Weirs help us to establish those baselines and then detect changes in populations over time. They also help fisheries managers evaluate and adjust their management actions, reconstruct past salmon abundances, and forecast future salmon returns.

A fishing weir, fish weir, fishgarth [1] or kiddle [2] is an obstruction placed in tidal waters, or wholly or partially across a river, to direct the passage of, or trap fish. A weir may be used to trap marine fish in the intertidal zone as the tide recedes, fish such as salmon as they attempt to swim upstream to breed in a river, or eels as ...

A fish weir, a long "fence", stretches across the Russian River, enabling Alaska Fish & Game technicians and biologists to study migrating salmon as they move upriver. Fish weirs have been used to capture fish since prehistoric times.

2024年1月13日 · Weirs demonstrated limited efficacy in removing hatchery fall Chinook Salmon from wild spawning areas and were associated with negative impacts on spawner distribution and productivity, raising the possibility that alternative approaches will be needed to reduce the effects of hatcheries on wild populations.

2017年11月4日 · Alaska’s largest subsistence harvest of Chinook Salmon is taken from its waters each year. Tour the Kwethluk River weir with our staff and learn more about how weirs help us manage salmon for...

2022年1月7日 · In historic terms, a weir is a fish trap made of logs, wooden stakes, or stones that corral salmon into traps. The first Alaska legislature banned these kinds of weirs in was one of its first acts in 1959. The goal was to guarantee public fishery access.

2023年8月14日 · The South Fork Toutle weir will allow fishery managers to reduce the number of “hatchery-origin” — fish reared in hatcheries — Chinook salmon making their way to the upstream spawning grounds,...

Weirs—which function as porous barriers built across stream—have long been used to capture migrating fish in flowing waters. For example, the Netsilik peoples of northern Canada used V-shaped weirs constructed of river rocks gathered onsite to capture migrating Arctic char Salvelinus alpinus (Balikci 1970).

2018年4月16日 · Spring salmon can be caught in the fishery at Galway City from the month of February and the best grilse fishing is from late May, throughout June and well into July. Salmon fishing continues throughout the season from the Weir at Galway City as far as Lough Corrib. Evening fishing starts on April 1st until September 30th.

2017年7月18日 · Salmon weirs have been used for at least 5000 years as an effective means of selective harvest and management (Moss and Erlandson 1998). Our findings highlight the utility and feasibility of using traditional-style salmon weirs for some monitoring applications, particularly in smaller rivers with relatively stable hydrographs.