Fisheries
Madat Balouch; Seraj Bita; Nazanin Ghorbani Ranjbari
Abstract
The present study was carried out with the aim of determining the biometric factors, length and weight relationship, frequency percentage of length and weight groups, and identification of food groups consumed in Alepes djedaba fish caught from the coast of Makkoran. For this purpose, 120 samples of ...
Read More
The present study was carried out with the aim of determining the biometric factors, length and weight relationship, frequency percentage of length and weight groups, and identification of food groups consumed in Alepes djedaba fish caught from the coast of Makkoran. For this purpose, 120 samples of Alepes djedaba were collected from the three catchment areas of Ramin, Haft Tir and Tis in Makkoran coast located in Sistan and Baluochistan province seasonally from autumn 2019 to summer 2020. The prepared fishes were caught by traditional fishing boats. After the fishes were prepared and transferred to the laboratory, the biometric characteristics, including the total length and body weight, were measured and the pattern of growth was determined. In the next step, in order to identify the food items, the contents of the digestive system were separated and identified. The results of the present study showed that the Alepes djedaba caught in the Makkoran coast in different seasons have different length and weight ranges. The average total length and weight of the fish were 28.00±4.68 cm and 311.18±12.00 gr, respectively. Based on the results, the value of b in the length-weight relationship to determine the growth pattern did not show a significant difference with the number 3 (p>0.05), which indicates isometric growth in this species. Food items identified in the stomach contents of this species included fish and crustaceans. According to the food items identified in the digestive system of the studied fish, it seems that this species is an advanced predator that is at the top of the food chain. Therefore, despite the differences in the composition of the population of food items in each environment, this fish feeds on a relatively constant diet including various types of fish and small crustaceans. From the obtained results, it can be stated that this species is carnivorous and its growth is isometric, and in different seasons of the year, different length and weight groups of this fish are caught in the Makkoran coast.
Fatemeh Moradi; Hamidreza Aliakbarpour; Seyed- Masood Hashemi
Abstract
Different acidifiers have been introduced for animal nutrition in terms of type of organic acids and their composition. This study aimed to investigate the effects of consumption acidifier obtained from a mixture of organic acids (containing formic, citric, propionic and acetic acid and their salts) ...
Read More
Different acidifiers have been introduced for animal nutrition in terms of type of organic acids and their composition. This study aimed to investigate the effects of consumption acidifier obtained from a mixture of organic acids (containing formic, citric, propionic and acetic acid and their salts) on the broiler chicks growth performance and some intestinal parameters .Therefore, one hundred eighty 1-d old male Ross broiler chicks were studid in a completely randomized design to 3 nutritional treatments with 6 replicates and 10 broiler chicks in each replicate, from d 0 to 35 posthatch. The treatments included 1. a corn-soybean based commercial diet or Un-supplemnted diet (Control), 2. Control diet supplemented with acidifier daily and 3. Control diet supplemented with acidifier every other day. All of dietary treatments were formulated to meet the National Research Council (1994) and Ross nutrient requirements for starter (1 to 11 d), grower (12 to 24 d), and finisher (25 to 35 d) growth periods. The results showed that in the starter and grower phase, feed intake in groups 2 and 3 that had consumpted organic acids were less than control group or un-supplemented organic acids (P˂0.05). In the starter phase, mean of body weight gain of un-suplemented group or control was higher than the groups 2 and 3 or supplemented daily and every other day group, respectively (P˂0.05); but experimental groups showed no significant change in their body weight gain during grower and finisher phases as well as whole rearing period affected by consumption of organic acids. The group 2 (daily supplemented) had better feed conversion ratio than control group during growth period (P˂0.05). The mean of ileal Enterobacteriaceae counts for the groups that had consumpted acidifiers (daily or every other day) were significantly lower than control group (P˂0.05). The mean of villus length, villus width, crypt depth and villus height to crypt depth ratio of the ileum had no significant difference between groups affected by consumption of organic acids. The pH of ileal and duodenal contents between groups showed no significancy. The results of the present study revealed that supplemented diets with organic acids can reduce some of intestinal pathogens, improve the feed conversion ratio. Daily consumption of Organic acids was more effective than when it was consumption every other day for the bird growth performance characteristics.
Fisheries
Abdoljabbar Irani
Abstract
In this study, rainbow trout diploid, triploid, and tetraploid were comparatively investigated regarding the growth performance, survival rate, and erythrocyte characteristics. For the triploid production, the fertilized eggs received 26.5 ℃ thermal shock under three treatments: 1. double ...
Read More
In this study, rainbow trout diploid, triploid, and tetraploid were comparatively investigated regarding the growth performance, survival rate, and erythrocyte characteristics. For the triploid production, the fertilized eggs received 26.5 ℃ thermal shock under three treatments: 1. double 1-min shock after 15 and 30 min of the fertilization, 2. one 15-min shock after 15 min of the fertilization, and 3. one 12-min shock after 20 min of the fertilization. Tetraploidy was induced by application of 28 ℃ thermal shock under three treatments: 1. 10-min shock after 59 degree-hours of the fertilization, 2. 10-min shock after 66 degree-hours of the fertilization, and 3. 10-min shock after 72 degree-hours of the fertilization. The best triploidization results, 66.6% survival rate and 87% triploidization rate, achieved by application of 12-min shock after 20 min of the fertilization. The best tetraploidization results, 54.9% survival rate and 7.94% triploidization rate, achieved by application of 10-min shock after 59 degree-hours of the fertilization. There were no significant differences between the triploid and diploid fish, wheras the tetraploids showed significantly lower growth rate than the diploids. In conclusion, in this study, triploid and tetraploid production of rainbow trout were improved, and application of erythrocyte cell size as a reliable and efficient polyploidy detection method was emphasized.
Seyed Mohammad Mousavi; Fereshteh Ghaeidi; Nasim Zanguee; Mohammad Zakeri
Abstract
Abstract
In this study, the effect of dietary intake of different levels of Cumin (Cuminum cyminum) extract on juveniles of Cyprinus carpio, was studied. For this purpose, 150 common carp juveniles (with mean weight: 20.3±0.89 gr) were randomly distributed in 15 fiberglass tanks (10 fish per ...
Read More
Abstract
In this study, the effect of dietary intake of different levels of Cumin (Cuminum cyminum) extract on juveniles of Cyprinus carpio, was studied. For this purpose, 150 common carp juveniles (with mean weight: 20.3±0.89 gr) were randomly distributed in 15 fiberglass tanks (10 fish per tank) and fed by commercial diet containing 0% (control group), 0.5%, 1%, 1.5% and 2% of ethanolic cumin extract (treatment groups). The fish were fed by apparent satiation thrice the day for 8 weeks. At the end of the experimental period, different growth parameters including weight gain, Daily growth rate, Specific Growth Rate, some condition factors, viscera somatic index, hepatosomatic index and nutritional indices including food conversion ratio, protein efficiency ratio, lipid efficiency ratio, total feed intake, net protein utilization, net lipid utilization were assessed. The results showed that administration of different levels of cumin extract in diets of juveniles of Cyprinus carpio caused an increasing effect on weight gain, daily growth rate and specific growth rate (P<0/05) compared to control group. The highest rate of these factors was observed in diet containing 2% of cumin extract and the lowest rate was for control group. According to the results of this study supplementation of 2% cumin extract to diet of juveniles of Cyprinus carpio may improve growth parameters and this herbal extract may presented as a growth promoter in carp culture.
Tooraj valinasab; Eassa Kamali; Reza Dehghani; Hojjatollah Fourooghifard
Abstract
Abstract The study of age and growth of aquatics is basic and necessary information for further fisheries management. By aging the fishes, we can estimate the population dynamics parameters such as growth and mortality rates. In this study the Otolithes ruber (Tiger toothed croaker) was selected as one ...
Read More
Abstract The study of age and growth of aquatics is basic and necessary information for further fisheries management. By aging the fishes, we can estimate the population dynamics parameters such as growth and mortality rates. In this study the Otolithes ruber (Tiger toothed croaker) was selected as one of the most important and commercial species for aging from September 2008 to November 2009. During 15 months, a total of 540 specimens were collected and 238 sagitta otoliths were extracted and then were sectioned in laboratory using microtome cutter. The sectioned otoliths were aged by reading the increment rings. The overall Von-Bertalanffy growth equation was estimated as L(t)= 72(1-e -0.151(t+1.369)). The smallest fish was 18 cm total length and with an estimated age of 0.25 yrs; and the biggest size was 54 cm with the age of 8 yrs. The Length-weight relationship was found as W=0.0064 TL3.1268. The natural mortality of croaker was estimated 0.4604 per year.
Zahra Ghiasvand; Reza Changizi; Mahshid Shamloofar; Mitra Parsafar
Volume 6, Issue 2 , December 2017, , Pages 75-84
Abstract
Present study was conducted the effects of Allium sativum on growth, survival, body composition and salinity tolerance of (Rutilus frisii kutum). In this experiment, 4 diet (each triplicate) were supplemented with 0(control), 0.5, 1, 1.5 percent of garlic powder. The experiment carried out in 40 liters ...
Read More
Present study was conducted the effects of Allium sativum on growth, survival, body composition and salinity tolerance of (Rutilus frisii kutum). In this experiment, 4 diet (each triplicate) were supplemented with 0(control), 0.5, 1, 1.5 percent of garlic powder. The experiment carried out in 40 liters tanks. 360 Fry, initially weighing an average of 376±10.6m g, were distributed at a stocking density of 30 fish per tank and fed 4 to 6 percent body weights for 45 days. The results showed that the best performance of growth were seen in treatment 1% garlic powder (P
Mohammad Akbari; Iman Sourinejad; Ahmad Gharaei; Seyed Ali Johari; Iraj Efatpanah
Volume 5, Issue 4 , May 2017, , Pages 79-88
Abstract
Evaluation of food attractive is not summarized on growth but included the other aspects, such as body composition parameters. This study was conducted to examine the effects of Betaine in the diet on Growth performance, food efficiency and body composition of pikeperch (Sander lucioperca; Linnaeus, ...
Read More
Evaluation of food attractive is not summarized on growth but included the other aspects, such as body composition parameters. This study was conducted to examine the effects of Betaine in the diet on Growth performance, food efficiency and body composition of pikeperch (Sander lucioperca; Linnaeus, 1785) in Yosefpour's Fish farm (Siyahkal). 600 Pikeperch fingerlings were stocked in three groups of 200 in each tank and were fed with diets counting: commercial trout diet (Biomar) (Control), 1% Betaine added to biomar and 2% Betaine added to biomar, for 6 weeks and fed up to 7 meals per day. During the trial growth performance, feed efficiency and body composition were measured. The result of this study showed that final weight, specific growth rate, feed conversion ratio and feed efficiency of pikeperch in treatment 2% Betaine added to biomar were significant differences (P
Farid Firouzbakhsh; Farzaneh Vakili; Sekineh Yeganeh
Volume 6, Issue 1 , May 2017, , Pages 91-99
Abstract
The present study was performed to investigate the effects of various levels of dietary lactobacillus acidophilus as feed supplement on the growth performance, survival rate, hematological parameters and intestinal microbiota of guppy (Poecilia reticulata). For this purpose one-thousand and eight hundred ...
Read More
The present study was performed to investigate the effects of various levels of dietary lactobacillus acidophilus as feed supplement on the growth performance, survival rate, hematological parameters and intestinal microbiota of guppy (Poecilia reticulata). For this purpose one-thousand and eight hundred guppy larvae with 7 mg mean weight in a completely randomized design with 4 treatments and 3 replicates of L. acidophilus in the diet, including no bacteria (control), 1.5×107, 3×107, 6×107 CFU g-1(T2,T3,T4 respectively) were considered and fed for 16 weeks. The results showed that significant differences (P4 and control group. The highest amount of white blood cell count (9.70±0.1) was observed in 4 group and had significant different (P>0.05) with control (5.96±0.2). The highest amount of intestinal of Lactobacillus was observed in 4 group compared to other groups and control (PL. acidophilus (6×107 CFU g-1) have significant effect on growth and white blood cell count of guppy.
Farid Firouzbakhsh; Farzaneh Vakili; Sekineh Yeganeh
Volume 5, Issue 3 , March 2017, , Pages 51-59
Abstract
The present study was performed to investigate the effects of various levels of dietary lactobacillus acidophilus as feed supplement on the growth performance, survival rate, hematological parameters and intestinal microbiota of guppy (Poecilia reticulata). For this purpose one-thousand and eight hundred ...
Read More
The present study was performed to investigate the effects of various levels of dietary lactobacillus acidophilus as feed supplement on the growth performance, survival rate, hematological parameters and intestinal microbiota of guppy (Poecilia reticulata). For this purpose one-thousand and eight hundred guppy larvae with 7 mg mean weight in a completely randomized design with 4 treatments and 3 replicates of L. acidophilus in the diet, including no bacteria (control), 1.5×107, 3×107, 6×107 CFU g-1(T2,T3,T4 respectively) were considered and fed for 16 weeks. The results showed that significant differences (P4 and control group. The highest amount of white blood cell count (9.70±0.1) was observed in 4 group and had significant different (P>0.05) with control (5.96±0.2). The highest amount of intestinal of Lactobacillus was observed in 4 group compared to other groups and control (PL. acidophilus (6×107 CFU g-1) have significant effect on growth and white blood cell count of guppy.
Z Ghiavsvand; M Shamloofar
Volume 4, Issue 3 , January 2016, , Pages 61-70
Abstract
Abstract Experiment was conducted for 8 weeks to determine the reaction (Astacus leptodactylus) to interaction energy and salinity. Diets containing 3 levels of energy (300,370 and 450 kcal/100g) with a constant protein content of 30% and 2 levels of salinity (fresh water and brackish water (12 ppt) ...
Read More
Abstract Experiment was conducted for 8 weeks to determine the reaction (Astacus leptodactylus) to interaction energy and salinity. Diets containing 3 levels of energy (300,370 and 450 kcal/100g) with a constant protein content of 30% and 2 levels of salinity (fresh water and brackish water (12 ppt) were formulated. Tank content 110 liter, each filled with 80 liter water. 5 A.leptodactylus (average weight of 17±2) were storage per each tank and feed twice a day. Results showed different levels of energy did not have significant effect on growth factor and survival of crayfish (P< 0.05), but fresh water and brackish water had a significant effect on growth factor. The best growth was seen in fresh water. Survey on interaction between energy –salinity was indicated the highest growth were seen in (fresh water) and energy 370 (kcal/100g) .Caracas analyzes (protein and lipid) in treatment salinity decreased and has a significant (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 ...
Read More
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.
