Sentence examples for rearing hatchery from inspiring English sources

However, the lifetime performance of second generation hatchery and wild fish in Reisenbichler and McIntyre (1977) differed in only two of four stream comparisons (where hatchery fish survival was lower), and the Unwin (1997) study was confounded by rearing hatchery fish for 8 12 months in captivity before release into the wild (from Brannon et al. 2004; Table 6).

Releases of conventionally reared hatchery steelhead pose ecological risks to wild steelhead populations.

Specifically, they compared captive-reared wild × wild crosses with captive-reared hatchery × wild crosses (again, from the same population; egg-to-juvenile stage captive rearing).

Thus, an experimental population with the parents taken directly from a wild population, mated in a hatchery, offspring reared in the hatchery until final rearing in a net-pen in saltwater where the traits of interest were measured would be designated as a wild broodstock source and farmed treatment.

Several improvements in hatchery rearing technology and use of broodstock have been occurred in the last decades (Theodorou 2002; Pavlidou 2009).

The two hatchery rearing groups had 100 individuals from each full-sibling group, as they had a much greater expected survival rate than those reared naturally.

Reducing hatchery rearing densities may be used to accelerate smolt development when required, as this would reduce cortisol levels and increase levels of growth hormone [31].

Manipulating hatchery rearing conditions allowed us to experimentally evaluate the relative importance of such phenological (match mismatch) and ontogenetic (ready-or-not) selection under early stocking conditions.

While there is a need for a comprehensive consideration of whether supplementation hatchery programs are worth operating in general (Waples and Drake 2004), in this review we focus more narrowly on just the fitness effects of hatchery rearing.

Overall, these results emphasize the dynamic impacts of both natural processes and hatchery rearing on effective size, the significance of multigenerational monitoring, and the need to understand the factors influencing the success of supportive breeding programs as a whole.

Hatchery rearing to the fry stage largely bypasses high embryo and larval mortality that occurs in redds over winter, and stocking fry seeks to increase the number available to enter the critical period of transition to exogenous feeding.