Thermal Tempering Does Not Increase the Survival of Eyed Salmonid Eggs
Open Access
- 1 January 2021
- journal article
- Published by Scientific Research Publishing, Inc. in Open Journal of Applied Sciences
- Vol. 11 (03), 287-293
- https://doi.org/10.4236/ojapps.2021.113021
Abstract
Eyed salmonid eggs can be subjected to large temperature swings during development, particularly when shipped in ice-filled containers from broodstock facilities to production hatcheries. This study examined the effect of thermal tempering on the survival of brown trout Salmo trutta and rainbow trout Oncorhynchus mykiss eyed eggs to hatch. Eyed eggs at 1°C were either directly placed in 11°C water or allowed to thermally temper from 1°C to 11°C gradually over an hour. In addition, each of the tempering treatments occurred either with or without a 10-minute iodophor disinfection treatment. Tempering had no significant effect on survival-to-hatch in either species (85% - 97%). However, survival was significantly lower in rainbow trout eggs subjected to iodine disinfection (73% - 75%) compared to non-disinfected eggs (91% - 97%), likely because of the close proximity to hatch. The results of this study indicate that slowly raising the temperature (thermal tempering) of brown trout and rainbow trout eyed eggs is unnecessary. Additionally, iodine disinfection of eyed salmonid eggs in close proximity to hatching should be avoided.Keywords
This publication has 21 references indexed in Scilit:
- Increasing Iodine Concentrations during Landlocked Fall Chinook Salmon Egg Disinfection Decrease Bacterial Numbers with No Impact on Egg SurvivalNorth American Journal of Aquaculture, 2018
- Incubation of Landlocked Fall Chinook Salmon Eggs in Petri DishesNorth American Journal of Aquaculture, 2017
- Effects of incubation temperatures on embryonic and larval survival in rainbow trout, Oncorhynchus mykissJournal of Applied Aquaculture, 2016
- Effect of Single or Double Exposures to Hydrogen Peroxide or Iodine on Salmonid Egg Survival and Bacterial GrowthNorth American Journal of Aquaculture, 2012
- Heat shock during early somitogenesis induces caudal vertebral column defects in Atlantic salmon (Salmo salar)Wilhelm Roux' Archiv für Entwicklungsmechanik der Organismen, 2005
- Russell, Hugo & Ayliffe's Principles and Practice of Disinfection, Preservation & SterilizationPublished by Wiley ,2004
- Thermal dependence of embryonic growth and development in brown troutJournal of Fish Biology, 2003
- Heat shock produces periodic somitic disturbances in the zebrafish embryoMechanisms of Development, 1999
- Toxicity of iodine, iodide, and iodate to Daphnia magna and rainbow trout (Oncorhynchus mykiss)Archives of Environmental Contamination and Toxicology, 1995
- The toxicity of iodophors to salmonid eggsAquaculture, 1984