Results 1 to 10 of about 70 (66)
Toxicity and Taste: Unequal Chemical Defences in a Mimicry Ring [PDF]
Proceedings of the Royal Society B: Biological Sciences, 2018 Mimicry of warning signals is common, and can be mutualistic when mimetic species harbour equal levels of defence (Müllerian), or parasitic when mimics are undefended but still gain protection from their resemblance to the model (Batesian). However, whether chemically defended mimics should be similar in terms of toxicity (i.e.
Martin J How +2 more
exaly +7 more sources
Species with a chemical defence, but not chemical offence, live longer [PDF]
Journal of Evolutionary Biology, 2013 AbstractEvolutionary hypotheses for ageing generally predict that delayed senescence should evolve in organisms that experience lower extrinsic mortality. Thus, one might expect species that are highly toxic or venomous (i.e. chemically protected) will have longer lifespans than related species that are not likewise protected.
Hossie, Thomas +3 more
openaire +2 more sources
Predator‐induced changes in the chemical defence of a vertebrate [PDF]
Journal of Animal Ecology, 2019 Abstract1. Inducible defences are ubiquitous in the animal kingdom, but little is known about facultative changes in chemical defences in response to predators, especially so in vertebrates.2. We tested for predator‐induced changes in toxin production of larval common toads (Bufo bufo), which are known to synthesize bufadienolide compounds.3.
Hettyey, Attila +8 more
openaire +6 more sources
Chemical Defence and Toxins of Plants [PDF]
, 2010 Higher plants protect themselves by producing a variety of secondary metabolites and proteins that are involved in defense against herbivores as well as microbial pathogens. Concerning microbial pathogenesis in plants, in many cases, it is known that phytotoxins that are produced by plant pathogens play an important role in disease development causing ...
Yamane, H. +5 more
openaire +3 more sources
Inducible chemical defences in animals [PDF]
Oikos, 2014 Phenotypic plasticity is extremely widespread in the behaviour, morphology and life‐history of animals. However, inducible changes in the production of defensive chemicals are described mostly in plants and surprisingly little is known about similar plasticity in chemical defences of animals. Inducible chemical defences may be common in animals because
Hettyey, Attila +2 more
openaire +3 more sources
Pure and Applied Chemistry, 1986 Abstract
Braekman, Jean Claude, Daloze, Désiré
openaire +2 more sources
Chemical Defence by Sterols in the Freshwater Ciliate Stentor polymorphus
Biology, 2022 Heterotrich ciliates typically retain toxic substances in specialized ejectable organelles, called extrusomes, which are used in predator-prey interactions. In this study, we analysed the chemical defence strategy of the freshwater heterotrich ciliate Stentor polymorphus against the predatory ciliate Coleps hirtus, and the microturbellarian flatworm ...
Federico Buonanno +5 more
openaire +4 more sources
Bile acids in physico-chemical host defence
Pathophysiology, 2004 The discovery of the physico-chemical host defence is closely connected with the endotoxin research. It is well known that the toxic effects of endotoxins under experimental conditions can be induced only when they are administered parenterally. However, in naturally occurring entero-endotoxemic diseases (e.g.
openaire +2 more sources
Chemical antipredator defence is linked to higher extinction risk [PDF]
Royal Society Open Science, 2016 Many attributes of species may be linked to contemporary extinction risk, though some such traits remain untested despite suggestions that they may be important. Here, I test whether a trait associated with higher background extinction rates, chemical antipredator defence, is also associated with current extinction risk, using amphibians as a model ...
openaire +5 more sources
Chemical toxins and body defences.
Biologist (London, England), 2002 Without realising it, we are all exposed to a wide range of toxins every day. Some are a natural part of our diet and environment and some are man-made. Over evolutionary time, biochemical pathways are developed that have allowed our bodies to cope with this onslaught.
openaire +2 more sources