Jasus and Sagmariasus Species

Jeffs, Andrew; Gardner, Caleb; Cockcroft, Andy

doi:10.1002/9781118517444.ch9

Cited by 29 publications

(24 citation statements)

References 147 publications

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“…This resource represents a substantial income for economies of both countries, providing annual revenue of approximately US$292 million to Australia (ABARE-BRS 2010) and US$204 million to New Zealand (Statistics New Zealand 2016). The main export market for both countries is Asia, where lobsters are mostly exported live (ABARE-BRS 2010;Jeffs et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Outlier SNPs enable food traceability of the southern rock lobster, Jasus edwardsii

et al. 2016

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Recent advances in next generation sequencing have enhanced the resolution of population genetic studies of non-model organisms through increased marker generation and sample throughput. Using double digest restriction siteassociated DNA sequencing (ddRADseq), we investigated the population structure of the commercially important southern rock lobster, Jasus edwardsii, in Australia and New Zealand with the aim of identifying a panel of SNP markers that could be used to trace country of origin. Four ddRADseq libraries comprising a total of 91 individuals were sequenced on the Illumina MiSeq platform and demultiplexed reads were used to create a reference catalog of loci. Individual reads were then mapped to the reference catalog and variant calling was performed. We have characterized two single nucleotide polymorphism (SNP) panels comprised in total of 656 SNPs. The first panel contained 535 neutral SNPs, and the second, 121 outlier SNPs that were characteristic of being putatively under selection. Both neutral and outlier SNP panels showed significant differentiation between the two countries, with the outlier loci demonstrating much larger FST values (FST outlier SNP panel = 0.134, P < 0.0001; FST neutral SNP panel = 0.022, P < 0.0001). Assignment tests performed with the outlier SNP panel allocated 100% of the individuals to country of origin, demonstrating the usefulness of these markers for food traceability of J. edwardsii.

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Section: Introductionmentioning

confidence: 99%

Outlier SNPs enable food traceability of the southern rock lobster, Jasus edwardsii

et al. 2016

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“…Jasus edwardsii, known as southern rock lobster in Australia, is broadly distributed across the southern mainland of Australia, around Tasmania and New Zealand, including the Chatham Islands in the far east of New Zealand (Booth, 2006). This species supports valuable commercial and recreational fisheries across its distribution with around 6 500 t harvested per year at a commercial value of US$ 450 million (Jeffs et al, 2013). An individual female can annually produce between 44 000 to 660 000 eggs during the austral winter (May to August; Green et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Differing environmental drivers of settlement across the range of southern rock lobster (Jasus edwardsii) suggest resilience of the fishery to climate change

Hinojosa

Gardner

Green

et al. 2016

Fisheries Oceanography

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Temporal and spatial trends in settlement of the southern rock lobster, Jasus edwardsii, were examined to identify the influence of environmental variables over different spatial scales. Settlement data were collected from 1994 to 2011 along the Southern Australian and New Zealand coasts. We identified common settlement trends at a regional scale (100–500 km): the magnitude of settlement at sites from South Australia (SA) and Victoria (VIC) were similar, but different to sites in Tasmania (TAS). In New Zealand, three spatial regions were identified: northern (NNZ), middle (MNZ) and southern regions (SNZ). Higher settlement in SA, VIC and MNZ occurred in years with higher rainfall and storms in spring and El Niño conditions. In TAS and SNZ, higher settlement occurred during La Niña conditions. These results suggest that settlement over regional scales is modulated by oceanic processes, but outcomes vary between regions. At a local scale, a higher wave period and wind relaxation were relatively more important than the sea surface temperature (SST) in SA and VIC. In TAS, the current velocity also influenced the strength of settlement. However, much of the local settlement variability was not explained by the models suggesting that settlement in J. edwardsii is a complex process where larval behaviour, biological factors and oceanographic processes interact over different scales. The apparently complex processes affecting settlement showed that environmental conditions that reduced settlement strength in one region of the fishery often increased settlement strength in other regions. This could provide resilience to climate change at the stock level.

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“…Spiny lobsters are critical for sustaining rural coastal livelihoods and are an important part of the food production chain. S. verreauxi is one of a few closely related species which constitute the spiny lobster fishery industry in the Southern Hemisphere 12 . Recent advances in hatchery technologies have enabled closing the life cycle of this species in captivity, overcoming several hurdles including stocking densities 13 14 , temperature and photoperiod requirements 15 16 and perhaps most challenging, the phyllosoma-puerulus transition 3 .…”

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confidence: 99%

Redefining metamorphosis in spiny lobsters: molecular analysis of the phyllosoma to puerulus transition in Sagmariasus verreauxi

Ventura

Fitzgibbon

Battaglene

et al. 2015

Sci Rep

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The molecular understanding of crustacean metamorphosis is hindered by small sized individuals and inability to accurately define molt stages. We used the spiny lobster Sagmariasus verreauxi where the large, transparent larvae enable accurate tracing of the transition from a leaf-shaped phyllosoma to an intermediate larval-juvenile phase (puerulus). Transcriptomic analysis of larvae at well-defined stages prior to, during, and following this transition show that the phyllosoma-puerulus metamorphic transition is accompanied by vast transcriptomic changes exceeding 25% of the transcriptome. Notably, genes previously identified as regulating metamorphosis in other crustaceans do not fluctuate during this transition but in the later, morphologically-subtle puerulus-juvenile transition, indicating that the dramatic phyllosoma-puerulus morphological shift relies on a different, yet to be identified metamorphic mechanism. We examined the change in expression of domains and gene families, with focus on several key genes. Our research implies that the separation in molecular triggering systems between the phyllosoma-puerulus and puerulus-juvenile transitions might have enabled the extension of the oceanic phase in spiny lobsters. Study of similar transitions, where metamorphosis is uncoupled from the transition into the benthic juvenile form, in other commercially important crustacean groups might show common features to point on the evolutionary advantage of this two staged regulation.

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Jasus and Sagmariasus Species

Cited by 29 publications

References 147 publications

Outlier SNPs enable food traceability of the southern rock lobster, Jasus edwardsii

Outlier SNPs enable food traceability of the southern rock lobster, Jasus edwardsii

Differing environmental drivers of settlement across the range of southern rock lobster (Jasus edwardsii) suggest resilience of the fishery to climate change

Redefining metamorphosis in spiny lobsters: molecular analysis of the phyllosoma to puerulus transition in Sagmariasus verreauxi

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