Cladocerans of the Daphnia longispina complex are often the key components of pelagic food webs in northern temperate lakes and ponds. In the present study, we aimed to fill the gap in knowledge on the biogeography and diversity of this species complex, through analysis (by sequencing two mitochondrial genes) of the taxonomic structure of 18 lake populations across China, covering a large geogr…

PENGARUH KEPUASAN KERJA DAN KETERIKATAN KARYAWAN TERHADAP KEINGINAN KELUAR PADA PT ARTAJASA PERUSAHAAN LAYANAN JASA ELEKTRONIS Skripsi Program Strata Satu Jurusan Manajemen. Fakultas Ekonomi dan Bisnis Universitas Muhammadiyah Prof. DR. HAMKA. 2016. Jakarta. Kata Kunci: Kepuasan Kerja, Keterikatan Karyawan, Keinginan Keluar. Penelitian ini bertujuan untuk mengetahui kepuasan kerja dan keteri…

The origin of shear wave splitting (SWS) in the mantle beneath Iceland is examined using numerical models that simulate 3-D mantle flowand the development of seismic anisotropy due to lattice-preferred orientation (LPO). Using the simulated anisotropy structure, we compute synthetic SKS waveforms, invert them for fast polarization directions and split times, and then compare the predictions wit…

The static and transient deformations produced by earthquakes cause density perturbations which, in turn, generate immediate, long-range perturbations of the Earth’s gravity field. Here, an analytical solution is derived for gravity perturbations produced by a point double-couple source in homogeneous, infinite, non-self-gravitating elastic media. The solution features transient gravity pert…

Collection of zooplankton is done using a wide array of instrumentation. To ensure the long-term value of zooplankton data, metadata about what the data are and when, where, and how the data were collected, plus the use of a domainspecific, controlled vocabulary is essential. It is especially important to use a controlled “deployment” vocabulary when plankton nets are used to collect data, …

The effect of P-limitation and viral infection on prokaryotic production (PP) and respiration was determined during the early winter in the Northwestern Mediterranean Sea. Addition of P enhanced prokaryotic growth and viral production. The concentrations of total dissolved nitrogen increased linearly with decreasing viral abundance, PP and growth efficiency across treatments. Our data suggest …

Tahun Terbit

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Molecular analyses of small-sized copepods (<=1 mm) generally involve the complete destruction of the specimens. Consequently, incongruences between the molecular and morphological results cannot be investigated since no specimen vouchers remain. The present study provides a modified column-based DNA extraction method to retain the exoskeleton of the specimen and thus, to enable molecular and …

Prey size selectivity in piscivorous fish larvae is important to both aquaculture and fisheries science, but laboratory experiments are few. We analyzed selective foraging in Atlantic bluefin tuna larvae (Thunnus thynnus) using two larval fish prey species. The experiments revealed that selective foraging of prey sizes differed among bluefin tuna predator sizes (15–25 mm SL) and prey species,…

For freshwater prey like Daphnia and larvae of Chaoborus, it is well documented that they adjust their residence depth in the water column in response to predator kairomones in order to decrease encounter probability with the respective predator. Despite the importance of infochemicals in predator–prey interactions, it has not been tested if predators adjust their residence depth in response …