The reproductive effort of Lepeophtheirus pectoralis (Copepoda: Caligidae): insights into the egg production strategy of parasitic copepods.


:The reproductive effort of Lepeophtheirus pectoralis (Müller O. F., 1776), a caligid copepod, which is commonly found infecting the European flounder, Platichthys flesus (Linnaeus, 1758), is studied in detail for the first time. Seasonal variation in body dimensions and reproductive effort are analysed. Data for 120 ovigerous females, 30 from each season of the year, were considered in the analyses. Females were larger and produced a larger number of smaller eggs in winter, than during the summer. The relationship between egg number and egg size is similar to that recorded for other copepods exploiting fish hosts. Much of the recorded variation was also similar to that reported for a copepod parasitic on an invertebrate host, which suggests the possibility of a general trend in copepod reproduction. Overall, our results provide further support for the hypothesis that there is an alternation of summer and winter generations.






Frade DG,Santos MJ,Cavaleiro FI




Has Abstract


2016-01-01 00:00:00














  • Dual congenital transmission of Toxoplasma gondii and Sarcocystis neurona in a late-term aborted pup from a chronically infected southern sea otter (Enhydra lutris nereis).

    abstract::Toxoplasma gondii and Sarcocystis neurona are protozoan parasites with terrestrial definitive hosts, and both pathogens can cause fatal disease in a wide range of marine animals. Close monitoring of threatened southern sea otters (Enhydra lutris nereis) in California allowed for the diagnosis of dual transplacental tr...


    pub_type: 杂志文章


    authors: Shapiro K,Miller MA,Packham AE,Aguilar B,Conrad PA,Vanwormer E,Murray MJ

    更新日期:2016-03-01 00:00:00

  • Plasmodium falciparum EBA-175 kDa protein peptides which bind to human red blood cells.

    abstract::Solid experimental evidence indicates that EBA-175 is used as a ligand by the Plasmodium falciparum merozoite to bind to human RBC, via different binding processing fragments. Using synthetic peptides and specific receptor-ligand interaction methodology, we have identified 6 high-activity binding sequences from the EB...


    pub_type: 杂志文章


    authors: Rodriguez LE,Urquiza M,Ocampo M,Suarez J,Curtidor H,Guzman F,Vargas LE,Triviños M,Rosas M,Patarroyo ME

    更新日期:2000-03-01 00:00:00

  • Alpha 2 giardin is an assemblage A-specific protein of human infective Giardia duodenalis.

    abstract::Of the 7 genetic assemblages of the parasite Giardia duodenalis only 2 (A and B) are known to cause infections in humans. These assemblages have been characterized in detail at the genomic level but few studies have examined differences in the proteins expressed. Employing one and two-dimensional PAGE we have identifi...


    pub_type: 杂志文章


    authors: Steuart RF,O'Handley R,Lipscombe RJ,Lock RA,Thompson RC

    更新日期:2008-12-01 00:00:00

  • Immunocytochemical demonstration of neuropeptides in the nervous system of the liver fluke, Fasciola hepatica (Trematoda, Digenea).

    abstract::The localization and distribution of neuropeptides in the nervous system of the liver fluke, Fasciola hepatica at different stages in the development of the adult fluke have been determined by an indirect immunofluorescence technique, using antisera to 19 vertebrate peptides and the invertebrate neuropeptide, FMRFamid...


    pub_type: 杂志文章


    authors: Magee RM,Fairweather I,Johnston CF,Halton DW,Shaw C

    更新日期:1989-04-01 00:00:00

  • The motornervous system of Ascaris: electrophysiology and anatomy of the neurons and their control by neuromodulators.

    abstract::Analysis of the electrical properties of neurons in the motornervous system of Ascaris sutom suggests that it is largely an analogue system. The motorneurons do not conduct action potentials and they release transmitter tonically at their normal resting potential; transmitter release is increased or decreased as a con...


    pub_type: 杂志文章,评审


    authors: Davis RE,Stretton AO

    更新日期:1996-01-01 00:00:00

  • Characterization of an atypical antigen from Sarcoptes scabiei containing an MADF domain.

    abstract::We have cloned a cDNA encoding a novel antigen from a Sarcoptes scabiei (Acari) cDNA library by immunoscreening with sera from S. scabiei-infected dogs. The antigen is encoded by a 2,157 bp mRNA with a predicted open reading frame of 719 amino acids (molecular weight 79 kDa). Our sequence analysis identified the prese...


    pub_type: 杂志文章


    authors: Ljunggren EL,Bergström K,Morrison DA,Mattsson JG

    更新日期:2006-01-01 00:00:00

  • Similarity and structure of the ectoparasite communities of rockfish species from the southern Chilean coast in a temporal scale.

    abstract::The understanding of the patterns and processes underlying the structure of parasite communities has progressed significantly in the last years; however, much of the evidence available to date on parasite community comes from unconfirmed studies. In this study the ectoparasite communities of 2 related rockfishes, Seba...


    pub_type: 杂志文章


    authors: González MT,Oliva ME

    更新日期:2006-09-01 00:00:00

  • Isolation and characterization of secretions from the plant-parasitic nematode Globodera pallida.

    abstract::Electrophoresis of secretions collected from Globodera pallida revealed a smeared region between 25 and 50 kDa, and a single band of < 20 kDa. The secretions were used to raise an antiserum (LW1). Immunoblotting of parasite homogenates with LW1 differentiated G. pallida from its sibling species G. rostochiensis and re...


    pub_type: 杂志文章


    authors: Duncan LH,Robertson L,Robertson WM,Kusel JR

    更新日期:1997-10-01 00:00:00

  • In vitro cultivation of Trypanosoma congolense bloodstream forms in the absence of feeder cell layers.

    abstract::Bloodstream forms of Trypanosoma congolense (2 clones: ILNat3.1 and IL3000, and 4 stocks: IL2079, IL2466, IL3266 and CP-81) were continuously cultivated in vitro at 34-36 degrees C in the absence of feeder cell layers, using HMI-93 medium which was modified from Iscove's modified Dulbecco's MEM (Flow Laboratories, Irv...


    pub_type: 杂志文章


    authors: Hirumi H,Hirumi K

    更新日期:1991-04-01 00:00:00

  • Egg hatching in 3 species of monocotylid monogenean parasites from the shovelnose ray Rhinobatos typus at Heron Island, Australia.

    abstract::Eggs of Neoheterocotyle rhinobatidis, Troglocephalus rhinobatidis and Merizocotyle icopae (Monogenea: Monocotylidae) from the shovelnose ray Rhinobatos typus (Rhinobatidae) have a distinct hatching pattern linked to light periodicity. Larvae of these 3 monogenean species emerge only during daylight when exposed to nat...


    pub_type: 杂志文章


    authors: Chisholm LA,Whittington ID

    更新日期:2000-09-01 00:00:00

  • Anthelmintic activity of plants against gastrointestinal nematodes of goats: a review.

    abstract::The gastrointestinal nematodes (GIN) stand out as an important cause of disease in small ruminant, especially on goat farm. Widespread resistance to synthetic anthelminthics has stimulated the research for alternative strategies of parasite control, including the use of medicinal plants. The present work summarizes th...


    pub_type: 杂志文章


    authors: Oliveira Santos F,Ponce Morais Cerqueira A,Branco A,José Moreira Batatinha M,Borges Botura M

    更新日期:2019-09-01 00:00:00

  • Ribosomal DNA sequences in the differentiation of pathogenic and non-pathogenic isolates of Entamoeba histolytica.

    abstract::Recombinant ribosomal DNA sequences were amplified by PCR and used as probes to perform a fingerprint analysis of total DNA from different Entamoeba histolytica isolates. RFLPs obtained with one of the probes, R-1, support previous proposals that pathogenic and non-pathogenic E. histolytica are closely related, yet ge...


    pub_type: 杂志文章


    authors: Cruz-Reyes JA,Spice WM,Rehman T,Gisborne E,Ackers JP

    更新日期:1992-04-01 00:00:00

  • Morphological characterization and molecular phylogeny of zoonotic trematodes in the freshwater snail Asolene platae.

    abstract::In the context of a broader program dealing with the symbiotic associations of apple snails, we sampled three species that coexist in Lake Regatas (Palermo, Buenos Aires, Argentina). The population of Asolene platae, (but not those of Pomacea canaliculata and Pomacea scalaris) showed trematode larvae (echinocercariae ...


    pub_type: 杂志文章


    authors: Dellagnola FA,Montes MM,Martorelli SR,Vega IA

    更新日期:2019-06-01 00:00:00

  • Isolation of Theileria parasites from African buffalo (Syncerus caffer) and characterization with anti-schizont monoclonal antibodies.

    abstract::Antigenic differences between intra-lymphocytic theilerial parasites isolated from the blood of 18 African buffalo and grown in vitro were assessed with anti-schizont monoclonal antibodies (mAbs). There was marked antigenic diversity both between isolates from different buffalo and between isolates taken at different ...


    pub_type: 杂志文章


    authors: Conrad PA,Stagg DA,Grootenhuis JG,Irvin AD,Newson J,Njamunggeh RE,Rossiter PB,Young AS

    更新日期:1987-06-01 00:00:00

  • Avian malaria, ecological host traits and mosquito abundance in southeastern Amazonia.

    abstract::Avian malaria is a vector transmitted disease caused by Plasmodium and recent studies suggest that variation in its prevalence across avian hosts is correlated with a variety of ecological traits. Here we examine the relationship between prevalence and diversity of Plasmodium lineages in southeastern Amazonia and: (1)...


    pub_type: 杂志文章


    authors: Fecchio A,Ellis VA,Bell JA,Andretti CB,D'Horta FM,Silva AM,Tkach VV,Weckstein JD

    更新日期:2017-07-01 00:00:00

  • gamma delta T cells do not play a major role in controlling infection in experimental cysticercosis.

    abstract::Protective immunity against larval Taenia crassiceps has been shown to rely on T cells; however, the roles of the specific subsets of T cells during infection are not known. To investigate a possible role for gamma delta T cells, this study investigated larval infection in delta-chain knock-out C57BL/6 (deltaKO) and w...


    pub_type: 杂志文章


    authors: Toenjes SA,Spolski RJ,Mooney KA,Kuhn RE

    更新日期:1999-10-01 00:00:00

  • Apparent tolerance of Plasmodium falciparum in infants in a highly endemic area.

    abstract::The incidence of fever among infants in the village of Idete in the Morogoro region of Tanzania was analyzed in relation to densities of Plasmodium falciparum parasites in the peripheral blood. Parasite densities in both fever cases and in asymptomatic infants, were compared and a Bayesian non-parametric mixture decom...


    pub_type: 杂志文章


    authors: Vounatsou P,Smith T,Kitua AY,Alonso PL,Tanner M

    更新日期:2000-01-01 00:00:00

  • Resistance to Onchocerca lienalis microfilariae in mice conferred by egg antigens of homologous and heterologous Onchocerca species.

    abstract::Embryonic stages of various Onchocerca species have been used to stimulate resistance in CBA mice to challenge injections with the microfilariae of Onchocerca lienalis. Comparable levels of resistance to challenge (29-37% reductions) were conferred by living, freeze-killed, or sonicated organisms administered with Fre...


    pub_type: 杂志文章


    authors: Carlow CK,Bianco AE

    更新日期:1987-06-01 00:00:00

  • Phagocyte-specific S100 proteins in the local response to the Echinococcus granulosus larva.

    abstract::Infection by larval Echinococcus granulosus is usually characterized by tight inflammatory control. However, various degrees of chronic granulomatous inflammation are also observed, reaching a high point in infection of cattle by the most prevalent parasite strain worldwide, which is not well adapted to this host spec...


    pub_type: 杂志文章


    authors: Basika T,Muñoz N,Casaravilla C,Irigoín F,Batthyány C,Bonilla M,Salinas G,Pacheco JP,Roth J,Durán R,Díaz A

    更新日期:2012-02-01 00:00:00

  • Non-homogenized ITS regions in the parasitic nematode Cooperia oncophora.

    abstract::Here, the validity of the assumption of concerted evolution of ribosomal regions in larval and adult Cooperia oncophora was assessed. In each of 4 individuals of this parasitic nematode, at least 78% of the sequences comprised different ITS variants. This implies that concerted evolution is not acting, which is corrob...


    pub_type: 杂志文章


    authors: Mes TH,Cornelissen AW

    更新日期:2004-08-01 00:00:00

  • Glucose transport in Acanthocheilonema viteae.

    abstract::The uptake of glucose by Acanthocheilonema viteae was studied in vitro. The process was selective for the D-isomer and saturatable with a Km of 2 mM. The rate of glucose transport/utilization was inhibited by 2-deoxyglucose, mannose, 5-thioglucose and dipyridamole but, unlike mammalian systems, was not impaired by cyt...


    pub_type: 杂志文章


    authors: Hayes DJ,Selwood DL

    更新日期:1990-10-01 00:00:00

  • Comparative analysis of ITS1 nucleotide sequence reveals distinct genetic difference between Brugia malayi from Northeast Borneo and Thailand.

    abstract::Brugia malayi is one of the parasitic worms which causes lymphatic filariasis in humans. Its geographical distribution includes a large part of Asia. Despite its wide distribution, very little is known about the genetic variation and molecular epidemiology of this species. In this study, the internal transcribed space...


    pub_type: 杂志文章


    authors: Fong MY,Noordin R,Lau YL,Cheong FW,Yunus MH,Idris ZM

    更新日期:2013-01-01 00:00:00

  • The parasitism of Schistosoma mansoni (Digenea-Trematoda) in a naturally infected population of water rats, Nectomys squamipes (Rodentia-Sigmodontinae) in Brazil.

    abstract::Schistosomiasis is a health problem in Brazil and the role of rodents in maintaining the schistosome life-cycle requires further clarification. The influence of Schistosoma mansoni on a population of Nectomys squamipes was studied by capture-recapture (1st phase, from June 1991 to November 1995) and removal (2nd phase...


    pub_type: 杂志文章


    authors: D'Andrea PS,Maroja LS,Gentile R,Cerqueira R,Maldonado Júnior A,Rey L

    更新日期:2000-06-01 00:00:00

  • Signatures of mito-nuclear discordance in Schistosoma turkestanicum indicate a complex evolutionary history of emergence in Europe.

    abstract::High levels of molecular diversity were identified in mitochondrial cytochrome c oxidase (cox1) gene sequences of Schistosoma turkestanicum from Hungary. These cox1 sequences were all specific to Hungary which contrasted with the low levels of diversity seen in the nuclear internal transcribed spacer region (ITS) sequ...


    pub_type: 杂志文章


    authors: Lawton SP,Bowen LI,Emery AM,Majoros G

    更新日期:2017-11-01 00:00:00

  • A novel assay for the detection of anthelmintic activity mediated by cuticular damage to nematodes: validation on Caenorhabditis elegans exposed to cysteine proteinases.

    abstract::Plant cysteine proteinases (CPs) from Carica papaya kill parasitic and free-living nematodes in vitro by hydrolysis of the worm cuticle, a mechanism that is different to all commercially available synthetic anthelmintics. We have developed a cheap and effective, rapid-throughput Caenorhabditis elegans-based assay for ...


    pub_type: 杂志文章


    authors: Phiri AM,DE Pomerai DI,Buttle DJ,Behnke JM

    更新日期:2017-04-01 00:00:00

  • Induction of the prophenoloxidase-activating system of Simulium (Diptera: Simuliidae) following Onchocerca (Nematoda: Filarioidea) infection.

    abstract::Trials were carried out to study the humoral immune response of blackflies to filariae following infection using the intrathoracic injection technique. An induced 66 kDa protein was abundant in the haemolymph of the European species Simulium ornatum following infection with bovine Onchocerca lienalis. This protein was...


    pub_type: 杂志文章


    authors: Hagen HE,Grunewald J,Ham PJ

    更新日期:1994-12-01 00:00:00

  • An ELISA for the detection of pentastomid infections in the rat.

    abstract::A specific enzyme-linked immunosorbent assay, based on a 48 kDa metallo-proteinase isolated from the frontal glands of a porocephalid pentastomid (Porocephalus crotali) in rat intermediate hosts, is described. SDS-PAGE analysis of whole nymphal homogenate, followed by Western blotting and probing with immune rat serum...


    pub_type: 杂志文章


    authors: Jones DA,Riley J

    更新日期:1991-12-01 00:00:00

  • Species delimitation in trematodes using DNA sequences: Middle-American Clinostomum as a case study.

    abstract::The recent development of genetic methods allows the delineation of species boundaries, especially in organisms where morphological characters are not reliable to differentiate species. However, few empirical studies have used these tools to delineate species among parasitic metazoans. Here we investigate the species ...


    pub_type: 杂志文章


    authors: Pérez-Ponce DE León G,García-Varela M,Pinacho-Pinacho CD,Sereno-Uribe AL,Poulin R

    更新日期:2016-11-01 00:00:00

  • Soil-transmitted helminth infections in school children from Cocle Province, Republic of Panama.

    abstract::A survey was carried out to determine values for the prevalence and intensity of infection of intestinal helminths in children living in Cocle Province, Republic of Panama. The data set consisted of the results of microscopic examinations (modified Kato Katz technique) of stool samples collected in November 1987 from ...


    pub_type: 杂志文章


    authors: Robertson LJ,Crompton DW,Walters DE,Nesheim MC,Sanjur D,Walsh EA

    更新日期:1989-10-01 00:00:00

  • Behaviour and development of Elasmosoma sp. (Neoneurinae: Braconidae: Hymenoptera), an endoparasite of Formica ants (Formicidae: Hymenoptera).

    abstract::The behaviour and development of Elasmosoma sp., near pergandei Ashm. (Neoneurinae: Braconidae: Hymenoptera), a parasite of the ant, Formica obscuriventris clivia Creighton, was studied in a coastal sand dune habitat in central Oregon over a 2-year period. Female wasps oviposited into the abdomen of major worker ants ...


    pub_type: 杂志文章


    authors: Poinar G Jr

    更新日期:2004-05-01 00:00:00