Download or read book The Status of the California Yellowtail Resource and Its Management written by Robson A. Collins and published by . This book was released on 1973 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Biology of Yellowtail Seriola Lalandi in the Southern California Bight written by Noah Ben-Aderet and published by . This book was released on 2017 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most organisms shift between different ecological niches or habitats throughout their lives. These shifts are prompted by growth and changing resource needs. In the marine realm, understanding why and when fish shift habitats is particularly important due to the increasing use of spatial management as a conservation strategy. Effective spatial management requires understanding how a species habitat usage changes throughout its lifespan. Within the Southern California Bight (SCB)Yellowtail (Seriola lalandi) are iconic gamefish and widely targeted throughout the region, both in U.S. and Mexican territorial waters. Their cross-border movements mean these fish encounter a diverse array of anthropogenic pressures, ranging from ocean-warming to agricultural and urban run-off to significant recreational, artisanal, and commercial fishing. This work attempts to understand and quantify how yellowtail use the Southern California Bight and how that usage affects their biology. This was carried out in 3 separate chapters dealing with analysis of long-term recreational catch records, conventional tagging, passive acoustic telemetry as well as spatially-explicit analysis of age, growth, diet and trophic position. The primary differences detected across all investigated parameters were size-mediated. Thus, one contiguous population with distinct ontogenetic shifts in habitat and diet is the most parsimonious explanation for the results from each chapter presented in this thesis. Recreational catch data showed inshore and offshore catch sizes were different between years and across seasons and fish size, rather than tagging season best explained detection rates of acoustically tagged fish. These findings supported claims by recreational anglers that large fish caught inshore are potentially year-round SCB residents. The conclusion of one, panmictic, SCB yellowtail population is further supported by results from life-history analysis as fish size again was the only source of significant differences in age/growth, diet, or trophic position regardless of sampling location or region. Results from tag returns, acoustic telemetry and life-history analysis indicate that there is likely one contiguous population of yellowtail in the SCB and that due to high levels of fishing pressure, this population may be reliant on seasonal influxes of fish from the south to sustain current fishing levels.

Download or read book Offshore Fishes of California written by California. Department of Fish and Game and published by . This book was released on 1963 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Understanding and Optimizing Growth and Development of California Yellowtail Seriola Dorsalis in Aquaculture Using Physiological Tools written by Laura Nicole Schwebel and published by . This book was released on 2017 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: Physical fitness metrics were used to assess the health and development of California Yellowtail, Seriola dorsalis, in an aquaculture environment during two grow-out experiments. The first experiment sought to evaluate the effects of a common aquaculture deformity (an improperly inflated swim bladder) that has been hypothesized to impact energy allocation, growth, and development. Metrics including metabolic rate, critical swimming speed, feed conversion ratio, and growth rate, were monitored over a 32-week period in three groups of California Yellowtail: wild-caught ("wild"), healthy hatchery-reared ("inflated"), and hatchery-reared with uninflated swim bladders ("uninflated"). At the start of the grow-out period, wild fish had a significantly lower standard metabolic rate (3.08 ± 0.23 mgO2 min-1 kg-1) than both the inflated and uninflated groups (5.60 ± 0.54 and 6.45 ± 0.66 mgO2 min-1 kg-1, respectively), but this difference was not maintained over time. After a 32-week growout, inflated fish had significantly greater mass (758.6 ± 92.7 g vs. 671.1 ± 128.9 g wild, 636.1 ± 80.4 g uninflated) and girth (23.2 ± 1.1 cm vs. 21.6 ± 1.7 cm wild, 21.5 ± 1.2 cm uninflated) than the other two groups, while uninflated fish had significantly shorter BL (36.5 ± 1.9 cm vs. 38.4 ± 2.7 cm wild, 39.6 ± 2.0 cm inflated). However, the wild fish had the most efficient feed conversion (1.41 vs. 1.49 inflated, 2.08 uninflated) and needed 5.8% less feed than the inflated group, and 47.8% less feed than the uninflated group to gain equivalent mass. In addition to indicating that it wouldn't be economical to rear yellowtail with uninflated swim bladders due to their poor growth rates and feed conversion ratios, the results of this experiment revealed that there is room for improvement in the fitness of healthy aquaculture-reared yellowtail by potentially lowering their metabolic rate and feed conversion ratios. The subsequent experiment introduced exercise (which is typically lacking in aquaculture) as a means for improvement of fitness in hatchery-reared fish, and aimed to determine if a short duration of exercise could have lasting effects on the fitness of cultured yellowtail. Fish were forced to swim continuously against a flow in custom designed raceways for two, three, or four weeks, following which, metabolic rate, growth rate, and feed conversion were assessed over a 24-week grow-out period. Results showed that the duration of exercise may have an impact on standard metabolic rate immediately following exercise, with the exercised groups showing about a 9-15% reduction in metabolic rate. However, initial metabolic differences were not retained over time. Similarly, growth rates were stimulated by exercise, potentially because their lower standard metabolic rate reflected more efficient resource use and the ability to efficiently gain weight; however, the positive growth response also weakened with time. These results indicate that exercise could play an important role in the development of this species; however, the timing (e.g. yellowtail life stage and duration of exercise) and environmental variables (e.g. temperature and flow speed) likely play important roles in optimizing the response.

Download or read book Journal of the Assembly Legislature of the State of California written by California. Legislature. Assembly and published by . This book was released on 1942 with total page 1608 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ecological Studies of the Sacramento San Joaquin Estuary written by and published by . This book was released on 1966 with total page 1108 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Outdoor California written by and published by . This book was released on 1977 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Journal of the Assembly During the Session of the Legislature of the State of California written by California. Legislature. Assembly and published by . This book was released on 1959 with total page 1608 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Photographic Guide to Diseases of Yellowtail Seriola Fish written by Mark Sheppard and published by Campbell River, B.C. : M. Sheppard. This book was released on 2004 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A E written by Library of Congress. Office for Subject Cataloging Policy and published by . This book was released on 1990 with total page 1548 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Life history and Growth of the Pismo Clam written by Frank Walter Weymouth and published by . This book was released on 1923 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt: Commercially the Pismo clam (Tivela stultorum)ranks first in importance in California among the clams and third among all the mollusks, being exceeded only by the oyster and the abalone. A second reason for considering this species is that there has been such evidence of depletion as to lead to increasingly more stringent protective laws, all of which have been urged by the residents of the county in which the clam is most abundant. ... An accurate study of the cause and extent of this apparent diminution must await knowledge of at least the fundamental facts of the life history of this clam. ... The more important features are considered to be: the habits, enemies and mortality of the adult; the rate of growth and the factors affecting it; the age at certain significant periods, particularly at sexual maturity and at the time when the legal size is reached; the most common age of clams forming the commercial catch; the season of spawning and the productivity; and the habits, enemies and mortality of the young.

Download or read book Index to Federal Aid Publications in Sport Fish and Wildlife Restoration and Selected Cooperative Research Project Reports written by United States. General Land Office and published by . This book was released on 1968 with total page 730 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Index to Federal Aid Publications in Sport Fish and Wildlife Restoration and Selected Cooperative Research Project Reports March 1968 written by United States. Department of the Interior. Library and published by . This book was released on 1968 with total page 740 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Marine Fish Catch of California for the Year 1959 written by California. Dept. of Fish and Game. Marine Resources Division and published by . This book was released on 1960 with total page 678 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Magazine Angling Stories written by and published by . This book was released on 1906 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Circular written by and published by . This book was released on 1955 with total page 1098 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Final Environmental Impact Statement Proposed Trans Alaska Pipeline Environmental setting between Port Valdez Alaska and west coast ports written by and published by . This book was released on 1972 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt: Statement analysing the impact of granting the right-of-way applications for an oil pipeline across U.S. federal lands in Alaska would have on the environment in accordance with the requirement of the National Environmental Policy Act of 1969.