Sightings of southern right whales around mainland New Zealand 1976-2002

Nathalie Patenaude, Nature Calls Ltd

Dataset credit

OBIS and SWP OBIS

Contacts

RoleNameOrganization 
Primary contact Nathalie Patenaude School of Biological Sciences, University of Auckland N/A

Citation

Patenaude N (2020): Sightings of southern right whales around mainland New Zealand 1976-2002. v1.0. Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node. Dataset/Occurrence. https://nzobisipt.niwa.co.nz/resource?r=southernrightwhales_nz&v=1.0
Patenaude, N. 2020. Sightings of southern right whales around mainland New Zealand 1976-2002. Data downloaded from OBIS-SEAMAP (http://seamap.env.duke.edu/dataset/103152603) on yyyy-mm-dd and originated from OBIS (https://obis.org/dataset/fdde5055-44f4-4066-83b6-4c2b00080eaa)

Abstract

The status of southern right whales around ‘mainland’ New Zealand was assessed by reviewing 110 sightings and 23 individual photo-identifications collected between 1976 and 2002. Sightings were reported in 11 of the 12 Conservancies (Department of Conservation administrative areas) with coastal waters. Southland Conservancy was the primary area visited by non-cow/calf whales and Hawke's Bay Conservancy represented the primary area for cow/calf pairs. Whales were sighted in all seasons with the majority of sightings reported in winter (60%) and spring (22%). Between 1988 and 2001 (when whales were consistently sighted), southern right whales showed a significant increase in number of sightings and number of whales per sighting. The estimated rate of increase is imprecise and likely affected by uneven sighting effort over the years. Despite this apparent increase in overall sightings, there was little evidence of increase in the number of cow/calf pairs sighted around New Zealand’s three main islands (‘the mainland’). No matches were made between 26 photo-identified whales from around the mainland and the extensive catalogue of whales photo-identified in the subantarctic islands. The former population remains severely depleted, and likely contains between 4 and 11reproductive females. The lack of evidence of movement between the mainland and the subantarctic islands and the marked difference in recovery between the two areas suggests that the two populations represent separate stock.

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/fdde5055-44f4-4066-83b6-4c2b00080eaa
Data Provider's dataset page:
https://nzobisipt.niwa.co.nz/resource?r=southernrightwhales_nz

References

Patenaude N (2020): Sightings of southern right whales around mainland New Zealand 1976-2002. v1.0. Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node. Dataset/Occurrence. https://nzobisipt.niwa.co.nz/resource?r=southernrightwhales_nz&v=1.0

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 ID103152603
Seabirds0
Marine mammals174
Sea turtles0
Rays and sharks0
Other species0
Non spatial0
Non species0
Total174
Date, Begin1976-08-15
Date, End2002-09-27
Temporal prec.100000
Latitude-47.20 - -34.95
Longitude166.83 - 178.45
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