ScholarSpace will be brought offline for upgrades on Wednesday December 9th at 11AM HST. Service will be disrupted for approximately 2 hours. Please direct any questions to

Show simple item record

Item Description

dc.contributor.advisor Young, Richard en_US Parry, Matthew P. en_US 2008-10-25T00:03:05Z 2008-10-25T00:03:05Z 2003 en_US
dc.identifier en_US
dc.description Thesis (Ph. D.)--University of Hawaii at Manoa, 2003. en_US
dc.description Mode of access: World Wide Web. en_US
dc.description Includes bibliographical references (leaves 37-43). en_US
dc.description Electronic reproduction. en_US
dc.description Also available by subscription via World Wide Web en_US
dc.description iii, 285 leaves, bound ill. 29 cm en_US
dc.description.abstract This paper examines the trophic ecology of the squids Ommastrephes bartramii and Sthenoteuthis oualaniensis, using stomach contents and stable isotopic techniques. Simple energetics models were constructed using some of the data collected. Samples for stomach contents were collected from 1996-2001 and 323 O. bartramii and 302 S. oualaniensis were captured. Fish and cephalopod remains dominated the stomach contents. Myctophids were found most abundantly in both squids, Symbolophorus evermanni was recovered at the highest percentage (7.5%) in O. bartramii, while M. lychnobium or spinosum, Lobianchia gemellerii, and Myctophum selenoides were all recovered at similar proportions (≃5%). Of the Myctophidae found in S. oualaniensis stomachs, S. evermanni was the most abundant (37%), followed by C. warmingii and H. proximum/rheinhardti (both ≃15%), and M. Iychnobium (5%). Beaks from Onychoteuthidae occurred most frequently (14%) in O. bartramii, while Histioteuthidae, Enoploteuthidae, and unidentified beaks all occurred at similar frequencies (10-12%). In S. oualaniensis, Enoploteuthidae occurred most frequently (17%) followed by Onychoteuthidae (10%). The diet of O. bartramii was more general while S. oualaniensis diet was more specialized on certain prey groups. From 1998-2001 samples were taken from captured squids for stable isotope analyses, 143 O. bartramii and 160 S. oualaniensis. SIA was conducted on the mantle muscle of O. bartramii that were divided into five categories based on mantle length, (1-7 mm) was 6.4 , (75-100 mm) was 6.9 , (200-300 mm) was 11.1 , (300-400) was 13.3%, (400-570 mm) was 12.8 . The S15N values for all O. bartramii mantle muscle samples showed a logistic increase with mantle length. The mean S15N value for S. oualaniensis sub-adult and adult mantle muscle (128 to 324 mm) was 8.2 The mean S15N value for paralarvae was 6.2 . The S15N values for all S. oualaniensis mantle muscle samples showed an exponential increase with mantle length. Eye lenses, and blood samples were also taken from each squid species and showed similar patterns of S15N increase with mantle length respectively, blood was unavailable in the smaller size ranges of O. bartramii. en_US
dc.format electronic resource en_US
dc.language.iso en-US en_US
dc.publisher University of Hawaii at Manoa en_US
dc.relation Theses for the degree of Doctor of Philosophy (University of Hawaii at Manoa). Oceanography (Marine Biology); no. 4309 en_US
dc.rights All UHM dissertations and theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission from the copyright owner. en_US
dc.rights.uri en_US
dc.title The trophic ecology of two ommastrephid squid species, Ommastrephes bartramii and Sthenoteuthis oualaniensis, in the north Pacific sub-tropical gyre en_US
dc.type Thesis en_US
dc.type.dcmi Text en_US
dc.contributor.department Oceanography (Marine Biology) en_US 2003-05 en_US
local.identifier.callnumber AC1 .H3 no. 4309 en_US
local.thesis.degreelevel PhD en_US

Item File(s)

Description Files Size Format View
Restricted for viewing only uhm_phd_4309_r.pdf 11.04Mb PDF View/Open
For UH users only uhm_phd_4309_uh.pdf 11.04Mb PDF View/Open

This item appears in the following Collection(s)

Show simple item record


Advanced Search


My Account