Index Catalog // ScholarsArchive@OSU

Top-down Influences of bald eagles on common murre populations in Oregon

Creator:: Horton, Cheryl A.
Abstract:: Populations of organisms are influenced by both top-down (predator driven) and bottom-up (environment or resource driven) effects. Seabird research has largely focused on bottom-up factors influencing reproduction, with little emphasis on top-down. Our goal was to better understand top-down impacts on colonial nesting seabirds over a range of spatio-temporal scales....
Resource Type:: Masters Thesis
Full Text:: in Oregon AN ABSTRACT OF THE THESIS OF Cheryl A. Horton for the degree of Master

An investigation of the utilization of four study areas in Yaquina Bay, Oregon, by hatchery and wild juvenile salmonids

Creator:: Myers, Katherine West Whitney
Abstract:: Results of a study of spatial and temporal utilization of a tidal river estuary by hatchery and wild juvenile salmonids (Oncorhynchus spp. and Salmo spp,), of overlap in food habits of hatchery and wild juvenile salmonids, and of size and relative abundance of associated fish species are reported in this...
Resource Type:: Masters Thesis

Fertilization of salmonid eggs with cryopreserved sperm

Creator:: Ott, Alvin G.
Abstract:: Numerous fishery researchers have attempted to preserve viable fish sperm, but only three investigations were successful in the fertilization of fresh eggs with frozen and thawed sperm: Blaxter (1953); Hoyle and Idler (1968); and Graybill and Horton (1969). Significant advances reported in this thesis were: the development of suitable life...
Resource Type:: Masters Thesis
Full Text:: EGGS WITH CRYO- PRESERVED SPERM Abstract approved: Howard F. Horton Numerous fishery researchers

Cryobiological investigations of the gametes of the Pacific oyster

Creator:: Staeger, William Henry
Resource Type:: Masters Thesis
Full Text:: . Horton Crassostrea gigas sperm were cyropreserved in liquid nitrogen vapor and subsequently used to

Biology of the Rex sole, Glyptocephalus zachirus Lockington, in waters off Oregon

Creator:: Hosie, Michael J.
Abstract:: Data are presented on the life history and population dynamics of rex sole (Glyptocephalus zachirus Lockington) collected from Oregon waters between September 1969 and October 1973. Length-weight relationships vary little between sexes or with time of year. Otolith annuli form primarily from January through May and were used for age...
Resource Type:: Masters Thesis
Full Text:: ACKNOWLE DGEMENTS I would like to express appreciation to Dr. Howard F. Horton (Professor of Fisheries

Comparative growth of juvenile Pacific oysters (Crassostrea gigas) fed unialgal vs. synthesized diets

Creator:: Toner, Margaret Ann
Abstract:: The results of research designed to develop a synthesized diet as a substitute or supplement to algae for culturing the Miyagi strain of juvenile Pacific oysters, Crassostrea gigas (Thunberg) are reported. The growth of juvenile Pacific oysters fed equal amounts (based on ash free dry weights [AFDW]) of algae (Pseudoisochrysis...
Resource Type:: Masters Thesis
Full Text:: Privacy Abstract approved: Howard F. Horton The results of research designed to develop a synthesized

Evaluation of the sample ratio of sublegal to legal male crabs used to predict harvest of Dungeness crab (Cancer magister)

Creator:: Shaul, Warren
Abstract:: The sample ratio of sublegal to legal male crabs retained in crab pots was used in calculations to predict future harvest of Dungeness crabs, Cancer magister, along the Oregon coast. Accurate predictions by this method require a sample ratio representative of the population ratio. I sampled the Oregon Dungeness crab...
Resource Type:: Masters Thesis
Full Text:: (Cancer magister). Abstract approved: Redacted for Privacy Dr. Howar(F. Horton The sample ratio of

Life history of the snake prickleback Lumpenus sagitta Wilimovsky, 1956

Creator:: Tresierra-Aguilar, Alvaro
Abstract:: Data are presented on the life history of snake pricklebacks, Lumpenus sagitta, collected in Yaquina Bay, Oregon, from June 1977 to October 1978. Specimens were collected primarily by beach seine from four sampling sites in the bay. Snake pricklebacks feed on algae (mainly genus Enteromorpha), on polychaeta (mainly genus Neoamphitrite),...
Resource Type:: Masters Thesis
Full Text:: . Horton, for suggesting this research, and for providing me with his friendly advice and all the

Food habits and species composition of neritic reef fishes off Depoe Bay, Oregon

Creator:: Steiner, Richard George
Abstract:: The distribution and trophic ecology of neritic reef fishes was studied to provide biological information useful in conserving these stocks. Houk and line fishing was conducted from July 1976 to July 1977 on neritic reefs within 5 km of the Oregon coast adjacent to Depoe Bay. Sampling was designed to...
Resource Type:: Masters Thesis
Full Text:: NERITIC REEF FISHES OFF DEPOE BAY, OREGON Abstract approved: Redacted for Privacy Dr. Howard F. Horton

Feeding ecology and aspects of the biology of largemouth bass, rainbow trout, brown trout, and relict dace and the dietary overlap of largemouth bass and rainbow trout with canvasback and redhead ducks at Ruby Marsh, Nevada

Creator:: Carmichael, Richard W. (Richard William)
Resource Type:: Masters Thesis
Full Text:: particularly like to express my appreciation to Dr. Howard F. Horton, my major professor, for his support

ScholarsArchive@OSU

Top-down Influences of bald eagles on common murre populations in Oregon

An investigation of the utilization of four study areas in Yaquina Bay, Oregon, by hatchery and wild juvenile salmonids

Fertilization of salmonid eggs with cryopreserved sperm

Cryobiological investigations of the gametes of the Pacific oyster

Biology of the Rex sole, Glyptocephalus zachirus Lockington, in waters off Oregon

Comparative growth of juvenile Pacific oysters (Crassostrea gigas) fed unialgal vs. synthesized diets

Evaluation of the sample ratio of sublegal to legal male crabs used to predict harvest of Dungeness crab (Cancer magister)

Life history of the snake prickleback Lumpenus sagitta Wilimovsky, 1956

Food habits and species composition of neritic reef fishes off Depoe Bay, Oregon

Feeding ecology and aspects of the biology of largemouth bass, rainbow trout, brown trout, and relict dace and the dietary overlap of largemouth bass and rainbow trout with canvasback and redhead ducks at Ruby Marsh, Nevada

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