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  • 1
    Online Resource
    Online Resource
    Canadian Science Publishing ; 2011
    In:  Canadian Journal of Fisheries and Aquatic Sciences Vol. 68, No. 12 ( 2011-12), p. 2194-2203
    In: Canadian Journal of Fisheries and Aquatic Sciences, Canadian Science Publishing, Vol. 68, No. 12 ( 2011-12), p. 2194-2203
    Abstract: Pacific lamprey, Lampetra tridentata , has declined precipitously throughout their range in the Columbia River basin of North America. Tribal Nations and Federal and State agencies are engaged in efforts to restore these fish. Understanding whether Pacific lamprey emit and detect migratory pheromones is particularly important for these restoration efforts. Using behavioural assays, we demonstrated that migratory adult Pacific lamprey are attracted to odors emanating from their larval conspecifics. We then identified putative pheromones released by larval Pacific lamprey. Chemical analysis of the conditioned water from larval lamprey using liquid chromatography – mass spectrometry (LC–MS) revealed that the Pacific lamprey can release petromyzonamine disulfate (PADS), petromyzosterol disulfate (PSDS), and petromyzonol sulfate (PZS). Electro-olfactogram studies further demonstrated that adult Pacific lamprey can smell those bile acid compounds. Our data strongly indicate that the Pacific lamprey employ a chemical communication system mediated by a mixture of bile acids, as evidenced by pheromonal functions of the bile acid compounds in guiding migratory adult sea lamprey to the spawning streams. Comprehensive understanding of the chemical communications involved in lamprey migratory behavior may lead to improved scientific approaches for restoration efforts.
    Type of Medium: Online Resource
    ISSN: 0706-652X , 1205-7533
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 2011
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    detail.hit.zdb_id: 1473089-3
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  • 2
    In: Transactions of the American Fisheries Society, Wiley, Vol. 146, No. 1 ( 2017-01), p. 60-73
    Abstract: Homing and straying in salmon have been extensively studied, yet it has proven difficult to disentangle the biotic and abiotic factors that influence straying. In the Columbia River basin, some juvenile salmon are collected at dams and transported downstream to increase survival during seaward migration, and as returning adults they experience a range of environmental conditions as they ascend the river. We examined 8 years of PIT tag detection data for hatchery‐reared, fall‐run Chinook Salmon Oncorhynchus tshawytscha released in the Snake River to evaluate the combined effects of juvenile barging, rearing and release locations, and environmental conditions on adult migration speed and straying below and above the Columbia River–Snake River confluence. Straying to the upper Columbia River was 10–19 times more likely among adults that were barged as juveniles from Snake River dams than among adults that were in‐river migrants or that were transported from McNary Dam (below the confluence) as juveniles. Similarly, barging from Snake River dams and warmer Columbia River temperatures increased the likelihood of straying into streams below the confluence. Furthermore, adult upstream migration was slower among juveniles that were reared at two mid‐Columbia River hatcheries and juveniles that were barged, indicating possible navigational impairment. However, rearing location, release distance, and release age had relatively minimal effects on straying. Collectively, our results indicate that (1) adult migration and homing are affected by a complex combination of processes that take place during smolt out‐migration and the adult return migration, and (2) enhancement efforts can inadvertently add to the challenge. The straying of barged fish demonstrates the potential for increasing adult returns to the Snake River by changing the barging process so that it more adequately supports the proper imprinting of juveniles. Received May 13, 2016; accepted September 7, 2016 Published online December 2, 2016
    Type of Medium: Online Resource
    ISSN: 0002-8487 , 1548-8659
    Language: English
    Publisher: Wiley
    Publication Date: 2017
    detail.hit.zdb_id: 2192460-0
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    SSG: 21,3
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  • 3
    Online Resource
    Online Resource
    Wiley ; 2000
    In:  Transactions of the American Fisheries Society Vol. 129, No. 5 ( 2000-09), p. 1082-1095
    In: Transactions of the American Fisheries Society, Wiley, Vol. 129, No. 5 ( 2000-09), p. 1082-1095
    Type of Medium: Online Resource
    ISSN: 0002-8487 , 1548-8659
    Language: English
    Publisher: Wiley
    Publication Date: 2000
    detail.hit.zdb_id: 2192460-0
    SSG: 12
    SSG: 21,3
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  • 4
    In: Ecology, Wiley, Vol. 96, No. 10 ( 2015-10), p. 2823-2833
    Type of Medium: Online Resource
    ISSN: 0012-9658
    RVK:
    Language: English
    Publisher: Wiley
    Publication Date: 2015
    detail.hit.zdb_id: 1797-8
    detail.hit.zdb_id: 2010140-5
    SSG: 12
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  • 5
    In: Environmental Biology of Fishes, Springer Science and Business Media LLC, Vol. 95, No. 3 ( 2012-11), p. 301-307
    Type of Medium: Online Resource
    ISSN: 0378-1909 , 1573-5133
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2012
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    detail.hit.zdb_id: 1497685-7
    SSG: 21,3
    SSG: 12
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  • 6
    Online Resource
    Online Resource
    Oxford University Press (OUP) ; 2024
    In:  Integrative And Comparative Biology ( 2024-02-19)
    In: Integrative And Comparative Biology, Oxford University Press (OUP), ( 2024-02-19)
    Abstract: Pacific salmon (Oncorhynchus spp.) hatch and feed in freshwater habitats, migrate to sea to mature, and return to spawn at natal sites. The final, riverine stages of the return migrations are mediated by chemical properties of the natal stream that they learned as juveniles. Like some other fishes, salmon growth is asymptotic; they grow continuously throughout life toward a maximum size. The continued growth of the nervous system may be plastic in response to environmental variables. Due to the ecological, cultural, and economic importance of Pacific salmon, individuals are often reared in hatcheries and released into the wild as juveniles to supplement natural populations. However, hatchery-reared individuals display lower survivorship and may also stray (i.e., spawn in a non-natal stream) at higher rates than their wild counterparts. Hatchery environments may lack stimuli needed to promote normal development of the nervous system, thus leading to behavioral deficits and a higher incidence of straying. This study compared the peripheral olfactory system and brain organization of hatchery-reared and wild-origin sockeye salmon fry (O. nerka). Surface area of the olfactory rosette, diameter of the olfactory nerve, total brain size, and size of major brain regions were measured from histological sections and compared between wild and hatchery-origin individuals. Hatchery-origin fish had significantly larger optic tecta, and marginally insignificant, yet noteworthy trends, existed in the valvula cerebelli (hatchery  & gt; wild) and olfactory bulbs (hatchery  & lt; wild). We also found a putative difference in olfactory nerve diameter (dmin) (hatchery  & gt; wild), but the validity of this finding needs further analyses with higher resolution methods Overall, these results provide insight into the potential effects of hatchery rearing on nervous system development in salmonids, and may explain behavioral deficits displayed by hatchery-origin individuals post-release.
    Type of Medium: Online Resource
    ISSN: 1540-7063 , 1557-7023
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2024
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  • 7
    Online Resource
    Online Resource
    The Company of Biologists ; 2020
    In:  Journal of Experimental Biology
    In: Journal of Experimental Biology, The Company of Biologists
    Abstract: The use of “map-like” information from Earth's magnetic field for orientation has been shown in diverse taxa, but questions remain regarding the function of such maps. We used a “magnetic displacement” experiment to demonstrate that juvenile pink salmon (Oncorhynchus gorbuscha) use magnetic cues to orient. The experiment was designed to simultaneously explore whether their magnetic map is used to direct fish (i) homeward, (ii) toward the center of their broad oceanic range, or (iii) along their oceanic migratory route. The headings adopted by these navigationally naïve fish coincided remarkably well with the direction of the juveniles’ migration inferred from historical tagging and catch data. This suggests that the large-scale movements of pink salmon across the North Pacific may be driven largely by their innate use of geomagnetic map cues. Key aspects of the oceanic ecology of pink salmon and other marine migrants might therefore be predicted from magnetic displacement experiments.
    Type of Medium: Online Resource
    ISSN: 1477-9145 , 0022-0949
    Language: English
    Publisher: The Company of Biologists
    Publication Date: 2020
    detail.hit.zdb_id: 1482461-9
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  • 8
    Online Resource
    Online Resource
    Canadian Science Publishing ; 1998
    In:  Canadian Journal of Zoology Vol. 76, No. 3 ( 1998), p. 405-413
    In: Canadian Journal of Zoology, Canadian Science Publishing, Vol. 76, No. 3 ( 1998), p. 405-413
    Type of Medium: Online Resource
    ISSN: 1480-3283 , 0008-4301
    RVK:
    Language: Unknown
    Publisher: Canadian Science Publishing
    Publication Date: 1998
    detail.hit.zdb_id: 1490831-1
    SSG: 12
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  • 9
    Online Resource
    Online Resource
    Canadian Science Publishing ; 1994
    In:  Canadian Journal of Zoology Vol. 72, No. 12 ( 1994-12-01), p. 2119-2123
    In: Canadian Journal of Zoology, Canadian Science Publishing, Vol. 72, No. 12 ( 1994-12-01), p. 2119-2123
    Abstract: The spatial distribution, survival, and growth of two full-sibling families of coho salmon (Oncorhynchus kisutch) in an experimental outdoor stream channel were compared between the families and with the performance of one of the families in an allopatric control channel after 75 d of rearing. No difference in survival was observed between families (81.2% overall), but their spatial distributions in the channel differed markedly. One family or the other numerically dominated 5 of 7 riffle-pool habitat units within the sympatric treatment channel. The family that was larger at the beginning of the experiment (0.52 vs. 0.37 g mean mass) was also larger at the end (2.03 vs. 1.58 g). While there was little evidence of density-dependent growth overall, the growth of each family was correlated with the density of siblings in the unit. However, the larger bodied family showed negative density-dependent growth, whereas the smaller bodied family showed positive density-dependent growth. These patterns of distribution and growth may have arisen from sibling recognition or some other proximate mechanism such as assortative distribution based on size or interfamily variation in aggression. Regardless of the mechanism, intrapopulation variation in distribution and growth may lead to considerable variation in fitness among families because these factors affect success in subsequent freshwater and marine life history stages.
    Type of Medium: Online Resource
    ISSN: 0008-4301 , 1480-3283
    RVK:
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 1994
    detail.hit.zdb_id: 1490831-1
    SSG: 12
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  • 10
    Online Resource
    Online Resource
    Canadian Science Publishing ; 1998
    In:  Canadian Journal of Zoology Vol. 76, No. 3 ( 1998-03-01), p. 405-413
    In: Canadian Journal of Zoology, Canadian Science Publishing, Vol. 76, No. 3 ( 1998-03-01), p. 405-413
    Abstract: Egg predation by coastrange sculpins (Cottus aleuticus) and slimy sculpins (C. cognatus) may be a major factor affecting sockeye salmon (Oncorhynchus nerka) production in Iliamna Lake, Alaska. In this study, we examined the potential roles of visual and chemosensory cues in egg predation by sculpins. A field study tested whether sculpins were differentially attracted to minnow traps baited with eggs that were (i) visible with no odours present, (ii) visible with odours present, or (iii) not visible with odours present. Our results indicated that sculpins do not require visual cues for detecting salmon eggs. However, attraction to sockeye eggs did require chemical cues emanating from the eggs. To characterize the chemical attractants that emanate from salmon eggs, we tested whether sculpins were attracted to test odours in a two-choice maze. Test odours were prepared by soaking eggs in lake water. Sculpins preferred egg wash to lake water but demonstrated no attraction to ovarian fluid versus lake water, suggesting that the attractive substances are derived directly from egg material. These results are discussed in relation to the known sensory mechanisms involved in feeding by sculpins as well as to the ecological relationship between spawning sockeye salmon and sculpins.
    Type of Medium: Online Resource
    ISSN: 0008-4301 , 1480-3283
    RVK:
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 1998
    detail.hit.zdb_id: 1490831-1
    SSG: 12
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