Welcome to AquaDocs!
AquaDocs is the joint open access repository of the UNESCO/IOC InternationaI Oceanographic Data and Information Exchange (IODE) and the International Marine and Aquatic Sciences Libraries and Information Centers (IAMSLIC) with support from the FAO Aquatic Sciences and Fisheries Abstracts. It is a thematic repository covering the natural marine, 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.
Previous Aquatic Commons Registered Users: please Register on AquaDocs
Communities in AquaDocs
Select a community to browse its collections.
Antibacterial potential of crude extracts from sea cucumber Holothuria fuscoscinerea Jaeger, 1833This study was conducted to determine the antibacterial potential of the crude extracts of skin, gonad, Cuvierian tubules, Polian vesicles and intestine of the sea cucumber Holothuria fuscoscinerea collected from Rasa Island, Narra, Palawan, Philippines. The antibacterial potential of the extracts was determined against Escherichia coli and Staphylococcus aureus using filter paper disc diffusion method with Tetracycline as the positive control and distilled water as the negative control. The analysis of variance (ANOVA) of the results showed significant differences in the effects of the treatments when tested against S. aureus and E. coli (p<0.05). Tukey’s test further proved that Polian vesicle was significantly highest in terms of antibacterial property among other extracts but not comparable to positive control against S. aureus. On the other hand, Tukey’s test showed that Cuvierian tubules and Polian vesicles were not significantly different from each other in terms of antibacterial effect but not comparable to tetracycline when tested against E. coli. The extracts from skin, gonad and intestine did not show inhibitory effect on the test organisms. T-test showed that E. coli and S. aureus were not significantly different in terms of susceptibility towards the treatments. Based on the results, extracts from Cuvierian tubules and Polian vesicles of H. fuscoscinerea are potential sources of antibacterial compounds.
Nesting incidence, exploitation and trade dynamics of sea turtles in Balabac Strait Marine Biodiversity Conservation Corridor, Palawan, PhilippinesThe study assessed the nesting incidence, threats to nesting habitats, exploitation and trade dynamics of sea turtles in the Balabac Strait Marine Biodiversity Conservation Corridor (MBCC). The most number of nests found belonged to the green sea turtle Chelonia mydas and only very few were of hawksbill sea turtle Eretmochelys imbricata. The shoreline vegetation was the most preferred nesting area, followed by beach forest and open beach. The eggs and meat of sea turtles in Balabac Strait MBCC are exploited for local consumption and trade. Information on trade route and local perception on conservation issues about sea turtles is also presented herein.
Composition, size and relative density of diatoms in the stomach of 4 to 75 day-old juvenile abalone Haliotis diversicolor (Reeve)The diatom biofilm that naturally grow on polyvinyl chloride plates serve as food of postlarva and juvenile abalone Haliotis diversicolor Reeve, called “tokobushi” in Japanese. Composition, size and relative density of diatoms in the stomach of 4, 7, 10, 13, 17, 21, 27, 35, 50 and 75 day-old tokobushi were evaluated to characterize their diatom intake. Stomach in glycol methacrylate resin was sectioned and examined under the light microscope, then analyzed using an image processing software. The diatoms present in the stomach of tokobushi were Thalassiosira, Melosira, Triceratium, Odontella, Asterionella, Licmophora, Thalassionema, Cocconeis, Navicula and Nitzschia. Only four varieties of diatoms were observed in 4 to 10 day-old tokobushi which coincided with initial feeding. The number and size of diatoms increased in 13 to 75 day-old juvenile, which were exhibited in its exponential growth pattern. The stomach of 4 to 13 day-old tokobushi contained small-sized diatoms (<67 μm) while both small and large-sized diatoms (>123 μm) were observed in 17 to 75 day-old juveniles. Higher relative densities (8.7 – 15.8 diatom/1000 μm2) of diatoms were documented in 4 to 10 day-old tokobushi while 17 to 75 day-old exhibited lower relative densities (1.2 – 4.2 diatom/1000 μm2). Generally, as young tokobushi increases in size, the diatom intake increases in composition and size but density decreases with increasing size of diatom ingested.
Water parameters of Pulang Lupa Lake, an abandoned open pit mine in Puerto Princesa City, Palawan, Philippines and its potential as bird watching destinationAbandoned open pit mines when properly managed can be an important settlement and eco-tourism sites. The Pulang Lupa Lake – an abandoned mercury open mining pit in Puerto Princesa City supports a number of settlers and important wildlife. With limited information about its status, this study was conducted to determine the lake’s water quality and its potential for eco-tourism. Water physico-chemical parameters were within the permissible limits sets by the Department of Environment and Natural Resources for Class C water during the rainy but not in summer season. Water samples for both seasons were positive for total and fecal coliform. The lake serves as important source of fish for informal settlers and the presence of several bird species makes it a potential bird watcher’s destination. Information and education campaign among the residents around the lake and strategic environmental plans are needed for its sustainable utilization.