Capelin larvae (Mallotus villosus) and community structure of zooplankton off the coast of northern Norway |
| |
Authors: | Fossheim Maria; Tande Kurt S; Semenova Tatjana; Timonin Alexander |
| |
Institution: | 1 Norwegian College of Fishery Science, University of Tromsø, 9037 Tromsø, Norway, 2 P.P. Shirshov Institute of Oceanology, Russian Academy of Sciences, Nakhimovsky PR.36, Moscow 117218, Russia |
| |
Abstract: | Capelin larvae (Mallotus villosus) and mesozooplankton werecollected in May 2001 in the southern part of the Barents Sea.During the period of hatching and first feeding, capelin larvaeexperience high mortality rates. In order to understand theunderlying mechanisms influencing larval survival, we monitoreda selected site for 10 days using a variety of different samplingapproaches. Hydrological parameters conductivitytemperaturedepthfluorescence(CTDF) were recorded and zooplankton samples obtained simultaneouslyusing MOCNESS at three time periods. The mesozooplankton consistedessentially of copepods (85), dominated by Calanus finmarchicus.The zooplankton community consisted of different assemblagesderived from different areas (i.e. different water masses; Atlanticand coastal). Capelin larvae were found in surficial coastalwaters. Copepod nauplii and C. finmarchicus were less abundantin coastal waters where small copepodites (such as Acartia spp.and Temora longicornis) were found together with early stagesof coastal invertebrates that are possible prey for capelinlarvae. We suggest that capelin larvae base their foraging onsmall prey organisms frequently found among the coastal zooplanktonand that these larvae are less dependent on the propagationof the recruiting generation of C. finmarchicus present fromApril to June. |
| |
Keywords: | |
本文献已被 Oxford 等数据库收录! |
|