http://lod.bco-dmo.org/id/dataset/712919
eng; USA
utf8
dataset
Highest level of data collection, from a common set of sensors or instrumentation, usually within the same research project
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
2017-08-16
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Sex ratio and GSI data for M. beryllina collected offshore of Pt. Lobos, California from 2009 to 2010.
2017-08-04
publication
2017-08-04
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2019-03-20
publication
https://doi.org/10.1575/1912/bco-dmo.712919.1
J. Wilson White
University of North Carolina - Wilmington
principalInvestigator
Susanne Brander
University of North Carolina - Wilmington
principalInvestigator
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
publisher
Cite this dataset as: White, J. W., Brander, S. (2017) Sex ratio and GSI data for M. beryllina collected offshore of Pt. Lobos, California from 2009 to 2010. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2017-08-04 [if applicable, indicate subset used]. doi:10.1575/1912/bco-dmo.712919.1 [access date]
Raw pattern data collected by S. Brander. Dataset Description: <p>This dataset contains the sex ratio and mean&nbsp;gonadosomatic&nbsp;index (GSI) of female M. beryllina&nbsp;collected offshore of Pt. Lobos California. Full description of details is provided in Brander et al. (2013).</p> Methods and Sampling: <p>Methodology from: Brander et al., 2013</p>
<p><strong>Fish Collecting and Processing</strong></p>
<p>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 5–10 ppt salinity for 4–5 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’s solution&nbsp;followed 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.</p>
<p><strong>Length, Sex Ratio,&nbsp;</strong><strong>GSI</strong></p>
<p>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.</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1435473 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1435473
completed
J. Wilson White
University of North Carolina - Wilmington
will.white@oregonstate.edu
pointOfContact
Susanne Brander
University of North Carolina - Wilmington
910-962-3786
Dept. Biology and Marine Biology, UNCW 601 S College Rd
Wilmington
NC
28403
USA
branders@oregonstate.edu
pointOfContact
asNeeded
Dataset Version: 1
Unknown
Investigator
Site
Date
MeanGSI
Total
Fs
Ms
Beach seine
theme
None, User defined
person name
site
date
mean
count
featureType
BCO-DMO Standard Parameters
Purse-seine Fishing Gear
instrument
BCO-DMO Standard Instruments
White_2012
service
Deployment Activity
Suisan Bay, California
place
Locations
otherRestrictions
otherRestrictions
Access Constraints: none. Use Constraints: Please follow guidelines at: http://www.bco-dmo.org/terms-use Distribution liability: Under no circumstances shall BCO-DMO be liable for any direct, incidental, special, consequential, indirect, or punitive damages that result from the use of, or the inability to use, the materials in this data submission. If you are dissatisfied with any materials in this data submission your sole and exclusive remedy is to discontinue use.
Impacts of size-selective mortality on sex-changing fishes
https://osprey.bco-dmo.org/project/516431
Impacts of size-selective mortality on sex-changing fishes
<p><em>Description from NSF award abstract:</em><br />
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.</p>
<p>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.</p>
Goby size-selection
largerWorkCitation
project
eng; USA
oceans
Suisan Bay, California
-122.06896
-122.06896
38.078633
38.078633
2017-08-04
Southern California, Santa Catalina Island
0
BCO-DMO catalogue of parameters from Sex ratio and GSI data for M. beryllina collected offshore of Pt. Lobos, California from 2009 to 2010.
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
http://lod.bco-dmo.org/id/dataset-parameter/712932.rdf
Name: Investigator
Units: unitless
Description: <p>Investigator that collected these data</p>
http://lod.bco-dmo.org/id/dataset-parameter/712933.rdf
Name: Site
Units: unitless
Description: <p>Site where data were collected</p>
http://lod.bco-dmo.org/id/dataset-parameter/712934.rdf
Name: Date
Units: unitless
Description: <p>Date of data collection; YYYY/MM/DD</p>
http://lod.bco-dmo.org/id/dataset-parameter/712935.rdf
Name: MeanGSI
Units: count
Description: <p>Mean gonadosomatic index of females</p>
http://lod.bco-dmo.org/id/dataset-parameter/712936.rdf
Name: Total
Units: count
Description: <p>Total number of adult M. beryllina collected</p>
http://lod.bco-dmo.org/id/dataset-parameter/712937.rdf
Name: Fs
Units: count
Description: <p>Number of females in sample</p>
http://lod.bco-dmo.org/id/dataset-parameter/712938.rdf
Name: Ms
Units: count
Description: <p>Number of males in sample</p>
GB/NERC/BODC > British Oceanographic Data Centre, Natural Environment Research Council, United Kingdom
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
1189
https://darchive.mblwhoilibrary.org/bitstream/1912/23882/1/dataset-712919_raw-patterns__v1.tsv
download
https://doi.org/10.1575/1912/bco-dmo.712919.1
download
onLine
dataset
<p>Methodology from: Brander et al., 2013</p>
<p><strong>Fish Collecting and Processing</strong></p>
<p>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 5–10 ppt salinity for 4–5 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’s solution&nbsp;followed 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.</p>
<p><strong>Length, Sex Ratio,&nbsp;</strong><strong>GSI</strong></p>
<p>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.</p>
Specified by the Principal Investigator(s)
<p>Scripts that were used to process these data can be found here: github.com/jwilsonwhite/IPM_statespace.</p>
<p><strong>BCO-DMO Data Processing Notes:</strong></p>
<p>-added column "investigator" to capture the metadata used to describe the table.<br />
-dates were reformatted from mm/dd/yy to yyyy/mm/dd<br />
-blank cells were replaced with nd<br />
-data were sorted by site, then date<br />
-reformatted column names to comply with BCO-DMO standards</p>
Specified by the Principal Investigator(s)
asNeeded
7.x-1.1
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
Beach seine
Beach seine
PI Supplied Instrument Name: Beach seine PI Supplied Instrument Description:Used to collect samples Instrument Name: Purse-seine Fishing Gear Instrument Short Name:Purse-seine Instrument Description: 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.
Deployment: White_2012
White_2012
shoreside Calif_shore
shoreside
White_2012
J. Wilson White
University of North Carolina - Wilmington
shoreside Calif_shore
shoreside