Journal of Aquaculture Research & Development

Ryan L Earley

Publications

• Research Article
  The Impact of Water Exchange Rate and Treatment Processes on Water-Borne Hormones in Recirculation Aquaculture Systems Containing Sexually Maturing Atlantic Salmon Salmo salar
  Author(s): Christopher Good, John Davidson, Ryan L Earley, Elizabeth Lee and Steven SummerfeltChristopher Good, John Davidson, Ryan L Earley, Elizabeth Lee and Steven Summerfelt
  
  A controlled seven-month study was conducted in six replicated water recirculation aquaculture systems (WRAS) to assess post-smolt Atlantic salmon (Salmo salar) performance in relation to WRAS water exchange rate. Unexpectedly high numbers of precocious sexually mature fish were observed in all WRAS toward the end of the study period; therefore, a separate investigation was conducted to quantify the levels of water-borne hormones (cortisol (C), testosterone (T), 11-ketotestosterone (11-KT), progesterone (P), and estradiol (E2)) to determine the impact of WRAS exchange rate, as well as transit through the unit processes, on soluble hormone concentrations.Triplicate water samples were collected at three separate sites in each of the six WRAS: pre-unit processes, post-unit processes, and at the makeup water influent. Water samples were concentrated and separate quantifications wer.. View More»
  DOI: 10.4172/2155-9546.1000260

  Abstract PDF