Download or read book Estimation of the Number of Juvenile Chinook Salmon Oncorhynchus Tshawytscha Migrating Downstream from Blue Creek California 1989 1992 written by Joseph C. Polos and published by . This book was released on 1997 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Assessment of the Downstream Migration of Juvenile Chinook Salmon oncorhynchus Tshawytscha in the Lower Mokelumne River California written by Michelle Workman and published by . This book was released on 1999 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Estimating Juvenile Chinook Salmon Oncorhynchus Tshawytscha Abundance from Beach Seine Data Collected in the Sacramento San Joaquin Delta and San Francisco Bay California written by Russell W. Perry and published by . This book was released on 2016 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fall Chinook Oncorhynchus Tshawytscha written by Jim Waldvogel and published by . This book was released on 2006 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: Age analysis for 22 years (1980 excluded) showed that the overall percentages for female spawners was 53% (4-year olds), 38% (3-year olds), and 9% (5-year olds). The age composition of male spawners showed a high degree of variability throughout the study. Male chinook of age 2, 3 and 4 were dominant annually, but 5- and 6- year old fish were present in most spawning seasons. All chinook carcasses from which scales were collected were also measured for length (over 120 samples in 22 years). Decreases in mean length were documented for all age classes for each of the El Nino episodes that occurred during the study (1982-1984; 1992-1993; 1997-1998). The decreases in mean length appeared to carry forward for each cohort's age class. The total number of chinook redds was tabulated by counting "fresh" redds during weekly spawning surveys. The mean number of redds was 117 for the 23-year period with a mean of 0.9 redds per adult salmon or 1.8 redds per female.
Download or read book Downstream Migration of Juvenile Chinook Salmon in Horse Linto Creek Humboldt County California 1984 and 1985 written by Michael K. Harte and published by . This book was released on 1990 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recovery Plan for the Sacramento San Joaquin Delta Native Fishes written by and published by . This book was released on 1996 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Survival and Migration Dynamics of Juvenile Chinook Salmon Oncorhynchus Tshawytscha in the Sacramento San Joaquin River Delta written by Russell W. Perry and published by . This book was released on 2010 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Residence of Juvenile Chinook Salmon Oncorhynchus Tshawytscha in the Smith River Estuary California written by David Zajanc and published by . This book was released on 2003 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Passage and Survival of Juvenile Chinook Salmon Migrating from the Snake River Basin written by American Fisheries Society. Idaho Chapter and published by . This book was released on 1992* with total page 243 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Preliminary Report on Juvenile Chinook Production in the Cowichan River During 1991 and 1992 written by J. R. Candy and published by . This book was released on 1995 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Butte Creek Spring run Chinook Salmon Oncorhynchus Tshawytscha Juvenile Outmigration and Life History 1995 1998 written by Katherine A. Hill and published by . This book was released on 1999 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Downstream Migration of Juvenile Chinook Salmon Without Elevated Gill Na K ATPase Activities written by Richard D. Ewing and published by . This book was released on 1979 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Butte Creek Spring run Chinook Salmon Oncorhynchus Tshawytscha Juvenile Outmigration and Life History 1994 1998 written by Katherine A. Hill and published by . This book was released on 1999 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigations Into the Early Life history of Naturally Produced Spring Chinook Salmon and Summer Steelhead in the Grande Ronde River Basin Annual Report 2001 written by and published by . This book was released on 2003 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: We determined migration timing and abundance of juvenile spring chinook salmon Oncorhynchus tshawytscha and juvenile steelhead/rainbow trout Oncorhynchus mykiss using rotary screw traps on four streams in the Grande Ronde River basin during the 2001 migratory year (MY 2001) from 1 July 2000 through 30 June 2001. Based on migration timing and abundance, two distinct life-history strategies of juvenile spring chinook and O. mykiss could be distinguished. An 'early' migrant group left upper rearing areas from 1 July 2000 through 29 January 2001 with a peak in the fall. A 'late' migrant group descended from upper rearing areas from 30 January 2001 through 30 June 2001 with a peak in the spring. The migrant population of juvenile spring chinook salmon in the upper Grande Ronde River in MY 2001 was very low in comparison to previous migratory years. We estimated 51 juvenile spring chinook migrated out of upper rearing areas with approximately 12% of the migrant population leaving as early migrants to overwinter downstream. In the same migratory year, we estimated 16,067 O. mykiss migrants left upper rearing areas with approximately 4% of these fish descending the upper Grande Ronde River as early migrants. At the Catherine Creek trap, we estimated 21,937 juvenile spring chinook migrants in MY 2001. Of these migrants, 87% left upper rearing areas early to overwinter downstream. We also estimated 20,586 O. mykiss migrants in Catherine Creek with 44% leaving upper rearing areas early to overwinter downstream. At the Lostine River trap, we estimated 13,610 juvenile spring chinook migrated out of upper rearing areas with approximately 77% migrating early. We estimated 16,690 O. mykiss migrated out of the Lostine River with approximately 46% descending the river as early migrants. At the Minam River trap, we estimated 28,209 juvenile spring chinook migrated out of the river with 36% migrating early. During the same period, we estimated 28,113 O. mykiss with approximately 14% of these fish leaving as early migrants. Juvenile spring chinook salmon PIT-tagged at trap sites in the fall and in upper rearing areas during winter were used to compare migration timing and survival to Lower Granite Dam of the early and late migrant groups. Juvenile spring chinook tagged on the upper Grande Ronde River were detected at Lower Granite Dam from 4 May to 20 May 2001, with a median passage date of 17 May. Too few fish were collected and tagged to conduct detection rate and survival comparisons between migrant groups. PIT-tagged salmon from Catherine Creek trap were detected at Lower Granite Dam from 27 April to 13 July 2001. Early migrants were detected significantly earlier (median = 10 May) than late migrants (median = 1 June). Also, early migrants from Catherine Creek were detected at a significantly higher rate than fish tagged in upper rearing areas in the winter, suggesting better survival for fish that migrated out of upper rearing areas in the fall. Juvenile spring chinook salmon from the Lostine River were detected at Lower Granite Dam from 2 April through 4 July 2001. Early migrants were detected significantly earlier (median = 27 April) than late migrants (median = 14 May). However, there was no difference in detection rates between early and late migrants. Survival probabilities showed similar patterns as dam detection rates. Juvenile spring chinook salmon from the Minam River were detected at Lower Granite Dam from 8 April through 18 August 2001. Early migrants were detected significantly earlier (median = 28 April) than late migrants (median = 14 May). Late migrants from the Minam River were tagged at the trap in the spring. Spring chinook salmon parr PIT-tagged in summer 2000 on Catherine Creek and the Imnaha, Lostine, and Minam rivers were detected at Lower Granite Dam over an 87 d period from 8 April to 3 July 2001. The migratory period of individual populations ranged from 51 d (Imnaha River) to 67 d (Catherine Creek) in length. Median dates of migration ranged from 30 April (Imnaha River) to 17 May (Catherine Creek). Detection rates differed between populations with Catherine Creek spring chinook salmon detected at the lowest rate (8.2%). Imnaha, Lostine, and Minam detection rates were not significantly different from each other. A similar pattern was seen for survival probabilities. Using mark-and-recapture and scale-aging techniques, we determined the population size and age-structure of spring chinook salmon parr in Catherine Creek and the Lostine River during the summer of 2001. In Catherine Creek, we estimated that 986 mature age-1 parr (precocious males) and 15,032 immature age-0 parr were present during August 2001. We estimated there were 7.5 mature male parr for every anadromous female spawner in Catherine Creek in 2001. We estimated 33,086 immature, age-0 parr inhabited the Lostine River in August 2001.
Download or read book Butte and Big Chico Creeks Spring run Chinook Salmon Oncorhynchus Tshawytscha Life History Investigation 2002 2003 written by Paul D. Ward and published by . This book was released on 2004 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Preliminary Report on Juvenile Chinook Production in the Cowichan River 1995 written by and published by . This book was released on 1996 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents the findings of part of an ongoing study to assess the productivity of chinook salmon in the Cowichan River, in which researchers began monitoring the downstream migration of chinook juveniles in 1991. They also monitored the interaction between hatchery and naturally-spawned chinook juveniles. Various techniques and equipment such as minnow traps and purse seines were used on the river in 1991 and 1992 to collect information on growth, abundance, and migration timing of juvenile chinook salmon. Results presented include estimates of naturally-spawned chinook juveniles and hatchery releases.
Download or read book Estimation of Survival Rates for Chinook Salmon During Their Downstream Migration in the Green River Washington written by Jerry Alan Wetherall and published by . This book was released on 1971 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:
