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Title Sum-
Institution Dataset ID
   set  data   graph     files  public Sex ratio and GSI data for M. beryllina collected offshore of Pt. Lobos, California from 2009
to 2010.
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The Dataset's Variables and Attributes

Row Type Variable Name Attribute Name Data Type Value
attribute NC_GLOBAL access_formats String .htmlTable,.csv,.json,.mat,.nc,.tsv
attribute NC_GLOBAL acquisition_description String Methodology from: Brander et al., 2013

Fish Collecting and Processing

Fish were collected monthly from the urban and ranch beaches from March
through October of 2009 and 2010, as previously described. All research was
done in accordance with the University of California, Davis Institutional
Animal Care and Use Committee (IACUC), under approved protocol #13353.
Captured fish were kept in a cooler with aeration and transported back to the
UC Davis Bodega Marine Lab, Bodega Bay, CA, for processing. During the 2009
sampling season approximately 20 fish from each site were kept alive and held
in aquaria at 5\u201310 ppt salinity for 4\u20135 months to serve as depurated
controls for gene expression analyses. The remaining fish were anesthetized in
accordance with IACUC protocol #13353, sacrificed, and livers were immediately
removed and snap-frozen on liquid nitrogen for RNA extraction. Gonads were
removed, weighed, and fixed for 24 hours in Davidson\u2019s
solution\u00a0followed by storage in phosphate buffered 10% formalin. Fish
length and sex were recorded prior to and following dissection, respectively.
Fish mass was measured after gonad removal and used in addition to gonad mass
to obtain a total mass for gonadosomatic index (GSI) calculation (GSI = gonad
mass/total mass). Sagittal otoliths were extracted, mounted on slides,
photographed, and growth increments were counted and measured based on
previously described methods.

Length, Sex Ratio,\u00a0GSI

Because fish length, sex ratio, and GSI were expected to vary over the
sampling period, we tested for differences among sites in those variables
while including year and Julian date as covariates in a linear model (length)
or logistic regression (sex ratio and GSI). Because no females were seined
from the urban beach after July in either 2009 or 2010, GSI analysis was ended
at that time point.
attribute NC_GLOBAL awards_0_award_nid String 542383
attribute NC_GLOBAL awards_0_award_number String OCE-1435473
attribute NC_GLOBAL awards_0_data_url String http://www.nsf.gov/awardsearch/showAward?AWD_ID=1435473 (external link)
attribute NC_GLOBAL awards_0_funder_name String NSF Division of Ocean Sciences
attribute NC_GLOBAL awards_0_funding_acronym String NSF OCE
attribute NC_GLOBAL awards_0_funding_source_nid String 355
attribute NC_GLOBAL awards_0_program_manager String David L. Garrison
attribute NC_GLOBAL awards_0_program_manager_nid String 50534
attribute NC_GLOBAL cdm_data_type String Other
attribute NC_GLOBAL comment String Raw pattern summary data
Collected by Susanne Brander
J. W. White and S. Brander, PIs
Version 4 August 2017
attribute NC_GLOBAL Conventions String COARDS, CF-1.6, ACDD-1.3
attribute NC_GLOBAL creator_email String info at bco-dmo.org
attribute NC_GLOBAL creator_name String BCO-DMO
attribute NC_GLOBAL creator_type String institution
attribute NC_GLOBAL creator_url String https://www.bco-dmo.org/ (external link)
attribute NC_GLOBAL data_source String extract_data_as_tsv version 2.3 19 Dec 2019
attribute NC_GLOBAL date_created String 2017-08-16T21:11:08Z
attribute NC_GLOBAL date_modified String 2019-03-20T14:59:40Z
attribute NC_GLOBAL defaultDataQuery String &time<now
attribute NC_GLOBAL doi String 10.1575/1912/bco-dmo.712919.1
attribute NC_GLOBAL infoUrl String https://www.bco-dmo.org/dataset/712919 (external link)
attribute NC_GLOBAL institution String BCO-DMO
attribute NC_GLOBAL instruments_0_acronym String Purse-seine
attribute NC_GLOBAL instruments_0_dataset_instrument_description String Used to collect samples
attribute NC_GLOBAL instruments_0_dataset_instrument_nid String 713186
attribute NC_GLOBAL instruments_0_description String A purse seine is a large wall of netting deployed in a circle around an entire school of fish. The seine has floats along the top line with a lead line of chain along the bottom. Once a school of fish is located, a skiff pulls the seine into the water as the vessel encircles the school with the net. A cable running along the bottom is then pulled in, "pursing" the net closed on the bottom, preventing fish from escaping by swimming downward. The catch is harvested by bringing the net alongside the vessel and brailing the fish aboard.
attribute NC_GLOBAL instruments_0_instrument_name String Purse-seine Fishing Gear
attribute NC_GLOBAL instruments_0_instrument_nid String 675173
attribute NC_GLOBAL instruments_0_supplied_name String Beach seine
attribute NC_GLOBAL keywords String bco, bco-dmo, biological, chemical, data, dataset, date, dmo, erddap, gsi, investigator, management, mean, MeanGSI, oceanography, office, preliminary, site, time, total
attribute NC_GLOBAL license String https://www.bco-dmo.org/dataset/712919/license (external link)
attribute NC_GLOBAL metadata_source String https://www.bco-dmo.org/api/dataset/712919 (external link)
attribute NC_GLOBAL param_mapping String {'712919': {}}
attribute NC_GLOBAL parameter_source String https://www.bco-dmo.org/mapserver/dataset/712919/parameters (external link)
attribute NC_GLOBAL people_0_affiliation String University of North Carolina - Wilmington
attribute NC_GLOBAL people_0_affiliation_acronym String UNC-Wilmington
attribute NC_GLOBAL people_0_person_name String J Wilson White
attribute NC_GLOBAL people_0_person_nid String 516429
attribute NC_GLOBAL people_0_role String Principal Investigator
attribute NC_GLOBAL people_0_role_type String originator
attribute NC_GLOBAL people_1_affiliation String University of North Carolina - Wilmington
attribute NC_GLOBAL people_1_affiliation_acronym String UNC-Wilmington
attribute NC_GLOBAL people_1_person_name String Dr Susanne Brander
attribute NC_GLOBAL people_1_person_nid String 712930
attribute NC_GLOBAL people_1_role String Co-Principal Investigator
attribute NC_GLOBAL people_1_role_type String originator
attribute NC_GLOBAL people_2_affiliation String University of North Carolina - Wilmington
attribute NC_GLOBAL people_2_affiliation_acronym String UNC-Wilmington
attribute NC_GLOBAL people_2_person_name String J Wilson White
attribute NC_GLOBAL people_2_person_nid String 516429
attribute NC_GLOBAL people_2_role String Contact
attribute NC_GLOBAL people_2_role_type String related
attribute NC_GLOBAL people_3_affiliation String Woods Hole Oceanographic Institution
attribute NC_GLOBAL people_3_affiliation_acronym String WHOI BCO-DMO
attribute NC_GLOBAL people_3_person_name String Hannah Ake
attribute NC_GLOBAL people_3_person_nid String 650173
attribute NC_GLOBAL people_3_role String BCO-DMO Data Manager
attribute NC_GLOBAL people_3_role_type String related
attribute NC_GLOBAL project String Goby size-selection
attribute NC_GLOBAL projects_0_acronym String Goby size-selection
attribute NC_GLOBAL projects_0_description String Description from NSF award abstract:
Many marine fish species change sex during their lifetimes, and many of them are targets of commercial and recreational fishing. The timing of sex change in these animals is often related to body size, so populations typically consist of many small fish of the initial sex (usually female) and few large fish of the other sex (usually male). In nature, smaller fish are at a greater risk of mortality due to predation, but fishermen tend to seek larger fish. Thus fishing that targets larger individuals may skew sex ratios, removing enough of the larger sex to hinder reproduction. However, the extent to which size-selective mortality affects sex-changing fishes is poorly understood. This research will explore the effects of size-selective mortality on the population dynamics of sex-changing species using an integrated set of field experiments and mathematical models. It will provide the first experimental exploration of the sensitivity of different sex-change patterns and reproductive strategies to selective mortality. The results will advance our knowledge of the susceptibility and resilience of sex-changing organisms to different types of size-selective mortality and will reveal how sex-changing species can recover after size-selection ceases, as in populations within marine reserves where fishing is suddenly prohibited. The findings will inform fisheries management policies, which do not currently consider the ability of a species to change sex in setting fisheries regulations.
This project will consist of a three-year study of the effects of size-specific mortality on sex-changing fishes. Field experiments will use three closely related rocky-reef fishes that differ in sex-change pattern and are amenable to field manipulation and direct measurement of reproductive output. The species include a protogynous hermaphrodite (a female-to-male sex-change pattern common among harvested species) and two simultaneous hermaphrodites that differ in their ability to switch between male and female. Two types of experiments will be conducted on populations established on replicate patch reefs at Santa Catalina Island, California: (1) sex ratios will be manipulated to determine when the scarcity of males limits population-level reproductive output; and (2) experiments cross-factoring the intensity of mortality with the form of size-selection (i.e., higher mortality of large or small individuals) will test the demographic consequences of size-selective mortality. In concert with the field experiments, size- and sex-structured population models (integral projection models) will be developed for use in three ways: (1) to evaluate how different types of selective mortality should affect population dynamics; (2) to predict outcomes of the field experiments, testing/validating the model and allowing direct prediction of the ecological significance of short-term selection; and (3) to fit to existing survey data for a fourth species, a widely fished, sex-changing fish, inside and outside of marine reserves. Part (3) will evaluate whether and how quickly the mating system and reproductive output of that species (not directly measurable in the field) is recovering inside reserves. This integrated set of field experiments and models will yield novel insight into the effects of size-selective mortality on the population dynamics of sex-changing marine species.
attribute NC_GLOBAL projects_0_end_date String 2018-02
attribute NC_GLOBAL projects_0_geolocation String Southern California, Santa Catalina Island
attribute NC_GLOBAL projects_0_name String Impacts of size-selective mortality on sex-changing fishes
attribute NC_GLOBAL projects_0_project_nid String 516431
attribute NC_GLOBAL projects_0_start_date String 2015-03
attribute NC_GLOBAL publisher_name String Biological and Chemical Oceanographic Data Management Office (BCO-DMO)
attribute NC_GLOBAL publisher_type String institution
attribute NC_GLOBAL sourceUrl String (local files)
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table v55
attribute NC_GLOBAL subsetVariables String Investigator
attribute NC_GLOBAL summary String Sex ratio and GSI data for M. beryllina collected offshore of Pt. Lobos, California from 2009 to 2010.
attribute NC_GLOBAL title String Sex ratio and GSI data for M. beryllina collected offshore of Pt. Lobos, California from 2009 to 2010.
attribute NC_GLOBAL version String 1
attribute NC_GLOBAL xml_source String osprey2erddap.update_xml() v1.3
variable Investigator   String  
attribute Investigator bcodmo_name String person
attribute Investigator description String Investigator that collected these data
attribute Investigator long_name String Investigator
attribute Investigator units String unitless
variable Site   String  
attribute Site bcodmo_name String site
attribute Site description String Site where data were collected
attribute Site long_name String Site
attribute Site units String unitless
variable Date   String  
attribute Date bcodmo_name String date
attribute Date description String Date of data collection; YYYY/MM/DD
attribute Date long_name String Date
attribute Date nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/ADATAA01/ (external link)
attribute Date source_name String Date
attribute Date time_precision String 1970-01-01
attribute Date units String unitless
variable MeanGSI   float  
attribute MeanGSI _FillValue float NaN
attribute MeanGSI actual_range float 0.6, 14.4
attribute MeanGSI bcodmo_name String mean
attribute MeanGSI description String Mean gonadosomatic index of females
attribute MeanGSI long_name String Mean GSI
attribute MeanGSI units String count
variable Fs   byte  
attribute Fs _FillValue byte 127
attribute Fs actual_range byte 0, 10
attribute Fs bcodmo_name String count
attribute Fs description String Number of females in sample
attribute Fs long_name String FS
attribute Fs units String count
variable Ms   byte  
attribute Ms _FillValue byte 127
attribute Ms actual_range byte 0, 25
attribute Ms bcodmo_name String count
attribute Ms description String Number of males in sample
attribute Ms long_name String MS
attribute Ms units String count
variable Total   byte  
attribute Total _FillValue byte 127
attribute Total actual_range byte 1, 26
attribute Total bcodmo_name String count
attribute Total description String Total number of adult M. beryllina collected
attribute Total long_name String Total
attribute Total units String count

The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV1, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.

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