Примеры использования Acoustic transects на Английском языке и их переводы на Русский язык
{-}
-
Official
-
Colloquial
Acoustic transects* or research net hauls.
Identify data required from the krill fishery e.g. standardised acoustic transects and net hauls.
The acoustic transects will be made independently during the non-fishing periods.
Acoustic data will be collected along transect, with mesoscale acoustic transects undertaken at each of approximately eight main stations.
Acoustic transects shall be conducted using a scientific-quality echosounder collecting information at 120 kHz.
In cases where Contracting Parties select plans(iii), acoustic transects by fishing vessels, or(iv), research trawls by fishing vessels, from the list in paragraph 4 above.
Acoustic transects shall be conducted using a scientific-quality echosounder collecting information at a minimum frequency of 38 kHz with a minimum observing depth of 200 m.
The minimum distance between the start and end points of a transect shall be 30 n miles,and a set of acoustic transects is defined as two transects separated by at least 10 n miles.
Figure 2(c): Location of acoustic transects(T1 to T18) and the calibration site(Stromness Bay) at South Georgia Subarea 48.3.
Draft instruction documentation on instrument setup Simrad ES60 Open-ocean data logging This set of instructions describes how to set up the Simrad ES60 38 kHz 7 beamwidth echosounder to record data during acoustic transects.
Figure 2(a): Location of acoustic transects(T1 to T24) and the calibration site(Admiralty Bay) at the South Shetland Islands Subarea 48.1.
In response to the suggestion from SG-ASAM on the need to examine incentives for vessels to undertake these transects, the Working Group encouraged all Members, particularly those engaged in the krill fishery,to propose implementable incentives and/or regulations to promote the undertaking of those krill acoustic transects Annex 4, paragraphs 4.1 and 4.2.
Plans(iii) acoustic transects by fishing vessels, and(iv) research trawls by fishing vessels, from the list in paragraph 4 above shall be conducted as follows.
During normal exploratory fishing operations, vessels can choose to fish in any exploratory unit,however one set of acoustic transects or one set of research hauls must be conducted in each exploratory unit visited during normal fishing operations.
All acoustic transects, both during normal exploratory fishing operations and research operations, shall be accompanied by at least one net haul.
Trawls that accompany acoustic transects can be conducted during the transect or immediately after the completion of the transect. .
If the vessel undertakes plan(iii), acoustic transects by fishing vessels, or plan(iv), research trawls by fishing vessels, before normal exploratory fishing operations, then the research plan shall be conducted as follows.
Trawls that accompany acoustic transects shall be at least 0.5 h in duration, or of sufficient time to achieve a representative sample, and the data collected from these hauls shall be the same as those required for research hauls.
In cases where Contracting Parties select plans(iii), acoustic transects by fishing vessels, or(iv), research trawls by fishing vessels, from the list in paragraph 4 above, 213 51-04 vessels participating in exploratory krill fisheries may carry out the research plan either before(preferred option) or after normal exploratory fishing operations.
Every acoustic transect shall be a randomly located continuous path travelled at constant speed of 10 knots or less and in a constant direction.
If possible, collect acoustic data along existing transects shown in Figure 1.
The Kwangja-Ho was used to collect both ES70 and calibrated EK60 acoustic data along two transects.
The Subgroup agreed that collecting acoustic data on CCAMLR transects(SC-CAMLR-XXXIII, Annex 4, Table 2) was a priority activity.
The Subgroup identified seven instrument settings/parameters that should be set to pre-specified values as part of the instrument setup for collecting acoustic data on transects Table 5.
Level 1(directed survey)- Acoustic survey along multiple transects in a defined area with a survey effort commensurate with current scientific biomass surveys.
The Working Group noted therecommendation of SG-ASAM-14 and agreed that collecting acoustic data on CCAMLR transects was a priority activity SC-CAMLR-XXXIII, Annex 4, Table 2.
The Subgroup reiterated its request for krill fishing vessels to collect acoustic data along the nominated transects SC-CAMLR-XXXV, Annex 4, paragraphs 2.1 and 2.2.
The key metadata requirements for acoustic data collected on transects are identified in Table 4 and the Subgroup recommended that all date and time data associated with acoustic data collection should be reported as UTC.
Two-frequency(38 and 120 kHz) acoustic data were collected along transects using an EK60 echosounder and net samples were collected using a midwater trawl 15 mm codend mesh size of inner net.
The Subgroup agreed that collecting acoustic data from fishing vessels along transects defined as part of previous/ongoing krill surveys has the potential to add significant value to the interpretation of fisheries acoustic data including to.