ISSN 0003-455X
© Finnish Zoological and Botanical Publishing Board 1986

Contents of Volume 23 Number 1, 1986

Pankakoski, E. & Nurmi, K. 1986: Skull morphology of Finnish muskrats: geographic variation. age differences and sexual dimorphism. — Annales Zoologici Fennici 23: 1–32.
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Markkula, I. 1986: Comparison of the communities of the oribatids (Acari: Cryptostigmata) of virgin and forest-ameliorated pine bogs. — Annales Zoologici Fennici 23: 33–38.
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Nilsson, A. N. 1986: Community structure of the Dytiscidae (Coleoptera) of a northern Swedish seasonal pond. — Annales Zoologici Fennici 23: 39–47.
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Rask, M. 1986: The diet and diel feeding activity of perch, Perca fluviatilis L., in a small lake in southern Finland. — Annales Zoologici Fennici 23: 49–56.
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Nilsson, C. 1986: The occurrence of lost and malformed legs in mayfly nymphs as a result of predator attacks. — Annales Zoologici Fennici 23: 57–60.
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Sunila, I. 1986: Histopathological changes in the mussel Mytilus edulis L. at the outlet from a titanium dioxide plant in Northern Baltic. — Annales Zoologici Fennici 23: 61–70.
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Pekkarinen, M. 1986: Notes on the spawning, egg cleavage and early larval development of the bivalve Macoma balthica. — Annales Zoologici Fennici 23: 71–75.
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Pekkarinen, M. 1986: Histology of the siphons of Macoma balthica (Bivalvia: Tellinidae). — Annales Zoologici Fennici 23: 77–95.
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