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
  • Female
  • Humans
  • 2020-2022  (32)
Collection
Keywords
Publisher
Years
Year
  • 1
    facet.materialart.
    Unknown
    Observation on the sex ratio, fecundity, egg size and gonadosomatic index of grey mullet (Mugil cephalus) from high brackish tropical lagoon (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24627 | 19325 | 2018-05-22 06:26:49 | 24627 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The 2661 specimens of the striped mullet, Mugil cephalus L. used for this study, were collected from high brackish lagoon in southwest Nigeria for 24 months. The size of the 2661 specimens of M. cephalus used for this study ranged from 1.7- 29.5cm standard length (total lenght 1.9 to 39.0cm). The sex ratio for M. cephalus was 1:0.53 and this showed a statistically significant (p〈0.05) dominance of the male over the females for the size range. The fecundity estimates varied from 635,568- 1,520,185 and was positively correlated to the fish and weight. Oocyte diameter averaged 409.64 ~c 40.67pm and this is indicative of an early stage of gonad maturation of the specimens in the lagoon before final spawning occurred. The GSI indicated that spawning activity occurred from December to May in the open ocean.
    Description: Includes: 28 references.
    Keywords: Ecology ; Fisheries ; Mugil cephalus ; ASE ; Nigeria ; Lagos Lagoon ; Mature ; Spawning ; Specimen ; Male ; Female ; brackishwater environment ; automation
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 241-246
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 2
    facet.materialart.
    Unknown
    Study on propagation and breeding of Hamoun fish (shizothoraxzarudnyi) to one gram weight in earthen pond (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25322 | 18721 | 2018-09-12 09:50:04 | 25322 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Hamoun fish, Schizothorax zarudnyi, is an indigenous species of the eastern waters of Iran, which is exclusively found in this region. However recently drought occurrence in the Chahnimeh reservoirs (a semi natural water body) making them vulnerable to extinction. As an appropriate action to address this problem and according to the 3 side contract between Italian Government – UNDP - Islamic republic of Iran Government and the Italian government financial support to reduce poverty in the Province of Sistan-Baluchestan through the reinforcement and dissemination of aquaculture activities the project was developed at the Hamoun Research Unit by the Chahbahar Fisheries Research Center to record the breeding normative of 1 g weight larvae for restocking and other researching purposes. 331 broodstocks of the indigenous species Shizothorax zarudnyi weighing 800-2450 g were collected from the Chahnimeh reservoirs in early autumn, 2006. From 5/3/2007 (the project is supported and communicated on 2010) , Ovulation was stimulated with three stimulators; pituitary extract (3-6 mg kg-1 body weight), GnRH-A (20-30 mg kg-1 body weight) and anti dopamine (10-15 mg kg-1 body weight) that was given in 2-3 doses to breeders. Of 169 injected breeders , some were injected On mid March of 2007 (12-13 ºC water temperature) responded to the injection 25% ,while the rest were injected On April of 2008 (14-16 ºC water temperature) responded to the injection 65%. In the present project of 167 breeders 82 were female and 87 male. Totally 30 female breeders released their eggs in different stages. 20 female breeders released their eggs completely, 3 breeders released half of their eggs and 7 released 1/3 of their eggs. The male breeders just injected in the final dose of hormontrapy and all were ready for releasing sperms however the ovulation in female breeders occurs between 353-428 h ºC and after the final dose of injection. Ripe eggs were stripped from the females and fertilization was done by the dry method. Fertilized eggs were transferred to veis incubators and troughs. Incubation period for eggs differs and larvae hatch out after about 910 days at an average water temperature of 12.5 °C. Maintained at 13-14 °C, complete absorption of yolk sac in Shizothorax zarudnyi larvae occurred after 5-8 days. Larvae were fed with a mixture of powdered milk and egg yolk in this stage followed by decapsulated Artemia cysts and nauplii of Artemia and then on formulated starter diets used for carps. Because the ponds were not ready, larvae were maintained in troughs for about ten days before they were transferred to two 1200 m2 earthen ponds where they reached a body weight of about 1 g. They were then handed over to the Iranian Fisheries department in the region. Larvae were fed with the starter feed SFCO in the earthen ponds. About 350 thousand larvae were stocked in two earthen ponds. Based on the results of present study and other studies we may conclude that artificial breeding in Schizothorax can be successfully achieved at 14-16 ºC in flow through systems using hormone therapy (combination of GnRha and anti dopamine) and larvae could be easily cultured in earthen ponds. However this species exhibits lower growth rates as compared to carps its high expenses could have an important role in economical feasible.
    Keywords: Aquaculture ; Iran ; Sistan and Baluchestan province ; Chahnimeh reservoirs ; Chahbahar ; Hamoun fish ; Schizothorax zarudnyi ; Breeding ; Species ; Aquaculture ; Temperature ; Female ; Eggs ; Hormontrapy ; Sperm ; Ovulation ; Larvae ; Fisheries ; Earthen ponds
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 71
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 3
    facet.materialart.
    Unknown
    Investigation of production possibility of monosex female and sterile fish in rainbow trout Oncorhynchus mykiss (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25147 | 18721 | 2018-08-26 16:54:41 | 25147 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: This investigation carried out for the first time in Iran inorder to prodcution of monosex female and also sterilization in Rainbow trout. In this study, the eggs of general females were fertilized with the sperm of sex reversed male and so monosex female population was produced in second generation and sterilization carried out with oral administration of 17α methy 1 testosterone and immenrsion and oral administiration methods were used in embryonic stage and from commencing of acitve feeding of larvae, respectiverly. For sex reversal , 13 treatments were considered totally, that the most percentage of male (100%) was observedc in a treatment including of orally administration of 0.5 ppm hormone for 60 days after commencing active feeding (P〈0.001). In the other treamtnet, different percentages of sex ratio including male, female, intersex and sterility were observed. The offspring of genral eggs fertilization with the sperm of masculinized fish were 100% female, chisquare test was shown the treatment of orally administration of 30 ppm hormone for 120 days after commencing active feeding that had been considered for sterilization, was produced 90% sterile fish (P〈0.001) and was changed the sex ratio significancthy. Morphological changes of the gonads and sperm ducts in matured fish and also histological changes in the gonads of fish in the treamtints were considerable.
    Keywords: Biology ; Iran ; Monosex ; Female ; Male ; Sterilization ; Rainbow trout ; Eggs ; Fertilized ; Sperm ; Population ; Sex ; Fish ; Oncorhynchus mykiss ; Rainbow trout
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 58
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 4
    facet.materialart.
    Unknown
    Bester (beluga ♀ × starlet ♂) production and comparing their growth with beluga in Iran (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25193 | 18721 | 2018-09-03 17:21:38 | 25193 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Aquaculture for human consuming species is being considered as the first substitution of catching aquatic species due to increase of human population and decrease of wild aquatic stocks. In this study, the hybrid sturgeon Bester (female beluga x male sterlet) was produced for the first time in Iran. Sperm of 1.35 kg male Acipenser ruthenus was used to fertilize the eggs of 125 kg female Huso huso in Shahid Marjani Sturgeon propagation center (Agh Ghala, Golestan province). The fries of bester and control treatment of beluga were transported to International Sturgeon Research Institute (Rasht) after about one month by reaching to 490 mg and 377 mg of weight respectively. All fishes fed by artificial concentrated food (48-50% protein and 15-17% fat) after a period of feeding with Artemia and Daphnia. Sorting was carried out according to increase of fish weight for both fishes. Results showed that the imported sterlet spawners were not at the high maturation stages and especially the males had not suitable sperm quality. It showed that up to 2 months of age , these was no significant difference between bester and beluga weight but from this age up to 2 months of age the weight of beluga was greater. Meanwhile from 2 months old up to the end of the study (21 months) the weight of bester sample was significantly greater than beluga. The comparison of FCR for the whole rearing period showed no difference between bester and beluga (2.4 and 2.3 respectively). In general, the increase and decrease pattern of GR and SGR were coincided to each other, but showed monthly differences. Growth rate (GR) and specific growth rate (SGR) of bester were greater than beluga from 4th and 3rd month of rearing period respectively.
    Keywords: Aquaculture ; Iran ; Golestan Province ; Aquaculture ; Beluga ; Sterlet ; Bester ; Growth Rate ; Aquatic ; Species ; Population ; Female ; Male ; Acipenser ruthenus ; Huso huso ; Sturgeon ; Artemia
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 55
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 5
    facet.materialart.
    Unknown
    Histologic study of ovarian changes during the reproductive cycle of female yellow fin sea bream, Acanthopagrus latus (2021)
    In:  http://aquaticcommons.org/id/eprint/25960 | 18721 | 2018-11-20 12:36:29 | 25960 | Khorramshahr University of Marine Science and Technology
    Details
    Publication Date: 2021-07-24
    Description: This study was done to investigate the macroscopic and microscopic structure of the ovary of Acanthopagrus latus and their changes during sexual maturation cycle from October 2011 to may 2011. 80 A. latus from Mussa Greek (North West of Persian Gulf) were captured and transferred to the laboratory. After biometry, gonads were removed, were weighted and fixed in Bouin's Fluid. Samples were dehydrated, clarified, embedded and sections were prepared. After staining with H&E these slides were studied under light microscopy. Gonadosomatic indices, macroscopic and microscopic changes in the ovary during different months were recorded. The minimum value of GSI were measured in May, (0.31 ± 0.01) while its maximum was seen in March (9.9 ± 3.1). Cyclic changes in ovarian maturity were divided into six stages, including immature, premature, mature, ripe, spawning and resting. A. latus had asynchronous spawning that was occurred from February up to March.
    Keywords: Aquaculture ; Biology ; Iran ; Histologic ; Female ; Yellowfin Seabream ; Acanthopagrus latus ; Ovarian
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 57-65
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 6
    facet.materialart.
    Unknown
    Effects of endocrine disruption by 4-nonylphenol ethoxylate on the growth performance and immune response of female and male immature koi carp (Cyprinus carpio carpio) (2021)
    In:  http://aquaticcommons.org/id/eprint/26001 | 18721 | 2018-10-19 18:22:44 | 26001 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-24
    Description: Nonylphenol (NP) is an endocrine disrupting chemical which has been shown to be able tomodulate endocrine system of various organisms by different mechanisms. The objective of this study was to investigate the potential effects of 4-NP and 17-β - estradiol (E2) on the immune parameters (IgM levels and lysozyme activity) of the teleost Koi carp (Cyprinus carpio carpio) for a better understanding of the immunereproductive system interactions. The experimental fishes were injected with ascending doses (10, 50,100 μgg^-1 body weight) of 4- nonylphenol (4-NP) and (2 μgg^-1 body mass) of 17-β-estradiol (E2) or vehicle during 3 weeks. After 21 days, the fishes (180) were anesthetizedand their blood samples were collected from caudal vein, and then they were dissected and sexually separated by gonad characters. The measurement of immune parameters in plasma showed that 4-NP induced significant increase in the IgM levels and lysozyme activity at dose of 50 μgg^-1 while the levels of these parameters in the higher doses (100 μgg^-1) decreased compared with the control group (p〈0.05). In addition the treatment, with 2 μgg^-1 E2 significantly decreased both the IgM levels and lysozyme activity after 21 days of injection. These results indicated that 4-NP and E2 could lead to disturb the balance of immune system with potential consequences for immature koi carp.
    Keywords: Biology ; Pollution ; Iran ; 4-nonylphenol ; 17-β-estradiol ; Immune-reproductivesystem ; Immunoglobulin IgM ; Lysozyme ; Koi carp ; Cyprinus carpio carpio ; Disruption ; Growth performance ; Female ; Male
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 725-744
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 7
    facet.materialart.
    Unknown
    Broodstock management, reproduction, cryopreservation in salmonid, genetic management and selective breeding in responsible aquaculture (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25651 | 18721 | 2018-10-14 02:48:20 | 25651 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: This study was conducted to codify the guideline and indexes of broodstock management in salmonid fish and cryopreservation, selective breeding and sex reversal in hatchery to attain responsible aquaculture development. Cryopreservation includes of sperm and egg in term of economic is important in aquaculture. In this report mentioned the type and name of material. All female and sex reversal fish are produced by steroid hormone which mentioned in this report. Selective breeding include individual selection and family selection which could be used for genetic improvement of fish.
    Keywords: Aquaculture ; Biology ; Management ; Iran ; Broodstock ; Reproduction ; Cryopreservation ; Genetic ; Breeding ; Aquaculture ; Salmonid fish ; Sex reversal ; Hatchery ; Sperm ; Egg ; Female ; Steroid hormones
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 46
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 8
    facet.materialart.
    Unknown
    A survey on plankto an investigation on ecology of mudskippers in Hormuzgan coastal areas communities in Bandar Abbas coastal area (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25836 | 18721 | 2018-10-13 10:31:51 | 25836 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: The most important habitats of mudskippers are muddy areas in tidal zone of tropical mangrove forests. Mudskippers are related to Oxudercinae subfamily of Gobiid fishes. Three most distributed species of Hormozgan mudskippers were Periophthalmus waltoni, Boleophthalmus dussumieri and Scartelaos tenuis. These fishes can be considered as euryhaline and eurythermal aquatic species, because they can tolerate a wide range of salinity and temperature. A research was done since september 2008 to september 2009 in two important mangrove regions of Hormuzgan (Tyab and Khamir) to determine some ecological characteristics of inhabited mudskipper species. Results showed that nitrate levels are significantly different between tidal lines and seasons (P〈0.05). Maximum nitrite concentrations were recorded 53.2 and 92.5 µg/l in Khamir and Tyab respectively. The annual correlation matrix showed that a positive correlation between phosphate concentration and nitrite and silicate (P〈0.05). Silicate concentration was very high, because of too low density of diatoms and radiolarians. Some species of diatoms, dinoflagellates, cyanobacteria and larvae of crustacea and echinoderms were observed with different density and diversity. Sediment composition of the studied areas were categorized in three classes (clay, sand and clay - sand). Polychaetes formed dominant group of benthic fauna in Tyab and Khamir areas. High density of capitellid worms was possibly related to some environmntal stress caused by activity of fishing and cargo vessels. It was not observed significant difference between fishes length in two areas (P〈0.05); Mean lengths of P. waltoni, B. dussumieri and S. tenuis were calculated 9.85, 14.7 and 11.5 cm respectively. Spawning period of each three species in both areas were obtained from late winter to late spring based on gonadosomatic index values. Male to female sex ratio of P. waltoni, B. dussumieri and S. tenuis were calculated 1:0.45, 1:0.41and 1:0.74 respectively. Absolute fecundity of P. waltoni, B. dussumieri and S. tenuis were estimated 3558 ± 2202, 3952 ± 1030 and 6742 ± 1939 respectively. P. waltoni feeds mainly on fiddler crab, S. tenuis uses crustaceans and gastropods and B. dussumieri has a vegetarian diet.
    Keywords: Ecology ; Iran ; Persian Gulf ; Hormozgan Province ; Mudskippers ; Ecology ; Periophthalmus waltoni ; Boleophthalmus dussumieri ; Scartelaos tenuis ; Female ; Male ; Benthic fauna
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 97
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 9
    facet.materialart.
    Unknown
    A study on fishing status and some reproductive characteristics of Klunzinger’s mullet (Lize klunzingeri) in coastal waters of Khuzestan province (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25845 | 18721 | 2018-10-13 08:35:24 | 25845 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Biological characteristics of Liza klunzingeri were studied in two coastal areas, Sajaphi and Bahrekan, of eastern Khuzestan during March to February 2007. Among total 1880 measured fish specimens, 947 specimens were analyzed. The mean value of Gonado-somatic Index (GSI) for the male and female fish were calculated as 0.96± 1.39 and 3.25 ± 3.26 respectively. The GSI value was highest in November and lowest in July. The mean value of condition factor (K) was 1.25± 0.14 in male and 1.21± 0.15 for female. The highest K value were observed in June and the lowest value in February. The lenght at first maturity regardless of sexuality, was found to be 14.5 cm and the time of spawning based on reproduction pattern were determined in Nov- Dec. The length-weight relationship were calculated as Y=0.024L^2.76 (n=226R2=0.72) for males, Y=0.011L^3.00 (n=444R2= 0.78) for females and Y=0.0208L^2.82 (n=670R2 =0.82) for total fishes and also it’s found significant in level length weight relationship in (P〈0.05). According to biological characteristics and referring to American fisheries society (AFS) indices and Fuzzy logic expert system, Lize klunzingeri is classified as low vulnerable species.
    Keywords: Biology ; Iran ; Khuzestan province ; Sajaphi ; Bahrekan ; Lize klunzinger ; Gonado-somatic Index ; GSI ; Condition factor ; Biological characteristics ; Female ; Male ; Specimens ; Fisheries
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 39
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 10
    facet.materialart.
    Unknown
    A biological investigation into anchovy kilka (Clupeonella engrauliformis) in Anzali fishing ground, in 1993 (2021)
    In:  http://aquaticcommons.org/id/eprint/23897 | 18721 | 2018-08-01 14:07:33 | 23897 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: In the recent years the Kilka fishing in Iranian coastal waters boosted rapidly. The rich stock of Kilka has provided the possibility of apt exploitation. Among the three Kilka species, dwelling in the Caspian Sea, 90% of Iran's catch consists of Clupeonella engrauliformis. Analyses of Data show that the sex ratio varies widely with the change of season. In autumn the spawning reaches to the peak and the female population declines in catching. The oil fat content and intensity of feeding in both sexes did not reveal significant differences. Average size range is 194.91mm in summer und 97.97mm in winter. Length frequency in both sexes varies from 100 to 110mm, but the female size range changes are wider. Mean weight of Anchovy Kilka is 7.84g in spring and 5.92g in winter. The research also shows that in winter large size Kilka are distributed at the deepest area of the sea. Therefore, it is suggested that to catch the Kilka, fishing operation should be done at deeper depth.
    Keywords: Biology ; Fisheries ; Biological Investigation ; Anchovy Kilka ; Clupeonella engrauliformis ; Fishing ; Species ; Dwelling ; Clupeonella engrauliformis ; Sex ratio ; Female ; Oil fat ; Intensity ; Feeding ; Size ; Length ; Depth ; Anzali ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 31-42
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 11
    facet.materialart.
    Unknown
    On some biological aspects of Acipenser stellatus in the south west of the Caspian Sea in 1994 (2021)
    In:  http://aquaticcommons.org/id/eprint/23906 | 18721 | 2018-08-01 16:06:14 | 23906 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: During the fishing season, the statistical study on biological observation was carried out in four fishing stations located in the south west of the Caspian Sea. During the research activity 2806 stellate sturgeon were sampled. The result revealed that the ratio of stellate eggs weight used in processing of caviar were 20.7% of the total weight of the body. The number of females were more than males in the catch (77.8%). In 1991 the average length of females was 134.1 cm and the average weight with internal organs was 11.86 kg. But the mean length and weight in 1993 were 120.5 cm and 11.6 kg. The average age for female and male were estimated 12 and 10 years old respectively. Among the samples 92.7% of females were in the fourth stage of maturity and 60.4% of males were in third stage of maturity. In spite of the fact that during 1984-1991 fishing effort for catching Acipenser had been increased, yielding caviar had been decreased. This state was continued until 1994. So it was revealed that increasing fishing efforts wasn't led to increase the exploitation of Acipenser stocks.
    Keywords: Biology ; Female ; Male ; Caviar ; Weight ; Body ; Biological ; Fishing ; Eggs ; Acipenser stellatus ; SW Caspian Sea ; Caspian Sea ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 49-64
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 12
    facet.materialart.
    Unknown
    Length-length and Length-weight relationships in Astacus leptodactylus in Bandar Anzali region (2021)
    In:  http://aquaticcommons.org/id/eprint/23910 | 18721 | 2018-08-01 16:20:57 | 23910 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: Different length - weight relationship in 1000 male and 201 female of freshwater crayfish were studied and it was revealed that the length - length relationship is best described through linear regression, while weight - length relation is best described through a multimodel one. The "r" coefficient was over 90% in all cases. It was also shown that the average length of the females was more than the males, but the average weight of the males was more than the females. The percentage of males and females with total length more than 102 mm were 63.7% and 72.1% respectively.
    Keywords: Biology ; Length ; Weight ; Relationships ; Male ; Female ; Freshwater ; Astacus leptodactylus ; Crayfish ; Bandar Anzali ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 9-18
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 13
    facet.materialart.
    Unknown
    Artificial propagation of tench (Tinca tinca) to fingerling size in 1994 (2021)
    In:  http://aquaticcommons.org/id/eprint/23913 | 18721 | 2018-08-01 16:23:44 | 23913 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: The tench, predominantly lacustina fish, lives in stagnant or sluggish water-bodies with silt covered bottoms. The artificial propagation aimed to produce fish fries for re-stocking programme in natural ecosystems. The brooders comprised of 130 female and 80 male fish. The individual’s weight of fishes ranged between 0.2 - 0.45 kg. The female and male fishes caught from wild stock, were separated and kept in two earthen ponds. The biotechnique of carp production were used for culture process. The eggs stripping conducted 8 times according to the ripeness of the brood stock. 60 female spawners were injected by the Gonadotropic hormone from pituitary glands of carp fish to induce the brooders. The used dosage was between 3-8 mg per kg of body weight, applied in two doses. With only one treatment, 6-8 mg hormone were injected per kg of body weight. Water temperature were 20-24°C in June. Male spawners were treated only once with 3-4 mg of the hormone per kg of body weight. The experiment showed, in two application the effective dose of hormonewas 6-8 mg, which helped 80-100% of the female fishes to discharge eggs. With one treatment, the efficiency of hormone was 7-8 mg, which induced 80-85% of the female spawners to release eggs. The eggs were put in saline carbamid solution mixture after fertilization to eliminate stickness and then washed with pure water. The previous washing treatment took 45-75 minutes and the next one 25-45 minutes. The eggs fertilization rate were 70-85%. Incubation of eggs up to the hatching in Weise jar were 2-2.5 days. The survival rate of the hatched fries were 85-95%, and the size of newly hatched larvae were 4.5-5mm. The larvae were placed into large Zuge glass. After 4-5 days the young fishes began to feed actively. The diameter of dry eggs were 0.52 - 4 mm and the swelled ones 0.8 - 0.65 mm. Number of eggs/spawners (working fecundity) were 10848 - 17710, and relative fecundity were between 80-350 eggs per 1 gram of body weight. Color of the eggs were bright yellow and greenish yellow.
    Keywords: Aquaculture ; Fish ; Eggs ; Biotechnique ; Gonadotropic ; Hormone ; Female ; Body weight ; Hatching ; Size ; Survival rate ; Tinca tinca ; Fingerlig ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 43-52
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 14
    facet.materialart.
    Unknown
    Histological study on the gonads of reared juvenile sturgeon (2021)
    In:  http://aquaticcommons.org/id/eprint/23934 | 18721 | 2018-08-01 17:07:39 | 23934 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: Histological studies are of the most adequate way to determine the physiological condition of fish organs. The present research was carried out in order to conduct a qualitative evaluation of the growth and development of the reproductive system of three sturgeon species (Acipenser persicus, Acipenser gueldenstaedti, and Huso huso). In this evaluation two histological approaches, gonadectomy and biopsy, were employed. The studied sturgeons consisted of 58 one, two and six years old reared juveniles. Some 60% of the one-year-old Huso huso were of unknown sex, 20% were previtellogic females and 20% of the males were in the early stage of spermatogenesis. On the other hand 50% of the one-year-old Acipenser persicus were also of unknown sex, 30% premature females and 20% premature males. Some 30% of two-year-old Huso huso were of unknown sex, 40% premature females and 10% of the females were in stage I of sexual maturity and 10% were premature males. Among the six-year-old specimens, 60% of the Acipenser persicus were females in stage II of sexual maturity, 20% were males between stage II and III of sexual maturity and 20% were of unknown sex, while in the same age group 50% ofAcipenser gueldenstaedti were males in stage II of sexual maturity and 50% were females in stage II (semi lipid) of sexual maturity. The results of the study indicated that 28.75% were females were in stage II of the sexual maturity, 14.28% were female in stage II (lipid) of sexual maturity, 14.28% females in stage I of sexual maturity, 28.75% males between stage II and III of sexual maturity and 14.28% were males in stage IV of sexual maturity. The conducted study on the juvenile sturgeon confirmed that the growth process of the gonads occurred as it would have happened under natural circumstances. Occurrence of six-year-old Huso huso in stage IV of sexual maturity indicated that the rearing conditions in the fiberglass tanks and earthen ponds have been favorable and on the other hand no extra surplus energy has been used.
    Keywords: Biology ; Histological ; Juvenile ; Evaluation ; Sexual ; Gonadectomy ; Species ; Physiological ; Gonad ; Growth ; Sturgeon ; Female ; Huso huso ; Acipenser persicus ; Acipenser gueldenstaedtii ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 1-16
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 15
    facet.materialart.
    Unknown
    Dichelyne minutus Rudolphi, 1819 (Nematoda : Cucullanidae) infection in Neogobius fluviatilis and Neogobius kessleri from southern part of Caspian Sea (2021)
    In:  http://aquaticcommons.org/id/eprint/23941 | 18721 | 2018-08-01 17:58:17 | 23941 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: During a parasitological study on two Goby species, 15 Neogobius kesslerithe and 30 Neogobius fluviatilis caught in the South Caspian Sea and Tajan River (Mazandaran Province) respectively. The fish nematode Dichelyne minutus Rudalphi 1819 was isolated from 15 N kessleri and 2 N. fluviatilis. Both male and female specimen of this parasite, were observed in the intestine of 17 fishes, some of which had penetrated into the mucous membrane of the intestine. The infection rate in N. kessleri and N fluviatilis were 100% and 6.6% respectively.
    Keywords: Fisheries ; Health ; Nematoda ; Cucullanidae ; Neogobius fluviatilis ; Neogobius kessleri ; Goby ; Species ; Nematode ; Male ; Female ; Specimen ; Parasite ; Fishes ; Mucous ; Infection rate ; Dichelyne minutus ; Parasitological ; Caspian Sea ; Tajan River ; Mazandaran Province ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 31-38
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 16
    facet.materialart.
    Unknown
    Sex hormones changes in the reproductive cycle of female Trichiurus lepturus (2021)
    In:  http://aquaticcommons.org/id/eprint/23943 | 18721 | 2018-08-01 17:17:40 | 23943 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: Ribbon fish, family Trichiuridae, is one the most important protein resources of the Indian Ocean. The considerable density of these aquatic animals, especially the dominant species Trichiurus lepturus, has drawn many researchers' attention to its biological characteristics and its reproductive characteristics in particular. The sampling was carried out in the Oman Sea from March 95 to November 96 (n=778). Studies on Estradiol - 17 - β, Progesterone and Cortisol hormones in female Trichiurus lepturus indicated that the production of these hormones increases considerably from maturity stage II. The serum levels of Estradiol - 17 - β hormone peaked during September, October and November and it remained high in the other months (1500 pg/ml). High levels of Progesterone occurred from December to March (during the spawning season). The changes in the Cortisol levels from August to December and again from February to March (0.5 - 3.5 mic/100 ml) were significant. The Estradiol - 17 - β fluctuation was observed simultaneously with the vitellogenesis process and absorption of Vitelline by the oocytes during their maturation. The changes in the oocytes membrane as well as the perforated channels impact on serum levels of Estradiol - 17 - β and Cortisol hormones have been discussed in this paper. The relative high levels of Estradiol - 17 - β during the whole year is probably related to the long spawning season of this species during autumn, winter and spring.
    Keywords: Aquaculture ; Biology ; Sex ; Hormone ; Female ; Trichiurus lepturus ; Ribbon fish ; Trichiuridae ; Protein ; Density ; Aquatic ; Species ; Estradiol ; Progesterone ; Serum level ; Spawning ; Fluctuation ; Vitellogenesis ; Absorption ; Oocytes ; Biological ; Reproductive ; Estradiol ; Oman Sea ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 49-68
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 17
    facet.materialart.
    Unknown
    An investigation on feeding habits of northern pike of Anzali Lagoon (2021)
    In:  http://aquaticcommons.org/id/eprint/23953 | 18721 | 2018-08-02 11:10:53 | 23953 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: Northern pike (Esox lucius L.) as a major game fish can be valuable in the management of water resources. In the present study, a total of 152 pikes from four areas: Abkenar (24%), Sorkhankool (10%), Siakeshim (54%) and Sheyjan (12%) were sampled. Female fishes were 75.6% of the samples and males were only 24.4%. Northern pike showed relatively fast growth and fishes above two years of age were mature and reached an average length of 32 cm. Feeding intensity and growth co-efficient in this species were correlated. Growth was highest in the lower age groups and with an increase in age and size, the feeding intensity and growth co-efficient of this have decreased. Northern pike in different ages feeds on different species of fish found in Anzali Lagoon. The most important of these fish species are Carassius auratus, Hemiculter leucisculus, Rhodeus sericeus amarus and larvae of Chalcalburnus chalcoides. In the 0+ age group pike mainly feeds on zooplanktonic Mysids. The results of the present study showed that Northern Pike is not restricting populations of commercial fish species of Anzali lagoon, but on the contrary it plays an important role in biological control of reproduction and propagation of non-commercial species like C. auratus and H. leucisculus.
    Keywords: Biology ; Feeding ; Esox lucius L. ; Female ; Males ; Growth ; Fishes ; Age ; Mature ; Length ; Species ; Size ; Carassius auratus ; Hemiculter leucisculus Rhodeus ; Sericeus amarus ; Larvae ; Chalcalburnus chalcoides ; zooplanktonic ; C. auratus ; H. leucisculus ; Biological ; Sheyjan ; Siakeshim ; Sorkhankool ; Abkenar ; Anzali Lagoon ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 75-91
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 18
    facet.materialart.
    Unknown
    An investigation on food habits and spawning season of Acanthopagrus latus (Sparidae) in the Persian Gulf (2021)
    In:  http://aquaticcommons.org/id/eprint/23948 | 18721 | 2018-08-02 11:22:50 | 23948 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: Food habits and spawning season of Acanthopagrus latus (Sparidae) were studied in Bushehr, Delvar and Rostami waters of the Persian Gulf. Samples have been collected from March 1996 to February 1997 on a monthly basis. A total of 87 males and 95 females were examined and different biological parameters were measured. The Relative Length of the Gut (RLG) was estimated to be 0.64, which indicates that this is a carnivorous species. Food items have also been identified using numerical method. Out of 159 stomachs studied 36.36% were found to contain crabs, 33.99% other fish and 13.43% shrimps. The content of snails and sea urchins were 11/46% and 4/ 76% respectively. It is evident from the results of the study that A. latus feeds mainly on crabs and fish. The vacuity index was calculated to be 0.13. This indicated that this fish is an active predator. The Gonadosomatic Index (GSI) was estimated to be highest during February - March and lowest in June. GSI maxima was coincided with fecundity peak. The relationship between (GSI) and fish weight for females and males were r2=0.0235 and r2 =0.0214 respectively.
    Keywords: Biology ; Food Habits ; Spawning ; Acanthopagrus latus ; Sparidae ; Samples ; Male ; Female ; Length ; Gut ; RLG ; Species ; Numerical method ; Fish ; Shrimp ; Snail ; Sea urchins ; A. latus ; Feed ; Crab ; Vacuity index ; Gonado Somatic Index ; GSI ; Biological ; Delvar ; Bushehr ; Persian Gulf ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 13-21
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 19
    facet.materialart.
    Unknown
    Reproduction biology of Astacus leptodactylus eichwaldi in the Iranian coastal water of the Caspian Sea (Bandar Anzali) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25270 | 18721 | 2018-09-07 07:54:06 | 25270 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Sampling of Astacus leptodactylusc were conducted in order to determination of biometrical and biological parameters suchas length, weight, sex ratio, fecundity and natural reproduction time. Two transect were selected at 49 34 and 49 36 geographical position on east Caspian Sea near to Anzali city. Metallic folding trap with Silurus glanis as attractive diet were used to catch Astacus leptodactylusc at each line the traps were set on depth of 35, 45, 55 and 65 (5 trap at each depth). Random sampling from each depth on tow lin for one year were conducted and the biometry performed on catched Astacus leptodactylusc where their sext uality and their ration were determined for eacd month , season and whole year. Absolute fecundity determined by cooking Astacus leptodactylusc , taking out the ovary weighing and counting them .Working fecundity assesed by separating eggs from their swiming leges while enomerate all egg . Complete randomized test of ANOVA for analysing the data were employed. The results showed average length and welght were calculated 122/07±1/74mm and 57/96±1/81gr respectively. Average absolute fecundity was 310/22 ±10/72 eggs , average working fecundity was 251/84±8/84 eggs, Average ovary weight was determined 4.31±0.619 gr and average number of eggs in one gr was 74/52±1/53 eggs. The sextual ratio in all year long was 1:1.32. The reproduction season is about seven month from Feburary to July and the moulting of males occurs two times each year. One of time is at May and the other is in September. The female molt thtina as the male start for second time.
    Keywords: Biology ; Iran ; Caspian Sea ; Bandar Anzali ; Biology ; Astacus leptodactylus eichwaldi ; Sex ratio ; Fecundity ; Silurus glanis ; ANOVA ; Female ; Male ; Coastal water
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 78
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 20
    facet.materialart.
    Unknown
    Study on breeding of imported brood stocks Litopenaeus vannamei in Iran environment (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25338 | 18721 | 2018-09-12 10:05:42 | 25338 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Regarding to breeding the Litopenaeus vannamei, a total of 126 pairs of broodstocks were imported from Hawaii to Iran in 2004 and 2005, and then transferred to the Bandargah Research Station in Bushehr. The female broodstocks were ablated, and were feeded 3 times per day with cuttlefish, small size shrimp and Nereis worm with a ratio of 30% body weight. The water exchange were done 3 times per day. During the years 2004 and 2005 a total 1700000 naupli were produced of which 772000 specimens of pl13 and pl7 were harvested and then transferred to Helleh Site for carrying out the next culture project. The average naupli and postlarvae were 170000 and 92000 in proportion to each broodstock. Also the mean survival rate was estimated 54%.
    Keywords: Aquaculture ; Iran ; Persian Gulf ; Bushehr ; Litopenaeus vannamei ; Broodstock ; Breeding ; Female ; Cuttlefish ; Shrimp ; Nereis worm ; Body weight ; Nauplii ; Specimens ; Survival rate ; Breeding
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 36
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 21
    facet.materialart.
    Unknown
    Survey on health status in aquaculture sturgeons centers (Mazandaran, Guilan And Golestan Provinces) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25330 | 18721 | 2018-09-13 12:40:49 | 25330 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Study of survey health management and diseases in hatcheries and fish farms can help us to knowledge and application control methods such as: prevention, treatment and increase high levels of production in hatchery and farms, finally. This survey carried out from 2005 to 2008 for 4 years in sturgeon hatcheries and farms of Golestan province. Sturgeon fishes include Huso Huso, Ship sturgeon, Acipenser persicus collected and for virology, bacteriology, fungius and hematology examined. Also, physicochemical parameters measured and recorded in different stages of culture. Results of this study showed that all of samples in virology was negative and did not observe any doubetful causes. In bacteriology CFU was variation from 3/9 ×105 to 6/9×10. The most parasites that detected in this survey was Cocolanus espherolanus, Sceria binopsulus semiarmatus and Amphilina fuliacea that separates from Acipenser Percicus, especially. The results about hematology parameters some important hematological indices of ship sturgeon include: The total RBC for female and mail specimens measured as 5.3±1.5 ×10^5, 4.8±0.5×10^5 per mm^3 respectively. The amount of haematocrit and hemoglobin for female and mail determined: 34.3±2.8, 35±1.4 percent and 10.3±0.9, 8.9±0.8 gr/dl .The MCV: 216.3± 96.2, 736.5± 102.5, MCH: 720.2±309.5, 186±0.7 and MCHC: 30±0.8, 25.5±3.4 percent respectively.The total WBC were (female, male): 21320±1054, 20580±777 per mm^3 and neutrophil: 16.4±2.5, 17±1.4 percent and lymphocyte: 74.4±2.4, 73.5± 0.7 percent and eosinophil: 6±1.4, 6.4±0.5 percent, monocyte: 2.8±0.8, 3.5±0.7 percent. There was not any significant differences (p〉0.05) between mentioned parameters in male and female (students t-test). Also evaluation of hematological parameters in bluga ( Huso huso) include: total RBC were (male , female) 5±0.3 ×105 , 4.9±0.6 ×105 per mm^3 ,respectively and hematocrit: 33.2±6.7 , 35.4±3.4 percent and hemoglobin: 11.2±1.5 , 12.2±1gr/dl and MCV: 669.9±172.2, 723.9±982.4 and MCH: 226.2±42.5, 249.5±35.4 and MCHC: 34.1±2.4, 34.6±3.6 percent respectively. The totals WBC were (male, female): 24800±707.1, 23042±1375.4 per mm^3 and neutrophil: 18.5±0.7, 21.4±1.1 percent and lymphocyte: 73.5±1.4, 68.4±1.1 percent and eosinophil: 5±2.8, 7±1.2 percent and monocyte: 3.5±3.5, 3.2±0.8 percent. According to statistically study the count of lymphocyte had significant difference between male and female fish and this count in male was higher than female. (p≥0.05).
    Keywords: Aquaculture ; Iran ; Golestan Province ; Mazandaran Province ; Guilan Province ; Fish ; Sturgeon ; Huso huso ; Ship ; Acipenser percicus ; Bacteriology ; Parasitology ; Health management ; Diseases ; Survey ; Aquaculture ; Hatcheries ; Samples ; Sceria binopsulus ; Amphilina fuliacea ; Female ; Male
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 395
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 22
    facet.materialart.
    Unknown
    Biological aspects of Sepia pharaonis in the Bahrekan waters (NW Persian Gulf) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25182 | 18721 | 2018-09-03 17:06:03 | 25182 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: The biological aspects of Sepia pharaonis was studied during years 2006-07. The studied area restricted to the Bahrekan in Khouzestan province covering the depths of 2 up to 25m. The sampling methods were gillnet and bottom trawl. A total of 310 specimens collected, of which there wasn’t found any cuttlefish in the study area from July to October (5 months). The collected samples were transferred to the laboratory ashore for further biological measurements consist of: Mantle length, Body weight, sex determination. Gonado-Somatic Index, and determination of Spermatophoric Index, Spawning season, Food preference, Maturity stages and chemical analysis for food value determination. The results showed that the overall sex ratio is about M:F= 2:1 with percentage of 67.41% for males and 32.50% for females. Males are significantly bigger than females with average mantle length (ML) of 233.3 and 269.3 mm for female and male, respectively; with body weight of 1102.3 and 1450.6 g. The mantle length body weight relationship was found W=0.001 ML 2.540 (R2= 0.92) Female as: W= 0.0015 ML 4797 (R2= 0.93) male From point of feeding, the food preferences results indicated that fish is considered as main food, crabs as minor food and other marine organisms such as bivalvia and gastropods as random food. The highest vacuity Index (CV) and empty stomachs was determined for March-April and the lowest value was is December. Also, the maximum GSI was estimated for March-April months in which showing coherrances with the lowest food preference. The maximum spermatophoricfilaments were 856 and 45 for male pharaoh cuttlefish with mantle length of 300 and 185 mm, and on the other hand this values for fecundity were estimated 1589 and 53 for female specimens with 254 and 198 mm mantle length. The spawning season occurs in April- March in which accompany with migration of pharaoh cuttlefish towards shallow waters. The fishing season would be in this period in w.
    Keywords: Biology ; Iran ; Khouzestan province ; Bahrekan ; Sepia pharaonis ; Gillnet ; Sampling ; Specimens ; Weight ; Sex ; Gonado-somatic index ; Spawning ; Maturity ; Female ; Male ; Bivalvia ; Gastropods
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 85
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 23
    facet.materialart.
    Unknown
    The effect of thyroxine (T4) on prematurating in female, on survival percent, growth and development of egg and larval in rainbow trout, grass carp, silver carp and barbell of Caspian Sea (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25118 | 18721 | 2018-08-22 02:17:23 | 25118 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Studies show that thyroxine can play an important role in regulating growth and other physiology activities. Since the direct role of thyroxine in growth metamorphose larval of bony fishes hasn't been proved yet, during the experiment accomplished in Shahid Ansari and Jajrood station, the hormones function in the survival of development of silver carp, grass carp and rainbow trout were studied. In this study accomplished of thyroxine baths with 0.1, 0.5 and 1 ppm (with 3 repeat). The other phase, thyroxine injected to females grass carp, silver carp, rainbow trout and barbell of Caspian Sea with different doses (1, 10 and 100 g/g B.W.). Tehn survival of development of embryo and larval and precent of fertilization were studied. Also, the percent of mortality were compared in two phases in stages of development. Results show that: 1) Trout: a) Phase of thyroxine bath: The number of hatching eggs and survival of larval in 0.5 ppm were increased to other treatment. b) Phase of hormone injection: The survival of larval in treatment of 10 g/g was 8.58% that was meaningful difference to other treatment (P〈0.05). 2) Silver carp: a) Phase of thyroxine bath: The number of hatching eggs and survival of larval in 0.5 ppm were (20%) increased to other treatment (P〈0.5). b) Phase of hormone injection: The survival of larval in treatment of 10 g/g was meaningful difference to other treatment (P〈0.05). 3) Grass carp: a) Phase of thyroxine bath: The number of hatching eggs and survival of larval in 0.5 ppm were 39% increased to other treatment. b) Phase of hormone injection: The survival of larval in treatment of 1 g/g was meaningful difference to other treatment (P〈0.05). 4) Barbel of Caspian Sea: Development stages wasn't determined in this fish. Number of eggs degenerated, number of eggs were the first development stages and growth of numbers increased on ovary.
    Keywords: Biology ; Chemistry ; Iran ; Caspian Sea ; Thyroxine ; Female ; Survival ; Growth ; Egg ; Larval ; Grass Carp ; Silver Carp ; Thyroxine (T4)
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 39
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 24
    facet.materialart.
    Unknown
    A survey on some biological aspects of spiny lobster Panulirus homarus for optimizing fishing season in Sistan - o – Baluchestan province (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25222 | 18721 | 2018-09-05 16:40:25 | 25222 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Research project was conducted on some biological aspects of lobster in Oman Sea in the years1385-86. During the project some parameters such as length distribution, spawning peak, length (Carapace) at first maturity, the length at which 50% of the lobsters were found to be mature sexually, sex ratio, relative frequency index and population dynamics parameters were examined. Quantitative factors and catch composition of lobster including the amount of catch in terms of weight and number of ovigerous-female, under-sized specimens and so were compared by monthly. According to the results of present study caught specimens were male with carapace length of 22 and 110 mm respectively. The smallest ovigerous female was taken as 46mm CL when length at first maturity was estimated to be 69-70mm. the male: female ratio was 0.7: 1.3 for the whole year. A closed fishing season for the species is proposed during spring and September and October in Oman Sea. A large amount of the catches for the all sampling months came from the under-sized specimens, consist of 50 to 85% of the total catch. Therefore, presence of these small length groups have direct effects on time of closing season. Population dynamics parameters were calculated as follows: K=0.57 year, L∞= 103mm and Ǿ = 8.69. Total mortality (Z), natural mortality (M) and fishing mortality (F) coefficients were calculated as 2.73, 0.87 and 1.86, respectively. Exploitation ratio for the whole population was 0.681, indicating an overexploitation of the species. Based on the available data, the recruitment pattern for lobster was obtained for two season including spring (major) and autumn (minor). Catch per unite effort (CPUE) was calculated as 0.908 kg/Cage/day which was higher in comparison with two other areas including Ramin and Chabahar. Examination of CPUE for a 10-year period showed a decreased trend and the reduction for the year 1386 was about 30% when compared to the data from the year 1375. Moreover, the mean length during 1369-70 to 1385-86 (present study) decreased for the three areas including Pozm, Ramin and Chabahar, so that the carapas length decreased up to 10 mm in length. This sudden decrease in mean length during the 10-year period should be considered as a serious precariousness for sustainable exploitation of lobster in Oman Sea along Sistan and Baluchistan province.
    Keywords: Biology ; Iran ; Oman Sea ; Sistan and Baluchistan province ; Chabahar ; Survey ; Spiny Lobster ; Panulirus homarus ; Fishing ; Spawning ; Length ; Maturity ; Sex ratio ; Female ; Specimens ; Species ; Mortality ; Population
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 68
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 25
    facet.materialart.
    Unknown
    The production of all-female in rainbow trout (Oncorhynchus mykiss) using indirect feminization (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25767 | 18721 | 2018-10-13 08:03:37 | 25767 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: The sex reversal technique in fish is widespread in many countries. The development of these techniques is desirable because rainbow trout males reach their gonad maturity earlier compared to the females. Rainbow trout alevins were treated with 17α-methyltestosterone incorporated in the diet (0.5. 1.5, 3, 6 and 10 mg/kg) for 60 days from the beginning of first feeding. Sex was determined at 180 and 680 dpf by sampling fish (n = 20) from each group and examining gross gonadal morphology under a dissecting microscope. Also sex reversal ratio and growth performance were determined in hormone-treated groups. These sex reversed functional males were reared for brood stock until they attained sexual maturity. At the end of experiment, normal rainbow trout eggs were fertilized with the sperms taken from sex reversed males for producing all-female populations. Examination of the results showed that 17α- methyltestosterone was effective in all treatment. The highest sex reversal ratio with 100% was observed in group treated with 0.5, 1.5 and 3 mg/kg 17α- methyltestosterone. The highest live weight ratios were observed in groups fed with 6, 0.5 17α-methyltestosterone and control group. Female progeny produced from the sex reversed males were 100 % in all males that sired offspring. All female trout stocks produced by this method have advantage in rainbow trout culture since the fish is not meant for direct human consumption and is used to generate brood stock, therefore, difference of growth parameters do not influence the success.
    Keywords: Aquaculture ; Biology ; Iran ; Sex differentiation ; Oncorhynchus mykiss ; Sex reversal ; Hormone treatment ; 17-αmethyltestosterone ; Female ; Population ; Steroids ; Gonad ; Maturity ; Rainbow trout ; Sexual
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 38
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 26
    facet.materialart.
    Unknown
    Study of possibility of reproduction and mass culture of Nereis diversicolor (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25127 | 18721 | 2018-08-26 13:33:35 | 25127 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: The present study was firstly conducted to study the rate of sexual maturity in Nereis diversicolor under suitable conditions of temperature and photoperiod. The second objective was to determine the potential of artificial breeding in these worms for mass culture. Nereis diversicolor worms were collected from the Anzali lagoon in 4000 sampling operations during the year’s 2004 to 2006 using Ekman grab with a surface area of 400 cm2. The water salinity, temperature and total organic matter (TOM) of sediments in the sampling region was recorded. The worms were maintained in 0.5 tons (1 x 1 m^2) tanks containing clayey-muddy sediment to a height of 20 cm covered with 10 cm water (5 ‰) until they reached a weight of 200-300 mg. Sexual maturity in this species was attained at 4-6 ºC and spawning occurred at approximately 16 ºC. The first gametes were observed five weeks after the temperature increased from 6 to 16 ºC. Sexual maturity was studied at various salinities (0.5, 5, 12, and 15 ‰). Results indicate that these worms attained earlier sexual maturity at salinity of 15 ‰, compared to other salinities studied. No significant differences (P〉0.05) were observed between sexual maturity attained at 12 ‰ and 15 ‰. Stocking density (20, 50, 100, 150 worms) was studied in terms of sex and showed that number of females were higher than males and the ratio was 11:1 (female: male). No significant differences (P〉0.05) were observed between the various stocking densities and their replicates. The effect of light and photoperiod in synchronizing reproduction in male and female N. diversicolor was studied. It was evident that reproduction behavior in adult worms increased for a period of one week at the end of each month after they are exposed to a prolonged photoperiod (L:D=16:8) followed by a period of dim light (simulated using 1 W lamps). Feeding trials were carried out with Saccharomyces cerevisiae, formulated fish diets and humus. Results showed that this diet was effective in speeding up sexual maturity in worms and significant effect of treatment was observed (P〈0.05) in worms fed a diet of humus alone. Eggs and sperms were fertilized and worms developed from the young monotrochophore with jelly layer to the trochophore larvae.
    Keywords: Biology ; Iran ; Anzali Lagoon ; Reproduction ; Sexual Maturity ; Fertilization ; Nereis Diversicolor ; Culture ; Salinity ; Temperature ; Spawning ; Female ; Male ; Larvae ; Sacchromyces cerevisiae ; Density
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 68
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 27
    facet.materialart.
    Unknown
    Status of the tiger tooth croaker, Otolithes ruber (Schneider, 1801) and jinga shrimp, Metapenaeus affinis(H. Milne Edwards, 1837) stocks in Khouzestan coastal waters (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25404 | 18721 | 2018-09-20 12:28:18 | 25404 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Population dynamics parameters and exploitation ratio of Jinga Shrimp, Metapenaeus affinis were studied from Sep 2011 to Dec 2011 and data collected from two landing places (Hendijan and Lifee-Bosif). During the project, more than 2200 specimens of jinga shrimp were measured. The mean value of length for the male and female were calculated as 9.8±0.86, 10.24±1.18 and mean value of weight for the male and female was as 6.730±1.64, 8.14±2.90 respectively. The length-weight relation were calculated as TW=0.024TL2.24 (n=1084,R^2=0.71) for males, TW=0.011TL2.80 (n=1081,R^2= 0.81) for females also we found significant different level length-weight relation in P〈0.05. The growth parameters of von Bertalanffy equation were as, L_∞: 14.73 and K: 1.1 and t0: -0.02. The estimated valve of total mortality, natural mortality, fishing mortality and exploitation ratio is Z: 4.35, M: 1.68, F: 2.67, E: 0.61 respectively. By using method analyses knife-edge selection, relative yield per recruitment (Y'/R) :0.014, relative biomass per recruitment, (B'/R) :0.085., Exploitation ratio maximum sustainable yield, Emax : 0.38; biological reference points for Jinga Shrimp stock was calculated. MSY and fmsy value was 600T and 46100day respectively. Result in this study showed exploitation ratio Jinga Shrimp stock is over fishing and decreases exploitation ratio proposed.
    Keywords: Aquaculture ; Iran ; Khuzestan province ; Jinga Shrimp ; Population ; Dynamics ; Exploitation ; Tiger tooth Croaker ; Otolithes ruber ; Metapenaeus affinis ; Population ; Male ; Female ; Mortality ; Coastal waters
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 202
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 28
    facet.materialart.
    Unknown
    Study of some biological characteristics of golden grey mullet (Liza aurata) in Iranian Coastal waters of the Caspian Sea (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25184 | 18721 | 2018-09-03 17:16:24 | 25184 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: During last 65 years the catch of mullets had increasing trends with some fluctuations in the Iranian coastal water of the Caspian Sea .In this period about 138 thousand tons of mullets have been caught. Mullet’s account for 35% of total catch annually .In recent years species composition of mullets has chanched in the Iranian coastal water of the Caspian Sea and catch composition of golden grey mullet increased from 76% in 1995 to 98% in 2006. In this survey some biological characteristics of golden grey mullet have been studied in Iranian coastal water of the Caspian Sea .Fish samples have been gathered from commercial catch of beach seine cooperatives monthly in Iranian coastal water of the Caspian Sea over 2006 and 2007. In the laboratory fishes have been measured biometrically and biological parameters have been calculated .Also catch statistics of mullets during 2006-2007 have been obtained and discussed. Results showed that the catch of mullets in beach seine cooperatives during 2006 and 2007 was 4181 and 3685 tons respectively that golden grey mullet contribute 99% and 98% of the catch composition of mullets respectively. Length range of golden grey mullet caught by beach seine cooperatives was 19-50.2 cm with mean length of 32.7 ± 6.4 (± SD) and weight range was 67-1475 gr with mean weight of 411 ± 255 gr. The age structure of this species was comprised 2-10 years old fish with mean age of 4.42 years old. In this survey totally the sex ratio of male: female of golden grey mullet was 356: 434 that was significant variation from equal sex ratio. Pick of the spawning in Guilan province was in October and in Mazandaran and Golestan provinces was in November. In October the proportion of spawning females declined from western area (Guilan province) towards eastern parts (Golestan province).The highest proportion of spawning females was in December in Golestan province. The highest GSI index value was observed in September and October and it was decreased in November and December and it was consistent during January till April. The mean absolute fecundity was 700881±429987 eggs with minimum and maximum fecundity of 200112 and 2282862 eggs respectively. The Lm 50% for female golden grey mullet was calculated as 33.6 cm.
    Keywords: Biology ; Iran ; Caspian Sea ; Golestan province ; Guilan province ; Golden grey mullet ; Liza aurata ; Species ; Survey ; Samples ; Male ; Female ; Sex ratio ; Spawning ; GSI ; Fecundity ; Coastal waters
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 56
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 29
    facet.materialart.
    Unknown
    Artificial propagation and Culture of Rutilus frisii kutum of Autumn form for restocking (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25202 | 18721 | 2018-09-05 16:22:51 | 25202 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: The Kutum, Rutilus frisii kutum, is one of the most important bony fishes in Iranian coastal of Caspian Sea. Its harvest range is between 9000-10000 tons in a year, nearly 60% of the income of Bony fish fishery produced by kutum fishery. The stock of this species reduced drastically in 1982 and the catch slumped to the less than 250 tons in a year. Kutum spawning grounds deterioration, illegal catch, and lack of restocking program were the main cause of the decline. This Spices in nature comprised by two distinct form, autumn and spring form. It is worth to be mentioned, by the effect of Caspian Sea Bony fishes Research Center s experts in 1983, artificial spawning and releasing the fries to the sea were commenced and the catch steadily improved. But all activities concerning restocking of kutum concentrated in spring form, as at present about 260 million its fries are released into sea for restocking by Iranian Fisheries Organization, but for above reasons and lack of restocking program, the populations of autumn form gravely shrinked and neared to be extinct. Therefore, to enhance the biodiversity and boost fishers livelihood of kutum in Caspian Sea this project implemented by cooperation of Iranian Fisheries Organization (IFRO) and Caspian Environment Program (CEP) in Aquaculture Institute (Inland Waters). In this project, brooders caught from Anzali lagoon and maintained in two different condition, include of floating cages in Anzali lagoon and earthen ponds in Sefidrud Fisheries Research Station. The results showed that there weren’t significant differences between two maintenance statuses in maturation period and other reproductive characteristics of brooders. The ratio of male to female was 1 to 1.4. Minimum and maximum weight measured 1450 to 3100 g (with average of 1850 g) in female and 670 to 1900 g (with average of 1165 g) in male, respectively. The first natural spawning of brooders occurred in the end of January in temperature of 8 till 10 °C in concrete ponds. Also, some of maintained brooders in earthen ponds spawned in February. The average number of absolute, function and relative fecundity determined 88565 16809, 73805 14008 and 48670 12056, respectively. For artificial spawning, male and female brooders injected by pituitary gland with dose of 2-3 and 4-5 mg/kg body weight, respectively. Approximately, 10 and 8 present of female were over-ripe and immature in March (artificial spawning time), respectively. More than 59 % of injected female brooders induced to spawning in first stage after 10-12 hours and 13 % of them in twice stage and 7-8 hours after first stage. And also, 27.6% of females didn’t positive response to injection. Dry method used for eggs fecundity and incubation period lasted 7- 10 days in 14-16 °C. In totally, eggs fertilization were more than 95% and the average of eggs fertilization percent in throughout of period measured more than 92.7 6 %. Eyed eggs appearance occurred 3 days after fecundity and its mean was 92.7 15.1%. Larvae after yolk sac absorption feed with dry milk for 4-5 days and then introduced into fertilized earthen ponds (500 m2 and equipped to aerators) in intensive condition and fed with micro pellet food for 3-4 month. In finally, more than 1.8 million fries of 1-2 g and some more than 5 g produced and released into Anzali lagoon to its restocking for first time. It is expected that continuing of restocking process of autumn form kutum by Iranian Fisheries Organization eventuate to population increasing of this form in Caspian Sea in future.
    Keywords: Aquaculture ; Iran ; Caspian Sea ; Anzali Lagoon ; Sefidrud River ; Artificial propagation ; Culture ; Rutilus frisii kutum ; Kutum ; Bony Fish ; Fishery ; Spawning ; Biodiversity ; Aquaculture ; Brooders ; Fecundity ; Male ; Female ; Population
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 79
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 30
    facet.materialart.
    Unknown
    The amino acid compositions of muscle from wild and cultured of male and female Acanthopagrus latus (2021)
    In:  http://aquaticcommons.org/id/eprint/25929 | 18721 | 2018-11-22 06:49:55 | 25929 | Khorramshahr University of Marine Science and Technology
    Details
    Publication Date: 2021-07-16
    Description: The crude protein content and amino acid compositions of muscle from wild and cultured of male and female Acanthopagrus latus were determined by HPLC. There were quantitative differences between individual amino acids in the tissues investigated, depending on the sex and location. It was noted that, among all the samples studied in tissues, sexes and locations, lysine and isoleucine were the principal essential amino acid (EAA) and glutamic acid was mainly for non-essential amino acid (NEAA). Lysine and isoleucine of male muscles had a significantly higher (P〈0.05) amount than female muscles. The crude protein content in male and female muscles was not found to be significantly different. Depending on location, the percentages of arginine, leucine, isoleucine, lysine, serine, glycine, alanine and tyrosine were significantly different (P〈0.05) in muscles of wild and cultured fish. The wild seabream possessed considerably higher protein content than cultured seabream muscle. The results showed that wild male fish muscle contained a higher (P〉0.05) level of EAA than other groups. The results indicate that the Acanthopagrus latus is a healthful component of the human diet.
    Keywords: Aquaculture ; Biology ; Iran ; Amino acid ; Composition ; Muscle ; Male ; Female ; Acanthopagrus latus ; NEAA ; Protein
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 58-66
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 31
    facet.materialart.
    Unknown
    The effect of repeated implantation of triiodo thyronine on the performance of physiology of cultured female great sturgeon (Huso huso) (2021)
    In:  http://aquaticcommons.org/id/eprint/25952 | 18721 | 2018-11-22 07:24:13 | 25952 | Khorramshahr University of Marine Science and Technology
    Details
    Publication Date: 2021-07-16
    Description: The objective of this study was to examine the effects of triiodothyronine (T_3) implantation on the performance of physiology of cultured great sturgeon (Huso huso). Three treatments with 5 fish for each treatment were considered. The experimental treatments included: control (capsules containing cocoa butter alone), low level of T_3 (T_1; 1 mg T_3/kg body weight + cocoa butter), and high level of T_3 (T_10; 10 mg T_3/kg body weight+ cocoa butter). The capsules containing hormones and cocoa butter were intraperitoneally implanted to 3-year-old pre-vitellogenic stage female fish (mean initial body weight 6999.7±100.9 g) every 6 weeks over a six month period from January 2009 to June 2010. The serum levels of some hormone (T_3, cortisol, ACTH) and biochemical parameters (glucose, cholesterol and calcium) were determined at the initial time and three weeks after each implantation. Growth indices (WG, SGR and CF) were determined at the end of the experiment. The results showed that fish treated with the high and low T_3 doses produced significant changes in thyroid hormone levels (P〈0.05). Serum cortisol was significantly higher in T_3- implanted fish than in control fish (P〈0.05). Serum glucose and calcium concentrations were significantly greater in fish treated with the high T_3 doses compared to the other two experimental groups (P〈0.05). Significant differences were observed in serum ACTH and cholesterol concentrations among treatments in the last and second sampling time, respectively (P〈0.05). Final weight was the highest in T_1-implanted fish; intermediate in those implanted the high T_3 dose, and lowest in controls (P〈0.05). These results indicated that the long-term implantations of T_3 hormone influence the physiological parameters of great sturgeon and promote the somatic growth in a physiological dose.
    Keywords: Aquaculture ; Iran ; Implantation ; Triiodothyronine ; Performance ; Physiology ; Female ; Great sturgeon ; Huso huso ; Body weight ; ACTH ; Serum ; Fish
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 90-105
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 32
    facet.materialart.
    Unknown
    Production of artificial diets and determination of their effects as alone and combination with natural wet diet on female western white shrimp broodstock maturation (Litopenaeus vannamei) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25801 | 18721 | 2018-10-13 08:37:23 | 25801 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Due to the usefulness of shrimp broodstock pelleted diets, from aspects of, easier maintenance, transportation, broodstock feeding, and cheaper as compared to natural wet diets, the use of natural wet foods, include sand worm (Perinereis nuntica), cattle fish )Sepia pharaonis) and veal livier decreased and the quantity of pelleted diet increased. Survey was conducted, in tankes with a volume of 300 liters. Tanks were filled with 150 liters of water. 10 broodstock in each tank was left, with an average weight of 37±2 grams. Daily feeding rate, was twenty-five percent of their biomass. The survey was include, 9 treatments with 3 replicates in each tank as described below. Control treatment: broodstock feeding only with, sand worm (33%), cattle fish (34%) and bull livier (33%). Exprimental treatment 1: broodstock feeding with pelleted diet contain 50 percent crude protein and 8 percent crude fat (50%)+sand worm (16 %)+cattle fish (18%)+veal livier (16%). Treatment 2: broodstock feeding with pelleted diet contain 50 percent crude protein and 10 percent crude fat (50 %)+sand worm (16 %)+cattle fish (18%) and veal livier (16%). Treatment 3: broodstock feeding with pelleted diet contain 40 percent crude protein and 10 percent crude fat (50%)+sand worm (16 %)+cattle fish (18 %) and veal livier (16 %). Treatment 4: broodstock feeding with pelleted diet contain 40 percent crude protein and 8 percent crude fat (50 %)+sand worm (16 %)+cattle fish (18 %) and veal livier (16 %). Treatment 5: broodstock feeding with pelleted diet contain 50 percent crude protein and 10 percent crude fat (100 %). Treatment 6: broodstock feeding with pelleted diet contain 50 percent crude protein and 8 percent crude fat (100 %). Treatment 7: broodstock feeding with pelleted diet contain 40 percent crude protein and 10 percent crude fat (100 %). Treatment 8: broodstock feeding with pelleted diet contain 40 percent crude protein and 8 percent crude fat (100%). The results showed that, Gonadosomatic index (GSI) in treatments 3: control and 6, was significantly more than others treatments (p〈0.05). Hepatosomatic indexes, in often treatments was almost equal, and in some cases were significantly different (p〈0.05). In treatments 3 and control, absolute fecundity, was significantly more than others treatment (p〈0.05). The survival percent, in treatment 8 was significantly less than others treatments (p〈0.05). The survival percent in others treatments was not significantly difference (p〉0.05). From the aspect of mean weight of broodstock, wasn’t significant difference in treatments (p〉0.05). From the aspect of mean length of carapac, wasn’t significant difference in treatments (p〉0.05). From the aspect of mean body length, wasn’t significant difference in often treatments (p〉0.05), and in treatments 5 and 6 was significantly less than others (p〈0.05). In the determination of relasheship between kind of treatments and abundance of maturated broodsock, wasn’t significantly difference (p〉0.05). In the determination of, correlation between weight (g) and total length(cm), (r=0.71), weight and carapace length (cm) (r=0.70), the correlation was strong. Between GSI, HIS, carapace length and total length the correlation was intermediate (r=0.54). The correlation between absolutely fecundity and total length (r=0.20), absolutely fecundity and carapace length (r=0.28), absolutely fecundity and weight (r=0.35) was weak. The results showed that, the use of combination of pelleted diet and natural wet diets can increase female maturation indexes. Totally we can noted that, GSI, HIS and absolute fecundity of broodstock, that fed with pelleted diet contain 40 percent crude protein and 10 percent crude fat (50 %)+sand worm (16 %)+cattle fish (18 %) and veal livier (16 %) (treatment 3) was better than the other treatments. Positive effects of this treatnent on sexual indexes, was due to provide part of nutritional requirement of shrimp broodstock from pelleted diet.
    Keywords: Aquaculture ; Iran ; Natural wet diet ; Pelleted diets ; Maturation ; Male ; Female ; Western white shrimp ; Artifitial diets ; Broodstock ; Litopenaeus vannamei
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 38
    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...