Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 14 of 14 for “"intra-specific variation"”.
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Colouration evo-devo: the developmental basis of intra-specific variation in cichlid pigmentation
… of the development a trait exhibiting adaptive variation. Cichlid egg-spots are a well-suited model for investigating the development of diversifying traits. Evolving under sexual selection, egg-spots are dense aggregations of xanthophores and iridophores on haplochromine cichlid anal fins, …
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Spatial variation in functional traits and grazing value of savanna grasses at the community and species level
… assumed to vary strongly between species, with intra-specific variation in grazing quality often ignored, resulting in grass species often uniformly being categorized as being of high or low grazing quality. There is, however, an increasing debate about the validity of this approach since many …
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Consumer nutrient stoichiometry : patterns, homeostasis, and links with fitness.
… a logical starting point. Chapter three examines intra-‐specific variation in consumer-‐resource stoichiometries at a suite of sites within a river network. In contrast to previous work, this chapter describes wide intra-‐ specific variation in consumer stoichiometry, similar in magnitude to …
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Intertwined evolution of swimming, morphology and microhabitat in tree frogs from the subfamily Hylinae
… In addition, there is a high rate of inter- and intra- specific variation in swimming behavior and performance. Therefore, our results have important implications for the study of tree frog evolution and habitat selection.
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The biology and taxonomy of Mesozoic stromatoporoids
… framework. Synonyms are documented and intra-specific variation discussed. The present cnidarian-based nomenclature is replaced by one modified from Recent poriferan terminology. The possession of a calcareous skeleton is probably a relict feature of a previously widespread calcified …
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Physiological Diversity of Centrarchid Fishes
… research was assessing the inter- and intra-specific physiological diversity of centrarchid fishes (freshwater sunfish), and examining how this variation shapes their conservation needs. To evaluate inter-specific physiological diversity, an integrated field and laboratory study was …
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Life history, growth and dental development in young primates: a study using captive rhesus macaques
A study of the variation in infantphysical development was undertaken in a colony of captive rhesus macaques (Macaca mulatta). Somatic growth and dental development in 32 infants born in 1987 and 1988 were regularly monitored between 1987 and 1990. Physical characteristics of the mothers of each …
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An Investigation of Seed Longevity and Antioxidant Changes of Conserved Barley Germplasm
… a flexible modelling approach. Seedling lengths, variation in viability and lengths were analyzed in parallel with the viability model as a novel approach to longevity prediction. To account for intra-specific variation, modelling was also performed within several biological subcategories. …
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The evolution and diversification of Pleistocene Homo
… focused on making distinctions between inter-and intra-specific variation, with relatively poor understanding of population structure or the evolutionary forces which have shaped the complex phenotypic diversity within our genus. The focus of this thesis is to expand our current understanding of …
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Variation in breeding systems and consequences for reproductive traits in Erica
… 90 000km². Erica species have great inter- and intra-specific variation in floral form as well as in post-fire regeneration strategies. Previous studies of other plant groups (Barrett et al. 1996; Button et al. 2012) have illustrated changes in floral traits with a shift from outcrossing to …
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A multi-scale exploration of the drivers and implications of germination strategy in Australian alpine plants
… change I also examined how within-species variation in germination strategy might affect the adaptability or plasticity of species in response to climate change. I examined the germination strategy variation within-species to specify the climate variables driving variation in germination …
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A multi-scale exploration of the drivers and implications of germination strategy in Australian alpine plants
… change I also examined how within-species variation in germination strategy might affect the adaptability or plasticity of species in response to climate change. I examined the germination strategy variation within-species to specify the climate variables driving variation in germination …
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Cretaceous ostracoda of the super family Cytheracea from Iraq, their biostratigraphy and correlation with adjacent regions
… Eastern and North African countries. Problems of variation in the size of some ostracods have been studied. There is a considerable range in size of Peloriops (Peloriops) ulosa, Rehacythereis arabica, Brachycythere basrahaensis sp. nov., Archeocosta alkhazwinii, Veeniacythereis maghrebensis, and …
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The consequences and implications of ecology on body size distributions in social insects
… in approximately 13% of ant species worker variation is large enough that the worker caste can be subdivided into sub-castes based on size and shape. For these polymorphic species, body size is both an individual and a colony-level trait (distribution of worker body sizes). Ants are …