Changed length-at-age of burbot, Lota lota, from an acidified estuary in the Gulf of Bothnia

Kjellman, Jakob; Hudd, Richard

doi:10.1007/bf00000628

Cited by 13 publications

(8 citation statements)

References 1 publication

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“…DISCUSSION Burbot in all the studied lakes, except Ring Lake, appeared to be relatively short lived compared to other North American waters. Infrequent capture of old burbot is common in heavily exploited fisheries (Kjellman and Hudd 1996).…”

Section: Resultsmentioning

confidence: 99%

Assessment of Lentic Burbot Populations in the Big Horn/Wind River Drainage, Wyoming

Krueger

Hubert

1997

Journal of Freshwater Ecology

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We sampled burbot in seven lakes in the Big Horn/Wind River drainage of Wyoming in 1995 and 1996. We assessed the age frequency distributions, length frequency distributions, growth rates, relative weights, and catch per unit effort of the burbot populations in these lakes and compared them to burbot populations across North America. The habitat in the three natural lakes did not appear to be limiting the growth or reproduction of burbot, but exploitation seemed to be affecting population structure and the abundance of sexually mature fish. Abundance of burbot was low in the four man-made lakes where sediment deposition and water level fluctuations were probably limiting spawning success, survival of young fish, and prey abundance.

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Section: Resultsmentioning

confidence: 99%

Assessment of Lentic Burbot Populations in the Big Horn/Wind River Drainage, Wyoming

Krueger

Hubert

1997

Journal of Freshwater Ecology

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“…One possible explanation to the extremely high growth rates in SB may be simultaneous fluctuations in both burbot and potential prey species population densities, which in combination have been shown to increase mean length-at-age (Kjellman & Hudd 1996). This fast growth rate of SB burbot is also evidenced by low age and large size at first reproduction.…”

Section: Considerations About Sr:ca Datamentioning

confidence: 99%

Life history of anadromous burbot (Lota lota, Linneaus) in the brackish Baltic Sea inferred from otolith microchemistry

Rohtla

Vetemaa

Taal

et al. 2013

Ecology of Freshwater Fish

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Strontium to calcium (Sr:Ca) and barium to calcium (Ba:Ca) ratios were quantified in 74 otoliths of brackish water-living burbot Lota lota, collected from two regions in the eastern Baltic Sea. Considerable amount of life history plasticity was observed. Ninety-six per cent of analysed burbot were of freshwater origin; only three specimens displayed signs of hatching in low-salinity (1-2) estuarine environment. Most of the juveniles emigrated from freshwater during late winter and spring the next year after birth, while nine individuals did so at the age of 2-3 months. Age and length at maturity (as determined by first freshwater spawning migration) varied from 2-6 years and 189-540 mm, respectively, with most of burbot maturing during the second or third year of life. It is hypothesised that the bulk juvenile downstream migration is triggered by high-flow conditions as evidenced by Ba: Ca peak around the point of freshwater exit. This study provides new information on burbot life history.

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“…This is in the magnitude of ten times more than the corresponding discharge from the entire Finnish industry. The inevitable result of this stress is extensive and serious hydrobiological damage (Kjellman andHudd 1996, Hudd 2000).…”

Section: Introductionmentioning

confidence: 99%

Hydrochemistry of rivers in an acid sulphate soil hotspot area in western Finland

Roos¹,

Åström²

2008

AFSci

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During heavy rains and snow melting, acid sulphate (AS) soils on the coastal plains of Finland are flushed resulting in discharge of acidic and metal-rich waters that strongly affect small streams. In this study, the impact of AS soils occurrence and hydrological changes on water quality were determined for 21 rivers (catchment sizes between 96-4122 km 2 ) running through an AS soil hotspot area in western central Finland. Water samples, collected at the outlet, during eight selected events, were analysed for pH, dissolved organic carbon, electrical conductivity (EC) and 32 chemical elements. Based on the correlation with percentage arable land in the catchments (a rough estimate of AS soil occurrences, as up to 50% of the arable land is underlain with these soils), it was possible to categorize variables into those that are enriched in runoff from such land, depleted in runoff from such land (only one element), and not affected by land-use type in the catchments. Of the variables enriched in runoff from arable land, some were leached from AS soils during high-water flows, in particular (aluminium, boron, beryllium, cadmium, cobalt, copper, lithium, manganese, nickel, sulphur, silicon, thorium, thallium, uranium, and zinc) and others occurred in highest concentrations during lower flows (calcium, EC, potassium, magnesium, sodium, rubidium and strontium). Molybdenum and phosphorus were not leached from AS soils in larger amounts than from other soils and thus related to other factors connected to the arable land. Based on the concentrations of potentially toxic metals derived from AS soils, the 21 rivers were ranked from the least (Lestijoki River, Lapväärtinjoki River and Perhonjoki River) to the most (Sulvanjoki River, Vöyrinjoki River and Maalahdenjoki River) heavily AS soil impacted. It has been decided that Vöyrinjoki is to be dredged along a ca. 20 km distance. This is quite alarming considering the high metal concentrations in the river.

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Changed length-at-age of burbot, Lota lota, from an acidified estuary in the Gulf of Bothnia

Cited by 13 publications

References 1 publication

Assessment of Lentic Burbot Populations in the Big Horn/Wind River Drainage, Wyoming

Assessment of Lentic Burbot Populations in the Big Horn/Wind River Drainage, Wyoming

Life history of anadromous burbot (Lota lota, Linneaus) in the brackish Baltic Sea inferred from otolith microchemistry

Hydrochemistry of rivers in an acid sulphate soil hotspot area in western Finland

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