Regurgitation Rates of Intragastric Radio Transmitters by Adult Chinook Salmon and Steelhead during Upstream Migration in the Columbia and Snake Rivers

Keefer, Matthew L.; Peery, Christopher A.; Ringe, R. R.; Bjornn, T. C.

doi:10.1577/m02-128

Cited by 60 publications

(65 citation statements)

References 11 publications

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“…Tag expulsion can be a major problem in telemetry studies (Welch et al 2007;Keefer et al 2010), and instances of regurgitation are well documented for adult salmonids gastrically implanted with radio tags (McCleave et al 1978;Mellas and Haynes 1985;Smith et al 1998;Keefer et al 2004). In our study, only one gastrically implanted fish (5%) regurgitated its transmitter, and that tag carried a roughness band.…”

Section: Discussionmentioning

confidence: 99%

Experimental Evaluation of Adult Spring Chinook Salmon Radio‐Tagged during the Late Stages of Spawning Migration

Corbett¹,

Moser²,

Dittman³

2012

N American J Fish Manag

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We conducted an experiment to assess the effects of radio‐ tagging on adult spring Chinook salmon Oncorhynchus tshawytscha during the late stages of their spawning migration. Fish were captured at Roza Dam, Yakima River, Washington (river kilometer 208). Each fish had a radio tag inserted into the stomach via the esophagus and was then transported to a raceway and held for 50 d to assess survival. In the same raceway we also held a control group that was handled but not tagged and a group with externally attached transmitters. Survival of fish with gastrically implanted radio tags was low (10%), while 70% of controls and 90% of fish with externally mounted tags survived to the end of the experiment. Postmortem dissections revealed that after implantation, some radio tags had migrated from the stomach position to the posterior digestive tract and peritoneum. Fish from all treatments exhibited some level of tissue degeneration of the gastrointestinal tract. Gastric implantation should be used with caution, particularly for fish at vulnerable life stages. For spring Chinook salmon in the Columbia River basin, tagging with gastric implants should be conducted early in the freshwater migration to improve survival and reduce tag effects. Received September 30, 2011; accepted June 4, 2012

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Section: Discussionmentioning

confidence: 99%

Experimental Evaluation of Adult Spring Chinook Salmon Radio‐Tagged during the Late Stages of Spawning Migration

Corbett¹,

Moser²,

Dittman³

2012

N American J Fish Manag

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“…Once inside the facility, fish were either diverted into anesthetic tanks for tagging or returned to the main ladder without handling. The methods used for trapping, intragastric tagging, and radiotelemetry monitoring have been described in detail by Reischel and Bjornn (2003); Keefer et al (2004b), and Naughton et al (2005).…”

Section: Fish Trapping Tagging and Monitoringmentioning

confidence: 99%

Influence of pinniped-caused injuries on the survival of adult Chinook salmon (Oncorhynchus tshawytscha) and steelhead trout (Oncorhynchus mykiss) in the Columbia River basin

NaughtonGeorge

KeeferMatthew

ClaboughTami

et al. 2011

Can. J. Fish. Aquat. Sci.

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Increasing pinniped abundance in the Pacific Northwest has coincided with population declines of Pacific salmon (Oncorhynchus spp.) and steelhead trout (Oncorhynchus mykiss), and concentrated predation may affect the recovery of some threatened and endangered salmonid stocks. We used radiotelemetry to evaluate pinniped-caused injury effects on migration survival of 17 007 adult Columbia River Chinook salmon (Oncorhynchus tshawytscha) and steelhead trout. Injuries from pinnipeds were common (mean injury rate across 29 run-years = 36.5%) and were most common for spring Chinook salmon and steelhead trout. Injury was not consistently associated with adult survival to spawning tributaries, but some negative survival effects were detected. Pinniped-caused injury rates decreased as annual run sizes increased, indicating densitydependent or saturation effects. Within a run, large fish generally had a higher injury incidence than small fish, suggesting pinnipeds targeted large fish or more efficiently captured small fish. Seasonal, size-dependent, and density-dependent results imply that pinniped effects likely differ widely among salmonid populations within the Columbia River basin. A better understanding of these effects is needed to guide management and conservation strategies.Résumé : L'augmentation d'abondance des pinnipèdes dans le Nord-Ouest Pacifique coïncide avec les déclins démographi-ques des saumons du Pacifique (Oncorhynchus spp.) et de la truite arc-en-ciel anadrome (Oncorhynchus mykiss) et la concentration de la prédation peut affecter le rétablissement de quelques stocks de salmonidés menacés et en péril. La radiotélémétrie nous a servi à évaluer les effets des blessures causées par les pinnipèdes sur la survie durant la migration de 17 007 saumons chinook (Oncorhynchus tshawytscha) et truites arc-en-ciel anadromes adultes dans le fleuve Columbia. Les blessures dues aux pinnipèdes sont communes (taux moyen de blessures dans 29 montaisons-années = 36,5 %) et sont plus abondantes chez les saumons chinook et truites arc-en-ciel anadromes de printemps. Il n'y a pas d'association constante entre les blessures et la survie des adultes jusqu'aux tributaires de fraie, mais on peut déceler des effets négatifs sur la survie. Les taux de blessures dues aux pinnipèdes diminuent à mesure que la taille des montaisons annuelles augmente, ce qui indique des effets de densité dépendance ou de saturation. Dans une montaison, les poissons plus grands ont généralement une incidence plus élevée de blessures que les poissons plus petits, ce qui laisse croire que les pinnipèdes ciblent les poissons plus grands ou alors capturent plus efficacement les plus petits. Ces résultats saisonniers et dépendants de la taille et de la densité amènent à croire que les effets des pinnipèdes diffèrent vraisemblablement beaucoup d'une population de salmonidés à une autre au sein du bassin versant du Columbia. Une meilleure compréhension de ces effets est requise pour orienter les stratégies de gestion et de conservation.[Traduit par la Rédacti...

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“…Adult Chinook salmon and steelhead were trapped for intragastric radio-tagging (Mellas and Haynes, 1985) during 2001 and 2002 in the adult fish facility, adjacent to the Washington-shore ladder at Bonneville Dam, and were implanted with radio-transmitters using the techniques described in Keefer et al (2004a). We tagged all fish regardless of minor injury or fin clip.…”

Section: Fish Trapping and Taggingmentioning

confidence: 99%

Experimental evaluation of fishway modifications on the passage behaviour of adult Chinook salmon and steelhead at Lower Granite Dam, Snake River, USA

Naughton

Caudill

Peery

et al. 2006

River Research & Apps

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Previous studies of Pacific salmonid passage over Snake River dams indicated slowed passage at transition pools, the transition area between the fishway entrance and the fish ladder. In 2001 and 2002, we conducted an experiment to determine if modified weirs affected adult salmon and steelhead passage times and route selection through the Lower Granite Dam transition pool. Fish attraction flows through the lower ladder weirs were experimentally increased using removable panels. During the experiment we monitored radio-tagged adult Chinook salmon and steelhead to determine passage routes and times through the transition pool. The weir treatment increased the number of spring-summer Chinook salmon passing straight through the transition pool compared to those exiting the transition pool to the collection channel or tailrace. Mean passage times through the transition pool differed among routes and were significantly lower during treatment periods for the exit-to-collection channel route in springsummer Chinook salmon, but not for other routes. Passage times among routes differed in steelhead, but there was no evidence of treatment effects on route use or passage time. Fall Chinook exhibited similar trends in route use and passage time to springsummer Chinook, but differences were not significant, perhaps because of relatively small sample size. Total dam passage times did not differ by treatment or route for any run. Fish depth during passage of the transition pool suggested that most fish passed through submerged orifices and supported the hypothesis that increased water velocity through these orifices caused the increase in straight-through passage in spring-summer Chinook. Collectively, the results suggested the weir modifications provided improvement to passage through the transition pool for spring-summer Chinook and no evidence of negative effects on other runs. The results from this study were used to develop new design criteria and modifications of the Lower Granite Dam fishway.

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Regurgitation Rates of Intragastric Radio Transmitters by Adult Chinook Salmon and Steelhead during Upstream Migration in the Columbia and Snake Rivers

Cited by 60 publications

References 11 publications

Experimental Evaluation of Adult Spring Chinook Salmon Radio‐Tagged during the Late Stages of Spawning Migration

Experimental Evaluation of Adult Spring Chinook Salmon Radio‐Tagged during the Late Stages of Spawning Migration

Influence of pinniped-caused injuries on the survival of adult Chinook salmon (Oncorhynchus tshawytscha) and steelhead trout (Oncorhynchus mykiss) in the Columbia River basin

Experimental evaluation of fishway modifications on the passage behaviour of adult Chinook salmon and steelhead at Lower Granite Dam, Snake River, USA

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