Add to ORKGAn essentially pure aggregation of 0-group herring in Altafjord in northern Norway was acoustically surveyed on each of the first three days of December 1991. Measurements were made at 38 kHz during each survey and at 120 kHz during part of the second survey and all of the third survey. The data are expressed in terms of the area backscattering coefficient, applicable to the entire water column and averaged over intervals of 0.1 nautical mile. The spatial structure of the aggregation is characterized by the variogram. By means of geostatistics, estimates of abundance over the survey area are supplemented by estimates of variance
The spawning stock of Norwegian spawning herring has been surveyed when wintering in the Vestfjord, ...
A large concentration of wintering herring was surveys continuously with acoustics over 37 hours in ...
Standard geostatistical techniques provide effective methods for estimating the global abundance and...
An essentially pure aggregation of 0-group herring in Altafjord in northern Norway was acoustically ...
An essentially pure aggregation of 0-group herring in Altafjord in northern Norway was acoustically...
The abundance of the mature component of the stock of Norwegian spring spawning herring has been est...
The abundance of the mature component of the stock of Norwegian spring spawning herring has been es...
The spawning component and part of the juvenile stock of Norwegian spring spawning herring have been...
In January 1996 the stock of Norwegian spring-spawning herring (Clupea harengus) was acoustically s...
In January 1996 the stock of Norwegian spring-spawning herring (Clupea harengus) was acoustically s...
A series of acoustic surveys of the adult component of the Norwegian spring-spawning herring was con...
A series of acoustic surveys of the adult component of the Norwegian spring-spawning herring was co...
A large concentration of wintering herring was surveys continuously with acoustics over 37 hours in ...
A large concentration of wintering herring was surveys continuously with acoustics over 37 hours in ...
The spawning stock of Norwegian spawning herring has been surveyed when wintering in the Vestfjord,...
The spawning stock of Norwegian spawning herring has been surveyed when wintering in the Vestfjord, ...
A large concentration of wintering herring was surveys continuously with acoustics over 37 hours in ...
Standard geostatistical techniques provide effective methods for estimating the global abundance and...
An essentially pure aggregation of 0-group herring in Altafjord in northern Norway was acoustically ...
An essentially pure aggregation of 0-group herring in Altafjord in northern Norway was acoustically...
The abundance of the mature component of the stock of Norwegian spring spawning herring has been est...
The abundance of the mature component of the stock of Norwegian spring spawning herring has been es...
The spawning component and part of the juvenile stock of Norwegian spring spawning herring have been...
In January 1996 the stock of Norwegian spring-spawning herring (Clupea harengus) was acoustically s...
In January 1996 the stock of Norwegian spring-spawning herring (Clupea harengus) was acoustically s...
A series of acoustic surveys of the adult component of the Norwegian spring-spawning herring was con...
A series of acoustic surveys of the adult component of the Norwegian spring-spawning herring was co...
A large concentration of wintering herring was surveys continuously with acoustics over 37 hours in ...
A large concentration of wintering herring was surveys continuously with acoustics over 37 hours in ...
The spawning stock of Norwegian spawning herring has been surveyed when wintering in the Vestfjord,...
The spawning stock of Norwegian spawning herring has been surveyed when wintering in the Vestfjord, ...
A large concentration of wintering herring was surveys continuously with acoustics over 37 hours in ...
Standard geostatistical techniques provide effective methods for estimating the global abundance and...