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By the Light of the Moon : = North Pacific Dolphins Optimize Foraging with the Lunar Cycle.

紀錄類型:	書目-語言資料,手稿 : Monograph/item
正題名/作者:	By the Light of the Moon :/
其他題名:	North Pacific Dolphins Optimize Foraging with the Lunar Cycle.
作者:	Simonis, Anne Elizabeth.
面頁冊數:	1 online resource (132 pages)
附註:	Source: Dissertation Abstracts International, Volume: 79-01(E), Section: B.
標題:	Biological oceanography. -
電子資源:	click for full text (PQDT)
ISBN:	9780355314335

By the Light of the Moon : = North Pacific Dolphins Optimize Foraging with the Lunar Cycle.
Simonis, Anne Elizabeth.

By the Light of the Moon :North Pacific Dolphins Optimize Foraging with the Lunar Cycle. - 1 online resource (132 pages)

Source: Dissertation Abstracts International, Volume: 79-01(E), Section: B.

Thesis (Ph.D.)--University of California, San Diego, 2017.

Includes bibliographical references

The influence of the lunar cycle on dolphin foraging behavior was investigated in the productive, southern California Current Ecosystem and the oligotrophic Hawaiian Archipelago. Passive acoustic recordings from 2009 to 2015 were analyzed to document the presence of echolocation from four dolphin species that demonstrate distinct foraging preferences and diving abilities. Visual observations of dolphins, cloud coverage, commercial landings of market squid (Doryteuthis opalescens) and acoustic backscatter of fish were also considered in the Southern California Bight.

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

Mode of access: World Wide Web

ISBN: 9780355314335Subjects--Topical Terms:

1178855
Biological oceanography.
Index Terms--Genre/Form:

554714
Electronic books.

By the Light of the Moon : = North Pacific Dolphins Optimize Foraging with the Lunar Cycle.
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100 1 $a Simonis, Anne Elizabeth. $3 1186132
245 1 0 $a By the Light of the Moon : $b North Pacific Dolphins Optimize Foraging with the Lunar Cycle.
264 0 $c 2017
300 $a 1 online resource (132 pages)
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500 $a Source: Dissertation Abstracts International, Volume: 79-01(E), Section: B.
500 $a Advisers: Simone Baumann-Pickering; John A. Hildebrand.
502 $a Thesis (Ph.D.)--University of California, San Diego, 2017.
504 $a Includes bibliographical references
520 $a The influence of the lunar cycle on dolphin foraging behavior was investigated in the productive, southern California Current Ecosystem and the oligotrophic Hawaiian Archipelago. Passive acoustic recordings from 2009 to 2015 were analyzed to document the presence of echolocation from four dolphin species that demonstrate distinct foraging preferences and diving abilities. Visual observations of dolphins, cloud coverage, commercial landings of market squid (Doryteuthis opalescens) and acoustic backscatter of fish were also considered in the Southern California Bight.
520 $a The temporal variability of echolocation is described from daily to annual timescales, with emphasis on the lunar cycle as an established behavioral driver for potential dolphin prey. For dolphins that foraged at night, the presence of echolocation was reduced during nights of the full moon and during times of night that the moon was present in the night sky.
520 $a In the Southern California Bight, echolocation activity was reduced for both shallow- diving common dolphins (Delphinus delphis) and deeper-diving Risso's dolphins (Grampus griseus) during times of increased illumination. Seasonal differences in acoustic behavior for both species suggest a geographic shift in dolphin populations, shoaling scattering layers or prey switching behavior during warm months, whereby dolphins target prey that do not vertically migrate. In the Hawaiian Archipelago, deep-diving short-finned pilot whales (Globicephala macrorhynchus) and shallow-diving false killer whales (Pseudorca crassidens) also showed reduced echolocation behavior during periods of increased lunar illumination. In contrast to nocturnal foraging in the northwestern Hawaiian Islands, false killer whales in the main Hawaiian Islands mainly foraged during the day and the lunar cycle showed little influence on their nocturnal acoustic behavior. Different temporal patterns in false killer whale acoustic behavior between the main and northwestern Hawaiian Islands can likely be attributed to the presence of distinct populations or social clusters with dissimilar foraging strategies.
520 $a Consistent observations of reduced acoustic activity during times of increased lunar illumination show that the lunar cycle is an important predictor for nocturnal dolphin foraging behavior. The result of this research advances the scientific understanding of how dolphins optimize their foraging behavior in response to the changing distribution and abundance of their prey.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
650 4 $a Biological oceanography. $3 1178855
650 4 $a Ecology. $3 575279
650 4 $a Behavioral sciences. $3 1148596
655 7 $a Electronic books. $2 local $3 554714
690 $a 0416
690 $a 0329
690 $a 0602
710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a University of California, San Diego. $b Oceanography. $3 1185907
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