Примеры использования Biomass estimation на Английском языке и их переводы на Русский язык
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CCAMLR acoustic protocol recommends biomass estimation using 120 kHz.
The biomass estimation bias is lowest for populations calculated after one year of tag liberty.
Vessel instrument settings and metadata requirements for biomass estimation- see Table 3.
It is suggested that subsequent biomass estimation and summarising through delineated strata will improve accuracy of survey results.
The Subgroup recognised the importance of quantifying the total uncertainty in the biomass estimation process.
Table 1: Research objective for biomass estimation this also includes estimates of quantitative variables such as Sv or NASC.
The most rigorous protocols are required for acoustic data used for biomass estimation and stock assessment.
The krill identification and biomass estimation using the CCAMLR-approved method produced maximum densities in 500 m sampling intervals greater than 10 000 g m-2.
Data from space-borne sensors had been used for forest mapping,monitoring and biomass estimation in China since the 1980s.
Dr Jarvis noted that survey designs can be optimised for biomass estimation or stock dispersion, but compromises are generally necessary when the survey has multiple objectives.
The data were processed and analysed following CCAMLR standard protocols for noise removal,krill identification and biomass estimation.
The flowchart is comprised of three phases:a prospecting phase, biomass estimation phase and an assessment development phase Figure 10.
Abundance of krill at a defined temporal and spatial scale, e.g. management area(or subarea) orfishing zone referred herein as‘biomass estimation.
The Working Group noted that recovery of tagged fish,and therefore biomass estimation, was most likely in research blocks 883_3, 883_4 and 883_5.
CCAMLR has a set of stringent standard protocols for acoustic methods to increase the accuracy andminimise uncertainties in the biomass estimation.
While aggregated data are still appropriate to use for biomass estimation, the present work would not have been possible to be carried out using aggregated data.
In this context, core information is understood to be concerned with the state and change of forest cover worldwide,including destination of change and biomass estimation.
The continued use of 120 kHz as de facto frequency for krill biomass estimation is likely a consequence of the presently limited number of 70 kHz echosounders installed for data collection.
As a step in this direction, Dr Jarvis presented a flowchart which attempts to summarise andillustrate the general steps involved from acoustic data collection to krill biomass estimation.
The Working Group noted that the Division 58.4.4 research plan is now catch-limited(biomass estimation- assessment development phase) Table 11.
The Working Group recalled that for biomass estimation from acoustic surveys, the important measure is the range of krill lengths in an associated biological sample, where the distribution between vessels was very similar.
The Subgroup recalled that 70 kHz had been acknowledged as the optimal frequency for krill biomass estimation by the Subgroup several times before.
He underlined that the CCAMLR protocol for data collection and biomass estimation from acoustic surveys was developed based on the CCAMLR-2000 Survey for data collected during daytime in austral summer conditions only, whereas the protocol when applied to fishing vessel transect data should also consider different conditions for data collection.
Therefore, the phase of the research can, for example,be considered as intermediate between the biomass estimation phase and the assessment development phase.
The Subgroup noted the discussion of WG-EMM-15/17 Rev. 1(SC-CAMLR-XXXIV, Annex 6, paragraphs 2.53 to 2.58) and the request therein for clarification of the correct orientation parameters identified and that there has been confusion in the implementation of the stochastic distorted-wave Born approximation(SDWBA)to target identification and biomass estimation.
The Working Group agreed that some spreading mechanism was desirable in the biomass estimation phase to ensure that the research covered the spatial extent of tags that had previously been released in the research area.
The Echoview swarm template is developed to pursue an alternative approach to the CCAMLR procedure for biomass estimation from transect line acoustic surveys.
Examples of ongoing projects were presented, with a particular focus on the enhancement of the accuracy of medium- andlow-resolution satellite imagery for better biomass estimation.
The Subgroup agreed that an appropriate survey design would depend on the research objective(biomass estimation(1) versus spatial organisation of krill(2) above) and the equipment and sampling effort that could be allocated by the fishing vessel.
Data collection protocols for krill biomass estimates 2.29 The Subgroup agreed a set of minimum requirements for the collection of acoustic data for quantifiable krill biomass estimation data.