Search results for "sparicotyle chrysophrii"

Acting locally - affecting globally: RNA sequencing of gilthead sea bream with a mild Sparicotyle chrysophrii infection reveals effects on apoptosis,…

2019

[Background] Monogenean flatworms are the main fish ectoparasites inflicting serious economic losses in aquaculture. The polyopisthocotylean Sparicotyle chrysophrii parasitizes the gills of gilthead sea bream (GSB, Sparus aurata) causing anaemia, lamellae fusion and sloughing of epithelial cells, with the consequent hypoxia, emaciation, lethargy and mortality. Currently no preventive or curative measures against this disease exist and therefore information on the host-parasite interaction is crucial to find mitigation solutions for sparicotylosis. The knowledge about gene regulation in monogenean-host models mostly comes from freshwater monopysthocotyleans and almost nothing is known about …

Oncomiracidial development, survival and swimming behaviour of the monogenean Sparicotyle chrysophrii (Van Beneden and Hesse, 1863)

2012

Abstract Oncomiracidial development of Sparicotyle chrysophrii , a monogenean parasite of Sparus aurata , was analysed using 450 eggs. Parasite morphological changes in time, data on hatching success, as well as oncomiracidial survival and swimming behaviour were recorded. Eggs were maintained at 20 °C and exposed to LD 12:12. They were observed under the stereomicroscope every 8 h until they hatched. Thereafter, 155 oncomiracidia were isolated in separate wells and observed every 2 h until their death. Most of the hatchings occurred in a short period of time (approximately 24 h). Hatching success was 87% and the hatching period ranged from 5 to 10 days after deposition, with most of the ha…

In Vitro Testing of Alternative Synthetic and Natural Antiparasitic Compounds against the Monogenean Sparicotyle chrysophrii

2021

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Post-larval development of the microcotylid monogenean Sparicotyle chrysophrii (Van Beneden and Hesse, 1863): comparison with species of Microcotylid…

2011

Abstract The chronology of post-larval development in S. chrysophrii, a polyopisthocotylean monogenean parasite of the gilthead seabream (Sparus aurata L.), was experimentally studied. It is compared with other species within the Microcotylidae and the Heteraxinidae, including an analysis of the changes in attachment and the growth rate. Gilthead seabreams infected by larvae of S. chrysophrii were killed periodically in order to collect the different developmental stages. Parasite total body length, haptor length, largest clamp width, and total number of clamps were recorded. Specimens of S. chrysophrii in culture conditions at 20 °C became gravid after 26–30 days, with 37 pairs of clamps. …

In‐feed trials of fenbendazole and other chemical/natural compounds against Sparicotyle   chrysophrii (Monogenea) infections in Sparus   aurata (Oste…

2021

Metazoan parasites in meagre and gilthead seabream aquaculture: monogeneans, from biology to infection management

2021

Pathologies represent a relevant bottleneck for aquaculture development and must be taken into account in the selection of potential species for diversification. Determining pathogens affecting new and traditional cultured species as well as their potential impacts on fish health becomes essential for optimising the development and viability of fish productions. Among pathogens, monoxenous metazoans, such as platyhelminth monogeneans, have a marked influence on fish health, especially in aquaculture where they cause significant economic losses in the main fish-farming industries. Population dynamics in host-parasite systems are modulated by environmental conditions. Therefore, effective man…

Studies on metazoan parasites of two marine fish species of interest for aquaculture: Seriola dumerili and Sparus aurata

2013

0.1. Introducción general La acuicultura ha experimentado un importante aumento durante los últimos 50 años, resultado del incremento global de población y la creciente demanda de proteínas de alta calidad. En los últimos 40 años, la proporción de reservas pesqueras moderadamente explotadas ha descendido progresivamente hasta estabilizarse en el 15% y en la actualidad, la mayoría de los stocks pesqueros están sobreexplotados y (FAO, 2010). Más de la mitad de los productos acuáticos provienen de granjas, siendo los peces de agua dulce los animales más cultivados seguidos por los moluscos, los crustáceos, los peces diádromos y los peces marinos (FAO, 2010). España es el país con mayor producc…