کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2801454 | 1156159 | 2010 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Re-alimentation in harbor seal pups: Effects on the somatotropic axis and growth rate
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کلمات کلیدی
Phoca vitulinaCondition index - شاخص وضعیتInsulin-like growth factor-I - عامل رشد انسولین مانند ISomatotropic axis - محور سومیوتروپیکGrowth rate - نرخ رشدGrowth hormone - هورمون رشدinsulin-like growth factor binding proteins - پروتئین های اتصال دهنده عامل رشد انسولین مانندHArbor seal - چشم انداز HArbor
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
علوم غدد
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The metabolic hormones, growth hormone (GH) and insulin-like growth factor (IGF)-I, together with IGF binding proteins (IGFBP), have been well studied in domestic species and are the primary components of the somatotropic axis. This hormone axis is responsive to nutrient intake, associated with growth rate, and accretion of protein and adipose. However, this relationship has not been evaluated in species that rely heavily on adipose stores for survival, such as pinnipeds. The primary objectives of this research were to investigate the response of the somatotropic axis to reduced nutrient intake and re-alimentation in rehabilitated harbor seal pups, and to assess if these hormones are related to nutritional status and growth rate in harbor seals. Stranded harbor seal pups (n = 24) arrived at the rehabilitation facility very thin after fasting for several days (nutritional nadir). Throughout rehabilitation nutrient intake increased and pups gained mass and body condition. Concentrations of GH and IGFBP-2 decreased with re-alimentation, while IGF-I and IGFBP-3 concentrations increased. Overall, GH and IGFBP-2 were negatively associated and IGF-I and IGFBP-3 were positively associated with growth rate and increased body condition of harbor sea pups. Further, the magnitude of the growth response was related to the magnitude in response of the somatotropic axis to varied levels of intake. These data suggest that multiple components of the somatotropic axis may be used to assess the energy status of individuals and may also provide information on the level of feed intake that is predictive of growth rate.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: General and Comparative Endocrinology - Volume 165, Issue 2, 15 January 2010, Pages 286-292
Journal: General and Comparative Endocrinology - Volume 165, Issue 2, 15 January 2010, Pages 286-292
نویسندگان
Julie P. Richmond, Tenaya Norris, Steven A. Zinn,