scholarly journals EXOTIC ZOOPLANKTONS IN SHIP BALLAST WATER ARRIVED AT SAIGON PORTS 2008-2009

2011 ◽  
Vol 14 (4) ◽  
pp. 50-60
Author(s):  
Quoc Viet Nguyen ◽  
Triet Tran
Keyword(s):  
Water Samples ◽  
Ballast Water ◽  
Viet Nam ◽  
Zooplankton Species ◽  
Unidentified Species ◽  
Marine Bioinvasion ◽  
Ship Ballast Water

Zooplanktons in ship ballast water is an important factor in marine bioinvasion. From September 2008 to January 2009, two hundreds ballast water samples were collected from oversea ships arrived at Sai Gon port. Results of taxonomical analysis identified 43 zooplankton taxa, 5 groups of shrimp larvae, crabs, polychaeta and 1 unidentified species. Among the zooplankton species identified, there were 9 species that were not seen in Viet Nam from previous studies. They are Pseudodiaptomus clevei, Bestiolina sp., Pseudodiaptomus sp., Harpacticus sp., Amphiascus sp., Jalysus sp., Hemicyclops sp., Kelleria sp., Stephos sp. and one unidentified species.

Seasonal and spatial distribution of mesozooplankton in a tropical estuary, Nha Phu, South Central Viet Nam

Biologia ◽  
2014 ◽  
Vol 69 (1) ◽  
Author(s):  
Trinh Truong ◽  
Cho Nguyen ◽  
Nguyen-Ngoc Lam ◽  
K. Jensen
Keyword(s):  
Annual Variation ◽  
Zooplankton Community ◽  
The Other ◽  
Viet Nam ◽  
Tropical Estuary ◽  
Zooplankton Species ◽  
South Central ◽  
Stable Conditions ◽  
Hydrographic Conditions ◽  
Euterpina Acutifrons

AbstractThis study provides a description of mesozooplankton (holo- and meroplankton) abundance, biomass and diversity patterns inside and outside a tropical estuary (Nha Phu Estuary, Khanh Hoa, Viet Nam). In total 185 zooplankton species have been recorded during the study period (2009–2010), copepods contribute with the largest share of species (more than 100), Tunicata with 20, Cnidaria with 17 and Chaetognatha with 9 species. At the most species rich site the number of zooplankton species varies between 55 and 123. The number of species and the annual variation in numbers declines towards the head of the estuary (14–37 species). In contrast, the highest numbers of individuals occur in the inner part of NPE. Calanoids that are the most abundant group of the copepods occur in densities up to 28.2 ind. L−1 (Aug. 9). At ‘Outer NPE’ and ‘Outside NPE’ the maximum density of calanoids is 5.8 and 10.7 ind. L−1, respectively. The declining diversity of zooplankton towards the head of the estuary is also supported by various indices (Shannon’s index, Margalef’s index). A cluster analysis on similarity of species supports a clustering of the inner NPE sites vs the other sites. There is a general separation between the dominant copepod species in the inner (Bestiola sp., Acartia pacifica, Pseudodiaptomus incisus) and outer (Paracalanus gracilis, Acrocalanus gibber, Subeucalanus subcrassus, Oithona rigida, Corycaeus andrewsi, Oithona plumifera) part of the estuary though a few species are common in both areas (Paracalanus crassirostris and Euterpina acutifrons). The zooplankton community at the inner NPE is subjected to more variable hydrographic conditions (salinity in particular) than the communities at the other sites where more stable conditions prevail. A short residence time in the inner part of the estuary due to the tide is supposed to impede a strong horizontal structuring of the zooplankton community.

scholarly journals Preventing maritime transport of pathogens: the remarkable antimicrobial properties of silver-supported catalysts for ship ballast water disinfection

2017 ◽  
Vol 76 (3) ◽  
pp. 712-718 ◽  
Author(s):  
C. P. Theologides ◽  
S. P. Theofilou ◽  
A. Anayiotos ◽  
C. N. Costa
Keyword(s):  
Ballast Water ◽  
Supported Catalysts ◽  
Antimicrobial Properties ◽  
Antimicrobial Treatment ◽  
Water Disinfection ◽  
Shipping Industry ◽  
E Coli ◽  
Ionic Silver ◽  
Short Period ◽  
Ship Ballast Water

Ship ballast water (SBW) antimicrobial treatment is considered as a priority issue for the shipping industry. The present work investigates the possibility of utilizing antimicrobial catalysis as an effective method for the treatment of SBW. Taking into account the well-known antimicrobial properties of ionic silver (Ag+), five silver-supported catalysts (Ag/γ-Al2O3) with various loadings (0.05, 0.1, 0.2, 0.5, and 1 wt%) were prepared and examined for the antimicrobial treatment of SBW. The bactericidal activity of the aforementioned catalysts was investigated towards the inhibition of Escherichia coli (Gram-negative) and Escherichia faecalis (Gram-positive) bacteria. Catalytic experiments were conducted in a three-phase continuous flow stirred tank reactor, used in a semi-batch mode. It was found that using the catalyst with the lowest metal loading, the inhibition of E. coli reached 95.8% after 30 minutes of treatment of an E. coli bacterial solution, while the inhibition obtained for E. faecalis was 76.2% after 60 minutes of treatment of an E. faecalis bacterial solution. Even better results (100% inhibition after 5 min of reaction) were obtained using the catalysts with higher Ag loadings. The results of the present work indicate that the prepared monometallic catalysts exert their antimicrobial activity within a short period of time, revealing, for the first time ever, that the field of antimicrobial heterogeneous catalysis using deposited ionic silver on a solid support may prove decisive for the disinfection of SBW.

Ship Ballast Water Management in Turkish Ports and Waterways

2011 ◽  
Vol 45 (2) ◽  
pp. 23-32
Author(s):  
Tanzer Satir ◽  
Bhaskar Kura
Keyword(s):  
Water Management ◽  
Ballast Water ◽  
Structural Integrity ◽  
Marine Pollution ◽  
The Black Sea ◽  
Marine Habitat ◽  
Efficient Operation ◽  
Western Asia ◽  
Ship Ballast Water ◽  
Ballast Water Management

AbstractThe introduction of invasive marine species into a new environment by ballast water attached to ship hulls has been identified as one of the four greatest threats to the world’s oceans. The other three are land-based sources of marine pollution, overexploitation of living marine resources, and physical alteration/destruction of marine habitat. Ballast is any material used to add weight to balance an object. One example includes the sandbags carried on conventional hot air balloons, which can be discarded to lighten the balloon’s load, allowing it to ascend. Ballast water is water carried by ships to ensure stability, trim, and structural integrity. Shipping moves over 80% of the world’s commodities and transfers approximately 3‐5 billion tons of ballast water internationally each year. A similar volume may also be transferred domestically within countries and regions each year. Ballast water is absolutely essential to the safe and efficient operation of modern shipping, providing balance and stability to unladen ships. However, it may also pose a serious ecological, economical, and health threat to the marine environment.Turkey is a Eurasian country that stretches across the Anatolian peninsula in western Asia and southeastern Europe. Turkey is surrounded by three seas: the Mediterranean Sea, the Black Sea, and the Aegean Sea. The Turkish straits that separate Europe and Asia are one of the busiest waterways of the world. Turkey has several ports and berthing facilities. The number of ships coming to ports or passing through the straits has been increasing in the last decade. Half of these ships are carrying ballast water. Turkey has not ratified the International Convention for the Control and Management of Ships’ Ballast Water and Sediments (BWM) as yet but will soon prepare ballast water strategies. This paper discusses two different topics: ship ballast water management strategies and treatment technologies. The authors recommend the best strategies for prevention of ship ballast water pollution in the Turkish straits and ports.

Chip-Based Portable Device for Detection of Microalgae Viability in Ballast Water

2014 ◽  
Vol 522-524 ◽  
pp. 3-6
Author(s):  
Jun Sheng Wang ◽  
Hui Chu ◽  
Jin Yang Sun ◽  
You Nan Song ◽  
Jin Hu Jiang ◽  
...  
Keyword(s):  
Ballast Water ◽  
Rapid Detection ◽  
Detection System ◽  
Pulse Signal ◽  
Label Free ◽  
Environmental Threats ◽  
Sheath Fluid ◽  
Micro Channels ◽  
Drive Systems ◽  
Ship Ballast Water

Ship ballast water has been identified as one of four major environmental threats by the international maritime organization. This paper presents a portable on-site rapid detection system of microalgae in ship ballast water. The system consists of a microfluidic chip platform, LED light source and drive systems, optical detection system, ARM software and hardware system, power supply system and so on. Microalgae particles can go through the detection area inside the micro channels one by one by using a sheath fluid focus. The resulting chlorophyll fluorescence is converted to the electrical pulse signal by photodiode. The experimental results show that the system can quickly and accurately detect the ballast water living microalgae concentration. The minimum detectable microalgae size is about 3μm (mean diameter). This system has some advantages such as miniaturized, portable, fast, accurate and label free, and has great potential for on-site rapid detection of ship ballast water.

Potential invasions of phytoplankton in ship ballast water at South Korean ports

2016 ◽  
Vol 67 (12) ◽  
pp. 1906 ◽  
Author(s):  
Bonggil Hyun ◽  
Kyoungsoon Shin ◽  
Min-Chul Jang ◽  
Pung-Guk Jang ◽  
Woo-Jin Lee ◽  
...  
Keyword(s):  
Marine Environment ◽  
Ballast Water ◽  
Specific Growth ◽  
Environmental Parameter ◽  
The South ◽  
South Korean ◽  
Phytoplankton Communities ◽  
Survival And Growth ◽  
Specific Growth Rates ◽  
Ship Ballast Water

We studied the phytoplankton communities in ballast water in ships that arrived at two South Korean ports. We determined the potential for phytoplankton in the ballast water to invade the South Korean marine environment, given the specific growth rates of the phytoplankton, the delay before the phytoplankton started growing, and the rate at which the phytoplankton would initially disperse in ports and bays. Most of the phytoplankton in the ballast water samples originated in countries such as China and Japan that are adjacent to South Korea, and diatoms dominated these phytoplankton communities. The abundance of phytoplankton in a sample did not appear to be related to any particular environmental parameter, including the voyage duration. However, the number of phytoplankton taxa in a sample decreased as the voyage duration increased. The survival and growth of phytoplankton communities in the South Korean marine environment were assessed, and we found that most invasions failed at the initial dispersal phase, especially when a community was introduced to pier-side seawater. However, some members of phytoplankton communities, if they were dispersed and where conditions were highly eutrophic, could grow fast enough to overcome the initial dispersal phase in South Korean ports and bays.

scholarly journals Prevalance of vibrio SPP. Isolated from aquaculture and environment in Cai Be district, Tien Giang province

2019 ◽  
Vol 2 (3) ◽  
pp. 18-23
Author(s):  
TRUONG HUYNH NGOC ◽  
Keyword(s):  
Water Samples ◽  
Viet Nam ◽  
Aquaculture Water ◽  
Vibrio Spp

The prevalence of Vibrio spp. incommercial seafood and the aquaculture water collected in Cai Be district, Tien Giang province, Viet Nam was studied. More than five hundred samples including 311 aquaculture water samples and 190 seafood samples were collected and analyzed. The results showed that there were 161 water samples and 82 seafood samples containing 8 species of Vibrio spp. Among those V. parahaemolyticus, V. mimicus, and V. alginolyticus were the most abundant.

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