Search results for: Pascal Divanach

Items from 1 to 20 out of 33 results

article

Temperature influences growth, digestive system ontogeny and lipids deposition in the liver in gilthead seabream (Sparus aurata) larvae and juveniles

Paulo H. de Mello, Pascal Divanach, Ioannis E. Papadakis

Aquaculture Research > 53 > 9 > 3416 - 3429

The effects of three temperatures (16°C, 19°C and 22°C) during the seabream larval rearing period (60 days) were studied in terms of growth (total length, T.L.), the ontogeny of the digestive system and lipid deposition in the liver (area covered with lipid vacuoles, ACLV%). The trials were performed in duplicate for each treatment. Seabream eggs were stocked (100 eggs L⁻¹) in each 500‐L tank. The...

article

Ontogeny of the eye of meagre (Argyrosomus regius) from hatching to juvenile and implications to commercial larval rearing

Ioannis E. Papadakis, Maroudio Kentouri, Pascal Divanach, Constantinos C. Mylonas

Aquaculture > 2018 > 484 > C > 32-43

The histological development of the visual system of meagre (Argyrosomus regius) was studied from hatching to juvenile stage (44days post hatching, dph), under aquaculture rearing conditions. The cones, horizontal, bipolar, amacrine and ganglia cells appeared already at 3dph at a total body length (TL) of 3.11±0.21mm, at the stage of mouth opening. Rods appeared at 6dph (TL 4.16±0.73mm) and increased...

article

Nonlinear responses to waterborne cadmium exposure in zebrafish. An in vivo study

Elisavet A. Renieri, Dimitris G. Sfakianakis, Athanasios A. Alegakis, Irina V. Safenkova, more

Environmental Research > 2017 > 157 > C > 173-181

Cadmium (Cd) has proved to be associated with numerous toxic effects in aquatic organisms via waterborne exposure. With a view to investigate Cd toxicity along a broad spectrum of exposures reaching from environmental to toxic, we employed adult zebrafish (Danio rerio) for an in vivo study. A number of 10 fish per tank were placed in 40L tanks and were exposed for 30 days to 0.0, 5.0, 25, 50, 75,...

article

Behaviour of European sea bass, Dicentrarchus labrax L., in cages – impact of early life rearing conditions and management

Nikos Papandroulakis, Konstandia Lika, Tore S Kristiansen, Frode Oppedal, more

Aquaculture Research > 45 > 9 > 1545 - 1558

European sea bass, Dicentrarchus labrax L., groups reared under different conditions during larval stages (mesocosm and intensive rearing) were monitored during on‐growing in sea cages until marketable size (350–400 g). Four caged groups were followed for a period of 17 months each at a pilot scale farm, where vertical distribution behaviour was monitored. This was performed while fish were under...

article

Consumption rates and digestibility of four food items by the marine gastropod Charonia seguenzae (Aradas & Benoit, 1870)

Chrisa K. Doxa, Pascal Divanach, Maroudio Kentouri

Journal of Experimental Marine Biology and Ecology > 2013 > 446 > Complete > 10-16

Consumption and digestibility rates of four food items (sea star: Luidia sarcii and Astropecten aranciacus, squid: Nototodarus sloanii, shrimp: Parapenaeus longirostris and fish: Boops boops) by the marine gastropod Charonia seguenzae were studied. The food with the greatest mean daily consumption in wet weight was the sea star with 24.03±2.69g, followed by fish (11.36±3.74g), shrimp (9.52±1.21g)...

article

Ontogeny of the digestive system of meagre Argyrosomus regius reared in a mesocosm, and quantitative changes of lipids in the liver from hatching to juvenile

Ioannis E. Papadakis, Maroudio Kentouri, Pascal Divanach, Constantinos C. Mylonas

Aquaculture > 2013 > 388-391 > Complete > 76-88

Histological development of the digestive system was studied in association with feeding preferences in meagre (Argyrosomus regius) from hatching to juvenile (44days after hatching, dah), using a mesocosm system. In addition, the liver lipid content was evaluated using histological methods (area covered with lipid vacuoles, ACLV%). The ontogeny of the digestive system was completed by 19dah (or 444degree...

article

Antibacterial activity in microalgae cultures

Foteini Kokou, Pavlos Makridis, Maroudio Kentouri, Pascal Divanach

Aquaculture Research > 43 > 10 > 1520 - 1527

Five cultures of microalgae (Chlorella minutissima, Tetraselmis chui, Nannochloropsis sp., Arthrospira platensis and Isochrysis sp.) with no culturable bacteria were tested for their ability to inhibit the growth of six Vibrio bacterial strains (V. parahaemolyticus, V. anguillarum, V. splendidus, V. scophthalmi, V. alginolyticus andV. lentus). The influence of light on the antibacterial activity of...

article

Quantitative and Qualitative Aspects of Bacterial Communities Associated with Cultures of Chlorella minutissima

Pavlos Makridis, Tania Ferreira, Fotini Kokou, Costas S. Tsigenopoulos, more

Journal of the World Aquaculture Society > 43 > 4 > 571 - 578

Microbiological conditions in 200 L cultures of microalgae Chlorella minutissima in polyethylene sleeves were examined. The influence of addition of antibiotic (nitrofurantoin) was studied. Samples were taken 2, 5, 9, and 14 d after inoculation and were spread on solid Zobell medium and on thiosulfate citrate bile salts sucrose agar for the enumeration of total numbers of bacteria and numbers of presumptive...

article

Effect of protein and lipid dietary levels on the growth of juvenile meagre (Argyrosomus regius)

Stavros Chatzifotis, Maria Panagiotidou, Pascal Divanach

Aquaculture International > 2012 > 20 > 1 > 91-98

This study investigates the effects of dietary lipid and protein levels in the growth, feed utilization and body composition of meagre (Argyrosomus regius). Triplicate groups of juvenile fish (23.4 ± 4.9 g average weight ± SD) were fed four isolipidic diets (17.5% crude lipids) containing 40, 45, 50 and 54% of protein, while in a separate experiment, fish (21.8 ± 3.7 g average weight ± SD) were fed...

article

Semi‐continuous mass culture of rotifers (Brachionus plicatilis) using an automatic feeder

Venetia Kostopoulou, Manolis Vasilakis, Pascal Divanach

Aquaculture Research > 43 > 1 > 91 - 98

This study describes the rotifer mass culture protocol developed at the Institute of Aquaculture (HCMR) in Crete. Rotifers were cultured semi‐continuously at a density of 257.6 ± 2.6 ind. mL⁻¹, with a daily dilution rate of 25%. An automatic feeder was used to administer dry feed (Selco Sparkle^®) every 10 min. A number of factors were investigated so as to provide an in‐depth analysis of the advantages...

article

Effect of feeding delay after self‐feeder activation on growth performance and feeding behaviour of red porgy (Pagrus pagrus L. 1758): application to submergible cages with surface hopper

Chrisa K Doxa, Ioannis E Papadakis, Pascal Divanach, Maroudio Kentouri

Aquaculture Research > 42 > 11 > 1623 - 1631

Red porgies (Pagrus pagrus) of 20.6±1.5 g mean weight were reared in tanks under four delayed self‐feeding conditions (0=control, 7, 30 and 90 s) after rod activation. The time intervals were chosen to simulate the time taken for a commercial pelleted feed to transit the tube linking a surface‐mounted feed hopper and the depth at which a cage might be submerged. Daily feeding rate, growth, food conversion...

article

Enteromyxum leei (Myxozoa), a Lethal Intruder of Tropical Pet Fish: First Case in Humphead Wrasse, Cheilinus undulatus (Rüppell, 1835)

Pantelis Katharios, Giorgos Rigos, Pascal Divanach

Journal of Exotic Pet Medicine > 2011 > 20 > 2 > 138-143

The lethal effect of enteromyxosis is recorded for the first time in the humphead wrasse, Cheilinus undulatus, a tropical pet fish. Enteromyxosis was caused by the myxosporean parasite Enteromyxum leei, and the gut was the only tissue affected in this case. Severe enteritis and degeneration of the intestinal mucosa may have caused a digestive function disorder, thereby resulting in the fish's death...

article

The use of biochemical, sensorial and chromaticity attributes as indicators of postmortem changes in commercial‐size, cultured red porgy Pagrus pagrus, stored on ice

George Vardanis, Liliana Sfichi‐Duke, Lluis Tort, Pascal Divanach, more

Aquaculture Research > 42 > 3 > 341 - 350

The freshness of red porgy slaughtered in ice slurry and stored in melting ice was evaluated instrumentally, biochemically and sensorialy. Additionally, postmortem skin colour changes were monitored, in an attempt to demonstrate the use of chromaticity parameters as a reliable and convenient approach to quality assessment. Dielectric properties showed a statistically significant decrease (P<0.05)...

article

Dietary supplementation of mannan oligosaccharide on white sea bream (Diplodus sargus L.) larvae: effects on development, gut morphology and salinity tolerance

Arkadios Dimitroglou, Simon J Davies, John Sweetman, Pascal Divanach, more

Aquaculture Research > 41 > 9 > e245 - e251

The influence of dietary mannan oligosaccharide (MOS) on the development, gut integrity and quality (in respect of stamina and survivability) of white sea bream Diplodus sargus L. larvae was investigated. White sea bream larvae were held under appropriate rearing conditions and fed Artemia, enriched by A1 DHA Selco^™ with the addition or absence of MOS (Bio‐Mos®). The results indicated that larval...

article

Harvesting Chlorella minutissima using cell coagulants

Aikaterini Papazi, Pavlos Makridis, Pascal Divanach

Journal of Applied Phycology > 2010 > 22 > 3 > 349-355

Twelve salts were tested for their ability to coagulate microalgae cells in cultures of Chlorella minutissima. The final aim was to develop an easy and efficient approach for harvesting microalgae biomass in dense cultures. Aluminum, ferric, and zinc salts coagulated C. minutissima cultures, while optimum concentration was 0.75 and 0.5 g L⁻¹ for sulfate and chloride salts, respectively. Aluminum salts...

article

Histological evaluation of the elimination of Artemia nauplii from larval rearing protocols on the digestive system ontogeny of shi drum (Umbrina cirrosa L.)

Ioannis E. Papadakis, Mario M. Zaiss, Yiannos Kyriakou, Georgios Georgiou, more

Aquaculture > 2009 > 286 > 1-2 > 45-52

The influence of the absence of Artemia nauplii from larval diet protocols on growth and digestive system ontogeny was studied using histological techniques in the shi drum (Umbrina cirrosa). One group of larvae was reared using the standard intensive rearing protocol, which offers a combination of enriched rotifers (Brachionus plicatilis), Artemia spp. nauplii and artificial diet (Std-group). Another...

article

Effect of dietary taurine supplementation on growth performance and bile salt activated lipase activity of common dentex, Dentex dentex, fed a fish meal/soy protein concentrate-based diet

Stavros Chatzifotis, Irene Polemitou, Pascal Divanach, Efthimia Antonopoulou

Aquaculture > 2008 > 275 > 1-4 > 201-208

Common dentex were fed three isoprotein and isoenergetic diets to investigate the effect of partial substitution of fish meal by soy protein concentrate (0 [FM], 25 [SM25] and 40% [SM40]) in the presence or absence of taurine (T) supplementation (2 g kg ⁻¹ on a dry weight basis) [FM+T], [SM25+T] and [SM40+T], on growth related parameters, muscle composition and bile salt activated lipase activity...

article

Weaning of greater amberjack (Seriola dumerilii Risso 1810) juveniles from moist to dry pellet

Ioannis E. Papadakis, Stavros Chatzifotis, Pascal Divanach, Maroudio Kentouri

Aquaculture International > 2008 > 16 > 1 > 13-25

The weaning of greater amberjack (Seriola dumerilii Risso 1810) to a dry diet was studied in two consecutive experiments. The experimental fish were hatchery-produced and grown to their initial size on a soft pellet containing 50% trash fish and 50% commercial dry pellet. In the first experiment, three homogenous groups of greater amberjacks (n = 153, mean weight: 374 ± 43 g), initially adapted for...

article

Ontogeny of the digestive tract in shi drum (Umbrina cirrosa L.) reared using the mesocosm larval rearing system

Mario M. Zaiss, Ioannis E. Papadakis, Eric Maingot, Pascal Divanach, more

Aquaculture > 2006 > 260 > 1-4 > 357-368

Histological changes of the digestive tract were studied in shi drum (Umbrina cirrosa) from hatching until 41 days post hatching (dph), when the fry had a mean (±S.D.) total length (TL) of 32±2 mm and wet weight (WW) of 0.42±0.07 g. Larvae were reared using the mesocosm technique, the most natural among commercially employed rearing methods for marine larvae. Shi drum opened their mouth at 2 dph (2...

article

Treatment of Microcotyle sp. (Monogenea) on the gills of cage-cultured red porgy, Pagrus pagrus following baths with formalin and mebendazole

Pantelis Katharios, Nikos Papandroulakis, Pascal Divanach

Aquaculture > 2006 > 251 > 2-4 > 167-171

Two bath treatment trials for the control of the monogenean Microcotyle sp. in the gills of cultured red porgy, Pagrus pagrus using formalin (200 ppm for 1 h) and mebendazole (400 ppm for 1 h) were conducted. Formalin was very effective removing all the parasites from the gills of the infected fish while mebendazole produced no significant result. Based on the results of the trial, formalin was selected...

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INFONA - science communication portal

Search results for: Pascal Divanach

Temperature influences growth, digestive system ontogeny and lipids deposition in the liver in gilthead seabream (Sparus aurata) larvae and juveniles

Ontogeny of the eye of meagre (Argyrosomus regius) from hatching to juvenile and implications to commercial larval rearing

Nonlinear responses to waterborne cadmium exposure in zebrafish. An in vivo study

Behaviour of European sea bass, Dicentrarchus labrax L., in cages – impact of early life rearing conditions and management

Consumption rates and digestibility of four food items by the marine gastropod Charonia seguenzae (Aradas & Benoit, 1870)

Ontogeny of the digestive system of meagre Argyrosomus regius reared in a mesocosm, and quantitative changes of lipids in the liver from hatching to juvenile

Antibacterial activity in microalgae cultures

Quantitative and Qualitative Aspects of Bacterial Communities Associated with Cultures of Chlorella minutissima

Effect of protein and lipid dietary levels on the growth of juvenile meagre (Argyrosomus regius)

Semi‐continuous mass culture of rotifers (Brachionus plicatilis) using an automatic feeder

Effect of feeding delay after self‐feeder activation on growth performance and feeding behaviour of red porgy (Pagrus pagrus L. 1758): application to submergible cages with surface hopper

Enteromyxum leei (Myxozoa), a Lethal Intruder of Tropical Pet Fish: First Case in Humphead Wrasse, Cheilinus undulatus (Rüppell, 1835)

The use of biochemical, sensorial and chromaticity attributes as indicators of postmortem changes in commercial‐size, cultured red porgy Pagrus pagrus, stored on ice

Dietary supplementation of mannan oligosaccharide on white sea bream (Diplodus sargus L.) larvae: effects on development, gut morphology and salinity tolerance

Harvesting Chlorella minutissima using cell coagulants

Histological evaluation of the elimination of Artemia nauplii from larval rearing protocols on the digestive system ontogeny of shi drum (Umbrina cirrosa L.)

Effect of dietary taurine supplementation on growth performance and bile salt activated lipase activity of common dentex, Dentex dentex, fed a fish meal/soy protein concentrate-based diet

Weaning of greater amberjack (Seriola dumerilii Risso 1810) juveniles from moist to dry pellet

Ontogeny of the digestive tract in shi drum (Umbrina cirrosa L.) reared using the mesocosm larval rearing system

Treatment of Microcotyle sp. (Monogenea) on the gills of cage-cultured red porgy, Pagrus pagrus following baths with formalin and mebendazole

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