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Lucille G Alexander

Lucille G Alexander
Independent Researcher

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23
Publications
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1,825
Citations

Publications

Publications (23)
Article
Full-text available
Tocopherol is assumed to be the most biologically active dietary antioxidant in vivo, but despite its potential importance little is known about its impacts on wild birds. Reproduction is presumed to be costly for parents through several routes, including increased oxidative stress, particularly for bird species producing large clutches. If dietary...
Article
‘Personality traits’ are behavioural differences between individuals that are stable within individuals. Different combinations of personality traits can correlate with fitness variation but the mechanisms remain unclear. There is the suggestion that personality reflects variation in physiology. For example, ‘fast’ (bold, active, fast exploring) in...
Poster
The dog is used as a model for human skeletal research, with the assumption that calcium (Ca) and phosphorus (P) metabolism are similar between species. A prior meta-analysis of Ca intake and faecal excretion suggested that adult dogs are unable to adapt their Ca digestibility to Ca intake, meaning dogs lack the ability to increase Ca digestibility...
Article
The dog is used as a model for human skeletal research, with the assumption that calcium (Ca) and phosphorus (P) metabolism are similar between species. A prior meta‐analysis of Ca intake and faecal excretion suggested that adult dogs are unable to adapt their Ca digestibility to Ca intake, meaning dogs lack the ability to increase Ca digestibility...
Article
When animals encounter new food, they must decide whether to eat it and risk being poisoned, or avoid it but risk losing valuable food resources. Some individuals within a foraging population are ‘adventurous consumers’ and readily accept novel food items into their diets, while others display an active and long-term avoidance of novel food, called...
Article
Background: Risk of nutrient deficiency in dogs during caloric restriction is not currently known, while obesity is a growing concern. Objectives: To determine nutrients that might require further evaluation for the risk of deficiency during caloric restriction. Animals and methods: Five commercially available canine diets, representing a rang...
Article
Aqua feeds should be formulated to provide complete and balanced nutrition to achieve optimal health and growth in fish, including adequate levels of essential amino acids (EAA). There are few or no data relating to the EAA requirements for ornamental fish species, with the majority of quantitative data for these nutrients being available for comme...
Article
Clinical haematology and blood plasma chemistry can be used as a valuable tool to provide substantial diagnostic information for fish. A wide range of parameters can be used to assess nutritional status, digestive function, disease identification, routine metabolic levels, general physiological status and even the assessment and management of wild...
Article
Full-text available
To understand the effects of neutering on food intake, body weight (BW) and body composition in kittens, data from an unrelated study were subjected to post hoc analysis. A total of twelve pairs of 11-week-old female littermates were randomly assigned to either a neutered group (neutered at 19 weeks old) or an entire group (kept entire) and offered...
Article
Full-text available
Where behavioural responses differ consistently between individuals, this is termed 'personality'. There is the suggestion, but with little supporting data, that personality traits reflect underlying variation in physiology. Here, we tested whether greenfinches Carduelis chloris differing in personality traits differed in various plasma indices of...
Article
Full-text available
Using featural cues such as colour to identify ephemeral food can increase foraging efficiency. Featural cues may change over time however; therefore, animals should use spatial cues to relocate food that occurs in a temporally stable position. We tested this hypothesis by measuring the cue preferences of captive greenfinches Carduelis chloris when...
Article
Full-text available
During mate choice, individuals are predicted to assess traits that honestly signal the quality of potential partners. Locomotor capacity may be such a trait, potentially signalling condition and ability to resist oxidative damage. In this study, we experimentally manipulated nutritional status: Male wild-type budgerigars, imported from Australia,...
Article
Full-text available
Carotenoid pigments are responsible for many of the red, yellow and orange plumage and integument traits seen in birds. One idea suggests that since carotenoids can act as antioxidants, carotenoid-mediated colouration may reveal an individual's ability to resist oxidative damage. In fact, there is currently very little information on the effects of...
Article
To investigate the ecological significance of personality, researchers generally measure behavioural traits in captivity. Whether behaviour in captivity is analogous to behaviour in the wild, however, is seldom tested. We compared individual behaviour between captivity and the wild in blue tits, Cyanistes caeruleus. Over two winters, 125 blue tits...
Article
After intense physical activity animals generally experience a rise in metabolic rate, which is associated with a proliferation of pro-oxidants. If unchecked, these pro-oxidants can cause damage to DNA and peroxidation of lipids in cell walls. Two factors are thought to ameliorate post-exercise oxidative damage, at least in mammals: dietary antioxi...
Article
Full-text available
Antioxidants are known to play an important role in quenching reactive oxygen species (ROS), thus ameliorating oxidative stress. Since increased metabolism associated with exercise can increase oxidative stress, dietary antioxidants may be a limiting factor in determining aspects of physical performance. Here we tested whether oxidative stress asso...
Article
Full-text available
Feeding regimens for horses are usually based on perceived workload (PW) together with body condition. This can lead to inappropriate energy intake and, in particular, excess weight. Therefore, a more detailed understanding of the factors influencing individual energy needs under practical field conditions would be valuable. The purpose of this stu...
Article
Full-text available
Climacteric fruit ripening is regulated by the phytohormone ethylene. ETHYLENE-INSENSITIVE3 (EIN3) is a transcription factor that functions downstream from the ethylene receptors in the Arabidopsis ethylene signal transduction pathway. Three homologues of the Arabidopsis EIN3 gene have been identified in tomato, Lycopersicon esculentum, EIN3-like o...
Article
Full-text available
Elucidating the mechanisms involved in ripening of climacteric fruit and the role that ethylene plays in the process are key to understanding fruit production and quality. In this review, which is based largely on research in tomato, particular attention is paid to the role of specific isoforms of ACC synthase and ACC oxidase in controlling ethylen...
Article
Full-text available
The oleosins are a group of hydrophobic proteins present on the surface of oil bodies in seeds, where they are thought to prevent coalescence. They contain a central hydrophobic domain of 68-74 residues that is thought to form a loop into the triacylglycerol matrix of the oil body, but the conformation adopted by this sequence is uncertain. We have...

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