Results 21 to 30 of about 1,653,876 (262)
Human action shapes the beaks of backyard birds. [PDF]
Proc Natl Acad Sci U S AMarzluff JM.
europepmc +3 more sources
Cephalopod species identification using integrated analysis of machine learning and deep learning approaches [PDF]
PeerJ, 2021 Background Despite the high commercial fisheries value and ecological importance as prey item for higher marine predators, very limited taxonomic work has been done on cephalopods in Malaysia.
Hui Yuan Tan +5 more
doaj +2 more sources
Molecular Shaping of the Beak [PDF]
Science, 2004 Beak shape is a classic example of evolutionary diversification. Beak development in chicken and duck was used to examine morphological variations among avian species. There is only one proliferative zone in the frontonasal mass of chickens, but two in ducks. These growth zones are associated with bone morphogenetic protein 4 (BMP4) activity.
Ping, Wu +4 more
openaire +2 more sources
Animal, 2021 The avian beak is a multipurpose organ playing a vital role in a variety of functions, including feeding, drinking, playing, grasping objects, mating, nesting, preening and defence against predators and parasites.
A. Iqbal, A.F. Moss
doaj +1 more source
Using naturally-occurring variation in beak morphology to reduce feather pecking damage in laying hens [PDF]
, 2023 Outbreaks of severe feather pecking continue to be a serious welfare and economic concern for the poultry industry, particularly within the egg sector.
Struthers, Sarah
core +1 more source
The effect of infrared beak treatment on the welfare of turkeys reared to 12 weeks of age
Poultry Science, 2022 : This study aimed to determine the effects of infrared beak treatment on the behavior and welfare of male and female turkeys reared to 12 wk of age. To do this, poults (236 males and 324 females) were assigned to one of 2 beak treatments: infrared beak ...
S. Struthers +7 more
doaj +1 more source
Beak shape variation in a hybrid species: effects of diet, insularity and species interactions
, 2015 Beak morphology is an ecologically important trait for birds. Beak size and shape are crucial for adapting to new niches and for optimal utilization of existing food sources. The adaptive potential of a species can be limited by the amount of standing genetic variation and by genetic and ontogenetic constraints.
Pineiro Fernandez, Laura
openaire +2 more sources
Animals, 2023 Investigating the ontogenetic variation of biological individuals helps us to fully understand the characteristics of evolution. In order to explore the ontogenetic variation and sexual dimorphism of the beak shape in Octopus minor, Uroteuthis edulis ...
Chao Wang, Zhou Fang
doaj +1 more source
A geometric morphometric appraisal of beak shape in Darwin’s finches [PDF]
Journal of Evolutionary Biology, 2007 AbstractBeak size and shape in Darwin’s finches have traditionally been quantified using a few univariate measurements (length, depth, width). Here we show the improved inferential resolution of geometric morphometric methods, as applied to three hierarchical levels: (i) among seven species on Santa Cruz Island, (ii) among different sites on Santa Cruz
Foster, DJ, Podos, J, Hendry, AP
openaire +3 more sources
Is Beak Morphology in Darwin's Finches Tuned to Loading Demands? [PDF]
PLoS ONE, 2015 One of nature's premier illustrations of adaptive evolution concerns the tight correspondence in birds between beak morphology and feeding behavior. In seed-crushing birds, beaks have been suggested to evolve at least in part to avoid fracture.
Joris Soons +6 more
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