Naslov
A new species of freshwater goby of the genus Knipowitschia (Teleostei: Gobiidae) from Hutovo Blato wetland (Neretva River basin), Bosnia and Herzegovina

Autori
Ahnelt, Harald ; Tutman, Pero ; Dulčić, Jakov ; Glamuzina, Branko

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

Izvornik
13th European congress of ichthyology, Abstract book / Kontautas, Antanas - Klaipeda : Klaipedos Universitetas, 2009, 73-74

ISBN
978-9955-18-452-2

Skup
13th European congress of ichthyology

Mjesto i datum
Klaipėda, Litva, 06.09.2009. - 12.09.2009

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
new species; Knipowitschia un. sp. nova

Sažetak
The Dalmatia division of the Euro-Mediterranean ichthyological subregion, is characterized by a high number of endemic freshwater fishes. This also includs a stock of gobiid fishes of the Ponto-Caspian genus Knipowitschia. Subsequent vicariant events (the Messinian salinity crisis of the Mediterranean during the Miocene, Holocene eustatic sea level fluctuations) probably led to diversification of an ancestral stock of euryhalin Knipowitschia and to adaptation to habitats characterized by different salinity levels (from brackish to fresh waters). Adriatic Knipowitschia have undergone isolation and seemingly as a response to a wide spectrum of habitats populations show morphological differences. A key feature is obviously reduction in size and subsequently reduction of morphological characters e.g. in squamtion and of the lateral-line system. Several east Adriatic drainage systems inhabit morphological distinct and biologically isolated Knipowitschia-forms. This holds also true fort the Neretva drainage system which is characterized by geographic isolation from other catchments, complicated geological history and characteristic climate conditions. In the catchment of the lower Neretva a few small shallow karstic lakes of the Nature park Hutovo Blato are inhabited by an undescribed species of Knipowitschia. The collected specimens represents a new species, Knipowitschia hutovae sp. nov. which formal description is given. This new species is characterized by a high variability in morphological characters. A combination of varying reductions of the head lateral-line canals up to the complete loss of these canals and subsequently their replacement by free neuromasts is observed. Accompanied are these reductions by a reduction in squamation. Adaptation to distinct environmental conditions in these small shallow lakes with silty bottom and characteristic vegetation on their banks seemingly also led to an unusual spawning behaviour and to a characteristic nuptial colouration.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

POVEZANOST RADA