Articles

Title:	The distribution and local dispersal of Ponto- Caspian peracarida in Lithuanian fresh waters with notes on Pontogammarus robustoides population establishment, abundance and impact
Authors:	Arbaciauskas Kęstutis
Abstract:	Recently, the introduced Ponto-Caspian mysids and amphipods live in three water reservoirs (WR) and fifteen lakes of Lithuania. Hemimysis anomala inhabits only Kaunas WR, whereas other mysids, Paramysis lacustris and Limnomysis benedeni, occur in three and two WRs, and in eleven and two lakes, respectively. The alien amphipods Pontogammarus robustoides, Chaetogammarus warpachowskyi, and Obesogammarus crassus inhabit three, two, and two WRs, and nine, seven, and three lakes, correspondingly. The ability of the mysid P. lacustris to disperse upstream is higher than that of the introduced amphipods. Of the introduced peracaridan species, the mysid P. lacustris and the amphipod P. robustoides are best adapted to stagnant water environments. They can only establish viable populations in large, open lakes, or in lakes with high water turnover. The probability of P. robustoides establishing a sustainable population is higher in mesotrophic lakes than it is in eutrophic lakes. In lakes that provide sufficient oxygen conditions for P. robustoides, the process of the development of populations might be mediated by water ion content. The abundance of the amphipod in stagnant water bodies is positively correlated with their area. In habitats that are favorable for P. robustoides, this alien amphipod species out-competes the native amphipod species Gammarus lacustrishas a negative impact on the native isopod Asellus aquaticus.
DOI:
Type of paper:	Original research paper
Pages:	93 to 111
Cytation:	Arbaciauskas K, 2005, The distribution and local dispersal of Ponto- Caspian peracarida in Lithuanian fresh waters with notes on Pontogammarus robustoides population establishment, abundance and impact, Ocean. Hydrob. Studies, 34(Supl. 1):93-111
Keywords:	amphipod, mysid, Ponto- Caspian, native, inland waters
Year:	2005
Category:
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