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In this dissertation I investigate the role of: (a) females (besides mating) in the amphipod's mating system; (b) different processes leading to assortative mating; (c) whether operational sex ratio, weight structure of the population, local...
2009-10-05
2009-10-05
1994-07-31
How does sediment size affect organic matter (OM) dynamics in developing floodplains where the soils are young and fluvial sorting creates pronounced patterns in sediment size distribution? Texture is a primary influence on soil biogeochemistry,...
2009-10-05
2009-10-05
2014-07-31
At least ten fish stocks migrate in the Gulf of Thailand and are shared by Cambodia, Malaysia, Thailand, and Vietnam. This biological phenomenon became important in fishery management after these four littoral states extended their national...
2009-10-05
2009-10-05
2014-07-31
Sea otters (Enhydra lutris) once ranged throughout the coastal regions of the north Pacific. They were extirpated over much of their range due to extensive hunting associated with the fur trade of the 18th and 19th centuries. The widespread...
2009-10-05
2009-10-05
2014-07-31
The genetic population structure of geoduck clams (Panopea abrupta ) in inland waters of Washington may influence fishery management and aquacultural practices involving this species. To investigate genetic differentiation in geoduck clams, novel...
2009-10-05
2009-10-05
2014-07-31
The morphology, physiology, survival and behavior of chum (Oncorhynchus keta), coho (O. kisutch), and chinook (O. tshawytscha) salmon and steelhead trout (Salmo gairdneri) alevins were studied to determine if specific adaptive responses have...
2009-10-05
2009-10-05
1987-07-31
The study initially involved isolation and identification of strong chitinoclasts from natural habitat. The isolates were mostly Vibrios, with a smaller percentages of Pseudomonas, Cytophaga and Streptomyces.Among the isolated chitinoclastic...
2009-10-05
2009-10-05
1982-07-31
Shortraker and rougheye rockfish have been managed as a management subgroup of the slope rockfish assemblage since 1991. Careful examination of the survey and fishery data revealed several shortcomings for the current management system, the fixed...
2009-10-05
2009-10-05
1998-07-31
Infectious hematopoietic necrosis virus (IHNV) is a rhabdovirus which causes a serious disease in salmonid fish. T$\sb1$ ribonuclease fingerprinting of viral genomic RNA was used to study genetic variation among 26 isolates of IHNV recovered from...
2009-10-05
2009-10-05
1991-07-31
Chinook salmon display a wide variation in the age, size, and season of smolting. Understanding the basis of variations in smolting requires elucidation of the mechanism(s) that stimulate smolting. This dissertation focuses on how environmental...
2009-10-05
2009-10-05
2014-07-31
Vibrio vulnificus is a Gram negative, halophilic bacterium, which is a natural inhabitant of sub tropical and tropical marine estuarine waters. These bacteria concentrate in filter-feeding mollusks such as oysters and unlike fecal contaminants are...
2009-10-05
2009-10-05
2014-07-31
Rabbitfish are a preferred foodfish to the people of Micronesia yet their numbers are declining on the reef flat. There is interest in the culture of these fish throughout the islands for local consumption as well as export, but culture is not yet...
2009-10-05
2009-10-05
1997-07-31
A conceptual model is proposed that relates Dungeness crab (Cancer magister) year class strength to variable advection during the pelagic larval phase, restrictive juvenile habitat requirements and density-dependent effects during the first (0+)...
2009-10-05
2009-10-05
1991-07-31
Recovery efforts for federally listed salmon stocks under the U.S. Endangered Species Act highlight the difficulty of making management decisions in the face of uncertainty. This study investigates the impact of prevalent sources of epistemic...
2009-10-05
2009-10-05
2014-07-31
The volatility of pelagic fisheries in the California Current (CC) system has long been a challenge for the west coast fishing community. Over the last century, a number of west coast pelagic stocks have undergone large fluctuations in abundance....
2009-10-05
2009-10-05
2014-07-31
We studied three aspects of local adaptation in sockeye salmon populations in southwest Alaska. The first study related morphology of fish at the time of the commercial fishery, which is size-selective, to morphology of spawning adults. We...
2009-10-05
2009-10-05
2014-07-31
The Sunda Shelf area of the South China Sea is a productive demersal fishing ground, bordered by Vietnam, Cambodia, Thailand, Malaysia, and Singapore. Offshore exploitation did not begin until the late 1960s when introduction of new technology...
2009-10-05
2009-10-05
1981-07-31
A simple sperm cell bioassay, primarily using sea urchin gametes, was refined to yield a quick, sensitive, and cost-effective procedure for measuring toxicity in marine waters. Sperm bioassays were conducted by exposing sperm cells to test...
2009-10-05
2009-10-05
1984-07-31
The Everglades is a unique ecosystem that has been fundamentally altered in the last seventy years. The system of connected sloughs, marshes, and wet prairies were drained to promote agriculture and urbanization. Because the drainage of the...
2009-10-05
2009-10-05
2014-07-31
Atka mackerel, Pleurogrammus monopterygius, are found in dense aggregations in the Aleutian Islands. Their highly contagious distribution makes them difficult to survey with the current NMFS Service trawl survey design resulting in highly variable...
2009-10-05
2009-10-05
2014-07-31
The sequence of an hsp90 cDNA from chinook salmon (Oncorhynchus tshawytscha) was determined and compared to those from humans, rodents, chickens, fruit flies, yeast, and E. coli; it shared high identity with other published hsp90 sequences. This...
2009-10-05
2009-10-05
1998-07-31
The influence of sexual selection on overall mating patterns and mate choice in chum salmon demes was examined by observing fish in an experimental stream and viewing chamber. Males remained sexually active throughout most of their spawning ground...
2009-10-05
2009-10-05
1981-07-31
Population abundance is a key parameter in wildlife research, assessment, and management. It is often used to monitor trends across time, as input parameters in population and ecosystem modeling and to investigate habitat changes. The often low...
2009-10-05
2009-10-05
2014-07-31
The foraging ecology and population dynamics of harbor seals ( Phoca vitulina richardsi) were studied in Hood Canal, Washington from 1998 to 2005. Initial work was conducted in response to concerns over the potential impact seals may have on...
2009-10-05
2009-10-05
2014-07-31
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