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Interesujące opracowanie o Perissodus microlepis

Autor admin
Admin
#1 - Posted: 24 Kwi 2009 10:37 
Polecam:)

Phylogeographic structure and gene flow in the scale-eating cichlid Perissodus microlepis (Teleostei, Perciformes, Cichlidae) in southern Lake Tanganyika
Koblmuller S, Duftner N, Sefc KM, Aigner U, Rogetzer M, Sturmbauer C
ZOOLOGICA SCRIPTA
38 (3): 257-268 MAY 2009

Abstract:
One of the most fragmented habitats in freshwater lakes is the rocky littoral zone, where the already richly structured habitat is frequently interspersed with more pronounced barriers such as sandy bays, river estuaries and deep slopes. Although habitat fragmentation generally constrains the dispersal of specialized rock-dwelling species, patterns of population structure vary in sympatric taxa due to species-specific traits. In the present study, we examine the phylogeographic and population genetic structure of Perissodus microlepis, a presumptively highly mobile scale-eating cichlid fish endemic to Lake Tanganyika with a lake-wide distribution in the rocky littoral zone and no obvious geographical colour variation. Analysis of the mitochondrial DNA of six populations in the southern end of the lake suggests isolation by distance along rocky shoreline. Across a large muddy bay, a phylogeographic break indicates that environmental barriers restrict gene flow even in this highly mobile species. Restricted dispersal across the bay is not necessarily a consequence of an intrinsic propensity to avoid sand, but may be connected with the association between P. microlepis and other rock-dwelling fish, which the scale-eaters mimic and intermingle in order to be able to approach other fish to rip off scales from their bodies.

Marta

Autor sengir
Użytkownik
#2 - Posted: 1 Lip 2009 10:23 
Ja trafiłem na taki artykuł:

http://www.wdc-jp.biz/pdf_store/isj/publication/pd f/32/321/32108.pdf

Dość stare opracowanie, ale może kogoś zainteresuje.

Autor admin
Admin
#3 - Posted: 1 Lip 2009 10:45 
Bardzo ciekawa jest tabela 2 pokazująca, które gatunki ryb są najczęściej atakowane przez Perissodus microlepis.

Wychodzi na to, że roślinożercom najbardziej sie "dostaje".

Marta

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