Search Results - "Halkka, Olli"

Lagged effects of North Atlantic Oscillation on spittlebug Philaenus spumarius (Homoptera) abundance and survival by HALKKA, ANTTI, HALKKA, LIISA, HALKKA, OLLI, ROUKKA, KAISA, POKKI, JUSSI

“…The North Atlantic Oscillation (NAO) is a large-scale pattern of climate variability that has been shown to have important ecological effects on a wide…”
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The structure of bivalents in the Homoptera auchenorrhyncha by HALKKA, O

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Selection often overrides the effects of random processes in island populations of Philaenus spumarius (Homoptera) by HALKKA, OLLI, HALKKA, LIISA, ROUKKA, KAISA

“…The influence of various evolutionary factors on the populations of the colour polymorphic meadow spittlebug, Philaenus spumarius (Homoptera), was investigated…”
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RNA and Protein in Nucleolar Structures of Dragonfly Oocytes by Halkka, Liisa, Halkka, Olli

“…Dragonfly and damselfly oocytes regularly contain two nucleoluslike bodies of different sizes, a primary nucleolus and a secondary nucleolus. The primary…”
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Selection often overrides the effects of random processes in island populations of Philaenus spumarius (Homoptera) by HALKKA, OLLI, HALKKA, LIISA, ROUKKA, KAISA

“…The influence of various evolutionary factors on the populations of the colour polymorphic meadow spittlebug, Philaenus spumarius (Homoptera), was investigated…”
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Feasibility of Genetic Control of Small Mammals by Halkka, Olli

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Recombination in Six Homopterous Families by Halkka, Olli

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Recombination in Six Homopterous Families by Halkka, Olli

“…The chiasma frequencies and recombination indices of 60 species of the Homoptera Auchenorrhyncha are given in tabular form. This insect group is characterized…”
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Geographical variability of frontoclypeal colour polymorphism in Philaenus spumarius (L.) (Homoptera) by Svala, Eila, Halkka, Olli

“…Polymorphism in the pattern of pigmentation of the frontoclypeus was investigated in Finnish populations of the meadow spittlebug, Philaenus spumarius (L.)…”
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Polymorphic balance in small island populations of Lythrum salicaria by Halkka, Olli, Halkka, Liisa

“…Frequencies of the stylar length morphs long, mid and short were studied in 16 island populations of the purple loosestrife, Lythrum salicaria L., in the…”
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Equilibrium Populations of Philaenus spumarius L by HALKKA, OLLI

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Color Polymorphism in Some North American Philaenus spumarius (Homoptera: Aphrophoridae) Populations by Thompson, Vinton, Halkka, Olli

“…North American Philaenus spumarius populations exhibit a range of color forms comparable to those found in Europe and Asia. Typica and populi are the most…”
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Persistence of visual polymorphism, despite a low rate of predation, in Philaenus spumarius (L.) (Homoptera, Aphrophoridae) by Halkka, Olli, Kohila, Tarja, Komila, T.

“…In the Homopteran genus Philaenus the persistent maintenance of visual polymorphism is almost certainly due to persistent visual selection. The relevant…”
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Meiotische Mosaikzysten in der Zikadengattung Idiocerus by Halkka, Olli

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X-RAY-INDUCED CHANGES IN THE CHROMOSOMES OF LIMOTETTIX (HOMOPTERA) by HALKKA, O

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Colour polymorphism in northern peripheral populations of Cepaea hortensis by Valovirta, I, Halkka, O

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Enzyme gene heterozygosity in small island populations of Philaenus spumarius (L.) (Homoptera) by Saura, Anssi, Halkka, Olli, Lokki, Juhani

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The mode of meiosis in the Psyllina by Suomalainen, Esko, Halkka, Olli

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Chromosome breakage associated with infection. II. Stained sections by Halkka, O, Heinonen, L

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Characterization of clines and isolates in a case of balanced polymorphism by Halkka, O, Mikkola, E

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