Mortality of post-settlement clams Rangia cuneata (Mactridae, Bivalvia) at an early stage of invasion in the Vistula Lagoon (South Baltic) due to biotic and abiotic factors

Ryszard Kornijów , Krzysztof Pawlikowski , Aleksander Drgas , Leszek Rolbiecki , Agata Rychter


The clam Rangia cuneata , originating from the Gulf of Mexico, was recorded in the Vistula Lagoon for the first time in the early 2010s, and quickly became the dominant component of the zoobenthic biomass. To assess mortality as a factor potentially controlling the growth of Rangia popula- tion, a year-long field experiment involving marked bivalves placed in sediment-filled trays deployed on the bottom was conducted in 2014 and 2015. Predator- induced mortality of the clams was low in summer, and very high in the winter–spring period. It was inversely proportional to the size of the clams. Such changes can be partially attributed to predation from at least five fish and three duck species, which contained clams in their digestive tracts. Non-predatory mortality particularly affected large individuals, and was highest in spring, several weeks after the end of winter. We hypothesize that it could be caused by persistent low temperatures over several winter months which led to considerable weakening of the condition of clams. A long winter could also reduce their resistance to environmental stress and potential effect of epibionts, as well as increase susceptibility to predation.
Author Ryszard Kornijów
Ryszard Kornijów,,
, Krzysztof Pawlikowski
Krzysztof Pawlikowski,,
, Aleksander Drgas
Aleksander Drgas,,
, Leszek Rolbiecki (FB / DIZP)
Leszek Rolbiecki,,
- Department of Invertebrate Zoology and Parasitology
, Agata Rychter
Agata Rychter,,
Journal seriesHydrobiologia, ISSN 0018-8158, (A 30 pkt)
Issue year2018
Publication size in sheets0.6
Keywords in Englishfish, waterfowl, predators, epibionts, parasites, food web, thermal conditions, survivorship
ASJC Classification1104 Aquatic Science
Languageen angielski
LicenseOther; published final; Uznanie Autorstwa (CC-BY); with publication
Score (nominal)30
ScoreMinisterial score = 30.0, 24-07-2019, ArticleFromJournal
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2017 = 1.078; WoS Impact Factor: 2017 = 2.165 (2) - 2017=2.444 (5)
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