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Using Stable Isotopes to Determine F...

Hsu, Sharon .

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Using Stable Isotopes to Determine Foraging Areas of Leatherback Sea Turtles: Limitations of the Isotope Tracking Technique in the Western Atlantic Ocean.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Using Stable Isotopes to Determine Foraging Areas of Leatherback Sea Turtles: Limitations of the Isotope Tracking Technique in the Western Atlantic Ocean./
作者:	Hsu, Sharon .
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2020,
面頁冊數:	50 p.
附註:	Source: Masters Abstracts International, Volume: 82-01.
Contained By:	Masters Abstracts International82-01.
標題:	Biology. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=27958272
ISBN:	9798662400276

Using Stable Isotopes to Determine Foraging Areas of Leatherback Sea Turtles: Limitations of the Isotope Tracking Technique in the Western Atlantic Ocean.
Hsu, Sharon .

Using Stable Isotopes to Determine Foraging Areas of Leatherback Sea Turtles: Limitations of the Isotope Tracking Technique in the Western Atlantic Ocean. - Ann Arbor : ProQuest Dissertations & Theses, 2020 - 50 p.

Source: Masters Abstracts International, Volume: 82-01.

Thesis (M.S.)--San Jose State University, 2020.

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

Reproductive output has long been linked to habitat quality and resource availability. Individuals foraging in high-quality habitats with high resource availability will have better body conditions and higher survival rates, as well as greater reproductive output. Post-nesting, Western Caribbean leatherback turtles are known to migrate to at least two foraging regions: the western North Atlantic and Gulf of Mexico. This study had three objectives: [1] measure δ13C and δ15N values in bulk skin tissue of females nesting in Parismina, Costa Rica to reveal prior foraging region; [2] assess influence of foraging region on female body size and reproductive output; and [3] conduct a comprehensive review of existing stable isotope data for various taxa (from baseline producers to higher order consumers) and create δ13C and δ15N isoscapes to use as a reference for the Gulf of Mexico and western North Atlantic. It was not possible to infer foraging region for skin samples collected in Parismina based on stable isotope values, nor was there a relationship between stable carbon values and reproductive output. Synthesized isoscapes from published stable isotope data showed substantial variation between taxa and sampling regions. Stable carbon values were higher in the Gulf of Mexico than the western North Atlantic for leatherbacks, but no other consistent trends were distinguishable. Although I was unable to validate it as a primary technique to study leatherback movements between nesting and foraging grounds, stable isotope analysis still holds important conservation value for leatherbacks in conjunction with satellite tracking. This study highlights the need for more stable isotope data and longer-term data collection.

ISBN: 9798662400276Subjects--Topical Terms:

522710
Biology.
Subjects--Index Terms:

Foraging

Using Stable Isotopes to Determine Foraging Areas of Leatherback Sea Turtles: Limitations of the Isotope Tracking Technique in the Western Atlantic Ocean.
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520 $a Reproductive output has long been linked to habitat quality and resource availability. Individuals foraging in high-quality habitats with high resource availability will have better body conditions and higher survival rates, as well as greater reproductive output. Post-nesting, Western Caribbean leatherback turtles are known to migrate to at least two foraging regions: the western North Atlantic and Gulf of Mexico. This study had three objectives: [1] measure δ13C and δ15N values in bulk skin tissue of females nesting in Parismina, Costa Rica to reveal prior foraging region; [2] assess influence of foraging region on female body size and reproductive output; and [3] conduct a comprehensive review of existing stable isotope data for various taxa (from baseline producers to higher order consumers) and create δ13C and δ15N isoscapes to use as a reference for the Gulf of Mexico and western North Atlantic. It was not possible to infer foraging region for skin samples collected in Parismina based on stable isotope values, nor was there a relationship between stable carbon values and reproductive output. Synthesized isoscapes from published stable isotope data showed substantial variation between taxa and sampling regions. Stable carbon values were higher in the Gulf of Mexico than the western North Atlantic for leatherbacks, but no other consistent trends were distinguishable. Although I was unable to validate it as a primary technique to study leatherback movements between nesting and foraging grounds, stable isotope analysis still holds important conservation value for leatherbacks in conjunction with satellite tracking. This study highlights the need for more stable isotope data and longer-term data collection.
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