Pectoral Fin Morphology as a Reliable Field Sexing Characteristic in Populations of the Invasive Oriental Weatherfish (Misgurnus anguillicaudatus)

Urquhart, Alexander N.; Koetsier, Peter

doi:10.1643/ci-10-027

Cited by 7 publications

(5 citation statements)

References 14 publications

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“…They are freshwater fish that normally live between pieces of gravel/cobble. However, despite being bottom dwellers, C. biwae and M. anguillicaudatus were not found in the rock-ramp fishway because they prefer a fine sand bottom to a stony bottom and did not use the fishway as a habitat [88][89][90][91].…”

Section: Effects On Benthic Species and Species With Low Swimming Abi...mentioning

confidence: 97%

Effectiveness of New Rock-Ramp Fishway at Miyanaka Intake Dam Compared with Existing Large and Small Stair-Type Fishways

Masumoto

Nakai²,

Asaeda

et al. 2022

Water

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The migration of fish is influenced by the unique environmental characteristics of the destination and migratory habitat preferences. There are three fishways in Miyanaka Intake Dam. The rock-ramp fishway was newly established in 2012, creating an environment with different flow velocities and water depths. The purpose of this study was to investigate the effectiveness of the new rock-ramp fishway for native fish through two surveys. In the first survey, traps were installed during the survey period in all three fishways and all fish were caught. The run-up environment was quantified by measuring the flow velocity. In the second survey, fish were caught by spectrum methods upstream and downstream from the dam. It was found that bottom-dwelling fish and swimming fish not bound to the bottom with low migration abilities used the rock-ramp fishway for migration and as a habitat. After the new rock-ramp fishway was built, catches increased upstream from the dam. Further, the rock-ramp fishway is a potential habitat for certain species, such as Cottus pollux. As this is the first study to demonstrate the effectiveness of rock-ramp fishways, the research results are expected to be valuable to fishery managers and those planning river engineering projects.

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Section: Effects On Benthic Species and Species With Low Swimming Abi...mentioning

confidence: 97%

Effectiveness of New Rock-Ramp Fishway at Miyanaka Intake Dam Compared with Existing Large and Small Stair-Type Fishways

Masumoto

Nakai²,

Asaeda

et al. 2022

Water

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show abstract

“…Fishways for large varieties of fish have been tested based on the biological, hydraulic, and other physical parameters involved [46]. Coarse bed materials, such as rocks and boulders, are important for several bottom-dwelling fish species, as well as invertebrates [29,[47][48][49][50][51][52], and are suitable for the construction of rock-ramp fishways in addition to technical fishways [28].…”

Section: Introductionmentioning

confidence: 99%

Quantifying Vegetation on a Rock-Ramp Fishway for Fish Run-Up and Habitat Enhancement: The Case of the Miyanaka Intake Dam in Japan

Masumoto

Nakai²,

Aoki

et al. 2023

Water

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The Miyanaka Intake Dam fishway underwent improvements in 2012, and we established a new rock-ramp fishway called the Seseragi Fishway, cognizant of its utility as a passage and a habitat for bottom-dwelling and small fish with weak swimming ability. However, the fishway is occasionally submerged by floods, causing sediment accumulation that leads to changes in the vegetation composition. In addition, the arrival and inflow of seeds from upstream and the surrounding areas result in vegetation changes. In this study, the inside and outside of the rock-ramp fishway were divided into eight areas, and the vegetation succession after 2012 was determined. A correlation was observed between the results of fish catch surveys during the same period and the vegetation. Based on these results, we reported on the process of steadily operating the rock-ramp fishway while devising and improving specific management methods. Changes in vegetation, such as an increase in upright vegetation and a decrease in flow-obstructing vegetation, contributed to an increase in the population of bottom-dwellers, weak swimmers, and juvenile fish. The existence and management of appropriate vegetation are important for maintaining fishways inhabited by a variety of fish species.

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“…1976; Lebeau and Pageau 1989; Dub et al. 2017), adipose fin size (Beacham and Murray 1983), pectoral fin morphology (Urquhart and Koetsier 2011; Wolf et al. 2018), head size (Kitano et al.…”

mentioning

confidence: 99%

“…In some cases, it might be possible to express eggs or milt (Hanson et al 2008). External features such as urogenital morphology (Casselman 1974;Norton et al 1976;Lebeau and Pageau 1989;Dub et al 2017), adipose fin size (Beacham and Murray 1983), pectoral fin morphology (Urquhart and Koetsier 2011;Wolf et al 2018), head size (Kitano et al 2007), and body shape (Snow 1963) have also been used to assign sex. However, sex assignment strategies tend to be species-specific and dependent on season and whether individuals are actively spawning (Hanson et al 2008).…”

mentioning

confidence: 99%

Using Pectoral Fin Ridges to Assign Sex to Bighead Carp

Lederman

Love

Anderson

et al. 2022

N American J Fish Manag

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Bighead Carp Hypophthalmichthys nobilis are native to eastern Asia, have been introduced throughout the world, and are subjected to immense management where they persist. Identifying the sex of Bighead Carp during monitoring efforts could provide additional data to enhance fishery management schemes, thereby facilitating better management. We assessed the presence (male) or absence (female) of bony ctenoid serrations on the upper edge of the foremost pectoral fin ray to noninvasively and nonlethally determine the sex of 745 Bighead Carp collected from March to December. Bighead Carp sex was correctly assigned 93% of the time by three readers, with males correctly identified 94% of the time and females 92% of the time. A generalized linear model indicated that total length and water temperature influence the success of sex assignment. Overall effects of water temperature and size were relatively low, as the pectoral fin method was highly accurate (93%) and precise (88% agreement among readers). Thus, the pectoral fin method provides reliable Bighead Carp sex assignment that can be used on wild-caught fish to noninvasively and rapidly assign sex in the field or lab.

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Pectoral Fin Morphology as a Reliable Field Sexing Characteristic in Populations of the Invasive Oriental Weatherfish (Misgurnus anguillicaudatus)

Cited by 7 publications

References 14 publications

Effectiveness of New Rock-Ramp Fishway at Miyanaka Intake Dam Compared with Existing Large and Small Stair-Type Fishways

Effectiveness of New Rock-Ramp Fishway at Miyanaka Intake Dam Compared with Existing Large and Small Stair-Type Fishways

Quantifying Vegetation on a Rock-Ramp Fishway for Fish Run-Up and Habitat Enhancement: The Case of the Miyanaka Intake Dam in Japan

Using Pectoral Fin Ridges to Assign Sex to Bighead Carp

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