Publications

TitleAbstractYear(sorted descending)
Filter
PMID
Filter
the tongue dorsal surface in fish: a comparison among three farmed species.the oral cavity of vertebrates has a very important role in many functions strictly related to the food processing. two species, sea bass dicentrarchus labrax and seabream sparus aurata, are mainly involved in the aquaculture industry in the mediterranean area; moreover, the white seabream diplodus sargus sargus was recently chosen as the best candidate for the diversification of species of commercial interest. this investigation was carried out, using the standard procedures for light and scann ...201727990675
diel activity and variability in habitat use of white sea bream in a temperate marine protected area.fish populations are often comprised of individuals that use habitats and associated resources in different ways. we placed sonic transmitters in, and tracked movements of, white sea bream (diplodus sargus sargus) in the no-take zone of a mediterranean marine protected area: the torre guaceto marine protected area, (adriatic sea, italy). tagged fish displayed three types of diel activity patterns in three different habitats: sand, rocky reefs and "matte" of the seagrass posidonia oceanica. indiv ...201626922044
unveiling the neurotoxicity of methylmercury in fish (diplodus sargus) through a regional morphometric analysis of brain and swimming behavior assessment.the current study aims to shed light on the neurotoxicity of mehg in fish (white seabream - diplodus sargus) by the combined assessment of: (i) mehg toxicokinetics in the brain, (ii) brain morphometry (volume and number of neurons plus glial cells in specific brain regions) and (iii) fish swimming behavior (endpoints associated with the motor performance and the fear/anxiety-like status). fish were surveyed for all the components after 7 (e7) and 14 (e14) days of dietary exposure to mehg (8.7μgg ...201627780124
ordinary and extraordinary movement behaviour of small resident fish within a mediterranean marine protected area.it is important to account for the movement behaviour of fishes when designing effective marine protected areas (mpas). fish movements occur across different spatial and temporal scales and understanding the variety of movements is essential to make correct management decisions. this study describes in detail the movement patterns of an economically and commercially important species, diplodus sargus, within a well-enforced mediterranean mpa. we monitored horizontal and vertical movements of 41 ...201627437692
movements of diplodus sargus (sparidae) within a portuguese coastal marine protected area: are they really protected?mark-recapture tagging and acoustic telemetry were used to study the movements of diplodus sargus within the pessegueiro island no-take marine protected area (mpa), (portugal) and assess its size adequacy for this species' protection against fishing activities. therefore, 894 diplodus sargus were captured and marked with conventional plastic t-bar tags. at the same time, 19 d. sargus were tagged with acoustic transmitters and monitored by 20 automatic acoustic receivers inside the no-take mpa fo ...201626794495
molecular characterization and transcriptional regulation by gh and gnrh of insulin-like growth factors i and ii in white seabream (diplodus sargus).insulin-like growth factors (igf) i and ii are key regulators of development, growth and reproduction in fish. in the present study we have cloned and characterized the cdna and genomic sequences of igf-i and igf-ii in the white seabream (diplodus sargus). the igf1 and igf2 genes were encoded putatively by five and four exons, respectively. moreover, the 5'-flanking upstream region of the igf1 gene contained highly conserved regulatory elements including hnf-1α, hnf-3β, ccaat/enhancer binding pr ...201626706220
inorganic mercury accumulation in brain following waterborne exposure elicits a deficit on the number of brain cells and impairs swimming behavior in fish (white seabream-diplodus sargus).the current study contributes to fill the knowledge gap on the neurotoxicity of inorganic mercury (ihg) in fish through the implementation of a combined evaluation of brain morphometric alterations (volume and total number of neurons plus glial cells in specific regions of the brain) and swimming behavior (endpoints related with the motor activity and mood/anxiety-like status). white seabream (diplodus sargus) was exposed to realistic levels of ihg in water (2μgl(-1)) during 7 (e7) and 14 days ( ...201626688460
biochemical biomarker responses to pollution in selected sentinel organisms across the eastern mediterranean and the black sea.pollution effects were assessed by means of biochemical biomarkers (catalase, glutathione s-transferase and acetylcholinesterase activities, and metallothioneins content) in five species at selected coastal sites across the eastern mediterranean and the black sea. the mussel mytilus galloprovincialis, a well-established sentinel species, was investigated in the adriatic sea, aegean sea, and black sea. the mussel brachidontes pharaonis and the striped red mullet mullus surmuletus were used in the ...201626396017
prebiotics effect on immune and hepatic oxidative status and gut morphology of white sea bream (diplodus sargus).the aim of this study was to evaluate the effects of short-chain fructooligosaccharides (scfos), xylooligosaccharides (xos) and galactooligosaccharides (gos) on immune and hepatic oxidative status, and gut morphology of white sea bream juveniles. four diets were formulated: a control diet with fish meal (fm) and plant feedstuffs (pf) (30fm:70pf) and three test diets similar to the control but supplemented with 1% of scfos, xos or gos. dietary prebiotic incorporation did not affect total blood ce ...201626802896
1h nmr spectroscopy and mva analysis of diplodus sargus eating the exotic pest caulerpa cylindracea.the green alga caulerpa cylindracea is a non-autochthonous and invasive species that is severely affecting the native communities in the mediterranean sea. recent researches show that the native edible fish diplodus sargus actively feeds on this alga and cellular and physiological alterations have been related to the novel alimentary habits. the complex effects of such a trophic exposure to the invasive pest are still poorly understood. here we report on the metabolic profiles of plasma from d. ...201526058009
a new page on the road book of inorganic mercury in fish body - tissue distribution and elimination following waterborne exposure and post-exposure periods.there are several aspects of inorganic mercury (ihg) toxicokinetics in fish that remain undeveloped despite its environmental ubiquity, bioaccumulation capacity and toxicity. thus, this study presents new information on the uptake, distribution and accumulation of ihg following water contamination by adopting a novel set of body compartments (gills, eye wall, lens, blood, liver, brain and bile) of the white sea bream (diplodus sargus) over 14 days of exposure. realistic levels of ihg in water (2 ...201525677695
population dynamics of two diplectanid species (monogenea) parasitising sparid hosts (sparidae).economically important sparid fish species, gilthead (sparus aurata) and white seabream (diplodus sargus) (sparidae) are frequently parasitised by diplectanid monogeneans, known to induce severe losses in farming conditions. we have analysed population dynamic of two diplectanid species, lamellodiscus echeneis and lamellodiscus ignoratus (monogenea: diplectanidae) collected from two bream species in the beymelek lagoon (southwest coast of turkey), comparing it between different host variables (f ...201525563608
cholecystokinin: how many functions? observations in seabreams.a short overview on the regional distribution of the gastro-intestinal peptide hormone cholecystokin (cck) in fish is presented. in particular, the results of molecular and immunological studies on seabreams, diplodus puntazzo and diplodus sargus, are reported, which, by demonstrating cck in the hindgut, open new questions regarding the functional role of this hormone in that part of the intestine. the putative involvement of hindgut cck in the feedback control of digestive processes was tested ...201424631546
could molecular effects of caulerpa racemosa metabolites modulate the impact on fish populations of diplodus sargus?the green alga caulerpa racemosa is a non-native, invasive species in the mediterranean, and an important stressor for several native organisms. the algal capacity to produce secondary metabolites has been suggested to modulate success of the c. racemosa invasion, although many of potentially involved biological pathways still remain unexplored. in this respect, the aim of the present study was to investigate some molecular and cellular effects in the white seabream diplodus sargus, an ecologica ...201424582326
contrasting fish behavior in artificial seascapes with implications for resources conservation.artificial reefs are used by many fisheries managers as a tool to mitigate the impact of fisheries on coastal fish communities by providing new habitat for many exploited fish species. however, the comparison between the behavior of wild fish inhabiting either natural or artificial habitats has received less attention. thus the spatio-temporal patterns of fish that establish their home range in one habitat or the other and their consequences of intra-population differentiation on life-history re ...201323935978
a coupled biogeochemical-dynamic energy budget model as a tool for managing fish production ponds.the sustainability of semi-intensive aquaculture relies on management practices that simultaneously improve production efficiency and minimize the environmental impacts of this activity. the purpose of the present work was to develop a mathematical model that reproduced the dynamics of a semi-intensive fish earth pond, to simulate different management scenarios for optimizing fish production. the modeling approach consisted of coupling a biogeochemical model that simulated the dynamics of the el ...201323872182
influence of temperature in thermal and oxidative stress responses in estuarine fish.the influence of increasing temperatures in thermal and oxidative stress responses were studied in the muscle of several estuarine fish species (diplodus vulgaris, diplodus sargus, dicentrarchus labrax, gobius niger and liza ramada). selected fish were collected in july at the tagus estuary (24±0.9°c; salinity of 30±4‰; ph=8). fish were subjected to a temperature increase of 1°c.h(-1) until they reached their critical thermal maximum (ctmax), starting at 24°c (control temperature). muscle sample ...201323774589
the hypothalamo-hypophyseal system of the white seabream diplodus sargus: immunocytochemical identification of arginine-vasotocin, isotocin, melanin-concentrating hormone and corticotropin-releasing factor.the distribution of the neurosecretory hormones vasotocin, isotocin and melanin-concentrating hormone and the hypophysiotropic hormone corticotropin-releasing factor was studied in the hypothalamo-hypophyseal system of the white seabream (diplodus sargus) using immunocytochemical techniques. magnocellular and parvocellular perikarya immunoreactive for arginine-vasotocin and isotocin were present in the nucleus preopticus. perikarya immunoreactive for arginine-vasotocin extended more caudally wit ...201312005029
the 5s rdna high dynamism in diplodus sargus is a transposon-mediated mechanism. comparison with other multigene families and sparidae species.there has been considerable discussion in recent years on the evolution of the tandemly repeated multigene families, since some organisms show a concerted model whereas others show a birth-and-death model. this controversial subject extends to several species of fish. in this study, three species of the sparidae family (pagrus pagrus, p. auriga and diplodus sargus) and an interspecific hybrid (p. pagrus (♀) × p. auriga (♂)) have been studied at both molecular and cytogenetic level, taking three ...201323355010
effect of guar gum on glucose and lipid metabolism in white sea bream diplodus sargus.the aim of this study was to assess the role of soluble non-starch polysaccharide (guar gum) on white sea bream diplodus sargus, glucose and lipid metabolism. a control diet was formulated to contain 40 % crude protein, 14 % crude lipids and 35 % pregelatinized maize starch, and three other diets were formulated similar to the control diet except for guar gum, which was included at 4 % (diet gg4), 8 % (diet gg8) or 12 % (diet gg12). diets were fed to the fish for 9 weeks on a pair-feeding scheme ...201322763699
cholecystokinin in white sea bream: molecular cloning, regional expression, and immunohistochemical localization in the gut after feeding and fasting.the peptide hormone cholecystokinin (cck), secreted by the midgut, plays a key role in digestive physiology of vertebrates including teleosts, by stimulating pancreatic secretion, gut motility, and gallbladder contraction, as well as by delaying gastric emptying. moreover, cck is involved in the regulation of food intake and satiation. secretion of cck by the hindgut is controversial, and its biological activity remains to be elucidated. the present paper addresses the regional distribution of i ...201223285038
glycemic and insulin responses in white sea bream diplodus sargus, after intraperitoneal administration of glucose.a glucose tolerance test was performed in white sea bream diplodus sargus, juveniles to evaluate the effect of a glucose load on plasma glucose, insulin, triacylglyceride levels, and on liver glycogen storage in order to study the capability of glucose utilization by this species. after being fasted for 48 h, fish were intraperitoneally injected with either 1 g of glucose per kg body weight or a saline solution. plasma glucose rose from a basal level of 4 to a peak of 18-19 mmol l(-1), 2-4 h aft ...201221830035
dispersal patterns of coastal fish: implications for designing networks of marine protected areas.information about dispersal scales of fish at various life history stages is critical for successful design of networks of marine protected areas, but is lacking for most species and regions. otolith chemistry provides an opportunity to investigate dispersal patterns at a number of life history stages. our aim was to assess patterns of larval and post-settlement (i.e. between settlement and recruitment) dispersal at two different spatial scales in a mediterranean coastal fish (i.e. white sea bre ...201222355388
seasonal changes in phosphorus content of fish tissue as they relate to diets of renal patients.to investigate seasonal variations in tissue phosphorus (p) levels, p to protein ratio, and p to omega-3 fatty acid (ω3-fa) ratio in 2 species of fish that are commonly consumed in lebanon. we aim to determine suitability for dietary management of renal patients.201221741860
subtle effects of biological invasions: cellular and physiological responses of fish eating the exotic pest caulerpa racemosa.the green alga caulerpa racemosa var. cylindracea has invaded mediterranean seabed including marine reserves, modifying the structure of habitats and altering the distributional patterns of associated organisms. however, the understanding of how such invasion can potentially affect functional properties of mediterranean subtidal systems is yet to be determined. in this study, we show that c. racemosa changes foraging habit of the native white seabream, diplodus sargus. in invaded areas, we found ...201222701707
hydroxybenzoate paralytic shellfish toxins induce transient gst activity depletion and chromosomal damage in white seabream (diplodus sargus).fish are routinely exposed to harmful algal blooms that produce noxious compounds and impact the marine food web. this study investigates the role of phase i and ii detoxification enzymes on metabolism of the novel paralytic shellfish toxins (psts), the hydroxybenzoate analogues recently discovered in gymnodinium catenatum strains, in the liver of white seabream, assessing ethoxyresorufin-o-deethylase (erod) and glutathione s-transferase (gst) activities. additionally, the genotoxic potential of ...201222710085
assessing dispersal patterns of fish propagules from an effective mediterranean marine protected area.successfully enforced marine protected areas (mpas) have been widely demonstrated to allow, within their boundaries, the recovery of exploited species and beyond their boundaries, the spillover of juvenile and adult fish. little evidence is available about the so-called 'recruitment subsidy', the augmented production of propagules (i.e. eggs and larvae) due to the increased abundance of large-sized spawners hosted within effective mpas. once emitted, propagules can be locally retained and/or exp ...201223284887
biotransformation modulation and genotoxicity in white seabream upon exposure to paralytic shellfish toxins produced by gymnodinium catenatum.fish are recurrently exposed to paralytic shellfish toxins (psts) produced by gymnodinium catenatum. nevertheless, the knowledge regarding metabolism of psts and their toxic effects in fish is scarce. consequently, the current study aims to investigate the role of phase i and ii detoxification enzymes on pst metabolism in the liver of white seabream (diplodus sargus), assessing ethoxyresorufin-o-deethylase (erod) and glutathione s-transferase (gst) activities. moreover, the genotoxic potential o ...201222057254
patterns of variability in early-life traits of fishes depend on spatial scale of analysis.estimates of early-life traits of fishes (e.g. pelagic larval duration (pld) and spawning date) are essential for investigating and assessing patterns of population connectivity. such estimates are available for a large number of both tropical and temperate fish species, but few studies have assessed their variability in space, especially across multiple scales. the present study, where a mediterranean fish (i.e. the white seabream diplodus sargus sargus) was used as a model, shows that spawning ...201121247943
determination and assessment of total mercury levels in local, frozen and canned fish in lebanon.fish is an important constituent of the lebanese diet. however, very little attention in our area is given to bring awareness regarding the effect of the toxicity of mercury (hg) mainly through fish consumption. this study aimed to report analytical data on total mercury levels in several fish species for the first time in thirty years and to also made individuals aware of the presence and danger from exposure to mercury through fish consumption. fish samples were selected from local lebanese ma ...201122432295
changes in the soluble bone proteome of reared white seabream (diplodus sargus) with skeletal deformities.one of the main constrains for commercial aquaculture production of white seabream (diplodus sargus) is the high incidence of skeletal malformations in reared fish. the purpose of this study was to obtain a better understanding of the mechanisms involved in the development of these types of skeletal malformations by comparative proteomic analysis of the vertebral column of normal and deformed fish using 2de for protein separation and ms for protein identification. we observed a 3.2 and 3.4-fold ...201120435535
genetic differences between wild and hatchery populations of diplodus sargus and d. vulgaris inferred from rapd markers: implications for production and restocking programs design.restocking and stock enhancement programs are now recognized as an important tool for the management of fishery resources. it is important, however, to have an adequate knowledge on the genetic population structure of both the released stock and the wild population before carrying out such programs. in this study, random amplified polymorphic dna (rapd) markers were applied to assess genetic diversity and population structure of wild and hatchery populations of the white seabream diplodus sargus ...201020145302
quantifying recreational shore angling catch and harvest in southern portugal (north-east atlantic ocean): implications for conservation and integrated fisheries management.recreational shore fishing along 250 km of the south and south-west coast of portugal was studied based on roving creel and aerial surveys. surveys were conducted between august 2006 and july 2007, following a stratified random-sampling design and provided information on catch and effort, harvest and discards, angler demographics and fishing habits. overall, 192 roving creel surveys, 24 aerial surveys and 1321 interviews were conducted. based on the aerial surveys, a mean +/-s.e. total fishing e ...201020557660
morphological and molecular studies on life cycle stages of diphtherostomum brusinae (digenea: zoogonidae) from northern portugal.diphtherostomum brusinae was first recorded by the present study in the north of portugal. sporocysts, containing cercariae and encysted metacercariae, were observed in the gonads and digestive gland of the gastropod nassarius reticulatus. metacercariae were also found infecting the foot, mantle border and gills of the cockle cerastoderma edule. the adult form was lodged in the rectum of the definitive host diplodus sargus. the morphology of the three parasitic stages was studied by light (lm) a ...200919265558
sauvagine/urotensin i-like immunoreactivity in the caudal neurosecretory system of a seawater fish diplodus sargus l. in normal and hyposmotic milieu.we report the presence of sauvagine/urotensin i-like immunoreactive (sv/ui-li) elements in the caudal neurosecretory system of a teleost (diplodus sargus l.) collected from aquaria tanks of the aquaculture center (talassographic institut of cnr) of messina or maintained in an hyposmotic milieu for different periods. in normal specimens, sv/ui-li material was recognizable in discrete or little amounts both in dahlgren cell cytoplasm and in their axons that reach the urophysis. on the contrary, th ...20092755877
new records of rare derogenids (digenea: hemiuroidea) from mediterranean sparids, including the description of a new species of magnibursatus naidenova, 1969 and redescription of derogenes adriaticus nikolaeva, 1966.records of derogenid digeneans in the mediterranean and black sea region are scarce and tend to be restricted to a small number of host-groups, but especially to sparid fishes. this work reports on the presence of derogenine and halipegine derogenids from two sparids, diplodus annularis (l.) and d. sargus (l.), from off the mediterranean coast of spain. five derogenid forms were recovered. derogenes adriaticus nikolaeva, 1966 is redescribed from diplodus annularis, and derogenes sp. is described ...200919789999
organochlorine bioaccumulation and biomarkers levels in culture and wild white seabream (diplodus sargus).persistent organic pollutants (pops), which can accumulate in the adipose fish tissues, can enter the human food chain through the consumption of fish, and cause risk to health. the use of chemical analysis, and biochemical and cellular responses is a way to detect the impact of pollutants in aquatic systems. the purpose of this study was to investigate the levels of organochlorine compounds (polychlorinated biphenyls - pcb and p,p'-dichlorodiphenyltrichloroethane and its metabolites - tddt) in, ...200818789475
metal accumulation and oxidative stress responses in, cultured and wild, white seabream from northwest atlantic.metals are environmentally ubiquitous and can be found at high concentrations in seawater and subsequently in marine organisms. metals with high redox potential can trigger oxidative stress mechanisms with damaging effects in biological tissues. in aquatic species, oxidative stress has been evaluated by assessing antioxidant enzymes activities and oxidative damages in tissues. the purpose of this study was to evaluate oxidative stress biomarkers and metal residues in white seabream (diplodus sar ...200818783819
characterization of eight microsatellite markers in the white sea bream, diplodus sargus (teleostei, sparidae).the white sea bream, diplodus sargus (teleostei, sparidae), is a species with a high commercial importance in mediterranean aquaculture. there is currently little information available about the genetic characteristics of cultured populations. in this survey, we have developed eight polymorphic microsatellites for the white sea bream using an enriched genome library protocol. all of them were polymorphic in the 67 individuals tested, 32 of which were wild specimens, and 35 were individuals from ...200821586024
metabolism of tryptophan, methionine and arginine in diplodus sargus larvae fed rotifers: effect of amino acid supplementation.dietary amino acids imbalances have been described when fish larvae are fed rotifers, what may lead to a reduction in growth rate. the tube-feeding technique can be used to assess the effect of free amino acid short term supplementation. in this study supplementation of tryptophan, methionine and arginine were tested in diplodus sargus. single crystalline (14)c amino acids as well as a mix of (14)c amino acids were used as tracers to compare results of individual amino acids metabolism with the ...200818204926
ultrastructural study of the pituicytes in the pituitary gland of the teleost diplodus sargus.an electron microscopic study was performed on the pituitary gland of the mediterranean teleost fish diplodus sargus to analyse the morphological characteristics of the pituicytes. in this class of vertebrates, the pituicytes have, like other astroglial cells, a trophic and support function, but they may also play an active role in the release of neurohormones. most of the pituicytes were of the dark type. their shape appeared irregular with long, thin processes protruding from the cellular body ...200818158107
lipid and fatty acid content in wild white seabream (diplodus sargus) broodstock at different stages of the reproductive cycle.the lipid and fatty acid content of the gonads, liver and muscle of wild white seabream males and females was studied at different stages of the reproductive cycle. samples were taken from mature white seabream at pre-spawning (november), mid-spawning (march) and post-spawning (june) stages. the results showed that lipid accumulates in gonads and muscle from november to march. the gonadosomatic index (gsi) was also increased during this period. male gonads showed a greater increase in polar lipi ...200717157047
relationships among predatory fish, sea urchins and barrens in mediterranean rocky reefs across a latitudinal gradient.previous studies conducted on a local scale emphasised the potential of trophic cascades in mediterranean rocky reefs (involving predatory fish, sea urchins and macroalgae) in affecting the transition between benthic communities dominated by erected macroalgae and barrens (i.e., bare rock with partial cover of encrusting algae). distribution patterns of fish predators of sea urchins (diplodus sargus sargus, diplodus vulgaris, coris julis and thalassoma pavo), sea urchins (paracentrotus lividus a ...200717034843
metacercariae of galactosomum lacteum (jägerskiöld, 1896) looss, 1899 (heterophyidae) from marine teleosts in the gulf of cagliari (southern sardinia, italy).galactosomum lacteum (jägerskiöld, 1896) looss, 1899 metacercariae, encysted on the optic nerve, on the brain and/or on the muscle and the connective of the pharynx and oesophagus, were found in spicara maena l., s. flexuosa rafinesque, 1810, s. smaris l. (centracanthidae), gobius cruentatus gmelin, 1789 (gobiidae), symphodus tinca l., s. mediterraneus l. (labridae), serranus cabrilla l. (serranidae), diplodus sargus l. and d. annularis l. (sparidae) caught in the gulf of cagliari (southern sard ...200718021465
organochlorine compounds (pcbs, pcdds and pcdfs) in seafish and seafood from the spanish atlantic southwest coast.concentrations and congener specific profiles of pcdd/fs and pcbs were determined in edible fish and seafood species from the coast of huelva, in the spanish southwest atlantic coast. five fish species, namely wegde sole (dicologoglossa cuneata), common sole (solea vulgaris), white seabream (diplodus sargus), sardine (sardina pilchardus), angler fish (lophius piscatorius), two shellfish species (donax trunculus and chamelea gallina), common cuttlefish (sepia officinalis) and prawns (parapenaeus ...200616483635
life-history- and ecosystem-driven variation in composition and residence pattern of seabream species (perciformes: sparidae) in two mediterranean coastal lagoons.species composition and length-frequency distributions of six sparid fish species were investigated in two central mediterranean coastal lagoons off the western coast of italy: fogliano and caprolace. in the former, the sparid fauna was dominated by the gilt-head seabream (sparus aurata), whereas in caprolace, species composition was more homogeneous across all six species. size structure varied considerably among species: s. aurata, diplodus puntazzo and diplodus vulgaris had a single-cohort st ...200616266729
[lamellodiscus sanfilippoi n. sp. (monogenea, diplectanidae) parasite from the gills of diplodus sargus (teleostei, sparidae) in mediterranean sea].lamellodiscus sanfilippoi n. sp. takes place, among the other species of lamellodiscus, in the "ergensi" sub-group (amine et euzet, 2005) characterized by the morphology of the dorsal lateral bars of the haptor. this sub-group comprises, in the mediterranean, l. ergensi euzet and oliver, 1966, l. kechemirae amine and euzet, 2005, l. tomentosus amine and euzet, 2005, all parasite of diplodus sargus, and l. baeri oliver, 1974 parasite of pagrus pagrus. l. sanfilippoi can be distinguished from the ...200616605066
distribution patterns of macrobenthic species in relation to organic enrichment within aquaculture earthen ponds.the relationship between organic enrichment and macrobenthic colonization patterns was investigated during an 8-month period in diplodus sargus (white seabream) production ponds. a stratified sampling design was applied and each pond was divided into three zones: water entrance (we); central (c); and automatic feeder zones (af). generally, the number of species and shannon-wiener diversity increased from the we to the af zone. abundance did not present a clear trend. the recently developed marin ...200617070856
marine reserves reestablish lost predatory interactions and cause community changes in rocky reefs.in the last decades, marine reserves have dramatically increased in number worldwide. here i examined the potential of no-take marine reserves to reestablish lost predatory interactions and, in turn, cause community-wide changes in mediterranean rocky reefs. protected locations supported higher density and size of the most effective fish preying on sea urchins (the sea breams diplodus sargus and d. vulgaris) than unprotected locations. density of sea urchins (paracentrotus lividus and arbacia li ...200616826995
description de deux nouvelles espèces de lamellodiscus johnston & tiegs, 1922 (monogenea: diplectanidae) du groupe morphologique 'ignoratus', parasites de diplodus sargus et d. vulgaris (teleostei: sparidae).the study of the diplectanid gill parasites of diplodus rafinesque (teleostei: sparidae) from off the algerian coast revealed the presence of several species of lamellodiscus johnston & tiegs, 1922 on d. sargus (linnaeus) and d. vulgaris (geoffroy saint-hilaire). some of these species differ from the others by having a copulatory organ "en lyre" and lamellodiscs of the morphological group 'ignoratus' of oliver (1987). in lamellodiscus, the subgroup 'ignoratus', proposed by amine & euzet (2005), ...200616612661
evaluating the effects of protection on fish predators and sea urchins in shallow artificial rocky habitats: a case study in the northern adriatic sea.man-made defence structures (e.g., breakwaters, jetties) are becoming common features of marine coastal landscapes all around the world. the ecology of assemblages of species associated with such artificial structures is, however, poorly known. in this study, we evaluated the density and size of fish predators of echinoids (i.e., diplodus sargus, diplodus vulgaris, sparus aurata), and the density of sea urchins (i.e., paracentrotus lividus) at defence structures (i.e., breakwaters) inside and ou ...200515589985
the atlantic-mediterranean transition: discordant genetic patterns in two seabream species, diplodus puntazzo (cetti) and diplodus sargus (l.).sparids are a group of demersal perciform fish of high commercial value, which have experienced an extensive radiation, particularly in the mediterranean, where they occupy a variety of different niches. the present study focuses on two species: diplodus sargus and d. puntazzo, presenting a wide distribution from the mediterranean to the eastern atlantic coasts. they display similar ecological behaviour and are evolutionary closely related. both are highly appreciated in fisheries and d. puntazz ...200515936957
changes in lipid class and fatty acid composition during development in white seabream (diplodus sargus) eggs and larvae.to establish the changes which occur during embryogenesis and early larvae development, eggs, yolk-sac larvae (one day old larvae) and absorbed yolk-sac larvae (three day old larvae) of white sea bream were examined for lipid class and fatty acid composition. the development was characterized by a decrease in all lipid classes with the exception of phosphatidylserine (ps) and fatty free acids (ffa) which increased, and sphingomyelin (sm) which remained unchanged. the changes observed in lipid cl ...200415465667
redescriptions of magnibursatus blennii (paggi & orechhia, 1975) n. comb. and arnola microcirrus (vlasenko, 1931) (digenea: derogenidae) from marine teleosts off corsica.two species of halipegine derogenids are redescribed in detail from marine fishes off corsica. following a study of specimens from blennies off corsica and museum material, tyrrhenia paggi & orecchia, 1975 is considered to be a synonym of magnibursatus naidenova, 1969, and its type-species, t blennii paggi & orecchia, 1975, is transferred to the latter genus as m. blennii (paggi & orecchia, 1975) n. comb. m. blennii differs from all species of magnibursatus in possessing suckers of a similar siz ...200415449828
evidence of genetic selection for growth in new recruits of a marine fish.abstract a cohort of diplodus sargus, a coastal marine fish abundant in the mediterranean sea, has been surveyed from its settlement following the pelagic larval stage up to 4 months of age, when the juveniles are moving to adult habitats in order to assess selective processes. we followed the mortality by looking at the decrease in population abundance and, simultaneously, the genetic structure using allozymes and the growth associated with each genotype to test for a relationship between genot ...200415189225
lipid and fatty acid composition of muscle and liver from wild and captive mature female broodstocks of white seabream, diplodus sargus.total lipids (tl), lipid classes, and their associated fatty acids from muscle and liver of captive and wild mature female broodstocks were investigated in order to estimate the fatty acid requirements of white seabream (diplodus sargus). the results showed that the percentage of triacylglycerol was higher in liver and muscle of captive fish than in wild fish. the distribution of phospholipid classes in liver and muscle of both fish groups was similar, phosphatidylcholine, phosphatidylethanolami ...200415142540
morphology, fine structure, biochemistry, and function of the spermatic ducts in marine fish.the spermatic ducts and the testicular efferent ducts were investigated in different marine teleost fish species (diplodus sargus, mullus barbatus, thalassoma pavo, trachinus draco, uranuscopus scaber, sparisoma cretense, synodon saurus). from the morphological, histological, fine structural and biochemical investigations it appeared that the testicular main ducts and spermatic ducts of the investigated marine fish have the following functions: storage of spermatozoa, monosacharide synthesis for ...200314517103
organogenesis of the digestive tract in the white seabream, diplodus sargus. histological and histochemical approaches.the ontogeny of the digestive tract of the white seabream, diplodus sargus during the larval development up to day 45 post-hatching (dph) has been studied using histological and histochemical techniques. the oesophageal goblet cells appeared around 6 dph and contained neutral and acid mucosubstances (pas/diastase-pas and alcian blue ph 2.5 positive reactions). an incipient stomach can be distinguished from 2 dph but the first sign of gastric gland development was detected around 13-15 dph, incre ...200312973683
demographic and genetic structures of white sea bream populations (diplodus sargus, linnaeus, 1758) inside and outside a mediterranean marine reserve.we studied the white sea bream (diplodus sargus), a protandrous hermaphroditic fish, in two protected and unprotected areas in southwestern france. we observed a significant difference in the demographic structure between the two areas. females were present in two different age distributions inside and outside the marine reserve with younger females outside. this suggests plasticity in the age of sexual inversion in the case of an exploited population. genetic differentiation was weak and appare ...200314608695
diplodus sargus interrenal-pituitary response: chemical communication in stressed fish.in the present study the response of white sea-bream (diplodus sargus), used as experimental model, to different stocking densities was tested to assess whether the induced stress conditions were able to activate a chemical communication. once a good recovery was evident, six days after capture and transportation, experiments started to evaluate eventual changes in cortisol plasma levels as well as in both plasma and pituitary alpha-melanocyte stimulating hormone (alpha-msh) levels. these studie ...200212161203
[heterozygosity and selective value: the case of the marine fish, diplodus sargus (linné, 1758)].a total of 842 white sea bream (diplodus sargus), sampled in banyuls-sur-mer, were analysed to test 'genotype-phenotype' relationship for various characters related to the fitness. the results show significant differences (mlh and fis) for the age according to the sex between females carrying out and not carrying out sexual inversion. this suggests an overdominance for old females and a genetic sex determination. the individuals laying very early during the period of reproduction are also differ ...200212017772
temporal change in the genetic structure between and within cohorts of a marine fish, diplodus sargus, induced by a large variance in individual reproductive success.temporal changes at 16 allozyme loci in the diplodus sargus population of banyuls-sur-mer (mediterranean sea, france) were monitored. temporal genetic variation within a single population was examined over two temporal scales: (i) among three year-classes sampled at the same age, and (ii) within a single year-class sampled three times over a two-year period. we observed a significant change in the genotypic structure within the same cohort during the first two years following settlement and befo ...200212144670
immunohistochemical detection of acth and msh cells in the hypophysis of the hermaphroditic teleost, diplodus sargus.hypophyseal acth and msh cells were immunohistochemically characterised in the teleost fish, diplodus sargus, using anti-acth (1-24) and anti alpha-msh polyclonal antisera. acth cells were found both in the pars distalis and in the pars intermedia. in the former region, they appeared small, round-shaped and clustered; in the latter, they were either small or large and elongated. moreover, a few acth-immunoreactive cells resembling microglia were present in the neurohypophysis. conversely, msh ce ...200011214865
an immunocytochemical study of the pituitary gland of the white seabream (diplodus sargus).the adenohypophysis of the white seabream (diplodus sargus) was studied using histochemical and immunocytochemical techniques. the adenohypophysis was composed of rostral pars distalis, proximal pars distalis and pars intermedia. prolactin (anti-chum salmon prolactin positive) and adrenocorticotropic (anti-human acth positive) cells were found in the rostral pars distalis. prolactin cells were organized into follicles, while acth cells were arranged in cords around neurohypophyseal tissue branch ...200011254089
the life cycle of monorchis parvus (digenea: monorchiidae) demonstrated by developmental and molecular data.cercaria cerastodermae i, a digenean parasite of cerastoderma edule, was recorded for the first time in the atlantic ocean off the iberian peninsula. sporocysts were present in the hemolymph of the digestive gland, gonad, gills, and foot of the mollusc. most of the cercariae present within sporocysts were encysted as metacercariae. the corresponding adult stages were obtained after experimental infection of several diplodus sargus artificially reared in fish farms and that had previously been pr ...200010864243
adrenocortical and adrenomedullary homologs in eight species of adult and developing teleosts: morphology, histology, and immunohistochemistry.morphology, histology, and immunohistochemistry of the adrenocortical and adrenomedullary homologs (adrenal glands) of the following developing and adult teleosts were examined: salmoniformes-oncorhynchus mykiss (rainbow trout), salmo trutta fario (brown trout), coregonus lavaretus (white fish); cyprinodontiformes-gambusia affinis (mosquito fish). perciformes-dicentrarchus labrax (sea bass), sparus aurata (sea bream), diplodus sargus (white bream), oblada melanura (saddled bream). the anatomical ...19979405124
ultrastructural localization of igm on b-lymphocytes of diplodus sargus. 19968741103
the blood cells and haemopoiesis of diplodus sargus l.: haematological values, cytochemistry and leukocytes' response to vaccine stimulation.the treatment with antipiogenic and trivalent antiviral vaccines evokes in sargus' blood an increase of the neutrophilic granulocytes and an activation of the lymphocytes. by using cytochemical reactions for acid phosphatase and aliesterase, a population of lymphocytes, amounting to about 25%, which displays positive reactions has been identified. the immunocytochemical reactions used to identify the mammalian t and b-lymphocytes, such as rosetting test, immune localization of cd (cluster of dif ...19968741101
fish plasma lipoproteins--comparative observations in serranides and sparides.1. diet, time from last feeding, temperature, season and sexual stage are some of the factors influencing the lipoprotein pattern. 2. keeping these factors constant species-specific differences observed among lipoprotein patterns of sparus aurata, puntazzo puntazzo, diplodus sargus, diplodus vulgaris and dicentrarchus labrax are discussed. 3. feeding habits and therefore lipid absorption and the rate of lipoprotein maturation process are the factors determining the observed differences.19911764905
[trematodes of fish from lebanese coasts. i. pseudopycnadena fischthali n.g. n.sp. (trematoda, opistholebetidae), a parasite of diplodus (teleostei) from lebanese coasts].description of a new species of trematode opistholebetidae, intestinal parasite of diplodus sargus and diplodus vulgaris from lebanese coasts. erection of a new genus pseudopycnadena.19863813416
the electrolyte content, osmolarity and site of secretion of the aqueous humor in two teleost fishes (carassius auratus and diplodus sargus). 19725070232
Refresh
firstprev
1
nextlast
Displaying items 1 - 71 of 71