Food of the Pacific cod Gadus macrocephalus Tilesius near Kodiak Island, Alaska
Thesis (M.S.) University of Alaska Fairbanks, 1977 The Pacific cod, Gadus macroaephalus, from the Kodiak Alaska continental shelf, feeds predominantly on demersal fishes and crustaceans. The most frequently occurring food groups in Pacific cod stomachs in order of decreasing frequency of occurrence...
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ftunivalaska:oai:scholarworks.alaska.edu:11122/7366 2023-05-15T17:04:36+02:00 Food of the Pacific cod Gadus macrocephalus Tilesius near Kodiak Island, Alaska Jewett, Stephen C. 1977-08 http://hdl.handle.net/11122/7366 en_US eng http://hdl.handle.net/11122/7366 Thesis 1977 ftunivalaska 2023-02-23T21:36:50Z Thesis (M.S.) University of Alaska Fairbanks, 1977 The Pacific cod, Gadus macroaephalus, from the Kodiak Alaska continental shelf, feeds predominantly on demersal fishes and crustaceans. The most frequently occurring food groups in Pacific cod stomachs in order of decreasing frequency of occurrence are fishes, crabs, shrimps and amphipods. The snow crab, Chionoecetes bairdi, is the most frequently occurring food species. Frequency occurrence of food items in cod stomachs is enumerated within each of three cod size groups - 33 to 52 cm, 53 to 72 cm, and 73 to 92 cm. Fishes and cephalopods increase in frequency occurrence with increasing cod size. Amphipods and polychaetes are more frequently found in smaller fish. In general, the incidence of euphausiids and mysids decrease with increasing cod size. Crabs, shrimps, pelecypods and gastropods increase in frequency occurrence from the small (33 to 52 cm) to the medium size fish (53 to 72 cm) and again decline in importance among larger cod (73 to 92 cm). Thesis Kodiak Snow crab Alaska Chionoecetes bairdi University of Alaska: ScholarWorks@UA Fairbanks Pacific |
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Open Polar |
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University of Alaska: ScholarWorks@UA |
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ftunivalaska |
language |
English |
description |
Thesis (M.S.) University of Alaska Fairbanks, 1977 The Pacific cod, Gadus macroaephalus, from the Kodiak Alaska continental shelf, feeds predominantly on demersal fishes and crustaceans. The most frequently occurring food groups in Pacific cod stomachs in order of decreasing frequency of occurrence are fishes, crabs, shrimps and amphipods. The snow crab, Chionoecetes bairdi, is the most frequently occurring food species. Frequency occurrence of food items in cod stomachs is enumerated within each of three cod size groups - 33 to 52 cm, 53 to 72 cm, and 73 to 92 cm. Fishes and cephalopods increase in frequency occurrence with increasing cod size. Amphipods and polychaetes are more frequently found in smaller fish. In general, the incidence of euphausiids and mysids decrease with increasing cod size. Crabs, shrimps, pelecypods and gastropods increase in frequency occurrence from the small (33 to 52 cm) to the medium size fish (53 to 72 cm) and again decline in importance among larger cod (73 to 92 cm). |
format |
Thesis |
author |
Jewett, Stephen C. |
spellingShingle |
Jewett, Stephen C. Food of the Pacific cod Gadus macrocephalus Tilesius near Kodiak Island, Alaska |
author_facet |
Jewett, Stephen C. |
author_sort |
Jewett, Stephen C. |
title |
Food of the Pacific cod Gadus macrocephalus Tilesius near Kodiak Island, Alaska |
title_short |
Food of the Pacific cod Gadus macrocephalus Tilesius near Kodiak Island, Alaska |
title_full |
Food of the Pacific cod Gadus macrocephalus Tilesius near Kodiak Island, Alaska |
title_fullStr |
Food of the Pacific cod Gadus macrocephalus Tilesius near Kodiak Island, Alaska |
title_full_unstemmed |
Food of the Pacific cod Gadus macrocephalus Tilesius near Kodiak Island, Alaska |
title_sort |
food of the pacific cod gadus macrocephalus tilesius near kodiak island, alaska |
publishDate |
1977 |
url |
http://hdl.handle.net/11122/7366 |
geographic |
Fairbanks Pacific |
geographic_facet |
Fairbanks Pacific |
genre |
Kodiak Snow crab Alaska Chionoecetes bairdi |
genre_facet |
Kodiak Snow crab Alaska Chionoecetes bairdi |
op_relation |
http://hdl.handle.net/11122/7366 |
_version_ |
1766058896598761472 |