語系:
繁體中文
English
說明(常見問題)
回圖書館首頁
手機版館藏查詢
登入
回首頁
切換:
標籤
|
MARC模式
|
ISBD
The Impacts of Acute Hypoxic Exposur...
~
Schwieterman, Gail Danielle.
FindBook
Google Book
Amazon
博客來
The Impacts of Acute Hypoxic Exposure and Other Concomitant Stressors on the Cardiorespiratory Physiology of Coastal Elasmobranch Fishes.
紀錄類型:
書目-電子資源 : Monograph/item
正題名/作者:
The Impacts of Acute Hypoxic Exposure and Other Concomitant Stressors on the Cardiorespiratory Physiology of Coastal Elasmobranch Fishes./
作者:
Schwieterman, Gail Danielle.
出版者:
Ann Arbor : ProQuest Dissertations & Theses, : 2020,
面頁冊數:
247 p.
附註:
Source: Dissertations Abstracts International, Volume: 81-11, Section: B.
Contained By:
Dissertations Abstracts International81-11B.
標題:
Physiology. -
電子資源:
https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=27960229
ISBN:
9798644900138
The Impacts of Acute Hypoxic Exposure and Other Concomitant Stressors on the Cardiorespiratory Physiology of Coastal Elasmobranch Fishes.
Schwieterman, Gail Danielle.
The Impacts of Acute Hypoxic Exposure and Other Concomitant Stressors on the Cardiorespiratory Physiology of Coastal Elasmobranch Fishes.
- Ann Arbor : ProQuest Dissertations & Theses, 2020 - 247 p.
Source: Dissertations Abstracts International, Volume: 81-11, Section: B.
Thesis (Ph.D.)--The College of William and Mary, 2020.
This item must not be sold to any third party vendors.
This dissertation examines physiological stress responses of coastal elasmobranch fishes and investigates mechanisms that maintain oxygen delivery under stress. Elasmobranch fishes are, in general, understudied despite their susceptibility (due to K-selected life histories) to unsustainably high fishing mortality and the effects of climate change. Knowledge of physiological stress responses is, therefore, necessary to understand species-specific resilience and overall susceptibility to stressors. In Chapter II, I describe the hypoxia tolerances of clearnose skate (Rostaraja eglanteria), thorny skate (Amblyraja radiata), and summer flounder (Paralichthys dentatus, a representative teleost species) under conditions of temperatures and acidification projected to occur by the end of the century due to climate change. At the least-stressful temperature, all three species exhibited significant increases in standard metabolic rate and decreases in hypoxia tolerance with a 0.4 unit drop in pH. Clearnose skate were, however, found to be among the most hypoxia-tolerant elasmobranch species known. To investigate the physiological adaptations underpinning this extreme hypoxia tolerance, I measured blood-oxygen affinity (measured as P50 - the oxygen partial pressure (pO2) at which hemoglobin is 50% saturated with O2) of clearnose skate (Chapter III). Clearnose skate exhibited a relatively high P50 (4.9 ± 0.6 kPa) at 20 °C that was not different from that of the equally hypoxia-tolerant epaulette shark (4.3 ± 0.6 kPa at 28 °C). Yet, these values are significantly higher than those of many other elasmobranch species, suggesting blood-oxygen affinity may not be correlated with hypoxia tolerance in elasmobranch fishes as it is in teleost fishes. At the cellular level, the erythrocyte intracellular pH influences hemoglobin-oxygen (Hb-O2) affinity. In teleost fishes, decreases in Hb-O2 affinity (Bohr effect) and maximum blood oxygen carrying capacity (Root effect) result from acidosis. These responses can be mitigated through red blood cell (RBC) swelling. The aim of Chapter IV was, therefore, to investigate the prevalence of RBC swelling in elasmobranchs fishes. Blood samples were taken from captive individuals of five elasmobranch species: Clearnose skate, sandbar shark (Carcharhinus plumbeus), blacktip reef shark (C. melanopterus), sicklefin lemon shark (Negaprion acutidens), and epaulette shark (Hemisyllium ocellatum) following exhaustive exercise and acute air exposure. None of the measured hematological parameters (hematocrit, blood hemoglobin concentration [Hb], RBC counts, RBC volume, and mean corpuscular hemoglobin content; MCHC) were indicative of RBC swelling, although published results show swelling occurs in sandbar and epaulette shark RBCs. Other impairments to the cardiorespiratory may result from external stressors, such as those associated with interactions with fishing gear. I hypothesized the cause of post-release mortality in elasmobranch fishes is diminished myocardial function. To test this hypothesis, I measured changes in the functional properties of isolated ventricular myocardial muscle from clearnose skate, smooth dogfish (Mustelus canis), and sandbar shark during hyperkalemia (7.4 mM K+), acidosis (a pH decline of 0.8 units), and reduced oxygen (to 31% saturation) at two temperatures (Chapter V). Stressors had relatively small and species-specific detrimental impacts on myocardial function that were only partially ameliorated adrenergic stimulation (i.e. by application of isoproterenol, an adrenaline analog). Overall, this dissertation implies that coastal elasmobranch fishes maybe highly resilient to the effects of directional climate change and the physiological stress associated with interactions with fishing gear.
ISBN: 9798644900138Subjects--Topical Terms:
518431
Physiology.
Subjects--Index Terms:
Blood-oxygen affinity
The Impacts of Acute Hypoxic Exposure and Other Concomitant Stressors on the Cardiorespiratory Physiology of Coastal Elasmobranch Fishes.
LDR
:05049nmm a2200385 4500
001
2280228
005
20210830065518.5
008
220723s2020 ||||||||||||||||| ||eng d
020
$a
9798644900138
035
$a
(MiAaPQ)AAI27960229
035
$a
AAI27960229
040
$a
MiAaPQ
$c
MiAaPQ
100
1
$a
Schwieterman, Gail Danielle.
$0
(orcid)0000-0001-6356-0337
$3
3558737
245
1 4
$a
The Impacts of Acute Hypoxic Exposure and Other Concomitant Stressors on the Cardiorespiratory Physiology of Coastal Elasmobranch Fishes.
260
1
$a
Ann Arbor :
$b
ProQuest Dissertations & Theses,
$c
2020
300
$a
247 p.
500
$a
Source: Dissertations Abstracts International, Volume: 81-11, Section: B.
500
$a
Advisor: Brill, Richard W.
502
$a
Thesis (Ph.D.)--The College of William and Mary, 2020.
506
$a
This item must not be sold to any third party vendors.
520
$a
This dissertation examines physiological stress responses of coastal elasmobranch fishes and investigates mechanisms that maintain oxygen delivery under stress. Elasmobranch fishes are, in general, understudied despite their susceptibility (due to K-selected life histories) to unsustainably high fishing mortality and the effects of climate change. Knowledge of physiological stress responses is, therefore, necessary to understand species-specific resilience and overall susceptibility to stressors. In Chapter II, I describe the hypoxia tolerances of clearnose skate (Rostaraja eglanteria), thorny skate (Amblyraja radiata), and summer flounder (Paralichthys dentatus, a representative teleost species) under conditions of temperatures and acidification projected to occur by the end of the century due to climate change. At the least-stressful temperature, all three species exhibited significant increases in standard metabolic rate and decreases in hypoxia tolerance with a 0.4 unit drop in pH. Clearnose skate were, however, found to be among the most hypoxia-tolerant elasmobranch species known. To investigate the physiological adaptations underpinning this extreme hypoxia tolerance, I measured blood-oxygen affinity (measured as P50 - the oxygen partial pressure (pO2) at which hemoglobin is 50% saturated with O2) of clearnose skate (Chapter III). Clearnose skate exhibited a relatively high P50 (4.9 ± 0.6 kPa) at 20 °C that was not different from that of the equally hypoxia-tolerant epaulette shark (4.3 ± 0.6 kPa at 28 °C). Yet, these values are significantly higher than those of many other elasmobranch species, suggesting blood-oxygen affinity may not be correlated with hypoxia tolerance in elasmobranch fishes as it is in teleost fishes. At the cellular level, the erythrocyte intracellular pH influences hemoglobin-oxygen (Hb-O2) affinity. In teleost fishes, decreases in Hb-O2 affinity (Bohr effect) and maximum blood oxygen carrying capacity (Root effect) result from acidosis. These responses can be mitigated through red blood cell (RBC) swelling. The aim of Chapter IV was, therefore, to investigate the prevalence of RBC swelling in elasmobranchs fishes. Blood samples were taken from captive individuals of five elasmobranch species: Clearnose skate, sandbar shark (Carcharhinus plumbeus), blacktip reef shark (C. melanopterus), sicklefin lemon shark (Negaprion acutidens), and epaulette shark (Hemisyllium ocellatum) following exhaustive exercise and acute air exposure. None of the measured hematological parameters (hematocrit, blood hemoglobin concentration [Hb], RBC counts, RBC volume, and mean corpuscular hemoglobin content; MCHC) were indicative of RBC swelling, although published results show swelling occurs in sandbar and epaulette shark RBCs. Other impairments to the cardiorespiratory may result from external stressors, such as those associated with interactions with fishing gear. I hypothesized the cause of post-release mortality in elasmobranch fishes is diminished myocardial function. To test this hypothesis, I measured changes in the functional properties of isolated ventricular myocardial muscle from clearnose skate, smooth dogfish (Mustelus canis), and sandbar shark during hyperkalemia (7.4 mM K+), acidosis (a pH decline of 0.8 units), and reduced oxygen (to 31% saturation) at two temperatures (Chapter V). Stressors had relatively small and species-specific detrimental impacts on myocardial function that were only partially ameliorated adrenergic stimulation (i.e. by application of isoproterenol, an adrenaline analog). Overall, this dissertation implies that coastal elasmobranch fishes maybe highly resilient to the effects of directional climate change and the physiological stress associated with interactions with fishing gear.
590
$a
School code: 0261.
650
4
$a
Physiology.
$3
518431
650
4
$a
Animal sciences.
$3
3174829
650
4
$a
Biological oceanography.
$3
2122748
653
$a
Blood-oxygen affinity
653
$a
Cardiac function
653
$a
Elasmobranch
653
$a
Erythrocyte
653
$a
Hypoxia
653
$a
Metabolism
690
$a
0719
690
$a
0475
690
$a
0416
710
2
$a
The College of William and Mary.
$b
School of Marine Science.
$3
3281332
773
0
$t
Dissertations Abstracts International
$g
81-11B.
790
$a
0261
791
$a
Ph.D.
792
$a
2020
793
$a
English
856
4 0
$u
https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=27960229
筆 0 讀者評論
館藏地:
全部
電子資源
出版年:
卷號:
館藏
1 筆 • 頁數 1 •
1
條碼號
典藏地名稱
館藏流通類別
資料類型
索書號
使用類型
借閱狀態
預約狀態
備註欄
附件
W9431961
電子資源
11.線上閱覽_V
電子書
EB
一般使用(Normal)
在架
0
1 筆 • 頁數 1 •
1
多媒體
評論
新增評論
分享你的心得
Export
取書館
處理中
...
變更密碼
登入