Movement and Population Size of American Shad near a Low-Head Lock and Dam

Bailey, Michael M.; Isely, J. Jeffery; Bridges, William C.

doi:10.1577/03-025

Cited by 31 publications

(48 citation statements)

References 8 publications

(1 reference statement)

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“…Varying methods have been used to determine whether ''fallback'' fish will be included in data analyses including eventual return upstream (Beasley & Hightower, 2000;Moser et al, 2000;Hightower & Sparks, 2003;Bailey et al, 2004;Olney et al, 2006) or movement within a specified time period (Chappelear & Cooke, 1994). The majority of alosine telemetry literature include fish in the analyses that eventually resume upstream migration after initial downstream movements.…”

Section: Discussionmentioning

confidence: 99%

“…Tracking within-river movements of spawning adults of the genus Alosa is of special interest to many researchers and management agencies. Because anadromous shad and herring are sensitive to handling, researchers often use ''fallback'' (i.e., downstream movement of an upstream migrating anadromous fish following tagging) as a behavioral bioassay to document adverse tag effects on alosines (Beasley & Hightower, 2000;Hightower & Sparks, 2003;Bailey et al, 2004;Olney et al, 2006). Here, we use a literature review to show that the present language describing downstream movements is not standardized.…”

Section: Introductionmentioning

confidence: 99%

“…In the literature, many features of existing tagging studies on anadromous shad and herring are similar (Dodson et al, 1972;Bell & Kynard, 1985;Barry & Kynard, 1986;Chappelear & Cooke, 1994;Beasley & Hightower, 2000;Moser et al, 2000;Hightower & Sparks, 2003;Acolas et al, 2004;Bailey et al, 2004;Sprankle, 2005;Olney et al, 2006; Table 1). Of these, 81.8% focused on American shad (Alosa sapidissima), 9.1% examined blueback herring (A. aestivalis), and 9.1% used Allis shad (A. alosa).…”

Section: Introductionmentioning

confidence: 99%

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What is “fallback”?: metrics needed to assess telemetry tag effects on anadromous fish behavior

et al. 2009

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Telemetry has allowed researchers to document the upstream migrations of anadromous fish in freshwater. In many anadromous alosine telemetry studies, researchers use downstream movements (''fallback'') as a behavioral field bioassay for adverse tag effects. However, these downstream movements have not been uniformly reported or interpreted. We quantified movement trajectories of radio-tagged anadromous alewives (Alosa pseudoharengus) in the Ipswich River, Massachusetts (USA) and tested blood chemistry of tagged and untagged fish held 24 h. A diverse repertoire of movements was observed, which could be quantified using (a) direction of initial movements, (b) timing, and (c) characteristics of bouts of coupled upstream and downstream movements (e.g., direction, distance, duration, and speed). Because downstream movements of individual fish were almost always made in combination with upstream movements, these should be examined together. Several of the movement patterns described here could fall under the traditional definition of ''fallback'' but were not necessarily aberrant. Because superficially similar movements could have quite different interpretations, post-tagging trajectories need more precise definitions. The set of metrics we propose here will help quantify tag effects in the field, and provide the basis for a conceptual framework that helps define the complicated behaviors seen in telemetry studies on alewives and other fish in the field.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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What is “fallback”?: metrics needed to assess telemetry tag effects on anadromous fish behavior

et al. 2009

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“…Fallback is defined as the downstream movement of an upstream migrating anadromous fish following tagging ) and is used as a behavioral bioassay of adverse tag effects on alosines (Beasley and Hightower 2000;Hightower and Sparks 2003;Bailey et al 2004;Olney et al 2006). Once identified, fallback duration was calculated for both Alewives and Blueback Herring as the number of days until continuous up-river movement was observed.…”

Section: Methodsmentioning

confidence: 99%

“…Other alosine tagging studies (Chappelear and Cooke 1994;Acolas et al 2004;Bailey et al 2004; Castro-Santos and Vono 2013) report high tag retention rates (>95%) when using gastric implantation methods. Five of the six tagged fish that disappeared during the study occurred in areas of heavy harvest from both commercial and recreational fishers.…”

Section: Posttagging Behaviormentioning

confidence: 95%

Handling and Tagging Effects, In‐River Residence Time, and Postspawn Migration of Anadromous River Herring in the Hudson River, New York

Eakin

2017

Mar Coast Fish

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In a 2013 pilot study, acoustic tags were inserted into two species of river herring, Alewife Alosa pseudoharengus and Blueback Herring Alosa aestivalis. The primary objectives were to identify handling and tagging effects and assess inriver residence time. The secondary objective was to identify postspawn coastal migration patterns. Fish were collected on spawning grounds in the upper portion of the Hudson River, New York. Vemco V7 acoustic transmitters were gastrically inserted into 25 river herring (13 Alewives and 12 Blueback Herring) that were in pre, active, or post spawning conditions. In-river acoustic data were collected from 23 of the 25 river herring. The majority of tagged fish exhibited some level of fallback (downstream migration) after the tagging event, all Blueback Herring and all male Alewives returning to spawning areas. The majority of female Alewives did not return to the spawning area after tagging, and this may be a result of when and where tagging events occurred. Both species of river herring exhibited similar in-river residence times of approximately 2-3 weeks and exited the system 3-6 d after spawning. Information on coastal movements of four Blueback Herring (two females and two males) was also obtained, spanning the south shore of Long Island, New York, to the mouth of Penobscot Bay, Maine. Coastal and in-river tag detections were reported by members of the Atlantic Cooperative Telemetry Network. In conclusion, this experiment can now be repeated with confidence on a larger scale with multiyear tags in order to identify unknown in-river spawning areas, provide information regarding spawning site fidelity, and bolster current knowledge of coastal migration patterns for both species.

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Surgical Implantation of Acoustic Tags in American Shad to Resolve Riverine and Marine Restoration Challenges

Gahagan¹,

Bailey

2020

Mar Coast Fish

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A variety of data needs challenge the successful restoration and management of alosine populations, including information on the migration, mortality, behavior, demographic rates, and distribution of fish, both in riverine and marine environments. Radiotelemetry with gastric-implanted transmitters has typically been used to answer some of these questions; however, observing alosines over extended periods and in the marine environment has remained beyond the limitations of this technology and implantation technique. To address these issues, we conducted an acoustic telemetry study on American Shad Alosa sapidissima by using surgical implantation methods. We tagged fish during 2015 (n = 46) and 2016 (n = 52) in the Charles River, Massachusetts, an urbanized watershed where American Shad were believed to be extirpated prior to restoration efforts beginning in 2006. Surgical implantation produced rates of in-river mortality (40% overall) and posttagging fallback (39% overall) that were comparable to those from traditionally used gastric implantation methods. Data from American Shad that were retained for statistical analyses (n = 59) demonstrated that Watertown Dam (at river kilometer 14.3) impeded upstream migration and that New Boston Dam and Locks (at the mouth of the river) delayed postspawn emigration from the river. In total, 49 American Shad were detected outside of the Charles River. The distribution and low number of total detections, despite a large number of nearshore arrays, suggest that American Shad occupy waters farther offshore during their marine phase. American Shad were detected as overwintering on the Scotian Shelf (n = 5) and the Mid-Atlantic Bight (n = 1). In 2017, 10 of the individuals that were tagged in 2016 returned to spawn, providing the first reported data on total migration timing and migratory behavior free of handling effects. Surgical implantation of acoustic telemetry tags is an effective method that can provide necessary and previously unattainable data on a species of conservation need. Modern restoration efforts begin with a basic understanding of the biology and ecology of populations as a whole. These fundamental building blocks are difficult to obtain when dealing with highly migratory populations in which individuals move across varied habitats and multiple management regimes. Anadromous fish populations are notable both for their highly variable migratory patterns and for the large reduction in their population sizes over the last 200 years (Limburg and Waldman 2009; Hall et al. 2012). Management and restoration of

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Movement and Population Size of American Shad near a Low-Head Lock and Dam

Cited by 31 publications

References 8 publications

What is “fallback”?: metrics needed to assess telemetry tag effects on anadromous fish behavior

What is “fallback”?: metrics needed to assess telemetry tag effects on anadromous fish behavior

Handling and Tagging Effects, In‐River Residence Time, and Postspawn Migration of Anadromous River Herring in the Hudson River, New York

Surgical Implantation of Acoustic Tags in American Shad to Resolve Riverine and Marine Restoration Challenges

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