Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/20015
Appears in Collections:Aquaculture Journal Articles
Peer Review Status: Refereed
Title: First description of parasitation by Agregata octopiana in common octopus, Octopus vulgaris, in Canary Islands
Authors: Betancor, Monica
Estefanell, Juan
Socorro, Juan
Roo, Javier
Caballero, Maria Jose
Contact Email: monica.betancor@stir.ac.uk
Keywords: floating cages
apicomplexa
protista
cuvier
Issue Date: 2013
Publisher: European Association of Fish Pathologists
Citation: Betancor M, Estefanell J, Socorro J, Roo J & Caballero MJ (2013) First description of parasitation by Agregata octopiana in common octopus, Octopus vulgaris, in Canary Islands, Bulletin of the European Association of Fish Pathologists, 33 (1), pp. 13-20.
Abstract: The negative effects that infections with the coccidian parasite Aggregata octopiana has in cephalopods is widely known. However, the assessment of this pathology is fundamental to optimize the intensive culture of octopus. In the present report a total of 35 octopuses were studied, 6 coming from the wild, 5 grown in land tanks, 11 grown in benthic sea cages and 13 grown in floating cages. Each octopus was individually identified by a microchip and fed a fresh diet based on discarded bogue and crab during two months for then being sacrificed and sampled. Experimental animals were weighed weekly to calculate their growing rate and, at the end of the trial, segments from intestine, stomach and gills were fixed in buffered formalin for their histopathological evaluation. Furthermore, caecum smears were studied in fresh and after Giemsa staining. In each studied group the prevalence of infection was up to 70%, being 100% in the case of animals grown in land tanks. Weight gain was high, around 38 g.day(-1), excepting for animals grown in land tanks (only 9 g.day(-1)). Sexual and asexual reproductive forms of this parasite were observed in studied organs, being macroscopically observed as white nodules distributed all along the digestive tract. Histologically, lesions observed in intestines consisted of a marked dilatation of lamina propria and presence of a moderate inflammatory reaction at intestinal villi, which were invaded by parasitic structures. In gills, parasites were observed both in epithelial and connective tissue, generating haemocytic infiltrates. This paper reports the first description of an apicomplexan of the genus Aggregata in Octopus vulgaris from northeastern central Atlantic waters and proves that growing of octopus in cages is optimal for this species.
Type: Journal Article
URI: http://hdl.handle.net/1893/20015
Rights: The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.
Affiliation: Aquaculture
Universidad de Las Palmas de Gran Canaria
Universidad de Las Palmas de Gran Canaria
Universidad de Las Palmas de Gran Canaria
Universidad de Las Palmas de Gran Canaria

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