Breeding colonies of the New Zealand fur seal Arctocephalus forsteri

Occurrence Observation
Dernière version Publié par Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node le août 3, 2024 Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node
Date de publication:
3 août 2024
Licence:
CC-BY 4.0

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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.

Enregistrements de données

Les données de cette ressource occurrence ont été publiées sous forme dune Archive Darwin Core (Darwin Core Archive ou DwC-A), le format standard pour partager des données de biodiversité en tant quensemble dun ou plusieurs tableurs de données. Le tableur de données du cœur de standard (core) contient 19 enregistrements.

Cet IPT archive les données et sert donc de dépôt de données. Les données et métadonnées de la ressource sont disponibles pour téléchargement dans la section téléchargements. Le tableau des versions liste les autres versions de chaque ressource rendues disponibles de façon publique et permet de tracer les modifications apportées à la ressource au fil du temps.

Versions

Le tableau ci-dessous naffiche que les versions publiées de la ressource accessibles publiquement.

Comment citer

Les chercheurs doivent citer cette ressource comme suit:

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

Droits

Les chercheurs doivent respecter la déclaration de droits suivante:

L’éditeur et détenteur des droits de cette ressource est Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node. Ce travail est sous licence Creative Commons Attribution (CC-BY) 4.0.

Enregistrement GBIF

Cette ressource na pas été enregistrée sur le portail GBIF

Mots-clé

Occurrence; Observation

Contacts

Nicholas Dussex
  • Fournisseur Des Métadonnées ●
  • Créateur ●
  • Personne De Contact
  • Researcher
Department of Zoology, University of Otago
Dunedin
NZ
Bruce C. Robertson
  • Créateur
School of Biological Sciences, University of Canterbury
Christchurch
NZ
Alexander T. Salis
  • Créateur
  • Researcher
Department of Zoology, University of Otago
Dunedin
NZ
Aleksandr Kalinin
  • Créateur
  • Researcher
School of Biological Sciences, University of Canterbury
Christchurch
NZ
Hugh Best
  • Créateur
  • Researcher
Marine Conservation Unit, Department of Conservation
Wellington
NZ
Neil J. Gemmell
  • Créateur
  • Researcher
School of Biological Sciences, University of Canterbury
Christchurch
NZ
Kevin Mackay
  • Utilisateur

Couverture géographique

New Zealand and Australia

Enveloppe géographique Sud Ouest [-48,025, 122,048], Nord Est [-33,761, 179,024]

Méthodes déchantillonnage

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

Etendue de létude Breeding colonies of New Zealand fur seal in New Zealand and Australia.

Description des étapes de la méthode:

  1. 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.
  2. 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.

Citations bibliographiques

  1. 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
  2. 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

Métadonnées additionnelles

marine, harvested by iOBIS

Identifiants alternatifs https://nzobisipt.niwa.co.nz/resource?r=nzfs_breeding_colonys