Impact of Nutritional Status on the Somatotropic Axis and Ghrelin in Phocid Seals
Metabolic hormones and their axes, including the target tissues and receptors, regulate the tissue specific utilization of nutrients with in the body. The purpose of this research was to understand the hormonal control of complex nutrient partitioning mechanisms involved in young, growing animals. S...
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ftunivnflorida:oai:digitalcommons.unf.edu:etd-1503 2023-05-15T16:05:23+02:00 Impact of Nutritional Status on the Somatotropic Axis and Ghrelin in Phocid Seals Dailey, Rachael 2013-01-01T08:00:00Z application/pdf https://digitalcommons.unf.edu/etd/481 https://digitalcommons.unf.edu/cgi/viewcontent.cgi?article=1503&context=etd unknown UNF Digital Commons https://digitalcommons.unf.edu/etd/481 https://digitalcommons.unf.edu/cgi/viewcontent.cgi?article=1503&context=etd UNF Graduate Theses and Dissertations Thesis University of North Florida UNF Dissertations Academic -- UNF -- Master of Science in Biology Academic -- UNF -- Biology marine mammal pinniped metabolic endocrinology nutrition Biology Comparative Nutrition Zoology thesis 2013 ftunivnflorida 2022-12-09T08:01:08Z Metabolic hormones and their axes, including the target tissues and receptors, regulate the tissue specific utilization of nutrients with in the body. The purpose of this research was to understand the hormonal control of complex nutrient partitioning mechanisms involved in young, growing animals. Specifically, this involved the investigation of metabolic hormones and the regulation of growth in two common species of phocids (true seals): harbor seal (Phoca vitulina) and Northern elephant seal (Mirounga angustirostris) pups. This longitudinal study examines young phocids from nutritional nadir through realimentation (realimentation) to investigate how metabolic hormones involved in both food intake and nutrient partitioning change with respect to nutritional state. To investigate the role of metabolic hormones during realimentation in a small phocid seal, chapter 2 focuses on the changes in the somatotropic axis and ghrelin during a 10-week period of realimentation following nutritional nadir. Chapter 3 focuses on the application of the results of previous research and the second chapter of this thesis to a specific experimental feeding project. Chapter 4 focuses on the response to changes in nutritional status in the fasting adapted NES. Given the changes in metabolism and priority of nutrient utilization associated with transitioning from a nursing neonate to a fasting adapted juvenile, NES provide a unique opportunity to assess the effect of age on the response to realimentation. Overall, this research will further expand the understanding of tissue specific demands and the effect on endocrine response to realimentation. By incorporating assessments of metabolic changes based on nutrition as well as age, this study will expound on how metabolic hormones are involved in regulating the trade-off between adipose and lean tissue development in this unique taxon. Thesis Elephant Seal harbor seal Phoca vitulina University of North Florida (UNF): Digital Commons Nes ENVELOPE(7.634,7.634,62.795,62.795) Nes’ ENVELOPE(44.681,44.681,66.600,66.600) |
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collection |
University of North Florida (UNF): Digital Commons |
op_collection_id |
ftunivnflorida |
language |
unknown |
topic |
Thesis University of North Florida UNF Dissertations Academic -- UNF -- Master of Science in Biology Academic -- UNF -- Biology marine mammal pinniped metabolic endocrinology nutrition Biology Comparative Nutrition Zoology |
spellingShingle |
Thesis University of North Florida UNF Dissertations Academic -- UNF -- Master of Science in Biology Academic -- UNF -- Biology marine mammal pinniped metabolic endocrinology nutrition Biology Comparative Nutrition Zoology Dailey, Rachael Impact of Nutritional Status on the Somatotropic Axis and Ghrelin in Phocid Seals |
topic_facet |
Thesis University of North Florida UNF Dissertations Academic -- UNF -- Master of Science in Biology Academic -- UNF -- Biology marine mammal pinniped metabolic endocrinology nutrition Biology Comparative Nutrition Zoology |
description |
Metabolic hormones and their axes, including the target tissues and receptors, regulate the tissue specific utilization of nutrients with in the body. The purpose of this research was to understand the hormonal control of complex nutrient partitioning mechanisms involved in young, growing animals. Specifically, this involved the investigation of metabolic hormones and the regulation of growth in two common species of phocids (true seals): harbor seal (Phoca vitulina) and Northern elephant seal (Mirounga angustirostris) pups. This longitudinal study examines young phocids from nutritional nadir through realimentation (realimentation) to investigate how metabolic hormones involved in both food intake and nutrient partitioning change with respect to nutritional state. To investigate the role of metabolic hormones during realimentation in a small phocid seal, chapter 2 focuses on the changes in the somatotropic axis and ghrelin during a 10-week period of realimentation following nutritional nadir. Chapter 3 focuses on the application of the results of previous research and the second chapter of this thesis to a specific experimental feeding project. Chapter 4 focuses on the response to changes in nutritional status in the fasting adapted NES. Given the changes in metabolism and priority of nutrient utilization associated with transitioning from a nursing neonate to a fasting adapted juvenile, NES provide a unique opportunity to assess the effect of age on the response to realimentation. Overall, this research will further expand the understanding of tissue specific demands and the effect on endocrine response to realimentation. By incorporating assessments of metabolic changes based on nutrition as well as age, this study will expound on how metabolic hormones are involved in regulating the trade-off between adipose and lean tissue development in this unique taxon. |
format |
Thesis |
author |
Dailey, Rachael |
author_facet |
Dailey, Rachael |
author_sort |
Dailey, Rachael |
title |
Impact of Nutritional Status on the Somatotropic Axis and Ghrelin in Phocid Seals |
title_short |
Impact of Nutritional Status on the Somatotropic Axis and Ghrelin in Phocid Seals |
title_full |
Impact of Nutritional Status on the Somatotropic Axis and Ghrelin in Phocid Seals |
title_fullStr |
Impact of Nutritional Status on the Somatotropic Axis and Ghrelin in Phocid Seals |
title_full_unstemmed |
Impact of Nutritional Status on the Somatotropic Axis and Ghrelin in Phocid Seals |
title_sort |
impact of nutritional status on the somatotropic axis and ghrelin in phocid seals |
publisher |
UNF Digital Commons |
publishDate |
2013 |
url |
https://digitalcommons.unf.edu/etd/481 https://digitalcommons.unf.edu/cgi/viewcontent.cgi?article=1503&context=etd |
long_lat |
ENVELOPE(7.634,7.634,62.795,62.795) ENVELOPE(44.681,44.681,66.600,66.600) |
geographic |
Nes Nes’ |
geographic_facet |
Nes Nes’ |
genre |
Elephant Seal harbor seal Phoca vitulina |
genre_facet |
Elephant Seal harbor seal Phoca vitulina |
op_source |
UNF Graduate Theses and Dissertations |
op_relation |
https://digitalcommons.unf.edu/etd/481 https://digitalcommons.unf.edu/cgi/viewcontent.cgi?article=1503&context=etd |
_version_ |
1766401284905107456 |