Show simple item record

dc.contributor.authorStrasburger, Wesley Wayne
dc.date.accessioned2018-05-22T23:38:04Z
dc.date.available2018-05-22T23:38:04Z
dc.date.issued2012-08
dc.identifier.urihttp://hdl.handle.net/11122/8420
dc.descriptionThesis (M.S.) University of Alaska Fairbanks, 2012en_US
dc.description.abstractPoor recruitment success during warm years (e.g., 2001-2005) was hypothesized to lead to reduced gadid recruitment in the southeastern Bering Sea. These groundfishes are of particular importance, both commercially and ecologically in the southeastern Bering Sea. The spatial and temporal overlap of early life stages of walleye pollock and Pacific cod may explain their strongly correlated recruitment trends in the southeastern Bering Sea. The goal of this study was to compare feeding patterns of larval and juvenile walleye pollock (Theragra chalcogramma) and Pacific cod (Gadus macrocephalus) in the southeastern Bering Sea, and to assess the possibility of prey resource competition. Larvae and juveniles from both species collected between May and September 2008, an exceptionally cold year, were used to analyze stomach contents. Fish body size was most consistently related to diet composition within species, however, spatial and depth factors also had an influence. Feeding success and diet composition of these two gadid species were consistently different throughout the spring, summer, and especially fall seasons. Pacific cod larvae and juveniles consistently consumed larger prey items in every season and progressively fewer prey items, especially in the fall. This data suggests that competition for prey resources was unlikely during cold 2008.en_US
dc.language.isoen_USen_US
dc.subjectWalleye pollocken_US
dc.subjectFooden_US
dc.subjectEcologyen_US
dc.subjectBering Seaen_US
dc.subjectPacific coden_US
dc.subjectLarvaeen_US
dc.titleFeeding ecology of larval and juvenile walleye pollock (Theragra chalcogramma) and Pacific cod (Gadus macrocephalus) in the Southeastern Bering Seaen_US
dc.typeThesisen_US
dc.type.degreemsen_US
dc.identifier.departmentGraduate Program in Fisheries Divisionen_US
dc.contributor.chairHillgruber, Nicola
dc.contributor.committeePinchuk, Alexei
dc.contributor.committeeMueter, Franz
refterms.dateFOA2020-03-05T15:40:55Z


Files in this item

Thumbnail
Name:
Strasburger_W_2012.pdf
Size:
5.242Mb
Format:
PDF

This item appears in the following Collection(s)

Show simple item record