NEWSLETTER 08/2018 06.08.2018

Please acknowledge use of the database www.shark-references.com in your publications, and cite: 

Pollerspöck, J. & Straube, N. 2018, Bibliography database of living/fossil sharks, rays and chimaeras (Chondrichthyes: Elasmobranchii, Holocephali), www.shark-references.com, World Wide Web electronic publication, Version 2018

FLAMMENSBECK, C.K. & POLLERSPÖCK, J. & SCHEDEL, F.D.B. & MATZKE, N.J. & STRAUBE, N.  (2018) Of teeth and trees: A fossil tip‐dating approach to infer divergence times of extinct and extant squaliform sharks. Zoologica Scripta, in press

Abstract: Fossil tip‐dating allows for the inclusion of morphological data in divergence time estimates based on both extant and extinct taxa. Neoselachii have a cartilaginous skeleton, which is less prone to fossilization compared to skeletons of Osteichthyans. Therefore, the majority of the neoselachian fossil record is comprised of single teeth, which fossilize more easily. Neoselachian teeth can be found in large numbers as they are continuously replaced. Tooth morphologies are of major importance on multiple taxonomic levels for identification of shark and ray taxa. Here, we review dental morphological characters of squalomorph sharks and test these for their phylogenetic signal. Subsequently, we combine DNA sequence data (concatenated exon sequences) with dental morphological characters from 85 fossil and extant taxa to simultaneously infer the phylogeny and re‐estimate divergence times using information of 61 fossil tip‐dates as well as eight node age calibrations of squalomorph sharks. Our findings show that the phylogenetic placement of fossil taxa is mostly in accordance with their previous taxonomic allocation. An exception is the phylogenetic placement of the extinct genus †Protospinax, which remains unclear. We conclude that the high number of fossil taxa as well as the comprehensive DNA sequence data for extant taxa may compensate for the limited number of morphological characters identifiable on teeth, serving as a backbone for reliably estimating the phylogeny of both extinct and extant taxa. In general, tip‐dating mostly estimates older node ages compared to previous studies based on calibrated molecular clocks.

Paper request via researchgate or please send a mail to Nico or Jürgen!

BARCELOS, L.M.D. & AZEVED, J.M.N. & POLLERSPÖCK, J. & BARREIROS, J.P.  (2018): Review of the records of the smalltooth sand tiger shark, Odontaspis ferox(Elasmobranchii: Lamniformes: Odontaspididae), in the Azores. Acta Ichthyologica Et Piscatoria, 48 (2): 189–194

Free download via researchgate

In recent years Azorean fishermen reported the presence of the smalltooth sand tiger shark, Odontaspis ferox (Risso, 1810), a very rare demersal shark species, associated with insular shelves and slopes, with occasional incursions into shallow waters and of poorly known biology and ecology. There are fourteen new records of this species, between 1996 and 2014, captured by spearfishing, harpoons, hand lines, or entangled in fishing gear in the Azores. These records were analysed and complemented with fishermen interviews, providing new locations and new biological data for this species. Also, specimens photographs were studied and post-mortem analysis were carefully carried out in one individual.
This species is rare and captured only as bycatch in shallow waters. More detailed information on this species is critically needed in order to assess its conservation status and implement management guidelines. Bycatch statistics are crucial in this respect.


Two new poster, co-authored by Nico Straube, editor of shark-references.



Would you like to become a shark-reference partner? Please contanct us per E-mail!


Partner in Google-Maps




New Images

Many thanks to the following people for providing images:

Frederik H. Mollen (Elasmobranch Research Belgium) for the images of Rhina ancylostoma BLOCH & SCHNEIDER, 1801 ERB 1115, male, 52,0 cm DW, 96,0 cm TL, Singapore 

Rasmus Loeth Petersen for the image of Oxynotus centrina (LINNAEUS, 1758); immature female, 565 mm TL, caught south-east of Malta between May and June at a depth of 60–100m<5 km from shore

R. Dean Grubbs for the images of the holotype of Squalus clarkae PFLEGER, GRUBBS, COTTON & DALY-ENGEL, 2018; FMNH UF239318, holotype, female, adult, 712.5 mm TL, Gulf of Mexico

David A. Ebert & Jenny M. Kemper & Kristin Walovich & Kimberly L. Quaranta for the permission to use the images of Hydrolagus macrophthalmus DE BUEN, 1959 MNHNC P. 7282 (ex EBMC 10192), adult male, 391 mm TL, 309 mm BDL, Punta Angeles, Valparaiso, Chile. Photo taken by Marty Schmidt

Pradip Patade, India for images of
Pateobatis bleekeri (BLYTH, 1860) and Pateobatis fai (JORDAN & SEALE, 1906)

Missing papers:

Many thanks to all friends of shark-references, who sent us some missing papers last month!

Shark-References would kindly like to ask you for your contribution to this project.

At the moment we are looking for some of the following papers:

Extinct Chondrichthyes:

CAPPETTA, H. & PFEIL, F.H. & SCHMIDT-KITTLER, N. 2000 New biostratigraphical data on the marine Upper Cretaceous and Palaeogene of Jordan. Newsletters on Stratigraphy, 38: 81–95.
MAO, Y. & MA, Q. & FENG, Q. 2013 Discovery of Fish Microremains in the Gufeng Formation at the Luojiaba Section from Jianshi, West Hubei. Acta Micropalaeontologica Sinica, 30 (2): 175–183

Extant Chondrichthyes:

Please support www.shark-references.com and send missing papers (not listed papers or papers without the info-symbol) to juergen.pollerspoeck@shark-references.com or nicolas.straube@shark-references.com



Upcoming Meetings:

Please inform us about new upcoming meetings!


II Joint Congress on Evolutionary Biology – Montpellier 2018

ESEB is delighted to welcome you to the Second Joint Congress on Evolutionary Biology. Joint Congresses take place every six years and bring together four of the world's largest academic societies in the field of evolutionary biology: the European Society for Evolutionary Biology, the American Society of Naturalists, the Society for the Study of Evolution and the Society of Systematic Biologists. The first joint congress was in Ottawa, Canada in 2012. The current (i.e. second) will be held in Montpellier, France, on August 19-22 2018.


Save the date! 25. - 29. March 2019

The Mexican Society of Cartilaginous Fishes A.C., in coordination with the Planetarium of Playa del Carmen SAYAB, invites to participate in the First Latin American Conference of Sharks, Rays and Chimaeras, and the VIII National Symposium of Sharks and Rays.


5th International Whale Shark Conference (IWSC5) from 28-31 May 2019

From 28-31 May 2019, the town of Exmouth in the Ningaloo Coast World Heritage Area will welcome delegates to the 5th International Whale Shark Conference (IWSC5), a meeting of the world’s leading whale shark scientists, conservationists, natural resource managers and tourism managers. This is the fifth such conference to be held, following on from the successful IWSC4 held in Doha, Qatar in 2016. This meeting is timed to showcase Ningaloo’s world’s best practice whale shark management program and will follow the Ningaloo Whaleshark Festival, an annual community event that celebrates these magnificent animals.
IWSC5 will bring together local scientists, researchers and postgraduate students to interact with international colleagues and collaborators to explore all aspects of whale shark biology and ecology and how this can translate to direct, on-ground conservation efforts. Delegates from around the world will be treated to four days of presentations, workshops, social functions and experiencing the world renowned Ningaloo whale shark tourism industry to forge new relationships and collaborations and debate ideas.
A core focus of IWSC5 will be bringing together end users of the science being presented, such as tourism managers, marine park managers and conservation groups. This will improve the uptake and application of research and help develop collaborations between research scientists and managers and industry.
For further information contact iwsc5@dbca.wa.gov.au. The webpage is under construction, please add to your favourites www.iwsc5.info

Extant Chondrichthyes:

Squalus clarkae sp. nov., a new dogfish shark from the Northwest Atlantic and Gulf of Mexico, with comments on the Squalus mitsukurii species complex. Zootaxa, 4444 (2): 101–119
New species: Squalus clarkae
Abstract: Sharks of the genus Squalus have slow reproductive rates coupled with low genetic diversity, as is typical of deep-water sharks, making this group slow to rebound from depletion due to overfishing. The number of species within Squalus has been expanding recently due to increased attention on taxonomic revision, and a growing research focus on little-known deep-water sharks in general. Here we use genetics and morphology to describe a new species of dogfish shark, Squalus clarkae sp. nov. from the Gulf of Mexico (GoM) which replaces Squalus mitsukurii in this region, and place it in the context of congeners from the Atlantic and elsewhere. Previously, S. clarkae sp. nov. was considered a part of the Squalus mitsukurii species complex, a group of closely related but distinct species. We sequenced the mitochondrial cytochrome oxidase I and the NADH Dehydrogenase II gene of S. mitsukurii from the type location in Japan, S. clarkae sp. nov. from the GoM, as well as three closely related species (S. cubensis, S. blainville, and S. megalops) and S. cf. mitsukurii from Brazil. Squalus clarkae sp. nov. is genetically distinct from other species with significant statistical support (>98.6% bootstrap support/posterior probability), and 2.8% divergent from S. mitsukurii in the type location of Japan. Morphological estimates also revealed differences between S. clarkae sp. nov., S. mitsukurii, and other Atlantic Squalus species, with S. clarkae sp. nov. exhibiting a longer body, smaller interorbital space, shorter caudal fin, and a differently-proportioned first dorsal fin. In general, dogfish sharks in the Atlantic and GoM are characterized by similar but distinct morphology, significant genetic variation, and small species ranges.

Extinct Chondrichthyes:
no news this month!

CRUZ-QUINTANA, Y. & CAÑA-BOZADA, V. & SUÁREZ-MORALES, E. & SANTANA-PIÑEROS, A.M. (2018): A new species of Pupulina van Beneden, 1892 (Copepoda, Siphonostomatoida, Caligidae) from Aetobatus cf. narinari (Pisces, Myliobatidae) from the Pacific coast of Ecuador. ZooKeys, 777: 1-16
New species: Pupulina mantensis
Abstract: A new caligid copepod species, Pupulina mantensis sp. n. is described based on female and male specimens collected from the gills of the myliobatid elasmobranch Aetobatus cf. narinari Euphrasen, 1790 captured off the Pacific coast of Ecuador. The new species has a unique combination of characters that diverges from its known congeners, including: (i) weakly developed posterolateral processes on the genital complex; (ii) large spines on posterior surface of maxilliped basis (iii) abdomen slender, unsegmented, approximately 1/2 length and 1/5 width of genital complex; (iv) third exopodal segment of leg II with single long naked spine adjacent to minute, naked lateral spine; (v) velum of leg II with adjacent patch of denticles; (vi) caudal rami slightly less than half the length of genital complex; (vii) post-antennal process with robust, posteriorly directed tine, sclerotized stump posterolaterally, and two multi-sensillate papillae located on or near base of process (viii) post-oral process oval. The overall prevalence of P. mantensis sp. n. on its host was 37.5% and its mean abundance was 1.87 specimens per host. This is the second record of the genus Pupulina from Ecuador and the second record of Pupulinainfecting rays of the Myliobatinae genus Aetobatus, of the subfamily Myliobatinae, after its discovery on A. ocellatus in Australia, thus confirming this expansion of its previously known host range to a new elasmobranch subfamily.

PLEASE send your new papers tojuergen.pollerspoeck@shark-references.comor nicolas.straube@shark-references.com   

Latest Research Articles

Extant Chondrichthyes:
ABRANTES, K.G. & BRUNNSCHWEILER, J.M. & BARNETT, A. (2018) You are what you eat: Examining the effects of provisioning tourism on shark diets. Biological Conservation, 224: 300-308   http://dx.doi.org/10.1016/j.biocon.2018.05.021
AMARAL, C.R.L. & PEREIRA, F. & SILVA, D.A. & AMORIM, A. & DECARVALHO, E.F. (2018) The mitogenomic phylogeny of the Elasmobranchii (Chondrichthyes). Mitochondrial DNA Part A, 29 (6): 867-878   http://dx.doi.org/10.1080/24701394.2017.1376052
ARAUJO, G. & ROHNER, C.A. & LABAJA, J. & CONALES, S.J. & SNOW, S.J. & MURRAY, R. & PIERCE, S.J. & PONZO, A. (2018) Satellite tracking of juvenile whale sharks in the Sulu and Bohol Seas, Philippines. PeerJ, 6: e5231   http://dx.doi.org/10.7717/peerj.5231
BARNES, A. & SUTARIA, D. & HARRY, A. & JABADO, R.W. (2018) Demographics and length and weight relationships of commercially important sharks along the north‐western coast of India. Marine and Freshwater Ecosystems, in press   http://dx.doi.org/10.1002/aqc.2940
BAYHAN, Y.K. & ERGUDEN, D. & CARTES, J.E. (2018) Deep Sea Fisheries in Mersin Bay, Turkey, Eastern Mediterranean: Diversity and Abundance of Shrimps and Benthic Fish Fauna. Acta Zoologica Bulgarica, 70 (2): 259-268 
CARDEÑOSA, D. & FIELDS, A.T. & BABCOCK, E.A. & ZHANG, H. & FELDHEIM, K. & SHEA, S.K.H. & FISCHER, G.A. & CHAPMAN, D.D. (2018) CITES‐listed sharks remain among the top species in the contemporary fin trade. Conservations Letters, in press   http://dx.doi.org/10.1111/conl.12457
COTRONEI, S. & POZO, K. & AUDY, O. & PRIBYLOVA, P. & CORSOLINI, S. (2018) Contamination Profile of DDTs in the Shark Somniosus microcephalus from Greenland Seawaters. Bulletin of Environmental Contamination and Toxicology, 101 (1): 7-13   http://dx.doi.org/10.1007/s00128-018-2371-z
COUTO, A. & QUEIROZ, N. & KETCHUM, J.T. & SAMPAIO, E. & FURTADO, M. & CID, A.A. & CASTRO, J. & ROSA, R. (2018) Smooth hammerhead sharks (Sphyrna zygaena) observed off the Portuguese southern coast. Environmental Biology of Fishes, 101 (8): 1261-1268   http://dx.doi.org/10.1007/s10641-018-0773-8
CURTIS, T.H. & METZGER, G. & FISCHER, C. & MCBRIDE, B. & MCCALLISTER, M. & WINN, L.J. & QUINLAN, J. & AJEMIAN, M.J. (2018) First insights into the movements of young-of-the-year white sharks (Carcharodon carcharias) in the western North Atlantic Ocean. Scientific Reports, 8: 10794   http://dx.doi.org/10.1038/s41598-018-29180-5
DALY, R. & SMALE, M.J. & SINGH, S. & ANDERS, D. & SHIVJI, M. & DALY, C.A.K. & LEA, J.S.E. & SOUSA, L.L. & WETHERBEE, B.M. & FITZPATRICK, R. & CLARKE, C.R. & SHEAVES, M. & BARNETT, A. (2018) Refuges and risks: Evaluating the benefits of an expanded MPA network for mobile apex predators. Diversity and Distributions, in press   http://dx.doi.org/10.1111/ddi.12758
DELACRUZ-TORRES, J. & GONZALEZ-ACOSTA, A.F. & MARTINEZ-PEREZ, J.A. (2018) Descripción y comparación de la línea lateral de tres especies de rayas eléctricas del género Narcine (Torpediniformes: Narcinidae) [Description and comparison of the lateral line of three species of electric rays of the genus Narcine (Torpediniformes: Narcinidae)]. Revista De Biologia Tropical, 66 (2): 586-592  
DICKEN, M.L. & WINKER, H. & SMALE, M.J. & CLIFF, G. (2018) Sharks caught in the KwaZulu-Natal bather protection programme, South Africa. 14. The smooth hammerhead shark Sphyrna zygaena (Linnaeus). African Journal of Marine Science, 40 (2): 157-174   http://dx.doi.org/10.2989/1814232x.2018.1470031
DUARTE, H.O. & DROGUET, E.L. & MOURA, M.C. (2018) Quantitative ecological risk assessment of Shortfin Mako Shark (Isurus oxyrinchus): Proposed model and application example. Applied Ecology and Environmental Research, 16 (3): 3691-3709   http://dx.doi.org/10.15666/aeer/1603_36913709
EHEMANN, N.R. & GONZÁLEZ-GONZÁLEZ, L.V. & CHOLLET-VILLALPANDO, J.G. & CRUZ-AGÜERO, J.D.L. (2018) Updated checklist of the extant Chondrichthyes within the Exclusive Economic Zone of Mexico. ZooKeys, 774: 17-39   http://dx.doi.org/10.3897/zookeys.774.25028
ELLIS, J.R. & BURT, G.J. & GRILLI, G. & MCCULLY PHILLIPS, S.R. & CATCHPOLE, T.L. & MAXWELL, D.L. (2018) At‐vessel mortality of skates (Rajidae) taken in coastal fisheries and evidence of longer‐term survival. Journal of Fish Biology, 92 (6): 1702–1719   http://dx.doi.org/10.1111/jfb.13597
ESTUPIÑÁN-MONTAÑO, C. & CEDEÑO-FIGUEROA, L. & ESTUPIÑÁN-ORTIZ, J.F. & GALVÁN-MAGAÑA, F. & SANDOVAL-LONDOÑO, A. & CASTAÑEDA-SUAREZ, D. & POLO-SILVA, C.J. (2018) Feeding habits and trophic level of the smooth hammerhead shark, Sphyrna zygaena (Carcharhiniformes: Sphyrnidae), off Ecuador. Journal of the Marine Biological Association of the United Kingdom, in press   http://dx.doi.org/10.1017/S0025315418000474
FERGUSON, K. (2018) Sharks fertilize coral reefs. Frontiers in Ecology and the Environment, 16 (4): 201-201 
FLAMMENSBECK, C.K. & POLLERSPÖCK, J. & SCHEDEL, F.D.B. & MATZKE, N.J. & STRAUBE, N. (2018) Of teeth and trees: A fossil tip‐dating approach to infer divergence times of extinct and extant squaliform sharks. Zoologica Scripta, in press   http://dx.doi.org/10.1111/zsc.12299
FUSS, T. & JOHN, L. & SCHLUESSEL, V. (2018) Same or different? Abstract relational concept use in juvenile bamboo sharks and Malawi cichlids. Current Zoology: zoy059   http://dx.doi.org/10.1093/cz/zoy059
GONZÁLEZ-PESTANA, A. & ACUÑA-PERALES, N. & CÓRDOVA, F. & COASACA, J. & ALFARO, E. & ALFARO-SHIGUETO, J. & MANGEL, J.C. (2018) Feeding habits of thresher sharks Alopias sp. in northern Peru: predators of Humboldt squid (Dosidicus gigas). Journal of the Marine Biological Association of the United Kingdom, in press   http://dx.doi.org/10.1017/S0025315418000504
GORE, M. & ABELS, L. & WASIK, S. & SADDLER, L. & ORMOND, R. (2018) Are close-following and breaching behaviours by basking sharks at aggregation sites related to courtship? Journal of the Marine Biological Association of the United Kingdom, in press   http://dx.doi.org/10.1017/S0025315418000383
HERSH, T.A. & DIMOND, A.L. & RUTH, B.A. & LUPICA, N.V. & BRUCE, J.C. & KELLEY, J.M. & KING, B.L. & LUTTON, B.V. (2018) A role for the CXCR4-CXCL12 axis in the little skate, Leucoraja erinacea. American Journal of Physiology-Regulatory, Integrative and Comparative Physiology, in press   http://dx.doi.org/10.1152/ajpregu.00322.2017
HUSSEY, N.E. & ORR, J. & FISK, A.T. & HEDGES, K.J. & FERGUSON, S.H. & BARKLEY, A.N. (2018) Mark report satellite tags (mrPATs) to detail large-scale horizontal movements of deep water species: First results for the Greenland shark (Somniosus microcephalus). Deep-Sea Research Part I-Oceanographic Research Papers, 134: 32-40   http://dx.doi.org/10.1016/j.dsr.2018.03.002
HYATT, M.W. & ANDERSON, P.A. & O'DONNELL, P.M. (2018) Influence of Temperature, Salinity, and Dissolved Oxygen on the Stress Response of Bull (Carcharhinus leucas) and Bonnethead (Sphyrna tiburo) Sharks after Capture and Handling. Journal of Coastal Research, 34 (4): 818-827   http://dx.doi.org/10.2112/jcoastres-d-17-00118.1
ISCI, E.T. & RITTER, E. (2018) On the complexity of shark bite wounds: From associated bacteria to trauma management and wound repair. Journal of Trauma and Acute Care Surger, in press   http://dx.doi.org/10.1097/TA.0000000000001920
JEW, M. & EBERT, D.A. & KEMPER, J.M. & WALOVICH, K. & QUARANTA, K.L. (2018) Redescription of the bigeye chimaera, Hydrolagus macrophthalmus de Buen, 1959 (Chondrichthyes: Chimaeriformes), with a genetic characterization of the species. Marine Biodiversity, in press   http://dx.doi.org/10.1007/s12526-018-0911-8
JINSON, S.T. & LIEBICH, J. & SENFT, S.L. & MATHGER, L.M. (2018) Retinal specializations and visual ecology in an animal with an extremely elaborate pupil shape: the little skate Leucoraja (Raja) erinacea Mitchell, 1825. Journal of Comparative Neurology, 526 (12): 1962-1977   http://dx.doi.org/10.1002/cne.24465
JUANES, F. (2018) On Sharks and Humanity, an Art Exhibit at the Hong Kong Maritime Museum. Fisheries, 43 (6): 266-267   http://dx.doi.org/10.1002/fsh.10078
LAURENT, S. & MARTINET, O. & CUQ, H. & RIND, A. & DURASNEL, P. & LENNE, C. & BLONDE, R. (2018) Whiptail Stingray Injury. Wilderness & Environmental Medicine, 29 (2): 243-247   http://dx.doi.org/10.1016/j.wem.2018.01.008
LI, Y.K. & GAO, X.D. & WANG, L.Y. & FANG, L. (2018) [Trophic niche partitioning of pelagic sharks in Central Eastern Pacific inferred from stable isotope analysis.] [in Chinese] Ying Yong Sheng Tai Xue Bao, 29 (1): 309-313   http://dx.doi.org/10.13287/j.1001-9332.201801.037
LLETENA-MARTILLO, Y. & PENAHERRERA-PALMA, C. & ESPINOZA, E.R. (2018) Fish assemblages in three fringed mangrove bays of Santa Cruz Island, Galapagos Marine Reserve. Revista De Biologia Tropical, 66 (2): 674-687  
LOZANO-BILBAO, E. & LOZANO, G. & GUTIERREZ, A.J. & RUBIO, C. & HARDISSON, A. (2018) Mercury, cadmium, and lead content in demersal sharks from the Macaronesian islands. Environmental Science and Pollution Research, 25 (21): 21251-21256   http://dx.doi.org/10.1007/s11356-018-2550-9
MARANDEL, F. & LORANCE, P. & ANDRELLO, M. & CHARRIER, G. & LE CAM, S. & LEHUTA, S. & TRENKEL, V.M. (2018) Insights from genetic and demographic connectivity for the management of rays and skates. Canadian Journal of Fisheries and Aquatic Sciences, 75 (8): 1291-1302   http://dx.doi.org/10.1139/cjfas-2017-0291
MOJETTA, A.R. & TRAVAGLINI, A. & SCACCO, U. & BOTTARO, M. (2018) Where sharks met humans: The Mediterranean Sea, history and myth of an ancient interaction between two dominant predators. Regional Studies in Marine Science, 21: 30-38   http://dx.doi.org/10.1016/j.rsma.2017.10.001
MURAWSKI, S.A. & PEEBLES, E.B. & GRACIA, A. & TUNNELL, J.W. & ARMENTEROS, M. (2018) Comparative Abundance, Species Composition, and Demographics of Continental Shelf Fish Assemblages throughout the Gulf of Mexico. Marine and Coastal Fisheries, 10 (3): 325-346   http://dx.doi.org/10.1002/mcf2.10033
MUSYL, M.K. & GILMAN, E.L. (2018) Post-release fishing mortality of blue (Prionace glauca) and silky shark (Carcharhinus falciformes) from a Palauan-based commercial longline fishery Reviews in Fish Biology and Fisheries, 28 (3): 567–586   http://dx.doi.org/10.1007/s11160-018-9517-2
MYATT, T. & NGUYEN, B.J. & CLARK, R.F. & COFFEY, C.H. & O'CONNELL, C.W. (2018) A Prospective Study of Stingray Injury and Envenomation Outcomes. Journal of Emergency Medicine, 55 (2): 213-217   http://dx.doi.org/10.1016/j.jemermed.2018.04.035
OTT, J.A. & CASTRO, C.D. & DEISS, T.C. & OHTA, Y. & FLAJNIK, M.F. & CRISCITIELLO, M.F. (2018) Somatic hypermutation of T cell receptor α chain contributes to selection in nurse shark thymus. eLife, 7: e28477   http://dx.doi.org/10.7554/eLife.28477
PAPASTAMATIOU, Y.P. & WATANABE, Y.Y. & DEMSAR, U. & LEOS-BARAJAS, V. & BRADLEY, D. & LANGROCK, R. & WENG, K. & LOWE, C.G. & FRIEDLANDER, A.M. & CASELLE, J.E. (2018) Activity seascapes highlight central place foraging strategies in marine predators that never stop swimming. Movement Ecology, 6: 9   http://dx.doi.org/10.1186/s40462-018-0127-3
PERRY, C.T. & FIGUEIREDO, J. & VAUDO, J.J. & HANCOCK, J. & REES, R. & SHIVJI, M. (2018) Comparing length-measurement methods and estimating growth parameters of free-swimming whale sharks (Rhincodon typus) near the South Ari Atoll, Maldives. Marine and Freshwater Research, in press   http://dx.doi.org/10.1071/MF17393
PFLEGER, M.O. & GRUBBS, R.D. & COTTON, C.F. & DALY-ENGEL, T.S. (2018) Squalus clarkae sp. nov., a new dogfish shark from the Northwest Atlantic and Gulf of Mexico, with comments on the Squalus mitsukurii species complex. Zootaxa, 4444 (2): 101–119   http://dx.doi.org/10.11646/zootaxa.4444.2.1
POPP, A.I. & BASSO, A.P. & LODOVICHI, M.V. & SIDORKEWICJ, N.S. (2018) Conservation of Body Sections and Organs of the Narrownose Smooth-hound, Mustelus schmitti (Pisces, Chondrichthyes), by Silicone Injection at Room Temperature to be Used in Comparative Anatomy learning. International Journal of Morphology, 36 (2): 413-418   http://dx.doi.org/10.4067/s0717-95022018000200413
PROHASKA, B.K. & BETHEA, D.M. & POULAKIS, G.R. & SCHARER, R.M. & KNOTEK, R. & CARLSON, J.K. & GRUBBS, R.D. (2018) Physiological stress in the smalltooth sawfish: effects of ontogeny, capture method, and habitat quality. Endangered Species Research, 36): 121-135   http://dx.doi.org/10.3354/esr00892
PROHASKA, B.K. & TSANG, P.C.W. & DRIGGERS, W.B. & HOFFMAYER, E.R. & WHEELER, C.R. & SULIKOWSKI, J.A. (2018) Effects of delayed phlebotomy on plasma steroid hormone concentrations in two elasmobranch species. Journal of Applied Ichthyology, 34 (4): 861-866   http://dx.doi.org/10.1111/jai.13700
RODRIGUEZ-ROMERO, J. & SIMEÓN-DE LA CRUZ, A. & OCHOA-DÍAZ, M.R. & MONSALVO-SPENCER, P.  (2018) New report of malformations in blue shark embryos (Prionace glauca) from the western coast of Baja California Sur, Mexico. Journal of the Marine Biological Association of the United Kingdom, in press   http://dx.doi.org/10.1017/S0025315418000127
SAMPAIO, C.L.S. & LEITE, L. & REIS, J.A. & LOIOLA, M. & MIRANDA, R.J. & NUNES, J.D.C. & MACENA, B.C.L. (2018) New insights into whale shark Rhincodon typus diet in Brazil: an observation of ram filter-feeding on crab larvae and analysis of stomach contents from the first stranding in Bahia state. Environmental Biology of Fishes, 101 (8): 1285-1293   http://dx.doi.org/10.1007/s10641-018-0775-6
SERRANO-FLORES, F. & PÉREZ-JIMÉNEZ, J.C. & MÉNDEZ-LOEZA, I. & BASSOS-HULL, K. & AJEMIAN, M.J. (2018) Comparison between the feeding habits of spotted eagle ray (Aetobatus narinari) and their potential prey in the southern Gulf of Mexico. Journal of the Marine Biological Association of the United Kingdom, in press   http://dx.doi.org/10.1017/S0025315418000450
SMITH, L.E. (2018) Plastic ingestion by Scyliorhinus canicula trawl captured in the North Sea. Marine Pollution Bulletin, 130: 6-7   http://dx.doi.org/10.1016/j.marpolbul.2018.03.001
SOTO-LOPEZ, K. & OCHOA-BAEZ, R.I. & TOVAR-AVILA, J. & GALVAN-MAGANA, F. (2018) Reproductive biology of the brown smooth-hound shark, Mustelus henlei (Chondrichthyes: Triakidae), off northwestern Mexico based on macroscopic and histological analyses. Ciencias Marinas, 44 (2): 125-139   http://dx.doi.org/10.7773/cm.v44i2.2805
TOMITA, T. & TODA, M. & MIYAMOTO, K. & UEDA, K. & NAKAYA, K. (2018) Morphology of a hidden tube: Resin injection and CT scanning reveal the three-dimensional structure of the spiracle in the Japanese bullhead shark Heterodontus japonicus (Chondrichthyes; Heterodontiformes; Heterodontidae). Anatomical Record, in press   http://dx.doi.org/10.1002/ar.23836
TOMITA, T. & TOUMA, H. & MURAKUMO, K. & YANAGISAWA, M. & YANO, N. & OKA, S.-I. & MIYAMOTO, K. & HANAHARA, N. & SATO, K. (2018) Captive Birth of Tiger Shark (Galeocerdo cuvier) Reveals a Shift in Respiratory Mode during Parturition. Copeia, 106 (2): 292-296   http://dx.doi.org/10.1643/CI-17-683
VIANNA, G.M.S. & MEEKAN, M.G. & ROGERS, A.A. & KRAGT, M.E. & ALIN, J.M. & ZIMMERHACKEL, J.S. (2018) Shark-diving tourism as a financing mechanism for shark conservation strategies in Malaysia. Marine Policy, 94: 220-226   http://dx.doi.org/10.1016/j.marpol.2018.05.008
WEHITT, A. & COLONELLO, J.H. & MACCHI, G.J. & GALINDEZ, E.J. (2018) Reproductive biology of the eyespot skate Atlantoraja cyclophora (Elasmobranchii: Arhynchobatidae) an endemic species of the Southwestern Atlantic Ocean (34 degrees S-42 degrees S). Neotropical Ichthyology, 16 (2): e170098   http://dx.doi.org/10.1590/1982-0224-20170098
WIECASZEK, B. & SOBECKA, E. & PANICZ, R. & KESZKA, S. & GORECKA, K. & LINOWSKA, A. (2018) First record of the deep-water shark Etmopterus spinax (Chondrichthyes: Etmopteridae) from the southern Baltic Sea (Pomeranian Bay). Oceanologia, 60 (3): 426-430   http://dx.doi.org/10.1016/j.oceano.2018.02.001
Extinct Chondrichthyes:
BAZZI, M. & KEAR, B.K. & BLOM, H. & AHLBERG, P.E. & CAMPIONE, N.E. (2018) Static Dental Disparity and Morphological Turnover in Sharks across the End-Cretaceous Mass Extinction. Current Biology, 28: 1–9   http://dx.doi.org/10.1016/j.cub.2018.05.093
BRATVOLD, J. & DELSETT, L.L. & HURUM, J.H. (2018) Chondrichthyans from the Grippia bonebed (Early Triassic) of Marmierfjellet, Spitsbergen. Norwegian Journal of Geology, in press 
BRONSON, A.W. & MAISEY, J.G. (2018) Resolving the identity of Platylithophycus, an enigmatic fossil from the Niobrara Chalk (Upper Cretaceous, Coniacian-Campanian). Journal of Paleontology, 92 (4): 743-750   http://dx.doi.org/10.1017/jpa.2018.14
CARRILLO-BRICEÑO, J.D. & CARRILLO, J.D. & AGUILERA, O.A. & SANCHEZ-VILLAGRA, M.R. (2018) Shark and ray diversity in the Tropical America (Neotropics)—an examination of environmental and historical factors affecting diversity. PeerJ, 6: e5313   http://dx.doi.org/10.7717/peerj.5313
FLAMMENSBECK, C.K. & POLLERSPÖCK, J. & SCHEDEL, F.D.B. & MATZKE, N.J. & STRAUBE, N. (2018) Of teeth and trees: A fossil tip‐dating approach to infer divergence times of extinct and extant squaliform sharks. Zoologica Scripta, in press   http://dx.doi.org/10.1111/zsc.12299
MAISCH, H.M. & BECKER, M.A. & CHAMBERLAIN, J.A. (2018) Lamniform and Carcharhiniform Sharks from the Pungo River and Yorktown Formations (Miocene–Pliocene) of the Submerged Continental Shelf, Onslow Bay, North Carolina, USA. Copeia, 106 (2): 353-374   http://dx.doi.org/10.1643/OT-18-016
SCHWANDT, H. (2018) Erstfund eines Haizahns der Gattung Physogaleus im Turritellengestein (Geschiebe) von Westmecklenburg. Steinkern, 34: 60-61 
ZOUHRI, S. & GINGERICH, P. &  ADNET, S. & BOURDON, E. & JOUVE, S. & KHALLOUFI, B. & AMANE, A. & ELBOUDALI, N. & RAGE, J.-C. & DE LAPPARENT DE BROIN, F. & KAOUKAYA, A. & SEBTIA, S. (2018) Middle Eocene vertebrates from the sabkha of Gueran, Atlantic coastal basin, Saharan Morocco, and their peri-African correlations. Comptes Rendus Geoscience, in press http://dx.doi.org/10.1016/j.crte.2018.06.006

CRUZ-QUINTANA, Y. & CAÑA-BOZADA, V. & SUÁREZ-MORALES, E. & SANTANA-PIÑEROS, A.M.  (2018) A new species of Pupulina van Beneden, 1892 (Copepoda, Siphonostomatoida, Caligidae) from Aetobatus cf. narinari (Pisces, Myliobatidae) from the Pacific coast of Ecuador. ZooKeys, 777: 1-16   http://dx.doi.org/10.3897/zookeys.777.26017
OZAK, A.A. & YANAR, A. & SAKARYA, Y. & BOXSHALL, G.A. (2018) The discovery of Lepeophtheirus acutus Heegaard, 1943 (Copepoda: Caligidae) from two new elasmobranch hosts in the Mediterranean Sea, and a comparative redescription of Lepeophtheirus rhinobati Luque, Chaves et Cezar, 1998. Acta Parasitologica, 63 (3): 454-473   http://dx.doi.org/10.1515/ap-2018-0055


Video "Rescue of an angular rough shark"


Novel approach studies whale shark ages the best way -- while they are swimming

New study reveals world's largest fish is larger and lives longer than previously thought

Date: July 18, 2018
Source: Nova Southeastern University
Summary: A new study of whale sharks, using a novel approach to gathering data, shows these endangered animals can live longer and grow larger than previously believed.
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Where baby white sharks 'hang out' in the North Atlantic

Date: July 18, 2018
Source: Florida Atlantic University
Summary: A team of scientists is the first to confirm the movement patterns and seasonal migrations of baby white sharks in the north Atlantic Ocean. They put the New York Bight shark nursery theory to test by deploying satellite and acoustic tags on 10 baby white sharks (less than 1 year old) off Long Island's coast. Results provide novel insights into the distribution of this vulnerable early stage of life that complements recent work on larger white sharks.

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Satellite tracking reveals Philippine waters are important for endangered whale sharks

Date: July 24, 2018
Source: PeerJ
Summary: A new scientific study has tracked juvenile whale sharks across the Philippines emphasizing the importance of the archipelago for the species. The study is the most complete tracking study of whale sharks in the country, with satellite tags deployed on different individuals in multiple sites.

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Researchers demonstrate shark vertebral band pairs are related to growth, not time

Previous methods underestimate shark ages

Date: July 30, 2018
Source: NOAA Northeast Fisheries Science Center
Summary: Band pairs in shark vertebrae have been used for decades to estimate shark age, of practical use in conserving overfished sharks and managing the remaining shark fisheries. However, recent research demonstrates that previous methods used to determine the age of sharks have underestimated those ages, particularly in older sharks.

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The end-Cretaceous extinction unleashed modern shark diversity

Date: August 2, 2018
Source: Uppsala University
Summary: A study that examined the shape of hundreds of fossilized shark teeth suggests that modern shark biodiversity was triggered by the end-Cretaceous mass extinction event, about 66 million years ago.

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