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Cloudy with a chance of sardines: forecasting sardine distributions using regional climate models
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Isaac C. Kaplan Gregory D. Williams Nicholas A. Bond Albert J. Hermann Samantha A. Siedlecki 《Fisheries Oceanography》2016,25(1):15-27
Despite the significant advances in making monthly or seasonal forecasts of weather, ocean hypoxia, harmful algal blooms and marine pathogens, few such forecasting efforts have extended to the ecology of upper trophic level marine species. Here, we test our ability to use short‐term (up to 9 months) predictions of ocean conditions to create a novel forecast of the spatial distribution of Pacific sardine, Sardinops sagax. Predictions of ocean conditions are derived using the output from the Climate Forecast System (CFS) model downscaled through the Regional Ocean Modeling System (ROMS). Using generalized additive models (GAMs), we estimated significant relationships between sardine presence in a test year (2009) and salinity and temperature. The model, fitted to 2009 data, had a moderate skill [area under the curve (AUC) = 0.67] in predicting 2009 sardine distributions, 5–8 months in advance. Preliminary tests indicate that the model also had the skill to predict sardine presence in August 2013 (AUC = 0.85) and August 2014 (AUC = 0.96), 4–5 months in advance. The approach could be used to provide fishery managers with an early warning of distributional shifts of this species, which migrates from the U.S.–Mexico border to as far north as British Columbia, Canada, in summers with warm water and other favorable ocean conditions. We expect seasonal and monthly forecasts of ocean conditions to be broadly useful for predicting spatial distributions of other pelagic and midwater species. 相似文献
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Interdecadal variations in Japanese sardine and ocean/climate 总被引:3,自引:1,他引:2
ICHIRO YASUDA HIROYA SUGISAKI YOSHIRO WATANABE SHO-SHIRO MINOBE & YOSHIOKI OOZEKI 《Fisheries Oceanography》1999,8(1):18-24
Relations between the long-term variations in numbers of Japanese sardine and in ocean/climate were studied. We examined long-term records of the spring air temperature on the north-western coast of North America (ATNA; 40–50°N, 130–110°W) reconstructed from tree rings, and the sardine catch records inferred from documents dating from 1600 to 1990. High sardine catches occurred eight times in this period, and each high catch continued for 7–45 years. We found a significant difference in mean ATNAs between the abundant and poor catch periods: high (low) catch occurred in periods of high (low) ATNA. ATNA was negatively correlated with spring sea-surface temperature east of Japan (SSTJ; 36–40°N, 150–160°E), where the sardine possibly migrate north-eastward, a relation which was confirmed from 1940 to 1990. In years when the Aleutian Low Pressure System (AL) shifted south-east and intensified, the westerly wind was strong east of Japan along the south-western edge of the AL, resulting in low SSTJ; a warm south-westerly wind blows in the west coast of North America along the south-eastern edge of the AL. If we assume that this relation between ATNA and SSTJ can be extended back to the 1600s, high (low) catches occur in the period when SSTJ is low (high). This relation between sardine catch and SSTJ is consistent with previous studies based on data from after 1900. The present results suggest that long-term variations in Japanese sardine are related to interdecadal North Pacific ocean/climate variability. 相似文献
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Masanobu Matsuoka 《Fisheries Science》2001,67(6):1036-1045
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以日本长崎县沿岸海域捕捞的远东拟沙丁鱼作为鱼糜制品的原料,测定其凝胶形成能,结果如下:随着冰藏时间的延长,凝胶形成能迅速降低,采用碱盐水漂洗可使产品的凝胶弹性显著增强;凝胶化温度在60-70℃间是劣化温度带;另外,原料鱼的捕捞季节对产品质量也有显著影响。 相似文献