Description
This dataset is from a paper by Dussex et al. looking at the low spatial genetic differentiation associated rapid recolonization of the New Zealand fur seal Arctocephalus forsteri.
Population declines resulting from anthropogenic activities are of major consequence for the long-term survival of species because the resulting loss of genetic diversity can lead to extinction via the effects of inbreeding depression, fixation of deleterious mutations, and loss of adaptive potential. Otariid pinnipeds have been exploited commercially to near extinction with some species showing higher demographic resilience and recolonization potential than others. The New Zealand fur seal (NZFS) was heavily impacted by commercial sealing between the late 18th and early 19th centuries, but has recolonized its former range in southern Australia. The species has also recolonized its former range in New Zealand, yet little is known about the pattern of recolonization. Here, we first used 11 microsatellite markers (n = 383) to investigate the contemporary population structure and dispersal patterns in the NZFS (Arctocephalus forsteri). Secondly, we model postsealing recolonization with 1 additional mtDNA cytochrome b (n = 261) marker. Our data identified 3 genetic clusters: an Australian, a subantarctic, and a New Zealand one, with a weak and probably transient subdivision within the latter cluster. Demographic history scenarios supported a recolonization of the New Zealand coastline from remote west coast colonies, which is consistent with contemporary gene flow and with the species’ high resilience. The present data suggest the management of distinct genetic units in the North and South of New Zealand along a genetic gradient. Assignment of individuals to their colony of origin was limited (32%) with the present data indicating the current microsatellite markers are unlikely sufficient to assign fisheries bycatch of NZFSs to colonies.
Data Records
The data in this occurrence resource has been published as a Darwin Core Archive (DwC-A), which is a standardized format for sharing biodiversity data as a set of one or more data tables. The core data table contains 19 records.
This IPT archives the data and thus serves as the data repository. The data and resource metadata are available for download in the downloads section. The versions table lists other versions of the resource that have been made publicly available and allows tracking changes made to the resource over time.
Versions
The table below shows only published versions of the resource that are publicly accessible.
How to cite
Researchers should cite this work as follows:
Dussex N, Robertson B C, Salis A T, Kalinin A, Best H, Gemmell N J (2024). Breeding colonies of the New Zealand fur seal Arctocephalus forsteri. Version 1.0. Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node. Occurrence dataset. https://nzobisipt.niwa.co.nz/resource?r=nzfs_breeding_colonys&v=1.0
Rights
Researchers should respect the following rights statement:
The publisher and rights holder of this work is Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node. This work is licensed under a Creative Commons Attribution (CC-BY 4.0) License.
GBIF Registration
This resource has not been registered with GBIF
Keywords
Occurrence; Observation
Contacts
- Metadata Provider ●
- Originator ●
- Point Of Contact
- Originator
- Originator
- Originator
- Originator
- Originator
- User
Geographic Coverage
New Zealand and Australia
| Bounding Coordinates | South West [-48.025, 122.048], North East [-33.761, 179.024] |
|---|
Sampling Methods
Dussex et al. (2016) investigated the contemporary population structure and dispersal patterns of the New Zealand fur seal by obtaining genetic samples from individuals in breeding colonies. Supplementary material provided by Dussex et al. (2016) include Mitochondrial Cytochrome b sequences for 261 NZ fur seal pups, Microsatellite genotypes for 383 NZ fur seal pups, and Microsatellite and Cytochrome b input data file for DIYABC
| Study Extent | Breeding colonies of New Zealand fur seal in New Zealand and Australia. |
|---|
Method step description:
- Otariids are capable of significant dispersal, which means that analyzing genetic data from adults would likely underestimate the true population structure of the species. Moreover, high dispersal presents the possibility of intra- and inter-seasonal variation in the genetic composition of adults at colonies and haulouts (e.g., Robertson et al. 2006). In order to avoid a bias caused by high adult dispersal and yearly variation in dispersal, we sampled pups, as they are a direct genetic representation of each breeding colony (i.e., influenced by female philopatry) in any given year.
- Genetic samples were obtained from 397 NZFS pups at 19 breeding colonies covering the entire range of the species. For each pup, a small piece of skin was taken from the tip of a digit on a hind flipper using piglet ear notch pliers (Majluf and Goebel 1992) and stored in 70% ethanol.
Bibliographic Citations
- Dussex, Nicolas et al. (2018). Data from: Low spatial genetic differentiation associated with rapid recolonization in the New Zealand fur seal Arctocephalus forsteri [Dataset]. Dryad. https://doi.org/10.5061/dryad.4v551
- Nicolas Dussex, Bruce C. Robertson, Alexander T. Salis, Aleksandr Kalinin, Hugh Best, Neil J. Gemmell, Low Spatial Genetic Differentiation Associated with Rapid Recolonization in the New Zealand Fur Seal Arctocephalus forsteri, Journal of Heredity, Volume 107, Issue 7, 2016, Pages 581–592 https://doi.org/10.1093/jhered/esw056
Additional Metadata
marine, harvested by iOBIS
| Alternative Identifiers | https://nzobisipt.niwa.co.nz/resource?r=nzfs_breeding_colonys |
|---|