Nocturnal depth distribution of western north atlantic swordfish (Xiphias gladius, Linnaeus, 1758) in relation to lunar illumination
Authors
Loefer, J.L.; Sedberry, G.R. McGovern, J.C. Download PDF Open PDF in BrowserOther Information
Date: Nov-06
Pages: 83-88
Event: Gulf and Caribbean Research 19 (2)
City: Belize City
Country: Belize
Abstract
Swordfish are known to undergo large diel vertical movements from surface waters at night to > 300 m depth during the day. Evidence presented over the past several decades suggests the lunar cycle affects these vertical migrations. This study collected data concurrently from 7 swordfish throughout 3 consecutive lunar cycles using pop-up satellite archival tags. All individuals demonstrated an inverse relationship between recorded nocturnal depths and lunar illumination.