Review paper: Seasonal variation as a determinant of population structure in rotifers reproducing by cyclical parthenogenesis

1998 ◽  
pp. 361-372 ◽  
Author(s):  
Charles E. King ◽  
Manuel Serra
Keyword(s):  
Population Structure ◽  
Seasonal Variation ◽  
Review Paper ◽  
Cyclical Parthenogenesis

Seasonal variation in the population structure of the freshwater prawn Macrobrachium brasiliense (Decapoda: Palaemonidae) in a neotropical region

Nauplius ◽  
2021 ◽  
Vol 29 ◽  
Author(s):  
Caio Santos Nogueira ◽  
Douglas Fernandes Rodrigues Alves ◽  
Rogerio Caetano Costa ◽  
Ariádine Cristine Almeida
Keyword(s):  
Population Structure ◽  
Seasonal Variation ◽  
Neotropical Region ◽  
Freshwater Prawn

Seasonal variation in genetic population structure of sábalo (Prochilodus lineatus) in the Lower Uruguay River

Genetica ◽  
2013 ◽  
Vol 141 (7-9) ◽  
pp. 401-407 ◽  
Author(s):  
Eva Carolina Rueda ◽  
Pedro Carriquiriborde ◽  
Alexander Miguel Monzón ◽  
Gustavo M. Somoza ◽  
Guillermo Ortí
Keyword(s):  
Population Structure ◽  
Seasonal Variation ◽  
Genetic Population Structure ◽  
Genetic Population ◽  
Prochilodus Lineatus ◽  
Uruguay River

Raciation in Epacris impressa. III. Polymorphic populations

1977 ◽  
Vol 25 (3) ◽  
pp. 325 ◽  
Author(s):  
HM Stace ◽  
YJ Fripp
Keyword(s):  
Population Structure ◽  
Seasonal Variation ◽  
Flowering Time ◽  
Hybrid Origin ◽  
Disruptive Selection ◽  
Seasonal Differences ◽  
The Mean

Polymorphic populations occur throughout most of the distribution of E. impressa Labill., in which pink-flowered plants and white-flowered plants grow intermixed in the same locality. Measurements of corolla lengths indicate that these are panmictic populations: there is no difference between the mean lengths of pink and white corollas. In homogeneous populations (the vast majority) there is no seasonal variation in the flowering times of white-flowered bushes and pink-flowered bushes. At Wilson's Promontory polymorphic scarlet/pink/white populations occur near polymorphic pinklwhite populations and monomorphic scarlet populations. Some of these triple polymorphic populations show heterogeneity of population structure, with seasonal differences of flowering time in the different morphs. Polymorphic populations are generally intermediate between monomorphic populations of the different races of E. impressa. It is likely that they are of hybrid origin. The hypothesis that polymorphic populations form a base for disruptive selection into monomorphic populations is also discussed.

Statistics and parallaxes

1978 ◽  
Vol 48 ◽  
pp. 7-29
Author(s):  
T. E. Lutz
Keyword(s):  
Experimental Design ◽  
Statistical Methods ◽  
Review Paper ◽  
Systematic Errors ◽  
Past Experience ◽  
Random Errors ◽  
Trigonometric Parallaxes ◽  
Systematic And Random Errors

This review paper deals with the use of statistical methods to evaluate systematic and random errors associated with trigonometric parallaxes. First, systematic errors which arise when using trigonometric parallaxes to calibrate luminosity systems are discussed. Next, determination of the external errors of parallax measurement are reviewed. Observatory corrections are discussed. Schilt’s point, that as the causes of these systematic differences between observatories are not known the computed corrections can not be applied appropriately, is emphasized. However, modern parallax work is sufficiently accurate that it is necessary to determine observatory corrections if full use is to be made of the potential precision of the data. To this end, it is suggested that a prior experimental design is required. Past experience has shown that accidental overlap of observing programs will not suffice to determine observatory corrections which are meaningful.

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