منابع مشابه
Recovery of marine animal populations and ecosystems.
Many marine populations and ecosystems have experienced strong historical depletions, yet reports of recoveries are increasing. Here, we review the growing research on marine recoveries to reveal how common recovery is, its magnitude, timescale and major drivers. Overall, 10-50% of depleted populations and ecosystems show some recovery, but rarely to former levels of abundance. In addition, rec...
متن کاملNetworked GPS Approach to Tracking Marine Animal Schools
There has been a great need to track marine animal schools in order to study their seasonal and regional behaviors, to study species diversity and gene flow, to protect endangered species, and to study pelagic environments and global climate change. However, existing means, such as GPS tags, do not suffice because of their low accuracy, low availability, and low integrity. This paper presents a...
متن کاملPlate tectonic regulation of global marine animal diversity.
Valentine and Moores [Valentine JW, Moores EM (1970) Nature 228:657-659] hypothesized that plate tectonics regulates global biodiversity by changing the geographic arrangement of continental crust, but the data required to fully test the hypothesis were not available. Here, we use a global database of marine animal fossil occurrences and a paleogeographic reconstruction model to test the hypoth...
متن کاملKilling begets killing: evidence from a bug-killing paradigm that initial killing fuels subsequent killing.
Killing appears to perpetuate itself even in the absence of retaliation. This phenomenon may occur in part as a means to justify prior killing and so ease the threat of prior killing. In addition, this effect should arise particularly when a killer perceives similarity to the victims because similarity should exacerbate threat from killing. To examine these ideas, the authors developed a bug-ki...
متن کاملImpact of Marine Drugs on Animal Reproductive Processes
The discovery and description of bioactive substances from natural sources has been a research topic for the last 50 years. In this respect, marine animals have been used to extract many new compounds exerting different actions. Reproduction is a complex process whose main steps are the production and maturation of gametes, their activation, the fertilisation and the beginning of development. I...
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ژورنال
عنوان ژورنال: Nature
سال: 1983
ISSN: 0028-0836,1476-4687
DOI: 10.1038/304110a0