نتایج جستجو برای: cyclopoid copepod
تعداد نتایج: 2639 فیلتر نتایج به سال:
High resolution vertical distributions of chlorophyll and zooplankton were collected with an instrumented Batfish vehicle in northeastern Baffin Bay. The dominant copepod species wc1.e Calanusfinmllrchicus, Calanus glncinlis, and Calanus hyperlporeus V and VI. Copepod layers consisting of C. jkmclr-chicus and C. glncialis were commonly situated ~3-4 m above the chlorophyll maximum in a depth re...
Phylogenetic relationships within the copepod family Euchaetidae and between representatives of three copepod orders (Calanoida, Harpacticoida, and Poecilostomatoida) were investigated using partial nucleotide sequences of the mitochondrial 16S rRNA and the nuclear 28S rRNA genes. DNA isolation, polymerase chain reaction, cloning, and DNA sequencing techniques were customized for these crustace...
Two copepod groups Acartia bifilosa adults and nauplii were examined for the effect of preservation with 4% formalin solution on their total body length. The length of the same individual was measured before, immediately, one week, and two months after formalin fixation. There was no statistically significant difference in live and preserved copepod body length at any time of measurement ei...
Citation: Christou ED, Zervoudaki S, Fernandez De Puelles ML, Protopapa M, Varkitzi I, Pitta P, Tsagaraki TM and Herut B (2017) Response of the Calanoid Copepod Clausocalanus furcatus, to Atmospheric Deposition Events: Outcomes from a Mesocosm Study. Front. Mar. Sci. 4:35. doi: 10.3389/fmars.2017.00035 Response of the Calanoid Copepod Clausocalanus furcatus, to Atmospheric Deposition Events: Ou...
Dense localized blooms of the toxic dinoflagellate Alexandrium ostenfeldii are a recent phenomenon in the low salinity waters of the Baltic Sea. This study reports results from laboratory experiments investigating the interaction between PSP toxin producing strains of A. ostenfeldii and two copepod species, Eurytemora affinis and Acartia bifilosa, from the northern Baltic Sea. Copepod grazing r...
Members of subclass Copepoda are abundant, diverse, and-as a result of their variety of ecological roles in marine and freshwater environments-important, but their phylogenetic interrelationships are unclear. Recent studies of arthropods have used gene arrangements in the mitochondrial (mt) genome to infer phylogenies, but for copepods, only seven complete mt genomes have been published. These ...
Giant liposomes are proposed as a potential delivery system in marine copepods, the dominant constituent of the zooplankton. Liposomes were prepared in the same size range as the food ingested by copepods (mean diameter of about 7 microm). The encapsulation of a hydrophilic and high molecular mass fluorescent compound, fluorescein isothiocyanate-dextran (FitcDx), within the liposomes provided a...
We compare the nature of copepod outfluxes of nonliving matter, the factors controlling their rate and their fate, and finally their role, particularly their relative importance in the carbon and nitrogen cycle. Copepods release dissolved matter through excretion and respiration and particulate matter through production of faecal pellets, carcasses, moults, and dead eggs. Excretion liberates se...
The unsaturated karst represents a transitional zone connecting the land surface to water table of underlying saturated through percolating and small perched aquifers. It constitutes significant groundwater reservoir hosts high biodiversity specialized endemic species. Whereas investigating this ecotone can shed light on invertebrate diversity whole system, ecological studies in have been hampe...
We describe application of a new apparatus that permits simultaneous detailed observations of plankton behavior and turbulent velocities. We are able to acquire 3D trajectories amenable to statistical analyses for comparisons of copepod responses to wellquantified turbulence intensities that match those found in the coastal ocean environment. The turbulence characteristics consist of nearly iso...
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