2026-08-29T19:28:15Zhttps://repisalud.isciii.es/rest/oai/request

oai:repisalud.isciii.es:20.500.12105/235992024-11-28T23:48:24Zcom_20.500.12105_15322com_20.500.12105_2051col_20.500.12105_16967

00925njm 22002777a 4500 dc Cohen-Sánchez, Amanda author Valencia, José María author Box, Antonio author Solomando, Antónia author Tejada Gavela, Silvia author Pinya, Samuel author Catanese, Gaetano author Sureda Gomila, Antoni author 2023 Xyricthys novacula is very popular fish species in the Balearic Islands and a main target for recreational fishing. Over the last years, spots were observed on many individuals, which seems to be progressively more common. The aim of the present study was to identify the parasite, determine its abundance in a marine protected area (MPA) and in a non-protected one with more anthropic influence, and to evaluate the antioxidant and immune responses to this parasite presence by studying biomarkers in both liver and epithelial mucus. Analysis of genetic sequences established with 98.6–98.4% certainty that the parasite is a digenean fluke Scaphanocephalus sp. An average abundance of 12.3 ± 11.3 and 1.3 ± 1.3 parasites per individual was found for the non-protected area and the MPA, respectively. The activities of lysozyme and superoxide dismutase and total immunoglobulin concentration were significantly higher in mucus of X. novacula with more parasites. Similarly, in liver, a higher parasite load is related to higher activities of catalase, glutathione peroxidase and glutathione S-transferase, whereas malondialdehyde remained similar. In conclusion, Scaphanocephalus sp. affects X. novacula, inducing an immune and antioxidant response in epithelial mucus and in liver. The potential influence of the environment on parasite transmission, prevalence and abundance require further research to determine whether it makes fish more susceptible to infections. Cohen-Sánchez A, Valencia JM, Box A, Solomando A, Tejada S, Pinya S, et al. Black spot disease related to a trematode ectoparasite causes oxidative stress in Xyrichtys novacula. J Exp Mar Bio Ecol. 2023 Mar;560:151854. 10.1016/j.jembe.2022.151854 0022-0981 Journal of Experimental Marine Biology and Ecology https://hdl.handle.net/20.500.13003/18774 2-s2.0-85144359788 https://hdl.handle.net/20.500.12105/23599 911596700001 Black spot disease related to a trematode ectoparasite causes oxidative stress in Xyrichtys novacula