ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

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
  • 1
    Publication Date: 2018-07-25
    Description: The main fishing ground for shrimps in Hormozgan province along the Persian Gulf are located in the north of Qeshm Island to Sink area with a yearly catch of 1500m2000 tons from east coast of Hormozgan province located in Iranian waters of Oman Sea. Collection of breeder shrimps in important fishing grounds of Sinik to Jask area was started in 1995 for shrimp culture objectives and the present research was carried out in 2001 to 2002 and 2007, aiming at identifying shrimp species, determining frequency distribution of the species in the catch and evaluating shrimp maturity stages in the catch. Samples were collected using swept area method on a biweekly or monthly basis. Result showed that Fenneropenaeus indicus was dominant in the shrimp catch comprising 44.8-59.5% while this rate was 13.534% for Fenneropenaeus merguiensis, 15.7-20.5% for Penacus semisulcatus, 5.5-16% for Metapenaeus affinis, 0d•14.5% for M stebbingi 04.5% for Parapenaeopsis stylifera in the Jask and Sheik areas in 2001-2002 and 2007. CLm500/0 was 34.7mm for F. indicus females, 31mm for F. merguiensis, 34.3mm for P. misulcatus and 27.16mm for M. affinnis in Jask and Sink areas. Tukey test showed that the average carapace length in F. indicus, F. merguiensis and P. semisulcatus caught in Jask were significantly larger than those from Sink area (P〈0.05). Sex ratio was not 1:1 in these shrimp species and there is significant differences between them (P〈0.05). Maximum abundance of F. indicus, F. semisulcatus, M affninis and F. merguiensis spawners, were found during March to June in Jask and June to July in Sinik areas.
    Keywords: Aquaculture ; Biology
    Repository Name: Aquatic Commons
    Type: Article , PeerReviewed
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Publication Date: 2018-10-13
    Description: In recent years the incidence of algal blooms caused by Nodularia to become one of the serious problems and is threated life of aquatic organisms in the southern Caspian Sea. Nodularia is a Blue-green algae (cyanobacteria group) and due to production of nodularin toxin is importance. In this study, the first, three species of Pseudomonas including aeruginosa, putida and fluorescens were isolated from Tajan river estuary and identified using biochemical tests and compared to standard species. The trend of Nodularia spumigena biomass (log 5) and pseudomonas species (log 7 and 8) were examined in 30 treatments for 10 days in aquarium scale. Parameters such as chlorophyll a, dissolved oxygen, phosphate and nitrate were tested at different time the same time. The results showed that the decline trend of nodularia in aeruginosa and mixed species treatments were better than other treatments and log 8 of bacterium was also more inhibitory effect than to log 7. Similar results were observed in double layer on agar medium and latter treatments had algaecide effect on nodularia. However, putida and fluorescens treatments had algaestatic properties. Concentration of chlorophyll a, dissolved oxygen and nitrate in all treatments, especially aeruginosa and mixed bacteria have been often decreased (p〈0.05). Changes of latter factors in control treatment have been relatively consistent. Although the phosphate changes at different time of relative decline, but nevertheless significant differences were observed. The parameters examined in this study were in direct contact with the algae population and decrease or increase of these factors cause significant change in algae biomass. The conclusion showed that different strains of pseudomonas are able to reduce the population of algae N. spumigena in aquarium scale and the results observed in combination treatment were better than other treatments. The challenge examination of pseudomonas and nodularia in mesocosm scale, evaluation of bacterial metabolites, and also quality and quantity analysis of chemical and biological factors involved in the process is recommended and with achieve reasonable results can be made from this indicator bacteria during algal bloom in the larger ecosystem.
    Keywords: Ecology
    Repository Name: Aquatic Commons
    Type: Monograph or Serial Issue , NonPeerReviewed
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    Publication Date: 2018-07-15
    Description: Silver pomfret (Pampus argenteus) belongs to Stromatidae family and is considered an important commercial fish found in some major fishing grounds of the Hormozgan province (Iran) waters. The stomach contents of 853 collected specimens were investigated from June 2001 to November 2002. The change in stomach content relative to the length classes and gonad stages, vacuity index, gastro-somatic index and frequency percentage of different food items were also studied. The diet consisted of a broad spectrum of food types, but crustaceans (especially copepods) were dominant. The next major food group was Bacillariphyceae (16 genera), followed by Cyanophyceae (6 genera) and mollusks. Other major groups were Nematode worms, Foraminifera and Dinophyceae (6 genera). Copepods were the primary and main food items with the Bacillariophyceae being the second most important prey. The relationship between stomach contents and maturity stages in females showed that the food take up increased during adult stages and then decreased during spawning periods. The vacuity index (CV) was calculated as 14.49, indicating the voracity of Pampus argenteus. The gastro-somatic index was estimated to be 4.5 based on monthly and maximum values during February.
    Keywords: Biology ; Fisheries
    Repository Name: Aquatic Commons
    Type: Article , PeerReviewed
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    Publication Date: 2018-08-04
    Description: Collection of breeder shrimps in important fishing grounds of Hormozgan province was started in 1994. In this research which was carried out in March, April, June and July 2001 and 2002, we aimed at identifying shrimp species, determining frequency distribution of the species in the catch and evaluating caught maturity stages. We collected data on the catch of artisanal shrimp trawlers on a biweekly basis. Result showed that Penaeus indicus was dominant in the catch while P. semisulcatus and P. merguiensis comprised 20.5-20% and 13.5-19.5% of the catch in Jask and Sirik areas respectively. A Tukey test showed that average carapace length in P. merguiensis and P. semisulcatus caught in Jask were significantly larger than those from Sirik area (p〈0.05). Maximum abundance of P. semisulcatus and P. merguiensis spawners was found during March to June in Jask and June to July in Sirik fishing grounds.
    Keywords: Fisheries
    Repository Name: Aquatic Commons
    Type: Article , PeerReviewed
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    Publication Date: 2018-08-04
    Description: Twelve P. merguiensis specimens were collected from fishing grounds of Sirik area in the north of strait of Hormoz. The sampling was carried out from April to November 2003 and the brood-stocks with a mean weight 36.3 grams were transported to Kolahi hatchery center. The samples were kept in two separate 6 ton fiber glass tanks, filled with sea water with a salinity of 32ppt and temperature of 30 degrees centigrade. After spawning, the total collected nauplii from the first and the second tanks were 41800 and 960000, respectively. The survival rate from nauplii stage to PLi5 stage was 31% and 21.2%, for the two tanks respectively. We fed the larva up to N6 stage with Chaetoceros and from mysis to post larvae stages with Anemia. We conclude that Hormozgan province is a suitable area for collection of Banana shrimp brood-stocks and that propagation of the species can be successfully carried out.
    Keywords: Aquaculture
    Repository Name: Aquatic Commons
    Type: Article , PeerReviewed
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 6
    Publication Date: 2018-08-04
    Description: Fishing vessels equipped with bottom trawls cause high amount of by-catch and discards. We investigated the catch composition and by-catch percentage in October - November 2002 during shrimp fishing season in Hormuzgan Province waters. The studied area was located in DarmSoorkh area, east of Hormuz Island and Toola area. Sampling was done using wooden fishing dhows. During shrimp season, 36 hauls with a total catch of 6050kg were treated. The catch composed of 88 species belonging to 50 families of which 67 species were bony fish from 38 families, 9 species were cartilaginous fish from 6 families, and 3 species were mollusks from three families and also 9 species of crustacean were found belonging to 3 families. The percentages of different groups of by-catch and target catch (shrimp) were 49.4% small discards, 18.7% large discards, 4.7% commercial species and 27.2% shrimp. The ratio of total by-catch to shrimp was estimated to be about 2.7 times that of the shrimp.
    Keywords: Fisheries
    Repository Name: Aquatic Commons
    Type: Article , PeerReviewed
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 7
    Publication Date: 2018-08-06
    Description: The indian white prawn (Penaeus indicus), as one of the commercially important and dominant species along the East coast of Hormozgan province, is a very potential and prospective candidate species for shrimp farming. Since, there wasn't well enough information about biology of this species from Iranian wateres, therefore. some biological aspects such as growth rate, reproduction behaviour distribution pattern and feeding habits were studied from March 1997 to March 1998. Monthly sampling were carried out from the fishing grounds and estuaries of Jask area in the Oman Sea by small trawlers and beach seines gears. Initial growth 01 male was faster than female, with calculated K=l.5 for male and K=1.3 for female. Isometric growth trend was observed in both sexes. Sexual maturity attained within the first 12 months. Spawners were occured abundantly during post-winter, spring and beginning of summer. Postlarvae and sub-adults were found in the esturies with 25-100 mm length, and high densities were observed around the mangrove's roots. They spend at least 3 to 5 months of their life span in the esturies. Analysis of stomach contents revealed that this species is an omnivore with indicative contents of detritus, polychaetes, crustaceane, bivalves, algae and sand particles, with preponderance of vegetable constituents in the sub-adults and of detritus in adults.
    Keywords: Biology
    Repository Name: Aquatic Commons
    Type: Article , PeerReviewed
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 8
    Publication Date: 2018-09-07
    Description: Project was carried out at the Gomishan Centre for training and education which is located 15 km far from Gomishan City in the Golestan Province. Prebroodstocks were chosen from ponds (stocking density: 3/m^2). 860 male and 890 female broodstocks were separated and transferred into greenhouse (400 m^2). The average growth rate per day was 0.3 g and survival rate was 90%. After reaching 42 g in males and 52 g in females they were ready for Eyes stalk Brood stocks were transferred into propagation hall in June and after a week females gone under Eyes stalk. 10,890,000 eggs were yielded from 50 females and consequently 7, 187, 0.50 nauplius were produced. Each broodstock spawned 1.34 Times. The maximum hatching was 75% that in was average 64.2%. Mass of Cetocerous Algae was mass produced to be fed for post larvae. Finally 35,000 PL15 were yielded. PL15 were transferred into two half hectare and one 1 ha ponds in July. The stocking density was 18 PL/m^2. Biometric parameters together with air and water temperatures, and pH were recorded daily. Results indicate that the maximum survival rate was 58% (pond No. 5) and minimum was 52% (pond No. 17). The average weight after 101 days cultivating was 23 g which is appropriate. Also the average daily growth rate was 0.2g and the FCR was 1.
    Keywords: Aquaculture
    Repository Name: Aquatic Commons
    Type: Monograph or Serial Issue , NonPeerReviewed
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 9
    Publication Date: 2018-09-18
    Description: In this research, we investigated and compared the cytotoxic mechanisms of aqueous extract of C.polykricoides responsible for a severe and widespread HAB in the Persian Gulf and Gulf of Oman (2008-2009) in both isolated rat and trout liver hepatocytes. In addition, the role of oxidative stress and mitochondria in the induction of apoptosis were also investigated. Isolated hepatocytes were obtained by collagenase perfusion of the rat liver. To determine the hepatocyte “ROS” generation, dichlorofluorescin diacetate was used as the reagent. The uptake of the cationic fluorescent dye, rhodamine 123, has been used for the determination of hepatocytes mitochondrial membrane potential. Redistribution of lysosomotropic probe, acridine orange from lysosomes into cytosol was used for determination of lysosomal membrane damage. GSH and GSSG were determined using spectrofluorometric method. Caspase-3 activity and apoptosis phenotype were also determined using ‘‘Sigma’s caspase-3 assay kit and Sigma–Aldrich apoptosis detection kit, respectively. Incubation of algal extract with isolated rat hepatocytes caused hepatocyte membrane lysis, reactive oxygen species formation (ROS), glutathione depletion, collapse of mitochondrial membrane potential, ATP depletion and increase in ADP/ATP ratio, cytochrome c release in to the hepatocyte cytosol, activation of caspases cascade and appearance of apoptosis phenotype. antioxidants (α-tocopherol succinate and BHT), hydroxyl radical scavenger (mannitol and DMSO), Mitochondrial permeability transition (MPT) pore sealing agents (cyclosporine A, carnitine and trifluoperazine), NADPH P450 reductase inhibitor (Diphenyliodonium chloride), CYP2E1 inhibitors (Phenylimidazole and 4-Methylpyrazole) and ATP generators (L-glutamine, Fructose and Xylitol) inhibited the activation of caspase-3 and cell death. Our data showed, that algal extract activate apoptosis signaling via oxidative stress and mitochondrial pathway. ROS formation could directly be involved in mitochondrial MPT pore opening and activation of caspases cascade leading to toxic effect of C.polykricoides extract on both rat and trout hepatocytes. These findings contribute to a better understanding of C.polykricoides-toxic effects on mammalian and aquatic liver cells. Our findings revealed that trout hepatocytes are much more sensitive ( more than two hundred folds) to toxic effects of C.polykricoides extract than rat hepatocytes. On the other hand the algal extract induced lysosomal membrane damage only in trout but not rat hepatocytes.
    Keywords: Biology
    Repository Name: Aquatic Commons
    Type: Monograph or Serial Issue , NonPeerReviewed
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 10
    Publication Date: 2018-10-08
    Description: The conservation of coral colonies is very vital for marine organisms and human. In Chabahar Bay, the coral reefs are in danger of destruction due to the development program of Shahid Beheshti Port. In this project, over 30,000 hard corals were transported to coast of Hotel Lipar an area at a distance of 3.5-4 kms far from Shahid Beheshti Port. Also, the new techniques were used for coral reattachment and transportation. The operation has done within expert divers and consultancy of Prof. Dr. Maikle Risk. Four methods performance as pailots. Since the corals are very sensitive to turbidity and suspended sediments from land reclamation and dredging projects, therefore appropriate measures should be conducted for conservation and recovery of them.37 patches in size 5×10 meters has built with concerete. Diffent sizes of corals were separated by mechanical tools and transported to new sites and reattachment on artificial sea bottom.Three monthes after the last reattachments monitored showed that %96.93 of corals were in good health. This success was the important achievement because of innovating coral carrier and mass coral relocation. At present, the coral relocation is suggested as a good method for recovery of coral reefs after a disturbance in condition of their native habitats.
    Keywords: Aquaculture
    Repository Name: Aquatic Commons
    Type: Monograph or Serial Issue , NonPeerReviewed
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...