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Effects of Calendar Time, Temperature and Growing Degree-Day on Pacific Herring (Clupea pallasii) Length-at-Age.

紀錄類型:	書目-語言資料,手稿 : Monograph/item
正題名/作者:	Effects of Calendar Time, Temperature and Growing Degree-Day on Pacific Herring (Clupea pallasii) Length-at-Age./
作者:	Grebeldinger, Erika M.
面頁冊數:	1 online resource (70 pages)
附註:	Source: Masters Abstracts International, Volume: 55-04.
Contained By:	Masters Abstracts International55-04(E).
標題:	Aquatic sciences. -
電子資源:	click for full text (PQDT)
ISBN:	9781339548357

Effects of Calendar Time, Temperature and Growing Degree-Day on Pacific Herring (Clupea pallasii) Length-at-Age.
Grebeldinger, Erika M.

Effects of Calendar Time, Temperature and Growing Degree-Day on Pacific Herring (Clupea pallasii) Length-at-Age. - 1 online resource (70 pages)

Source: Masters Abstracts International, Volume: 55-04.

Thesis (M.S.)

Includes bibliographical references

Forage fish species are essential to global marine ecosystems as conduits of energy transfer from low to high trophic levels. Pacific herring (Clupea pallasii) are an important forage fish species in northeast Pacific marine and estuarine ecosystems. Pacific herring length-at-age (LaA, mm) has declined markedly over the past several decades in California and British Columbia (BC) regions thereby influencing physiological processes and biological interactions. Assessing variability in herring LaA is relevant to population and ecosystem studies in addition to sustainable fisheries management and informing fisheries policy. In this study, herring LaA for north coast BC, south coast BC and California (San Francisco Bay) populations were used to estimate how much of the variation is explained by time (year, calendar time), sea surface temperature (°C), and growing degree-day (a metric combining sea surface temperature and calendar time, GDD, °C&dot;day). Time (year) explains more of the interannual variability in herring LaA compared to sea surface temperature and the GDD metric. In addition, a complete removal of older age classes was evident for all areas, suggesting that factors other than those assessed in this study have influenced herring LaA.

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

Mode of access: World Wide Web

ISBN: 9781339548357Subjects--Topical Terms:

1178821
Aquatic sciences.
Index Terms--Genre/Form:

554714
Electronic books.

Effects of Calendar Time, Temperature and Growing Degree-Day on Pacific Herring (Clupea pallasii) Length-at-Age.
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100 1 $a Grebeldinger, Erika M. $3 1178824
245 1 0 $a Effects of Calendar Time, Temperature and Growing Degree-Day on Pacific Herring (Clupea pallasii) Length-at-Age.
264 0 $c 2016
300 $a 1 online resource (70 pages)
336 $a text $b txt $2 rdacontent
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500 $a Source: Masters Abstracts International, Volume: 55-04.
500 $a Adviser: Herman Sievering.
502 $a Thesis (M.S.) $c Royal Roads University (Canada) $d 2016.
504 $a Includes bibliographical references
520 $a Forage fish species are essential to global marine ecosystems as conduits of energy transfer from low to high trophic levels. Pacific herring (Clupea pallasii) are an important forage fish species in northeast Pacific marine and estuarine ecosystems. Pacific herring length-at-age (LaA, mm) has declined markedly over the past several decades in California and British Columbia (BC) regions thereby influencing physiological processes and biological interactions. Assessing variability in herring LaA is relevant to population and ecosystem studies in addition to sustainable fisheries management and informing fisheries policy. In this study, herring LaA for north coast BC, south coast BC and California (San Francisco Bay) populations were used to estimate how much of the variation is explained by time (year, calendar time), sea surface temperature (°C), and growing degree-day (a metric combining sea surface temperature and calendar time, GDD, °C&dot;day). Time (year) explains more of the interannual variability in herring LaA compared to sea surface temperature and the GDD metric. In addition, a complete removal of older age classes was evident for all areas, suggesting that factors other than those assessed in this study have influenced herring LaA.
520 $a The results of this research suggest that future studies should focus on modeling multiple factors that may influence variability in herring LaA such as ocean regime shifts influencing prey quality and quantity, environmental pressures (e.g., seawater temperature), and impacts from size-selective fishing that may affect population recovery of this species.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
650 4 $a Aquatic sciences. $3 1178821
650 4 $a Management. $3 558618
650 4 $a Ecology. $3 575279
655 7 $a Electronic books. $2 local $3 554714
690 $a 0792
690 $a 0454
690 $a 0329
710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a Royal Roads University (Canada). $b Environment and Sustainability. $3 1178825
773 0 $t Masters Abstracts International $g 55-04(E).
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10037651 $z click for full text (PQDT)