Resilience of breeding Coccotrypes dactyliperda Fabricius, 1801 (Coleoptera: Curculionidae: Scolytinae) to ingestion by vertebrates

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Abstract

Volant and terrestrial predators consume a wide range of palm drupes, some of which may be infested by spermatophagus beetles. Field observations suggest that the larvae of some beetle species survive the passage through the gastrointestinal tract. To assess the resilience of the date stone beetle, Coccotrypes dactyliperda Fabricius, 1801 (Coleoptera: Curculionidae: Scolytinae) to ingestion by vertebrates, specimens reared from infested Phoenix
canariensis (Chabaud, 1882) (Arecales: Arecaceae) seeds were exposed in vitro to simulated gastric and intestinal fluids in a laboratory setting at Charles Sturt University (Albury, Australia) in 2018. The observed mortality among
beetles protected in their galleries inside the seeds was low (11-24%). The continued breeding success was affected by numerous beetles abandoning the seeds after immersion. Total mortality occurred among unprotected beetles
exposed for 12 h or longer. This study demonstrates that as mortality of adult beetles inside ingested seeds is very low, vertebrate vectors may aid in the medium- to long-distance dispersal of the species.
Original languageEnglish
Pages (from-to)203-214
Number of pages12
JournalTurkish Journal of Entomology / Türkiye Entomoloji Dergisi
Volume44
Issue number2
DOIs
Publication statusPublished - 07 Feb 2020

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