2023 NMFS GOA/AI Trawl Survey data

[hutniczak]

Data product requested (stratum CPUE, etc.): CATCH, LENGTH, HAUL, BIOMASS, SIZECOMP (details below) for 2023

Species: Pacific halibut

Region (GOA, AI, Bering Sea): All

Research team making the request: International Pacific Halibut Commission - Barbara Hutniczak, Fisheries Regulations & Data Services Branch manager (Barbara.Hutniczak@iphc.int) and IPHC data services (iphc_dataservices@iphc.int)

Details: • CATCH o CRUISEJOIN o HAULJOIN o CATCHJOIN o REGION o VESSEL o CRUISE o HAUL o SPECIES_CODE o WEIGHT o NUMBER_FISH • LENGTH o CRUISEJOIN o HAULJOIN o CATCHJOIN o REGION o VESSEL o CRUISE o HAUL o SPECIES_CODE o LENGTH o FREQUENCY o SEX o SAMPLE_TYPE o LENGTH_TYPE • HAUL o CRUISEJOIN o HAULJOIN o REGION o VESSEL o CRUISE o HAUL o HAUL_TYPE o PERFORMANCE o START_TIME o DURATION o DISTANCE_FISHED o NET_WIDTH o NET_MEASURED o NET_HEIGHT o STRATUM o START_LATITUDE o END_LATITUDE o START_LONGITUDE o END_LONGITUDE o STATIONID o GEAR_DEPTH o BOTTOM_DEPTH o BOTTOM_TYPE o SURFACE_TEMPERATURE o GEAR_TEMPERATURE o WIRE_LENGTH o GEAR o ACCESSORIES o SUBSAMPLE • BIOMASS o SPECIES_CODE o SPECIES_NAME o COMMON_NAME o YEAR o STRATUM o MEANWGTCPUE o VARMNWGTCPUE o BIOMASS o VARBIO o LOWERB o UPPERB o DEGREEFWGT o MEANNUMCPUE o VARMNNUMCPUE o POPULATION o VARPOP o LOWERP o UPPERP o DEGREEFNUM o HAULCOUNT o CATCOUNT o NUMCOUNT o LENCOUNT • SIZECOMP (abundance) o SPECIES_CODE o SPECIES_NAME o COMMON_NAME o YEAR o STRATUM o LENGTH o MALES o FEMALES o UNSEXED o TOTAL

If available, please share by 10 October 2023. Any assistance you can provide would be greatly appreciated.

[NancyRoberson]

Hi Ned and Duane, Where can I find the BIOMASS and SIZECOMP data for 2023 surveys? I already have the catch, haul, and length data. Thanks

[Ned-Laman-NOAA]

For the Gulf, it looks to me like they are interested in stratum-level biomass and length composition which you can find in these two tables GOA.BIOMASS_STRATUM and GOA.SIZECOMP_STRATUM.

[hutniczak]

Hi there, The Biomass table that we received in the past includes:

[hutniczak]

The Sizecomp table includes:

[hutniczak]

These two tables would include full time series

[Ned-Laman-NOAA]

When you say "full time series" you're referring to just the Gulf of Alaska for this request, right?

[hutniczak]

When you say "full time series" you're referring to just the Gulf of Alaska for this request, right?

For each of the conducted surveys - including Bering Sea and Aleutian Islands too.

[NancyRoberson]

Hi All,

Attached below are the catch, haul, length data for the 2023 EBS, NBS, & GOA surveys.
Also attached are the GOA halibut biomass and size comp data for all years.
Please look over the data for correctness and let me know if you need changes made.

I will get the EBS & NBS biomass and size comp data to you early next week.

IPHC 2023_CATCH_AllSurveys.xlsx IPHC 2023_GOA_SIZECOMP_STRATUM_AllYears.xlsx IPHC 2023_HAUL_AllSurveys.xlsx IPHC 2023_LENGTH_AllSurveys.xlsx IPHC_GOA BIOMASS_STRATUM_AllYears.xlsx

[NancyRoberson]

Hi Barbara, Our EBS/NBS data manager is out today - we will get the EBS and NBS sizecomp and biomass data to you tomorrow (Tuesday).

[hutniczak]

Thank you for sharing the requested data - and we look forward to receiving the remaining tables.

We will let you know if we have any questions as we work through our stock assessment data prep.

[RebeccaHaehn-NOAA]

Linked below are the halibut data for the EBS and NBS.

IPHC 2023 Haul_nbs.csv IPHC 2023 Length_ebs.csv IPHC 2023 Length_nbs.csv IPHC 2023 Catch_ebs.csv IPHC 2023 Catch_nbs.csv IPHC 2023 Haul_ebs.csv IPHC 2023 sizecomp_ebs_plusnw.csv IPHC 2023 sizecomp_nbs.csv IPHC 2023 biomass_ebs_plusnw.csv IPHC 2023 biomass_nbs.csv

[NancyRoberson]

Thanks Rebecca! Barbara, let us know if you have questions or need more data.

[hutniczak]

Hi @NancyRoberson,

Thanks for very efficiently accommodating IPHC's stock assessment data needs.

We have one additional request. In the past, we have been provided with the total expanded biomass estimates for the GOA (and AI) rather than the strata-specific estimates only. The EBS and NBS results include stratum 999 which represents the total, but not the GOA file.

We are not clear whether there are any additional methods beyond summing the strata and calculating the combined variance, but for consistency with the historical series and quantities used elsewhere, we would prefer to use the AFSC’s official “total” biomass estimate rather than calculating it by ourselves. Is this something that can be easily added to our request?

[Ned-Laman-NOAA]

Total Biomass is available for both Gulf and Alaska surveys on the AKFIN public-facing database (https://akfin.psmfc.org/). You will need to set up an account if you don't already have one though.

[NancyRoberson]

Hi Basia,

I believe these are the halibut total biomass data you are requesting - they are the same as the the file you sent me except that they include 2022 and 2023 data.

AI_BIOMASS_TOTAL_HALIBUT.xlsx GOA_BIOMASS_TOTAL_HALIBUT.xlsx Basia file_HALIBUTTOTALBIOMASS21.xlsx

I need to defer the following question to Ned " Our main concern is the consistency of methods applied. As mentioned earlier, it’s not clear to us whether there are any additional methods beyond summing the strata and calculating the combined variance from the biomass file we already received."