東華大學圖書館 |

語系: 繁體中文

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 effects of ocean acidification o...

Fernandez, Elena R.

FindBook

Google Book

Amazon

博客來

The effects of ocean acidification on walleye pollock ( Theragra chalcogramma) early life history stages.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	The effects of ocean acidification on walleye pollock ( Theragra chalcogramma) early life history stages./
作者:	Fernandez, Elena R.
面頁冊數:	95 p.
附註:	Source: Masters Abstracts International, Volume: 53-02.
Contained By:	Masters Abstracts International53-02(E).
標題:	Agriculture, Fisheries and Aquaculture. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1558362
ISBN:	9781303977916

The effects of ocean acidification on walleye pollock ( Theragra chalcogramma) early life history stages.
Fernandez, Elena R.

The effects of ocean acidification on walleye pollock ( Theragra chalcogramma) early life history stages. - 95 p.

Source: Masters Abstracts International, Volume: 53-02.

Thesis (M.S.)--University of Alaska Fairbanks, 2014.

This item must not be sold to any third party vendors.

Since the Industrial Revolution of the late 1700's, atmospheric and marine carbon dioxide levels have drastically increased. Ocean acidification is the result of the shift in the marine carbon cycle caused by the increase in marine and atmospheric carbon dioxide. Changing environmental conditions caused by ocean acidification have been shown to have adverse effects on different marine species as well as life history stages. As a result, ecologically and economically important teleost fish species such as walleye pollock (Theragra chalcogramma ) could be adversely affected by ocean acidification conditions. This study explores the responses of walleye pollock eggs and larvae incubated under different projected levels of ocean acidification, looking at hatch timing and growth parameters to examine potential adverse responses to more acidic conditions. Older walleye pollock juveniles (age 1+) were used to uncover potential physiological responses to ocean acidification pertaining specifically to stress, overall body condition indices, and blood chemistry. I found that while the two early life history stages of walleye pollock could survive under ambient, high, medium, and low pH conditions (pH 8.1, 7.9, 7.6, and 7.2, respectively), there were some physiological responses to projected levels of ocean acidification. Hatch timing was not delayed in the lowest pH treatment as expected. In addition, size at hatch, yolk area, and eye diameter did not differ among pH treatments. Walleye pollock juveniles reared under projected levels of ocean acidification demonstrated shifts in blood gas levels and blood pH. However, exposure to a lower pH environment of pH 7.9, 7.6, or 7.2 did not induce a response for either the stress indicators or body condition indices that were measured. To uncover the mechanism for their resilience, more testing is needed to gain further insight into underlying compensatory mechanisms of various life history stages and populations.

ISBN: 9781303977916Subjects--Topical Terms:

1020913
Agriculture, Fisheries and Aquaculture.

The effects of ocean acidification on walleye pollock ( Theragra chalcogramma) early life history stages.
LDR:02944nmm a2200289 4500 001 2056041
005 20150429102517.5
008 170521s2014 ||||||||||||||||| ||eng d
020 $a 9781303977916
035 $a (MiAaPQ)AAI1558362
035 $a AAI1558362
040 $a MiAaPQ $c MiAaPQ
100 1 $a Fernandez, Elena R. $3 3169763
245 1 4 $a The effects of ocean acidification on walleye pollock ( Theragra chalcogramma) early life history stages.
300 $a 95 p.
500 $a Source: Masters Abstracts International, Volume: 53-02.
500 $a Advisers: Katrin Iken; Lara Horstmann.
502 $a Thesis (M.S.)--University of Alaska Fairbanks, 2014.
506 $a This item must not be sold to any third party vendors.
520 $a Since the Industrial Revolution of the late 1700's, atmospheric and marine carbon dioxide levels have drastically increased. Ocean acidification is the result of the shift in the marine carbon cycle caused by the increase in marine and atmospheric carbon dioxide. Changing environmental conditions caused by ocean acidification have been shown to have adverse effects on different marine species as well as life history stages. As a result, ecologically and economically important teleost fish species such as walleye pollock (Theragra chalcogramma ) could be adversely affected by ocean acidification conditions. This study explores the responses of walleye pollock eggs and larvae incubated under different projected levels of ocean acidification, looking at hatch timing and growth parameters to examine potential adverse responses to more acidic conditions. Older walleye pollock juveniles (age 1+) were used to uncover potential physiological responses to ocean acidification pertaining specifically to stress, overall body condition indices, and blood chemistry. I found that while the two early life history stages of walleye pollock could survive under ambient, high, medium, and low pH conditions (pH 8.1, 7.9, 7.6, and 7.2, respectively), there were some physiological responses to projected levels of ocean acidification. Hatch timing was not delayed in the lowest pH treatment as expected. In addition, size at hatch, yolk area, and eye diameter did not differ among pH treatments. Walleye pollock juveniles reared under projected levels of ocean acidification demonstrated shifts in blood gas levels and blood pH. However, exposure to a lower pH environment of pH 7.9, 7.6, or 7.2 did not induce a response for either the stress indicators or body condition indices that were measured. To uncover the mechanism for their resilience, more testing is needed to gain further insight into underlying compensatory mechanisms of various life history stages and populations.
590 $a School code: 0006.
650 4 $a Agriculture, Fisheries and Aquaculture. $3 1020913
650 4 $a Environmental Health. $3 578282
690 $a 0792
690 $a 0470
710 2 $a University of Alaska Fairbanks. $b Marine Sciences and Limnology. $3 3169764
773 0 $t Masters Abstracts International $g 53-02(E).
790 $a 0006
791 $a M.S.
792 $a 2014
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1558362