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Increase of parasitism in the genus Lophius from the NW Mediterranean Sea and the effects in its morphology: searching for answers

AuthorsColmenero, Ana I. ; Barría, Claudio ; Tuset, Víctor M. ; Sánchez, Pilar
Issue Date27-Jun-2014
PublisherSociedad Ibérica de Ictiología
CitationV Jornadas Ibéricas de Ictiología SIBIC. Conhecer para preservar: 76-77 (2014)
AbstractClimate change could have a great impact on the spread of parasites in marine ecosystems because the increase of the temperature may cause thermal stress in aquatic animals, leading to reduced immunocompetence and increasing the susceptibility of the host to the parasite. In this study we describe two specimens of black anglerfish Lophius budegassa caught in the northwestern Mediterranean Sea with atypical morphological characteristics: pigment anomalies and blindness; which held a great quantity of the parasite Spraguea lophii. This parasite is a microsporidian (intracellular parasite related to fungi) that infects the nervous system of genus Lophius. It is manifested as cyst structures (xenomas) usually located along the length of the vertebral column, and on the medulla oblongata of the hind brain. Some authors consider that severe contagions might cause the anomalies mentioned above, even death. In order to evaluate the number of specimens infected in the last years, a total of 292 L. budegassa were examined from commercial catches along the northwestern Mediterranean Sea during 2013, and the results were compared with previous studies. The prevalence (a quantitative descriptor of parasite population) of S. lophii was calculated for black anglerfish with a result of 69.18%. An increase of the 58.12% in the prevalence of S. lophii in L. budegassa was observed since 1996. The consequences of this invasive process in the populations and in the fishing activity are up to date unknown
DescriptionV Jornadas Ibéricas de Ictiología SIBIC, Conhecer para preservar, 24-27 June 2014, Lisboa .-- 2 pages
Publisher version (URL)http://sibic.org/jornadas/2014/comunicaciones_es.html
Appears in Collections:(ICM) Comunicaciones congresos
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