7 documents found, page 1 of 1

Understanding the individual role of fish, oyster, phytoplankton and macroalgae...

In order to demonstrate that IMTA can be profitable and a good alternative to regular semi-intensive fish mariculture production in earthen ponds three different production treatments with distinct combinations of trophic levels were designed: (i) a combination of fish, filter feeders, phytoplankton and macroalgae, (ii) fish, filter feeders and phytoplankton and (iii) fish, phytoplankton and macroalgae, to eval...

Methodology for assessing the individual role of fish, oyster, phytoplankton an...

Production costs in extensive and semi-intensive fish culture in earthen ponds are often too high to offer sustainable economic activity due to the low productivity of these systems. The right combination of commercial finfish species with inorganic (primary producers) and organic extractive (bivalves) species in Integrated MultiTrophic Aquaculture (IMTA) create a balanced system with higher profitability and r...

Composition and bioaccessibility of elements in green seaweeds from fish pond a...

The elemental composition of five species of green seaweeds (Chaetomorpha linum, Rhizoclonium riparium, Ulva intestinalis, Ulva lactuca, Ulva prolifera) grown in fish pond aquaculture systems were studied. The elemental bioaccessibility in these species was also investigated through the application of an innovative in vitro digestive model of the human gastrointestinal tract. It was observed that R. riparium ha...

Acoustic detection of bubbles in a pond covered by the seagrass Cymodocea nodosa

This paper describes two experiments conducted in a pond covered by the seagrass Cymodocea nodosa at the Aquaculture Research Station of the Portuguese Institute for the Sea and Atmosphere in Olhao, Portugal, aiming at developing acoustic methods to assess oxygen production of seagrasses. The first experiment was carried out in July covering two days, when warm water and high photosynthetic rates give a high pr...

Larval and juvenile development of dusky grouper Epinephelus marginatus reared ...

The larval development of the dusky grouper Epinephelus marginatus up to the benthic juvenile stage is described in detail to establish a reference for their larval identification. Development is described in terms of ontogenetic changes in morphology, growth, pigmentation, fin structure and skeletal structure. Larvae were reared in mesocosms at a mean temperature of 24·3◦ C, salinity of 36·5, dissolved oxygen ...

Fish larval performance fed with copepods (Acartia grani) and the dinoflagellat...

Rearing fish larvae for extensive and semi-intensive aquaculture - the “natural...

Non-intensive aquaculture systems are rapidly generating interest due to increased awareness of consumers about environmental issues, including those associated with coastal areas; eutrophication as a result of intensive aquaculture production is seen as a problem, there is concern about animal welfare issues in fish rearing, and food safety is of course a major concern.