Trophic preference of Pterois volitans (Scorpaenidae) in the coastal area of Holguin, Cuba
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Abstract
The lionfish (Pterois volitans) is a species of reef fish that has invaded the Western Atlantic in a dizzying manner. The objective of this study was to characterize the diet of the lionfish in the coastal zone of Holguín, Cuba. For this purpose, eight sampling campaigns were conducted during the period April-November 2016 in six coastal sites, including frontal, artificial reefs and bays located between 14 and 35 m deep. A total of 250 specimens with sizes between 8 and 33 cm of standard length were collected. Through stomach contents analysis, 27 types of prey were identified, which were grouped into the trophic categories of fish, crustaceans and mollusks. The fish were the principal component in the diet of the lionfish according to the numerical, frequency, gravimetric methods and the index of relative importance. Within the preys, the fish species Holocentrus rufus and Monocanthus tuckeri were the most representative. The diet of the lionfish in the study area reflected the availability of prey at each site, suggesting that it is an opportunistic predator (Levin index = 0.91). No statistical differences were found in relation to the similarity between the sampling sites based on the contribution of the weight of the different components consumed.
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invasive species, opportunistic predator, lionfish
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