Affiliation:
1. Université de Franche-Comté – Laboratoire Chrono-Environnement, UMR CNRS/UFC6249, F-25211 Montbéliard cedex, France
2. Muséum de Besançon, 99 rue des fusillés, La Citadelle, 25000 Besançon, France
Abstract
Abstract
The invasive freshwater hydromedusa Craspedacusta sowerbii Lankester, 1880 (phylum Cnidaria, class Hydrozoa, family Olindiidae) is native from East Asia but for more than 20 years, reports of this species have been increasing in Europe, North America, and Australia. Due to the sporadic presence of the medusa stage and difficulties in the sample polyp stage, there is a lack of data on the physiological parameters of C. sowerbii and its potential impact. We present data on growth and ingestion rates of the medusa stage measured at 29°C, temperature at which polyps are maintained in the Cinéaqua Aquarium (Paris). Medusa growth increased from 0.60 ± 0.08 to 9.0 ± 2.1 mm (mean: 0.28 ± 0.26 mm d−1), and gonads appeared after 11.5 ± 3.0 days. Ingestion rates increased significantly from 28 ± 16 prey ind−1 d−1 (<1 mm) to 442 ± 170 prey ind−1 d−1 (>7 mm).
Publisher
Oxford University Press (OUP)
Subject
Ecology,Aquatic Science,Ecology, Evolution, Behavior and Systematics
Cited by
3 articles.
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