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update right whale tech doc page
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applied suggestions made by Dan Linden submitted for SOE 2024
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BBeltz1 committed Apr 5, 2024
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**Indicator category**: Synthesis of published information; Published methods

**Contributor(s)**: Christopher D. Orphanides
**Contributor(s)**: Debra Palka

**Data steward**: Chris Orphanides, chris.orphanides@noaa.gov
**Data steward**: Debra Palka, debra.palka@noaa.gov

**Point of contact**: Richard Pace, richard.pace@noaa.gov
**Point of contact**: Daniel Linden, daniel.linden@noaa.gov

**Public availability statement**: Source data are available from the New England Aquarium upon request. Derived data are available [here](http://comet.nefsc.noaa.gov/erddap/tabledap/protected_species_soe_v1.html).

## Methods

### Data sources
The North Atlantic right whale abundance estimates were taken from a published document [see @Pace2017], except for the most recent 2016 and 2017 estimates. Abundance estimates from 2016 and 2017 were taken from the 2016 National Oceanographic and Atmospheric Administration marine mammal stock assessment [@Hayes2017] and an unpublished 2017 stock assessment.
The North Atlantic right whale abundance estimates were taken from a published document [see @Linden_pop_2023].

Calves birth estimates are taken from a published report [@narw2019] put out yearly by the North American Right Whale Consortium.
Calves birth estimates are available in @Pace2017, with more recent years shared [here](https://www.fisheries.noaa.gov/gallery/north-atlantic-right-whale-calving-season-archive).

### Data extraction
Data were collected from existing reports and validated by report authors.

### Data analysis
Analysis for right whale abundance estimates is provided by @Pace2017, and code can be found in the [supplemental materials](https://onlinelibrary.wiley.com/action/downloadSupplement?doi=10.1002%2Fece3.3406&file=ece33406-sup-0001-SupInfo.docx).
Analysis for right whale abundance estimates is based on methods by @Pace2017, as documented most recently by @Linden_pop_2023. Data and code can be found in the following Github repository: [NEFSC/PSD-NARW_popsize](https://github.com/NEFSC/PSD-NARW_popsize).

### Data processing

Time series of right whale and calf abundance estimates were formatted for inclusion in the `ecodata` R package using this R [code](https://github.com/NOAA-EDAB/ecodata/blob/master/data-raw/get_narw.R).

**catalog link**
<https://noaa-edab.github.io/catalog/narw.html>
Time series of right whale and calf abundance estimates were formatted for inclusion in the `ecodata` R package using this R [code](https://github.com/NOAA-EDAB/ecodata/blob/master/data-raw/get_narw.R).

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