Download or read book Yelloweye Rockfish Sebastes Ruberrimus written by and published by . This book was released on 2014 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Operational Plan Reproductive and Biological Sampling of Yelloweye Rockfish Sebastes Ruberrimus and Black Rockfish Sebastes Melanops from Southeast Alaska Sport and Commercial Fisheries written by Kelly S. Reppert and published by . This book was released on 2022 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is a limited understanding of the reproductive biology of yelloweye rockfish (Sebastes ruberrimus) and black rockfish (S. melanops) in Alaskan waters. The purpose of this project is to sample yelloweye and black rockfish in order to estimate maturity schedules (length and age at maturity) and fecundity (both absolute and relative) in Southeast Alaska. An understanding of the reproductive biology of these rockfish species is necessary for science-based management and population dynamics modeling for stock assessment purposes. This project will estimate important life history parameters for these rockfish in Southeast Alaska.
Download or read book The Reproductive Biology of Yelloweye Rockfish Sebastes Ruberrimus in Prince William Sound and the Northern Gulf of Alaska written by Donald E. Arthur and published by . This book was released on 2020 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the last half century, Yelloweye Rockfish Sebastes ruberrimus have experienced dramatic declines along the West Coast of the United States and British Columbia. Efforts have been made throughout the species’ range to rebuild and sustainably manage stocks, including the introduction of a Statewide Rockfish Initiative by the State of Alaska, which intends to develop management strategies for Yelloweye Rockfish in the Gulf of Alaska. To support this effort and address information gaps in Yelloweye Rockfish reproductive biology throughout their range, I estimated important reproductive parameters and life history information for Yelloweye Rockfish in Prince William Sound and the Northern Gulf of Alaska, Alaska, that included maturity, parturition timing, skip spawning, and fecundity relationships. I identified that ages-at-50% maturity (A50) for males and females were similar (A50 = 15 years and A50 = 16, respectively), but males reached full maturity (A95) earlier than females (male A95 = 19 years and female A95 = 31 years). Female Yelloweye Rockfish fork length-at-50% and 95% maturity (L50 and L95) was greater in the Northern Gulf of Alaska (L50 = 46.7 cm and L95 = 55.8 cm) than in Prince William Sound (L50 = 41.1 cm and L95 = 50.2 cm). Similarly, male L50 and L95 was greater in the Northern Gulf of Alaska (L50 = 44.0 cm and L95 = 49.2 cm) relative to Prince William Sound (L50 = 40.8 cm and L95 = 46.0 cm), and males matured at a smaller size than females. Female L50 was consistent with data from southern populations, but A50 was younger than predicted based on a latitudinal trend, indicating that Yelloweye Rockfish in this region may experience greater than expected growth rates. Yelloweye Rockfish underwent parturition between May and August and peaked in June and July, and parturition timing was earlier for larger and older females. I documented that female Yelloweye Rockfish skip-spawned at a rate of 9.8%. Skip spawning rate was associated with fork length and peaked at sizes between 40.2 cm and 52.3 cm; the peak in stock reproductive potential is shifted toward larger females in response to skip spawning. I conducted egg and larvae counting in an image-analysis software, which was more than four times faster than manual counting and was equally accurate and precise. Yelloweye Rockfish fecundity scaled hyperallometrically with FL and relative fecundity increased with length, indicating that spawning stock biomass may not be proportional to total egg production. Combining these results, I found that ignoring the hyperallometric fecundity relationship and skip spawning could overestimate reproductive potential by as much as 66% and 45% for Prince William Sound and the Northern Gulf of Alaska, respectively. The results of this study will improve the estimates of stock-recruitment dynamics and can be readily integrated into a stock assessment that will guide the sustainable management of Yelloweye Rockfish in Prince William Sound and the Northern Gulf of Alaska.
Download or read book Amendment Reproductive and Biological Sampling of Yelloweye Rockfish Sebastes Ruberrimus and Black Rockfish Sebastes Melanops from Prince William Sound and the Northern Gulf of Alaska written by Brittany Blain-Roth and published by . This book was released on 2022 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report amends ROP.SF.2A.2019.09. The overall purpose of this project is to estimate the length and age maturity schedules for females of black rockfish (Sebastes melanops) and yelloweye rockfish (S. ruberrimus) across the Gulf of Alaska; document sampling protocols for future collection, identification, preservation, and processing of yelloweye and black rockfish gonads; and collect samples related to a population’s reproductive potential (i.e., age, length, fecundity, fish condition, etc.). Efforts will be divided between inside Prince William Sound (PWS) waters and Northern Gulf of Alaska waters (NGOA). Sampling goals for ROP.SF.2A.2019.09 have been met for yelloweye rockfish in NGOA and PWS. Sampling goals for female black rockfish have not been met for PWS or NGOA. This amendment to ROP.SF.2A.2019.09, which was scheduled to end in 2020, documents an extension to the timeframe of data collection to 2022 for collection of female black rockfish maturity data in Prince William Sound and NGOA.
Download or read book A Review of Yelloweye Rockfish Sebastes Ruberrimus Along the Pacific Coast of Canada Biology Distribution and Abundance Trends written by K. L. Yamanaka and published by . This book was released on 2006 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Operational Plan Reproductive and Biological Sampling of Yelloweye Rockfish Sebastes Ruberrimus and Black Rockfish Sebastes Melanops from Prince William Sound and the Northern Gulf of Alaska written by Brittany Blain-Roth and published by . This book was released on 2019 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is a limited understanding of the reproductive biology of yelloweye rockfish (Sebastes ruberrimus) and black rockfish (S. melanops) in Alaskan waters. The purpose of this project is to sample yelloweye rockfish and black rockfish in order to estimate maturity schedules (length and age at maturity) and fecundity (both absolute and relative). An increased understanding of the reproductive biology of these rockfish species is necessary for science-based management and population dynamics modeling for stock assessment purposes. This project will generate estimates of these important biological parameters for these rockfish at the northernmost extent of their range. Sampling will take place in Prince William Sound and the Northern Gulf of Alaska, including the North Gulf Coast Management Area.
Download or read book COSEWIC Assessment and Status Report on the Yelloweye Rockfish Sebastes Ruberrimus Pacific Ocean Inside Waters Population Pacific Ocean Outside Waters Population in Canada written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Management Plan for the Yelloweye Rockfish Sebastes Ruberrimus in Canada written by and published by . This book was released on 2021 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rockfish Recovery Plan Puget Sound Georgia Basin written by and published by . This book was released on 2017 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Total rockfish abundance in Puget Sound has declined approximately 70 percent in the last 40 years. Yelloweye rockfish (Sebastes ruberrimus) and bocaccio (Sebastes paucispinis) have declined to an even greater extent (Drake et al .2010). This recovery plan outlines actions and research for the conservation and survival of threatened yelloweye rockfish and endangered bocaccio using the best available science per the requirements of the Endangered Species Act (ESA). The recovery plan links management actions to an active research program to fill data gaps and a monitoring program to assess these actions' effectiveness. Research and monitoring results will provide information to refine ongoing actions and prioritize new actions to achieve the plan's goal: to restore the listed species to the point where they no longer require the protections of the ESA."--PDF Executive summary.
Download or read book Population Structure of Yelloweye Rockfish Sebastes Ruberrimus Driven by Limited Dispersal and Selection written by Matthew Ray Siegle and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book COSEWIC Assessment and Status Report on the Yelloweye Rockfish Sebastes Ruberrimus Pacific Ocean Outside Waters Population Pacific Ocean Inside Waters Population in Canada written by and published by . This book was released on 2020 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structure of Yelloweye Rockfish Sebastes Ruberrimus Populations in British Columbia written by Kae Lynne Yamanaka and published by . This book was released on 2000 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Potential Rebuilding Strategies for Inside Yelloweye Rockfish Sebastes Ruberrimus in British Columbia written by D. R. Haggarty and published by . This book was released on 2022 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recovery Potential Assessment for Yelloweye Rockfish Sebastes Ruberrimus in British Columbia written by and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Management Procedures Update and Catch Advice for 2023 24 2026 27 Fishing Seasons for Outside Yelloweye Rockfish Sebastes Ruberrimus in the Pacific Region written by and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Radiocarbon in Otoliths of Yelloweye Rockfish Sebastes Ruberrimus written by and published by . This book was released on 2003 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atmospheric testing of thermonuclear devices during the 1950s and 1960s created a global radiocarbon (14C) signal in the environment that has provided a useful tracer and chronological marker in oceanic systems and organisms. The bomb-generated 14C signal retained in fish otoliths can be used as a permanent, time-specific recorder of the 14C present in ambient seawater, making it a useful tool in age validation of fishes. The goal of this study was to determine 14C levels in otoliths of the age-validated yelloweye rockfish (Sebastes ruberrimus) to establish a reference time series for the coastal waters of southeast Alaska. Radiocarbon values from the first year's growth of 43 yelloweye rockfish otoliths were plotted against estimated birth year to produce a 14C time series for these waters spanning 1940 to 1990. The time series shows the initial rise of bomb 14C occurred in 1958 in coastal southeast Alaskan waters and 14C levels rose relatively rapidly to peak [Delta]14C values (60-70%) between 1966 and 1971, with a subsequent declining trend through the end of the record in 1990 ( -3.2%). In addition, the radiocarbon data, independent of the radiometric study, confirms the longevity of the yelloweye rockfish up to a minimum of 44 years and strongly supports higher age estimates. The yelloweye rockfish record provides a 14C chronology that will be useful for the interpretation of 14C accreted in biological samples from these waters and in future rockfish age validation studies.
Download or read book Bomb Radiocarbon in Otoliths of Yelloweye Rockfish Sebastes Ruberrimus as a Chronometer for Age Validation of Quillback Rockfish Sebastes Maliger written by Lisa Anne Kerr and published by . This book was released on 2002 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
