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Journal articles on the topic 'Downstream spawning'

Author: Grafiati

Published: 24 June 2021

Last updated: 29 July 2025

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1

Babcock, Russ, Elke Franke, and Neill Barr. "Does spawning depth affect fertilization rates? Experimental data from the sea star Coscinasterias muricata." Marine and Freshwater Research 51, no. 1 (2000): 55. http://dx.doi.org/10.1071/mf98132.

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Measurements of fertilization rates in free-spawning marine invertebrates have shown that reproductive success is related to both behavioural and environmental factors. Water depth has been suggested as being one such factor affecting fertilization success. In experimental spawnings of the sea star Coscinasterias muricata, fertilization rates decreased exponentially with distance from sperm source but were frequently greater than 20% at distances >10 m downstream. Current speed did not have a significant effect on fertilization rate over the range of velocities examined. Fertilization rates

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2

Sinnatamby, R. Niloshini, Madalena C. Pinto, Fiona D. Johnston, et al. "Seasonal timing of reproductive migrations in adfluvial bull trout: an assessment of sex, spawning experience, population density, and environmental factors." Canadian Journal of Fisheries and Aquatic Sciences 75, no. 12 (2018): 2172–83. http://dx.doi.org/10.1139/cjfas-2017-0542.

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Using individual tags combined with a fish fence operated at the mouth of Smith-Dorrien Creek, the primary spawning habitat for Lower Kananaskis Lake bull trout (Salvelinus confluentus), we approximated a complete census of the spawning population from 1996 to 2000 to assess whether timing of upstream and downstream spawning migrations varied with extrinsic and intrinsic factors. The timing of both upstream and downstream migrations varied with sex, previous spawning experience, density, and temperature. Inferred spawning duration based on the predicted upstream and downstream migration dates

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3

Brown, Richard S., and William C. Mackay. "Spawning ecology of cutthroat trout (Oncorhynchus clarki) in the Ram River, Alberta." Canadian Journal of Fisheries and Aquatic Sciences 52, no. 5 (1995): 983–92. http://dx.doi.org/10.1139/f95-097.

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Spawning movements of cutthroat trout (Oncorhynchus clarki) were evaluated using radiotelemetry in a montane river and a headwater tributary. The movements of 23 fish were monitored in spring 1991 and 1992. Fish moved upstream and downstream to spawning areas. These movements fell into two distinct patterns: in one, fish emigrated to tributaries and in the other they traveled to main-stem or side-channel spawning grounds. The pre- and post-spawning movements made by fish that spawned in tributaries were longer than those made by fish that spawned in the main-stem or side-channel areas. While s

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4

Castro-Santos, Theodore, and Benjamin H. Letcher. "Modeling migratory energetics of Connecticut River American shad (Alosa sapidissima): implications for the conservation of an iteroparous anadromous fish." Canadian Journal of Fisheries and Aquatic Sciences 67, no. 5 (2010): 806–30. http://dx.doi.org/10.1139/f10-026.

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We present a simulation model in which individual adult migrant American shad ( Alosa sapidissima ) ascend the Connecticut River and spawn, and survivors return to the marine environment. Our approach synthesizes bioenergetics, reproductive biology, and behavior to estimate the effects of migratory distance and delays incurred at dams on spawning success and survival. We quantified both the magnitude of effects and the consequences of uncertainty in the estimates of input variables. Behavior, physiology, and energetics strongly affected both the distribution of spawning effort and survival to

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5

Acolas, M. L., M. L. Bégout Anras, V. Véron, H. Jourdan, M. R. Sabatié, and J. L. Baglinière. "An assessment of the upstream migration and reproductive behaviour of allis shad (Alosa alosa L.) using acoustic tracking." ICES Journal of Marine Science 61, no. 8 (2004): 1291–304. http://dx.doi.org/10.1016/j.icesjms.2004.07.023.

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Abstract We provide a detailed description of the migratory and reproductive behaviour of allis shad (Alosa alosa L.), a species that is in decline in Europe. Adult swimming behaviour during the last part of upstream migration and on a spawning ground downstream of an insurmountable dam was studied in detail and its main features identified, “characterized” in this context. Mobile telemetry and a fixed telemetry system were used to record fish positions and to monitor 23 acoustically tagged individuals (17 females and six males) during the 2001 and 2002 reproductive seasons. Allis shad showed

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6

Chen, Pan, Lan Li, and Hongbin Zhang. "Spatio-temporal variability in the thermal regimes of the Danjiangkou reservoir and its downstream river due to the large water diversion project system in central China." Hydrology Research 47, no. 1 (2015): 104–27. http://dx.doi.org/10.2166/nh.2015.210.

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Understanding water temperature variation in regulated rivers and reservoirs becomes increasingly important as the environment and ecosystem are approaching their thermal limits. In this paper, a multi-model approach is used to quantitatively access the spatio-temporal change in thermal structures of the Danjiangkou reservoir and its downstream river. The area is subject to thermal and hydrological alterations due to three large water diversion projects and related auxiliary projects, including a project to heighten the Danjiangkou dam and two small downstream reservoirs. It is found that the

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7

Bradford, M. J., and G. C. Taylor. "Individual variation in dispersal behaviour of newly emerged chinook salmon (Oncorhynchus tshawytscha) from the Upper Fraser River, British Columbia." Canadian Journal of Fisheries and Aquatic Sciences 54, no. 7 (1997): 1585–92. http://dx.doi.org/10.1139/f97-065.

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Immediately after emergence from spawning gravels, fry of stream-type chinook salmon (Oncorhynchus tshawytscha) populations from tributaries of the upper Fraser River, British Columbia, distribute themselves downstream from the spawning areas, throughout the natal stream, and into the Fraser River. We tested the hypothesis that this range in dispersal distances is caused by innate differences in nocturnal migratory tendency among individuals. Using an experimental stream channel, we found repeatable differences in downstream movement behaviour among newly emerged chinook fry. Fish that moved d

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8

Bestgen, Kevin R., Harry J. Crockett, Matthew R. Haworth, and Ryan M. Fitzpatrick. "Production of Nonadhesive Eggs by Flathead Chub and Implications for Downstream Transport and Conservation." Journal of Fish and Wildlife Management 7, no. 2 (2016): 434–43. http://dx.doi.org/10.3996/022016-jfwm-018.

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Abstract Plains stream fishes in North America, including flathead chub Platygobio gracilis, are negatively affected by stream-flow alterations and fragmentation, and limited information on egg type and reproductive strategy hinders their conservation. On the basis of several lines of evidence, including laboratory culture, observations of reproduction in captivity, and capture and rearing of eggs from Fountain Creek, Colorado, we report that flathead chub produce nonadhesive eggs. Flathead chub eggs are relatively small at 2.3 mm mean diameter, have a greater yolk-to-egg volume ratio and thus

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9

Kantoush, Sameh, Takamasa Suzuki, Yasuhiro Takemon, et al. "Numerical study on reservoir sediment management through adding excavated sediment downstream of dams in Japan." E3S Web of Conferences 40 (2018): 03033. http://dx.doi.org/10.1051/e3sconf/20184003033.

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Dam related issues have become preoccupying, with raising concerns about detrimental environmental impacts and sedimentation in reservoirs. Reduction of the Ayu-fish production is due to increasing turbidity and decreasing coarse sediment supply by dams in the Tenryu River, Japan. The paper summarizes various case studies on excavated sediment supply in Japan and a case of numerical study to evaluate the effect of the supplied sediment on the spawning redds of Ayu-fish in the Tenryu River. Results of numerical simulations show that under the present management scheme of non-supplied sediment f

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10

Kaev, A. M., G. N. Dzen, P. S. Sukhonos, and I. S. Bobrov. "ESTIMATION OF ABUNDANCE FOR THE MIGRATING JUVENILE PINK SALMON IN THE RIVERS OF SAKHALIN AND ITURUP ISLANDS IN 2019." Izvestiya TINRO 200 (March 26, 2020): 82–100. http://dx.doi.org/10.26428/1606-9919-2020-200-82-100.

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Number of the pink salmon fry migrating downstream from their spawning grounds in the control rivers in 2019 is assessed as 17546.2 . 103 and 14795.7 . 103 ind. for the Dagi and Bolshoi Khuzi Rivers (northeastern Sakhalin), as 89.1 . 103 and 2636.1 . 103 ind. for the Poronai River tributaries — the Kholodny and Orlovka, as 2759.8 . 103 and 21456.0 . 103 ind. for the Lazovaya and Pugachevka Rivers (western coast of the Patience/Terpeniya Bay), as 5803.8 . 103 and 19020.0 . 103 ind. for the Voznesenka and Ochepuha Rivers (southeastern Sakhalin), as 1822.4 . 103 and 2139.0 . 103 for the Taranai a

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11

Chen, Bing Yu, Hui Huang Luo, Qing Rui Yang, Wei Huang, and Hui Ling Han. "The Eco-Hydrological Demand Research on Coreiusheterodon Reproduction in the Upper Yangtze River Reserve." Applied Mechanics and Materials 641-642 (September 2014): 226–31. http://dx.doi.org/10.4028/www.scientific.net/amm.641-642.226.

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The upper Yangtze river rare and endemic national nature reserve was set up to protect the rare and endemic fish. Affected by the cascade development of the downstream reach of the jinsha river, fish habitat in the national nature reserve have been changed significantly, which will affect the reproduction and growth of the fishes.The Coreius heterodon spawning grounds were located in the Main stream of the natural reserve, andits spawning season needs certain overflowing process to lay eggs. This article used the water level and flow data from 1956 to 2012 in the Zhu Tuo stationto analysis the

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12

Fortin, Réjean, Martin Léveillé, Paul Laramée, and Yves Mailhot. "Reproduction and year-class strength of the Atlantic tomcod (Microgadus tomcod) in the Sainte-Anne River, at La Pérade, Quebec." Canadian Journal of Zoology 68, no. 7 (1990): 1350–59. http://dx.doi.org/10.1139/z90-202.

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Experimental catches of a fyke-net fishery operated in the Sainte-Anne River during the 1980–1981 to 1983–1984 spawning seasons showed that although the majority of adult tomcod migrate upstream during rising tide, significant numbers do so against the tidal current. Most spawners return to the Saint Lawrence River during a falling tide. In the first 2 years, peak upstream migration occurred during the second half of December, and in the last 2 years, early in the second half of January. The date of peak upstream migration is significantly correlated with September and October air temperature

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13

Sari, Leni Indah, Rusdi Machrizal, and Ilham Hakiki Harahap. "Analysis of Water Quality at The Peak of Spawning Season Tenualosa ilisha at The Downstream of Bilah River." JURNAL PEMBELAJARAN DAN BIOLOGI NUKLEUS 11, no. 1 (2025): 89–102. https://doi.org/10.36987/jpbn.v11i1.6380.

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Water quality analysis plays an important role in understanding the environmental factors that affect aquatic life, especially during critical periods such as fish spawning. The purpose of this study was to investigate several aspects related to water quality and its impact on hilsa fish species during their life cycle period. The study was conducted in Sungai Bilah over a four-month period in 2023, focusing on three specialized stations to assess water quality during the peak season of hilsa fish spawning. This study uses the descriptive method, with strategic sampling locations determined th

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14

Cox, Tanner L., Christopher S. Guy, Luke M. Holmquist, and Molly A. H. Webb. "Spawning Locations of Pallid Sturgeon in the Missouri River Corroborate the Mechanism for Recruitment Failure." Fishes 8, no. 5 (2023): 243. http://dx.doi.org/10.3390/fishes8050243.

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Conservation propagation of pallid sturgeon (Scaphirhynchus albus) upstream of Fort Peck Reservoir, MT, USA, has successfully recruited a new generation of spawning-capable pallid sturgeon where there would otherwise be fewer than 30 remaining wild reproductively mature pallid sturgeon. Successful recovery of pallid sturgeon will now rely on the behavior of pallid sturgeon (e.g., successful spawning in locations that provide adequate drift distance for larvae to recruit). We used location data of pallid sturgeon during four putative spawning seasons to answer the following questions: Where do

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15

Ambarwati, A., H. Effendi, Zairion, et al. "Reproductive biology of red-tailed goby (Sicyopterus lagocephalus, Pallas 1770) as migratory fish in Cibareno River, Sukabumi, West Java." IOP Conference Series: Earth and Environmental Science 1266, no. 1 (2023): 012002. http://dx.doi.org/10.1088/1755-1315/1266/1/012002.

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Abstract The red-tailed goby (Sicyopterus lagocephalus) is an Indonesian endemic fish that can be found in the Cibareno River. The red-tailed goby is an amphibious fish. The dam construction plan in Cibareno River is expected to affect the reproduction pattern and survival of red-tailed goby. This study aims to analyse the reproductive biology of long-tailed gobies (Sicyopterus lagocephalus, Pallas 1770). The study was conducted over four months (May, June, July and September 2022) in Cibareno River, Sukabumi, West Java using purposive sampling method. A total of 163 fish samples were caught d

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16

Hinckley, Sarah, Kevin M. Bailey, Susan J. Picquelle, James D. Schumacher, and Phyllis J. Stabeno. "Transport, Distribution, and Abundance of Larval and Juvenile Walleye Pollock (Theragra chalcogramma) in the Western Gulf of Alaska." Canadian Journal of Fisheries and Aquatic Sciences 48, no. 1 (1991): 91–98. http://dx.doi.org/10.1139/f91-013.

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The spawning distribution of walleye pollock (Theragra chalcogramma) and subsequent southwesterly drift of eggs, larvae, and juveniles were investigated in Shelikof Strait, March–September 1987. In mid-March, a hydroacoustics survey found that spawning adults were concentrated in the deeper parts of Shelikof Strait, as were eggs collected in this area during an ichthyoplankton survey about 1 mo later. In May, a concentration of young larvae was found 100–150 km to the southwest of the spawning area. In late June and early July, the center of distribution of late larval and early juvenile walle

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17

Beer, W. Nicholas, and James J. Anderson. "Effect of spawning day and temperature on salmon emergence: interpretations of a growth model for Methow River chinook." Canadian Journal of Fisheries and Aquatic Sciences 58, no. 5 (2001): 943–49. http://dx.doi.org/10.1139/f01-049.

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A mechanistic temperature-dependent model for preemergent growth coupled with spawning and river temperature data is used to evaluate early life history strategies for chinook salmon (Oncorhynchus tshawytscha) in the Methow River, Washington, U.S.A. Since the model provides a predictable coupling between time of spawning and fry emergence, it helps explain the spatial and temporal patterns observed for the sympatric stocks. The model suggests that progeny of August-spawning chinook in upper river habitats emerge at button-up (no visible yolk sac) over a wide range of days in the early spring.

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18

Heggberget, Tor G., Lars P. Hansen, and Tor F. Næsje. "Within-River Spawning Migration of Atlantic Salmon (Salmo salar)." Canadian Journal of Fisheries and Aquatic Sciences 45, no. 10 (1988): 1691–98. http://dx.doi.org/10.1139/f88-200.

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The migration pattern of adult spawners of Atlantic salmon (Salmo salar) in two Norwegian streams was analysed by ultrasonic and mechanical tagging to investigate within-river migration. Salmon were tagged in the estuary as they approached the river before spawning. They displayed a systematic and directional upstream pattern of movement in the river. Seventy-one percent of the fish transplanted 6 km downstream from the capture site about 2 mo before spawning returned to the donor area. Fish transported 7 km upstream from the capture site exhibited a low degree of backtracking to the donor sit

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19

Duong, Thuy Yen, Kim T. Scribner, James A. Crossman, Patrick S. Forsythe, and Edward A. Baker. "Environmental and maternal effects on embryonic and larval developmental time until dispersal of lake sturgeon (Acipenser fulvescens)." Canadian Journal of Fisheries and Aquatic Sciences 68, no. 4 (2011): 643–54. http://dx.doi.org/10.1139/f2011-008.

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For migratory fish like lake sturgeon ( Acipenser fulvescens ), the period from egg deposition through embryonic and larval development until dispersal (ELDTUD) contributes substantially to variation in survival at the individual level and to population levels of recruitment. Using genetically determined parentage, we examined the relative importance of environmental variables in a stream environment (e.g., temperature and discharge) and maternal effects (including individual female body size, spawning time, and location) to ELDTUD on an individual basis. Adult lake sturgeon (n = 208) spawning

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20

Dębowski, Piotr, Rafał Bernaś, Michał Skóra, and Jacek Morzuch. "Mortality of silver eel (Anguilla anguilla) migrating downstream through a small hydroelectric plant on the Drawa River in northern Poland." Archives of Polish Fisheries 24, no. 2 (2016): 69–75. http://dx.doi.org/10.1515/aopf-2016-0008.

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Abstract The European eel, Anguilla anguilla L., is an endangered species. Barriers to its downstream spawning migration are one of the greatest threats this species faces. There are hundreds of hydroelectric plants (HEP) on rivers in Poland (> 600), and thousands throughout Europe. Eel that pass through HEP turbines as they migrate downstream suffer high mortality, but this depends mainly on local and technical conditions. Silver eel mortality was estimated and the possibility of the fish bypassing the turbines was studied between November 2013 and June 2014 at a typical HEP in northern Po

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21

Warrillow, J. A., D. C. Josephson, W. D. Youngs, and C. C. Krueger. "Differences in sexual maturity and fall emigration between diploid and triploid brook trout (Salvelinus fontinalis) in an Adirondack lake." Canadian Journal of Fisheries and Aquatic Sciences 54, no. 8 (1997): 1808–12. http://dx.doi.org/10.1139/f97-087.

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High levels of emigration coincident with maturity and spawning have been reported from brook trout (Salvelinus fontinalis) populations in Adirondack lakes. These lakes typically had few spawning areas and required stocking to maintain populations. We compared diploid and triploid brook trout to identify differences in gonadal development and emigration. Age 1 + and 2 + diploid and triploid brook trout held in captivity were examined internally for gonadal development. More diploid trout were mature than triploid fish (p < 0.01). Of triploid brook trout that matured, all were males. Yearlin

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22

Bazov, A. V., N. V. Bazova, and N. L. Frolova. "Distance of the Spawning Migration of Baikal Omul Coregonus migratorius (Salmonidae: Coregoninae) in the Selenga River (Lake Baikal Basin)." Voprosy ihtiologii 64, no. 3 (2024): 294–311. http://dx.doi.org/10.31857/s0042875224030044.

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The results of a study of the distribution of eggs of Baikal omul Coregonus migratorius in a large foothill watercourse in Siberia in 1935–2022 are presented. The distanse of omul spawning migration in the Selenga River (some of the river parameters are taken into account since 1920) depends on a certain combination of abiotic environmental factors, biological parameters of spawners, timing of entry into the river, and the number of their spawning herd. The distance of migration has a high inverse correlation with the degree of maturity of the spawners, which is expressed by the maturity index

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23

Gresswell, Bob, and Kris Homel. "Evaluating the Movement Patterns of Snake River Finespotted Cutthroat Trout in the Snake River Below Jackson Lake Dam, Grand Teton National Park." UW National Parks Service Research Station Annual Reports 31 (January 1, 2008): 23–28. http://dx.doi.org/10.13001/uwnpsrc.2008.3693.

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The Snake River finespotted cutthroat trout Oncorhynchus clarkii behnkei has been formally recognized as a subspecies of cutthroat trout Oncorhynchus clarkii, but it is more generally perceived as a morphologically divergent ecotype of the more broadly distributed Yellowstone cutthroat trout Oncorhynchus clarkii bouvieri. This large-river cutthroat trout has persisted in the Snake River downstream of Jackson Lake Dam through a century of flow regulation. Although there is a popular sport fishery focused on this native trout, spawning and distribution patterns throughout its range are poorly un

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24

Koster, W. M., D. R. Dawson, J. R. Morrongiello, and D. A. Crook. "Spawning season movements of Macquarie perch (Macquaria australasica) in the Yarra River, Victoria." Australian Journal of Zoology 61, no. 5 (2013): 386. http://dx.doi.org/10.1071/zo13054.

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The Macquarie perch (Macquaria australasica) is a threatened fish species that inhabits rivers and impoundments in south-eastern Australia. Previous studies have shown that Macquarie perch in impoundments exhibit synchronised upstream spawning migrations to shallow, fast-flowing habitats in the lower reaches of inflowing streams. There has been little study of movement behaviours of entirely riverine populations of Macquarie perch despite this being the species’ natural habitat. Here, radio-telemetry is used to test the hypothesis that riverine populations exhibit synchronised migrations durin

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25

Harper, Ken C., Frank Harris, Steve J. Miller, John M. Thalhauser, and Scott D. Ayers. "Life History Traits of Adult Broad Whitefish and Humpback Whitefish." Journal of Fish and Wildlife Management 3, no. 1 (2012): 56–75. http://dx.doi.org/10.3996/022011-jfwm-011.

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Abstract Broad whitefish Coregonus nasus and humpback whitefish C. pidschian are important to the regional subsistence economy of the Kuskokwim River watershed, Alaska, where they and other whitefish constitute greater than half of the nonsalmon fish harvests. Harvest occurs year-round from lakes, ponds, and the mainstem by subsistence fishermen and through a limited number of commercial permits. Little is known about the life history (e.g., migration patterns) of these species, and subsistence fishers have raised concerns about declining body size and abundance. Project objectives were to 1)

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26

Merz, Joseph E., Jose D. Setka, Gregory B. Pasternack, and Joseph M. Wheaton. "Predicting benefits of spawning-habitat rehabilitation to salmonid (Oncorhynchus spp.) fry production in a regulated California river." Canadian Journal of Fisheries and Aquatic Sciences 61, no. 8 (2004): 1433–46. http://dx.doi.org/10.1139/f04-077.

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We tested the hypothesis that spawning-bed enhancement increases survival and growth of chinook salmon (Oncorhynchus tshawytscha) embryos in a regulated California stream with a gravel deficit. We also examined how 12 physical parameters correlated within spawning sites and how well they predicted survival and growth of chinook salmon and steelhead (Oncorhynchus mykiss) embryos. Salmon embryos planted in enhanced gravels had higher rates of survival to the swim-up stage than embryos planted in unenhanced spawning gravels. No significant increase in growth was observed. Intergravel temperature

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Harding, D. J., D. T. Roberts, D. Sternberg, T. M. Mullins, M. J. Kennard, and R. G. Dwyer. "Flow-related migration, juvenile dispersal and gonad development in two co-occurring mullet species, Mugil cephalus and Trachystoma petardi, in a regulated river system." Marine and Freshwater Research 70, no. 8 (2019): 1105. http://dx.doi.org/10.1071/mf18365.

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Catadromous fish species often use elevated flows to migrate from freshwater to downstream spawning grounds. However, in regulated river systems, artificial barriers and flow alteration can disrupt movement cues, affecting fish migration. Using a combination of acoustic telemetry, passive integrated transponder (PIT) tags and gonad maturity data, we assessed the migratory timing and flow requirements for downstream spawning migrations and upstream dispersal in two co-occurring mullet species in the Logan River, eastern Australia. Over 4 years, 141 adult sea mullet (Mugil cephalus) and 28 adult

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28

Zelalem, Wondie, Minwyelet Mingist, Wassie Anteneh, et al. "Spawning migration and habitat characteristics of Labeobarbus species in the Gumara River and its tributaries, Lake Tana subbasin, Ethiopia." Belgian Journal of Zoology 154 (July 9, 2024): 97–116. http://dx.doi.org/10.26496/bjz.2024.183.

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Information on the spawning migration and habitat use of migratory fish is critical to protect and restore threatened or endangered populations. Twenty-two individuals of three species, namely Labeobarbus platydorsus, L. megastoma, and L. truttiformis, were implanted with radio tags to study their spawning migration in the Gumara River and its tributaries between July and October of 2018 to 2021. Fourteen individuals were found at least twice throughout their migration, eleven moved upstream up to 41.0 and 44.4 river kilometers (rkm), and three were tracked when moving downstream. The upstream

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Rodtka, Mike, Chad Judd, and Peter Aku. "Displacement of migratory Bull Trout (<i>Salvelinus confluentus</i>) spawning by a newly constructed beaver (<i>Castor canadensis</i>) dam in a west-central Alberta stream." Canadian Field-Naturalist 138, no. 2 (2025): 125–29. https://doi.org/10.22621/cfn.v138i2.3265.

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Despite broad overlap of the ranges of Bull Trout (Salvelinus confluentus) and North American Beaver (Castor canadensis),relatively little is published in the peer-reviewed literature on their interaction. Beavers are ecosystem engineers with the potential to transform lotic environments, while Bull Trout are of conservation concern and subject to various protective measures throughout their range. The impact of beaver activity on trout populations is context dependent, and our appreciation of the scope of this impact depends on documentation. We report on the disruption of Bull Trout spawning

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Ostrovskiy, V. I., and A. M. Kaev. "Factors Determining the Replenishment of Pink Salmon Oncorhynchus gorbuscha (Salmonidae) on Iturup Island." Вопросы ихтиологии 63, no. 3 (2023): 326–38. http://dx.doi.org/10.31857/s0042875223030153.

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Based on the data on the abundance of 53 generations of pink salmon Oncorhynchus gorbuscha of Iturup Island (spawners on spawning grounds, downstream migrating juveniles and the return of mature fish), a model describing the dependence of the abundance of mature pink salmon offspring on the initial abundance of generations and the effect of external factors was constructed using nonlinear regression analysis. The model explains about 80% of the replenishment variability, and it depends more on the effect of external factors in the freshwater period of life. The variability of replenishment is

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Usvyatsov, Sima, Jeffrey Picka, Ryan Scott Hardy, Travis Dawson Shepherd, James Watmough, and Matthew Kenneth Litvak. "Modeling the timing of spawning and hatching of shortnose sturgeon, Acipenser brevirostrum, in the Saint John River, New Brunswick, Canada." Canadian Journal of Fisheries and Aquatic Sciences 69, no. 8 (2012): 1316–28. http://dx.doi.org/10.1139/f2012-062.

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Timing of spawning and hatching of shortnose sturgeon, Acipenser brevirostrum , in the Saint John River, New Brunswick, Canada, was estimated using inverse prediction. We examined egg incubation periods at 5, 9, and 13 °C to back-calculate spawning dates. No larvae hatched at 5 °C. At 9 and 13 °C, hatching began after 18 and 8 days post fertilization, respectively. Lengths of yolk-sac larvae reared in the laboratory at 13–21 °C were used to develop a temperature-mediated Gompertz growth model. The inverted Gompertz model, predicting larval age from larval size and water temperature, was applie

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Burger, Carl V., Richard L. Wilmot, and David B. Wangaard. "Comparison of Spawning Areas and Times for Two Runs of Chinook Salmon (Oncorhynchus tshawytscha) in the Kenai River, Alaska." Canadian Journal of Fisheries and Aquatic Sciences 42, no. 4 (1985): 693–700. http://dx.doi.org/10.1139/f85-089.

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From 1979 to 1982,188 chinook salmon (Oncorhynchus tshawytscha) were tagged with radio transmitters to locate spawning areas in the glacial Kenai River, southcentral Alaska. Results confirmed that an early run entered the river in May and June and spawned in tributaries, and a late run entered the river from late June through August and spawned in the main stem. Spawning peaked during August in tributaries influenced by lakes, but during July in other tributaries. Lakes may have increased fall and winter temperatures of downstream waters, enabling successful reproduction for later spawning fis

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Tallman, Ross F., and Michael C. Healey. "Phenotypic Differentiation in Seasonal Ecotypes of Chum Salmon, Oncorhynchus keta." Canadian Journal of Fisheries and Aquatic Sciences 48, no. 4 (1991): 661–71. http://dx.doi.org/10.1139/f91-083.

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We compared the reproductive environments and phenotypes of early and late season breeding stocks of chum salmon, Oncorhynchus keta, to test the hypothesis that seasonal separation has resulted in phenotypically distinct forms. These were autumn- and winter-spawning populations from Bush Creek (Vancouver Island, B.C.) and a winter-spawning stock from nearby Walker Creek. All stocks had a similar time of downstream migration of the fry. No differences were found among the Walker Creek and the autumn-spawning stock of Bush Creek in age at maturity, length composition of spawners, egg size, verte

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Broadhurst, B. T., B. C. Ebner, M. Lintermans, J. D. Thiem, and R. C. Clear. "Jailbreak: a fishway releases the endangered Macquarie perch from confinement below an anthropogenic barrier." Marine and Freshwater Research 64, no. 9 (2013): 900. http://dx.doi.org/10.1071/mf12245.

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Management interventions are often needed to facilitate the recovery of ecosystems affected as a result of human alteration. Population-level monitoring is often central to evaluating the effectiveness of specific on-ground actions. In the present study, we assessed the response of a remnant population of the endangered Macquarie perch (Macquaria australasica) to the construction of a rock ramp fishway on the Cotter River, Australia, over a 7-year period. Prior to fishway construction, this obligate riverine spawner had been previously confined to Cotter Reservoir and six kilometres of stream

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Young, Jeffery L., Scott G. Hinch, Steven J. Cooke, et al. "Physiological and energetic correlates of en route mortality for abnormally early migrating adult sockeye salmon (Oncorhynchus nerka) in the Thompson River, British Columbia." Canadian Journal of Fisheries and Aquatic Sciences 63, no. 5 (2006): 1067–77. http://dx.doi.org/10.1139/f06-014.

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Since 1995, large segments of the late-run sockeye salmon (Oncorhynchus nerka) stock complex from the Fraser River, British Columbia, Canada, have been initiating spawning migrations several weeks earlier than normal. Most aberrant migrants die before spawning. To evaluate the mechanisms underlying the mortality, we intercepted late-run sockeye salmon of the AdamsShuswap stock complex halfway along their freshwater migration (i.e., in the Thompson River Canyon situated 270 km from the Fraser estuary), nonlethally assessed physiological and energetic status, and tracked individuals using gastr

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Kaev, A. M. "Features of fishery and indices of reproduction for pink salmon Oncorhynchus gorbuscha of Iturup Island (Kuril Islands)." Izvestiya TINRO 202, no. 1 (2022): 71–91. http://dx.doi.org/10.26428/1606-9919-2022-202-71-91.

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Annual data on the 1976–2019 year-classes of pink salmon from Iturup Island are presented, as their number on spawning grounds, abundance of wild and hatchery juveniles migrating downstream, and returns of adult fish after the marine period of life. On average, 1.48 . 106 spawners entered annually the rivers of Iturup Island in these years and 237 . 106 fry juveniles rolled down (the downstream migration index was 165 juveniles per conventional producer), plus 133 . 106 juveniles from salmon hatcheries. After fattening in the sea, the annual returns were 16.56 . 106 ind., on average, so the ma

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Shkura, Viktor N., and Alexey V. Shevchenko. "Structural solutions and hydrometric parameters of fish passage and spawning channel tracts with elements of enhanced roughness." Land Reclamation and Hydraulic Engineering 14, no. 1 (2024): 205–24. http://dx.doi.org/10.31774/2712-9357-2024-14-1-205-224.

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Purpose: to develop proposals for the design and methodology for calculating the hydrometric parameters of fish passage and spawning channel tracts at waterworks. Materials and methods. The factual basis of the work is data of hydrometric studies of the Nikolaevsky and Konstantinovsky fish passage and spawning channels and materials of technical justification of channel projects at the Bagaevsky and Kochetovsky waterworks on the river Don. The methodological basis of study was the results of the authors’ research and well-known recommendations for determining the parameters of channel tracts w

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Larson, Douglas L., Jacob G. Kimmel, Joseph J. Riedy, Jonathan Hegna, Edward A. Baker, and Kim T. Scribner. "Male lake sturgeon (Acipenser fulvescens) migratory and spawning behaviors are associated with sperm quality and reproductive success." Canadian Journal of Fisheries and Aquatic Sciences 77, no. 12 (2020): 1943–59. http://dx.doi.org/10.1139/cjfas-2020-0124.

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Intra-annual reproductive investments may not be predictive of male reproductive success because of the effects of intra- and intersexual interactions on sperm depletion. For long-lived iteroparous fish species such as lake sturgeon (Acipenser fulvescens), reproductive effort may affect lifetime reproductive success. Radio frequency identification antennas were placed at the mouth of the Upper Black River, Michigan, and downstream of spawning locations to quantify male migratory and mating behaviors, including upstream migration time (UT), river residence time (RT), number of intra-annual spaw

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Acolas, M. L., V. Véron, H. Jourdan, M. L. Bégout, M. R. Sabatié, and J. L. Baglinière. "Upstream migration and reproductive patterns of a population of allis shad in a small river (L'Aulne, Brittany, France)." ICES Journal of Marine Science 63, no. 3 (2006): 476–84. http://dx.doi.org/10.1016/j.icesjms.2005.05.022.

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Abstract The characteristics and activity of adult allis shad [Alosa alosa (L.)] were analysed during the last part of their upstream migration in the L'Aulne, a small river in Brittany, and during reproduction on a unique spawning ground downstream of an insurmountable dam. The age of the spawners ranged from three to seven years, females being larger and older than males. Population-level migration and reproduction were studied by counting the number of migrating fish, by estimating the sex ratio, and by counting the number of nocturnal spawning acts for three consecutive years starting in 2

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Koster, W. M., D. R. Dawson, and D. A. Crook. "Downstream spawning migration by the amphidromous Australian grayling (Prototroctes maraena) in a coastal river in south-eastern Australia." Marine and Freshwater Research 64, no. 1 (2013): 31. http://dx.doi.org/10.1071/mf12196.

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Understanding the reasons and cues for migration is crucial for developing effective conservation and management strategies of diadromous fishes. Spawning and movement patterns of the threatened diadromous Australian grayling (Prototroctes maraena) were investigated in the Bunyip River, Victoria, using drift sampling (2008–2011) and acoustic telemetry (2009–2010) during the autumn–winter spawning period of each year. Fifty-five adult fish (2009: n = 21; 2010: n = 34) were tagged and released in February ~15–30 km upstream of the Bunyip River estuary. Thirteen fish (2009: n = 7; 2010: n = 6) un

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MacDonald, D. D., and L. E. McDonald. "The Influence of Surface Coal Mining on Potential Salmonid Spawning Habitat in the Fording River, British Columbia." Water Quality Research Journal 22, no. 4 (1987): 584–95. http://dx.doi.org/10.2166/wqrj.1987.047.

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Abstract A total of six sites, with similar physical and hydraulic characteristics, located upstream and downstream of the Fording Coal Ltd. mining operation were selected to assess the Influence of mining activities on the quality of stream-bed substrates. The particle size distributions of gravel-bed materials in the Fording River were described using substrate statistics commonly found in the literature. Statistically significant differences (p &lt; 0.001) between upstream (control) and downstream sites were detected in the percentage of sediments smaller than 2.00 mm and 6.35 mm. The d

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42

Quellet, Patrick, and Julian J. Dodson. "Dispersion and Retention of Anadromous Rainbow Smelt (Osmerus mordax) Larvae in the Middle Estuary of the St. Lawrence River." Canadian Journal of Fisheries and Aquatic Sciences 42, no. 2 (1985): 332–41. http://dx.doi.org/10.1139/f85-042.

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The vertical and horizontal distribution of anadromous rainbow smelt (Osmerus mordax) larvae from hatching in their natal river to their occupation of nursery areas in the middle estuary of the St. Lawrence River was documented to describe the mechanism responsible for the retention of smelt larvae in this area. Peaks of larval abundance observed downstream of the spawning grounds indicate a 24-h periodicity in hatching and the introduction of larvae into the riverine circulation. No retention of larvae was observed between the spawning ground and the downstream portion of the natal river. Our

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Nyqvist, D., O. Calles, E. Bergman, A. Hagelin, and L. A. Greenberg. "Post-Spawning Survival and Downstream Passage of Landlocked Atlantic Salmon (Salmo salar ) in a Regulated River: Is There Potential for Repeat Spawning?" River Research and Applications 32, no. 5 (2015): 1008–17. http://dx.doi.org/10.1002/rra.2926.

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Ostrovsky, V. I. "An extended model for the formation of the number of generations for the Amur River summer chum salmon (Oncorhynchus keta)." Problems of Fisheries 25, no. 4 (2024): 25–40. https://doi.org/10.36038/0234-2774-2024-25-4-25-40.

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We analyzed the reasons for deviations in the number of summer Amur chum salmon offspring from the theoretical «parent-offspring» relationship described by the Ricker equation. It is shown that the strongest deviations are caused by precipitation in the year of spawning and in the year of downstream migration of juvenile fish. The second most influential factor is the pre-winter air temperature in the year of spawning. These both factors are positively correlated with the magnitude of deviations. It is proposed an equation describing the relationship between the number of offspring and the num

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45

Goto, Akira. "Reproductive Behavior and Homing after Downstream Spawning Migration in the River Sculpin, Cottus hangiongensis." Ichthyological Research 34, no. 4 (1988): 488–96. http://dx.doi.org/10.1007/bf02905655.

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Crook, David A., Wayne M. Koster, Jed I. Macdonald, et al. "Catadromous migrations by female tupong (Pseudaphritis urvillii) in coastal streams in Victoria, Australia." Marine and Freshwater Research 61, no. 4 (2010): 474. http://dx.doi.org/10.1071/mf09170.

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Understanding migratory requirements is critical for the conservation of diadromous fishes. Tupong (Pseudaphritis urvillii) are diadromous fishes found in freshwater and estuarine regions of south-eastern Australia. Previous studies have hypothesised that mature female tupong undertake downstream spawning migrations from freshwater to the estuary or sea, with a compensatory return of juveniles, and possibly spent fish, back upstream. We applied acoustic telemetry to test this hypothesis. We tagged 55 female tupong in two river systems in Victoria, Australia, and tracked movements for 4- to 6-m

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Schrank, Amy J., and Frank J. Rahel. "Movement patterns in inland cutthroat trout (Oncorhynchus clarki utah): management and conservation implications." Canadian Journal of Fisheries and Aquatic Sciences 61, no. 8 (2004): 1528–37. http://dx.doi.org/10.1139/f04-097.

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Knowledge of movement patterns is critical to the management and conservation of inland salmonids. We studied the movements of Bonneville cutthroat trout (Oncorhynchus clarki utah) in a drainage in western Wyoming, USA. Our objectives were to (i) characterize the postspawning movement patterns of adult Bonneville cutthroat trout, (ii) contrast postspawning and summer movement patterns, and (iii) identify factors that disrupt the movements of Bonneville cutthroat trout. Our data showed that postspawning movements of Bonneville cutthroat trout formed a continuum, with fish moving from 0.5 to 82.

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Voicu, Răzvan, Artur Radecki-Pawlik, Liliana Voicu, Joseph Dominick Urbani, and Doru Bănăduc. "Innovative On-Site Adapted System for Fish Migration with Flow Divider and Glass Collector Basin." Transylvanian Review of Systematical and Ecological Research 22, no. 1 (2020): 81–98. http://dx.doi.org/10.2478/trser-2020-0006.

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Abstract The authors designed a new site-adapted fish passage system for upstream and downstream migration of small and large fish on the urban sector of the Bistriţa River. The longitudinal connectivity of this lotic system is interrupted by numerous transversal hydrotechnical works (weirs). This proposed system was designed to facilitate fish migration, promote fish recolonization of upstream and downstream habitats, allow the expansion of fish range, and increase spawning potential. All components of the proposed system are attached to a concrete girder located to the right stream bank, exc

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Shevlyakov, Е. А., N. А. Dederer, V. I. Ostrovsky, and G. V. Khen. "Thermal conditions in the marine coastal waters as a factor favorable for formation of extra-strong year-classes of Karaginsky pink salmon." Izvestiya TINRO 204, no. 1 (2024): 30–47. http://dx.doi.org/10.26428/1606-9919-2024-204-30-47.

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Variability of the timing for downstream migration of juvenile pink salmon from the Hailulya River to the adjacent coastal waters of Karaginsky Bay is considered and influence of the coastal water temperature on strength of the year-classes for two generative lines of pink salmon spawning in the Karaginsky Bay is analyzed for 1978–2020. The optimal conditions for the downstream migration in the period after 2002 are determined as the mean weighted per migration intensity water temperature > 5.6 o C (up to 7.8 о С on average with the maximum 9.9 о С in some years) and a stable increasing of

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D'Amours, Julie, Stéphanie Thibodeau, and Réjean Fortin. "Comparison of lake sturgeon (Acipenser fulvescens), Stizostedion spp., Catostomus spp., Moxostoma spp., quillback (Carpiodes cyprinus), and mooneye (Hiodon tergisus) larval drift in Des Prairies River, Quebec." Canadian Journal of Zoology 79, no. 8 (2001): 1472–89. http://dx.doi.org/10.1139/z01-095.

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Several fish species that spawn in lotic habitats have a larval-drift phase which is a major determinant of their reproductive success. The main objective of this study was to compare seasonal, diel, longitudinal, transverse, and vertical variations in rates of lake sturgeon (Acipenser fulvescens), Stizostedion spp., Catostomus spp., Moxostoma spp., quillback (Carpiodes cyprinus), and mooneye (Hiodon tergisus) larval drift in Des Prairies River (DPR) near Montreal (Quebec), which is one of the major lotic spawning habitats of the St. Lawrence River system. Larval sampling was conducted in the

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