搜索结果: 46-60 共查到“知识库 海洋科学”相关记录8818条 . 查询时间(0.351 秒)
All males are not created equal: Fertility differences depend on gamete recognition polymorphisms in sea urchins
created equal gamete recognition polymorphisms
2015/12/17
Behaviors, morphologies, and genetic loci directly involved in
reproduction have been increasingly shown to be polymorphic
within populations. Explaining how such variants are maintained
by selecti...
The prodigal fish
prodigal fish whaling fleets
2015/12/17
When Captain Ahab left harbour to
hunt the white whale, he did not
know exactly where to start. Cruising
the hard sea of the nineteenth-century whaling fleets, he hunted and waited, primed for
the...
Rapid Rate of Control-Region Evolution in Pacific Butterflyfishes (Chaetodontidae)
Pacific Butterflyfishes Control-Region Evolution
2015/12/17
Sequence differences in the tRNA-proline
(tRNApro) end of the mitochondrial control-region of
three species of Pacific butterflyfishes accumulated 33–
43 times more rapidly than did changes within ...
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...
Contrasting Population Structure from Nuclear Intron Sequences and mtDNA of Humpback Whales
Nuclear Intron Sequences mtDNA
2015/12/17
Powerful analyses of population structure require information from multiple genetic loci. To help develop a
molecular toolbox for obtaining this information, we have designed universal oligonucleoti...
Ecological subsidies alter the structure of marine communities
subsidies alter marine communities
2015/12/16
Subsidies are usually the subject of
purely economic debates. They
represent flow of resources from
one economic sector to another
and can be fundamental to competitive
ability of industries in d...
纳米银由于其独特的抗菌特性广泛应用于工商业领域.通过研究3种不同粒径和包裹物的纳米银对典型海洋微藻中肋骨条藻(Skeletonema costatum)的毒性效应,进一步丰富纳米银对藻类毒性效应及其作用机制的认识.结果表明3种纳米银对硅藻细胞生长都有不同程度的生长抑制效应,其毒性大小依次为10 nm-OA>10 nm-PVP>20 nm-PVP.在细胞毒性方面,相同粒径的聚乙烯吡咯烷酮(PVP)包...
The tip of the tail: molecular identification of seahorses for sale in apothecary shops and curio stores in California
Molecular forensics
2015/12/11
Millions of seahorses a year are traded internationally, with many eventually sold at retail shops as
curios, as aquarium pets, and especially for use in traditional medicine. The entire genus is now...
Extensive sympatry, cryptic diversity and introgression throughout the geographic distribution of two coral species complexes
Acropora, ryptic species hybridization
2015/12/11
The identification of species is one of the most basic, and yet critically important, issues
in biology with far-reaching potential implications for fields such as biodiversity
conservation, populat...
Populations of Symbiodinium muscatinei Show Strong Biogeographic Structuring in the Intertidal Anemone Anthopleura elegantissima
Symbiodinium muscatinei Anthopleura elegantissima
2015/12/11
Among temperate cnidarian symbioses, the
partnership between the intertidal anemone Anthopleura
elegantissima and its dinoflagellate and chlorophyte symbionts is one of the most well character...
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...
Designing marine reserve networks for both conservation and fisheries management
fi shery profi t ocean policy sustainability
2015/12/11
Marine protected areas (MPAs) that excludefishing have been shown repeatedly to enhance the abundance, size, and diversity of species.
These benefits, however, mean little to most marine ...
USING ISOLATION BY DISTANCE AND EFFECTIVE DENSITY TO ESTIMATE DISPERSAL SCALES IN ANEMONEFISH
Amphiprion clarkii continuous population
2015/12/11
Robust estimates of dispersal are critical for understanding population dynamics and local adaptation, as well as for successful
spatial management. Genetic isolation by distance patterns hold clues ...
Are Antarctic minke whales unusually abundant because of 20th century whaling?
Antarctic marine ecosystem Antarctic minke whale
2015/12/11
Severe declines in megafauna worldwide illuminate the role of top predators in
ecosystem structure. In the Antarctic, the Krill Surplus Hypothesis posits that the killing
of more than 2 million larg...
Marine reserves help preserve genetic diversity after impacts derived from climate variability: Lessons from the pink abalone in Baja California
Marine reserve Overfishing
2015/12/11
Genetic diversity is crucial for the adaptation of exploited species like the pink abalone
(Haliotis corrugata), faced with threats from climate change, overfishing and impacts
associated with aquac...