Welcome to AquaDocs!
AquaDocs is the joint open access repository of the UNESCO/IOC InternationaI Oceanographic Data and Information Exchange (IODE) and the International Association of Aquatic and Marine Science Libraries and Information Centers (IAMSLIC) with support from the FAO Aquatic Sciences and Fisheries Abstracts. It is a thematic repository covering the natural marine, coastal, estuarine /brackish and fresh water environments and includes all aspects of the science, technology, management and conservation of these environments, their organisms and resources, and the economic, sociological and legal aspects. [see About]
Previous OceanDocs Registered Users: please set a new password on first login to AquaDocs, using the 'forgot password' option on the login page. If you find you cannot submit to a Collection for which you previously had permission in OceanDocs please email email@example.com
Previous Aquatic Commons Registered Users: please Register on AquaDocs
Communities in AquaDocs
Select a community to browse its collections.
An estimate of the sea level trend along the Tunisia coastsThis study evaluates the sea level trend along the Tunisia coasts based on available historical and recent tide gauge observations for the period 1880-2018. The stations used are located in the Tunisia coasts and in the western side of the Strait of Gibraltar. Sea level series based on reanalyses and Mediterranean Sea model simulations are also used. First, a single series representing the western Strait of Gibraltar sea level evolution is constructed. Then, the sea level series along the Tunisia coasts is constructed based on the hypothesis that the observed sea level drop relative to that in the western side of the Strait of Gibraltar remains nearly unchanged when long term periods are considered. The constructed series for the Tunisia coasts shows an evident sea level rise superimposed on a decadal variability in connection with the North Atlantic Oscillation (NAO). For the whole period, the estimated sea level trend is +1.5 mm/year, whereas it is +3mm/y for the recent period 1980- 2015. In addition to the widely accepted of the sea level rise acceleration during the recent decades, this higher trend may also be attributed to the effect of the decadal variability. Projections for the future state of the sea level along the Tunisia coasts are given based on the trend estimates found in this study.
A zoomed 3d circulation model for the Monastir bay: comparison to operational analysesThe present work aims at developing a zoomed 3D hydrodynamic model that simulates the circulation of water masses for the Central-Eastern coasts of Tunisia (Nabeul to Chebba) with the bay of Monastir in the center. The resolution of the model gradually increases from the edges (~ 1100 m) towards the bay of Monastir where it is of the order of 300 m. The model is forced at the sea surface by atmospheric data from a neighboring weather station and by ocean re-analyses. We present here a comparison between the results of the model and the reanalyses for the simulated year 2008. The outputs of the model show a strong seasonal cycle with winter cooling and summer warming more accentuated near the coasts. The surface salinity is modulated by the penetration of the Atlantic water vein in the Gulf of Hammamet, more important in summer. Near shallow coastal areas, the salinity is relatively high especially in the bay interior and is more accentuated in summer. The circulation is characterized by currents directed towards the southeast in winter and the West and Northwest in summer. These simulation results are similar to those of the re-analyses. The re-analyses offshore currents are, however, oriented towards the southwest in summer. A comparison of vertical sections of temperature and salinity shows high agreement with the presence of the trace of the Atlantic water vein at a depth of about 50 to 60 m.
Tres nuevos registros de hidrozoos (Cnidaria: Hydroidomedusae), para Cuba.Se registran por primera vez para aguas cubanas una familia, tres géneros y tres especies de hidrozoos marinos. Esta es la primera cita de Pteroclava kempfi para el Océano Atlántico.
Estimation of the spawning ground of some fish species in the Nha Trang bayThe paper presents the results of determining the spawning grounds of some fish species in Nha Trang bay MPA, which were sampled in 9/2018, 11/2018, 5/2019 and 7/2019. The analysis results are based on the distribution of the general density and the developmental stages, analysis of decision trees from egg density, location of stations and months by CHAID (Chi-square Automatic Interaction Detector), allowing a relatively accurate estimate of the spawning ground of the red anchovy (Encrasicholina punctifer Fowler, 1938) and the species of the genus Scarus. As a result, the main spawning grounds for red anchovy were the east of Hon Rua and the northeast of Hon Tam and that of Scarus is the southwest of Hon Mun island.
Captive culture of two sea snake species Hydrophis curtus and Hydrophis cyanocinctusAcclimation culture and trial culture of two sea snake species Hydrophis curtus and H. cyanocinctus in composite tanks were conducted to determine growth, survival rate, predation behavior and prey selection. The results showed that adults of H. curtus and H. cyanocinctus did not capture any prey such as anchovy, eel and shrimp in a period of 30 days of acclimation culture. The body weight of two these species reduced gradually from 783.3 ± 76.4 g and 360.0 ± 60.0 g to 660.0 ± 135.2 g and 315.0 ± 77.8 g, respectively. Survival rate was 100% in H. curtus and 80% in H. cyanocinctus. Meanwhile, the results of acclimation culture of sea snake juvenile revealed that frozen anchovy was preferred prey in both of two species. The body weight of H. curtus increased from 49.8 ± 0.5 g to 70.0 ± 8.2 g and that of H. cyanocinctus was 44.3 ± 3.1 g to 47.1 ± 5.2 g. The prey capture rate of H. curtus and H. cyanocinctus was 100% and 60%, respectively. Survival rate of the juvenile of two species was 100% after 30 days of acclimation culture. In 60 days of trial culture, similar results as acclimation culture were observed in adults of two sea snake species, they still did not capture any prey and the body weight reduced gradually. The result of 60-day culture of sea snake juvenile showed that the prey capture rate was 100% in both of two species. The body weight of H. curtus and H. cyanocinctus increased from 70.0 ± 8.2 g and 57.5 ± 5.8 g to 78.3 ± 15.3 g and 65.0 ± 14.1, respectively. SGR of H. curtus was 0.16 ± 0.32 %/day and that of H. cyanocinctus was 0.52 ± 0.36%/day. The survival rate of H. curtus and H. cyanocinctus was 60% and 40% in period of 60 day trial.