Emmanouil E Malandrakis

Agricultural University of Athens · Faculty of Animal Science

Glutathione peroxidase (GPx; EC 1.11.1.9) is an important family of enzymes that protects organisms from oxidative damage. Four full-length GPx cDNAs were cloned and characterized by rapid amplification of cDNA ends polymerase chain reaction (RACE-PCR) from the liver of gilthead sea bream (Sparus aurata), an economically important species for Medit...

The present study was applied to evaluate the effects of alternate feeding and feed restriction on gene expression, growth, proximate composition and biochemical indices in European seabass, Dicentrarchus labrax. Fish were randomly divided into six indoor tanks with 90 fish per tank in a recirculating aquaculture system. Two feeding strategies were...

The red porgy (Pagrus pagrus) and the common dentex (Dentex dentex) are Sparidae species of high commercial value, traded in the Greek market. In some cases, fish species identification from Greek fisheries is difficult for the consumer due to the strong morphological similarities with their imported counterparts or closely related species such as...

The red porgy (Pagrus pagrus) and the common dentex (Dentex dentex) are Sparidae species of high commercial value, traded in the Greek market. In some cases, fish species identification from Greek fisheries is difficult for the consumer due to the strong morphological similarities with their imported counterparts or closely related species such as...

In farmed flatfish, such as common sole, color disturbances are common. Dyschromia is a general term that includes the color defects on the blind and ocular sides of the fish. The purpose was to examine the difference in gene expression between normal pigmented and juveniles who present ambicoloration. The analysis was carried out with next-generat...

Aquaculture industries are expanding worldwide and control of Cryptosporidium is of great importance. Cryptosporidiosis is a serious waterborne/foodborne disease, responsible for infectious outbreaks globally. Current knowledge on the Cryptosporidium species in the aquatic environment and their occurrence in piscine hosts is steadily increasing sin...

A major challenge in fish physiology is to understand the mechanisms underlying the transcriptomic responses of fish brain to food deprivation. Differential gene expression analysis identified in total 2240 transcripts that presented >2-fold change (adjusted p < 0.01) between each treatment and the control group (C). The identity of the transcripts...

Two feeding trials were conducted to examine the replacement of fishmeal (FM) by hydrolyzed feather meal (HFM) in the diet of juvenile gilthead sea bream (Sparus aurata). In trial I (100 days), three isonitrogenous (500 g kg−1 crude protein) and isoenergetic (21 kJ kg−1) diets were formulated, where FM protein was replaced by HFM at 50% (HFM50) and...

In sole aquaculture production, consistency in the quality of produced eggs throughout the year is unpredictable. Hox genes have a crucial role in controlling embryonic development and their genetic variation could alter the phenotype dramatically. In teleosts genome duplication led paralog hox genes to become diverged. Direct association of polymo...

Background: Comprehensively detailed information on population dynamics for benthic species is crucial since potential admixture of individuals could shift the genetic subdivision and age structure during a full breeding period. The apparent genetic impact of the potential recruitment strategy of Norway lobster Nephrops norvegicus is still under re...

Common sole (Solea solea) aquaculture production is based mostly on wild-caught breeders. Recently, the successful reproduction of first-generation fish that were reared in captivity was accomplished. A consistent good quality and quantity of produced eggs throughout the year, and of next-generation broodstock, is important for reducing the overall...

Two feeding trials examined the replacement of fishmeal (FM) with poultry by‐product meal (PBM) in the diet of juvenile Sparus aurata. In Feeding trial I (100 days), three diets were formulated, where FM protein was replaced by 50% (PBM50) and 100% (PBM100) PBM, while in Feeding trial II (110 days), four diets were formulated using the same FM cont...

Seagrasses are a unique taxonomic rank of Plantae, totally submerged to marine environment. They evolved from terrestrial plants so this progression provoked alterations in genome, providing adaptation abilities to aquatic environment. The development of high-throughput technologies, such as omics, bridges the gap between genome and phenotype, shed...

Lymphocystis disease virus (LCDV) is the causative agent of a well-known fish viral disease that is characterized by hypertrophy of fibroblastic cells in the connective tissue. In intensive aquaculture systems, the prevalence of LCDV infection is very high causing significant economic losses. Despite the fact that horizontal and vertical transmissi...

Seagrasses exhibit vital ecological roles in the marine environment. Nevertheless, the genomic resources available for seagrasses are still scarce. In the present study, the transcriptome of Cymodocea nodosa was sequenced with a view to study the molecular mechanisms underlying abiotic stress responses. The sequenced transcriptome for the species w...

Anaesthetic properties and potential genotoxicity of six essential oils extracted from the medicinal plants Origanum vulgare, Eugenia aromatica, Aloysia triphylla, Melaleuca alternifolia, Juniperus communis, Cinnamomum zeylanicum, are presently assessed in gilthead seabream. Essential oils are an alternative option for fish anaesthesia, which is ne...

Many organisms accomplish faster growth after a period of total or partial starvation, compared with others that receive food normally, a phenomenon known as “growth compensation”. This particular phenomenon, is of great interest as fish feed increases production cost in the aquaculture industry. Two different groups of sea breams (in triplicates)...

Botrytis cinerea is a ubiquitous fungus difficult to control because it possess a variety of attack modes, diverse hosts as inoculum sources, and it can survive as mycelia and/or conidia or for extended periods as sclerotia in crop debris. For these reasons the use of any single control measure is unlikely to succeed and a combination of cultural p...

Myxozoans are metazoan parasites which are highly pathogenic in commercially important fish, particularly in aquaculture. Enteromyxosis is an economically significant disease caused by the myxosporean parasite Enteromyxum leei. Presently, early diagnosis of enteromyxosis in sharpsnout seabream was achieved by monitoring fish on a time-scale schedul...

Growth and variation in size of turbot and sole larvae originating from different genetic sources were compared at different stocking densities, including genetically based information that might lead to a better knowledge of heterogeneity in cultivated populations. There was no effect of density on growth rate in either species. However, between t...

##Assembly-Data-START## Sequencing Technology :: Sanger dideoxy sequencing ##Assembly-Data-END##

##Assembly-Data-START## Sequencing Technology :: Sanger dideoxy sequencing ##Assembly-Data-END##

Heavy metals represent one of the most serious environmental hazards concerning aquatic organisms, including both wild and reared ones, while they affect the public health through the food chain. This review summarizes the mechanisms by which heavy metals act at molecular level, with a view to treat the aquatic environment. Genotoxicity has been pr...

Green water technique was developed in order to improve survival and growth rate of post hatched gilthead seabream (Sparus aurata) larvae intensively produced. In parallel, this created the need of algal cultivation in hatcheries, a fact that elaborated complicated procedures and increased the cost of larval production. Recently, world aquaculture,...

The reproductive biology of female Norway lobster Nephrops norvegicus was studied throughout an annual cycle from January to December 2007 in Pagasitikos Gulf, a large semi-enclosed Gulf in the central west Aegean Sea, in Greece. Six ovarian maturation stages were described to follow gonadal development, based on the combined external observation a...

The aim of this study was to assess the efficacy of Toyocerin®, a probiotic containing 1×109 Bacillus toyoi spores per gram, on the health status and productivity of sows and their litters. Eighty gilts and sows were allocated into four experimental groups as follows: TOYO-0 = control, TOYO-0.5 = 0.5×109 Bacillus toyoi spores/kg of feed, TOYO - 1 =...