West Cook Inlet (Theodore and Lewis Rivers Chinook and Coho Salmon Escapement Studies, 2012-2014 PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download West Cook Inlet (Theodore and Lewis Rivers Chinook and Coho Salmon Escapement Studies, 2012-2014 PDF full book. Access full book title West Cook Inlet (Theodore and Lewis Rivers Chinook and Coho Salmon Escapement Studies, 2012-2014 by Nick Logelin. Download full books in PDF and EPUB format.
Author: Nick Logelin
Publisher:
ISBN:
Category : Escapement (Fisheries)
Languages : en
Pages : 36
Get Book Here
Book Description
In 2011, the Alaska Board of Fisheries (BOF) designated Chinook salmon (Oncorhynchus tshawytscha) in the Northern District of Cook Inlet, which includes the Theodore and Lewis rivers, to be a stock of yield concern. The purpose of this project was to determine whether the current escapement survey method of a single aerial survey, conducted annually during peak Chinook salmon spawning, provides a reliable index to manage these fisheries. From 2012 to 2014, resistance board weirs were installed on the Theodore and Lewis rivers to monitor Chinook salmon escapement for comparison to the aerial index survey. Weir operation was extended through the fall to enumerate coho salmon (O. kisutch) for the 2013 and 2014 runs. Because weirs on the Theodore and Lewis rivers had numerous inoperable periods when missed passage could not be estimated for 2013 (Lewis River) and 2014 (Lewis and Theodore rivers), reliable escapement estimates could not be made for these years. The only year when a comparison between the weir count and the aerial index survey could be made for the Lewis River was 2012. Of the 58 Chinook salmon that passed the Lewis River weir in 2012, 28 (48%) were counted above the weir by aerial survey. For the Theodore River, 129 (22%) and 434 (69%) of the 577 and 630 Chinook salmon that passed the weir were accounted for in the aerial surveys in 2012 and 2013, respectively. On the Theodore River in 2013, a total of 1,560 coho salmon passed the weir between 20 July and 31 August. On the Lewis River in 2013, a total of 413 coho salmon passed the weir between 30 July and 31 August. Coho salmon counts on the Theodore and Lewis rivers in 2014 were incomplete due to several periods when the weirs were inoperable because of high water.
Author: Nick Logelin
Publisher:
ISBN:
Category : Escapement (Fisheries)
Languages : en
Pages : 36
Get Book Here
Book Description
In 2011, the Alaska Board of Fisheries (BOF) designated Chinook salmon (Oncorhynchus tshawytscha) in the Northern District of Cook Inlet, which includes the Theodore and Lewis rivers, to be a stock of yield concern. The purpose of this project was to determine whether the current escapement survey method of a single aerial survey, conducted annually during peak Chinook salmon spawning, provides a reliable index to manage these fisheries. From 2012 to 2014, resistance board weirs were installed on the Theodore and Lewis rivers to monitor Chinook salmon escapement for comparison to the aerial index survey. Weir operation was extended through the fall to enumerate coho salmon (O. kisutch) for the 2013 and 2014 runs. Because weirs on the Theodore and Lewis rivers had numerous inoperable periods when missed passage could not be estimated for 2013 (Lewis River) and 2014 (Lewis and Theodore rivers), reliable escapement estimates could not be made for these years. The only year when a comparison between the weir count and the aerial index survey could be made for the Lewis River was 2012. Of the 58 Chinook salmon that passed the Lewis River weir in 2012, 28 (48%) were counted above the weir by aerial survey. For the Theodore River, 129 (22%) and 434 (69%) of the 577 and 630 Chinook salmon that passed the weir were accounted for in the aerial surveys in 2012 and 2013, respectively. On the Theodore River in 2013, a total of 1,560 coho salmon passed the weir between 20 July and 31 August. On the Lewis River in 2013, a total of 413 coho salmon passed the weir between 30 July and 31 August. Coho salmon counts on the Theodore and Lewis rivers in 2014 were incomplete due to several periods when the weirs were inoperable because of high water.
Author: Daryl Lescanec
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 35
Get Book Here
Book Description
Chinook salmon (Oncorhynchus tshawytscha) and coho salmon (O. kisutch) annual escapements to the Deshka River were assessed from 2005 to 2014 to provide escapement counts and stock-specific biological information. Both Chinook and coho salmon were counted at a weir operated from approximately late May through mid-September each year, except for 2006 when coho salmon were counted through 16 August. The mean annual Chinook salmon weir count was 19,366 fish. Age composition for Chinook salmon averaged 30.8% age-1.2 fish, 50.4 % age-1.3 fish, and 16.7% age-1.4 fish. On average, females composed 48.3% of the runs. Chinook salmon run timing was consistent until 2013 and then quite variable in the last 2 years. On average, 50% (SE 8.1%) of the fish passed upstream of the weir by 20 June. Chinook salmon escapement goals were met for the years 2005-2007 and 2010-2014. The 2005-2014 mean annual coho salmon weir count was 18,684 fish. Above average coho salmon runs were observed in 2005 and 2006, whereas 2012 was the lowest count recorded since the weir was first operated in 1995. High water and a flood precluded complete coho salmon weir counts 2 of the 10 years. Coho salmon run timing was inconsistent (SD = 8 days at mean 50th percentile).
Author: Daryl Lescanec
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 41
Get Book Here
Book Description
Chinook salmon (Oncorhynchus tshawytscha) and coho salmon (O. kisutch) annual escapements to the Little Susitna River were assessed from 2012 to 2016 to provide escapement counts and stock-specific biological information. Both Chinook and coho salmon were counted at a weir operated from approximately late May through mid-September each year. Not all counts were complete for each run. Complete weir counts for Chinook salmon from 2014 through 2016 ranged between 3,135 and 5,026 fish. For 2013-2016, age composition for Chinook salmon averaged 38.1% age-1.2 fish, 37.1% age-1.3 fish, and 13.6% age-1.4 fish. On average, females composed 35.5% of the runs. The midpoint of the Chinook salmon runs with complete counts varied between years from 11 to 23 June. Chinook salmon escapement goals were met for the years 2013-2016. The 2012, 2014, and 2016 mean annual coho salmon weir count was 13,680 fish. An above-average coho salmon run was observed in 2014, whereas 2012 was the lowest count recorded since the weir was first operated in 1995. High water and a flood precluded complete coho salmon weir counts 2 of the 5 years. The midpoint of the coho salmon runs varied between years with complete counts from 10 to 21 August.
Author: International Union for the Conservation of Nature and Natural Resources (IUCN). Global Marine and Polar Programme.
Publisher: IUCN
ISBN: 283171723X
Category : Nature
Languages : en
Pages : 140
Get Book Here
Book Description
Following the first international workshop on the economics of ocean acidification organized by the Centre Scientifique de Monaco and the International Atomic Energy Agency in 2010, a second international workshop was held in November 2012, which explored the level of risk, and the resilience or vulnerability of defined regions of the world ocean in terms of fishery and aquaculture species and economic impacts, and social adaptation. This report includes the findings and recommendations of the respective regional working groups and is the result of an interdisciplinary survey of ocean acidification-sensitive fisheries and aquaculture.
Author: Alaska Geographic Society
Publisher: Graphic Arts Books
ISBN: 0882401335
Category : History
Languages : en
Pages : 93
Get Book Here
Book Description
Alaska Geographic is an award-winning series that presents the people, places, and wonders of Alaska to the world. Over the past 30 years, Alaska Geographic has earned its reputation as the publication for those who love Alaska. The series boasts more than 100 books to date, featuring communities from Barrow to Ketchikan, animals from bears to dinosaurs, history from the Russian explorers to today, and natural phenomena from the aurora to glaciers. Written by leading experts in their fields, these books are illustrated throughout with world-class photography and include colorful maps for reference.
Author: James H. Tidwell
Publisher: John Wiley & Sons
ISBN: 0813801265
Category : Technology & Engineering
Languages : en
Pages : 438
Get Book Here
Book Description
Aquaculture is an increasingly diverse industry with an ever-growing number of species cultured and production systems available to professionals. A basic understanding of production systems is vital to the successful practice of aquaculture. Published with the World Aquaculture Society, Aquaculture Production Systems captures the huge diversity of production systems used in the production of shellfish and finfish in one concise volume that allows the reader to better understand how aquaculture depends upon and interacts with its environment. The systems examined range from low input methods to super-intensive systems. Divided into five sections that each focus on a distinct family of systems, Aquaculture Production Systems serves as an excellent text to those just being introduced to aquaculture as well as being a valuable reference to well-established professionals seeking information on production methods.
Author: Jim Lichatowich
Publisher:
ISBN:
Category : History
Languages : en
Pages : 346
Get Book Here
Book Description
"Fundamentally, the salmon's decline has been the consequence of a vision based on flawed assumptions and unchallenged myths.... We assumed we could control the biological productivity of salmon and 'improve' upon natural processes that we didn't even try to understand. We assumed we could have salmon without rivers." --from the introduction From a mountain top where an eagle carries a salmon carcass to feed its young to the distant oceanic waters of the California current and the Alaskan Gyre, salmon have penetrated the Northwest to an extent unmatched by any other animal. Since the turn of the twentieth century, the natural productivity of salmon in Oregon, Washington, California, and Idaho has declined by eighty percent. The decline of Pacific salmon to the brink of extinction is a clear sign of serious problems in the region. In Salmon Without Rivers, fisheries biologist Jim Lichatowich offers an eye-opening look at the roots and evolution of the salmon crisis in the Pacific Northwest. He describes the multitude of factors over the past century and a half that have led to the salmon's decline, and examines in depth the abject failure of restoration efforts that have focused almost exclusively on hatcheries to return salmon stocks to healthy levels without addressing the underlying causes of the decline. The book: describes the evolutionary history of the salmon along with the geologic history of the Pacific Northwest over the past 40 million years considers the indigenous cultures of the region, and the emergence of salmon-based economies that survived for thousands of years examines the rapid transformation of the region following the arrival of Europeans presents the history of efforts to protect and restore the salmon offers a critical assessment of why restoration efforts have failed Throughout, Lichatowich argues that the dominant worldview of our society -- a worldview that denies connections between humans and the natural world -- has created the conflict and controversy that characterize the recent history of salmon; unless that worldview is challenged and changed, there is little hope for recovery. Salmon Without Rivers exposes the myths that have guided recent human-salmon interactions. It clearly explains the difficult choices facing the citizens of the region, and provides unique insight into one of the most tragic chapters in our nation's environmental history.
Author: Erin McKittrick
Publisher: The Mountaineers Books
ISBN: 1594853924
Category : Biography & Autobiography
Languages : en
Pages : 224
Get Book Here
Book Description
CLICK HERE to download the first chapter from A Long Treak Home * Compelling adventure with an environmental focus * An informative natural and cultural history of one of our last wild coastlines * Author is a pioneer in "packrafting," an emerging trend in backcountry travel In June 2007, Erin McKittrick and her husband, Hig, embarked on a 4,000-mile expedition from Seattle to the Aleutian Islands, traveling solely by human power. This is the story of their unprecedented trek along the northwestern edge of the Pacific Ocean-a year-long journey through some of the most rugged terrain in the world- and their encounters with rain, wind, blizzards, bears, and their own emotional and spiritual demons. Erin and Hig set out from Seattle with a desire to raise awareness of natural resource and conservation issues along their route: clear-cut logging of rainforests; declining wild salmon populations; extraction of mineral resources; and effects of global climate change. By taking each mile step by step, they were able to intimately explore the coastal regions of Washington, British Columbia, and Alaska, see the wilderness in its larger context, and provide a unique on-the-ground perspective. An entertaining and, at times, thrilling adventure, theirs is a journey of discovery and of insights about the tiny communities that dot this wild coast, as well as the individuals there whom they meet and inspire.
Author: United States. Congress. Senate. Committee on Commerce, Science, and Transportation. Subcommittee on Oceans, Atmosphere, Fisheries, and Coast Guard
Publisher:
ISBN:
Category : Genetic engineering
Languages : en
Pages : 98
Get Book Here
Book Description
Author: Kevin L. Kapuscinski
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 716
Get Book Here
Book Description
