Примеры использования Trawl survey на Английском языке и их переводы на Русский язык
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TrawlCI Estimation of Abundance from Trawl Surveys.
Combining acoustic and trawl survey data should improve estimates of the standing stock for.
Gunnari in Subarea 48.3 based on the random stratified bottom trawl survey.
The results from the annual random stratified trawl survey to estimate the abundance of.
The original bottom trawl survey design used in previous years will be repeated to maintain continuity of the time series.
The Working Group noted that currently the assessment assumes the trawl survey has a q 1.
This included information on trawl surveys, tagging data inputs and estimates of unaccounted fishing mortality.
The other use of these limits, to enable research trawl surveys, was not considered.
Further, the Working Group noted that successful assessments in Subarea 48.3 andDivision 58.5.2 have also included data collected from trawl surveys.
Investigations provided in previous years showed that bottom trawl surveys significantly underestimate.
Random stratified trawl survey abundance-at-age data for 2010 and 2011(see paragraph 6.9) were included along with those from 2008 and 2009.
WG-EMM-16/P03 reported the update of the annual Norwegian standard acoustic trawl survey WG-EMM-15/54.
The random stratified trawl survey consisted of 158 stations and included an additional five stations at Shell Bank, which had not been sampled since 2005.
The Working Group noted that Australia had undertaken a random stratified trawl survey in Division 58.5.2 during April-May 2013 WG-FSA-13/21.
Ageing in the Indian Ocean sector andat South Georgia is currently accomplished using modes of length-frequency distributions collected during trawl surveys.
The Scientific Committee noted that Australia had undertaken a random stratified trawl survey in Division 58.5.2 during June 2014, using a demersal trawl. .
The Working Group recommended that Members consider collating bathymetric data to develop updated bathymetric grids for other areas where recent multi-beam data orsinglebeam echo soundings exist and trawl surveys are conducted.
Fish were collected with varying gear and deposit of specimens;also trawl surveys and a few individual observations, e.g. by anglers or divers.
The study considered the acoustic density of icefish in 6 m and 8 m depth bands above the bottom andindicated that a 2 m difference in headline height could produce a 1.8-fold difference in the trawl survey biomass estimate for icefish.
During the comprehensive Mediterranean International Trawl Survey program from 1995 to 1999, only two angelsharks were captured from 9,905 trawls. .
She recalled that the Russian trawl acoustic survey in 2002 revealed that a bottom trawl survey significantly underestimates.
Under this approach, estimates of cohort biomass from the trawl surveys were considered as absolute, and were projected forward under certain assumptions of growth and M to provide short-term yield estimates.
Dr Ziegler also notified the Working Group that Australia plans to conduct its annual random stratified trawl survey in Division 58.5.2 in 2019.
The Working Group noted that the integration of acoustic data collection with trawl survey data could potentially allow total stock biomass to be estimated and should be explored as future work.
From 1989 to 1991 assessments were performed annually during WG-FSA using VPA tuned using indices of abundance from either:(i)CPUE data from the commercial fishery; or(ii) research trawl surveys to estimate size and age of the population.
Abundance estimates from the acoustic survey will be combined with those from the trawl survey to provide total estimates of abundance that include both the pelagic and benthic components.
In the first three years, 14 courses have been offered in a wide variety of skills, including stock assessment(introductory and advanced), ecosystem modelling, model building, management strategy evaluation, Bayesan inference,fisheries advice, trawl survey design and evaluation and integrated ecosystem assessment.
Data available include an estimate of biomass from a random stratified trawl survey in 2006, catch-at-length frequencies, CPUE time series from commercial fisheries, and tag-recapture data from 2006 to 2010.
The new age data from over 2 000 fish sampled from the 2012-2014 random stratified trawl surveys and from the 2013 commercial fishery were included in the stock assessment presented in WG-FSA-14/34, which improved the information available on fish older than 20 years and led to a re-estimation of the von Bertalanffy growth parameters.
There are occasional scientific surveys using similar methods(e.g. the trawl surveys conducted by some CCAMLR Members) in some areas or subareas, and these provide more direct observations on stock status.