Download or read book Spatial and Temporal Distribution and Relative Abundance of Pacific Cod Gadus Macrocephalus Larvae in the Western Gulf of Alaska written by William C. Rugen and published by . This book was released on 1988 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spatial and Temporal Distribution of Larval Fish in the Western Gulf of Alaska written by William C. Rugen and published by . This book was released on 1990 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spatial and Temporal Distribution of Larval Fish in the Western Gulf of Alaska with Emphasis on the Period of Peak Abundance of Walleye Pollock Ther written by Alaska Fisheries Science Center Nationa and published by BiblioGov. This book was released on 2013-06 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the 1970's the National Oceanic and Atmospheric Administration (NOAA) was made to manage our oceanic and atmospheric resources. The Alaska Fisheries Science Center is the research branch for marine life and coastal oceans off parts of the U.S. west coast and Alaska. This includes the Eastern Bering Sea where some the worlds most important commercial fishing takes place. Their mission is to develop and maintain scientific exploration to help understand and manage that region's environment. Over the years there have been many reports published which discuss their findings; this is one of them.
Download or read book NOAA Technical Report NMFS written by and published by . This book was released on 1984 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laboratory Guide to Early Life History Stages of Northeast Pacific Fishes written by Ann C. Matarese and published by . This book was released on 1989 with total page 678 pages. Available in PDF, EPUB and Kindle. Book excerpt: This laboratory guide presents taxonomic information on eggs and larvae of fishes of the Northeast Pacific Ocean (north of California) and the eastern Bering Sea. Included are early-life-history series, illustrations, and comparative descriptions of 232 species expected to spawn here, out of a total 627 species known to occur in marine wasters of this area. Meristic and general life-history data are included, as well as diagnostic characters to help identify eggs and larvae. Most of this information has been gleaned from literature, with the addition of 200 previously unpublished illustrations.
Download or read book Feeding Ecology of Larval and Juvenile Walleye Pollock Theragra Chalcogramma and Pacific Cod Gadus Macrocephalus in the Southeastern Bering Sea written by Wesley Wayne Strasburger and published by . This book was released on 2012 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: Poor recruitment success during warm years (e.g., 2001-2005) was hypothesized to lead to reduced gadid recruitment in the southeastern Bering Sea. These groundfishes are of particular importance, both commercially and ecologically in the southeastern Bering Sea. The spatial and temporal overlap of early life stages of walleye pollock and Pacific cod may explain their strongly correlated recruitment trends in the southeastern Bering Sea. The goal of this study was to compare feeding patterns of larval and juvenile walleye pollock (Theragra chalcogramma) and Pacific cod (Gadus macrocephalus) in the southeastern Bering Sea, and to assess the possibility of prey resource competition. Larvae and juveniles from both species collected between May and September 2008, an exceptionally cold year, were used to analyze stomach contents. Fish body size was most consistently related to diet composition within species, however, spatial and depth factors also had an influence. Feeding success and diet composition of these two gadid species were consistently different throughout the spring, summer, and especially fall seasons. Pacific cod larvae and juveniles consistently consumed larger prey items in every season and progressively fewer prey items, especially in the fall. This data suggests that competition for prey resources was unlikely during cold 2008.
Download or read book Distribution and Abundance Patterns of Eggs and Larvae of Walleye Pollock Theragra Chalcogramma in the Western Gulf of Alaska written by Jean R. Dunn and published by . This book was released on 1984 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spatial and Temporal Patterns in the Gulf of Alaska Groundfish Community in Relation to the Environment written by Franz-Josef Mueter and published by . This book was released on 1999 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The GoA supports a rich demersal of fish community dominated by gadids, pleuronectids, sablefish (Anoplopoma fimbria) and rockfishes (Sebastes spp.). This study describes the structure of the juvenile and adult groundfish communities of the Gulf of Alaska (GoA) in relation to their environment and along spatial and temporal gradients. Abundance data were obtained from trawl surveys of juvenile groundfishes in the nearshore areas of Kodiak Island (1991-1996), shrimp-trawl surveys in the same areas (1976-1995), and triennial bottom trawl surveys of adult groundfishes on the GoA shelf and upper slope (1984-1996). Species richness, species diversity, total abundance, and multivariate indices of species composition for each station sampled were statistically related to depth, temperature, salinity, sediment composition, geographic location, and time of sampling to identify spatial and temporal patterns in community structure. The observed patterns were then related to local and large-scale atmospheric and oceanographic trends. Both juvenile and adult groundfish communities were primarily structured along the depth gradient. The abundance of juvenile groundfishes decreased with depth from 0 to 100m, whereas the abundance of adults increased with depth to a peak at 150-200m. Species richness and diversity of the adult community had a significant peak at 200-300m. Spatial patterns suggested higher abundance, lower species richness and diversity, and different species composition of demersal fishes in the western GoA compared to the eastern GoA. These large-scale spatial patterns appear to be related to differences in upwelling between the eastern and western GoA. A 40% increase in total groundfish biomass on the GoA shelf and upper slope was estimated between 1984 and 1996. Significant changes in species composition occurred in the nearshore areas of Kodiak Island in the early 1980s, from a community dominated by shrimp and small forage fishes to one dominated by large piscivorous gadids and flatfishes. The change in species composition in the nearshore community appeared to be linked to an increase in advection in the Alaska Current. Increased flow around the GoA may enhance the supply of nutrients and plankton on the shelf and upper slope, resulting in an increase in overall productivity of the pelagic and demersal biota"--Leaves iii-iv.
Download or read book Fishery Management Plan for the South Alaska Peninsula Area State waters Pacific Cod Season 2023 written by Cassandra J. Whiteside and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document provides an overview of regulations effective for the 2023 South Alaska Peninsula Area state-waters Pacific cod Gadus macrocephalus season. The 2023 South Alaska Peninsula Area state-waters Pacific cod season for pot gear is scheduled to open 7 days after closure of the Western Gulf of Alaska (WGOA) federal/parallel Pacific cod pot sector A season or March 7, whichever is later. The 2023 South Alaska Peninsula Area state-waters Pacific cod season for jig gear is scheduled to open 48 hours after closure of the WGOA federal/parallel Pacific cod jig gear sector A season; however, if the WGOA jig gear sector has not closed by March 15, the state-waters jig gear season may open, based on an assessment of effort, harvest rate, and remaining federal jig quota. Vessels participating in the state-waters Pacific cod season may not exceed 58 feet in length, and legal gear is limited to pot, mechanical jigging machine, and hand troll gear. No more than 60 groundfish pots or 5 mechanical jigging machines may be operated from a vessel. The 2023 South Alaska Peninsula Area state-waters season Pacific cod guideline harvest level (GHL) is 4,936,540 pounds. Pot gear vessels are allocated 85% of the total GHL (4,196,059 pounds); jig gear vessels are allocated 15% of the total GHL (740,481 pounds).
Download or read book Fishery Management Plan for the South Alaska Peninsula Area State waters Pacific Cod Season 2022 written by Cassandra J. Whiteside and published by . This book was released on 2021 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document provides an overview of regulations effective for the 2022 South Alaska Peninsula Area state-waters Pacific cod Gadus macrocephalus season. The 2022 South Alaska Peninsula Area state-waters Pacific cod season for pot gear is scheduled to open 7 days after closure of the Western Gulf of Alaska (WGOA) federal/parallel Pacific cod pot sector A season or March 7, whichever is later. The 2022 South Alaska Peninsula Area state-waters Pacific cod season for jig gear is scheduled to open 48 hours after closure of the WGOA federal/parallel Pacific cod jig gear sector A season; however, if the WGOA jig gear sector has not closed by March 15, the state-waters jig gear season may open, based on an assessment of effort, harvest rate, and remaining federal jig quota. Vessels participating in the state-waters Pacific cod season may not exceed 58 feet in length, and legal gear is limited to pot, mechanical jigging machine, and hand troll gear. No more than 60 groundfish pots or 5 mechanical jigging machines may be operated from a vessel. The 2022 South Alaska Peninsula Area state-waters season Pacific cod guideline harvest level (GHL) is 6,575,440 pounds. Pot gear vessels are allocated 85% of the total GHL (5,589,124 pounds); jig gear vessels are allocated 15% of the total GHL (986,316 pounds). Due to health concerns related to COVID-19, vessel operators are encouraged to complete registration forms by contacting the Kodiak ADF&G office by phone, mail, email, or fax; however, all fishery related documents are also available in-person at the ADF&G office in Kodiak.
Download or read book Age Determination of Alaska Pacific Cod Gadus Macrocephalus written by Nancy Elizabeth Roberson and published by . This book was released on 2001 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Seasonal Distribution and Relative Abundance of Marine Mammals in the Gulf of Alaska written by Lewis D. Consiglieri and published by . This book was released on 1982 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fishery Management Plan for the South Alaska Peninsula Area State waters Pacific Cod Season 2021 written by Kayla Bevaart and published by . This book was released on 2020 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document provides an overview of regulations effective for the 2021 South Alaska Peninsula Area state-waters Pacific cod Gadus macrocephalus season. The 2021 South Alaska Peninsula Area state-waters Pacific cod season for pot gear is scheduled to open 7 days after closure of the Western Gulf of Alaska (WGOA) federal/parallel Pacific cod pot sector A season or March 7, whichever is later. The 2021 South Alaska Peninsula Area state-waters Pacific cod season for jig gear is scheduled to open 48 hours after closure of the WGOA federal/parallel Pacific cod jig gear sector A season; however, if the WGOA jig gear sector has not closed by March 15, the state-waters jig gear season may open, based on assessment of effort, harvest rate, and remaining federal jig quota. Vessels participating in the state-waters Pacific cod season may not exceed 58 feet in length, and legal gear is limited to pot, mechanical jigging machine, and hand troll gear. No more than 60 groundfish pots or 5 mechanical jigging machines may be operated from a vessel. The 2021 South Alaska Peninsula Area state-waters season Pacific cod guideline harvest level (GHL) is 5,281,781 pounds. Pot gear vessels are allocated 85% of the total GHL (4,489,514 pounds); jig gear vessels are allocated 15% of the total GHL (792,267 pounds). Due to health concerns related to COVID-19, vessel operators are encouraged to complete registration forms by contacting the Kodiak ADF&G office by phone, mail, email, or fax, however all fishery related documents are also available in-person at the ADF&G office in Kodiak.
Download or read book Fishery Management Plan for the South Alaska Peninsula Area State waters Pacific Cod Season 2016 written by Nathaniel W. Nichols and published by . This book was released on 2015 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document provides an overview of regulations effective for the 2016 South Alaska Peninsula Area state-waters Pacific cod Gadus macrocephalus season. The 2016 South Alaska Peninsula Area state-waters Pacific cod season for pot gear is scheduled to open 7 days after closure of the Western Gulf of Alaska (WGOA) federal/parallel Pacific cod pot sector A season or March 7, whichever is later. The 2016 South Alaska Peninsula Area state-waters Pacific cod season for jig gear is scheduled to open 48 hours after closure of the WGOA federal/parallel Pacific cod jig gear sector A season; however, if the WGOA jig gear sector has not closed by March 15, the state-waters jig gear season may open pending assessment of effort, harvest rate, and remaining federal jig quota. Vessels participating in the state-waters or parallel Pacific cod seasons may not exceed 58 feet in length, and legal gear is limited to pot, mechanical jigging machine, and hand troll gear. No more than 60 groundfish pots or 5 mechanical jigging machines may be operated from a vessel. The 2016 South Alaska Peninsula Area state-waters season Pacific cod guideline harvest level (GHL) is 26,788,149 pounds. Pot vessels are allocated 85% of the total GHL, or 22,769,927 pounds, and jig vessels are allocated 15% of the total GHL, or 4,018,222 pounds.
Download or read book Results of the Acoustic Trawl Survey of Walleye Pollock Gadus Chalcogrammus in the Western Central Gulf of Alaska June August 2011 DY2011 03 written by Darin Jones and published by . This book was released on 2015 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientists from the Midwater Assessment and Conservation Engineering (MACE) Program of the Alaska Fisheries Science Center's (AFSC) Resource Assessment and Conservation Engineering (RACE) Division conducted an acoustic-trawl (AT) stock assessment survey of the western Gulf of Alaska (GOA) shelf to estimate the distribution and abundance of walleye pollock (Gadus chalcogrammus) in summer 2011. Previous partial surveys of the GOA were also conducted during the summers of 2003 and 2005 by MACE. The 2011 survey covered the shelf from the Islands of Four Mountains to the Chiniak Trough east of Kodiak Island including many associated bays and troughs. The biomass estimate for the entire survey area was 452,950 t. The majority of the adult pollock observed was located on the continental shelf (45%), Shelikof Strait (35%), and east of Kodiak Island in Chiniak (8%) and Barnabas Troughs (7%). Large numbers of age-1 walleye pollock (26% of Shelikof pollock biomass) were mixed with older fish in Shelikof Strait. Fish weight at length was similar to surveys conducted in the summer GOA in previous years. Backscatter was attributed to other species where possible. Biomass estimates were also calculated for capelin (Mallotus villosus, 27,920 t) and Pacific ocean perch (Sebastes alutus, 303,360 t), and relative abundance and distribution was estimated for euphausiids (primarily consisting of Thysanoessa inermis, but also including T. spinifera, T. raschii, and Euphausia pacifica).
Download or read book The Spatial and Temporal Distribution of Fish Eggs and Larvae in Hempstead Bay Estuary written by Joseph Adelard Lessard and published by . This book was released on 1979 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pacific Cod gadus Macrocephalus in Puget Sound and Adjacent Waters written by Wayne A. Palsson and published by . This book was released on 1990 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt:
