Genetic diversity and population structure of the pot-belly seahorse<i>Hippocampus abdominalis</i>in New Zealand

Nickel, Jennifer Elisabeth; Cursons, Raymond T.

doi:10.1080/00288330.2011.632014

Cited by 15 publications

(21 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Analyses of historic demographic parameters were conducted using The backbone of the Hippocampus phylogeny was poorly resolved in this analysis (see also Boehm et al, 2013;Casey et al, 2004;Nickel & Cursons, 2012;Teske et al, 2004), but major groupings were consistent with previous publications. Table S1).…”

Section: Demographic Inferencementioning

confidence: 72%

“…Extracted DNA and/or fin clips of seahorses were imported under CITES permit CH005. Our haplotype numbering convention for mtCR follows Nickel and Cursons (2012), who identified fourteen mtCR haplotypes in a previous survey of New Zealand seahorses (Haplotypes 01-14). Sequences were aligned in Geneious v6.0.6 (http://www.genei ous.com, Kearse et al, 2012).…”

Section: Sample Collectionmentioning

confidence: 99%

“…aNickel and Cursons (2012) refer to these samples as Raglan2.jModelTest selected Tamura and Nei as the closest best-fit model of 88 possible models for downstream analyses of the mtCR locus. Bold values are summary statistics for the two major regions (AU, NZ) included in this study.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Navigating the southern seas with small fins: Genetic connectivity of seahorses (Hippocampus abdominalis) across the Tasman Sea

Ashe

Wilson

2019

Journal of Biogeography

View full text Add to dashboard Cite

Aim: Historical patterns of ocean circulation in the Southern Hemisphere have been well-studied, but the effects of coastal oceanography on marine biogeography in this region remain poorly understood relative to northern latitudes. Our study investigates historical and contemporary patterns of migration and dispersal across the Tasman Sea.Location: Coastal regions of the Tasman Sea including southeastern Australia, Tasmania and New Zealand.Taxon: Hippocampus abdominalis, the pot-bellied seahorse, one of the most broadly distributed seahorse species, and the only seahorse to have successfully colonized New Zealand from Australia across 2,000 km of open ocean. Methods:We used a multilocus genetic dataset to measure population diversity and differentiation from seahorses across the full species range to investigate contemporary and historical demography, and to reconstruct colonization routes across the Tasman Sea. Results:Genetic data indicate that seahorses colonized New Zealand from Australia during the previous interglacial-glacial cycle (12,000-120,000 ybp), and have evolved in relative isolation since the initial establishment event. Contemporary effective population sizes in the newly colonized range are substantially larger than those inferred in Australia, and both appear to be reduced relative to ancestral levels. Australian seahorses are genetically diverse and show high levels of population connectivity, while the distribution of genetic variation in New Zealand suggests an initial colonization of the South Island following by northward migration. Importantly, despite clear evidence that New Zealand seahorses are descendent from Australian ancestors, patterns of contemporary genetic diversity are consistent with trans-Tasman migration from New Zealand to Australia, suggesting that genetic variation accumulated in the newly colonized range may be contributing to the genetic diversity of Australian seahorses.Main conclusions: Despite a largely independent evolutionary trajectory of seahorses separated by the Tasman Sea, haplotype sharing between populations in Australia and New Zealand suggests that secondary genetic exchange is contributing to the contemporary phylogeography of the species. Patterns of genetic structure in H. abdominalis mirror those found in other rafting species, suggesting that adult dispersal via rafting has been an important vector of marine dispersal in this species. 197

show abstract

Section: Demographic Inferencementioning

confidence: 72%

Section: Sample Collectionmentioning

confidence: 99%

See 1 more Smart Citation

Navigating the southern seas with small fins: Genetic connectivity of seahorses (Hippocampus abdominalis) across the Tasman Sea

Ashe

Wilson

2019

Journal of Biogeography

View full text Add to dashboard Cite

show abstract

“…We observed relatively low diversity within leafy seadragons. Genetic diversity of microsatellites reported within other seahorse and pipefish species are generally higher: Observed diversity found within the Western Australian seahorse, Hippocampus angustus, ranged between 0.73-0.95 [18]; diversity within the Gulf pipefish, Syngnathus scovelli, ranged between 0.88-0.95, and within the dusky pipefish, Syngnathus floridae, between 0.78-0.95 [19]; diversity within the broadnosed pipefish, Syngnathus typhle between 0.55-0.95 [19]; and diversity within the pot bellied seahorse, Hippocampus abdominalis, between 0.87 and 0.98 [20]. Only the observed diversities within the long snouted seahorse, Hippocampus guttulatus, between 0.31 and 0.85, was found to be similar to those reported here [21], and diversity within the spotted seahorse, Hippocampus kuda, 0.00-0.30 was found to be lower [22].…”

Section: Syngnathus Leptorhynchus)mentioning

confidence: 99%

“…Due to population parameters, such as low levels of dispersal, small home ranges, and high population structuring, seadragons are thought to be vulnerable to local extinctions through pollution, habitat loss, and overharvest [2,7]. The Australian government has relatively strict regulations on the harvest of seadragons, allowing little take by collectors [9,20]. The most obvious threats to seadragons today are habitat degradation, loss in quality and quantity of habitat, and harassment by recreational divers [2,3,7].…”

Section: Syngnathus Leptorhynchus)mentioning

confidence: 99%

Novel Microsatellite Loci Variation and Population Genetics within Leafy Seadragons, Phycodurus eques

et al. 2014

View full text Add to dashboard Cite

Novel leafy seadragon (Phycodurus eques) microsatellite loci were developed via standard cloning techniques and tested for use in population genetics studies. Six out of a total of twelve microsatellites tested were usable for population analysis. Seadragon samples from Western Australia (N = 6), Southern Australia (N = 11), and a captive group (N = 11) were analyzed. Here, we present leafy seadragon microsatellite primer sequences for all 12 loci and population genetics statistics for the six loci that amplified consistently and displayed adequate variability to estimate population parameters, such as diversity, population differences, and relatedness. Observed heterozygosities ranged from 0.225 to 0.926 and expected heterozygosities ranged from 0.278 to 0.650. Pairwise differences among populations (F ST estimates) from samples collected off the southern coast of Western and South Australia, and captive animals ranged from a low of 0.188 between Southern Australia and captive animals, to a high of 0.212 between Western Australia and captive animals. Statistical assignment analyses suggested between one and three populations. Percent first order relatives among individuals was high and ranged from 40 within Western Australia to 55 within captive animals. These loci were tested on other species including weedy seadragons (Phyllopteryx taeniolatus), as well as assorted

show abstract

A synthesis of European seahorse taxonomy, population structure, and habitat use as a basis for assessment, monitoring and conservation

et al. 2017

View full text Add to dashboard Cite

Accurate taxonomy, population demography, and habitat descriptors inform species threat assessments and the design of effective conservation measures. Here we combine published studies with new genetic, morphological and habitat data that were collected from seahorse populations located along the European and North African coastlines to help inform management decisions for European seahorses. This study confirms the presence of only two native seahorse species (Hippocampus guttulatus and H. hippocampus) across Europe, with sporadic occurrence of non-native seahorse species in European waters. For the two native species, our findings demonstrate that highly variable morphological characteristics, such as size and presence or number of cirri, are unreliable for distinguishing species. Both species exhibit sex dimorphism with females being significantly larger. Across its range, H. guttulatus were larger and found at higher densities in cooler waters, and individuals in the Black Sea were significantly smaller than in other populations. H. hippocampus were significantly larger in Senegal. Hippocampus guttulatus tends to have higher density populations than H. hippocampus when they occur sympatrically. Although these species are often associated with seagrass beds, data show both species inhabit a wide variety of shallow habitats and use a mixture of holdfasts. We suggest an international mosaic of protected areas focused on multiple habitat types as the first step to successful assessment, monitoring and conservation management of these Data Deficient species.Electronic supplementary materialThe online version of this article (10.1007/s00227-017-3274-y) contains supplementary material, which is available to authorized users.

show abstract

Genetic diversity and population structure of the pot-belly seahorseHippocampus abdominalisin New Zealand

Cited by 15 publications

References 24 publications

Navigating the southern seas with small fins: Genetic connectivity of seahorses (Hippocampus abdominalis) across the Tasman Sea

Navigating the southern seas with small fins: Genetic connectivity of seahorses (Hippocampus abdominalis) across the Tasman Sea

Novel Microsatellite Loci Variation and Population Genetics within Leafy Seadragons, Phycodurus eques

A synthesis of European seahorse taxonomy, population structure, and habitat use as a basis for assessment, monitoring and conservation

Contact Info

Product

Resources

About