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

Ecological and Oceanographic Influen...

Aleksa, Katrina T.

FindBook

Google Book

Amazon

博客來

Ecological and Oceanographic Influences on Leatherback Turtle Behavior and Scyphozoan Jellyfish Distributions in the Gulf of Mexico.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Ecological and Oceanographic Influences on Leatherback Turtle Behavior and Scyphozoan Jellyfish Distributions in the Gulf of Mexico./
作者:	Aleksa, Katrina T.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2017,
面頁冊數:	127 p.
附註:	Source: Dissertation Abstracts International, Volume: 79-03(E), Section: B.
Contained By:	Dissertation Abstracts International79-03B(E).
標題:	Biological oceanography. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10641595
ISBN:	9780355512601

Ecological and Oceanographic Influences on Leatherback Turtle Behavior and Scyphozoan Jellyfish Distributions in the Gulf of Mexico.
Aleksa, Katrina T.

Ecological and Oceanographic Influences on Leatherback Turtle Behavior and Scyphozoan Jellyfish Distributions in the Gulf of Mexico. - Ann Arbor : ProQuest Dissertations & Theses, 2017 - 127 p.

Source: Dissertation Abstracts International, Volume: 79-03(E), Section: B.

Thesis (Ph.D.)--The University of Southern Mississippi, 2017.

Leatherback turtles (Dermochelys coriacea) are a wide-ranging, oceanic species that feed exclusively on gelatinous zooplankton. Leatherback have been spotted in the Gulf of Mexico (GoM) for several decades and consistently had a high level of interactions with longline fisheries. However, no quantitative studies have been performed to address the spatiotemporal distribution of these turtles in the GoM. This research determines 1) leatherback movements and high-use areas in the GoM, 2) their association with oceanographic features, 3) the distribution and density of two abundant medusae in the northern GoM and any association with biophysical parameters, and 4) the body composition and energy density of a select leatherback prey, Drymonema larsoni .

ISBN: 9780355512601Subjects--Topical Terms:

2122748
Biological oceanography.

Ecological and Oceanographic Influences on Leatherback Turtle Behavior and Scyphozoan Jellyfish Distributions in the Gulf of Mexico.
LDR:04665nmm a2200337 4500 001 2200469
005 20190315110956.5
008 201008s2017 ||||||||||||||||| ||eng d
020 $a 9780355512601
035 $a (MiAaPQ)AAI10641595
035 $a (MiAaPQ)southernmiss:10595
035 $a AAI10641595
040 $a MiAaPQ $c MiAaPQ
100 1 $a Aleksa, Katrina T. $3 3427220
245 1 0 $a Ecological and Oceanographic Influences on Leatherback Turtle Behavior and Scyphozoan Jellyfish Distributions in the Gulf of Mexico.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2017
300 $a 127 p.
500 $a Source: Dissertation Abstracts International, Volume: 79-03(E), Section: B.
500 $a Adviser: William M. Graham.
502 $a Thesis (Ph.D.)--The University of Southern Mississippi, 2017.
520 $a Leatherback turtles (Dermochelys coriacea) are a wide-ranging, oceanic species that feed exclusively on gelatinous zooplankton. Leatherback have been spotted in the Gulf of Mexico (GoM) for several decades and consistently had a high level of interactions with longline fisheries. However, no quantitative studies have been performed to address the spatiotemporal distribution of these turtles in the GoM. This research determines 1) leatherback movements and high-use areas in the GoM, 2) their association with oceanographic features, 3) the distribution and density of two abundant medusae in the northern GoM and any association with biophysical parameters, and 4) the body composition and energy density of a select leatherback prey, Drymonema larsoni .
520 $a Satellite telemetry data from 10 nesting and 6 in-water tagged leatherbacks were analyzed using a switching state-space model (SSSM) and a kernel density estimation to identify high-use areas. The SSSM revealed that foraging behavior was dominant in GoM and two high-use areas were present, one in the northeast GoM between Louisiana and the Florida panhandle, and the second in the southwest GoM along the Yucatan shelf waters in the Campeche Bay, Mexico. The leatherback positioning data were compared to physical oceanographic features (sea surface height anomalies, temperature and salinity fronts, ocean currents, divergence and convergence) to investigate their potential influence on turtle movement and space use. The turtle observations were found to be positively associated with sea surface lows and salinity fronts. Turtles also benefitted from their relationship with ocean currents more during migration than foraging behaviors.
520 $a The distribution and density of scyphozoan species (Chrysaora quinquecirrha and Aurelia spp.), potential leatherback prey items, were analyzed with generalized additive models (GAM) to determine the biophysical parameters that are associated with collection of these jellyfish in the northern GoM. These species were found to be associated with salinity, surface currents, temperature, chlorophyll a concentrations, and distance from shore. Visual observations of leatherback foraging in the northern GoM suggested a preferred prey item of Drymonema larsoni. This elusive species has been rarely studied, with only a few reports on its predation of Aurelia spp. A database search was conducted to determine the occurrence of D. larsoni in the northern GoM and how it compared to the biomass of Aurelia spp. D. larsoni specimens were also collected and processed to determine body composition and energy density. A high biomass of Aurelia spp. over consecutive years was linked to the presence of D. larsoni in the northern GoM. Sexually mature D. larsoni had a mean energy density of 0.19 kJ g WM--1 for the whole organism, and gonadal tissue had the highest amount of energy.
520 $a Overall, the research suggests that the GoM is a foraging destination for leatherback turtles with two high-use areas. The location and density of jellyfish prey coincided with the identified leatherback foraging, signifying support for sustained foraging efforts. The selective prey item, D. larsoni, has a similar energy density to selective prey in other known foraging locations, revealing the potential for high energy consumption in the GoM. Lastly, leatherback movements were associated with parameters that were descriptive of jellyfish density, suggesting space use was linked to the search for prey. These findings can be utilized for the conservation and management of leatherbacks in these waters.
590 $a School code: 0211.
650 4 $a Biological oceanography. $3 2122748
650 4 $a Ecology. $3 516476
690 $a 0416
690 $a 0329
710 2 $a The University of Southern Mississippi. $b Marine Science. $3 3187756
773 0 $t Dissertation Abstracts International $g 79-03B(E).
790 $a 0211
791 $a Ph.D.
792 $a 2017
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10641595