Life in Extreme Conditions: Diet and Condition of the Extremophile Fish Aphanius almiriensis (Teleostei: Cyprinodontiformes) in a Thermal Rheocrene Spring

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dc.contributor.authorSac, Gulsah
dc.contributor.authorOzulug, Oya
dc.contributor.authorAgdamar, Sevan
dc.contributor.authorInci, Harun
dc.contributor.authorYurekli, Ozgun Deniz
dc.contributor.authorOzulug, Mufit
dc.date.accessioned2025-05-29T02:58:15Z
dc.date.available2025-05-29T02:58:15Z
dc.date.issued2025
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractThis study aims to understand the bioecological traits of an extremophile fish, Aphanius almiriensis, in order to explore how it survives and colonizes extreme habitat conditions. To achieve this, the bioecological characteristics-condition, diet, and feeding strategy-of A. almiriensis inhabiting the Tuzla thermal spring, which is characterized by extreme habitat conditions in terms of physicochemical water parameters, were studied. Among the physicochemical parameters measured, salinity and temperature were remarkably high, ranging from 23.7 degrees C (in winter) to 42.7 degrees C (in summer) and from 47.7 ppt (in autumn) to 60.7 ppt (in winter). A total of 248 fish individuals were collected from the thermal spring, and the diet analyzed seasonally consisted of 17 different food items, and their importance values (MI% and IRI%) varied seasonally. According to the F%, IRI%, and MI% values, the population fed mainly on Diatom, Cyanobacteria, and Diptera, resulting in niche breadth with low values ranging from 0.25 to 0.54. The extreme conditions of the thermal spring indicated that the environment was poor in terms of macroinvertebrate diversity (six taxa), and fish showed food selectivity (E) for Chironomidae and Ceratopogonidae in winter, spring, and summer and for Ephydridae in autumn (E > 0; positive selectivity). Seasonally influenced fish condition was represented by high values in summer (K = 1.43 +/- 0.14) and was positively correlated with both water temperature and the increasing importance of the genus Phormidium in its diet. This study provides the first comprehensive insight into the seasonal diet and condition of A. almiriensis, shedding light on its survival strategies in harsh ecological conditions.
dc.description.sponsorshipTurkiye Bilimsel ve Teknolojik Arastirma Kurumu; Istanbul Universitesi
dc.description.sponsorshipThis paper was financially supported by Turkiye Bilimsel ve Teknolojik Arastirma Kurumu and Istanbul Universitesi.
dc.identifier.doi10.1002/ece3.71411
dc.identifier.issn2045-7758
dc.identifier.issue5
dc.identifier.pmid40342694
dc.identifier.scopus2-s2.0-105004705846
dc.identifier.scopusqualityQ2
dc.identifier.urihttps://doi.org/10.1002/ece3.71411
dc.identifier.urihttps://hdl.handle.net/20.500.12428/30299
dc.identifier.volume15
dc.identifier.wosWOS:001483145800001
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.language.isoen
dc.publisherWiley
dc.relation.ispartofEcology and Evolution
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WOS_20250529
dc.subjectbenthic insect
dc.subjectbiotic interactions
dc.subjectextreme habitat
dc.subjectfeeding ecology
dc.subjectkillifish
dc.titleLife in Extreme Conditions: Diet and Condition of the Extremophile Fish Aphanius almiriensis (Teleostei: Cyprinodontiformes) in a Thermal Rheocrene Spring
dc.typeArticle

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