ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

Your email was sent successfully. Check your inbox.

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

Proceed reservation?

Export
Filter
  • Fisheries
  • GEOPHYSICS
  • Management
  • Organic Chemistry
  • 2020-2022  (6)
  • 2020  (6)
Collection
Years
  • 2020-2022  (6)
Year
  • 1
    Publication Date: 2021-05-19
    Description: The present work deals with the study of fish larvae of coral reef fishes in the Red Sea (Hurghada). It was aimed to study the spatial and temporal variations of fish larvae for management purposes. Sampling stations were chosen at Marina, Sheraton, Magawish and Arabia. The samples were taken monthly throughout the period of the study from August 2014 to July 2015 using plankton nets of different mesh sizes (150, 350, and 500 micron). The highest density of larvae was observed in July when 841 larvae 1000m-3 were collected whereas, the lowest density was recorded in March and October at 11 1000m-3. The highest number of species was recorded in Sheraton with 28 species followed by Magawish with 27 species recorded followed by Marina with 26 species recorded while the lowest was recorded in Arabia with 25 species. Concentration of larvae was significantly different between months and sites. There was a significant difference in the number of species between months but not between stations. Larvae of mullid fish were abundant in summer while larvae of clupeids were observed all year round.
    Description: Published
    Keywords: Fish ; Larvae ; Commercial fisheries ; Management
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.476-496
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Publication Date: 2021-05-19
    Description: Beach seine is fishing gears that occupy all depths of water from surface to bed by non-gillnet net. Increasing non-standard catches caused this survive was done to standardization of the beach seine mesh size. The research was started from winter of 2017 to spring of 2017, performing 73 hauling with four mesh sizes of 26, 28, 30 and 33 mm (knot to knot) in the bag area of ​​the beach seine in Miankaleh region of Golestan Province. According to the mesh size used in the bag section, the results showed that the highest amount of catches from different mesh size was done in size of 26 mm. Also, the maximum lengths were found for Liza aurata, Risso, 1810 in different mesh size in the 30-35 cm class length and for Alosa caspia, Linck, 1790 for 35-40 cm and for Rutilus kutum, Kamensky, 1901 at 30 to 35 cm. Also, in the mesh size of 26 mm, 50 percent of Lisa fish was caught at the length of 24.87 centimeters, in mesh size of 30 mm, 25.66 centimeters and mesh size of 32 mm, 26.65 centimeters. Also, the length of 50% of the permitted catch was obtained 25.5 centimeters by using 30 mm mesh size. According to the results, it was found that the Beach seines in the region did not caught selective and did catch much fish below the standard length.
    Description: Published
    Keywords: Alosa caspia ; Fisheries ; Beach seine ; Catch ; Mesh size
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.13-21
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    Publication Date: 2021-05-19
    Description: The purpose of this study was evaluation of export performance of Iranian caviar and identification of its affecting factors. Therefore, this study has examined theimpact of variables like ability of strategic sustainability management, the measure of export market-oriented and export flexibility taking into consideration of environmental differences between internal and external market on export performance of Iran's caviar. Current research with the view to objective is applied research and with a view to data collection is descriptive research and Statistical population of this study to include all managers of exporting firms Caviar exporting companies in Iran. Cronbach's alpha was 0.9 which indicates that the reliability of the questionnaire is appropriate. Connection between research variable has been investigated through path analysis in LISREL Version 8.8 software. The consequence of this study shows that strategic sustainability management has the most impact on Caviar export performance of Iran. After that parameters of export flexibility, export market-oriented behavior finally dynamic of market have significant and positive impact on export performance.
    Description: Published
    Keywords: Fish ; Marketing ; Sustainability ; Management ; Export
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.85-93
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    Publication Date: 2021-05-19
    Description: Las fluctuaciones de las capturas de esponja en Cuba evidencian disminuciones que obligan a mantener un enfoque precautorio y velar por el estricto cumplimiento de las medidas regulatorias. Fueron objetivos de este trabajo determinar las principales variaciones de la abundancia, talla y calidad de esponjas comerciales en el golfo de Batabanó duran- te el período 2015-2019 y proponer medidas de manejo que favorezcan la sostenibilidad del recurso. La densidad se estimó en transectos de 2x100 m (200 m2). El potencial pescable, expresado en toneladas métricas, fue calculado a partir de la densidad promedio de individuos. La cuota de captura se calculó en base al 15 % del potencial pescable. Las especies más representadas fueron Spongia obscura y S. barbara. Las densidades encontradas (entre 0.01 y 0.03 ind/m2) fueron bajas, pero se corresponden con las reportadas a finales de la pasada década, lo que corrobora la estabilización de las capturas (cuota anual promedio de 18.7 TM) y evidencia la efectividad de las actuales medidas de manejo. Sin embargo, la densidad y talla muestran tendencia a la disminución entre 2015 y 2019. Esto, unido a la disminución de la abundancia de Hippospongia lachne, a la presencia de esponjas muertas (total o par- cialmente) y a mala calidad de varios ejemplares, sugiere el deterioro del stock pesquero. Basado además en las afectaciones del hábitat re- portadas para esta región, se recomienda disminuir la cuota anual al 10 % del potencial pescable, no extraer ejemplares menores a 15 cm de diámetro mayor e implementar nuevamente el cultivo.
    Description: Commercial sponge catches in Cuba show decreases that require maintaining a precautionary approach and ensuring strict compliance with regulatory measures. This study aims to determine variations in abundance, size and quality of commercial sponges in the Gulf of Batabanó, during the 2015-2019 period, and to propose fishing management measures that favor this resource sustainability. Sponges den- sity was estimated in 2x100 m (200 m2) tran- sects. The fishing potential, expressed in metric tons, was calculated from the average density of individuals. The catch quota was calcula- ted based on 15 % of the fishing potential. The most represented species were Spongia obscura and S. barbara. The densities found (between 0.01 and 0.03 ind/m2) were low, but correspond to those reported at the end of the last decade, which corroborates the stabilization of catches (average annual quota of 18.7 metric tons) and demonstrates the effectiveness of the current fishing management. However, the density and size show a tendency to decrease between 2015 and 2019. This, together with the decrease in the abundance of Hippospongia lachne, the pre- sence of totally or partially dead sponges and the poor quality of some specimens, suggests the deterioration of the fishing stock. Based on the habitat affectations reported for this region, it is recommended to reduce the annual quota to 10 % of the fishing potential, not to extract specimens smaller than 15 cm in diameter and to implement sponge aquaculture again
    Description: Published
    Keywords: Spongia ; Manejo pesquero ; Pesquerías ; Sostenible ; Batabanó ; Spongia ; Fishing management ; Fisheries ; Sustainable ; Batabano
    Repository Name: AquaDocs
    Type: Journal Contribution , Not Known
    Format: pp.72-85
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    Publication Date: 2021-05-19
    Description: Human economic activities have caused many environmental impacts that can be attributed to climate change as the most important side effects. One of the components of climate change is the change in rainfall pattern, time and space distribution of rainfall, and also the reduction of rainfall. Considering the importance of water inputs in economic activities, especially agriculture and fisheries, in the present study, the effect of rainfall change on the value added of the fisheries sector in the short and long term has been studied. For this purpose, the Auto-Regressive Distributed Lag model (ARDL) has been used. The results of this study indicate that rainfall in the short and long run has a positive and significant effect on the added value of the fisheries sector. Rainfall by improving access to surface water and groundwater resources has indirect effects on improving the value added of the fisheries sector. According to the results, it is suggested that fish catch limits be applied in critical areas affected by climate change. Also, in order to adjust and adapt the country's aquaculture sector to shocks caused by rainfall and climate change, the field of technology and production improvement should be provided through providing banking and financing facilities.
    Description: Published
    Keywords: Climate Change ; Rainfall ; Fisheries ; Technology
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.57-66
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 6
    Publication Date: 2021-05-19
    Description: Since the consumption is the main target of production and desired items of manufactures must be in the same direction with consumer demands through seller, evaluation of purchase and sale trends have specially importance. Therefore, this study was conducted in 1393 in order to evaluate the purchase and sale trend in the fish market of Guilan province’s in Bandar Anzali, Astara, and Kiashahr ports. Using a questionnaire data were collected from 30 fish store. Friedman test and chi-squared test were used to analyze the data from descriptive statistics. The results showed that most (26.6%) of fish sellers in Guilan ports were 31 to 40 years old. Most of them have had middle school or high school educations. About half of them have had 10 to 20 year experience, and 65% had 3 or 4-person families. 70% of fish market sellers in these ports possess facilities such as refrigerators to appropriately supply fish, but over 80% of them were lacking in counters. The research findings showed that sellers believed that the buyer and the consumer should give the most attention to freshness and quality when buying fish. In order to evaluate the priorities on not to be consumed fish by consumers from suppliers’ perspective, the unpleasant smell, the tiny bones and the difficulty of cleaning were first to fourth priorities. Sellers found that the healthiness and freshness were as the most important factors in consuming fish from the viewpoint of consumers. In addition, it was discovered that, regarding sellers, lack of access to final consumers, high rent, high municipal taxes, lack of buyers’ awareness lack of awareness, and low space in stores are not among problems with which fish sellers are faced in the markets of Guilan ports. Therefore, organizing these markets and equipping them with counters and standards and, modernizing the traditional market is an essential factor.
    Description: Published
    Keywords: Fish ; Marketing ; Fisheries ; Consumer ; Ports
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.55-65
    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...