Andrew L. Stewart

Andrew L. Stewart
Museum of New Zealand, Te Papa Tongarewa

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111
Publications
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Publications

Publications (111)
Article
Full-text available
Marine ecosystems are difficult to sample quantitatively at increasing depth. Hence, few studies attempt to measure patterns of beta diversity for ecological communities in the deep sea. Here we (i) present and quantify large-scale gradients in fish community structure along depth and latitude gradients of the New Zealand EEZ, (ii) obtain rigorous...
Article
A single specimen of a new Bathyraja skate was collected by the authors in 2003 during a survey of the deepwater biota of the northern Tasman Sea by the New Zealand FRV Tangaroa. This skate, labelled the 'blonde skate' by voyage participants, is uniformly white on all surfaces of the body and the skin is partly translucent. It belongs to a subgroup...
Article
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Five visits to the Kermadec Islands between 2004 and 2013 have increased the number of confirmed fish species from the region. The most intensive survey of shore fishes from all island groups of the Kermadec Islands was undertaken in May 2011. Additional fishes were recorded during surveys undertaken in 2004, 2012 and 2013. The main method used was...
Article
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Hagfishes from New Zealand are reviewed and a phylogeny proposed using morphological and genetic data (DNA sequences of cytochrome c oxidase subunit I gene, COI, and the small subunit RNA, 16S). Eptatretus cryptus sp. nov. was previously confused with Eptatretus cirrhatus (Forster in Bloch & Schneider, 1801) because of their similar morphology, and...
Article
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Two new species of the aulopiform family Aulopidae are described from waters off northern New Zealand, eastern Australia and the Tasman Sea. Hime pyrhistion sp. nov., previously confused with Hime japonica (Gunther, 1877), differs from that species in having a higher dorsal fin in both males and females, together with slight differences in colourat...
Article
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Two surveys were carried out in the Ross Sea region during February and March 2004 and 2008 from the New Zealand RV Tangaroa. Fishes were sampled on the continental shelf and slope of the Ross Sea, and on adjacent seamounts to the north, mainly using a large demersal fish trawl and a large mesopelagic fish trawl. Parts of the shelf and slope were s...
Article
A new deep-water catshark, Apristurus garricki sp. nov., is described from northern New Zealand waters. This species is a member of the longicephalus-group and has a conspicuously elongated prenarial snout and short duodenum and is morphologically similar to A. herklotsi from the western North Pacific and A. australis from Australian waters. A. gar...
Article
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Feeding habits of three hagfish species were investigated along a depth gradient (~50-900 m) in New Zealand using nitrogen (δ15N) and carbon (δ 13C) stable isotopes. Neomyxine biniplicata had the lowest mean δ15N value (14.2 ‰), followed by Eptatretus cirrhatus (14.9 ‰) and Eptatretus sp1 (15.8 ‰). Neomyxine biniplicata (ca. 50 m depth) was charact...
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Species of the anglerfish genus Chaunax Lowe, 1846 from the New Zealand region are taxonomically reviewed with six species recognized and described: Chaunax penicillatus McCulloch; C. nudiventer Ho & Shao, a new record for New Zealand; and four species new to science. Chaunax flavomaculatus sp. nov. distinguished by having its skin covered with a m...
Article
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Continental slopes are among the steepest environmental gradients on earth. However, they still lack finer quantification and characterisation of their faunal diversity patterns for many parts of the world. Changes in fish community structure and diversity along a depth gradient from 50 to 1200 m were studied from replicated stereo baited remote un...
Data
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Taxa identified from video deployments at three locations in New Zealand waters, arranged by their occurrence within each of seven depth strata (50, 100, 300, 500, 700, 900 and 1200 m). (PDF)
Data
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Number of video samples taken over different types of habitat, as indicated, within each depth stratum. (PDF)
Data
Full-text available
Taxa identified from video deployments at three locations in New Zealand waters (ordered phylogenetically). (PDF)
Data
Full-text available
Taxa identified from video deployments at three locations in New Zealand waters (ordered alphabetically). (PDF)
Article
Full-text available
The Southern Ocean occupies about 10% of the world’s oceans but has low species richness with only ~1.5% of the marine fishes. Within the Southern Ocean the Ross Sea region is one of the least exploited sea areas in the world, but is subject to commercial fishing. The fauna are not well known and preliminary IPY molecular studies have indicated tha...
Article
Eviota kermadecensis is described as a new species from the Kermadec Islands, mainly from Raoul Island, and is the only species of Eviota known from the Kermadec Islands. It is most similar to E. abax and E. masudai from Japan in morphology and fin-ray counts. All three species normally have I,10 second dorsal fin-ray counts. Eviota kermadecensis d...
Article
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A new Macrourus species from the southern hemisphere is described. It was first recognised from the Ross Sea, Antarctica after specimens sampled during the International Polar Year in 2008 showed significant genetic differences (C01) among those initially identified as M. whitsoni (Regan). M. caml sp. nov. has 8 (rarely 7 or 9) pelvic fin rays, a b...
Article
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The Scorpaena cardinalis complex, including S. cardinalis, S. jacksoniensis and S. orgila, is defined. The genus Ruboralga (type species: S. jacksoniensis) is regarded as a junior synonym of Scorpaena. Scorpaena jacksoniensis Steindachner 1866, previously treated as a junior synonym of Scorpaena cardinalis Solander and Richardson 1842, is regarded...
Article
Full-text available
Hagfishes (Myxinidae), a family of jawless marine pre-vertebrates, hold a unique evolutionary position, sharing a joint ancestor with the entire vertebrate lineage. They are thought to fulfil primarily the ecological niche of scavengers in the deep ocean. However, we present new footage from baited video cameras that captured images of hagfishes ac...
Article
Full-text available
DNA barcoding strongly suggests that specimens of the slender codling (Halargyreus johnsonii) from New Zealand and Tasmania belong to a different species to H. johnsonii reported from other areas. Sequence divergence between the two groups averaged 3.95%, much higher than within-group divergences of 0.03 and 0.02% for specimens, respectively, from...
Article
Although three species of the genus Macrourus are recognized in the Southern Ocean, DNA sequencing of the mitochondrial COI gene revealed four well-supported clades. These barcode data suggest the presence of an undescribed species, a conclusion supported by meristic and morphometric examination of specimens.