ISSN:
1573-3297
Keywords:
behavior genetics
;
mobility
;
positioning
;
inheritance
;
fish
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Psychology
Notes:
Abstract The inheritance of mobility and positioning characteristics of F1 and back-cross hybrids of lake charr (Salvelinus namaycush) and brook charr (S. fontinalis) was investigated. Hybrids showed a closer affinity to brook charr for mobility measurements in that they spent more total time stationary in periods of longer duration than did the lake charr. This suggests either a directional dominance or a response to water flow. Lake, brook, and reciprocal hybrid charr held mean positions within the central section of the water column and did not vary significantly from each other in their mean vertical positions. However, there were significant differences in mean horizontal coordinates across charr types in that lake charr and F1 hydrids occupied positions midway along a laboratory stream channel, while brook charr occupied downstream positions. Even though there were no significant differences between the parental species in either means or standard errors of vertical and horizontal positioning, hybrid phenotypes varied significantly from both parents. Reciprocal effects were observed for variability of horizontal positions. A bivariate ANOVA revealed that horizontal measures were of greater importance than vertical measures in discriminating between charr types. It is likely that both genetic and environmental factors are responsible for the characteristic differences in mobility and positioning between brook and lake charr.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01065670
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