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Author: Michael D. Booz
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 88
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Book Description
During 2007, wild (naturally-produced) and hatchery-reared Chinook salmon, Oncorhynchus tshawytscha, runs to the Ninilchik River were assessed with a weir to determine the stock composition of total escapements. The Ninilchik River Chinook salmon supplementation program has provided important sport fishing opportunities for the Ninilchik River and terminal saltwater fisheries. Continuation of the Chinook salmon assessment at Ninilchik River weir is recommended to ensure that adequate escapement of wild Chinook salmon is maintained.
Author: Michael D. Booz
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 88
Get Book Here
Book Description
During 2007, wild (naturally-produced) and hatchery-reared Chinook salmon, Oncorhynchus tshawytscha, runs to the Ninilchik River were assessed with a weir to determine the stock composition of total escapements. The Ninilchik River Chinook salmon supplementation program has provided important sport fishing opportunities for the Ninilchik River and terminal saltwater fisheries. Continuation of the Chinook salmon assessment at Ninilchik River weir is recommended to ensure that adequate escapement of wild Chinook salmon is maintained.
Author: Michael D. Booz
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 67
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Book Description
From 30 June through 7 August 2008, wild (naturally-produced) and hatchery-reared Chinook salmon, Oncorhynchus tshawytscha, runs to the Ninilchik River were assessed with a weir to determine the stock composition of total escapements. The Ninilchik River Chinook salmon supplementation program has provided important sport fishing opportunities for the Ninilchik River and terminal saltwater fisheries. Continuation of the Chinook salmon assessment at Ninilchik River weir is recommended to ensure that adequate escapement of wild Chinook salmon is maintained.
Author: Michael D. Booz
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 66
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Book Description
From July 3-31, 2009, wild (naturally-produced) and hatchery-reared Chinook salmon, Oncorhynchus tshawytscha, runs to the Ninilchik River were assessed with a weir to determine the stock composition of total escapements. The Ninilchik River Chinook salmon supplementation program has provided important sport fishing opportunities for the Ninilchik River and terminal saltwater fisheries. Continuation of the Chinook salmon assessment at Ninilchik River weir is recommended to ensure that adequate escapement of wild Chinook salmon is maintained.
Author: Michael D. Booz
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 91
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Book Description
During 2006, wild (naturally-produced) and hatchery-reared Chinook salmon, Oncorhynchus tshawytscha, runs to the Ninilchik River were assessed with a weir to determine the stock composition of total escapements. The Ninilchik River Chinook salmon supplementation program has provided important sport fishing opportunities for the Ninilchik River and terminal saltwater fisheries. Continuation of the Chinook salmon assessment at Ninilchik River weir is recommended to ensure that adequate escapement of wild Chinook salmon is maintained.
Author: Michael D. Booz
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 57
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Book Description
In 2010, the total number of Chinook salmon counted at the Ninilchik River weir was 658 fish, of which 623 were wild and 35 were hatchery-reared. The wild Chinook salmon escapement corresponding to the sustainable escapement goal (SEG) index monitoring period (3 July through 31 July) was 605 fish, which fell within the SEG range of 550-1,300 fish. Based on the dates of the median run times during the SEG index monitoring period, the wild Chinook salmon run was 8 days earlier than the hatchery-reared Chinook salmon run. The dominant age class was ocean age 2 for both wild and hatchery-reared Chinook salmon. No egg takes were conducted in 2010. Stocking goals were met for the Ninilchik River and all Kachemak Bay terminal saltwater fishery locations. The Ninilchik River Chinook salmon supplementation program has continued to provide sport fishing opportunities on the Ninilchik River and terminal saltwater fisheries. Continuation of Chinook salmon assessment at the Ninilchik River weir is recommended to ensure that adequate escapement of wild Chinook salmon is maintained.
Author: Holly I. Dickson
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 0
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Book Description
During 2016–2018, an instream video weir enumerated the entire run of Ninilchik River Chinook salmon with average wild and hatchery escapements of 1,121 and 895, respectively. Enumerating the entire run allowed ADF&G to establish a sustainable escapement goal (SEG) based on total escapement versus an SEG based on an index period from 3 to 31 July. The current SEG of 750–1,300 Chinook salmon was met during all 3 years of the study (2016–2018). The current average wild escapement was below the average from when the run was last fully enumerated (1999–2015), but above the average from when the run was expanded based on weir counts (2006–2015). In contrast, the current average hatchery escapement was above the average from 1999–2015. Age-sex-length compositions were assessed during broodstock collection in 2016–2018. Wild Chinook salmon were predominantly ocean age 2 or 3, whereas hatchery-reared were predominantly ocean age 1 or 2. On average, wild Chinook salmon were larger than their hatchery-reared components of the same sex and age class. The sex composition of the wild Chinook salmon run ranged from 18% to 61% female, whereas the hatchery-reared sex composition ranged from 27% to 42% female. Approximately 150,000 age-0 smolt were stocked annually upstream of the weir (RKM 25.8) during 2016–2018, continuing the supplementation of the Ninilchik River with hatchery-reared Chinook salmon. The stocking occurred during the third week in May in 2016 and 2018. In 2017, smolt were stocked in early May at RKM 7.7. The broodstock collection goal to restock the Ninilchik River was met in all years. In 2017, instead of using Ninilchik River broodstock to stock Kachemak Bay terminal fisheries, broodstocks from other Cook Inlet locations were used. In 2018, extra Ninilchik River broodstock was collected to make up for regional broodstock shortfalls. Stocking in Halibut Cove Lagoon was discontinued after 2017 in favor of increased stocking at Nick Dudiak Fishing Lagoon where adaptive stocking methods were used in all years to avoid mortality associated with Chaetoceros spp. diatoms.
Author: Carol M. Kerkvliet
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 74
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Book Description
During 2005, wild (naturally-produced) and hatchery-reared Chinook salmon, Oncorhynchus tshawytscha, runs to the Ninilchik River were assessed with a weir to determine the stock composition of total escapements. The Ninilchik River Chinook salmon supplementation program has provided important sport fishing opportunities on the Ninilchik River and terminal fisheries. Continuation of the Chinook salmon assessment at Ninilchik River weir is recommended to insure that adequate escapement of wild Chinook salmon is maintained.
Author: Michael D. Booz
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 153
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Book Description
The Ninilchik River contains both wild and hatchery-reared runs of Chinook salmon. In 2011-2015, the wild Chinook salmon escapements corresponding to the sustainable escapement goal (SEG) index monitoring period (3-31 July) fell within the SEG range of 550-1,300 fish every year. Above-average runs of hatchery-reared Chinook salmon occurred in 2014 and 2015. Based on the median run-timing date during the SEG index monitoring period, the 2011-2015 wild and hatchery-reared Chinook salmon runs to the weir had variable run timing between years and between one another. During each year from 2011 through 2015, the predominant age class for the wild run to the weir was ocean age 2 or 3, and the predominant age class for hatchery-reared fish was ocean age 1. Although Ninilchik River egg-take goals were not achieved in 2012-2015, stocking goals were met in all years for the Ninilchik River and all Kachemak Bay terminal saltwater fishery locations with additional contributions from broodstock collections at Crooked and Ship Creeks. Starting in 2012, all smolt were reared in the William Jack Hernandez Sport Fish Hatchery in Anchorage and stocked at age 0. In 2015, the Ninilchik River stocking goal was increased to 150,000 smolt annually to provide more inriver sport fishing opportunity and better support broodstock collection. Adaptive stocking methods were used at the Nick Dudiak Fishing Lagoon on the Homer Spit to avoid mortality associated with the diatom Chaetoceros spp.
Author: Holly I. Dickson
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 0
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Book Description
This report amends ROP.SF.2A.2020.04 by extending its primary objectives for an additional year. This project has 2 main goals: 1) assess the status of the Ninilchik River Chinook salmon (Oncorhynchus tshawytscha) stock, and 2) collect Chinook salmon broodstock for supplementation of the Ninilchik River and stocking of terminal saltwater fishery locations in Kachemak Bay. After the escapement goal is reviewed in 2023, Chinook salmon escapement monitoring will transition from the broodstock collection weir at RKM 7.7 to the weir at RKM 4.1. The downstream monitoring location provides full enumeration of wild and hatchery-reared escapements. After paired counts at both weir locations are made, the current SEG, associated with the upper weir, will be updated with reference to the lower weir. The resulting lower-weir goal will better reflect the whole escapement in the Ninilchik River. The complete enumeration of the hatchery-reared run and age sampling will also provide estimates of survival rates of hatchery broods and will provide harvest rates in years when the fishery prohibits retention of wild Chinook salmon. These estimates will help clarify the contribution that hatchery-reared Chinook salmon make to the Ninilchik River sport fishery.
Author: Carol M. Kerkvliet
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 44
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Book Description
During 2004, wild (naturally-produced) and hatchery-reared Chinook salmon, Oncorhynchus tshawytscha, runs to the Ninilchik River were assessed with a weir to determine the stock composition of total escapements. This report examines the results of this study.
