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[PMID]:28727800
[Au] Autor:Saunders WB; Greenfest-Allen E; Ward PD
[Ad] Endereço:Department of Geology, Bryn Mawr College, Bryn Mawr, Pennsylvania, United States of America.
[Ti] Título:Demographic disequilibrium in living nautiloids (Nautilus and Allonautilus): Canary in the coal mines?
[So] Source:PLoS One;12(7):e0179811, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Averaged demographic data from previously unfished populations of Nautilus and Allonautilus (Cephalopoda) provide a baseline to determine if a population is undisturbed and in "equilibrium" or is in "disequilibrium" as a result of fishery pressure. Data are available for previously undisturbed local nautiloid populations in Papua New Guinea, Australia, Indonesia, Fiji, Palau, American Samoa, New Caledonia and Vanuatu (total n = 2,669 live-caught, tagged and released animals). The data show that unfished populations average ~75% males and ~74% mature animals. By contrast, unpublished, anecdotal and historical records since 1900 from the heavily fished central Philippines have shown a persistent decline in trap yields and a change in demographics of N. pompilius. By 1979, a sample of fished live-caught animals (n = 353) comprised only ~28% males and ~27% mature animals. Continued uncontrolled trapping caused collapse of the fishery and the shell industry has moved elsewhere, including Indonesia. In addition, we show that estimated rates of population decline are offered by unpublished tag-release records in unfished Palau. These data show that patterns of trap yields and demographic differences between fished and unfished populations in relative age class and sex ratios can indicate disequilibria wrought by fisheries pressure that can render local populations inviable. Given adequate samples (n ≥100 live-caught animals), a threshold of <50% males and mature animals in fished populations should signal the need to initiate curative conservation initiatives. The current trajectory of uncontrolled nautiloid fisheries can only mean trouble and possibly extinction of local populations of this ancient, iconic molluscan lineage.
[Mh] Termos MeSH primário: Cefalópodes
Conservação dos Recursos Naturais
Pesqueiros
[Mh] Termos MeSH secundário: Distribuição Animal
Animais
Austrália
Feminino
Masculino
Nautilus
Ilhas do Pacífico
Dinâmica Populacional
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170927
[Lr] Data última revisão:
170927
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170721
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0179811


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[PMID]:27457541
[Au] Autor:Langley MC; O'Connor S; Piotto E
[Ad] Endereço:Archaeology & Natural History, School of Culture, History & Language, College of Asia and the Pacific, Australian National University, Australia. Electronic address: michelle.langley@anu.edu.au.
[Ti] Título:42,000-year-old worked and pigment-stained Nautilus shell from Jerimalai (Timor-Leste): Evidence for an early coastal adaptation in ISEA.
[So] Source:J Hum Evol;97:1-16, 2016 Aug.
[Is] ISSN:1095-8606
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:In this paper, we describe worked and pigment-stained Nautilus shell artefacts recovered from Jerimalai, Timor-Leste. Two of these artefacts come from contexts dating to between 38,000 and 42,000 cal. BP (calibrated years before present), and exhibit manufacturing traces (drilling, pressure flaking, grinding), as well as red colourant staining. Through describing more complete Nautilus shell ornaments from younger levels from this same site (>15,900, 9500, and 5000 cal. BP), we demonstrate that those dating to the initial occupation period of Jerimalai are of anthropogenic origin. The identification of such early shell working examples of pelagic shell in Island Southeast Asia not only adds to our growing understanding of the importance of marine resources to the earliest modern human communities in this region, but also indicates that a remarkably enduring shell working tradition was enacted in this area of the globe. Additionally, these artefacts provide the first material culture evidence that the inhabitants of Jerimalai were not only exploiting coastal resources for their nutritional requirements, but also incorporating these materials into their social technologies, and by extension, their social systems. In other words, we argue that the people of Jerimalai were already practicing a developed coastal adaptation by at least 42,000 cal. BP.
[Mh] Termos MeSH primário: Arqueologia
Nautilus
[Mh] Termos MeSH secundário: Animais
Fósseis
Seres Humanos
Tecnologia
Timor-Leste
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170921
[Lr] Data última revisão:
170921
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160727
[St] Status:MEDLINE


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[PMID]:27100183
[Au] Autor:Linzmeier BJ; Kozdon R; Peters SE; Valley JW
[Ad] Endereço:Department of Geoscience, University of Wisconsin-Madison, Madison, Wisconsin, United States of America.
[Ti] Título:Oxygen Isotope Variability within Nautilus Shell Growth Bands.
[So] Source:PLoS One;11(4):e0153890, 2016.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Nautilus is often used as an analogue for the ecology and behavior of extinct externally shelled cephalopods. Nautilus shell grows quickly, has internal growth banding, and is widely believed to precipitate aragonite in oxygen isotope equilibrium with seawater. Pieces of shell from a wild-caught Nautilus macromphalus from New Caledonia and from a Nautilus belauensis reared in an aquarium were cast in epoxy, polished, and then imaged. Growth bands were visible in the outer prismatic layer of both shells. The thicknesses of the bands are consistent with previously reported daily growth rates measured in aquarium reared individuals. In situ analysis of oxygen isotope ratios using secondary ion mass spectrometry (SIMS) with 10 µm beam-spot size reveals inter- and intra-band δ18O variation. In the wild-caught sample, a traverse crosscutting 45 growth bands yielded δ18O values ranging 2.5‰, from +0.9 to -1.6 ‰ (VPDB), a range that is larger than that observed in many serial sampling of entire shells by conventional methods. The maximum range within a single band (~32 µm) was 1.5‰, and 27 out of 41 bands had a range larger than instrumental precision (±2 SD = 0.6‰). The results from the wild individual suggest depth migration is recorded by the shell, but are not consistent with a simple sinusoidal, diurnal depth change pattern. To create the observed range of δ18O, however, this Nautilus must have traversed a temperature gradient of at least ~12°C, corresponding to approximately 400 m depth change. Isotopic variation was also measured in the aquarium-reared sample, but the pattern within and between bands likely reflects evaporative enrichment arising from a weekly cycle of refill and replacement of the aquarium water. Overall, this work suggests that depth migration behavior in ancient nektonic mollusks could be elucidated by SIMS analysis across individual growth bands.
[Mh] Termos MeSH primário: Exoesqueleto/química
Exoesqueleto/crescimento & desenvolvimento
Nautilus/crescimento & desenvolvimento
Isótopos de Oxigênio/química
Oxigênio/química
[Mh] Termos MeSH secundário: Animais
Espectrometria de Massas
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T; RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.
[Nm] Nome de substância:
0 (Oxygen Isotopes); S88TT14065 (Oxygen)
[Em] Mês de entrada:1609
[Cu] Atualização por classe:170220
[Lr] Data última revisão:
170220
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160422
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0153890


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[PMID]:26249392
[Au] Autor:Nikolaeva SV
[Ad] Endereço:International Commission on Zoological Nomenclature, Natural History Museum (NHM), London SW7 5BD, U.K. Borissiak Paleontological Institute, Russian Academy of Sciences, ul. Profsoyuznaya 123, Moscow, 117997 Russia; Kazan Federal University, ul. Kremlyovskaya 4/5, Kazan, 420008 Russia; Email: s.nikolaeva@nhm.ac.uk.
[Ti] Título:A study of the type series of Nautilus pompilius Linnaeus, 1758 (Mollusca, Cephalopoda, Nautilida).
[So] Source:Zootaxa;3963(1):55-73, 2015 May 25.
[Is] ISSN:1175-5334
[Cp] País de publicação:New Zealand
[La] Idioma:eng
[Ab] Resumo:Few animals are treasured by zoologists more than Nautilus, and Nautilus pompilius Linnaeus, 1758, the type species of the genus, in particular. However, the type series of this species has not been studied in great detail. According to the rules of zoological nomenclature the type series consists of all the specimens included by the author in the new nominal taxon at the time of description (whether directly or by bibliographic reference), and any evidence, published or unpublished, may be taken into account to determine what specimens are included. The type series of Nautilus pompilius includes specimens in the Linnean Society of London, the University Museum in Uppsala, and specimens figured by pre-Linnaean authors indicated by reference by Linnaeus (1758). One specimen in London and four specimens in Uppsala, which are still extant, are likely to have been known to Linnaeus at the time when he prepared the 10th Edition of Systema Naturae (Linnaeus 1758), although none of these specimens was specifically mentioned by him. Even though it is widely believed that Linnaeus (1767) designated as lectotype a specimen figured by Rumphius (1705) in his D'Amboinsche Rariteitkamer, referred to in the Systema Naturae, this presumed lectotypification is not valid because Linnaeus did not explicitly indicate that any particular specimen was considered to be the type of the species. Later lectotype designations of Rumphius' illustrations are invalid because they show three different specimens. It seems that the best approach, given the quality of the material and the lack of clarity as to its type status, would be to apply to the ICZN asking to set aside all previous type fixations and designate a neotype, preferably a DNA sequenced specimen of known provenance.
[Mh] Termos MeSH primário: Nautilus/classificação
[Mh] Termos MeSH secundário: Estruturas Animais/anatomia & histologia
Estruturas Animais/crescimento & desenvolvimento
Animais
Tamanho Corporal
Livros/história
História do Século XVII
História do Século XVIII
História do Século XIX
História do Século XX
Museus/história
Nautilus/anatomia & histologia
Nautilus/crescimento & desenvolvimento
Tamanho do Órgão
Zoologia/história
[Pt] Tipo de publicação:HISTORICAL ARTICLE; JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1612
[Cu] Atualização por classe:161230
[Lr] Data última revisão:
161230
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150808
[St] Status:MEDLINE
[do] DOI:10.11646/zootaxa.3963.1.4


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[PMID]:26033519
[Au] Autor:Williams RC; Jackson BC; Duvaux L; Dawson DA; Burke T; Sinclair W
[Ad] Endereço:Centre for Wildlife Conservation, University of Cumbria, Ambleside, LA22 9BJ, UK.
[Ti] Título:The genetic structure of Nautilus pompilius populations surrounding Australia and the Philippines.
[So] Source:Mol Ecol;24(13):3316-28, 2015 Jul.
[Is] ISSN:1365-294X
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Understanding the distribution of genetic diversity in exploited species is fundamental to successful conservation. Genetic structure and the degree of gene flow among populations must be assessed to design appropriate strategies to prevent the loss of distinct populations. The cephalopod Nautilus pompilius is fished unsustainably in the Philippines for the ornamental shell trade and has limited legislative protection, despite the species' recent dramatic decline in the region. Here, we use 14 microsatellite markers to evaluate the population structure of N. pompilius around Australia and the Philippines. Despite their relative geographical proximity, Great Barrier Reef individuals are genetically isolated from Osprey Reef and Shark Reef in the Coral Sea (FST  = 0.312, 0.229, respectively). Conversely, despite the larger geographical distances between the Philippines and west Australian reefs, samples display a small degree of genetic structure (FST  = 0.015). Demographic scenarios modelled using approximate Bayesian computation analysis indicate that this limited divergence is not due to contemporary gene flow between the Philippines and west Australia. Instead, present-day genetic similarity can be explained by very limited genetic drift that has occurred due to large average effective population sizes that persisted at both locations following their separation. The lack of connectivity among populations suggests that immigrants from west Australia would not facilitate natural recolonization if Philippine populations were fished to extinction. These data help to rectify the paucity of information on the species' biology currently inhibiting their conservation classification. Understanding population structure can allow us to facilitate sustainable harvesting, thereby preserving the diversity of genetically distinct stocks.
[Mh] Termos MeSH primário: Genética Populacional
Nautilus/genética
[Mh] Termos MeSH secundário: Animais
Austrália
Teorema de Bayes
Conservação dos Recursos Naturais
Recifes de Corais
Fluxo Gênico
Deriva Genética
Genótipo
Repetições de Microssatélites
Modelos Genéticos
Dados de Sequência Molecular
Filipinas
Densidade Demográfica
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1509
[Cu] Atualização por classe:150626
[Lr] Data última revisão:
150626
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150603
[St] Status:MEDLINE
[do] DOI:10.1111/mec.13255


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[PMID]:25894584
[Au] Autor:Seuss B; Wisshak M; Mapes RH; Landman NH
[Ad] Endereço:Friedrich-Alexander Universität Erlangen-Nürnberg, GeoZentrum Nordbayern-Paläoumwelt, Loewenichstraße 28, 91054 Erlangen, Germany.
[Ti] Título:Syn-vivo bioerosion of Nautilus by endo- and epilithic foraminiferans (New Caledonia and Vanuatu).
[So] Source:PLoS One;10(4):e0125558, 2015.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:A variety of syn-vivo bioerosion traces produced by foraminiferans is recorded in shells of Nautilus sampled near New Caledonia and Vanuatu. These are two types of attachment scars of epilithic foraminiferans and two forms of previously undescribed microborings, a spiral-shaped and a dendritic one, both most likely being the work of endolithic 'naked' foraminiferans. Scanning electron microscopy of epoxy-resin casts of the latter revealed that these traces occur in clusters of up to many dozen individuals and potentially are substrate-specific. The foraminiferan traces are the sole signs of bioerosion in the studied Nautilus conchs, and neither traces of phototrophic nor other chemotrophic microendoliths were found. While the complete absence of photoautotrophic endoliths would be in good accordance with the life habit of Nautilus, which resides in aphotic deep marine environments and seeks shallower waters in the photic zone for feeding only during night-time, the absence of any microbial bioerosion may also be explained by an effective defence provided by the nautilid periostracum. Following this line of reasoning, the recorded foraminiferan bioerosion traces in turn would identify their trace makers as being specialized in their ability to penetrate the periostracum barrier and to bioerode the shell of modern Nautilus.
[Mh] Termos MeSH primário: Fenômenos Ecológicos e Ambientais
Foraminíferos/fisiologia
Nautilus/parasitologia
[Mh] Termos MeSH secundário: Exoesqueleto/parasitologia
Animais
Nova Caledônia
Vanuatu
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1604
[Cu] Atualização por classe:161125
[Lr] Data última revisão:
161125
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150421
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0125558


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[PMID]:25470257
[Au] Autor:Landman NH; Mapes RH; Cochran JK; Lignier V; Hembree DI; Goiran C; Folcher E; Brunet P
[Ad] Endereço:Division of Paleontology (Invertebrates), American Museum of Natural History, New York, New York 10024, United States of America.
[Ti] Título:An unusual occurrence of Nautilus macromphalus in a cenote in the Loyalty Islands (New Caledonia).
[So] Source:PLoS One;9(12):e113372, 2014.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Exploration of a landlocked cenote on Lifou (Loyalty Islands) revealed 37 shells of the cephalopod Nautilus macromphalus Sowerby, 1849, in saltwater on the cenote floor, approximately 40 m below the water surface. The occurrence of these shells is unusual because N. macromphalus is restricted to the open marine waters surrounding the island. All of the shells are mature, and nearly all of them are unbroken, with faded red-brown color stripes. We analyzed seven shells to determine their age. Radiocarbon dating yielded ages of 6380±30 to 7095±30 y BP. The 238U-series radionuclides 210Pb (half-life  = 22.3 y) and 226Ra (half-life  = 1600 y) also were measured. Two of the samples showed radioactive equilibrium between the nuclides, consistent with the old radiocarbon dates, but the other five samples showed excess 210Pb. When corrected for radioactive decay, the 226Ra activities were much greater than those found in living Nautilus. We conclude that exposure to high activities of 222Rn and 226Ra in the salty groundwater of the cenote altered the activities originally incorporated into the shells. Human placement of the shells in the cavity is rejected based on their radiocarbon age and the geometry of the cenote. The most probable explanation is that the animals entered the flooded karstic system through a connection on the seaward side at approximately 7,000 y BP, during an interval of slowly rising sea level. Unable to find an exit and/or due to anoxic bottom waters, the animals were trapped and died inside. The open connection with the sea persisted for ∼700 y, but after ∼6400 y BP, the connection was lost, probably due to a roof collapse. This is a rare example of Nautilus in a karstic coastal basin and provides a minimum age for the appearance of N. macromphalus in the Loyalty Islands.
[Mh] Termos MeSH primário: Nautilus/anatomia & histologia
Nautilus/fisiologia
[Mh] Termos MeSH secundário: Exoesqueleto/fisiologia
Animais
Cronologia como Assunto
Seres Humanos
Nova Caledônia
Datação Radiométrica
Rádio (Elemento)/análise
Urânio/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
4OC371KSTK (Uranium); W90AYD6R3Q (Radium)
[Em] Mês de entrada:1507
[Cu] Atualização por classe:141215
[Lr] Data última revisão:
141215
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:141204
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0113372


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[PMID]:24956107
[Au] Autor:Barord GJ; Dooley F; Dunstan A; Ilano A; Keister KN; Neumeister H; Preuss T; Schoepfer S; Ward PD
[Ad] Endereço:Department of Biology, Graduate Center, City University of New York, New York, New York, United States of America; Department of Biology, Brooklyn College, City University of New York, Brooklyn, New York, United States of America.
[Ti] Título:Comparative population assessments of Nautilus sp. in the Philippines, Australia, Fiji, and American Samoa using baited remote underwater video systems.
[So] Source:PLoS One;9(6):e100799, 2014.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The extant species of Nautilus and Allonautilus (Cephalopoda) inhabit fore-reef slope environments across a large geographic area of the tropical western Pacific and eastern Indian Oceans. While many aspects of their biology and behavior are now well-documented, uncertainties concerning their current populations and ecological role in the deeper, fore-reef slope environments remain. Given the historical to current day presence of nautilus fisheries at various locales across the Pacific and Indian Oceans, a comparative assessment of the current state of nautilus populations is critical to determine whether conservation measures are warranted. We used baited remote underwater video systems (BRUVS) to make quantitative photographic records as a means of estimating population abundance of Nautilus sp. at sites in the Philippine Islands, American Samoa, Fiji, and along an approximately 125 km transect on the fore reef slope of the Great Barrier Reef from east of Cairns to east of Lizard Island, Australia. Each site was selected based on its geography, historical abundance, and the presence (Philippines) or absence (other sites) of Nautilus fisheries The results from these observations indicate that there are significantly fewer nautiluses observable with this method in the Philippine Islands site. While there may be multiple possibilities for this difference, the most parsimonious is that the Philippine Islands population has been reduced due to fishing. When compared to historical trap records from the same site the data suggest there have been far more nautiluses at this site in the past. The BRUVS proved to be a valuable tool to measure Nautilus abundance in the deep sea (300-400 m) while reducing our overall footprint on the environment.
[Mh] Termos MeSH primário: Nautilus/crescimento & desenvolvimento
Tecnologia de Sensoriamento Remoto/métodos
Gravação em Vídeo
Água
[Mh] Termos MeSH secundário: Samoa Americana
Animais
Austrália
Recifes de Corais
Fiji
Filipinas
Fotografia
Dinâmica Populacional
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T; RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.
[Nm] Nome de substância:
059QF0KO0R (Water)
[Em] Mês de entrada:1510
[Cu] Atualização por classe:170220
[Lr] Data última revisão:
170220
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:140624
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0100799


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[PMID]:24840736
[Au] Autor:Ward P; Chamberlain J; Chamberlain R; Barord G; Ilano A; Catlin E
[Ad] Endereço:Sprigg Institute of Geobiology, University of Adelaide, Adelaide SA 5005, Australia.
[Ti] Título:Function of calcium phosphate renal concrements in extant Nautilus: a paradigm for Cambrian-relict short-term mineral reserve equivalent to vertebrate bone.
[So] Source:Zoology (Jena);117(3):185-91, 2014 Jun.
[Is] ISSN:1873-2720
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:Renal uroliths (concrements) of calcium phosphate have long been known to exist in both growing and mature (non-growing) Nautilus specimens, but to date no evidence-based explanation for their existence has been available. The currently favored speculation is that they function as a calcium reserve for shell and septal calcification. Here we present new observational and experimental data that are consistent with the hypothesis that they serve as a mineral/ion reserve, allowing short-term (<1 day) addition of ionized calcium and phosphorus to blood and other body fluids, in a way analogous to that of vertebrate bone. In both in-ocean experiments and during long-term observation of captive nautiluses, concrements disappear during two different, energy-intensive activities involving removal of anions and cations from newly secreted cameral liquid in the chamber formation cycle, and during dives to depths requiring high osmotic pressures within the canaliculi of the siphuncular epithelium to keep previously emptied chambers from flooding due to suddenly increased ambient hydrostatic pressure. New concrements reappear at other points in the chamber formation cycle and when normal living depth is restored. The use of concrements as an ion reserve and the Cambrian ancestry of nautiloids indicate that Nautilus may exemplify a solution to the problem of energy supply in newly evolved swimmers of the Cambrian radiation independent of that seen in fish.
[Mh] Termos MeSH primário: Fosfatos de Cálcio/análise
Fosfatos de Cálcio/metabolismo
Minerais/metabolismo
Nautilus/fisiologia
[Mh] Termos MeSH secundário: Animais
Osso e Ossos/metabolismo
Calcificação Fisiológica
Nautilus/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T; RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.
[Nm] Nome de substância:
0 (Calcium Phosphates); 0 (Minerals); 97Z1WI3NDX (calcium phosphate)
[Em] Mês de entrada:1410
[Cu] Atualização por classe:140602
[Lr] Data última revisão:
140602
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:140521
[St] Status:MEDLINE


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[PMID]:24797217
[Au] Autor:Moini M; O'Halloran A; Peters AM; France CA; Vicenzi EP; DeWitt TG; Langan E; Walsh T; Speakman RJ
[Ad] Endereço:George Washington University, Department of Forensic Sciences, Washington, District of Columbia.
[Ti] Título:Understanding irregular shell formation of Nautilus in aquaria: chemical composition and structural analysis.
[So] Source:Zoo Biol;33(4):285-94, 2014 Jul-Aug.
[Is] ISSN:1098-2361
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Irregular shell formation and black lines on the outside of live chambered nautilus shells have been observed in all adult specimens at aquariums and zoos soon after the organisms enter aquaria. Black lines have also been observed in wild animals at sites of broken shell, but continued growth from that point returns to a normal, smooth structure. In contrast, rough irregular deposition of shell continues throughout residence in aquaria. The composition and reasons for deposition of the black material and mitigation of this irregular shell formation is the subject of the current study. A variety of analytical techniques were used, including stable isotope mass spectrometry (SI-MS), inductively coupled plasma mass spectrometry (ICP-MS), micro x-ray fluorescence (µXRF), X-ray diffraction (XRD), and scanning electron microscopy (SEM) based X-ray microanalysis. Results indicate that the black material contains excess amounts of copper, zinc, and bromine which are unrelated to the Nautilus diet. The combination of these elements and proteins plays an important role in shell formation, growth, and strengthening. Further study will be needed to compare the proteomics of the shell under aquaria versus natural wild environments. The question remains as to whether the occurrence of the black lines indicates normal healing followed by growth irregularities that are caused by stress from chemical or environmental conditions. In this paper we begin to address this question by examining elemental and isotopic differences of Nautilus diet and salt water. The atomic composition and light stable isotopic ratios of the Nautilus shell formed in aquaria verses wild conditions are presented.
[Mh] Termos MeSH primário: Exoesqueleto/química
Exoesqueleto/crescimento & desenvolvimento
Animais de Zoológico
Dieta
Nautilus/crescimento & desenvolvimento
[Mh] Termos MeSH secundário: Animais
Bromo/análise
Cobre/análise
Espectrometria de Massas/veterinária
Microscopia Eletrônica de Varredura/veterinária
Água do Mar/química
Espectrometria por Raios X/veterinária
Difração de Raios X/veterinária
Zinco/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
789U1901C5 (Copper); J41CSQ7QDS (Zinc); SBV4XY874G (Bromine)
[Em] Mês de entrada:1504
[Cu] Atualização por classe:140818
[Lr] Data última revisão:
140818
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:140507
[St] Status:MEDLINE
[do] DOI:10.1002/zoo.21132



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