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Thermal requirements for growth, survival and aerobic performance of weatherfish larvae Misgurnus fossilis
B. Schreiber, J. Monka, B. Drozd, M. Hundt, M. Weiss, T. Oswald, R. Gergs, R. Schulz,
Jazyk angličtina Země Anglie, Velká Británie
Typ dokumentu časopisecké články
PubMed
28097662
DOI
10.1111/jfb.13261
Knihovny.cz E-zdroje
- MeSH
- larva růst a vývoj MeSH
- máloostní růst a vývoj fyziologie MeSH
- spotřeba kyslíku * MeSH
- teplota * MeSH
- zvířata MeSH
- Check Tag
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
Thermal requirements of larval weatherfish Misgurnus fossilis were investigated in terms of growth, survival and aerobic performance. Growth and survival of M. fossilis larvae acclimated to five temperatures (11, 15, 19, 23 and 27° C) were measured over 25 days. In the upper temperature treatments (19, 23 and 27° C), survival of larvae was stable throughout the entire rearing period (>75%), whereas 11 and 15° C resulted in severe declines in survival (to <10%). Growth of larvae (expressed as dry mass and total length) was highest at 19 and 23° C, but significantly decreased at 27° C. Routine metabolic rate of 3 days post-hatch larvae was estimated as oxygen consumption rate (ṀO2 ) during acute exposure (30 min to 1 h) to seven temperatures (11, 15, 19, 23, 27, 31 and 35° C). Larval oxygen uptake increased with each consecutive temperature step from 11 to 27° C, until a plateau was reached at temperatures >27° C. All larvae of the 35° C regime, however, died within the ṀO2 measurement period. M. fossilis larvae show greater than expected tolerance of high temperatures. On the other hand, low temperatures that are within the range of likely habitat conditions are critical because they might lead to high mortality rates when larvae are exposed over periods >10 days. These findings help to improve rearing conditions and to identify suitable waters for stocking and thus support the management of re-introduction activities for endangered M. fossilis.
Alfred Wegener Institute for Polar and Marine Research Am Handelshafen 12 27570 Bremerhaven Germany
Institute for Environmental Sciences University of Koblenz Landau Fortstrasse 7 76829 Landau Germany
Struktur und Genehmigungsdirektion Süd Friedrich Ebert Str 14 67433 Neustadt Germany
Citace poskytuje Crossref.org
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