Digital library

  • The secondary metabolites of seaweed Ulva fasciata and Hypnea musciformis,collected form southeast and southwest coast of India. were tested for biotoxicity potential. Both species bowed potent activity in antibacterial, brine shrimp cytotoxicity, larvicidal, antifouling and ichthyotoxicity assays.

    Author(s): Joseph, Selvin, Lipton, A P
  • BioProcess Algae LLC has been selected to receive a grant of up to $6.4 million from the U.S. Department of Energy (DOE), as part of an innovative pilot-scale biorefinery project related to production of hydrocarbon fuels meeting military specification. The project will use renewable carbon dioxide, lignocellulosic sugars and waste heat through BioProcess Algae’s Grower Harvester(TM) technology platform, co-located with the Green Plains Renewable Energy, Inc., ethanol plant in Shenandoah, Iowa.

    Author(s): Wall Street Journal
  • The bioremediation capability and efficiency of large-scale Porphyra cultivation in the removal of inorganic nitrogen and phosphorus from open sea area were studied. The study took place in 2002–2004, in a 300 ha nori farm along the Lusi coast, Qidong County, Jiangsu Province, China, where the valuable rhodophyte seaweed Porphyra yezoensis has been extensively cultivated. Nutrient concentrations were significantly reduced by the seaweed cultivation.

    During the non-cultivation period of P. yezoensis, the concentrations of NH4-N, NO2-N, NO3-N and PO4-P were 43–61, 1–3, 33–44 and 1–3 mmol L1, respectively. Within the Porphyra cultivation area, the average nutrient concentrations during the Porphyra cultivation season were 20.5, 1.1, 27.9 and 0.96 mmol L1 for NH4-N, NO2-N, NO3-N and PO4-P, respectively, significantly lower than in the non-cultivation season (po0.05). Compared with the control area, Porphyra farming resulted in the reduction of NH4-N, NO2-N, NO3-N and PO4-P by 50–94%, 42–91%, 21–38% and 42–67%, respectively.

    Nitrogen and phosphorus contents in dry Porphyra thalli harvested from the Lusi coast averaged 6.3% and 1.0%, respectively. There were significant monthly variations in tissue nitrogen content (po0.05) but not in tissue phosphorus content (p40.05). The highest tissue nitrogen content, 7.65% in dry wt, was found in December and the lowest value, 4.85%, in dry wt, in April.

    The annual biomass production of P. yezoensis was about 800 kg dry wt ha1 at the Lusi Coast in 2003–2004. An average of 14708.5 kg of tissue nitrogen and 2373.5 kg of tissue phosphorus in P. yezoensis biomass were harvested annually from 300 ha of cultivation from Lusi coastal water. These results indicated that Porphyra efficiently removed excess nutrient from nearshore eutrophic coastal areas. Therefore, large-scale cultivation of P. yezoensis could alleviate eutrophication in coastal waters economically.

    Author(s): Peimin He, Shannan Xu, Hanye Zhang, Shanshan Wen, Yongjing Dai, Senjie Lin, Charles Yarish
  • There is a pressing need to elevate the debate on the future of aquaculture and to place this in the context of other animal food production systems, including wild capture fi sheries. Between 1970 and 2008 aquaculture production grew at an annual average rate of 8.4% and remains among the fastest growing food production sectors in the world. But with global demand for aquatic food products continuing apace, there are worries about the development trajectory of aquaculture. Of particular concern for Conservation International and many others is whether and how further growth can be met in ways that do not erode biodiversity or place unacceptable demands on ecological services. In this context, the potential for aquaculture to reduce pressure on wild capture fi sheries by meeting global demand for aquatic food products is also important.

    Directed towards helping inform and stimulate policy debate, this report provides a global review and analysis of these issues for both coastal and freshwater aquaculture. Such debate is needed to help ensure that the current and future potential benefi ts of the burgeoning aquaculture sector are captured and the associated costs minimized. The report begins with an overview of the current status of world aquaculture. It then goes on to describe an approach for estimating the current combined biophysical resource demands of aquaculture for producer countries and regions. Following a comparison of these results with those available for other animal food production sectors the report then examines the consequences of likely future trends in production on the environmental impacts of aquaculture. Finally, the policy implications of the report’s fi ndings are discussed along with the research agenda that should be pursued to meet the challenge of sustainable food production.

    Author(s): Stephen J. Hall, Anne Delaporte, Michael J. Phillips, Malcolm Beveridge, Mark O’Keefe
  • Gracilaria is a commercially valuable agarophyte and its many species are distributed throughout temperate and tropical seas. Gracilaria edulis is the common agar yielding seaweed in India. The life history of Gracilaria consists of an alternation of isomorphic phase with unisexual gametophyte.

    Author(s): Jayasankar, Reeta
  • PowerPoint as PDF on our energy footprints, sustainability and aquaculture.

    Author(s): John Forster
  • The world must solve three food problems simultaneously: end hunger, double food production by 2050, and do both while drastically reducing agriculture’s damage to the environment. Five solutions, pursued together, can achieve these goals: stop agriculture from consuming more tropical land, boost the productivity of farms that have the lowest yields, raise the efficiency of water and fertilizer use worldwide, reduce per capita meat consumption and reduce waste in food production and distribution. A system for certifying foods based on how well each one delivers nutrition and food security and limits environmental and social costs would help the public choose products that push agriculture in a more sustainable direction.

    Author(s): Jonathan A. Foley
  • CARRAGEENAN IS A COMMON FOOD ADDITIVE extracted from red seaweed. For the past four decades, scientists have warned that the use of carrageenan in food is not safe. Animal studies and in-vitro studies with human cells have repeatedly shown that food-grade carrageenan* causes gastrointestinal inflammation and higher rates of intestinal lesions, ulcerations, and even malignant tumors. In fact, roughly 3,855 research papers show that carrageenan induces inflammation, most of which test the effectiveness of anti-inflammatory drugs. In the past decade, researchers have successfully identified several ways in which food-grade carrageenan causes harm. The chemical structure of carrageenan—unique chemical bondsnot found in other seaweeds or gums—affects the body in several ways. Most notably, it triggers an immune reaction, which leads to inflammation in the gastrointestinal system. Prolonged inflammation is a precursor to more serious diseases, including cancer.

  • The present Bulletin which includes catalogues of molluscs, prawns, stomatopods and marine algae is in continuation of the two earlier ones dealing with other groups in the Reference Collections of the Central Marine Fisheries Research Institute. Of the molluscs 366 species have been listed representing Gastropoda, Bivalvia and Cephalopoda. A good number of them is of interest to amateur conchologists; there is a fair representation of economically important species, and a few are rare or little known forms of scientific interest. Ninety-five prawn species are catalogued, the majority of which support the important prawn fisheries of the country. Among those included here is a number of hitherto unrecorded deep sea prawns from grounds discovered by exploratory trawling in recent years. The collection is a very valuable one for reference purposes in view of the great economic importance of this group.

    Author(s): Sundaram, K S, Sarvesan, R, Mohamed, K H, Shanbhogue, S L
  • To develop the most productive plants on earth - microalgae - to produce biofuels, nutritional oils, aquaculture and animal feeds while simultaneously reducing industrial emmissions of CO2.

    Author(s): Jeff Obbard, PhD