Results 41 to 50 of about 137,492 (222)

On Intraspecific and Interspecific Variation in Teleost Scleral Ossification [PDF]

open access: yesThe Anatomical Record, 2019
ABSTRACTScleral ossicles are bony elements found along the eyes of many fishes, amphibians, and reptiles. These bones provide a superficial layer of support to the eye and may facilitate visual acuity. Previous research has shown that scleral ossicle diversity is generally limited among teleosts, but that scleral ossicles have been lost numerous times ...
Gabriel H. Kindl, Kelly E. O'Quin
openaire   +2 more sources

Grasses and the resource availability hypothesis: the importance of silica-based defences [PDF]

open access: yes, 2007
The resource availability hypothesis (RAH) predicts that allocation of resources to anti-herbivore defences differs between species according to their growth rate.
Ennos, Roland A.   +2 more
core   +2 more sources

Size dimorphism and directional selection in forest millipedes [PDF]

open access: yesArthropods, 2019
Sexual Size Dimorphism (SSD) in the diplopod genus Centrobolus has a positive correlation with body size. Length, width and rings are the main components of interspecific variation in diplopod species.
Mark Cooper
doaj  

Inter‐ and intraspecific variation in mycotoxin tolerance: A study of four Drosophila species

open access: yesEcology and Evolution, 2022
Many mycophagous Drosophila species have adapted to tolerate high concentrations of mycotoxins, an ability not reported in any other eukaryotes. Although an association between mycophagy and mycotoxin tolerance has been established in many Drosophila ...
Prajakta P. Kokate   +4 more
doaj   +1 more source

Haplogenome assembly reveals structural variation in Eucalyptus interspecific hybrids

open access: yesGigaScience, 2022
Abstract Background De novo phased (haplo)genome assembly using long-read DNA sequencing data has improved the detection and characterization of structural variants (SVs) in plant and animal genomes. Able to span across haplotypes, long reads allow phased, haplogenome assembly in highly outbred
Anneri Lötter   +5 more
openaire   +3 more sources

Sexually size dimorphic brains and song complexity in passerine birds [PDF]

open access: yes, 2004
Neural correlates of bird song involve the volume of particular song nuclei in the brain that govern song development, production, and perception. Intra- and interspecific variation in the volume of these song nuclei are associated with overall brain ...
Eens, Marcel   +3 more
core   +2 more sources

Ecological Opportunity In Adaptive Radiation Of Galapagos Endemic Land Snails [PDF]

open access: yes, 2009
The classic evolutionary hypothesis of ecological opportunity proposes that both heterogeneity of resources and freedom from enemies promote phenotypic divergence as a response to increased niche availability.
Crespi, Bernard J., Parent, Christine E.
core   +1 more source

Trait-Based Community Assembly along an Elevational Gradient in Subalpine Forests: Quantifying the Roles of Environmental Factors in Inter- and Intraspecific Variability.

open access: yesPLoS ONE, 2016
Understanding how communities respond to environmental variation is a central goal in ecology. Plant communities respond to environmental gradients via intraspecific and/or interspecific variation in plant functional traits.
Ya-Huang Luo   +7 more
doaj   +1 more source

Intra- and inter-isolate variation of ribosomal and protein-coding genes in Pleurotus: implications for molecular identification and phylogeny on fungal groups

open access: yesBMC Microbiology, 2017
Background The internal transcribed spacer (ITS), RNA polymerase II second largest subunit (RPB2), and elongation factor 1-alpha (EF1α) are often used in fungal taxonomy and phylogenetic analysis.
Xiao-Lan He   +9 more
doaj   +1 more source

Conventional niche overlap measurements are not effective for assessing interspecific competition

open access: yesFrontiers in Ecology and Evolution, 2023
Interspecific competition is notoriously difficult to detect and quantify, especially in species that are wide-ranging or otherwise difficult to track in the wild.
Dennis L. Murray   +3 more
doaj   +1 more source

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