Maritimes Recreational Shark Fishery Derbies

Heather Bowlby, Fisheries and Oceans Canada

Dataset credit

OBIS and OBIS Canada

Contacts

RoleNameOrganization 
Primary contact Heather Bowlby Fisheries and Oceans Canada
Secondary contact Warren Joyce Fisheries and Oceans Canada

Citation

Bowlby, Heather and Warren Joyce. 2016. Maritimes Recreational Shark Fishery Derbies. Version 2 In OBIS Canada Digital Collections. Bedford Institute of Oceanography, Dartmouth, NS, Canada. Published by OBIS, Digital http://www.iobis.org/. Accessed on –INSERT DATE
Bowlby, H. 2020. Maritimes Recreational Shark Fishery Derbies. Data downloaded from OBIS-SEAMAP (http://seamap.env.duke.edu/dataset/103152586) on yyyy-mm-dd and originated from OBIS (https://obis.org/dataset/ed776303-7bc4-49f3-b005-9e1388aaab57)

Abstract

The Maritimes Recreational Shark Fishery has been active since 1993. Biological data collected from the recreational fishery is used to develop an assessment of stock status and the general health of the population, particularly that of blue sharks.

Shark fishing derbies are held each year in waters off Nova Scotia, usually during the months of July, August and September. These are commercial or community-sponsored events, and are not sponsored by DFO or the Shark Research Lab. However, the catches provide excellent samples for scientific examination, and thus all catches are closely monitored. The species most often caught is the blue shark. However the occasional thresher or porbeagle shark is also caught. Shortfin mako sharks are not uncommon in Canadian waters. Other species of shark do occur in Nova Scotian waters, however many of them prefer warmer waters that are associated with the Gulf Stream, or deeper waters which make them unlikely to be caught by recreational anglers.

Versions of the derby data may be restricted to blue sharks only, since that comprises 99% of the catch.

Users of records from this data set are advised to contact the PI for additional information prior to inclusion in publications.

Purpose

N/A

Supplemental information

This dataset was downloaded from OBIS (https://obis.org/). The records for only marine mammals, seabirds, sea turtles and rays and sharks were extracted. Records with no longitude/latitude or no date (eventDate) were excluded.
OBIS dataset page:
https://obis.org/dataset/ed776303-7bc4-49f3-b005-9e1388aaab57
Data Provider's dataset page:
http://ipt.iobis.org/obiscanada/resource?r=mar_shark_derbies

References

Bowlby, Heather and Warren Joyce. 2016. Maritimes Recreational Shark Fishery Derbies. Version 2 In OBIS Canada Digital Collections. Bedford Institute of Oceanography, Dartmouth, NS, Canada. Published by OBIS, Digital http://www.iobis.org/. Accessed on –INSERT DATE

Attributes

Overview

This section explains attributes included in the original dataset. OBIS-SEAMAP restricts the attributes available to the public to date/time, lat/lon and species names/counts only. Should you need other attributes described here, you are encouraged to contact the data provider.

Attributes described below represent those in the original dataset provided by the provider.
All attributes are included in the downloadable file (CSV or ESRI File Geodatabase) for "Complete Set of Dataset".

Attributes in dataset

Attribute (table column)Description
oidInternal ID
idRecord ID
dataset_idDataset ID
scientificnameScientific name
vernacularnameVernacular name
aphiaidAphia ID
taxonranktaxononic rank
individualcountGroup size / individual count
eventdateEvent date (precision varies)
eventtimeEvent time
decimallatitudeLatitude in decimal degrees
decimallongitudeLongitude in decimal degrees
coordinateprecisionCoordinate precision
catalognumberCatalog number
collectioncodeCollection code
occurrencestatusOccurrence status
basisofrecordBasis of record (HumanObservation / MachineObservation)
modifiedDate/time the record was modified
node_idNode ID
occurrenceidOccurrence ID
occurrenceremarksOccurrence remarks
eventidEvent ID
institutioncodeInstitution code
lifestageLife stage
sexGender of the animal if known
speciesSpecies by provider
datasetidDataset ID by provider
countryCountry
localityLocation of ocean
waterbodyDetails of ocean
droppedFlag indicating the record was dropped (always false)
absenceFlag indicating the record represents the absence of the species (always false)
marineFlag indicating the record is for marine life (always true)
OBIS-SEAMAP ID103152586
Seabirds0
Marine mammals0
Sea turtles0
Rays and sharks3,824
Other species0
Non spatial0
Non species-49
Total3,824
Date, Begin1993-08-21
Date, End2016-08-22
Temporal prec.111000
Latitude43.69 - 45.90
Longitude-66.13 - -59.97
Coord. prec.6 decimal digits
PlatformVarious
Data typeAnimal sighting
EffortN/A
Traveled (km)0
0
Contr. throughiOBIS
Registered2020-06-30
Updated2021-02-05
StatusPublished
Sharing policy CC-BY (All)
Also available in None
See metadata in static HTML
See metadata in FGDC XML
See download history / statistics