gov.noaa.nmfs.inport:35796
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dataset
CSV Files
Pacific Islands Fisheries Science Center
808-725-5300
1845 Wasp Blvd.
Honolulu
HI
96818
USA
http://www.pifsc.noaa.gov
WWW:LINK-1.0-http--link
Website
Website for this organization
information
8:00 a.m. - 4:30 p.m.
resourceProvider
DesRochers, Annette M
(808)725-5461
1845 Wasp Blvd.
Honolulu
HI
96818
annette.desrochers@noaa.gov
8 am - 5 pm
Email preferred
pointOfContact
2024-02-29T00:00:00
ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data
ISO 19115-2:2009(E)
Monk Seal Ecosystem Model Data: A Comparison of Ecosystem Structure and Energy Flows of Monk Seal Populations from Laysan Island and French Frigate Shoals in the Northwestern Hawaiian Islands
Monk Seal Ecosystem Model Data
2017-11-06
publication
NOAA/NMFS/EDM
35796
https://doi.org/10.3354/meps12320
https://www.fisheries.noaa.gov/inport/item/35796
WWW:LINK-1.0-http--link
Full Metadata Record
View the complete metadata record on InPort for more information about this dataset.
information
Pacific Islands Fisheries Science Center
808-725-5360
1845 Wasp Blvd.
Honolulu
HI
96818
pifsc.info@noaa.gov
https://www.pifsc.noaa.gov
WWW:LINK-1.0-http--link
Pacific Islands Fisheries Science Center Website
Pacific Island Fisheries Science Center homepage
information
8:00 a.m. - 4:30 p.m.
originator
Weijerman, Mariska
(808)725-5468
1845 Wasp Blvd.
Honolulu
HI
96818
mariska.weijerman@noaa.gov
Email preferred
author
https://ecopath.org
WWW:LINK-1.0-http--link
Ecopath with Ecosim (EwE)
Ecological/ecosystem modeling software website.
download
https://www.pifsc.noaa.gov/hawaiian_monk_seal/
WWW:LINK-1.0-http--link
Hawaiian Monk Seal Research
Pacific Islands Fisheries Science Center website.
download
tableDigital
Weijerman M, Robinson S, Parrish F, Polovina J, Littnan C (2017) Comparative application of trophic ecosystem models to evaluate drivers of endangered Hawaiian monk seal populations. Mar Ecol Prog Ser 582:215-229. https://doi.org/10.3354/meps12320
To understand various ecosystem dynamics that could explain observed changes and differences in monk seal biomass at French Frigate Shoals (FFS) and Laysan (LAY), Ecopath with Ecosim (EwE) version 6.4.4 modeling software was used to conduct two types of simulations, sensitivity (to understand the system) and hindcast (to evaluate drivers of monk seal population dynamics). EwE models for LAY and FFS were developed and model output was compared between the 2 models. The model output data included in the data sets represent the most important conclusions as reported in the publication from this study. These are (1) the mean of the last 5 years of each perturbation for sensitivity assessment; and (2) hindcast simulations. The first data set was used to understand the main drivers of the trophic structure and energy flow in the ecosystems. Four perturbation scenarios were simulated for a time span of 40 years (2010 through 2049): (a) baseline (compare static structural ecosystem composition between FFS and LAY), (b) altered predator abundance (30% decrease in biomass of main predators in the ecosystem), (c) altered monk seal prey abundance (30% decrease in biomass of main monk seal prey groups, with and without bottomfish to test how much bottomfish accounts for changes, and (d) altered primary productivity (change productivity annually by 10% for both phytoplankton and benthic algae through an annual forcing factor of 0.9 and 1.1 on both groups). The hindcast simulations were performed to evaluate the importance of historical stressors to monk seal population dynamics by selecting the best-fit model for the monk seal biomass time series (1998-2015). Stressors included were (a) fishing with time series based on commercial fishery data, (b) environment with time series of the monthly PDO index as a multiplier for primary productivity, (c) additional mortality simulated with a constant removal of monk seals of varied intensities, and (4) combinations of these 3 stressors (2a and 2c being the most important with regard to the observed trend in monk seal population). Time series observation data of monk seal biomass and benthic bottomfish biomass, as well as catch time series of bank sharks (only for FFS), benthic and demersal bottomfish, bank jacks, and macroheterotrophs (lobsters) were loaded into Ecosim for model fitting. Refer to Weijerman et al (2017) for complete details.
The main objective of this study was to understand the difference in ecosystem dynamics that could explain the observed decrease in monk seal biomass at French Frigate Shoals and the more stable biomass at Laysan. Specifically we investigated the relative influence of potential drivers---including primary productivity, prey population, and predation---on the monk seal populations in 40-year simulations and the external drivers of climate and fishing with an additional mortality on monk seals in hindcast simulations. Understanding the drivers and predictability of population trends will illuminate areas of focus for Hawaiian monk seal recovery efforts.
Pacific Islands Fisheries Science Center
completed
Littnan, Charles L
(808)725-5711
1845 Wasp Blvd.
Honolulu
HI
96818
charles.littnan@noaa.gov
Email preferred
pointOfContact
Weijerman, Mariska
(808)725-5468
1845 Wasp Blvd.
Honolulu
HI
96818
mariska.weijerman@noaa.gov
Email preferred
custodian
notPlanned
Numeric Data Sets > Biology
theme
CoRIS Discovery Thesaurus
EARTH SCIENCE > Biosphere > Ecological Dynamics
EARTH SCIENCE > Biosphere > Zoology > Vertebrates
EARTH SCIENCE > Oceans > Marine Biology > Marine Mammals
EARTH SCIENCE > Oceans > Marine Biology > Marine Mammals > Pinnipeds
theme
CoRIS Theme Thesaurus
BIOMASS
theme
NODC DATA TYPES THESAURUS
model output
theme
NODC OBSERVATION TYPES THESAURUS
US DOC; NOAA; NMFS; Pacific Islands Fisheries Science Center; Ecosystem Sciences Division
theme
NODC SUBMITTING INSTITUTION NAMES THESAURUS
COUNTRY/TERRITORY > United States of America > Hawaii > Honolulu > French Frigate Shoals (24N166W0001)
COUNTRY/TERRITORY > United States of America > Hawaii > Honolulu > Laysan Island (25N171W0001)
COUNTRY/TERRITORY > United States of America > Hawaii > Honolulu > Northwestern Hawaiian Islands (28N178W0000)
OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Northwestern Hawaiian Islands (28N178W0000)
OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Northwestern Hawaiian Islands > French Frigate Shoals (24N166W0001)
OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Northwestern Hawaiian Islands > Laysan Island (25N171W0001)
place
CoRIS Place Thesaurus
North Pacific Ocean
Papahanaumokuakea Marine National Monument
place
NODC SEA AREA NAMES THESAURUS
Ecopath with Ecosim
EwE
Hawaiian monk seal
PIFSC
PSD
Pacific Islands Fisheries Science Center
Protected Species Division
bottomfish fishery
ecological modeling
monk seal
recovery
theme
French Frigate Shoals
Laysan
NWHI
Northwestern Hawaiian Islands
PMNM
place
DOC/NOAA/NMFS/PIFSC > Pacific Islands Fisheries Science Center, National Marine Fisheries Service, NOAA, U.S. Department of Commerce
dataCentre
Global Change Master Directory (GCMD) Data Center Keywords
2017-04-24
publication
8.5
Ecosystem Modeling
project
InPort
otherRestrictions
Cite As: Pacific Islands Fisheries Science Center, [Date of Access]: Monk Seal Ecosystem Model Data: A Comparison of Ecosystem Structure and Energy Flows of Monk Seal Populations from Laysan Island and French Frigate Shoals in the Northwestern Hawaiian Islands [Data Date Range], https://www.fisheries.noaa.gov/inport/item/35796.
NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose.
otherRestrictions
Access Constraints: None
otherRestrictions
Use Constraints: Please cite PIFSC Ecosystem Sciences Division (ESD) when using the data.
Suggested citation:
Pacific Islands Fisheries Science Center, 2019: Monk Seal Ecosystem Model Data: A Comparison of Ecosystem Structure and Energy Flows of Monk Seal Populations from Laysan Island and French Frigate Shoals in the Northwestern Hawaiian Islands from 1998 through 2015, https://www.fisheries.noaa.gov/inport/item/35796.
otherRestrictions
Distribution Liability: While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such warranty.
unclassified
Not applicable
Not applicable
NOAA Data Management Plan (DMP)
NOAA/NMFS/EDM
35796
https://www.fisheries.noaa.gov/inportserve/waf/noaa/nmfs/pifsc/dmp/pdf/35796.pdf
WWW:LINK-1.0-http--link
NOAA Data Management Plan (DMP)
NOAA Data Management Plan for this record on InPort.
information
crossReference
eng; US
biota
Model outputs (Excel/csv files) were generated using Ecopath with Ecosim version 6.4.3.
-172
-166
23.5
26
Laysan and French Frigate Shoals of the Northwestern Hawaiian Islands.
Hindcast model output for 1998-2015 for which we had time series of monk and bottomfish biomass.
For system understanding we used the same base conditions (ground condition) and ran simulations for 40 years. | Currentness: Ground Condition
1998-01-01
2015-12-31
false
eng
false
Spreadsheet
Monk Seal Ecosystem Model Output Data for System Understanding
2019-05-08
publication
Monk Seal Ecosystem Model: observation data and output data hindcast
2019-05-08
publication
CSV - Comma Separated Values (Text)
CSV - Comma Separated Values (Text)
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CSV - Comma Separated Values (Text)
CSV - Comma Separated Values (Text)
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CSV - Comma Separated Values (Text)
National Centers for Environmental Information - Silver Spring, Maryland
(301) 713-3277
NOAA/NESDIS E/OC SSMC3, 4th Floor, 1351 East-West Highway
Silver Spring
MD
20910-3282
distributor
https://accession.nodc.noaa.gov/0190881
WWW:LINK-1.0-http--link
1a.Base.csv
Monthly output of ecosystem modeling data for the last 5 years of 40-year simulation run for Laysan and French Frigate Shoals with no additional drivers. This data set serves as the baseline.
download
https://accession.nodc.noaa.gov/0190881
WWW:LINK-1.0-http--link
1d.0.9xPrimaryProducers.csv
Monthly output of ecosystem modeling data for the last 5 years of 40-year simulation run for Laysan and French Frigate Shoals where we decreased Primary Producers by 10%.
download
https://accession.nodc.noaa.gov/0190881
WWW:LINK-1.0-http--link
1d.1.1xPrimaryProducers.csv
Monthly output of ecosystem modeling data for the last 5 years of 40-year simulation run for Laysan and French Frigate Shoals where we increased Primary Producers by 10%.
download
https://accession.nodc.noaa.gov/0190881
WWW:LINK-1.0-http--link
1b.30percent_DecreasePredatorBiomass.csv
Monthly output of ecosystem modeling data for the last 5 years of 40-year simulation run for Laysan and French Frigate Shoals where we decreased the biomass of the monk seal predators - Sea Birds, Tiger Sharks, Reef Sharks, Reef Jacks, Subphotic Piscivores - by 30%.
download
https://accession.nodc.noaa.gov/0190881
WWW:LINK-1.0-http--link
1c.30percent_DecreasePrey-Meso_BC_PK_FF_BB.csv
Monthly output of ecosystem modeling data for the last 5 years of 40-year simulation run for Laysan and French Frigate Shoals where we decreased in monk seal prey including bottomfish - Mesophotic Benthic Carnivores, Mesophotic Plantivores, Mesophotic Forage Fish, Bottomfish - by 30%.
download
https://accession.nodc.noaa.gov/0190881
WWW:LINK-1.0-http--link
1c.30percent_DecreasePrey-Meso_BC_PK_FF.csv
Monthly output of ecosystem modeling data for the last 5 years of 40-year simulation run for Laysan and French Frigate Shoals where we decreased monk seal prey - Mesophotic Benthic Carnivores, Mesophotic Plantivores, Mesophotic Forage Fish - by 30%.
download
https://accession.nodc.noaa.gov/0190881
WWW:LINK-1.0-http--link
2c.Fishery_plus_percent_removal.csv
Monthly output of ecosystem modeling data from 1998 through 2015 for Laysan and French Frigate Shoals where we included a bottomfish fishery and an additional mortality on monk seals to assess its importance on the observed trend in monk seal population. For Laysan, the best fit with the observed data was fishery + 1 % removal, and for French Frigate Shoals it was fishery + 7% removal.
download
https://accession.nodc.noaa.gov/0190881
WWW:LINK-1.0-http--link
2a.Fishery_only.csv
Monthly output of ecosystem modeling data from 1998 - 2015 for Laysan (LAY) and French Frigate Shoals (FFS) where we included a bottomfish fishery only to assess its importance on the observed trend in monk seal population.
download
https://accession.nodc.noaa.gov/0190881
WWW:LINK-1.0-http--link
Observation_data.csv
Monk seal observation data from 1998 - 2015 and bottomfish observation data from 1998 to 2010. These data sets were used to compare model output data with to assess which simulation has the best fit and is therefore most likely to explain the factors contributing to the monk seal trends.
download
dataset
Representativeness
Model output data (i.e., predictions) provide a range of potential answers based on the available data and should not be used for tactical management.
Accuracy
Monk seal biomass data comes from beach counts. Bottomfish biomass data was model derived based on stock assessments of the bottomfish fishery. All generated data is model derived and has some uncertainty associated with it.
Analytical Accuracy
Best-fit of model-simulated output data and observational data was based on the least square fitting criterion and summed the squared deviations. Additionally, the Akaike's information criterion (AIC) was calculated taking into account the small sample size.
Completeness Report
All available biological data for the areas of interest were used. Fishery data was limited to 2010 as NOAA discontinued stock assessments once the fishery was closed.
Conceptual Consistency
Data sets are model output data.
Input data was collected for the Ecopath with Ecosim model (EwE) from Parrish et al 2011; PIFSC Ecosystem Sciences Division data, monk seal data, bottomfish stock asessment data, and other sources defined in Weijerman et al 2017 MEPS. The model output data is generated with the EwE model. See Weijerman et al 2017 MEPS for details.
Fish species were aggregated into functional groups. All biomass data was converted to metric tons per square kilometer and used as input data for the EwE model. Rate parameters were calculated based on a weighted average by species composition in the functional groups. Landings data of bottomfish were aggregated by year for the spatial areas encompassing the two ecosystems of interest (Laysan and French Frigate Shoals). Model output data is reported without any additional process steps.
Weijerman, Mariska
(808)725-5468
mariska.weijerman@noaa.gov
processor
Source Contribution: Input data
Brodziak J, Moffitt R, DiNardo G. 2009. Hawaiian bottomfish assessment update for 2008. Pacific Islands Fisheries Science Center Administrative Report H-09-02, 93 p.
2009-03-02
publication
Pacific Islands Fisheries Science Center
https://www.pifsc.noaa.gov/library/pubs/admin/PIFSC_Admin_Rep_09-02.pdf
WWW:LINK-1.0-http--link
NOAA Pacific Islands Fisheries Science Center library: staff publications
Source Citation URL
information
publisher
Source Contribution: Input data
National Coral Reef Monitoring Program: Stratified Random Surveys (StRS) of Reef Fish, including Benthic Estimate Data of the Hawaiian Archipelago since 2013
Pacific Islands Fisheries Science Center
https://www.fisheries.noaa.gov/inport/item/24447
WWW:LINK-1.0-http--link
InPort: NOAA Fisheries Enterprise Data Management Program
Source Citation URL
information
originator
Source Contribution: Input data
National Marine Fisheries Service (2017) Hawaiian monk seal. In: Carretta JV, Forney KA, Oleson EM, Weller DW and others (eds) U.S. Pacific marine mammal stock assessments: 2016. NOAA-TM-NMFS-SWFSC-577, p 41รข48
2017-06-01
publication
Southwest Fisheries Science Center, SWFSC
https://doi.org/10.7289/V5/TM-SWFSC-577
WWW:LINK-1.0-http--link
NOAA Institutional Repository
Monk seal biomass and life history data (draft report),
https://www.nmfs.noaa.gov/pr/sars/pdf/pac2016_draft.pdf
information
originator
Source Contribution: Peer-reviewed manuscript, input data
Parrish FA, Howell EA, Antonelis GA, Iverson SJ, Littnan CL, Parrish JD, Polovina JJ (2012) Estimating the carrying capacity of French Frigate Shoals for the endangered Hawaiian monk seal using Ecopath with Ecosim. Marine Mammal Science 28:522-541
2011-07-15
publication
https://doi.org/10.1111/j.1748-7692.2011.00502.x
WWW:LINK-1.0-http--link
Wiley Online Library, Marine Mammal Science
information
Source Contribution: Peer-reviewed manuscript describing results
Weijerman M, Robinson S, Parrish F, Polovina J, Littnan C (2017) Comparative application of trophic ecosystem models to evaluate drivers of endangered Hawaiian monk seal populations. Mar Ecol Prog Ser 582:215-229.
2017-11-06
publication
https://doi.org/10.3354/meps12320
WWW:LINK-1.0-http--link
Marine Ecology Progress Series
Source Citation URL
information
otherRestrictions
otherRestrictions
Access Constraints: None | Use Constraints: None