Movements of southern right whales (<i>Eubalaena australis</i>) between Australian and subantarctic New Zealand populations

Pirzl, Rebecca; Patenaude, Nathalie J.; Burnell, Stephen; Bannister, John

doi:10.1111/j.1748-7692.2008.00276.x

Cited by 19 publications

(33 citation statements)

References 6 publications

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“…Although the confidence in the genetic distinctiveness of the SEA calving ground is limited by the small sample size, this is inevitable in a remnant population. However, our proposal for 2 stocks is also supported by stark differences in recovery between SWA and SEA (Kemper et al 1997, Bannister 2008, Burnell 2008 and is consistent with the majority of photo-identification studies, which have not documented movements between VIC or NSW and WA (Kemper et al 1997, Burnell 2001, Pirzl et al 2009). …”

Section: Two Australian Stockssupporting

confidence: 86%

“…Of the few sightings in New South Wales, one has been matched with photo-identification to this Victorian calving ground (Kemper et al 1997). This differential recovery parallels the New Zealand situation, with abundance in southwest Australia conceivably being an order of magnitude greater than that in southeast Australia, and supports the hypothesis that these 2 areas contain distinct stocks (Kemper et al 1997, Bannister 2009). Alternatively, there may be one stock across the southern coast of Australia with patchy distribution, consistent with the lack of population structure suggested by historical data (IWC 1986).…”

Section: Introductionsupporting

confidence: 71%

“…However, there are some examples of movement of individuals between putative stocks (e.g. NZSA to SA; Pirzl et al 2009), which implies there is ongoing gene flow rather than recent divergence. Testing for paternity may help differentiate between the proximate and evolutionary hypotheses for the weak differentiation in nuclear markers.…”

Section: Maternal Philopatry and Sex-biased Gene Flowmentioning

confidence: 99%

“…In Australia, the Western Australian and Head of the Bight (South Australia) calving grounds also show signs of recovery (Burnell 2001, Bannister 2009). There is a high degree of interchange between these grounds, as documented by photo-identification studies, and they are considered a single 'southwest Australian' population numbering approximately 3000 whales (Burnell 2001, Bannister 2009).…”

Section: Introductionmentioning

confidence: 99%

“…There is a high degree of interchange between these grounds, as documented by photo-identification studies, and they are considered a single 'southwest Australian' population numbering approximately 3000 whales (Burnell 2001, Bannister 2009). In contrast, sightings in the southeast of Australia remain infrequent and the demography of this small population is not well understood (Kemper et al 1997, Bannister 2009). The population was estimated to number 76 whales in 1993 and Warrnambool, Victoria, appears to be the only consistent calving area in southeast Australia (Kemper et al 1997).…”

Section: Introductionmentioning

confidence: 99%

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Population structure and individual movement of southern right whales around New Zealand and Australia

Carroll¹,

Patenaude²,

Alexander³

et al. 2011

Mar. Ecol. Prog. Ser.

115

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During the last 2 centuries, southern right whales Eubalaena australis were hunted to near extinction, and an estimated 150 000 were killed by pre-industrial whaling in the 19th century and illegal Soviet whaling in the 20th century. Here we focus on the coastal calving grounds of Australia and New Zealand (NZ), where previous work suggests 2 genetically distinct stocks of southern right whales are recovering. Historical migration patterns and spatially variable patterns of recovery suggest each of these stocks are subdivided into 2 stocks: (1) NZ, comprising NZ subantarctic (NZSA) and mainland NZ (MNZ) stocks; and (2) Australia, comprising southwest and southeast stocks. We expand upon previous work to investigate population subdivision by analysing over 1000 samples collected at 6 locations across NZ and Australia, although sample sizes were small from some locations. Mitochondrial DNA (mtDNA) control region haplotypes (500 bp) and microsatellite genotypes (13 loci) were used to identify 707 individual whales and to test for genetic differentiation. For the first time, we documented the movement of 7 individual whales between the NZSA and MNZ based on the matching of multilocus genotypes. Given the current and historical evidence, we hypothesise that individuals from the NZ subantarctic are slowly recolonising MNZ, where a former calving ground was extirpated. We also suggest that southeast Australian right whales represent a remnant stock, distinct from the southwest Australian stock, based on significant differentiation in mtDNA haplotype frequencies (F ST = 0.15, p < 0.01; Φ ST = 0.12, p = 0.02) and contrasting patterns of recovery. In comparison with significant differences in mtDNA haplotype frequencies found between the 3 proposed stocks (overall F ST = 0.07, Φ ST = 0.12, p < 0.001), we found no significant differentiation in microsatellite loci (overall

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Section: Two Australian Stockssupporting

confidence: 86%

Section: Introductionsupporting

confidence: 71%

Section: Maternal Philopatry and Sex-biased Gene Flowmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Population structure and individual movement of southern right whales around New Zealand and Australia

Carroll¹,

Patenaude²,

Alexander³

et al. 2011

Mar. Ecol. Prog. Ser.

115

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Southern right whale (Eubalaena australis) population demographics at major calving ground Head of Bight, South Australia, 1991–2016

Charlton

McCauley

Brownell³

et al. 2022

Aquatic Conservation

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1. Demographic parameters were estimated for southern right whales (SRWs), Eubalaena australis, using photo-identification (photo-ID) and count data collected during annual cliff-based surveys at the Head of the Great Australian Bight (HoB), South Australia between 1991 and 2016. Photo-ID and count data were contributed from the annual aerial surveys of the south-western population in Australia (1993Australia ( -2016. 2. The HoB photo-ID database included 1,186 non-calf individuals, with 459 reproductive females. HoB is an open population and represents a relative proportion (0.48-0.21) of the overall south-western population, which is decreasing with population growth.3. No change was detected in the growth rate at HoB over time and there was no significant difference when compared to the overall south-western population. The estimated mean rate of increase for all SRW was 3.2% (± 1.3) per annum and for females with a calf was 4.6% (± 1.7) per annum at HoB, compared to 5.5% (95% confidence interval (CI) 3.78, 7.36) and 6.01% (95% CI, 3.78, 7.36), respectively for the south-western population during the same period.4. The apparent mean calving interval was 3.3 years (SD = 0.78, ± 0.14, 95% CI; 1996-2016), and a significant increase to 4 years was observed since 2015. The apparent mean age at first parturition was 9.0 years. The minimum estimated age of the oldest whale was 50 and oldest lactating female 41 years old.5. The SRW demographic data provides information for monitoring recovery, population status, species conservation management and global comparative studies. There is a need to understand fluctuations in calving intervals, threats to the population and implications for species recovery.

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Demography and ecology of southern right whales Eubalaena australis wintering at sub-Antarctic Campbell Island, New Zealand

Torres

Rayment

Olavarría³

et al. 2016

Polar Biol

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Movements of southern right whales (Eubalaena australis) between Australian and subantarctic New Zealand populations

Cited by 19 publications

References 6 publications

Population structure and individual movement of southern right whales around New Zealand and Australia

Population structure and individual movement of southern right whales around New Zealand and Australia

Southern right whale (Eubalaena australis) population demographics at major calving ground Head of Bight, South Australia, 1991–2016

Demography and ecology of southern right whales Eubalaena australis wintering at sub-Antarctic Campbell Island, New Zealand

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