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nmfs-fish-tools / fishdictionary

A dictionary scheme for fisheries
https://connect.fisheries.noaa.gov/fishdictionary
GNU Affero General Public License v3.0
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ssb vs. sb #8

Open kellijohnson-NOAA opened 2 years ago

kellijohnson-NOAA commented 2 years ago

It seems weird to me that we use spawning stock biomass but do not add the "stock" modifier to any other term, e.g., we use age 3+ biomass not age 3+ stock biomass. Should we advocate for spawning biomass instead of spawning stock biomass?

chantelwetzel-noaa commented 2 years ago

I totally agree. It feels like "SSB" and "spawning stock biomass" is a legacy term that is no longer used when describing results. I would be okay attempting to move away from this but we may want to ask around a bit to understand why spawning stock biomass was initial used.

kellijohnson-NOAA commented 2 years ago

Sounds good. I will ask Hastie, Jon Brodziak, and Chris Legault. Let me know if you think of others. The Australian glossary just lists "spawning biomass" so I am assuming this will be fine.

kellijohnson-NOAA commented 2 years ago

@Bai-Li-NOAA can you quantify the use of spawning biomass (SB) versus spawning stock biomass (SSB) in the stock assessments?

Bai-Li-NOAA commented 2 years ago

@kellijohnson-NOAA. Yes. Will do that today and share the outputs with you!

Here is the summary statistics from 10 assessment reports: <html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:x="urn:schemas-microsoft-com:office:excel" xmlns="http://www.w3.org/TR/REC-html40">

ID | File_Name | spawning stock biomass\|ssb\|spawning stock output | spawning biomass\|sb -- | -- | -- | -- 1 | BSAIatka.pdf | 6 | 66 2 | c-6-attachment-1-full-assessment-electronic-only-status-of-lingcod-ophiodon-elongatus-along-the-northern-u-s-west-coast-in-2021.pdf | 25 | 50 3 | g-5-attachment-3-draft-full-assessment-of-status-of-the-pacific-spiny-dogfish-shark-resource-off-the-continental-u-s-pacific-coast-in-2021-electronic-only.pdf | 8 | 9 4 | kuriyama_et_al_2020_sardine_assessment.pdf | 52 | 43 5 | noaa_17252_DS1.pdf | 0 | 0 6 | noaa_21164_DS1.pdf | 0 | 3 7 | noaa_24818_DS1.pdf | 10 | 1 8 | S52_Final_SAR_v2.pdf | 119 | 79 9 | S57_Final_SAR.pdf | 19 | 24 10 | SEDAR65_FullSAR_12.8.2020_V3.pdf | 2 | 13   | Total | 241 | 288

Modify key terms from key_terms_frequency.R using the code below would reproduce the results:

key_terms <- c(
  "spawning stock biomass|ssb|spawning stock output",  
  "spawning biomass|sb"
)

xlabels <- c(
  "SSB",
  "SB"
)

Here | symbol represents or.

kellijohnson-NOAA commented 2 years ago

Responses include the following

"Spawning stock biomass" is one word too long for me.
I think the history of usage has to do with the nature of the
industrial (e.g., distant water, pre-1980s) fisheries to catch everything that
was available, i.e., the stock, both juveniles and adults and this made it useful
to distinguish between the immature and mature catch biomass.
the earliest we've seen the term spawning stock biomass is 1966
in a [Pacific sardine assessment](https://www.biodiversitylibrary.org/item/53858#page/36/mode/1up).
It has been used for so long on the east coast of the US that I hadn't ever thought
about where the "stock" came from in the term.
...
It will take a while to train our Councils that SB is the same thing as SSB,
but I'm sure that it can be done.