Results 11 to 20 of about 34,820 (308)
Scientia Marina, 2002 An international bottom trawl survey (the MEDITS programme) has been carried out every year in the Mediterranean since 1994. During each survey, about 1000 hauls are done by a fleet of 8 to 11 vessels from 10 to 800 m depth, applying a unique ...
Jacques Bertrand +3 more
doaj +5 more sources
The effect of autotrawl systems on the performance of a survey trawl [PDF]
, 2006 Three aspects of a survey bottom trawl performance—1) trawl geometry (i.e., net spread, door spread, and headrope height); 2) footrope distance off-bottom; and 3) bridle distance off-bottom—were compared among hauls by using either of two autotrawl ...
Kotwicki, Stan +2 more
core +4 more sources
, 2023 The ICES survey protocol for offshore beam trawl surveys describes the current methodologies, stratification and sample processing used in the offshore beam trawl surveys that provide fisheries-independent information to the fish stock assessments for a variety of flatfish species.
de Boois, Ingeborg J. +7 more
openaire +2 more sources
Известия ТИНРО, 2016 Geometric parameters of the bottom trawl DT 27.1/24.4 were tested aboard RV TINRO in the Bering Sea using the acoustic equipment «Scanmar» (Norway). Possible errors in the estimates of marine organisms abundance by bottom trawl survey are calculated for ...
Egor A. Zakharov, Pavel O. Emelin
doaj +1 more source
TSDV: A GIS tool for inspecting trawl survey data [PDF]
ICES Journal of Marine Science, 2002 No abstracts are to be cited without prior reference to the author.The TSDV is a tool for preliminary analyses of data produced by the surveys. The results obtained are a solid starting point for a more detailed study focusing on the knowledge of the distribution, the abundance and the population dynamics of demersal species.
Fortunati L, Garofalo G, Demontis R
openaire +2 more sources
Genetic evidence for wide distribution of the alien prawn-goby, Vanderhorstia mertensi (Actinopterygii: Perciformes: Gobiidae), along the northeast Mediterranean [PDF]
Acta Ichthyologica et Piscatoria, 2009 Vanderhorstia mertensi Klausewitz, 1974, is a recently acknowledged alien fish in theMediterranean Sea, hitherto observed only from Fethiye Bay, Turkey.
M.B. Yokes +4 more
doaj +3 more sources
Design and redesign of a bottom trawl survey in Chesapeake Bay, USA
Frontiers in Marine Science, 2023 Fisheries-independent surveys that reliably sample a broad size range of exploited and ecologically important species provide valuable data in support of fisheries management and ecosystem science.
Robert J. Latour +2 more
doaj +1 more source
Egyptian Journal of Aquatic Research, 2017 Mediterranean young-fish oriented experimental bottom trawl surveys represent a precious source of information on both past and current standing stocks and their life history traits and exploitation state.
T. Bottari, P. Rinelli, S. Ragonese
doaj +1 more source
Some updates to the method for calculation of parameters of bottom trawl system
Известия ТИНРО, 2016 The method for calculation of geometric parameters of trawl system proposed by F.I. Baranov is analyzed. The calculation includes evaluation of spacer force and drag for all elements of trawl system and solution of transcendental equation to find a ...
Egor A. Zakharov, Oleg N. Kruchinin
doaj +1 more source
Efficiency of the bottom trawl used for the Mediterranean International Trawl Survey (MEDITS) [PDF]
, 1999 The aim of the work presented in this paper was to assess the relative efficiency of the GOC 73 sampling trawl used for the Mediterranean international trawl survey programme (MEDITS) compared with that of a typical Italian commercial trawl. The latter was chosen because it is commonly used by fishermen in the central Adriatic, where the experiment was
Fiorentini, Loris +4 more
openaire +1 more source