Examining the effects of authentic C&amp;R on the reproductive potential of Northern pike

Flink, Henrik; Nordahl, Oscar; Hall, Marcus; Rarysson, Anton; Bergström, Kristofer; Larsson, Per; Petersson, Erik; Merilä, Juha; Tibblin, Petter

doi:10.1016/j.fishres.2021.106068

Cited by 7 publications

(2 citation statements)

References 59 publications

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“…Each treatment was replicated 20 times. females (mean ± SD; 73 ± 4.6 cm) and five males (mean ± SD; 61.5 ± 7.1 cm), captured with fyke-nets during spawning migration to the stream Lerviksbäcken (57 • 04'22.8"N 16 • 31'18.4"E), and artificially fertilizing the gametes according to an established protocol (Flink et al, 2021; outlined in detail by Sunde et al, 2018). In short, gametes (about 20 ml eggs from females, 1 ml milt from males) were dry stripped from the parental fish and brought to the Linnaeus University laboratory where fertilization were conducted by mixing gametes (each female were fertilized by multiple males to improve fertilization rate) and adding freshwater to induce fertilization.…”

Section: Tablementioning

confidence: 99%

The role of chemical communication in the predator-prey role reversal of northern pike (Esox lucius) and three-spined stickleback (Gasterosteus aculeatus)

Münnich

Hoppmann²,

Berggren³

et al. 2023

Fisheries Research

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Section: Tablementioning

confidence: 99%

The role of chemical communication in the predator-prey role reversal of northern pike (Esox lucius) and three-spined stickleback (Gasterosteus aculeatus)

Münnich

Hoppmann²,

Berggren³

et al. 2023

Fisheries Research

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“…Many families of freshwater fish have presently been studied in the context of C&R such as centrarchids (Elliott et al 2021;LaRochelle et al 2021), esocids (Flink et al 2021;Somers et al 2021), percids (Twardek et al 2018b;Logan et al 2019), and salmonids (Thorstad et al 2019;Joubert et al 2020;. More uncommon families such as acipenserids (Mullen et al 2020) and sciaenids (Card and Hasler 2021) are also being studied, yet the volume of research is still emerging.…”

Section: Catch-and-release Anglingmentioning

confidence: 99%

hysiological and Behavioural Responses of Lake Trout to Catch-And-Release Angling

Howell

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Lake trout (Salvelinus namaycush), like many other native fishes in North America are a popular species typically targeted for recreational angling. Catch-and-release angling (C&R) relies on the assumption of high fish survival following release and is considered an effective way to preserve wild stocks of fish. Salmonids and other related species are susceptible to recreational angling, which can induce stress during different parts of the process (e.g., line fighting and air exposure). Other factors can impact fish health (e.g., water temperature and hooking location) and potentially lead to delayed mortality. In this thesis, I present empirical research where I used reflex impairment, physiology, and overall activity to assess the robustness of lake trout to C&R across seasons and time scales. During ice angling, lake trout experienced signs of reflex and physiological impairment up to 6 h and a high mortality rate. A key finding was that lake trout may exhibit pressure-related injuries in cooler water temperatures despite being physostomous. During open water angling, lake trout experienced barotrauma, reflex impairment, and physiological impairment immediately upon capture and 0.5 h post-angling. The addition of post-release activity monitoring via tri-axial accelerometry showed that lake trout rapidly swim to depth and exhibit reduced activity for the first 14 min after release. Collectively, I demonstrate that using multiple metrics of assessing angling-related impairment (i.e., both external and internal metrics) is necessary and future studies should not rely on one or few indices. The work presented here provides new information regarding context-specific aspects of C&R and is useful for recreational fisheries management.

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Higher abundance of adult pike in Baltic Sea coastal areas adjacent to restored wetlands compared to reference bays

et al. 2023

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The abundance of pike, a keystone top-predator, have declined dramatically in the Baltic Sea since the 1990s likely owing to recruitment failure. It has been proposed that wetland restoration can aid the recovery of the pike stock by increasing the number of recruits produced by anadromous populations. Yet, no previous studies have addressed whether wetland restorations are associated with higher abundances of adult pike in the coastal habitat. To address this, we performed standardised rod-and-reel survey fishing in paired bays with and without wetlands across three coastal areas and 3 years. To estimate dispersal and the contribution of wetland pike to the coastal stock, we tagged captured pike with passive integrated responders (PIT) and employed PIT reader stations in wetland inlets. The results showed that pike abundances were on average 90% higher in bays with an adjacent wetland although the effect varied among areas. Moreover, PIT-data uncovered that wetland pike constituted a high proportion of the pike found in adjacent coastal habitats and that some wetland fish dispersed up to 10 km. These results support that wetland restoration is a valuable tool to aid the coastal pike stock and ultimately restore the function and services of the coastal ecosystem.

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Examining the effects of authentic C&R on the reproductive potential of Northern pike

Cited by 7 publications

References 59 publications

The role of chemical communication in the predator-prey role reversal of northern pike (Esox lucius) and three-spined stickleback (Gasterosteus aculeatus)

The role of chemical communication in the predator-prey role reversal of northern pike (Esox lucius) and three-spined stickleback (Gasterosteus aculeatus)

hysiological and Behavioural Responses of Lake Trout to Catch-And-Release Angling

Higher abundance of adult pike in Baltic Sea coastal areas adjacent to restored wetlands compared to reference bays

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