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| LEADER |
00000ctm a2200000Ka 4500 |
| 001 |
in00001771021 |
| 005 |
20220103134753.0 |
| 007 |
cr unu a |
| 008 |
030709s2002 xx a b 000 0 eng d |
| 035 |
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|a (OCoLC)ocm52582978
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| 040 |
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|a TXA
|c TXA
|d UtOrBLW
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| 049 |
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|a TXAM
|a TXAR
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| 099 |
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|a 2002
|a Thesis
|a F97
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| 100 |
1 |
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|a Fuson, Amanda Lynn.
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| 245 |
1 |
0 |
|a Aerobic capacities in the heart, kidneys, and splanchnic organs of harbor seals :
|b adaptations to diving hypoxia /
|c by Amanda Lynn Fuson.
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| 264 |
|
1 |
|a [Place of publication not identified] :
|b [publisher not identified] ;
|c 2002.
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| 300 |
|
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|a x, 57 leaves :
|b illustrations ;
|c 28 cm.
|
| 336 |
|
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|a text
|b txt
|2 rdacontent
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| 337 |
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|a computer
|b c
|2 rdamedia
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| 338 |
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|a online resource
|b cr
|2 rdacarrier
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| 500 |
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|a "Major subject: Wildlife and Fisheries Sciences".
|
| 500 |
|
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|a Vita.
|
| 502 |
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|b M.S.
|c Texas A&M University
|d 2002
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| 504 |
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|a Includes bibliographical references (leaves 50-56).
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| 520 |
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|a Pinnipeds (seals and sea lions) have an elevated mitochondrial volume density [Vv(mt)] and citrate synthase (CS) and β-hydroxyacyl-CoA dehydrogenase (HOAD) activity in their swimming muscles, to maintain aerobic metabolism, as an adaptation for diving hypoxia. However, little is known about the aerobic capacity of other organs, such as the heart, kidneys, and splanchnic organs. The goal of this study was to determine if any of these organs have an elevated Vv(mt) and CS and HOAD activity as an adaptation for sustaining aerobic metabolism and normal function during hypoxia. Samples of heart, liver, kidney, stomach, and small intestine were taken from ten freshly dead harbor seals (Phoca vitulina) and fixed in glutaraldehyde for transmission electron microscopy or frozen in liquid nitrogen for enzymatic analysis. Samples from dogs and rats were used for comparative purposes. Mitochondrial volume density per volume of tissue scaled to mass specific metabolic rate in the heart, liver, kidneys, stomach and small intestine of harbor seals was elevated when compared to that of terrestrial control animals such as dog and rat. The Vv(mt)/RMR (RMR = mass specific resting metabolic rate) of the harbor seal heart was 1.4 and 2.3X greater than the dog and rat, respectively. Vv(mt)/RMR of the harbor seal liver was 2.5 and 5X greater than the dog and rat, respectively. Vv(mt)/RMR of the harbor seal kidney was 2 and 4X greater than the dog and rat, respectively. The Vv(mt)/RMR of the harbor seal stomach was 1.8 and 4.5X greater than the dog and rat, respectively. The Vv(mt)/RMR of the harbor seal intestine was 3 and 3.3X greater than the dog and rat, respectively. CS and HOAD activity scaled to mass specific metabolic rate in the heart and liver of harbor seals was elevated over the dog and rat as well (2.3 and 1.4X in the heart, and 2.5 and 5X in the liver). These data suggest that organs such as the liver, kidneys, and stomach also possess a heightened ability for aerobic, fat-based metabolism during the hypoxia associated with routine diving.
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| 530 |
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|a Also available online.
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| 530 |
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|a Issued also on microfiche from Lange Micrographics.
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| 650 |
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4 |
|a Major wildlife and fisheries sciences.
|
| 856 |
4 |
1 |
|u https://hdl.handle.net/1969.1/ETD-TAMU-2002-THESIS-F97
|z Link to OAKTrust copy
|t 0
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| 948 |
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|a cataloged
|b h
|c 2003/7/9
|d c
|e eneff
|f 2:57:46 pm
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| 994 |
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|a E0
|b TXA
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| 999 |
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|a MARS
|
| 999 |
f |
f |
|s 2e8197de-7788-3123-b2ad-42f9bf72f563
|i 8df0075d-1e4b-38c2-b138-3e1fe778843e
|t 0
|
| 952 |
f |
f |
|p noncirc
|a Texas A&M University
|b College Station
|c Cushing Memorial Library & Archives
|s cush tdrm
|d Cushing: Theses & Dissertations Microforms (Does not check out)
|t 0
|e 2002 Thesis F97
|h Other scheme
|i computer -- online resource
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| 952 |
f |
f |
|a Texas A&M University
|b College Station
|c Electronic Resources
|s www_evans
|d Available Online
|t 0
|e 2002 Thesis F97
|h Other scheme
|
| 998 |
f |
f |
|a 2002 Thesis F97
|t 0
|l Available Online
|
| 998 |
f |
f |
|a 2002 Thesis F97
|t 0
|l Cushing: Theses & Dissertations Microforms (Does not check out)
|