ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Growth  (39)
  • Atomic and molecular processes in external fields, including interactions with strong fields and short pulses
  • Tehran, Iran  (39)
  • 2015-2019  (39)
  • 2018  (39)
Collection
Keywords
Publisher
Years
  • 2015-2019  (39)
Year
  • 2018  (39)
  • 1
    facet.materialart.
    Unknown
    A study on methanol herbal plant extract of Echinacea (Echinacea purpurea) on immunity level of Mugil cephalus (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Medicinal plants have been used in oriental medicine for centuries. Echinacea purpurea (Asteraceae), also known as the purple coneflower, is an herbal medicine with positive effects on various immune parameters that has been used customarily as a treatment for the common cold, coughs, bronchitis, upper respiratory infections, and some inflammatory conditions. The aim of this study was to investigate the effect of Echinacea purpurea (EP) extract on a non-specific immunity of Mugil cephalus. Three hundred and sixty Gray mullet larvae with average weight of 0.75 ± 0.02 g and an average length of 4.40 ±0.81cm collected from Ramin port where is located at 5 km far from the Chabahar and finally transferred to lab of trial in Offshore Research Center. This research was designed based on 4 treatment, Each with 3 replicates. The major factors examined containing growth factors mainly consists of average weight, average daily gain, protein efficiency rate, protein productive rate, hematological and biochemical factors including globin, albumin, total protein, lysozyme, ultimately, immunological factors, and respiratory burst and phagocytosis percent. In general, the results of this study showed that the addition of 100 and 200 mg of EP extract per kg of diet led to a significant increase in growth parameters (final weight, food intake, daily growth rate and efficiency of protein), hematology (RBC, WBC, Hb, Hct) and biochemical factors (total protein, albumin, globulin) in gray mullet were compared to control. The highest lysozyme activity, immunoglobulin, phagocytosis and respiratory burst was observed in treatment containing 200 mg EP extract per kg food. Treatment containing 200 mg EP extract per kg food showed a minimal mortality after challenge with bacteria photobacterium damselae compared to the control treatment. Finally, the present results suggest that diet containing 200 200 mg EP extract per kg food could improve growth, hematology, immunity and resistance against photobacteriosis of grey mullet.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Echinacea purpurea ; Mugil cephalus ; Photobacteriosis ; Growth ; Gematology ; Immunity ; Photobacterium damselae ; Medicinal ; EP
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 35pp.
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 2
    facet.materialart.
    Unknown
    Investigstion on Effect prepared vaccine by Y-ray on production rate and resistance to white spot disease in Shrimp Litopenaeus vannamei (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: White Spot Disease (WSD) is a important disease due to economic impacts in shrimp industries. Spreading of this disease in shrimp farms can caused a 100% mortality during 3-10 days. Therefore control of this disease is a strategy in shrimp industry. Vaccination is a way to control of WSD. In several years ago during a project several type vaccine of this virus by association of Atomic Energy Organization is produced that among of them the virus inactivated by GAMA radiation had better results in laboratory. To test of this vaccine in field, a research pilot was carried out. Initially 20000 shrimp napliies were obtained from one of commercial hatchery in Bushehr province, then devided to two groups vaccinated and unvaccinated. The vaccinated group also devided . 26and PL12 , group B vaccinated at PL15and PL 5to two groups, group A that vaccinated at postlarva e (PL) Rrsults showed that difference of growth performance and survival rate between vaccinated and unvaccinated without challenge with WSV after 80 days is not significantly (P〈0.05). but survival rate in vaccinated groups after challenge with WSV was significantly (P〈0.05) further the unvaccinated group. Also the results showed survival rate of group B after challenge with WSV is better than group A and this difference was significantly (P〈0.05). this study showed vaccination of shrimp postlarvae with GAMA radiation vaccine can control of shrimp mortality in incidence of WSD in farms.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Litopenaeus vannamei ; WSSV ; Gamma radiation ; Vaccination ; Y-ray ; White spot disease ; Shrimp ; Nauplii ; Growth ; Survival rate ; Mortality
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 65pp.
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 3
    facet.materialart.
    Unknown
    Several fish species carp culture with Chinese black carp to increase diversity in warm water fish farms (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The objective of this study was to investigate the effects of black carp introduction in chines carp poly culture as well as its effect on the growth, survival rate and production of chines carp species. This study conducted in two consecutive year. The period of culture in first year was during Jun 1 until Des 5 ,2009 and in second year it was from Jun 4 to Dec, 1,2010 .The experiment were started by selecting 9 earth end pond each with 800 m2 area and was performed in triplicate with 2 treatment and one control , each year .The ponds were treated by liming and fertilizer before filling water and then stocked with 3000 chines carp ( 140 Silver carp , 42 Grass carp , 42 Common carp and 25 Bighead carp ) while the number of Black carp in treatments 1, 2, 3 and 4, respectively, 250, 500, 75 and 125 pieces in Ha, blackcap was added to the control species respectively . The number of fish species harvested at end of culture in treatment 1, 2 and control .The total fish species harvested at the end of first year was 2276 out 1904 species released. The number of fishes catch in treatment 1,2 and control were 637,658and 573 species. the statistical analysis showed that average weight of black carp were 407±150 gr in treatment 1, 234±121gr in treatment 2 with the minimum and maximum weight of 242 and 780 gr in first treatment as well as 110 and 750 gr in second treatment the production of black carp in first treatment were 42 kilogram per hectare and 60 kilogram in second treatment. The growth rate were higher in second treatment than first one. In second year the investigation repeated in triplicate with treatment3, 4 and one control .The total stocking density in treatment 3,4 and control were 665,633, and 574 pieces. Statistical analysis showed that total weight of black carp in third treatment was2049 ±614gr and in forth treatment was 2361 ±60 gr where the minimum and maximum values were 3115 gr and 1025 gr respectively. The survival rat of black carp in treatment3 higher than in were treatment 4 while the growth in treatment 4 was higher treatment3.The total production of black carp in treatment 3 and 4 were 123 and 181kilogram per hectare respectively. The ANOVA test conducted for grass carp revealed that treatment 4 is significantly difference with treatment 3 and control. While for silver carp the treatment 4 is significantly difference with treatment 1 and control while for Big head carp the treatment 4 was significantly difference with control at 5% level (P〈 %5) .On second year the black carp reached to acceptable market size which could be compatible with other carp such as common carp and grass carp comparative analysis between different stocking density indicate that the stocking density with 125 pieces showed the highest positive effects.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Fish ; Species ; Carp culture ; Chinese black carp ; Diversity ; Warm water ; Growth ; Survival rate ; Silver Carp ; Grass carp ; Common carp ; Bighead carp ; ANOVA
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 111pp.
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 4
    facet.materialart.
    Unknown
    The study of possible biotechniques and normative to production some species of Anostraca (Phallocryptus spinosa) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: This project was carried out in order to determine the hatching conditions and laboratory culture methods of Fairy Shrimps ( Phallocryptus spinosa). Physico- chemical factors and phytoplankton of natural habitat of this organism was investigated in Khasellou region around Azarshahr – East Azarbaijan province. The results showed that occurance and growth of fairy shrimps in their habitates were beginning from early Aprill and their survival was decreased with increasing temperature, precipitation and increasing the salinity of their culture medium. Then they disappeared. Their habitat phytoplankton contained 3 phylla and 10 genera, from which green algae enjoyed the greatest density in May. The pool salinity was around 20-17 g/l , when metanauplii was observed in early spring. In the pool containing and without fairy shrimps the oxygen concenteration was high (9 mg/l) and low (2.9 mg/l ) , respectively . In 9 prawn ornamental fish genera, feeding with fairy shrimp showed a significant higher fecundity and hatching percentage compaired to manual diets (cow liver, spinach). In all groups fed with fairy shrimp the duration of spawning time were reduced from 15 to 8-10 days and the color was enhanced. The means of cyst number per captured female also, cyst , decapsulated cyst and Naupilli diameters were mesured 142.9±19.0 cysts , 273.2 ± 4.9 µ , 242.4± 3.8 µ and 542.6 ± 27.0 µ., respectively . The hatching rate was increased by reducing temperature and salinity of their culture mediums from 25 to 15 ◦ C , and 28 to 18 g/l, respectively.The highest hatching was observed on 5 th day at 15 ◦ C and 18 g/l (5, 33 %). In addition, low but multiple hatching was observed. Therefore , water temperature and salinity affected hatching rate in this species.The hatching success of Phallocryptus spinosa cysts was beter when collecting cysts together with dry sediments of their habitat without separation sensetive cysts . In addition to cold keeping and freezing, the hydration – dehydration method caused more diapause deactivation for hatching induction. The laboratory results revealed that the survival of fairy shrimps were highest at 15 ◦ C (42%) and lowest at 25◦ C (26%), respectively. Also, their life was inhibited in 30◦ C.In different salinities, the mean survival rate were 26% (Salinity = 15 g/l) and 20% (Salinity = 25 g/l), respectively. The mean survival percentage of Phallocryptus spinosa cultured in natural habitat water (64.3%) was higher than aerated tap water (23, 3 %). Also, feeding with Nanochlorepsis caused higher survival rates. On the other hand, Beakers yeast caused higher mortality rates. Therefore , regarding to relatively high sensitivity of these species to physico – chemical and nutritional conditions of their culture medium, it is better to culture these species with expantion of their natural habitat in order to preserve their biodiversity , culture and increase stocking density with regard to environmental considerations .
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Physico-chemical ; Environmental ; Fairy Shrimps ; Phallocryptus spinosa ; Hatching ; Culture ; Biotechnique ; Species ; Anostraca ; Phytoplankton ; Growth ; Temperature ; Salinity ; Phylla ; Feeding ; Survival rate ; Mortality ; Biodiversity
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 104pp.
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 5
    facet.materialart.
    Unknown
    Bacteria effects (probiotics) on growth and survival rate and resistance of shrimp during propagation stages (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: This project investigates bacteria effects as probiotics on growth and survival rate and resistance of shrimp during propagation stages. Bacterial flora were extracted from seawater , water of cultured farms , shrimp cultured and sludge from private propagation farms different bacteria such as Vibrio alginolyticus(serotype1-4) Vibrio splendidus I , Vibrio fluvialis ,Vibrio anguillarum ,Vibrio costicul, Vibrio vulnificus,Vibrio nereis,Vibrio camplbelli,Vibrio natriegens,Vibrio proteolyticus, Vibrio plegius ,Vibrio fischeri,Aeromonas hydrophila, Aeromonas schuberti,Aeromonas salmonisida, Aeromonas veronii , Pseudomonas pseudoalcaligenes, Pseudomonas chloraphis, Alcaligenes faecalis, Bacillus megaterium, Bacillus pumilus, Bacillus circulans, Bacillus cereus, Bacillus subtilis, Bacillus licheniformis, Lactobacillus case, Lactobacillus bulgaricus, Lactobacillus delbrukii, Lactobacillus fermentum, Lactobacillus leichmanii, Lactobacillus plantarum, Lactobacillus rhamnosus, Lactobacillus acidophilus, Lactobacillus lactis, Pediococcus acidilactici were isolated , identified and lyophilized.These bacteria in different experiments were used on shrimp life cycle stages and live food such as Chaetoceros , Skeletonema and Tetraselmis algae. Some serotypes of one bacterial species showed various reactions in media and experiment probiotics. Vibrio alginolyticus(serotype1) with 107 cells/ml can increase Tetraselmis sp production during 6 days to 71% compared to the control experiment without bacteria. Also Vibrio alginolyticus(serotype4) with 105 cells/ml can increase Tetraselmis spp production during 6 days to 389% more than control. Vibrio splendidus could increase 23% shrimp fork length in postlarvae 3 compared control. Vibrio alginolyticus+ Vibrio fischeri can increase survival , fork lenght and body weight of green tiger shrimp postlarvae significantly(P〈.05).
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Bacteria ; Shrimp ; Algae ; Probiotic ; Vibrio alginolyticus ; Vibrio splendidus ; Vibrio fluvialis ; Vibrio anguillarum ; Vibrio costicul ; Growth ; Survival rate ; Resistance
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 85pp.
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 6
    facet.materialart.
    Unknown
    Stock Assessment of Zobaidy, Pampus argenteus, in the North of Persian Gulf (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The project “Stock Assessment of Zobaidy, Pampus argenteus, in the North of Persian Gulf” started in April 2003 and completed by the end of April 2006 as a cooperative research project to assess the valuable stock of zobaidy shared between Kuwait and Iran in the North of Persian Gulf. The main objectives were to investigate and determine the basic biological parameters, the standing biomass, seasonal abundance, and the impact of regional fishery activities. These studies are necessary to recommend practical management policies and measures for long-term sustainability of the zobaidy stock. The sampling of fisheries data (catch, effort, fish length distributions, and biological data) was started in May 2003 and ended December 2006. Monthly length frequencies data were collected from both the drift gill net and shrimp trawl fisheries. Age determination was based on otolith sectioning, polishing, etching, and staining method. The age groups ranged from 0 to 10 yrs but the dominant age groups were 1-3 years and the estimated parameters for both sexes were L∞ = 32.0-36.0 cm FL and K = 0.26-0.30 yr-1, females grow faster than males. Sea survey on board of two dhow boats was carried out using swept area method. Higher abundance was always obtained in Kuwait Bay rather than the other areas surveyed in Kuwait and Khuzestan waters. The total estimated stock biomass in the surveyed areas varied from 42 t in January 2004 to 2,633 t in November 2004, while the Iranian biomass varied from as low as 19 t in October 2005 to 295 t in November 2003. The data indicated that Ras Al-Gaid, Bubiyan Island is the main nursery area in Kuwait waters, while Lifah, Busaif, and Bahrakan are important nursery areas in the Khuzestan waters. Kuwait Bay and Khor Musa are considered important spawning grounds and should be protected. Yield per recruit analysis showed that higher yield could be gained with increasing fish effort, which is not recommended under the present status of high exploitation rate. In contrast, virtual population analysis indicated that future catches will reduce if the fishery continues with present level fishing effort. A reduction of 50% would be required to maintain the present level of catches as well as to enhance the stock biomass. Formulation of a joint advisory management committee would be advisable approach to manage and monitor the zobaidy stock in the region. This will need commitment from the three countries in the region for data collection on regular basis on length frequency, statistics, and biological data. Copepods with high occurence of 64% - 88% is considered as the main item in the Pomfret fish, while jelly fish and other decapods crustaceans are considered as minor items. Observation of pre- flexion stage larvae of pampus genus among the specimens collected from Khuzestan coast water could be considered as an evidence for the spawning of this fish in this region. The occurrence of pampus larvae in Khuzestan coast during the months of June to October has been reported for several times. Examination of 101 specimens (38 from Kuwait, 63 from Iran) for molecular survey does not show any significant differences between Kuwait and Iran water stocks for this fish, so it is possible to hypothesize a unit population for zobidy stock in Persian Gulf and Oman Sea as whole.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Biological ; Pampus argenteus ; Zobaidy ; Stock assessment ; Growth ; Food ; Molecular study ; Biomass ; Fishery ; Sampling ; Survey ; Population
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 146pp.
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 7
    facet.materialart.
    Unknown
    Study and evaluation of economical and hygienic effects of aflatoxin B1 in cultured Huso huso (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: In the present study, the impacts of various concentrations of Aflatoxin B1 (AFB1) on Beluga, Huso huso, under controlled conditions were investigated. Belugas (120±10 g) were fed diets containing 0, 25, 50, 75, and 100 ppb AFB1/kg of diet for 3 months. Results showed that various levels of AFB1 do not significantly affect the specific growth ratio (SGR) (p〈 0.05) of fish in different treatments. However, weight gain and food conversion ratio (FCR) varied significantly (p〈 0.05 between control and treatments with diets contaminated with 75 and 100ppb AFB1/kg after 90 days). The increase in level of AFB1 did not affect the percent of survival rate (SR) and no mortality was observed in treatments (SR=100%). Various levels of AFB1 under experimental conditions of the present study affect some growth factors, such as, weight gain and FCR but have no significant impact on SGR. Histopathological studies showed that different level of AFB1 can cause broad range of changes in liver, kidney, spleen and gills tissues, particularly at concentration of 75 and 100 ppb AFB1/kg of diets after 60 days. No tumor formation observed. With regard to toxin concentration and time of exposure to AFB1 in experimental fish, different degree of skin lesions (simple hemorrhage to progressive wounds) were observed in different parts of body especially in vent, caudal peduncle, fins, and head. "Yellow sores" on head and trunk regions are considerable and led to deterioration of appearance. Prevalence of skin lesion in different treatments was 8 -53.3 %, which after stop feeding with toxic diets, 16-24 % healing observed. Haematological changes included chronic anemia and lymphocyteopenia. Also neutrophilia observed with increasing of skin lesions. Meat accumulation of AFB1 in different treatments is not so considerable and harmful for human consumption, but is significantly different with control fishes (P〈0.01).
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Economical ; Huso huso ; AFB1 ; Growth ; Skin lesions ; Pathological changes ; Haematological changes ; Meat residue ; Aflatoxin ; Beluga ; Liver ; Kidney ; Gills ; Evaluation
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 116pp.
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 8
    facet.materialart.
    Unknown
    The survey on growth and survival larvae of different generation of Litopenaeus vannameiu (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: In the present Shrimp industry Has become a huge industry . The shrimp culture in Bushehr province began with Penaeus semisulcatus and Fenneropenaeus indicus and with introducing Litopenaeus vannamei in Iran Was known as a culture species.The shrimp production rate in IRAN is about 23000 metric ton. Outbreak of Various diseases and Biosecurity are most important things to produce Specific Patogen Free(SPF) shrimp.In this regard, production of SPF shrimp is The main requirements of shrimp industry.The survey on growth and srvival larve of different generation of Litopenaeus vannamei project was carried out in 2013 and 2014.Broodstock selecting ,propagation, culture and shrimp generation Was performed in 2012 until 2014.In 2014 we produced 4300 pieces of prebroodstock with 22.38 gram and 86 percent survival rate after 120 days of culture.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Litopenaeus vannmei ; Specific Patogen Free ; SPF ; Cultue ; Shrimp culture ; Penaeus semisulcatus ; Fenneropenaeus indicus ; Survey ; Growth ; Survival ; Larvae
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 40pp.
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 9
    facet.materialart.
    Unknown
    Effect of nutritive microalgae on growth and survival rates, nutrition value and reproduction performance of Artemia urmiana (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Artemia is the most widespread live food used in the production of different stages in many aquaculture organisms. It is a non-selective filter feeding organism. Generally, microalgae are the most favorable feeds for Artemia, particularly when the algal species have suitable size, digestibility and nutrient values. This study was performed to compare the efficiency of three microalgae namely Dunaliella tertiolecta, Tetraselmis suecica, Nannochloropsis oculata , Chlorella sp., Cheatocerus sp., Spirolina sp. and Isochrices sp. on the growth, survival and reproduction efficacy in Artemia urmiana in laboratory conditions. Artemia cysts were harvested from Urmia Lake and hatched according to the standard method. Live microalgae were cultured using the Walne and F/2 Guillard's culture mediums. Artemia survival was determined in treatments on days 8, 11, 14, 17 and 20. Length growth of A. urmiana was measured by Motic SMZ- 168 stereomicroscope equipped by Motic MLC- 150c apparatus and related software in three-day intervals. To determine reproduction efficiency characteristics such as cysts and nauplious production, intervals between two successive reproductions, first reproduction time and the date of female Artemia were analyzed. Statistics analysis was performed by one-way variance (ANOVA) and Duncan test in SPSS 18 software.The results indicated a significant difference (p 〈 0.01) among three microalgae in terms of length growth, survival rates and reproduction characteristics in A.urmiana. On the other hand, there was a direct relationship between Artemia length growth and reproductive characteristics. In general, this study showed that survival rate, length growth and reproductive characteristics of A.urmiana fed by Dunaliella tertiolecta were significantly higher than A.urmiana fed by other microalgae.Therefore, it seems that Artemia culture in salt water with Dunaliella as natural flora is a suitable choice.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Artemia urmiana ; Microalgae ; Length ; Growth ; Survival ; Nutrition ; Aquaculture ; Dunaliella tertiolecta ; Tetraselmis suecica ; Nannochloropsis oculata ; Chlorella sp. ; Cheatocerus sp. ; Spirolina sp. ; Isochrices sp. ; ANOVA
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 59pp.
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 10
    facet.materialart.
    Unknown
    Growth performance and age composition of Salmo trutta caspius in Iranian part of Caspian Sea (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The aim of this project is to study the growth and age structure in the Caspian trout, comparison with other coldwater species and check the trend of these parameters in recent years. This study was conducted during 2013 till 2015. Totally, 43 specimens for back calculation and 101 specimens for biometrical study of the Caspian trout have been caught in two month period. Biometric parameters such as length, weight and age of the fish were recorded. Base on Back calculation method in 1393, the average length of fish at ages 1, 2 and 3 years old were 18.98 ± 3.5, 30.5 ± 7.24 and 41.7 ± 9.1 cm. So these age groups are under the adult age and don’t approaching to near the beach and rivers for spawning behavior. Therefore, these length groups cannot be observed in catch composition. The result showed, the mean of gonad weight in this fish was about 11 percent of total weight and number of eggs per gram of gonad calculated about 10.8 numbers. Minimum age and maximum age of this species determined 4 years and 7 years (mean = 5.6) and the most frequency allocated to 5 age group and the frequency of 6 and 7 years has been remarkable. The average length of salmon was 69.2 ± 6.2 cm (minimum 57 and maximum 81 cm) and the average weight was measured 3323 ± 677 g (2400 to 5600 g) in the catch composition. Growth parameters such as k, L∞ and ø’ was measured 0.18, 104 cm and 3.289 respectively. The amount of b for relation length and weight was 2.9 which imply negative allometry. L∞ and growth coefficient (K) on the Caspian trout were acceptable range, that it shows good growth the fish in the sea water. Most of the fishes were catched from Cheshmehkileh River. As at present Shilat uses just the broods of the Tonekaboon region for restocking of this species, we recommend using the broods of the western region separately for rehabilitation of the stocks of this region.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Caspian trout ; Salmo trutta caspius ; Age ; Growth ; Growth performance ; Composition
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 46pp.
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...