SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

Lavens, P.; Sorgeloos, P..

It is generally accepted, that a major constraint in the further development of marine fish and crustacean aquaculture, is the variable quality of eggs and larvae used for the hatchery-production of fry. Nonetheless, valid criteria to evaluate optimal egg quality have not been identified yet. Instead, particular indicators, are used, e.g. the fertilization and hatching rate, overall culture success during the first rearing period, etc., but these are not totally objective because hatchery-specific conditions may interfere. The biochemical composition of the egg may be one of the possible determinants of egg quality, which can be evaluated on a more objectie basis. In this respect, studied have been initiated to analyze in freshly-released eggs, the levels...

Effect of dietary essential fatty acids on egg quality and larviculture success of the greasy grouper (Epinephelus tauvina F.): preliminary results

Palavras-chave: Aquaculture techniques; Biochemical composition; Crustacean culture; Eggs; Fatty acids; Fish culture; Hatcheries; Quality control; Vitamin C.

Ano: 1991

URL: http://www.vliz.be/imisdocs/publications/262328.pdf

Dhert, P.; Lim, L.C.; Lavens, P.; Chao, T.M.; Chou, R.; Sorgeloos, P..

In spite of its aquaculture potential, the larval rearing of greasy grouper (Epinephelus tauvina) remains problematic and is not yet commercially feasible. The low and unpredictable larval survival is due to difficulties encountered in spawning the broodstock, the small size of the larvae at first feeding, and the high sensitivity of the larvae until day 45. The nutritional requirements for the broodstock as well as for the young larvae are still enigmatical. In this presentation the impact of supplementing the highly unsaturated fatty acids (HUFA), eicosapentaenoic (EPA), and docosahexaenoic acid (DHA) to the broodstock and larval diets is illustrated.

Variations in lipid classes and fatty acid content in tissues of wild Macrobrachium rosenbergii (de Man) females during maturation

Palavras-chave: Diets; Fatty acids; Fish culture; Fish eggs; Fish larvae; Nutritional requirements; Survival.

Ano: 1991

URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2852

Cavalli, R.O.; Tamtin, M.; Lavens, P.; Sorgeloos, P..

This study describes the variations in total lipid, lipid classes and fatty acids in the midgut gland (MG), ovary, and muscle tissue of wild-caught Macrobrachium rosenbergii to elucidate the importance of these components during sexual maturation. Mature females were captured in the Mae Klong River, Thailand, from July to September 1998, and divided into five groups according to their ovarian development. Total lipid levels in the ovary increased with maturation, but no concomitant decrease in MG lipids was observed. Thus, the lipid requirements of the developing ovary are thought to be more dependent on the immediate ingestion of dietary lipid than on MG reserves. Higher proportions of neutral lipids (NL), mainly triacylglycerols (TG),...

Incorporation of different fatty acids, supplied as emulsions or liposomes, in the polar and neutral lipids of Crassostrea gigas spat

Palavras-chave: Biochemical composition; Fatty acids; Lipids; Muscles; Natural populations; Ovaries; Polyunsaturated fatty acids; Prawn culture; Sexual maturity; Macrobrachium rosenbergii; Thailand.

Ano: 2001

URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=6923

Caers, M.; Coutteau, P.; Sorgeloos, P..

Pacific oysters spat (Crassostrea gigas) were fed an algal diet (Tetraselmis suecica) whether or not supplemented with emulsions or liposomes rich in 18:1n-9, 18:2n-6 and 22:6n-3. The preferential accumulation and partitioning of the latter fatty acids between the polar and neutral lipids of C. gigas spat were followed. Additionally, the efficiency of emulsions and liposomes as fatty acid carriers for C. gigas spat were compared. The incorporation of dietary fatty acids was found to vary substantially according to the fatty acid carrier (emulsions vs. liposomes), the particular fatty acid (18:1n-9,...

Advances in the enrichment of rotifers and Artemia as food sources in marine larviculture

Palavras-chave: Fatty acids; Feeding experiments; Larval development; Lipids; Liposomes; Liposomes; Oyster culture; Polyunsaturated fatty acids; Spat; Crassostrea gigas [Portuguese oyster].

Ano: 2000

URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3512

Léger, P.; Grymonpré, D.; Van Ballaer, E.; Sorgeloos, P..

A summary is given of experiments conducted regarding the enrichment of rotifers and Artemia for use as food sources marine larviculture, with particular reference to levels of omega 3-HUFA.

The effect of HUFA and vitamin C-enriched rotifers on larval growth and survival of grouper (Epinephelus suillus)

Palavras-chave: Brine shrimp culture; Crustacean culture; Fatty acids; Food organisms; Nutritive value; Artemia; Rotifera.

Ano: 1989

URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2880

Chavez, D.R.; Estenor, D.G.; Merchie, G.; Lavens, P..

Newly-hatched grouper larvae were reared for 24 days at a density of 15 larvae.l-1 in 250-l capacity cylindro-conical tanks filled with 200l seawater. Starting day 2, the larvae were given: Chlorella-fed rotifers (Chl-R) rotifers fed Culture Selco (INVE Aquaculture NV, Belgium) (CS-R), and rotifers fed Culture Selco and consequently enriched for 24h with 20% vitamin C (CSC-R). The rotifer density in the larval tanks was maintained at 15 rotifers.ml-1. The rotifer diet was supplemented with egg yolk until day 5. Each treatment had five replicates. Preliminary results show no significant difference in the survival rate of grouper larvae given Chl-R (4.21±2.8%), CS-R (2.56±0.9%) and CSC-R...

Improved larval survival at metamorphosis of Asian seabass (Lates calcarifer) using omega3-HUFA-enriched live food

Palavras-chave: Fatty acids; Feeding experiments; Growth; Larvae; Survival; Vitamin C; Chlorella; Epinephelus suillus; Rotifera.

Ano: 1995

URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2537

Dhert, P.; Lavens, P.; Duray, M.; Sorgeloos, P..

Asian seabass (Lates calcarifer) larvae were fed Brachionus cultured on Chlorella and, as soon as ingestion was possible, different types of Artemia , i.e., nauplii of the San Francisco Bay (SFB) strain, Great Salt Lake (GSL) strain or GSL nauplii that had been bioencapsulated with an emulsion containing high levels of the omega3-HUFAs (highly unsaturated fatty acids) 20:5 and 22:6. San Francisco Bay Artemia with a good natural fatty acid profile and small body size could be offered earlier than the larger but HUFA-poor Great Salt Lake strain. The poor nutritional quality of the latter, however, could be corrected by enriching the nauplii with an omega3-HUFA...

The use of lipid emulsions as carriers for essential fatty acids in bivalves: a test case with juvenile Placopecten magellanicus

Palavras-chave: Fatty acids; Feeding experiments; Food additives; Food organisms; Metamorphosis; Nutritional requirements; Polyunsaturated fatty acids; Lates calcarifer.

Ano: 1990

URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3079

Coutteau, P.; Castell, J.D.; Ackman, R.G.; Sorgeloos, P..

Although information on bivalve nutrition is still very scarce, several studies have demonstrated the importance of lipids, in particular triglycerides, as a source of energy and essential fatty acids in the early life stages. Experimental diets used so far to study bivalve nutrition either heavily pollute the water or are too complex to prepare in a hatchery. The potential use of lipid emulsions as off-the-shelf supplements was evaluated through the analytical verification of the ingestion and incorporation of n-3 highly unsaturated fatty acids (HUFA) by the juvenile sea scallop Placopecten magellanicus fed lipid emulsions of different fatty acid composition as a supplement to Isochrysis sp. (clone T-Iso). The average...

(n-3) HUFA composition of freshly spawned eggs from European seabass (Dicentrarchus labrax), seabream (Sparus aurata) and red seabream (Pagrus major) collected in different hatcheries

Palavras-chave: Emulsions; Fatty acids; Lipids; Placopecten magellanicus [sea scallop].

Ano: 1996

URL: http://www.vliz.be/imisdocs/publications/2934.pdf

Komis, A.; Léger, P.; Sorgeloos, P..

The biochemical composition of fish eggs is often used as an indicator for assessing the nutritional requirements of aquaculture species during their larval stages. Fatty acids of the (n-3) HUFA type have proven to play a critical role in providing good growth, survival and stress resistance in marine fish larvae. Hence, analyzing these fatty acids in fish eggs may provide interesting data on the requirements for those essential nutrients. By comparing the analyses of wild versus broodstock fish eggs differences may appear, possibly explaining differences in egg quality. Intra-spawning-season differences may further appear by following fatty acid profiles in the course of time. Finally, the influence of broodstock nutritionon egg composition may be another...

HUFA levels in eggs of wild and cultured broodstock of Macrobrachium rosenbergii

Palavras-chave: Comparative studies; Fatty acids; Fish culture; Fish eggs; Hatcheries; Induced breeding; Dicentrarchus labrax [Bass]; Pagrus major; Sparus aurata [Gilthead].

Ano: 1991

URL: http://www.vliz.be/imisdocs/publications/262325.pdf

Lavens, P.; Piyatiratitivorakul, S.; Menasveta, P.; Sorgeloos, P..

The variation in egg quality, i.e. the potential of the egg to produce viable fry, is still a limiting factor in the commercial production of marine fish and crustacean fry. Better knowledge in this field would contribute to improved and especially more consistent hatchery outputs and to the development of more suitable broodstock diets. So far, objective criteria to evaluate egg quality are scarce. However, it is very likely that the nutrient composition of the eggs may be a good indicator for egg viability as it reflects the nutrient demands of the developing embryo and larva. Since (n-3) highly unsaturated fatty acids (HUFAs) have been identified as essential nutrients for the larvae of marine fish, shrimp and prawn a case study has been initiated with...

Nutritional and lipid profiles of the dorsal and ventral muscles of wild pirarucu

Palavras-chave: Biochemical composition; Brood stocks; Comparative studies; Eggs; Fatty acids; Prawn culture; Shrimp culture; Macrobrachium rosenbergii.

Ano: 1991

URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2876

Cortegano,Carlos Andre Amaringo; Godoy,Leandro Cesar de; Petenuci,Maria Eugênia; Visentainer,Jesuí Vergílio; Affonso,Elizabeth Gusmão; Gonçalves,Ligia Uribe.

Abstract: The objective of this work was to analyze the proximate and fatty acid composition of the dorsal and ventral muscles of wild pirarucu (Arapaima gigas) captured from a Brazilian Amazonian lake. Dorsal and ventral muscles were dissected out, freeze-dried, vacuum-packed, and had the proximate and fatty acid composition analyzed. Ash, total proteins, and lipids were inversely proportional to moisture and had higher levels in the ventral muscles. Twenty-seven fatty acids were quantified in both muscles without significant differences between them, except for the heneicosylic, palmitoleic, γ-linolenic, and dihomo-γ-linolenic acids. Saturated and monounsaturated fatty acids were predominant in both muscles. The eicosapentaenoic (EPA) and docosahexaenoic...

Meat lipid profile of steers finished in pearl millet pasture with different rates of concentrate

Palavras-chave: Arapaima gigas; Fatty acids; Flesh lipid quality; N-3 Hufa; N-3/n-6; Nutraceutical fish.

Ano: 2017

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000400271

Menezes,Luis Fernando Glasenapp de; Segabinazzi,Luciane Rumpel; Restle,João; Freitas,Leandro da Silva; Brondani,Ivan Luiz; Silveira,Magali Floriano da; Pacheco,Rangel Fernandes; Paula,Perla Cordeiro de; Joner,Guilherme.

The objective of this work was to evaluate the meat lipid profile from Devon beef steers finished in pearl millet (Pennisetum americanum) pasture and fed at different rates of concentrate supplementary diet. Twelve steers weighing 270 kg, at 12‑month‑average initial age, were randomly distributed into three treatments: pearl millet pasture; and pearl millet pasture plus a concentrate equivalent at 0.5 or 1.0% of body weight, with two replicates. Total contents of saturated and unsaturated fatty acids, the polyunsaturated:saturated ratio and other relevant fatty acids as the vaccenic acid, conjugated linoleic acid, omega‑3, and omega‑6 were not affected by the consumption of a concentrate supplement at 0.5 or 1.0% live weight. However, the 0.5%...

Relationship among phenotypic and quality traits in indigenous and exotic accessions of linseed

Palavras-chave: Pennisetum americanum; Conjugated linoleic acids; Fatty acids; Omega‑3; Tropic pasture; Wheat bran.

Ano: 2013

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013000500012

Siddiqui,Ameena; Shukla,Sudhir; Rastogi,Anu; Bhargava,Atul; Niranjan,Abhishek; Lehri,Alok.

Abstract: The objective of this work was to evaluate the relationship among phenotypic and quality traits in a set of indigenous and exotic accessions of linseed (Linum usitatissimum). The experimental material consisted of 151 accessions of linseed belonging to landraces and cultivars collected from diverse agroecological zones. Five randomly chosen plants of each accession in each replicate were tagged, and data were recorded for the 12 following agronomic traits: days to flowering, days to maturity, plant weight, plant height, tillers per plant, secondary branches per plant, capsules per plant, seeds per capsule, 1,000 seed weight, harvest index, seed yield per plant, and oil content. Capsules per plant, harvest index, and plant weight played a direct...

Grain filling and fatty acid composition of safflower fertilized with integrated nitrogen fertilizer and biofertilizers

Palavras-chave: Linum usitatissimum; Correlation; Fatty acids; Genetic advance; Heritability; Path analysis.

Ano: 2016

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2016001201964

Sharifi,Raouf Seyed; Namvar,Ali; Sharifi,Reza Seyed.

Abstract: The objective of this work was to evaluate the effects of the integrated application of nitrogen fertilizer and biofertilizers on the yield, grain filling period, and composition of fatty acids of safflower (Carthamus tinctorius). Split-plot experiments were carried out during the 2011 and 2012 crop seasons. The treatments consisted of seed inoculation with plant growth-promoting rhizobacteria (Azotobacter chroococcum strain 5, Azospirillum lipoferum strain F, and Pseudomonas putida strain 186) in the subplots, including a control without seed inoculation; and of the application of N fertilizer at different rates (60, 120, and 180 kg ha-1 urea) in the main plots, including a control without N. The highest grain yield, grain filling period, and...

Chemical composition and fatty acid contents in farmed freshwater prawns

Palavras-chave: Carthamus tinctorius; Pseudomonas putida; Oil quality; PGPR; Fatty acids; Seed-inoculation..

Ano: 2017

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000400236