PROJET REGIONAL MEDITERRANEEN DE DEVELOPPEMENT DE L'AQUACULTURE
MEDITERRANEAN REGIONAL AQUACULTURE PROJECT
TECHNICS USED FOR INTENSIVE REARING AND ALIMENTATION OF FISH AND SHELLFISH

Contents


Villanova di Motta di Livenza - ITALIA - Vol. II


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Contents

COASTAL FISHCULTURE IN THE UPPER ADRIATIC

INTENSIVE REARING OF SEA-BASS (Dicentrarchus labrax) AND GILTHEAD SEA-BREAM (Sparus aurata) IN RACEWAYS

1.   GENERALITES

1.1.   Warm waters - cold waters

1.2.   The three phases in rearing

1.3.   The different types of tanks

2.   REARING

2.1.   Rearing programme - stock management

2.1.1.   Nursery

2.1.2.   First fattening - Fattening

2.2.   Water management - Temperature

2.2.1.   The oxygen consumption in the tanks

2.2.2.   The gassy ammonia rate

2.2.3.   Other physico-chemical parameters

2.2.4.   Hydraulic aspects

2.2.5.   Usual values

2.3.   Feed

2.3.1.   Generalities

2.3.1.1.   Ration calculation

2.3.1.2.   Formulation balance - Appetency

2.3.2.   Dry or wet food

2.3.2.1.   Dry food

2.3.2.2.   Wet food

3.   THE REARING FARM IN GRAVELINES

3.1.   Introduction

3.2.   Design of the farm

3.3.   Description of the farm

3.3.1.   The water circuits

3.3.2.   The rearing units

3.3.3.   Annex equipment

3.4.   Running of the farm - First results

3.4.1.   General characteristics

3.4.2.   First results

3.5.   Future perspectives

INTENSIVE FISHCULTURE - ITTICA UGENTE S.P.A TORRE MOZZE DI UGENTO - LECCE

INTENSIVE REARING OF EEL

INTENSIVE REARING OF MULLET

LIST OF FIGURES

Fig.1.Specific characteristics of the different species of mullet.
Fig.2.Growth curve of mullet in extensive valliculture.
Fig.3.Curves obtained for the different species of mullet depending on whether the semi-intensive or intensive method was employed.
Fig.4.Comparison between the survival percentages obtained in intensive and extensive rearing (first year) of the different species reared in valliculture.
Fig.5.“Pond” ecosystem diagram; the principal factors
Fig.6.Ponderal increase of M. cephalus mullet reared while diets of different proteinic content were employed.
Fig,7.Ponderal increase of O + fed mullet while diets of different proteinic content were employed.
Fig.8.Comparison between the ponderal increases of the different species of mullet (fry) reared while diets of different proteinic and glucidic content were employed.
Fig.9.Composition of the different diets employed in the experiment described in fig.8.
Fig.10.Graph attesting the waste percentage of the food given to mullet depending on the size of the particles (above) and the percentage of use of proteins also depending on the size of the particles of food (below).
Fig.11.Experimental data of a trial in the aim of verifying the efficiency of the filtration system of mullet.
Fig.12.Table of the results (average value) of the tests illustrated in fig.11.
Fig.13.Data of a trial in the aim of verifying the influence of the systems of the food distribution on the increase and conversion index.
Fig.14.Distribution of prey frequency for mullet depending on their size.
Fig.15.Idem fig. 14 but for L. ramada captured in sea water environments.
Fig.16.Idem fig. 14 but for L. ramada captured in fresh water environments.
Fig.17.Idem fig. 14 but for L. ramada captured at the outlet of an intensive facility for sea-bass.

TROPHIC COMMUNITY CORRELATIONS IN FERTILIZED PONDS FOR THE COMMERCIAL CULTURE OF THE KURUMA PRAWN Penaeus japonicus Bate IN THE NORTH ADRIATIC SEA
(North-East Coast of Italy)

CAPTIONS

Fig. 1.Map of the Venetian Lagoon, showing the Locations of Valle SPARESERA (I) and Valle FOSSE (2).
Fig. 2.Planimetric map of Valle SPARESSERA showing the ponds used for the production experiment. The arrows indicate the direction of water flow caused by the tide and pumping system.
Fig. 3.Schedule for the pond fertilization program (ponds A, B, C, D, E, F) throughout the whole experiment, from pond preparation to just before harvesting.
Fig. 4.Nutrient content measurements at the moment ponds D was fertilized in Valle SPARESERA. The arrows indicate the dates on which the fertilizations were carried out.
Fig. 5.Nutrient content measurements in Valle FOSSE. The arrows, left, indicate the sole date on which fertilization was effected (organic + inorganic)
Fig. 6.Water temperature readings in pond D in Valle SPARESERA.
Fig. 7.Histogram of the phyto and zoo-planktonic biomasses given in wet weight, with corresponding chlorophyll a curve in a Valle SPARESERA. It also shows the qualitative composition of the most representative species of the community.
Fig. 8.Histogram of the phyto and zoo-planktonic biomasses given in wet weight, with corresponding chlorophyll a curve in Valle FOSSE. It also shows the qualitative composition of the most representative species of the community.
Fig. 9.Transparency curves of the water in pond D in Valle SPARESERA and pond F in Valle FOSSE using the SECCHI disk. The arrows indicate the dates of Fertilization; the last arrow, right, (coloured white ), shows the final fertilization, which was not applied to pond D.
Fig. 10.Histograms of the macrobenthonic biomasses given in wet weight in pond D, Valle SPARESERA, and pond F, Valle FOSSE; The qualitative composition of the main zoological groups are given for these biocenoses. The curves express the fractions of the biomasses actually used by the penaeids, namely, annelids, crustaceans and insects taken together, and the soft parts of the mollusks that they are able to attack (Hydrobia sp and others), and the Cerastoderma glaucum under 3 mm in size.
Fig. 11.Curves showing the weight increases of the populations of Penaeus japonicus in pond D and F in the Valle SPARESERA and Valle FOSSE, respectively.

NEW REARING TECHNIQUES AND LARVAE QUALITY IMPROVEMENTS IN SEA-BASS (Dicentrarchus labrax) HATCHERIES

POST LARVAE PRODUCTION OF P. JAPONICUS INCREASE IN PRODUCTIVITY BY MODIFYING THE FEED SEQUENCE

INDUSTRIAL MANUFACTURE OF COMPOUND FOOD FOR MARINE SPECIES

FEEDING PRINCIPLES FOR MARINE FISH UNDER INTENSIVE CULTURE

MARINE FISH FEED

QUALITY CONTROL OF FEED IN PISCICULTURE

PATHOLOGICAL ASPECTS OF INTENSIVE REARING