nanosilver-exposed groups had lower survival rate than non-exposed groups. The condition factor (CF) in treatments that contained thyme extract in the diet was significantly higher compared with the control group (P<0.001). The lowest feed conversion ratio (FCR) was observed for the nanosilver-exposed group fed with 400 mg/kg of thyme extract. On the other hand, by reducing the concentration of thyme extract in the diet and placing the fish under nanosilver stress, we observed significantly incrased serum glucose and uric acid concentrations (P<0.001). In groups exposed to nanosilver, blood triglyceride concentrations showed a relative non-significant decrease compared to the controls. The results showed a significant, positive impact of high concentrations of thyme extract on growth factors and reduced stress in fish exposed to nanosilver.
Razieh Gholami, Reza Davoodi, Amin Oujifard, Hamidreza Nooryazdan,
Volume 5, Issue 4 (5-2016)
Abstract
We conducted this study to determine the chronic effects of Azadirachtin on growth parameters, survival and gill morphology of grass carp [Ctenopharyngodon idella (C. idella)] with an average weight of 11.09±2.3g. We equally distributed 120 fish between three treatments and a control group, with three replicates each. Sublethal concentrations of poison, 0.073 (10% LC50), 0.15 (20% LC50), 0.22 ppm (30% LC50) were selected. Fish were exposed to these doses for 28 days. Increasing doses of Azadirachtin did not affect growth parameters and survival (P>0.05). During the test, we observed fish behavior patterns of irregular swimming, rotation, reaction increased response versus stimulus exterior, solitary and imbalance, histology, epithelial uplifting (swelling), hyperplasia, fusion of gill lamellae and necrosis of gill epithelial cells. The results showed that although the sublethal dose of Azadirachtin over a short time did not affect growth and survival of C. idella but brought about abnormal behavior in fish. There was increased gill tissue destruction with increased poison levels which showed that it could be effective on long duration of exposure.
