Exact(8)
The current study provides data on the relative breeding success of male salmon that are applicable to such predictive quantitative models.
One study of coho salmon representing a similar broodstock management scenario (i.e. domesticated stock compared to a nonlocal wild population) used behavioral measures and estimated reduced relative breeding success (males 0.62; females 0.82) that was similar to the adult-to-subyearling relative fitness of steelhead (75 78%) in the one study that measured it (Leider et al. 1990).
Relative breeding values (RBV's) for NRR was obtained from the Swedish Dairy Association.
The 8,238 examined horses were used as reference population (mean EBV = 100) for calculations of the relative breeding values.
A statistically significant difference between carriers and non-carriers in the relative breeding value for NRR was observed for 168 days NRR (101.1 ± 0.9 vs. 103.1 ± 0.6, p < 0.05).
The index of stillbirth is expressed as a relative breeding value (RBV) with a mean of 100, which results in close to 11% of stillbirth in the first calvings.
Similar(52)
The Alpine chough lays its eggs about one month later than its relative, although breeding success and reproductive behaviour are similar.
Our analyses suggested that recruitment of lesser scaup into the fall flyway populations differed according to latitudinal zone in the Boreal, with the northern Boreal showing the lowest recruitment relative to breeding population abundance.
The importance of wheat as a crop and the extensive use of wild wheat relatives in breeding programs has prompted many years of cytogenetic and genetic research to develop an understanding of the control of chromosome pairing and recombination.
Those encompassed both measures of "static" environmental heterogeneity, such as the relative position of the breeding site relative to the habitat edge, or oak richness within 50 meters of the nestbox, as well as dynamic measures, such as population density, or annual synchronisation with caterpillar peaks (main food source for nestlings) etc.
Theoretical studies suggest that the relative costs of breeding to males and females, in terms of reduced future reproductive potential or increased mortality, will influence the relative strengths of mate choice in the sexes [45] [47].
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