scholarly journals Litter Size Variation in Polish Selected Small Dog Breeds

2015 ◽  
Vol 14 (3) ◽  
pp. 3953 ◽  
Author(s):  
Małgorzata Goleman ◽  
Mirosław Karpiński ◽  
Piotr Czyżowski ◽  
Leszek Drozd
Keyword(s):  
Litter Size ◽  
Size Variation

Litter size variation in didelphid marsupials: evidence of phylogenetic constraints and adaptation

2018 ◽  
Vol 126 (1) ◽  
pp. 40-54 ◽  
Author(s):  
Thaís Battistella ◽  
Felipe Cerezer ◽  
Jamile Bubadué ◽  
Geruza Melo ◽  
Maurício Graipel ◽  
...  
Keyword(s):  
Litter Size ◽  
Size Variation ◽  
Phylogenetic Constraints

scholarly journals Does Litter Size Variation Affect Models of Terrestrial Carnivore Extinction Risk and Management?

PLoS ONE ◽  
2013 ◽  
Vol 8 (2) ◽  
pp. e58060 ◽  
Author(s):  
Eleanor S. Devenish-Nelson ◽  
Philip A. Stephens ◽  
Stephen Harris ◽  
Carl Soulsbury ◽  
Shane A. Richards
Keyword(s):  
Litter Size ◽  
Extinction Risk ◽  
Size Variation ◽  
Terrestrial Carnivore

scholarly journals Testing hypotheses of marsupial brain size variation using phylogenetic multiple imputations and a Bayesian comparative framework

2021 ◽  
Vol 288 (1947) ◽  
Author(s):  
Orlin S. Todorov ◽  
Simone P. Blomberg ◽  
Anjali Goswami ◽  
Karen Sears ◽  
Patrik Drhlík ◽  
...  
Keyword(s):  
Litter Size ◽  
Brain Size ◽  
Size Variation ◽  
Reproductive Traits ◽  
Mammalian Brain ◽  
Gestation Length ◽  
High Coverage ◽  
Ecological Predictors ◽  
Size Evolution ◽  
Relative Brain Size

Considerable controversy exists about which hypotheses and variables best explain mammalian brain size variation. We use a new, high-coverage dataset of marsupial brain and body sizes, and the first phylogenetically imputed full datasets of 16 predictor variables, to model the prevalent hypotheses explaining brain size evolution using phylogenetically corrected Bayesian generalized linear mixed-effects modelling. Despite this comprehensive analysis, litter size emerges as the only significant predictor. Marsupials differ from the more frequently studied placentals in displaying a much lower diversity of reproductive traits, which are known to interact extensively with many behavioural and ecological predictors of brain size. Our results therefore suggest that studies of relative brain size evolution in placental mammals may require targeted co-analysis or adjustment of reproductive parameters like litter size, weaning age or gestation length. This supports suggestions that significant associations between behavioural or ecological variables with relative brain size may be due to a confounding influence of the extensive reproductive diversity of placental mammals.

Effects of Elevation on Litter-Size Variation Among Lizard Populations in theSceloporus grammicusComplex (Phrynosomatidae) in Mexico

2011 ◽  
Vol 71 (2) ◽  
pp. 215-221 ◽  
Author(s):  
Aurelio Ramírez-Bautista ◽  
Adrian Leyte-Manrique ◽  
Jonathon C. Marshall ◽  
Geoffrey R. Smith
Keyword(s):  
Litter Size ◽  
Size Variation

scholarly journals Testing hypotheses of marsupial brain size variation using phylogenetic multiple imputations and a Bayesian comparative framework

2021 ◽  
Author(s):  
Orlin S. Todorov ◽  
Simone P. Blomberg ◽  
Anjali Goswami ◽  
Karen Sears ◽  
Patrik Drhlík ◽  
...  
Keyword(s):  
Litter Size ◽  
Brain Size ◽  
Size Variation ◽  
Reproductive Traits ◽  
Mammalian Brain ◽  
Gestation Length ◽  
High Coverage ◽  
Ecological Predictors ◽  
Size Evolution ◽  
Relative Brain Size

AbstractConsiderable controversy exists about which hypotheses and variables best explain mammalian brain size variation. We use a new, high-coverage dataset of marsupial brain and body sizes, and the first phylogenetically imputed full datasets of 16 predictor variables, to model the prevalent hypotheses explaining brain size evolution using phylogenetically corrected Bayesian generalised linear mixed-effects modelling. Despite this comprehensive analysis, litter size emerges as the only significant predictor. Marsupials differ from the more frequently studied placentals in displaying much lower diversity of reproductive traits, which are known to interact extensively with many behavioural and ecological predictors of brain size. Our results therefore suggest that studies of relative brain size evolution in placental mammals may require targeted co-analysis or adjustment of reproductive parameters like litter size, weaning age, or gestation length. This supports suggestions that significant associations between behavioural or ecological variables with relative brain size may be due to a confounding influence of the extensive reproductive diversity of placental mammals.

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