國立虎尾科技大學 |

Interactive effects of pre- and post-natal stressors on Chinook salmon performance and fitness.

紀錄類型:	書目-語言資料,手稿 : Monograph/item
正題名/作者:	Interactive effects of pre- and post-natal stressors on Chinook salmon performance and fitness./
作者:	Capelle, Pauline M.
面頁冊數:	1 online resource (167 pages)
附註:	Source: Masters Abstracts International, Volume: 56-03.
標題:	Biology. -
電子資源:	click for full text (PQDT)
ISBN:	9781369547863

Interactive effects of pre- and post-natal stressors on Chinook salmon performance and fitness.
Capelle, Pauline M.

Interactive effects of pre- and post-natal stressors on Chinook salmon performance and fitness. - 1 online resource (167 pages)

Source: Masters Abstracts International, Volume: 56-03.

Thesis (M.Sc.)--University of Windsor (Canada), 2017.

Includes bibliographical references

Assessing the intergenerational effects of stress is an important factor in determining how populations will respond to changing environments. Stressful maternal environments often lead to perceived negative effects on offspring phenotype (e.g., small size, slow growth, high fearfulness/anxiety), yet these changes may better equip offspring for stressful conditions (i.e., environmental matching), showing that intergenerational effects have the potential to dampen negative effects of environmental stressors. This thesis aims to test this theory by manipulating a maternal signal of stress and measuring offspring phenotype and performance in multiple environments. I treated Chinook salmon (Oncorhynchus tshawytscha) eggs with cortisol (low dose (LD), high dose (HD), control dose (CD)) and found that LD and HD groups had higher embryonic survival than the CD group and HD fish were smaller than CD fish at yolk-sac absorption. Following a 30-day post-natal stressor (low water depths in stream channels), juvenile fish from the LD group in low water conditions displayed optimal phenotypic/performance traits, based on measures of size, physiology, and behaviour. However, traits measured in the HD group were sub-optimal, indicating that fish were likely prepared for a more severely stressful environment. The CD group only displayed some indicators of being mismatched to the low water conditions, which may have been more apparent should conditions have been chronically stressful. Collectively, my results emphasize the potential for positive early-life effects of maternally-derived stress and support environmental matching theory while showing detrimental effects of unreliable cues. As environments change rapidly and also become more unpredictable, it is timely to further determine the outcomes of intergenerational stress in both matched and mismatched future environments.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018

Mode of access: World Wide Web

ISBN: 9781369547863Subjects--Topical Terms:

599573
Biology.
Index Terms--Genre/Form:

554714
Electronic books.

Interactive effects of pre- and post-natal stressors on Chinook salmon performance and fitness.
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500 $a Source: Masters Abstracts International, Volume: 56-03.
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502 $a Thesis (M.Sc.)--University of Windsor (Canada), 2017.
504 $a Includes bibliographical references
520 $a Assessing the intergenerational effects of stress is an important factor in determining how populations will respond to changing environments. Stressful maternal environments often lead to perceived negative effects on offspring phenotype (e.g., small size, slow growth, high fearfulness/anxiety), yet these changes may better equip offspring for stressful conditions (i.e., environmental matching), showing that intergenerational effects have the potential to dampen negative effects of environmental stressors. This thesis aims to test this theory by manipulating a maternal signal of stress and measuring offspring phenotype and performance in multiple environments. I treated Chinook salmon (Oncorhynchus tshawytscha) eggs with cortisol (low dose (LD), high dose (HD), control dose (CD)) and found that LD and HD groups had higher embryonic survival than the CD group and HD fish were smaller than CD fish at yolk-sac absorption. Following a 30-day post-natal stressor (low water depths in stream channels), juvenile fish from the LD group in low water conditions displayed optimal phenotypic/performance traits, based on measures of size, physiology, and behaviour. However, traits measured in the HD group were sub-optimal, indicating that fish were likely prepared for a more severely stressful environment. The CD group only displayed some indicators of being mismatched to the low water conditions, which may have been more apparent should conditions have been chronically stressful. Collectively, my results emphasize the potential for positive early-life effects of maternally-derived stress and support environmental matching theory while showing detrimental effects of unreliable cues. As environments change rapidly and also become more unpredictable, it is timely to further determine the outcomes of intergenerational stress in both matched and mismatched future environments.
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