Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: recent distribution

Sortuj według:

Ogranicz wyniki do:

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Recent distribution and stock assessment of the red alga Furcellaria lumbricalis on an exposed Baltic Sea coast: combined use of field survey and modelling methods

100%

Bucas M., Daunys D., Olenin S.

Oceanologia

2009

tom 51

nr 3

341-359

Recent results of field studies on the exposed coast of Lithuania were used to model the area occupied by the red alga Furcellaria lumbricalis using the Natural Neighbor interpolation technique, while linear regression was applied to estimate the species’ standing stock. The area covered by F. lumbricalis extended for 26 km along the coast between depths of 1 and 15 m. The maximum species cover in the study area ranged between 4 and 10 m depth, which is one of the widest in the Baltic Sea. The modelled area of F. lumbricalis covered 35 ± 11 km2 with a total biomass of 7554 ± 3813 t.

Alpine marmots in Austria. The present population structure as a result of the postglacial distribution history

84%

Preleuthner M., Pinsker W., Kruckenhauser L., Miller W. J., Prosl H.

Acta Theriologica. Supplement

1995

nr 03

The present distribution of the Alpine marmot Marmota m. marmota (Linnaeus, 1758) in Austria, the historical range during the Pleistocene, and recent efforts of re-introduction were documented. Autochthonous populations inhabit a continuous range extending over the western part of the Austrian Alps. Non-autochthonous populations occur in a more fragmented area of partly isolated massifs in the east. The non-autochthonous populations were generated by the release of only a few founder individuals (median = 5). The impact of founder effects and migration barriers on the structure of the disjunct non-autochthonous populations is confirmed by the genetic analysis of allozymes and VNTR-loci. Whereas autochthonous populations are characterized by high genetic similarity and common polymorphisms, the non-auto- chthonous populations exhibit a more patchy pattern of variation caused by founder effects and subsequent drift. From the relationships indicated by the VNTR-patterns it appears possible to infer the putative origin of the founder individuals. In previous allozyme studies the genetic variability was found to be reduced with the exception of two widespread polymorphisms at the loci Pep-1 and Sod-1. A parasitological survey shows that Pep-1 genotypes differ in their degree of infestation by endoparasites (Citellina alpina and Ctenotaenia marmotae) indicating that this polymorphism may be maintained by selective forces.

Ograniczanie wyników

1 Acta Theriologica. Supplement

1 Oceanologia

1 Bucas M.

1 Daunys D.

1 Kruckenhauser L.

1 Miller W. J.

1 Olenin S.

1 Pinsker W.

1 Preleuthner M.

1 Prosl H.

1 2009

1 1995

Wyniki wyszukiwania

Recent distribution and stock assessment of the red alga Furcellaria lumbricalis on an exposed Baltic Sea coast: combined use of field survey and modelling methods

Alpine marmots in Austria. The present population structure as a result of the postglacial distribution history