Vessel sound causes hearing loss for hummingbird bobtail squid (Euprymna berryi)

Anthropogenic activity and its associated sounds have been shown to incur adverse effects on the behaviour physiology of a wide range aquatic taxa, from marine mammals fishes. Yet, little is known about how invertebrates detect respond anthropogenic sound. The hummingbird bobtail squid ( Euprymna berryi ) has short lifespan (< 6 months), grows sexual maturity around 90 days post hatching small size 5 cm mantle length) makes species an ideal candidate examine potential sound exposure under laboratory conditions. Hearing behavioural observations were made before, during after 15 minutes vessel playback, aural sensitivity curves determined using auditory evoked potentials. A significant decrease in relative ventilation rate was observed exposure. Auditory before also examined for three different ages: juveniles, mid- late adults. Baseline audiograms indicated that there with age. All age groups showed similar, significantly decreased hearing following exposure, however recovered within two hours. Globally, become louder more persistent, therefore may be limited time these animals recover Given their ecological economic importance, cephalopods should considered management policy underwater noise owing physiology.