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Atlantic Cod Actively Avoid CO2 and Predator Odour, Even After Long-term CO2 Exposure
The rising atmospheric CO2 level is continuously driving the dissolution of more CO2 into the oceans, and some emission scenarios project that the surface waters may reach 1000 ?atm by the end of the century, write Fredrik Jutfelt and Maria Hedgärde,...
Dietary Potassium Diformate (KDF) Improves Performance of Milkfish from Mariculture in the Philippines
The milkfish is the most important cultured fish species in the Philippines. In 2011, almost 373,000 t milkfish were produced there (FAO, 2013), around 42% of its entire world production, write Christian Lückstädt, Kai-Jens Kühlmann and Karsten Schroeder,...
Harmful Effects on Toxin Dinoflagellates in Shrimp Culture Ponds
Phytoplankton are the key food item in both aquaculture and mariculture. Both systems are utilizing phytoplankton as food for the animals being farmed. In aquaculture, phytoplankton must be obtained and developed artificially through various adapted procedures,...
Flatfish Conditioning for Stock Enhancement
For stock enhancement, the ideal end product is an individual that can survive in the wild until maturity. Conditioning fish for stock enhancement can increase survival and recapture rates, writes Michelle L. Walsh, University of New Hampshire. Taken...
Evaluation of Growth Performance, Feed Utilization Efficiency and Survival Rate of Juvenile Nile Tilapia, Reared at Different Water Temperature
Kassaye Balkew Workagegn, Hawassa University, Ethiopia, conducted this study to investigate the growth performance, feed utilization efficiency and survival rate of juvenile Oreochromis niloticus reared in aquaria at different water temperature....
Elevated CO2 Affects Embryonic Development and Larval Phototaxis in a Temperate Marine Fish
As an effect of anthropogenic CO2 emissions, the chemistry of the world’s oceans is changing. Understanding how this will affect marine organisms and ecosystems are critical in predicting the impacts of this ongoing ocean acidi?cation, write Elisabet...
Salt Stratification Determines the Fate of Fish Stocks in the Baltic Sea
In the Baltic Sea, two cod stocks evolve independently. Also the juveniles of two economically important flatfish species, flounder and plaice, live there within limited space. This is possibly due to the irregular distribution of water masses of different...
Effect of Different Sources and Levels of Some Dietary Biological Additives on:III- Body Composition of Nile Tilapia Fish
In part three of three, A.M. Abdelhamid, Mansoura University, Egypt, aims to investigate the effect of dietary graded levels of Aqua Superzyme, Garlen Allicin, and Diamond V (Original XPC) on the chemical composition and histology of all-males mono-sex...
Developing Ultraviolet Illumination of Gillnets as a Method to Reduce Sea Turtle Bycatch
Fisheries bycatch of marine animals has been linked to population declines of multiple species, including many sea turtles. John Wang et al, University of Hawaii, examined the effectiveness of illuminating gillnets with ultraviolet (UV) light-emitting...
Early Exposure of Bay Scallops to High CO2 Causes a Decrease in Larval Shell Growth
Ocean acidification has a variable impact on the growth and survival of marine invertebrates. Larval stages are thought to be particularly vulnerable to environmental stressors, and negative impacts of ocean acidification have been seen on fertilization...
Gambia Fisheries Sector: Trade, Value Addition and Social Inclusiveness - with a Focus on Women
This report from the United Nations conference on trade and development looks at trade, value addition and social inclusiveness in the Gambian fisheries sector, with a focus on women....
Effect of Different Sources and Levels of Some Dietary Biological Additives on: II- Feed Utilization by Nile Tilapia Fish
In part two of three, A.M. Abdelhamid, Mansoura University, Egypt, aims to investigate the effect of dietary graded levels of Aqua Superzyme, Garlen Allicin, and Diamond V (Original XPC) on feed utilization by Nile tilapia fish for 16 weeks. ...
Strategic Review of African Aquaculture Feeds
Sub-Saharan Africa (SSA) aquaculture production needs to grow by 270 per cent to satiate fish demand. In order to meet this demand, many factors have to be considered. This paper, written by Lee Cocker and commissioned by NEPAD through the University...
Influence of Food Supply on the Response of Olympia Oyster Larvae to Ocean Acidification
Increases in atmospheric carbon dioxide drive accompanying changes in the marine carbonate system as carbon dioxide enters seawater and alters ocean pH. As such changes do not occur in isolation, and other environmental factors have the potential to modulate...
Adjusting Water Discharge Can Boost Salmon Productivity
By adjusting water discharges in ways designed to boost salmon productivity, officials at a dam in central Washington were able to more than triple the numbers of juvenile salmon downstream of the dam over a 30-year period, according to a study published...
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