Naslov
Is it possible to detect narrow-clawed and noble crayfish probable hybrids using morphometric MDA?

Autori
Maguire, Ivana ; Špelić, Ivan ; Jelić, Mišel ; Štambuk, Anamaria ; Klobučar, Goran

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of Abstracts, IAA 19 Conference 2012 / Füreder, Leopold - Innsbruck : IAA, 2012, 83-83

Skup
IAA 19 Conference

Mjesto i datum
Innsbruck, Austrija, 26.08.2012. - 31.08.2012

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
Astacus astacus ; Astacus leptodactylus sp. complex ; discriminate analysis ; natural populations

Sažetak
Hybrids between Astacus leptodactylus and Astacus astacus have been obtained in laboratory conditions. Even though their occurrence within natural habitats has been sporadically mentioned, to our knowledge, no detailed study has been conducted so far to confi rm their existence. In Croatia both A. astacus and A. leptodactylus are native, with the latter expanding west- and southwards and slowly displacing A. astacus. During a distribution survey on the Mrežnica River (central Croatia) both species were recorded ; with A. astacus distributed upstream, A. leptodactylus downstream, and specimens of morphological appearance that are indecisive in term of species determination, in-between the two. Therefore the aim of this research was to measure 28 morphometrical characteristics from a large number of specimens caught from all three parts of the Mrežnica River and to analyse them using multivariate discriminant analysis (MDA). Additionally, extra A. astacus and A. leptodactylus specimens from populations whose determinations are undisputable, according to morphological characteristics, were also included into analyses. The results showed a clear separation between A. astacus and A. leptodactylus with a high percentage of correct classification. Specimens of peculiar morphological appearance were positioned in-between the two. The analyses showed that the carapace width had the highest discriminant value for both sexes, followed by carapace height and claw palm length (in males) or claw length (in females). Therefore, it is possible to detect separation between studied specimens using MDA, but for final decision on the possible hybrid existence in the natural habitat further molecular analyses should be applied.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

POVEZANOST RADA