Integrating environmental characteristics and fisheries management in Northern Finland river impoundments

Teppo Vehanen, Juha Riihimäki

Research output: Contribution to journalArticleScientificpeer-review

9 Citations (Scopus)

Abstract

Three large rivers in northern Finland, the Kemijoki, Iijoki, and Oulujoki rivers, were dammed for hydropower generation in the 1940s-1960s. Due to differences in environmental conditions, these impoundments require detailed study to produce guidelines for fisheries management. Water quality, hydrology, vegetation, and geomorphology data of 16 impoundments were gathered. Shoreline landuse data were derived from maps, and fish assemblage data were collected by exploratory fishing and from the annual fishery statistics. The relations among environmental variables were studied, and a classification of the impoundments was developed by hierarchical cluster analysis. Consequently, three impoundment groups with different environmental characteristics were formed. Significant differences among impoundment groups were also detected in fish yield. We conclude that the variation in environmental conditions, together with differences in fish communities in the impoundments were important enough to justify the claim that impoundments of different types require different management strategies.
Original languageEnglish
Pages (from-to)551-558
Number of pages8
JournalEnvironmental Management
Volume23
Issue number4
DOIs
Publication statusPublished - 1999
MoE publication typeA1 Journal article-refereed

Fingerprint

Fisheries
impoundment
fishery management
Fish
Rivers
river
Geomorphology
Hydrology
Cluster analysis
Water quality
Statistics
fish
fishery statistics
environmental conditions
geomorphology
cluster analysis
shoreline
fishing
hydrology
water quality

Keywords

  • impoundments
  • river regulation
  • fish assemlage
  • water quality
  • aquatic vegetation
  • Finland

Cite this

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title = "Integrating environmental characteristics and fisheries management in Northern Finland river impoundments",
abstract = "Three large rivers in northern Finland, the Kemijoki, Iijoki, and Oulujoki rivers, were dammed for hydropower generation in the 1940s-1960s. Due to differences in environmental conditions, these impoundments require detailed study to produce guidelines for fisheries management. Water quality, hydrology, vegetation, and geomorphology data of 16 impoundments were gathered. Shoreline landuse data were derived from maps, and fish assemblage data were collected by exploratory fishing and from the annual fishery statistics. The relations among environmental variables were studied, and a classification of the impoundments was developed by hierarchical cluster analysis. Consequently, three impoundment groups with different environmental characteristics were formed. Significant differences among impoundment groups were also detected in fish yield. We conclude that the variation in environmental conditions, together with differences in fish communities in the impoundments were important enough to justify the claim that impoundments of different types require different management strategies.",
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Integrating environmental characteristics and fisheries management in Northern Finland river impoundments. / Vehanen, Teppo; Riihimäki, Juha.

In: Environmental Management, Vol. 23, No. 4, 1999, p. 551-558.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Integrating environmental characteristics and fisheries management in Northern Finland river impoundments

AU - Vehanen, Teppo

AU - Riihimäki, Juha

PY - 1999

Y1 - 1999

N2 - Three large rivers in northern Finland, the Kemijoki, Iijoki, and Oulujoki rivers, were dammed for hydropower generation in the 1940s-1960s. Due to differences in environmental conditions, these impoundments require detailed study to produce guidelines for fisheries management. Water quality, hydrology, vegetation, and geomorphology data of 16 impoundments were gathered. Shoreline landuse data were derived from maps, and fish assemblage data were collected by exploratory fishing and from the annual fishery statistics. The relations among environmental variables were studied, and a classification of the impoundments was developed by hierarchical cluster analysis. Consequently, three impoundment groups with different environmental characteristics were formed. Significant differences among impoundment groups were also detected in fish yield. We conclude that the variation in environmental conditions, together with differences in fish communities in the impoundments were important enough to justify the claim that impoundments of different types require different management strategies.

AB - Three large rivers in northern Finland, the Kemijoki, Iijoki, and Oulujoki rivers, were dammed for hydropower generation in the 1940s-1960s. Due to differences in environmental conditions, these impoundments require detailed study to produce guidelines for fisheries management. Water quality, hydrology, vegetation, and geomorphology data of 16 impoundments were gathered. Shoreline landuse data were derived from maps, and fish assemblage data were collected by exploratory fishing and from the annual fishery statistics. The relations among environmental variables were studied, and a classification of the impoundments was developed by hierarchical cluster analysis. Consequently, three impoundment groups with different environmental characteristics were formed. Significant differences among impoundment groups were also detected in fish yield. We conclude that the variation in environmental conditions, together with differences in fish communities in the impoundments were important enough to justify the claim that impoundments of different types require different management strategies.

KW - impoundments

KW - river regulation

KW - fish assemlage

KW - water quality

KW - aquatic vegetation

KW - Finland

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