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您的检索式：作者名="Edwin L.COOPER"
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| 1 | A short note on how tied fights affect cortisol levels显示文摘Previous work exploring the interrelationships between sex steroids(e.g.androgens,testosterones and 11-ketotestosterones)and social behavior in teleosts suggest that mirror-elicited aggression in cichlid fish may not trigger a hormonal response.Using the Mozambique tilapia(Oreochromis mossambicus)to analyze immune responses as a result of social stress,we measured levels of cortisol and melatonin using Enzyme-Linked Immunosorbent Assay(ELISA)assays.In this work,we demonstrated that cortisol concentrations are significantly lower yet the levels of melatonin remain unchanged in tilapia that are fighting their mirror image.Our results suggested that in tied fights,certain hormone levels remain unchanged(e.g.androgens)due to the lack of melatonin induction. | Edwin L.COOPER Kathy T.NGO | 2013 | Integrative Zoology2013，8，3： | 0 |
| 2 | Comparative immunology显示文摘As a discipline,comparative immunology enhances zoology and has gained wide acceptance in the biological sciences.It is an offshoot of the parent field,immunology,and is an amalgam of immunology and zoology.All animals from protozoans to humans have solved the threat of extinction by having evolved an immune-defense strategy that ensures the capacity to react against foreign,non-self microorganisms and cancers that disturb the homeostatic self.Invertebrate-type innate immune responses evolved first and they characterize the metazoans.These rapid natural responses act immediately and are often essential for the occurrence of slower,more specific,adaptive vertebratetype immune responses.As components of the innate immune system,there is an emphasis on several major steps in the evolutionary process:(i)recognition;(ii)the phagocytic cell;and(iii)the natural killer cell.When vertebrates evolved,beginning with fish,thymus-controlled T cells first appeared,as did bone marrow-derived B cells(first found in amphibians with long bones).These were the precursors of the plasma cells that synthesize and secrete antibodies.Confirming the concept of self/non-self,invertebrates possess natural,non-adaptive,innate,non-clonal,non-anticipatory immune responses,whereas vertebrates possess adaptive,acquired,clonal,and anticipatory responses.This symposium concerns:(i)aspects of the immune spectrum in representative groups;(ii)specific findings(in particular models;e.g.earthworms);(iii)clues as to the possible biomedical application of relevant molecules derived from animals,notably invertebrates;and(iv)some views on the more practical applications of understanding immune systems of invertebrates and ectotherms,and their possible role in survival. | Edwin L.COOPER | 2006 | Integrative Zoology2006，1，1： | 0 |
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