Comparative feeding habits of the invasive non-indigenous devil firefish Pterois miles and the indigenous scorpionfishes Scorpaena porcus, Scorpaena scrofa, and Scorpaena notata on the southwest coast of Türkiye, eastern Mediterranean
Published:
Dec 3, 2024
Keywords:
stomach content diet marine invasion Scorpionfish lionfish
Abstract
The feeding habits of the invasive alien devil firefish (Pterois miles) and the indigenous scorpaenids Scorpaena porcus, Scorpaena scrofa, and Scorpaena notata in the eastern Mediterranean Sea were investigated based on stomach content analysis. Furthermore, we examined whether these confamiliar species feed upon similar prey. Specimens were captured by professional fishers using trammel nets on the southwestern coast of Türkiye in the winter and summer of 2021. A total of 608 stomachs (286 P. miles, 112 S. porcus, 136 S. scrofa, and 74 S. notata) were investigated. The results demonstrate that the diet of P. miles included a total of 45 taxa, with 33 identified at the species level (27 indigenous, 6 non-indigenous), while those of the three congeneric scorpaenids included a total of 46 taxa and 37 identified species (30 indigenous, 7 non-indigenous). For P. miles, the highest index of relative importance (%IRI) values were determined for fish in both seasons (83.44% in winter, 93.82% in summer), with the damselfish Chromis chromis being the most preferred species. S. scrofa fed mainly on fish in winter and cephalopods in summer, whereas the diets of S. porcus and S. notata included mainly crustaceans in both seasons. In winter, P. miles exhibited a higher percentage of empty stomachs, demonstrating a significant difference in the vacuity index in different sampling seasons, while other scorpaenids did not exhibit statistically significant differences. This study also provides the northernmost record of the non-indigenous crab species Gonioinfradens giardi and the second record of the squat lobster Dactylonida curvimana in Türkiye. It also provides new reports of rarely observed fish species for the eastern Mediterranean, including Bellottia apoda and Odondebuenia balearica.
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ÖNDES, F., ÖZDEN, U., ALAN, V., IRMAK, E., & GÜÇLÜSOY, H. (2024). Comparative feeding habits of the invasive non-indigenous devil firefish Pterois miles and the indigenous scorpionfishes Scorpaena porcus, Scorpaena scrofa, and Scorpaena notata on the southwest coast of Türkiye, eastern Mediterranean. Mediterranean Marine Science, 25(3), 753–767. https://doi.org/10.12681/mms.38039
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