Leopard seal (Hydrurga leptonyx) observations and occurrences in the Southern Ocean

OBIS and OBIS Canada

Between 1993 and 1996 observations of individual leopard seals (Hydrurga leptonyx) Bird Island, South Georgia were recorded. The purpose of this study was to monitor haul out patterns, seasonality and diet of leopard seals. This sampling program resulted in a collection of photos of individual leopard seals, many of which were tagged or known individuals (based on scars or pelage patterns). The collection includes different gender and life stages and individuals exhibiting different behaviour such as feeding (Antarctic fur seal or penguin kills) or swimming. Individual seals may have been photographed multiple times. A number of individuals were tagged using Dalton Jumbotags, Dalton Supplies Ltd., UK. Other seals could be identified by unique markings (scars or pelage patterns). This resource is based upon this photo collection and includes presence information only – no information is provided to calculate density. The next version of this resource will be enhanced and include the photos associated with these observations. In addition it will also be expanded to include photos collected between 1993 to present (2016).

N/A

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/2727dda4-ce0b-4b8a-9bbc-664b519e55c6
Data Provider's dataset page:
http://ipt.iobis.org/obiscanada/resource?r=leopard_seals

The dataset has been updated over time as outlined below. Each entry includes the version number, release date, type of change, and a short description.

Overview

Attributes are defined by OBIS.

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
oid	Internal ID
id	Record ID
dataset_id	Dataset ID
scientificname	Scientific name
vernacularname	Vernacular name
aphiaid	Aphia ID
taxonrank	taxononic rank
individualcount	Group size / individual count
eventdate	Event date (precision varies)
eventtime	Event time
decimallatitude	Latitude in decimal degrees
decimallongitude	Longitude in decimal degrees
coordinateprecision	Coordinate precision
catalognumber	Catalog number
collectioncode	Collection code
occurrencestatus	Occurrence status
basisofrecord	Basis of record (HumanObservation / MachineObservation)
modified	Date/time the record was modified
node_id	Node ID
occurrenceid	Occurrence ID
occurrenceremarks	Occurrence remarks
eventid	Event ID
institutioncode	Institution code
lifestage	Life stage
sex	Sex of the animal if known
species	Species by provider
datasetid	Dataset ID by provider
country	Country
locality	Location of ocean
waterbody	Details of ocean
dropped	Flag indicating the record was dropped (always false)
absence	Flag indicating the record represents the absence of the species (always false)
marine	Flag indicating the record is for marine life (always true)
obs_datetime
tprecision
on_land
date_in_future