Worldwide large-scale fluctuations of sardine and anchovy populations
نویسندگان
چکیده
منابع مشابه
Climate, fishing, and fluctuations of sardine and anchovy in the California Current.
Since the days of Elton, population cycles have challenged ecologists and resource managers. Although the underlying mechanisms remain debated, theory holds that both density-dependent and density-independent processes shape the dynamics. One striking example is the large-scale fluctuations of sardine and anchovy observed across the major upwelling areas of the world. Despite a long history of ...
متن کاملModeling sardine and anchovy low-frequency variability.
The group of small pelagics (sardines, anchovies, herrings, etc.) is the largest source of wild marine protein worldwide, providing annually between 21% and 43% of the total marine capture production during at least the last 60 y (1). Even when large-scale fisheries have been operating for decades to centuries, their assessment and management remains difficult and highly uncertain (2). Such cha...
متن کاملProteolysis of Sardine (Sardina pilchardus) and Anchovy (Stolephorus commersonii) by Commercial Enzymes in Saline Solutions.
Fish sauce production is a very long process and there is a great interest in shortening it. Among the different strategies to speed up this process, the addition of external proteases could be a solution. This study focuses on the effect of two commercial enzymes (Protamex and Protex 51FP) on the proteolysis of two fish species traditionally converted into fish sauce: sardine and anchovy, by c...
متن کاملDiel behavior of sardine and anchovy schools in the California Current System
Fish schools containing Pacific sardine Sardinops sagax and northern anchovy Engraulis mordax were observed in 2 regions within the California Current System in 2 years using a combination of moored and shipboard acoustics and net sampling. Schools of sardines and anchovies off the Oregon coast followed typical diel patterns consistent with antipredator behavior, dispersing at nighttime, rapidl...
متن کاملSpatial dynamics of anchovy, sardine, and hake pre-recruit stages in the California Current
Three genera, Engraulis, Sardinops, and Merlucciu have coincident spawning and juvenile brood areas in most eastern and western boundary currents throughout the world. The CalCOFI survey program has amassed a 50-year data series on location and timing of spawning and the resultant recruitment of anchovy, sardine, and hake in the California Current region. Use of existing Lefkovitch matrix popul...
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ژورنال
عنوان ژورنال: South African Journal of Marine Science
سال: 1999
ISSN: 0257-7615
DOI: 10.2989/025776199784125962