搜索结果: 1-15 共查到“海洋科学 selection”相关记录15条 . 查询时间(0.183 秒)
Positive Selection and Sequence Rearrangements Generate Extensive Polymorphism in the Gamete Recognition Protein Bindin
Positive Selection Sequence Rearrangements
2015/12/17
Bindin is a gamete recognition protein of sea urchins that mediates species-specific attachment of sperm to an eggsurface receptor during fertilization. Sequences of bindin from closely related urchin...
Whole-Genome Positive Selection and Habitat-Driven Evolution in a Shallow and a Deep-Sea Urchin
positive selection dN/dS
2015/12/11
Comparisons of genomic sequence between divergent species can provide insight into the action of natural
selection across many distinct classes of proteins. Here, we examine the extent of positive se...
Environmental selection and resource allocation determine spatial patterns in picophytoplankton cell size
Environmental selection picophytoplankton cell
2014/4/2
Here we describe a new trait-based model for cellular resource allocation that we use to investigate the relative
importance of different drivers for small cell size in phytoplankton. Using the model...
Microevolution in time and space: SNP analysis of historical DNA reveals dynamic signatures of selection in Atlantic cod
fi sheries-induced evolution Gadus morhua genome scan
2015/12/11
Little is known about how quickly natural populations adapt to changes in their environment and how temporal and spatial variation in selection pressures interact to shape
patterns of genetic diversi...
Evidence of selection for resistance to paralytic shellfish toxins during the early life history of soft-shell clam (Mya arenaria) populations
selection paralytic shellfish toxins
2014/4/17
This study identifies early, postmetamorphic soft-shell clams, Mya arenaria, as the life-history stage most
susceptible to effects of blooms of paralytic shellfish poisoning (PSP) toxin–producing Ale...
Two-step dialogue between the cladoceranBosminaand invertebrate predators: Induction and natural selection
Two-step dialogue cladocera Bosmina invertebrate predators: Induction natural selection
2014/4/16
Aquatic prey species respond to predators with fast (developmental) and slow (selective) feedbacks. Natural selection is assumed to fashion details of induction and to modify baseline morphology, but ...
An Objective Analysis of the POLYMODE Local Dynamics Experiment. Part I：General Formalism and Statistical Model Selection
Local Dynamics Experiment Statistical Model Selection General Formalism
2009/1/10
A formalism is presented for making estimates of a variety of mesoscale quantities—streamfunction, potential vorticity, and both linear and nonlinear terms in the dynamical balance equations for heat ...
Intraspecific divergence in sperm morphology of the green sea urchin, Strongylocentrotus droebachiensis: implications for selection in broadcast spawners
sperm morpholog sea urchin,
2015/12/11
Sperm morphology can be highly variable among species, but less is known about
patterns of population differentiation within species. Most studies of sperm morphometric
variation are done in species...
Effects of Stratification and Bottom Topography on the Kuroshio Path Variation South of Japan. Part I: Dependence of the Path Selection on Velocity
Stratification Bottom Topography Kuroshio Path Variation
2008/7/22
Numerical experiments are executed using a two-layer inflow–outflow ocean model with simplified geometry to investigate the effects of stratification and bottom topography on the path variation of the...
Selection by a deposit-feeding polychaete,Polygordius jouinae, for sands with relatively high organic content
deposit-feeding polychaete Polygordius jouinae sands relatively high organic content
2014/4/18
Field observations and flume experiments investigated whether subsurface migration and selection by adult Polygordius jouinae for sediment enriched with organic flocs could help explain small-scale pa...
Strong purifying selection in the silicon transporters of marine and freshwater diatoms
Strong purifying silicon transporters of marine freshwater diatoms
2014/4/22
Marine and freshwater diatoms show several important differences in silicon physiology. In addition to containing an order of magnitude more silica in their cell walls, freshwater diatoms also appear ...
Change in filter-screen morphology and depth selection: Uncoupled responses of Daphnia to the presence of filamentous cyanobacteria
filter-screen morphology depth selection: Uncoupled responses filamentous cyanobacteria
2014/4/21
In many eutrophic lakes, ability to cope with filamentous cyanobacteria is crucial to Daphnia fitness, as the filaments can reduce food intake by interference with food-particle retention. Two basic m...
Habitat selection during settlement of three Caribbean coral reef fishes: Indications for directed settlement to seagrass beds and mangroves
Habitat selection during settlement of three Caribbean coral reef fishes: Indications for directed settlement to seagrass beds and mangroves
2014/4/23
We studied the settlement patterns of three Caribbean coral reef fishes in three different habitat types: mangroves, seagrass beds, and coral reefs. The settlement patterns of the three species were n...
Life history strategy and depth selection behavior as alternative anitipredator defenses among natural Daphnia hyalina populations
Life history strategy depth selection behavior alternative anitipredator defenses natural Daphnia hyalina populations
2014/5/9
We analyzed distribution patterns and life history traits in 14 natural Daphnia hyalina populations. The populations at shallower depths during the day began reproduction at a smaller size and showed ...
Evidence for constant and highly specific active food selection by benthic ciliates in mixed diatoms assemblages
Evidence benthic ciliates
2014/5/14
Observational and experimental studies have shown that phagotrophic ciliates are highly selective predators.
However, little is as yet known about the actual mechanisms involved in prey selection. We...