Breeding colonies of the New Zealand fur seal Arctocephalus forsteri

Occurrence Observation
最新版本 published by Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node on 8月 3, 2024 Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node
發布日期:
2024年8月3日
授權條款:
CC-BY 4.0

下載最新版本的 Darwin Core Archive (DwC-A) 資源，或資源詮釋資料的 EML 或 RTF 文字檔。

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說明

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.

資料紀錄

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版本

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如何引用

研究者應依照以下指示引用此資源。:

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

權利

研究者應尊重以下權利聲明。:

此資料的發布者及權利單位為 Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node。 This work is licensed under a Creative Commons Attribution (CC-BY 4.0) License.

GBIF 註冊

此資源尚未向GBIF註冊

關鍵字

Occurrence; Observation

聯絡資訊

Nicholas Dussex
  • 元數據提供者 ●
  • 出處 ●
  • 連絡人
  • Researcher
Department of Zoology, University of Otago
Dunedin
NZ
Bruce C. Robertson
  • 出處
School of Biological Sciences, University of Canterbury
Christchurch
NZ
Alexander T. Salis
  • 出處
  • Researcher
Department of Zoology, University of Otago
Dunedin
NZ
Aleksandr Kalinin
  • 出處
  • Researcher
School of Biological Sciences, University of Canterbury
Christchurch
NZ
Hugh Best
  • 出處
  • Researcher
Marine Conservation Unit, Department of Conservation
Wellington
NZ
Neil J. Gemmell
  • 出處
  • Researcher
School of Biological Sciences, University of Canterbury
Christchurch
NZ
Kevin Mackay
  • 使用者

地理涵蓋範圍

New Zealand and Australia

界定座標範圍 緯度南界 經度西界 [-48.025, 122.048], 緯度北界 經度東界 [-33.761, 179.024]

取樣方法

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

研究範圍 Breeding colonies of New Zealand fur seal in New Zealand and Australia.

方法步驟描述:

  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.

引用文獻

  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

額外的詮釋資料

marine, harvested by iOBIS

替代的識別碼 https://nzobisipt.niwa.co.nz/resource?r=nzfs_breeding_colonys