Ameliorating transport-related stress in endangered Kemp's ridley sea turtles (Lepidochelys kempii) with a recovery period in saltwater pools. Issue 1 (2nd January 2019)

• Record Type: Journal Article
• Authors: Hunt, Kathleen E; Innis, Charles; Merigo, Constance; Burgess, Elizabeth A; Norton, Terry; Davis, Deborah; Kennedy, Adam E; Buck, C Loren
• Editors: Cooke, Steven
• Is Part Of: Conservation physiology. Volume 7:Issue 1(2019)
• Publication Date: 2019-01-02
• Subjects: Chelonian -- corticosterone -- glucose -- soft release -- stress -- transportation; Nature -- Effect of human beings on -- Periodicals; Conservation biology -- Periodicals; 577.05
• DOI: 10.1093/conphys/coy065
• Languages: English
• ISSNs: 2051-1434

Abstract

Abstract : Kemp's ridley sea turtles placed for <6 h in unfamiliar saltwater pools after ground transport exhibited normalization of plasma glucose and potassium, as well as partial improvements in corticosterone and immune measures. A brief period in saltwater pools may help sea turtles recover from transport stress prior to release to sea. Abstract: Sea turtle rehabilitation clinics and aquaria frequently transport stranded sea turtles long distances out of water, e.g. for release at sites with appropriate water temperatures. Endangered Kemp's ridley turtles ( Lepidochelys kempii ) are known to exhibit an adrenal stress response during such transports. In an opportunistic study of turtles transported by road from Massachusetts to Georgia for release, we tested whether placing turtles in saltwater pools for short periods after transport would help turtles recover from transport-related stress. Eighteen juvenile Kemp's ridley turtles were examined and blood samples collected (1) immediately pre-transport, (2) immediately post-transport and (3) after a 6 h ( n = 9) or 24 h ( n = 9) post-transport period in unfamiliar pools, after which all turtles were released to the sea. Blood samples were analyzed for corticosterone, glucose, total white blood cell (WBC) count, heterophil/lymphocyte (H/L) ratio, pH, pO2, pCO2, HCO3 (bicarbonate), sodium, potassium, ionized calcium, lactate and hematocrit. Though the majority of turtles remained in good clinical condition, corticosterone, glucose, WBC and H/L elevated significantly during transport, while potassium declined slightly but significantly. After at least 6 h in a saltwater pool, potassium and glucose returned to pre-transport baselines and corticosterone partially recovered toward baseline. Extending the pool time to 24 h did not markedly enhance the physiological recovery of turtles, and two immune measures (WBC, H/L) remained elevated from the effect of transport. Six hours in a saltwater pool appears to facilitate the recovery of Kemp's ridley sea turtles from transport-related stress and may therefore improve their readiness for release.