Search results

Title: First Record of the Dwarf False Catshark, Planonasus parini (Carcharhniformes Pseudotriakis) from Sri Lanka
Description: The dwarf false catshark, Planonasus parini, is a soft, stout to slender bodied poorly known deepwater shark, known previously only from the Socotra Islands, southwestern India, and possibly off the Maldives. Here we report on the first record of the Dwarf False Catshark from Sri Lanka, Southwest Bay of Bengal. The specimen, estimated to be approximately 55 cm in total length, was caught by a local fisherman between 300 m and 600 m depth off Trincomalee Outer Harbour near Norway Inlet (08 29'.136N, 81 14'.783E).
Author: Ebert, De Silva, Goonewardena

Title: Etmopterus alphus n. sp.: a new lanternshark (Squaliformes: Etmopteridae) from the south-western Indian Ocean
Description: Article in Press, A new species of lanternshark, Etmopterus alphus (Squaliformes: Etmopteridae), is described from the south-western Indian Ocean. The new species resembles other members of the ‘Etmopterus lucifer’ clade in having linear rows of dermal denticles and most closely resembles E. molleri from the south-western Pacific. The new species is fairly common along the upper continental slopes off central Mozambique, at depths between 472 and 558 m, and is also found on the southern Madagascar Ridge in 650–792 m depth. It can be distinguished from other members of the E. lucifer clade by a combination of characteristics, including arrangement of flank and caudal markings, dimension of flank markings and shape, size and arrangement of dermal denticles along the body. Molecular analysis further supports the distinction of E. alphus from other members of the E. lucifer clade.
Author: Ebert, Straube, Leslie, Weigmann

Title: Trophic ecology of the gopher rockfish Sebastes carnatus inside and outside of central California marine protected areas
Description: Marine protected areas (MPAs) can potentially alter food web dynamics by increasing the density of fishes within their borders. Such increases in the density of potential competitors can cause generalist predators to contract the scope of their diets. This study investigated the effects of increased conspecific fish density on the diets of gopher rockfish Sebastes carnatus at a 35 yr old MPA in Point Lobos, California, and at 4 newly established MPAs in Año Nuevo, Point Lobos, Piedras Blancas, and Point Buchon in central California. Analyses were conducted for 707 stomachs collected from 2007 to 2009. Diets did not differ inside versus outside the old Point Lobos MPA in terms of prey richness, evenness, composition, or gopher rockfish trophic level. However, fish outside the MPA had greater levels of individual specialization. No consistent differences in these metrics were observed inside versus outside the 4 new MPAs, although prey composition and evenness did differ significantly among geographic locations. Diets at Año Nuevo, the most northern and shallow location, consisted predominantly of Cancer spp. and porcelain crabs (Porcellanidae), while diets from southern, deeper locations were dominated by brittle stars (Ophiuroidea). The case study of the old Point Lobos MPA indicates that fish feeding ecology may not change in an MPA after several decades. Differences in prey observed among geographic locations suggest variation in the community composition among central California's new MPAs, which may influence the effect of each MPA on food web dynamics over time. Copyright © 2015 Inter-Research., Export Date: 19 October 2015
Author: Loury, Bros, Starr, Ebert, Cailliet
Date: 2015-01-01T00:00:00Z

Title: Biodiversity, Life History, and Conservation of Northeastern Pacific Chondrichthyans
Description: The sharks, batoids, and chimaeras, collectively the class Chondrichthyes, are one of the most successful groups of fishes, with over 1250 species globally. Recent taxonomic revisions have increased their diversity by about 20% over the past 17 years (2000–2016). The Northeast Pacific Ocean is one of the top 20 most diverse regions/countries on the globe with 77 chondrichthyan species, a number less than a quarter that of the most species-rich area (Australia) but that has increased by 10% since 2000 to include three new species (two skates and a chimaera). In this chapter we discuss the species richness of chondrichthyans occurring in the Northeast Pacific Ocean, characterize their life histories, briefly review several fisheries, and summarize the conservation status of those chondrichthyans occurring in the region. Detailed descriptions and evaluations of fisheries can be found in Chapter 7 of AMB Volume 78.
Author: Ebert, Bigman, Lawson

Title: Life history of the sevengill shark, Notorynchus cepedianus Peron, in two northern California bays.
Description: Abstract not available (old pdf)
Author: Ebert

Title: Confirmation of the cookiecutter shark, Isistius brasiliensis, from the eastern North Pacific Ocean (Squaliformes Dalatiidae)
Description: The cookiecutter shark, Isistius brasiliensis, is confirmed for the first time from the eastern North Pacific Ocean. The shark, a female 432 mm in total length, was caught in a sablefish pot at a depth of 1132 m off San Nicolas Island, California, USA (32°59′05″N 120°25′99″W).
Author: Ebert, Pien, Kamikawa

Title: The evolution of chondrichthyan research through a metadata analysis of dedicated international conferences between 1991 and 2014
Description: Science is continually evolving, with recent developments in some fields, such as conservation biology, leading to shifts in priorities and needs. Recent international conferences focused on chondrichthyan research provide an opportunity to assess how the research environment of chondrichthyan science has evolved through time. We compiled metadata from Sharks Down Under (1991) and the two Sharks International conferences (2010 and 2014), spanning 23 years. Analysis of the data highlighted taxonomic biases towards charismatic species, a declining number of studies in fundamental science such as those related to taxonomy and basic life history, and the emergence of new research fields or tools such as social science and stable isotope analysis. Although there are limitations associated with our study, which are discussed, it lays the foundation for continued assessment of the progression of chondrichthyan research as future chondrichthyan‑focused international conferences are organised. Considering the research biases that our metadata analysis identifies, we suggest that: (i) greater attention should be given to species or species groups that are of particular conservation concern but that may not necessarily be charismatic (e.g. batoids); (ii) increased support should be given to scientists from low‑income countries; (iii) new research areas should continue to be developed and included within broad integrated research programmes; and (iv) concurrent with this, foundational research should not be neglected. © 2015 NISC (Pty) Ltd., Cited By :2, Export Date: 4 September 2015
Author: Huveneers, Ebert, Dudley
Date: 2015-01-01T00:00:00Z

Title: Comparative age and growth of the Aleutian skate, Bathyraja aleutica, from the eastern Bering Sea and Gulf of Alaska
Description: The Aleutian skate (Bathyraja aleutica) is a large deep-water species that commonly occurs in bycatch of Alaskan trawl and longline fisheries. Although prominent in the skate biomass of the eastern Bering Sea (EBS) and Gulf of Alaska (GOA) ecosystems, minimal biological information exists. To increase our understanding of this potentially vulnerable species, and address the possibility of two separate populations in Alaskan waters, the age and growth of B. aleutica was studied. Vertebral centra were examined for age determination, and multiple growth models were evaluated to determine growth characteristics. Skates from the EBS attained maximum ages of 17 and 16 years for females and males, respectively, and the two-parameter von Bertalanffy growth functions generated estimates of k = 0.13 yr.-1 and L∞ = 162.1 cm for females, with similar results for males. Skates from the GOA reached 19 years in females and 18 years in males. Growth parameters of female skates from the GOA were estimated as k = 0.11 yr.-1 and L∞ = 160.0 cm, whereas males grew faster, with estimates of k = 0.15 yr.-1 and L∞ = 138.2 cm. The results of this study may indicate the presence of distinct populations of B. aleutica in the eastern North Pacific.
Author: Haas, Ebert, Cailliet

Title: First southeastern Atlantic record of the false catshark, Pseudotriakis microdon (Carcharhiniformes: Pseudotriakidae)
Description: The false catshark, Pseudotriakis microdon, is a large-bodied, poorly known deepwater shark, with a global distribution, except for the eastern Pacific and South Atlantic oceans. Here we report the first record of the false catshark from the southeastern Atlantic. The specimen, estimated to be approximately 290 cm in total length, was observed via an unmanned submersible 700 m depth off the western slope of Valdivia Seamount (26.2° S, 6.3° E).
Author: Clerkin, Ebert

Title: Revision of the genus Centrophorus (Squaliformes: Centrophoridae): Part 2—Description of two new species of Centrophorus and clarification of the status of Centrophorus lusitanicus Barbosa du Bocage & de Brito Capello, 1864
Description: Centrophorus specimens with a distinctive long-based first dorsal fin (long-finned species) have previously been considered to be Centrophorus lusitanicus first described from Portugal. Critical examination of the original description and illustration reveal that C. lusitanicus should be considered a junior synonym of C. granulosus. However, the specimen considered to be the syntype of C. lusitanicus in the Natural History Museum in London is clearly a long-finned species and not conspecific with C. granulosus. A more detailed investigation revealed that this specimen should not be considered a syntype and was likely not originally collected off the coast of Portugal. Investigation of long-finned specimens of Centrophorus from the Indo-West Pacific and Eastern Atlantic revealed that two undescribed species exist and are herein formally described as C. lesliei and C. longipinnis. The two species are similar morphologically and belong to the long-snout Centrophorus group (e.g. C. isodon and C. harrissoni) but are clearly separable based on their very long first dorsal fins. The two species differ in relative length of the first dorsal fin and several other characters. They also differ genetically. Nonmetric multidimensional ordination based on morphometric data reveals both species level and ontogenetic differences. A short erratum is also provided for Part 1 of this revision of the Centrophorus due to two figure related errors which may cause some confusion.
Author: White, Ebert, Naylor

Title: Redescription of Hydrolagus africanus (Gilchrist, 1922) (Chimaeriformes: Chimaeridae), with a review of southern African chimaeroids and a key to their identification
Description: Hydrolagus africanus (Gilchrist, 1922) is a little‑known chimaeroid species, originally described from the KwaZulu‑ Natal coast of South Africa, with a range spanning the western Indian Ocean from Kenya, south to Mozambique and South Africa, and extending into the south‑eastern Atlantic to Namibia. This species is characterised by a lateral patch of denticles on the male prepelvic tenacula, a second dorsal fin slightly indented in the centre, a long, curved dorsal spine equal to or sometimes exceeding the height of the first dorsal fin, and a uniform light brown body with no distinctive markings or patterns and slightly darker brown fins. To clarify the taxonomic status of H. africanus, we examined and compared specimens from throughout its range in southern Africa. Because the syntypes of H. africanus are lost, we designate a neotype and redescribe the species based on the neotype and additional southern African specimens. In addition, we present a review of southern African chimaeroids and provide an updated key to their identification. © 2015 NISC (Pty) Ltd., Cited By :1, Export Date: 4 September 2015
Author: Walovich, Ebert, Long, Didier
Date: 2015-01-01T00:00:00Z

Title: Rhinobatos austini n. sp., a new species of guitarfish (Rhinopristiformes: Rhinobatidae) from the Southwestern Indian Ocean
Description: Rhinobatos austini sp. n. is described from the southwestern Indian Ocean based on four specimens collected from the KwaZulu-Natal Province, South Africa and from Mozambique. The new species, with one exception, can be distinguished from all other members of this genus by a prominent teardrop-shaped dark blotch on the ventral surface of its snout. Its closest congener, R. holcorhynchus, also has a prominent teardrop-shaped blotch on its snout, but the new species differs from it by a lack of prominent thorns and tubercles on it dorsal disc surface and a very striking dorsal surface colour pattern of paired spots, some forming darker transverse bands across its back. Geographically, these two species broadly overlap, but R. austini appears to be a shallow, more coastal species (<1-107 m) compared to R. holcorhynchus that has a mostly offshore (75-254 m) depth distribution.
Author: Ebert, Gon

Title: Advances in Shark Research
Description: Export Date: 4 September 2015
Author: Ebert, Huveneers, Dudley
Date: 2015-01-01T00:00:00Z

Title: First record of the megamouth shark, Megachasma pelagios, (Chondrichthyes: Lamniformes: Megachasmidae) from Sri Lanka, northern Indian Ocean
Description: The megamouth shark, Megachasma pelagios, is a rare and poorly studied shark. In this paper, the first record of the megamouth shark is reported for Sri Lanka. The shark, a juvenile estimated at 180 cm in total length, was caught in a gillnet in close proximity (<92Â km) to the Negombo fisheries harbour (7°12′11.67″N 79°49′44.35″E)., Article
Author: Fernando, Perera, Ebert

Title: Bythaelurus bachi n. sp., a new deep-water catshark (Carcharhiniformes, Scyliorhinidae) from the southwestern Indian Ocean, with a review of Bythaelurus species and a key to their identification.
Description: A new deep-water catshark, Bythaelurus bachi, is described based on 44 specimens caught on the southern Madagascar Ridge in the southwestern Indian Ocean. The new species is the only stout-bodied Bythaelurus with oral papillae in the region and is distinguished from all congeners by the plain beige to light gray-brown coloration, high diversity in dermal denticle morphology, and presence of composite oral papillae. Despite resemblance in body shape, Bythaelurus bachi n. sp. is distinguished from its closest congener, B. naylori Ebert & Clerkin, 2015, by the presence of numerous large, partially composite papillae on the tongue and roof of the mouth (vs. papillae lacking), plain light coloration (vs. medium to dark brown ground color, light fin edges and a distinctly dark dusky-colored snout), only slightly enlarged dermal denticles on the anterior upper caudal-fin margin (vs. dermal denticles distinctly enlarged), a higher diversity in dermal denticle morphology in general, and smaller maximum size and size at maturity. The distinction of both species is also supported by molecular results. The new species differs from all other congeners in the western Indian Ocean in the stout body shape of large specimens, coloration, larger size, as well as several morphometrics, including larger claspers, longer eyes and dorsal fins, and shorter pelvic—anal and pelvic—caudal spaces. The genus is reviewed, a key to its species given.
Author: Weigmann, Ebert, Clerkin, Stehmann, Naylor

Title: An evaluation of mercury offloading in two Central California elasmobranchs
Description: Elasmobranchs occupy high trophic levels, accumulate high concentrations of mercury in their tissues, and have high energetic levels of maternal investment to offspring, which may cause embryos to be exposed in utero to harmful concentrations of mercury. We investigated the maternal transfer of mercury in two common coastal elasmobranch species, Triakis semifasciata and Platyrhinoidis triseriata, to determine which reproductive parameters may influence mercury offloading, and whether embryos are at risk to mercury toxicity. Mercury concentration was measured in female muscle, female liver, and embryonic tissues. The behavior of mercury in adult female tissues differed between species, as liver mercury concentration was significantly correlated to muscle mercury concentration in P. triseriata but not in T. semifasciata. Embryos of both species were found with potentially harmful mercury concentrations in their muscle tissues. Embryo mercury concentration increased with female muscle mercury concentration, but the relationship to female liver mercury was more variable. The rate of mercury transfer and overall offloading potential were significantly greater in P. triseriata than T. semifasciata. It appears that female mercury concentration, either in muscle or liver, is an important influencing factor for mercury offloading, but the impact of the differing reproductive modes in these two species was less clear. More study on this subject will continue to elucidate the factors influencing mercury offloading in sharks and rays, and how contaminant risk affects populations on a whole.
Author: van Hees, Ebert

Title: Hydrolagus erithacus sp. nov.(Chimaeriformes: Chimaeridae), a new species of chimaerid from the southeastern Atlantic and southwestern Indian oceans
Description: A new species of chimaerid, Hydrolagus erithacus sp. nov., is described from nine specimens collected from the southeast Atlantic and southwest Indian oceans from depths of 470–1,000 meters. This species is distinguished from all other Hydrolagus species based on the following characteristics: head bulky, relatively large, followed by stocky body; head and body height from about pectoral fin origin to pelvic fin origin similar, then tapering rapidly to filamentous tail; first dorsal fin spine height about equal to, or slightly less than first dorsal fin apex height; second dorsal fin up to 81% of total body length and uniform in height; trifurcate claspers forked for approximately 20% of total length; robust frontal tenaculum nearly uniform in width, prepelvic tenaculae with five to seven medial spines, and a uniform black coloration with robust, non-deciduous skin. Comparison of mitochondrial NADH2 gene sequences with other morphologically similar Hydrolagus species suggests that H. erithacus is a distinct species.
Author: Walovich, Ebert, Kemper

Title: Beyond Jaws: rediscovering the ‘lost sharks’ of southern Africa
Description: Southern Africa has one of the richest and most diverse chondrichthyan faunas in the world, comprising all 13 orders, 49 families, 111 genera and approximately 204 species. This represents nearly 20% of all known chondrichthyans, and includes 117 shark, 79 batoid and 8 chimaera species. A greater diversity of chondrichthyan species is seen on the east coast (n = 175) compared to the west coast (n = 96), especially among the families Carcharhinidae and Dasyatidae. The cumulative number of species added to the fauna has increased over the past 112 years from 28 to 204. A golden age of southern African chondrichthyan research occurred between 1967 and 1976 when 46 species were added to the fauna, 16 of which were newly described. A total of 5 families, 23 genera and 130 species have been described from southern Africa. Three families, 17 genera and 75 species are still considered valid. In all, 59 researchers have authored new species descriptions of southern African chondrichthyans, with 95 of 130 species being described by just 14 authors. The most new species described were by JLB Smith with 18, followed by J Müller and FGJ Henle, who collaborated to author 12 new species descriptions. A review of the conservation status of 189 chondrichthyan species indicates that 29% have been assessed as Vulnerable or higher (more threatened), a much higher percentage than the 17.4% of chondrichthyans globally. Of particular concern is that 13% are species endemic to southern Africa. Despite increased chondrichthyan awareness and popularity, most research and conservation efforts centre on a few charismatic species, while the future of little-known species remains ‘lost’ from the public and scientific consciousness. © 2015 NISC (Pty) Ltd., Cited By :4, Export Date: 4 September 2015
Author: Ebert, van Hees
Date: 2015-01-01T00:00:00Z

Title: Age and Growth of Elasmobranchs and Applications to Fisheries Management and Conservation in the Northeast Pacific Ocean
Description: In addition to being an academic endeavour, the practical purpose of conducting age and growth studies on fishes is to provide biological data to stock assessment scientists and fisheries managers so they may better understand population demographics and manage exploitation rates. Age and size data are used to build growth models, which are a critical component of stock assessments. Though age determination of elasmobranchs in the northeast Pacific Ocean (NEP) began in the 1930s, the field has evolved substantially in recent years, allowing scientists to incorporate age data into assessments for more species than ever before. Owing to the highly diverse biology of this group of fishes, each species has its own set of challenges with regard to age determination. Age determination methods typically rely on semicalcified hard structures that form regular growth patterns; however, the structure selected and preparation method used is often species specific. New staining techniques have improved the ability to assess age and improve ageing precision for some species, and advances in microchemical methods have allowed for independent means of estimating age and validating age determination accuracy. Here we describe current age determination methods for NEP elasmobranchs. While the library of available techniques is increasing, there are still some NEP species for which reliable ageing methods have yet to be defined; we discuss these challenges and potential avenues of future research. Finally, we conclude by describing how age estimates are used in growth models and subsequently in stock assessments of selected NEP elasmobranchs.
Author: Matta, Tribuzio, Ebert, Goldman, Gburski

Title: Study on Conservation Priorities for Shark and Ray Species included and proposed for inclusion in Annex 1 to the CMS Memorandum of Understanding on the Conservation of Migratory Sharks
Description: The Convention on the Conservation of Migratory Species of Wild Animals (UNEP/CMS) currently lists 29 elasmobranch species (13 sharks and 16 rays) on its Appendices I and/or II, with Appendix I requesting the full protection of species and II the development of a specialized (“regional”) agreement to foster cooperation of all Range States to conserve the listed species. All species of sharks and rays are included in Appendix II, which means that these species would benefit from international cooperation, and 19 species are additionally included in Annex 1 of the Convention. In 2010 a specialized agreement as foreseen for Appendix II listed species was concluded for migratory sharks. This Memorandum of Understanding for migratory Sharks (Sharks MOU) already includes seven species in Annex 1.
Author: Ebert

Title: Notoraja martinezi sp. nov., a new species of deepwater skate and the first record of the genus Notoraja Ishiyama, 1958 (Rajiformes Arhynchobatidae) from the eastern Pacific Ocean
Author: Concha, Ebert, Long

Title: Etmopterus samadiae n. sp., a new lanternshark (Squaliformes: Etmopteridae) from Papua New Guinea
Description: A new species of lanternshark, Etmopterus samadiae (Squaliformes: Etmopteridae), is described from off northern Papua New Guinea, in the western Central Pacific Ocean. The new species resembles other members of the "Etmopterus lucifer" clade in having linear rows of dermal denticles and most closely resembles E. brachyurus from the western North Pacific. The new species occurs along insular slopes between 340 and 785 m depth. The new species can be distinguished from other members of the E. lucifer clade by a combination of characteristics, including length of anterior flank branch markings being slightly shorter than its posterior branch, a longer caudal base marking, and irregular and variable number of black, horizontal, dash-like marks on sides of body. Molecular analysis based on the NADH2 marker further supports the distinction of E. samadiae from other members of the E. lucifer clade. © 2017 Magnolia Press., Export Date: 12 April 2017, Article, Correspondence Address: White, W.T.; CSIRO Oceans and Atmosphere, GPO Box 1538, Australia; email: william.white@csiro.au, Funding details: ACIAR, Australian Centre for International Agricultural Research, Funding details: NSF, National Science Foundation, Funding text: The senior author was supported by a project on the shark and ray resources of Papua New Guinea funded by the Australian Centre for International Agricultural Research (ACIAR; project FIS/2012/102), CSIRO Oceans & Atmosphere, and the National Fisheries Authority (NFA). Two of us (WW, SC) were also supported a National Science Foundation grant (Jaws and Backbone: Chondrichthyan Phylogeny and a Spine for the Vertebrate Tree of Life; DEB-01132229)., References: Bigelow, H.B., Schroeder, W.C., A study of the sharks of the suborder squaloidea (1957) Bulletin of the Museum of Comparative Zoology, 117, pp. 1-150; Chan, W.L., New sharks from the south China sea (1966) Journal of Zoology (London), 148, pp. 218-237. , https://doi.org/10.1111/j.1469-7998.1966.tb02949.x; Ebert, D.A., Compagno, L.J.V., DeVries, M.J., A new lanternshark (Squaliformes: Etmopteridae: Etmopterus) from southern Africa (2011) Copeia, 2011, pp. 379-384. , https://doi.org/10.1643/CI-09-183; Ebert, D.A., Straube, N., Leslie, R.W., Weigmann, S., Etmopterus alphus n. Sp.: A new lanternshark (Squaliformes: Etmopteridae) from the south-western indian ocean (2016) African Journal of Marine Science, 2016, pp. 1-12. , [published online]; Fricke, R., Allen, G.R., Andréfouët, S., Chen, W.-J., Hamel, M.A., Laboute, P., Mana, R., Uyeno, D., Checklist of the marine and estuarine fishes of madang District, Papua New Guinea, western pacific Ocean, with 820 new records (2014) Zootaxa, 3834 (1), pp. 1-247. , https://doi.org/10.11646/zootaxa.3832.1.1; Jordan, D.S., Snyder, J.O., Descriptions of two new species of squaloid sharks from Japan (1902) Proceedings of the United States National Museum, 25 (1279), pp. 79-81; Kotlyar, A.N., Dogfish sharks of the genus etmopterus rafinesque from the nazca and sala y Gómez submarine ridges (1990) Trudy Instituta Okeanologii Imeni P.P. Shirshova, 125, pp. 127-147; Last, P.R., Stevens, J.D., (2009) Sharks and Rays of Australia, p. 644. , CSIRO Publishing, Melbourne; Last, P.R., Burgess, G.H., Séret, B., Description of six new species of lantern-sharks of the genus etmopterus (Squaloidea: Etmopteridae) from the australasian region (2002) Cybium, 26 (3), pp. 203-223; Naylor, G.J.P., Ryburn, J.A., Ferigo, O., Lopez, A., Phylogenetic relationships among the major lineages of modern elasmobranchs (2005) Reproductive Biology and Phylogeny of Chondrichthyes: Sharks, Batoids and Chimaeras, pp. 1-25. , Hamlett, W.C. (Ed.), Science Publishers, Enfield; Pante, E., Corbari, L., Thubaut, J., Chan, T.Y., Mana, R., Boisselier, M.C., Bouchet, P., Samadi, S., Exploration of the deep-sea fauna of Papua New Guinea (2012) Oceanography and Marine Biology: An Annual Review, 25 (3), pp. 214-225. , https://doi.org/10.5670/oceanog.2012.65; Sabaj Pérez, M.H., (2016) Standard Symbolic Codes for Institutional Resource Collections in Herpetology and Ichthyology: An Online Reference, , http://www.asih.org/, Version 4.0 (28 June 2014). American Society of Ichthyologists and Herpetologists, Washington, DC. (accessed 26 September 2016); Samadi, S., Puillandre, N., Pante, E., Boisselier, M.C., Chen, W.J., Corbari, L., Maestrati, P., Hourdez, S., Patchiness of deep-sea communities in Papua New Guinea and potential susceptibility to anthropogenic disturbances illustrated by seep organisms (2014) Marine Ecology, 36, pp. 109-132; Schaaf-DaSilva, J.A., Ebert, D.A., Etmopterus burgessi sp. Nov., A new species of lanternshark (Squaliformes: Etmopteridae) from Taiwan (2006) Zootaxa, 1373, pp. 53-64; Smith, H.M., The squaloid sharks of the philippine Archipelago, with descriptions of new genera and species (1912) Proceedings of the United States National Museum, 41 (1877), pp. 677-685. , https://doi.org/10.5479/si.00963801.41-1877.677; Straube, N., Iglésias, S.P., Sellos, D.Y., Kriwet, J., Schliewen, U.K., Molecular phylogeny and node time estimation of bioluminescent lanternsharks (Elasmobranchii: Etmopteridae) (2010) Molecular Phylogenetics and Evolution, 56, pp. 905-917. , https://doi.org/10.1016/j.ympev.2010.04.042; Whitley, G.P., Studies in ichthyology. No. 12 (1939) Records of the Australian Museum, 20 (4), pp. 264-277. , https://doi.org/10.3853/j.0067-1975.20.1939.576
Author: White, Ebert, Mana, Corrigan
Date: 2017-01-01T00:00:00Z

Title: First North Pacific records of the pointy nosed blue chimaera, Hydrolagus cf. trolli (Chondrichthyes: Chimaeriformes: Chimaeridae)
Description: The occurrence of Hydrolagus cf. trolli is reported for the first time from the central and eastern North Pacific Ocean. This is a geographic range extension for this species, as it was previously only known to occur in the southern Pacific Ocean off of Australia, New Zealand, and New Caledonia.
Author: Reichert, Lundsten, Ebert

Title: Comparative age and growth of the Aleutian skate, Bathyraja aleutica, from the eastern Bering Sea and Gulf of Alaska
Description: The Aleutian skate (Bathyraja aleutica) is a large deep-water species that commonly occurs in bycatch of Alaskan trawl and longline fisheries. Although prominent in the skate biomass of the eastern Bering Sea (EBS) and Gulf of Alaska (GOA) ecosystems, minimal biological information exists. To increase our understanding of this potentially vulnerable species, and address the possibility of two separate populations in Alaskan waters, the age and growth of B. aleutica was studied. Vertebral centra were examined for age determination, and multiple growth models were evaluated to determine growth characteristics. Skates from the EBS attained maximum ages of 17 and 16 years for females and males, respectively, and the two-parameter von Bertalanffy growth functions generated estimates of k = 0.13 yr.-1 and L∞ = 162.1 cm for females, with similar results for males. Skates from the GOA reached 19 years in females and 18 years in males. Growth parameters of female skates from the GOA were estimated as k = 0.11 yr.-1 and L∞ = 160.0 cm, whereas males grew faster, with estimates of k = 0.15 yr.-1 and L∞ = 138.2 cm. The results of this study may indicate the presence of distinct populations of B. aleutica in the eastern North Pacific.
Author: Haas, Ebert, Cailliet

Title: First record of blurred smooth lanternshark, Etmopterus bigelowi from Indonesia
Description: The blurred smooth lanternshark, Etmopterus bigelowi Shirai and Tachikawa, 1993 was recorded for the first time from Indonesian waters based on two specimens collected from a deepwater shark fishery operated in the Flores Sea, eastern Indonesia. This is also the second confirmed record of Etmopterus species from this country.
Author: Fahmi, Ebert

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