Alessandro Pereira Cardozo

Federal University of Rio Grande, Rio Grande do Sul, Brazil · Institute of Oceanography

This manual was created as part of the WP2 ‘New IMTA value chains and production methods’ of the H2020 All Atlantic Ocean Sustainable, Profitable and Resilient Aquaculture (ASTRAL) project. It provides detailed instructions of the cultivation technique for each of the species trialled at the ASTRAL IMTA labs. Three types of IMTA systems are include...

Different fertilization regimes in biofloc systems influence the predominance of distinct bacterial populations, impacting water quality and organism performance. This study evaluates the growth and nutrient absorption of the macroalgae Ulva lactuca when cultivated in an integrated system with Penaeus vannamei and Oreochromis niloticus in chemoauto...

Shrimp farming in the Biofloc Technology System (BFT) is already considered an alternative to the traditional culture. The bioflocs maintain the water quality and can be used as a food supplement for shrimp. The Pacific white shrimp Litopenaeus vannamei forms the basis for most of the production in BFT. However, its culture is limited by the low te...

This study focused on evaluating the effect of different concentrations of nutrients and total suspended solids on the removal rate of nutrients and biocompounds from the macroalgae U. lactuca in an integrated system with the shrimp Penaeus vannamei in biofloc. The experiment lasted 45 days and included five treatments with three replicates each, w...

Shrimp production in biofloc systems generates excess organic matter that must be removed from the system. Due to its ability to consume natural productivity, the integration of tilapia in shrimp culture could help to reduce the levels of total suspended solids in the biofloc system. The present study aimed to evaluate two stocking densities of til...

Shrimp farming in Biofloc Technology System (BFT), is already considered as an alternative to the traditional culture system. The bioflocs keep the water quality and can be used as food supplement for shrimp. Most of the production in BFT is based on the Pacific white shrimp Litopenaeus vannamei . However, its cultured is limited by the low tempera...

Results show replacement levels of 50 percent, 28 percent protein possible

In addition to environmental factors, particle size can interfere with the nitrification process because smaller flocs are less efficient in terms of ammonia and nitrite oxidation. The objective of the present study was to evaluate, in three experiments, the effect of the biofloc size on the nitrification process during the production of the white...

The aim of this study was to use preselected quality indicators for Litopenaeus vannamei post-larvae and the stable isotopes technique with δ13C and δ15N to determine the influence of bioflocs in shrimp feeding during the nursery phase, between PL1 and PL30. A control treatment (CT) with water renewal was compared to a biofloc treatment (BT) that r...

Aeration in super-intensive shrimp culture Bio oc technology systems represent a new alternative for shrimp culture. These systems utilize minimal to zero water exchange and improve water quality through the formation of a microbial community consisting of microorganisms that include bacteria, microalgae, protozoa and zooplankton. In addition to im...

The production of marine shrimp in biofloc systems has a low environmental impact; the shrimp benefit from the maintenance of water quality and possibly utilize the system’s microbial community as a food resource, which also positively affects the synthesis of digestive enzymes produced by the hepatopancreas. The aim of this study was to determine...

Aquaculture generates a large load of effluents rich in organic matter and nutrients that may be introduced into the environment. This study aimed to assess in a microcosm experiment, the effect of shrimp pond water mixed with Patos Lagoon estuary water on phytoplankton chlorophyll a and primary production, simulating two salinities. Chlorophyll a,...

water quality, phytoplankton and zooplankton were evaluated in a shrimp pond (Litopenaeus vannamei) and the adjacent Patos Lagoon estuary in summer from November/2007 to February/2008. Every two weeks, temperature, salinity, dissolved inorganic nutrients, total chlorophyll a and size fractions (>20μm; 1-20μm; <1μm) and phytoplankton and zooplankton...

Egg production in the copepod Acartia tonsa was evaluated using different densities of the microalgae Thalassiosira weissflogii, Chaetoceros muelleri and Isochrysis galbana. Male and female were kept under controlled conditions (salinity 30, 20 degrees C, photoperiod 12L:12D), acclimated to the experimental conditions and left over a period of 24 h...

The aim of this study was to evaluate the predation of Jenynsia multidentata on copepods. Increasing fish stocking density resulted in reduction in copepods density, showing copepods as an important alimentary item of J. multidentata in estuarine earthen ponds.

Litopenaeus vannamei is the most cultivated shrimp species in Brazil, being fed basically on high protein formulated diets. However, some studies have shown that the natural zooplankton found in shrimp ponds can be part of the diet of this crustacean. In this study, the zooplankton composition, density and biomass were evaluated for two shrimp pond...

Promysis orientalis is a typical mysid from the Indian and Pacific oceans and it is first recorded in waters of Patos Lagoon estuary. The occurrence of this species in the Rio Grande's Port access channel, suggests that they may have been transported in ballast water.