| 1. |
- Carlsson, J., et al.
(författare)
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Microsatellites reveal fine-scale genetic structure in stream-living brown trout
- 1999
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Ingår i: Journal of Fish Biology. - : John Wiley & Sons. - 0022-1112 .- 1095-8649. ; 55:6, s. 1290-1303
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Tidskriftsartikel (refereegranskat)abstract
- Multilocus F(ST) estimates revealed a pronounced genetic structure at six microsatellite loci in brown trout Salmo trutta in Nordre Finnvikelv, with at least three breeding units that remained stable over time. Significant differences in allele frequencies were found between five sections within a 3-km range, even when no physical barriers prevented fish from migrating between sections. It is argued that geological structures may rise to patterns resembling isolation by distance. Seemingly, the most important factor causing genetic differentiation in Nordre Finnvikelv is genetic drift in small populations that are geologically subdivided by a tributary and by impassable waterfalls. Some correlation between previous behavioural observations and genetic structures were found.
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| 2. |
- Dannewitz, J, et al.
(författare)
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Triploid progeny from a female Atlantic salmon x brown trout hybrid backcrossed to a male brown trout
- 1996
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Ingår i: JOURNAL OF FISH BIOLOGY. - : ACADEMIC PRESS LTD. - 0022-1112. ; 48:1, s. 144-146
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- A female Atlantic salmon x brown trout hybrid was backcrossed to a male brown trout. Electrophoretic analysis of diagnostic enzymes showed that the progeny were triploid. However, a few individuals were partially diploid. (C) 1996 The Fisheries Society of
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| 3. |
- Jansson, Håkan, et al.
(författare)
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Genetic relationships among species of hagfish revealed by protein electrophoresis
- 1995
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Ingår i: Journal of Fish Biology. - : Wiley. - 0022-1112 .- 1095-8649. ; 47:4, s. 599-608
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Tidskriftsartikel (refereegranskat)abstract
- Hagfish species of the genera Myxine, Eptatretus and Pnramyxine were analysed for genetic variation by allozyme electrophoresis and isoelectric focusing of general proteins. Large genetic differences were observed between samples of supposed conspecifics of Myxine circifrons from off the Californian coast, and also within one sample of Paramyxine sp. from Sagami Bay, Japan. The results are convincing evidence of the existence of additional sympatric species in these two areas. In general, the highest genetic identities were found between species within the subfamilies Myxininae and Eptatretinae. Within Eptatretinae, the Japanese species Eptatietus burgeri was genetically more similar to Japanese species of Paramyxine than to American species of Eptatretus. Thus, our data indicate that the generic status of Paramyxine should be reconsidered. (C) 1995 The Fisheries Society of the British Isles.
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| 4. |
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| 5. |
- Olsen, K Håkan, et al.
(författare)
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Effects of kinship on aggression and RNA content in juvenile Arctic charr
- 1997
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Ingår i: JOURNAL OF FISH BIOLOGY. - : ACADEMIC PRESS LTD. - 0022-1112. ; 51:2, s. 422-435
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Tidskriftsartikel (refereegranskat)abstract
- The behaviour of juvenile Arctic charr Salvelinus alpinus was studied in groups of four siblings composed of familiar and unfamiliar individuals or in mixed groups of four where both siblings and unrelated individuals were present. The frequency of aggres
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| 6. |
- Olsén, K. Håkan, 1952-, et al.
(författare)
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Effects of kinship on aggression and RNA content in juvenile Arctic charr
- 1997
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Ingår i: Journal of Fish Biology. - : ACADEMIC PRESS LTD. - 0022-1112 .- 1095-8649. ; 51:2, s. 422-435
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Tidskriftsartikel (refereegranskat)abstract
- The behaviour of juvenile Arctic charr Salvelinus alpinus was studied in groups of four siblings composed of familiar and unfamiliar individuals or in mixed groups of four where both siblings and unrelated individuals were present. The frequency of aggressive acts was significantly higher in the mixed groups compared to the pure sibling groups and the difference was present at all levels of the hierarchy rank order, based on a dominance index, except the lowest ranked individuals. The difference was significant after but not before feeding, implying that competition with non-kin for a food resource increased the aggression. No significant difference in weight gain was observed between sibling and mixed groups during the 6 days of the experiment, but the RNA contents of lateral musculature in dominant individuals from sibling groups were significantly higher than the corresponding fish in the mixed group, suggesting a difference in growth rate when the experiments ended. No significant difference in RNA content was observed between subordinate fish of the two treatments, i.e. siblings v. mixed.
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| 7. |
- Ostlund, S
(författare)
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Female 15-spined sticklebacks detect males with empty nests by non-visual cues
- 1995
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Ingår i: JOURNAL OF FISH BIOLOGY. - : ACADEMIC PRESS LTD. - 0022-1112. ; 47:6, s. 1106-1109
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Reproductive female 15-spined sticklebacks Spinachia spinachia chose water flowing from an unmated nesting male rather than water flowing from no male. Since the female could see neither the male nor his nest, this result suggests that she received non-vi
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| 8. |
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