During eleven cruises conducted off the Oregon continental
slope from April 1973 to March 1975, approximately 1600 specimens
of the majid crab Chionoecetes tanneri Rathbun were collected.
A time sequence of size frequency histograms and bivariate plots of
allometric measurements were used to determine size classes,
population structure, growth and...
Bimonthly plankton samples were collected from 1969 through
1971 along a transect off the central Oregon continental shelf (44°
39. l'N) to document the species of crab larvae present, their seasonality,
and their onshore-offshore distribution in relation to seasonal
changes in oceanographic conditions. A comprehensive key with
plates is given...
The claw shuddering display of the shore crab Hemigrapsus oregonensis was explored with acoustic and behavioral observations. Male H.
oreqonensis stridulate during claw shuddering display. The stridulatory apparatus is present only on the males. The acoustic signal was of brief duration, showed a general pattern of sound bursts, but varied...
Results of studies beginning in 1947 on the biology of the Dungeness crab (Cancer magister) in Oregon coastal waters are reported. A review is made of the history of the fishery with regard to trend of the catch by magnitude, area, and season; the development and conduct of the fishery...
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...
"The Shellfish Investigation samples the crab catch along the Oregon coast each year for shell condition as an index to meat yield and suitability of season opening dates. In addition to sampling for condition, a number of animals are sampled for width frequencies to determine the mean size of crabs...
In mid-December, 1948, during the time the crab season was closed in State waters, a boat caught crabs outside the entrance to the Columbia River, which was outside the three-mile jurisdictional limit. Because "one man was already fishing," the crab fleet members began to complain and threaten to fish before...
"During the first year of the program successful culture methods were developed for rearing Dungeness crab larvae (Reed 1966). The purpose of the second years work was to define the effects of wide ranges of temperature and salinity on survival and growth of Dungeness crab larvae." (p.1) Includes charts, graphs...
"Construction of a larval rearing system and development of rearing techniques for Dungeness crab larvae were the objectives of the first year's program. Preliminary work involved a literature search, consultation with biologists involved with molluscan and crustacean larval culture, and the design of a rearing system based on the success...
"Culture methods for Dungeness crab larvae and the effects of temperature and salinity on larval survival and growth were covered in previous progress reports (Reed, 1966 and 1967). This report covers studies conducted from July 1,1967, through June 30, 1968 to determine the effects of various laboratory diets and diet...
It is possible that the large fluctuations In annual Dungeness crab landings are caused by displacement of crab larvae by currents. We studied the effects of various environmental factors on crab larvae survival and behavior. Tests were conducted on cultured zoeae and megalopae and on wild megalopae.
Our studies showed...
"This report covers studies conducted on Dungeness crab larvae from July 1, 1969, through June 19, 1970. Principal objectives were to determine the following: (1) the effects of crab larval concentration on growth and survival; (2) the effects of light intensity on the swimming behavior of crab larvae; (3) the...
"Objectives during the July 1, 1968, to June 30. 1969, project period were to determine the following: 1. The effects of diet concentration on survival and growth. 2. The effects of crab larval concentration on survival. 3. The effects of diet concentration on cannibalism. 4. The effects of light intensity...
The Hemigrapsus oregonensis population at Coquille Point in
the Yaquina Bay Estuary on the Central Oregon Coast was studied
from April, 1972 through May, 1973. The population was found to be
vertically stratified from the 1 ft level to the 5 ft level. Population
densities were found to be most...
"Recent concerns have been raised by commercial crab interests relating to the size and character of the recreational fishery for dungeness crab in ocean waters off Oregon. In response to those concerns, in May of 1999 the Oregon Department of Fish and Wildlife's Ocean Sampling Project began counting the number...
In 1974, large numbers of Dungeness crabs migrated into tide pools near the South Jetty of Yaquina Bay and went through their annual molt. The public discovered the abundance of crabs, and found that they were easy prey during low tides. The situation prompted an emergency closure of the area...
Ever wonder what that jelly-like blob on the beach is? Want to know how to identify a bloom of jellyfish? This guide was created to help identify common gelatinous animals encountered at sea or beachcombing. With this guide you can appreciate the diversity of gelatinous animals on the Oregon coast...
The purpose of this report is to make the existence of the Oregon
State College xylarium and this particular collection known to interested
individuals and agencies in the United States and Canada. At
the time of writing, the collection embraces 707 samples of 181
species representing 72 genera and 31...
Published January 1973. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Published October 1961. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
The data in this document was presented to the Oregon Dungeness Crab Commission at a September 1, 2000 meeting. It summarizes the 1999/2000 Dungeness crab fishery in Oregon and gives an overview of issues of pot limits and preseason quality testing. Includes statistics.
This is an Oregon Dept. of Fish and Wildlife exhibit for a meeting of the Oregon State Fish and Wildlife Commission. "Problem: Oregon crab fishermen are concerned that 4-3/8" escape ports in crab pots allow too many legal male crabs to escape. Requests have been made to determine whether or...
"September, 2001, Updated October, 2002" - note from cover. "This report reviews the Oregon's ocean commercial Dungeness crab fishery. It provides both a present and historical evaluation of the fishery, its vessel effort, and gear use, but emphasizes more recent analysis and information relevant to a discussion of pot limits....
Should fishing by crab pots instead of crab rings be allowed in certain bays in Oregon? An error caused the ban on crab pots to be deleted from the statutes. This 1950 paper considers whether the ban on crabpots should be reinstated in Siletz, Yaquina and Alsea Bays. This is...
Gives statistics for catch, number of boats, number of trips, price data, crab size and grade, and number of crab pots fished. "This report includes 14 years of data to reduce costs of printing." (p.1) 157 pp.
Should commercial crabbing be banned in Oregon bays in order to eliminate potential conflict with recreational bay crabbers? In answering this question, this report summarizes the state of the bay crab fishery in the mid-1980s and examines esthetic and economic aspects of the issue. Includes statistics. This is a staff...
"The purpose of this report is to discuss the following topics: (1) a review of the Oregon crab fishery; (2) crab condition studies; (3) seasons and problems involved in setting seasons; (4) "backing" crabs prior to landing; (5) closures off river mouths; (6) pot versus ring fisheries in bays; (7)...
"The Oregon fishery for Dungeness crab has a long history. Catch records have been kept for this fishery since 1889. The management strategy for Dungeness crab is derived from these records and from our knowledge of crab biology. Management of a single species fishery such as this should be a...
The Fish Commission of Oregon was tagging Dungeness crabs in the late 1940s and early 1950s to see how far the crabs moved between moltings. This document gives data on crab tags retrieved between November 21, 1947 and February 21, 1950. Some crabs were indeed wanderers: crabs released in the...
This publication is an exhibit prepared by the Oregon Dept. of Fish and Wildlife for the Oregon State Fish and Wildlife Commission in response to a request to extend the commercial fishing season for Dungeness crabs.
"Problem: Conflicts between estuary recreational and commercial crab fishermen over fishing space and crab have increased in recent years. Some recreational crabbers have stated that commercial crabbing in estuaries should be banned." (p. 1) This is an Oregon Dept. of Fish and Wildlife exhibit for a meeting of the Oregon...
This is an account of an experiment in tagging and releasing Dungeness crabs into Yaquina Bay in early 1957. Did they travel to the ocean, to another bay, or did they stay in Yaquina Bay?
Each year, after crabs molt, there is a time when their shells are soft, and are not filled up with crab meat. This soft-shelled state is undesirable for fishers. Since the timing of molting varies from year to year, it is difficult for fishery managers to set the start date...