|Appears in Collections:
|Aquaculture Journal Articles
|Peer Review Status:
|First description of parasitation by Agregata octopiana in common octopus, Octopus vulgaris, in Canary Islands
Caballero, Maria Jose
|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.
|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.
|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.
|Fulltext - Accepted Version
|Under Embargo until 3000-12-01 Request a copy
Note: If any of the files in this item are currently embargoed, you can request a copy directly from the author by clicking the padlock icon above. However, this facility is dependent on the depositor still being contactable at their original email address.
This item is protected by original copyright
Items in the Repository are protected by copyright, with all rights reserved, unless otherwise indicated.
The metadata of the records in the Repository are available under the CC0 public domain dedication: No Rights Reserved https://creativecommons.org/publicdomain/zero/1.0/
If you believe that any material held in STORRE infringes copyright, please contact email@example.com providing details and we will remove the Work from public display in STORRE and investigate your claim.