| 41. |
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| 42. |
- Ericson, Per G P, 1956-, et al.
(författare)
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Subspecific identity of prehistoric Baltic cormorants Phalacrocorax carbo
- 1997
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Ingår i: Ardea. - 0373-2266 .- 2213-1175. ; 85:1, s. 1-7
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Tidskriftsartikel (refereegranskat)abstract
- Cormorants of the subspecies Phalacrocorax carbo sinensis breed in large numbers in the Baltic Sea. They migrate to the Mediterranean region to winter and are then replaced in the Baltic by wintering individuals of the Norwegian population of the nominate subspecies carbo. Cormorants bred in the Baltic during prehistoric times too, but as evident from a comparison of skeletal measurements in present-day and prehistoric Cormorants, these individuals belonged to the nominate subspecies carbo. The Swedish subfossil record of the Cormorants available for study, does not include any remains small enough to suggest the presence of sinensis. Precisely when the subspecies sinensis immigrated into the Baltic is unknown, but it must have occurred sometime between 1500 and 1800 AD.
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| 43. |
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| 44. |
- Ericson, Per G P, 1956-, et al.
(författare)
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Systematic affinities of the lyrebirds (Passeriformes : Menura), with a novel classification of the major groups of passerine birds.
- 2002
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Ingår i: Molecular Phylogenetics and Evolution. - 1055-7903 .- 1095-9513. ; 25:1, s. 53-62
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Tidskriftsartikel (refereegranskat)abstract
- Phylogenetic relationships of the lyrebirds are investigated using DNA sequence data. The aligned data matrix consists of 4027 bp obtained from three nuclear genes (c-myc, RAG-1 and myoglobin intron II) and two mitochondrial genes (cytochrome b and ND2). Both maximum-likelihood and parsimony analyses show that the lyrebirds unambiguously belong to the oscine radiation, and that they are the sister taxon to all other oscines. The results do not support the suggestion based on DNA-DNA hybridization data (Sibley and Ahlquist, 1990) that the treecreepers and bowerbirds are part of the lyrebird clade. Nevertheless, treecreepers and bowerbirds are sister taxa to all other oscines (except the lyrebirds) and may constitute a monophyletic group, although bootstrap support values for this clade are low. A major disagreement between the present analysis and that based on DNA-DNA hybridization data is that the Corvida (sensu Sibley and Ahlquist, 1990) and Passerida are not reciprocally monophyletic, as we find the latter group be nested within the Corvida. Also, the superfamilies Meliphagoidea and Corvoidea sensu, are not recovered as monophyletic in the present study. Within the oscine radiation, all taxa belonging to the earliest splits are confined to the Australo-Papuan region. This suggests strongly that the origins and early radiation of the oscines occurred in the southern supercontinent Gondwana. A new classification of the major groups of passerines is presented following from the results presented in the present study, as well as those published recently on analyses of sequence data from the nuclear c-myc and RAG-1 genes (Ericson et al., 2002; Irestedt et al., 2001).
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| 45. |
- Ericson, Per G P, 1956-
(författare)
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Systematic relationships of the palaeogene family Presbyornithidae (Aves : Anseriformes)
- 1997
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Ingår i: Zoological Journal of the Linnean Society. - 0024-4082 .- 1096-3642. ; 121:4, s. 429-483
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Tidskriftsartikel (refereegranskat)abstract
- The early Tertiary (Paleocene and Eocene) family Presbyornithidae is one of the most completely known group of fossil birds. Essentially all parts of the skeleton are represented in the fossil record, allowing a thorough analysis of the phylogenetic position of the family. Forty-two families of nonpasserine birds representing the orders Ciconiiformes, Anseriformes, Galliformes, Gruiformes and Charadriiformes, were included in a cladistic analysis of 71 skeletal characters. The previously suggested anseriform affinity of the Presbyornithidae was confirmed. Furthermore, the family proved to be closer to the Anatidae than to the Anhimidae or Anseranatidae. The many postcranial similarities with certain charadriiform birds as the Burhinidae, obviously are plesiomorphies. By this observation, a better undestanding of character evolution in nonpasserine skeletal morphology is gained. The often suggested close relationship of anseriform and galliform birds is not confirmed by osteology. Instead, the Anseriformes and the Phoenicopteridae form a monophyletic clade that is the sister to the remaining ciconiiform birds. This result renders the Ciconiiformes sensu Wetmore (1960) polyphyletic. (C) 1997 The Linnean Society of London.
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| 46. |
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| 47. |
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| 48. |
- Ericson, Per G P, 1956-, et al.
(författare)
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The earliest record of house sparrows (Passer domesticus) in northern Europe
- 1997
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Ingår i: Journal of Archaeological Science. - : Elsevier BV. - 0305-4403 .- 1095-9238. ; 24:2, s. 183-190
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Tidskriftsartikel (refereegranskat)abstract
- Remains of the house sparrow (Passer domesticus) recovered from a late Bronze Age (1200-800 sc) settlement in central Sweden are described. The house sparrow is conspicuously rare in prehistoric Europe, and this record constitutes the earliest from the northern part. The find predates the introduction of domestic fowl (Gallus gallus) to Sweden, a species with which the house sparrow has been assumed to be spread simultaneously. Instead, it is here suggested that house sparrows most likely spread over Europe along with the horse Equus caballus. (C) 1997 Academic Press Limited
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| 49. |
- Ericson, Per G P, 1956-, et al.
(författare)
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The origin
- 2020
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Ingår i: <em>The Largest Avian Radiation</em>. - Barcelona : Lynx Edicions. - 9788416728336 ; , s. 19-26
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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| 50. |
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