Metabolic disturbances in male broilers of different strains. 2. Relationship between the thyroid and somatotropic axes with growth rate and mortality

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorGonzales, Elisabeth
dc.creatorBuyse, Johan
dc.creatorSartori, José Roberto
dc.creatorLoddi, Maria Marta
dc.creatorDecuypere, Eddy
dc.date2014-05-27T11:19:43Z
dc.date2016-10-25T18:15:39Z
dc.date2014-05-27T11:19:43Z
dc.date2016-10-25T18:15:39Z
dc.date1999-04-01
dc.date.accessioned2017-04-06T00:54:02Z
dc.date.available2017-04-06T00:54:02Z
dc.identifierPoultry Science, v. 78, n. 4, p. 516-521, 1999.
dc.identifier0032-5791
dc.identifierhttp://hdl.handle.net/11449/65749
dc.identifierhttp://acervodigital.unesp.br/handle/11449/65749
dc.identifier10.1093/ps/78.4.516
dc.identifierWOS:000079367800004
dc.identifier2-s2.0-0033110718
dc.identifierhttp://dx.doi.org/10.1093/ps/78.4.516
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/887432
dc.descriptionSeven male broiler strains (Arbor Acres, Avian Farms, Cobb-500, Hubbard-Peterson, ISA, Naked Neck, and Ross) were compared for their growth rate, feed efficiency, and mortality due to sudden death and ascites. In addition, weekly plasma levels of thyroid hormones [3,3′,5-triiodothyronine (T3) thyroxine (T4), T3: T4 ratio, growth hormone (GH), and insulin-like growth factor-I (IGF-I)] were determined. The highly productive, commercial strains were very similar in their endocrine profiles but differed markedly from the Naked Neck chickens. Naked Neck chickens were characterized by higher plasma T3 and lower T4 levels at similar ages as well as when compared on the same body weight basis. The present findings support the hypothesis that the slightly hypothyroid state of high productive broilers renders them more sensitive to metabolic disorders. Naked Neck chickens also had higher plasma GH levels than those of their age-matched commercial broilers. The coefficient of variation for GH was highest for Naked Neck chickens, which is indicative for an amplified GH burst amplitude. It may be stated that changes in plasma thyroid hormone concentration in indirect response to selection for low feed conversion and fast growth may be causatively linked to susceptibility for metabolic disturbances such as sudden death syndrome and ascites.
dc.languageeng
dc.relationPoultry Science
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectBroiler strains
dc.subjectNaked Neck
dc.subjectPerformance
dc.subjectSomatotropic axis
dc.subjectThyroid hormones
dc.subjectgrowth hormone
dc.subjectliothyronine
dc.subjectsomatomedin C
dc.subjectthyroxine
dc.subjectaging
dc.subjectanimal
dc.subjectanimal disease
dc.subjectbird disease
dc.subjectblood
dc.subjectchicken
dc.subjectcomparative study
dc.subjectdeath
dc.subjectgrowth, development and aging
dc.subjectmale
dc.subjectmetabolic disorder
dc.subjectmetabolism
dc.subjectpathophysiology
dc.subjectphysiology
dc.subjectspecies difference
dc.subjectthyroid gland
dc.subjectAging
dc.subjectAnimals
dc.subjectChickens
dc.subjectDeath
dc.subjectGrowth Hormone
dc.subjectInsulin-Like Growth Factor I
dc.subjectMale
dc.subjectMetabolic Diseases
dc.subjectPoultry Diseases
dc.subjectSpecies Specificity
dc.subjectThyroid Gland
dc.subjectThyroxine
dc.subjectTriiodothyronine
dc.titleMetabolic disturbances in male broilers of different strains. 2. Relationship between the thyroid and somatotropic axes with growth rate and mortality
dc.typeOtro


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