Distribution and Abundance of European River Lamprey (<i>Lampetra fluviatilis</i>) Larvae in Three Rivers Running into Bothnian Bay, Finland

Kainua, K.; Valtonen, Tapani

doi:10.1139/f80-236

Cited by 28 publications

(25 citation statements)

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“…The main reasons for the decrease are the building of hydroelectric power plants, and the short-term regulation and dredging of rivers. As a result, suitable spawning and nursery habitats for lampreys have decreased; this resulted in a reduction in the number of mature lampreys migrating upstream (Kainua & Valtonen 1980, Eklund et al 1984.…”

Section: Discussionmentioning

confidence: 99%

“…This pattern was also observed by Sterner (1918) and Imam et al (1958) who investi-241 Thiel et al (2005) gated lamprey catches in rivers flowing into the North Sea. Kelly & King (2001) did not mention fisheries but instead concluded that populations of anadromous lampreys have declined in European inland waters mainly due to pollution, the construction of dams (associated with hydroelectric power stations), weirs and other manmade barriers in rivers, channelisation and land-management practices that have led to increased siltation on spawning gravels (Hunn & Youngs 1980, Kainua & Valtonen 1980, Valtonen 1980, Eklund et al 1984, Witkowski 1992, Ojutkangas et al 1995, Meyer & Brunken 1997. In German inland waters, Imam et al (1958), Wilkens & Köhler (1977), Möller (1984), Thiel & Salewski (2003), Krappe (2004) and Spratte (2004) observed a considerable decrease in anadromous lamprey populations during the mid 1950s.…”

Section: Discussionmentioning

confidence: 99%

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Endangered anadromous lampreys in the southern Baltic Sea: spatial distribution, long-term trend, population status

Thiel¹,

Winkler²,

Riel³

et al. 2009

Endang. Species. Res.

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We analysed ~310 records of river lampreys Lampetra fluviatilis (Linnaeus, 1758) (~19 977 663 specimens) and 54 records of sea lampreys Petromyzon marinus Linnaeus, 1758 (~86 specimens) for the southern parts of ICES Subdivisions 22 and 24 to 26 in the Baltic Sea covering the period 1649 to 2005. Most sea lamprey records came from Subdivisions 22 and 24. The majority of river lamprey records stem from Subdivisions 24 and 26. We found no distinct temporal trend for sea lamprey stock development. However, a long-term trend showing decreasing catches of river lamprey was detected, indicating a stock decrease of this species from 1887 to 1999. The largest numbers of lamprey (largely river lamprey but may include some sea lamprey as species were not distinguished in the past) were caught in the period 1890 to 1919. Approximately 82% of the total lamprey catch in our study area was made in Subdivision 26. Roughly 65.3% of the mean annual yield of lampreys came from the lower Vistula River, the Vistula Lagoon and the Bay of Gdań sk. The river lamprey was mainly distributed in estuarine and coastal marine areas. Offshore records of sea lamprey were also rare. From 1990 to 2005, most river lamprey records and recorded individuals originated from the Szczecin Lagoon and its adjacent waters, demonstrating the present importance of these waters for their spawning migrations. Of 9 known river lamprey spawning sites, 5 were found in the Peene River system which flows into the Szczecin Lagoon. At present, no sea lamprey reproduction site is known from rivers of the German Baltic Sea area. A rebuilding programme is required for the river lamprey; this should definitely contain measures to restore lost spawning sites and the connectivities within the river systems where spawning populations still occur. Protected areas in estuarine waters with important lamprey migration routes may be an additional measure for the conservation of these anadromous species.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Endangered anadromous lampreys in the southern Baltic Sea: spatial distribution, long-term trend, population status

Thiel¹,

Winkler²,

Riel³

et al. 2009

Endang. Species. Res.

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“…The substrate composition is recognized as one of the most important factors limiting the distribution of ammocoetes (e.g. Beamish and Jebbink, 1994;Kainua and Valtonen, 1980;Malmqvist, 1980;Morman et al, 1980). In order to evaluate the importance of this parameter at a macrospatial scale, two substrate related variables were used.…”

Section: Environmental Predictorsmentioning

confidence: 99%

Influence of macrohabitat preferences on the distribution of European brook and river lampreys: Implications for conservation and management

Ferreira¹,

Quintella²,

Maia³

et al. 2013

Biological Conservation

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a b s t r a c tThe European river lamprey, Lampetra fluviatilis (L.), and the European brook lamprey, Lampetra planeri (Bloch, 1784), are considered highly threatened in Portugal. However, the lack of information about the ecology and distribution of these species poses difficulties to the identification of concrete actions directed to their conservation. A total of 401 sampling sites, randomly distributed throughout the entire Portuguese mainland territory were selected, and Lampetra sp. ammocoetes presence or absence checked with electrofishing. These data, together with 11 macrohabitat predictors, were analyzed using Boosted Regression Trees (BRTs). The BRT models consistently identified five environmental variables as the most important for predicting the distribution of European brook and river lamprey ammocoetes: altitude, distance to coast, sand, maximum temperature of the warmest month and precipitation of the driest month. The relationships of these variables with the species probability of occurrence suggest that lampreys occur in low altitude river stretches (<170 m), relatively close to the coast (<150 km) and with a sandy substrate (>70% sand). In addition, intermediate values of temperature and precipitation were also found to have a positive correlation with the species occurrence. A map with the probability of occurrence of Lampetra sp. in Portugal was generated and stretches of rivers were delimited with different conservation priorities. Rivers classified with the highest level of conservation priority were considered to be proposed as Special Areas of Conservation, under the Natura 2000 Networking Programme.

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“…These include use of a shovel or suction dredge to remove lamprey from the sediment (Kainua and Valtonen 1980;Beamish and Youson 1987;Ojutkangas et al 1995) or towed nets to collect both migrating ammocoetes and macrophthalmia (Heard 1966;Beamish and Youson 1987;Beamish and Levings 1991;Gadomski and Barfoot 1998). Lee and Weise (1989) used a manned submersible to visually quantify lamprey in deep lentic habitats.…”

Section: Juvenilesmentioning

confidence: 99%

Capture and collection of lampreys: the state of the science

Moser

Butzerin

Dey

2007

Rev Fish Biol Fisheries

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The need for native lamprey conservation, improved lamprey fishery management, and better assessment of non-indigenous lamprey control measures has resulted in increased effort to survey lamprey populations and assess their status. Depending on the study objectives and target species/life stage, collection methods vary dramatically. We therefore provide a comprehensive review of sampling considerations and techniques used to capture, collect, handle, and enumerate both juvenile and adult lamprey life stages. Surveys for lamprey are often constrained by the lack of basic biological information, such as reliable characters for field identification of larvae (ammocoetes), migratory timing of anadromous forms, and spawning/nest building behavior of adults. However, there are a number of studies that have documented habitat preferences of the relatively sedentary ammocoetes. Consequently, existing sampling protocols have focused on the development of stratified sampling that targets optimal ammocoete habitat. In addition to this approach, we discuss methods and gear that can be used to survey migratory life stages, lamprey nests, and difficult-to-sample, deepwater ammocoete habitats.

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Distribution and Abundance of European River Lamprey (Lampetra fluviatilis) Larvae in Three Rivers Running into Bothnian Bay, Finland

Cited by 28 publications

References 0 publications

Endangered anadromous lampreys in the southern Baltic Sea: spatial distribution, long-term trend, population status

Endangered anadromous lampreys in the southern Baltic Sea: spatial distribution, long-term trend, population status

Influence of macrohabitat preferences on the distribution of European brook and river lampreys: Implications for conservation and management

Capture and collection of lampreys: the state of the science

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