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Swordfish Reproduction In The Atlantic Ocean: An Overview, Freddy Arocha
Swordfish Reproduction In The Atlantic Ocean: An Overview, Freddy Arocha
Gulf and Caribbean Research
There are 3 unit stocks of Atlantic swordfish, Xiphias gladius, separated into Mediterranean, North and South Atlantic with no precise delimitation between them, and each contains its spawning grounds far from stock boundary areas. This overview characterizes the reproductive information for each stock unit and describes reproductive metrics in detail. Spawning in the western North Atlantic consists of 2 spawning groups: one in open ocean waters and the other in waters close to land masses and fast current systems. Spawning occurs from December to June within the subtropical area (13°N-35°N). Within the Mediterranean, spawning takes place between June and …
Nocturnal Depth Distribution Of Western North Atlantic Swordfish (Xiphias Gladius, Linnaeus, 1758) In Relation To Lunar Illumination, Joshua K. Loefer, George R. Sedberry, John C. Mcgovern
Nocturnal Depth Distribution Of Western North Atlantic Swordfish (Xiphias Gladius, Linnaeus, 1758) In Relation To Lunar Illumination, Joshua K. Loefer, George R. Sedberry, John C. Mcgovern
Gulf and Caribbean Research
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 deeades 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.