Stable Bottom Detection and Optimum Bottom Offset for Echo Integration of Demersal Fish.
نویسندگان
چکیده
منابع مشابه
Subsidies to high seas bottom trawl fleets and the sustainability of deep-sea demersal fish stocks
The life spans of demersal species of fishes occurring in deep-waters are much longer and their potential growth rates much lower than those of related shallow water species. As a result, deep-sea demersal fish species are more vulnerable to exploitation. This is because low growth rates relative to the available market discount rate for capital makes it desirable for fishing firms to mine, rat...
متن کاملWhen does fishing lead to more fish? Community consequences of bottom trawl fisheries in demersal food webs.
Bottom trawls are a globally used fishing gear that physically disturb the seabed and kill non-target organisms, including those that are food for the targeted fish species. There are indications that ensuing changes to the benthic invertebrate community may increase the availability of food and promote growth and even fisheries yield of target fish species. If and how this occurs is the subjec...
متن کاملEffects of bottom trawling on fish foraging and feeding
The effects of bottom trawling on benthic invertebrates include reductions of biomass, diversity and body size. These changes may negatively affect prey availability for demersal fishes, potentially leading to reduced food intake, body condition and yield of fishes in chronically trawled areas. Here, the effect of trawling on the prey availability and diet of two commercially important flatfish...
متن کاملA Bottom-Up Approach for Integration of XML Sources
XML raises as the standard for semistructured data representation and data exchange in the Web. In this context, data integration mechanisms are required to provide an unified view of semantically related information of a same domain. In this paper, a bottom-up integration process is proposed to solve such problem. In this approach, an ontology is generated from the semantic integration of conc...
متن کاملExperimental and Numerical Investigation of Bottom Outlet Hydraulic Model
Using experimental models along with conducting numerical analysis have been widely used in performance recognition and optimization of hydraulic equipments. Numerical modeling has lower cost rather than experimental one; however practical tests are commonly used because of the hydraulic structure importance especially in dams. Meanwhile numerical methods could be used for future designs throug...
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ژورنال
عنوان ژورنال: NIPPON SUISAN GAKKAISHI
سال: 1995
ISSN: 1349-998X,0021-5392
DOI: 10.2331/suisan.61.43