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Articles 31 - 35 of 35
Full-Text Articles in Aquaculture and Fisheries
Multiscale Habitat Suitability Modeling For Canary Rockfish (Sebastes Pinniger) Along The Northern California Coast, Portia N. Saucedo
Multiscale Habitat Suitability Modeling For Canary Rockfish (Sebastes Pinniger) Along The Northern California Coast, Portia N. Saucedo
Cal Poly Humboldt theses and projects
Detailed spatially-explicit data of the potential habitat of commercially important rockfish species are a critical component for the purposes of marine conservation, evaluation, and planning. Predictive habitat modeling techniques are widely used to identify suitable habitat in un-surveyed regions. This study elucidates the predicted distribution of canary rockfish (Sebastes pinniger) along the largely un-surveyed northern California coast using data from visual underwater surveys and predictive terrain complexity covariates. I used Maximum Entropy (MaxEnt) modelling software to identify regions of suitable habitat for S. pinniger greater than nine cm in total length at two spatial scales. The results of …
Baseline Monitoring And Characterization Of Rocky Intertidal Fish Communities In Northern California, Kevin D. Hinterman
Baseline Monitoring And Characterization Of Rocky Intertidal Fish Communities In Northern California, Kevin D. Hinterman
Cal Poly Humboldt theses and projects
A network of new Marine Protected Areas (MPAs) has been established in northern California, covering 137 square miles of coastline, with the goal of maintaining commercially and recreationally important species and to preserve biodiversity. This is the first study in California to create a biodiversity and phylogenetic baseline of rocky intertidal fish communities within MPAs and nearby reference sites. Diversity, abundance, and size structure of intertidal fishes were compared among seven sites from Fort Bragg to Crescent City, CA during the summers and winters of 2014 and 2015. A total of 34 species were collected throughout sampling, just three less …
Juvenile Survival And Adult Return As A Function Of Freshwater Rearing Life History For Coho Salmon In The Klamath River Basin, Molly Gorman
Juvenile Survival And Adult Return As A Function Of Freshwater Rearing Life History For Coho Salmon In The Klamath River Basin, Molly Gorman
Cal Poly Humboldt theses and projects
The Scott and Shasta rivers, Klamath River tributaries, experience spatial disparity in habitat quality in spring and summer as a result of historical and current land-use. Juvenile Coho Salmon (Oncorhynchus kisutch) born in the upper tributary reaches often rear in natal streams before migrating to sea. However, those born in the lower reaches often encounter unsuitable habitat and emigrate during their first spring to seek non-natal rearing habitats. It is assumed that these early outmigrants are population losses. This study evaluated first-summer survival, and contribution to the adult population, of non-natal rearing juveniles in the Klamath River Basin. …
Evaluation Of Parameter Estimation And Field Application Of Transgenerational Genetic Mark-Recapture, Ryan W. Whitmore
Evaluation Of Parameter Estimation And Field Application Of Transgenerational Genetic Mark-Recapture, Ryan W. Whitmore
Cal Poly Humboldt theses and projects
Use of a genetic-based analogue of the traditional mark-recapture method (transgenerational genetic mark-recapture, tGMR) is rapidly expanding as a means to estimate total escapement of Pacific salmon. The tGMR approach is similar to the simple Lincoln-Peterson mark-recapture method. In tGMR, adults returning to fresh water to spawn are collected in the first sampling occasion and their juvenile offspring that are migrating out to sea are collected during the second sampling occasion. Recaptures are determined by the number of parent-offspring pairs identified through genetic parentage analysis of the adult and juvenile collections. Two versions of tGMR are currently in use, referred …
Age And Growth Of Largemouth Bass At Freshwater Lagoon, Humboldt County, California, Stephen Will Pagliughi
Age And Growth Of Largemouth Bass At Freshwater Lagoon, Humboldt County, California, Stephen Will Pagliughi
Cal Poly Humboldt theses and projects
The quality of the largemouth bass fishery at Freshwater Lagoon was evaluated by assessing age structure, stock structure, condition, and growth characteristics. A total of 1,511 largemouth bass was sampled from 1986 through 2000 using a boat electroshocker. Scales were collected from 706 fish and assigned ages. Eleven age classes were identified with a maximum age of 10 years. Age assignment precision between two readings was 95%. Paired scale and otolith (sagittae) samples were collected via hook-and-line from 20 largemouth bass in spring and early summer of 2002. The agreement rate of age determination between structures was used as a …