... transek . Hasil penelitian menemukan 5 jenis kima, yaitu Tridacna squamosa, Tridacna maxima, Tridacna maxima, Tridacna gigas dan Hipoppus hipoppus . Kelimpahan relatif individu tertinggi pada Tridacna squamosa sebesar 38,54% dan terendah Hipoppus hipoppus sebesar 0,52%. Kepadatan individu tertinggi pada Tridacna crocea sebesar 0.048 dan terendah pada Tridacna gigas yaitu 0.0013. Terdapat tiga pola distribusi ... lokasi penelitian, yaitu pola distribusi mengelompok pada jenis Tridacna sqoamosa , Tridacnacrocea, dan Tridacna maxima . Pola distribusi acak ...
Tópico(s): Food and Agricultural Sciences
2017 - | Agrikan Jurnal Agribisnis Perikanan
Bridget Ayling, Stephen M. Eggins, Malcolm T. McCulloch, John Chappell, Rainer Grün, Graham Mortimer,
... chemical and isotopic distribution of uranium in fossil Tridacna gigas (giant clams) from Marine Isotope Stage (MIS) ... and LA-MC-ICPMS techniques. Within each fossil Tridacna specimen, marked differences in uranium concentrations are observed across the three Tridacna growth zones (outer, inner, hinge), with the outer ... relatively enriched. In MIS 5e and MIS 11 Tridacna, the outer and hinge zones contain approximately 1 ... average 50% too young for the MIS 5e Tridacna, and 25% too young for the MIS 11 Tridacna. A complex, multi-stage uptake and loss history ...
Tópico(s): Geology and Paleoclimatology Research
2017 - Elsevier BV | Geochimica et Cosmochimica Acta
Xiaolin Ma, Hong Yan, Haobai Fei, Chengcheng Liu, Ge Shi, Enqing Huang, Yue Wang, Xiaoli Qu, Ergang Lian, Haowen Dang,
... hinders our full understanding of global climate dynamics. Tridacna gigas shells have a large potential to quantitatively ... while the applicability of the geochemical proxies of Tridacna gigas needs to be quantitively investigated. Here we establish a chronology for a Tridacna gigas shell from the southern South China Sea ( ... laser scanning confocal microscope (LSCM). Our high-resolution Tridacna gigas shell δ18Oshell record throughout 1989–2013 shows ... change in the southern SCS based on the Tridacna gigas shell δ18O record. Our salinity-budget calculation ...
Tópico(s): Oceanographic and Atmospheric Processes
2020 - Elsevier BV | Palaeogeography Palaeoclimatology Palaeoecology
Serge Andréfouët, Simon Van Wynsberge, Cécile Fauvelot, Andrew W. Bruckner, Georges Remoissenet,
... Africa to the Eastern Pacific biogeographic region. The Tridacna genus is currently revised with numerous cryptic species identified with molecular markers. New Tridacna records from the fringe of the known distribution ... to examine processes associated with species differentiation. While Tridacna maxima is abundant in French Polynesia (Central South Pacific Ocean) the larger fluted giant clam Tridacna squamosa was formerly reported only in the Austral ... a relic distribution across the Central Pacific Ocean. Tridacna squamosa is rare, but present throughout Tuamotu and ...
Tópico(s): Echinoderm biology and ecology
2014 - Taylor & Francis | Molluscan Research
Jennifer Ashworth, Rupert Ormond, Helen T Sturrock,
... South Sinai, Egypt. The catch is dominated by Tridacna spp. and Octopus spp. Within the Nabq Managed ... all three years showed significantly higher abundances of Tridacna and Tectus dentatus in the NTZs, with greater ... distributions revealed both a greater size range of Tridacna and a greater mean size of both Tridacna and Te. dentatus, within the NTZs, as compared ... fished areas. The size–frequency distribution of gleaned Tridacna, determined from discarded shells, also showed a smaller size range than did live Tridacna within the NTZs. By contrast, holothurians, which are ...
Tópico(s): Marine and coastal plant biology
2004 - Elsevier BV | Journal of Experimental Marine Biology and Ecology
... years since archaeologists began dealing with the engraved Tridacna shells, whose distribution extended from Vulci in the ... be imitations made of various stones, as authentic Tridacna shells. In this article I want to show ... this is true not only with the complete Tridacna shells, but also of a sub-group of Tridacna shells cut into the shape of discs. I ... the items in this sub-group are indeed Tridacna shells by describing them and discussing their motives ... in a separate publication which will treat the Tridacna shell group as a whole.
Tópico(s): Ancient Egypt and Archaeology
1984 - Cambridge University Press | Anatolian Studies
G. Uhlenbruck, G. Steinhausen, Brian A. Baldo,
... galactan precipitins in the haemolymph from different Tridacnids, Tridacna maxima and Tridacna gigas , were compared by various serological methods. 2. ... haemolymph fluids. 3. 3. In the haemolymph of Tridacna maxima one strong anti-galactan can be detected, whereas in the haemolymph of Tridacna gigas two other anti-galactans have been found. 4. 4. These two anti-galactans from Tridacna gigas show an interesting serological relationship to the ...
Tópico(s): Aquaculture disease management and microbiota
1977 - Elsevier BV | Comparative Biochemistry and Physiology Part B Comparative Biochemistry
Chengcheng Liu, Liqiang Zhao, Nanyu Zhao, Wei Yang, Jialong Hao, Xiaoli Qu, Shan Liu, John Dodson, Hong Yan,
... order to reconstruct past weather changes. Giant clams (Tridacna spp.) are the largest bivalves in the world. ... width between two bright fluorescent bands of the Tridacna shell with the help of CooRecorder 9.0 ... ratio data in each daily cycle derived from Tridacna shell, and then calculating the daily growth increment ... methods can estimate the daily growth increment of Tridacna shell reliably. The methods developed here lay the ... for paleoweather reconstruction using daily growth increments of Tridacna spp.
Tópico(s): Marine Bivalve and Aquaculture Studies
2021 - Elsevier BV | Ecological Indicators
Lincoln Rehm, Lincy Lee Marino, Randa Jonathan, A. Holt, Richard M. McCourt, Alison M. Sweeney,
... 2017. This is the first documented finding of Tridacna noae in Palau, however, it was rare. Only ... a diverse and abundant population of giant clams. Tridacna crocea (an important food and economic resource) exhibited ... 0 ± 2.9 individuals per 50 m 2 . Tridacna maxima and Tridacna squamosa were ranked next in abundance. In contrast, T. noae , Tridacna derasa , Tridacna gigas , and Hippopus hippopus were found in low ...
Tópico(s): Coral and Marine Ecosystems Studies
2021 - Wiley | Aquatic Conservation Marine and Freshwater Ecosystems
Yue Hu, Xiaoming Sun, Hai Cheng, Hong Yan,
Abstract. Giant clams (Tridacna) are the largest marine bivalves, and their carbonate shells can be used for high-resolution paleoclimate reconstructions. In this ... the modern resampled monthly (r-monthly) resolution of Tridacna gigas δ18Oshell. The results obtained reveal that δ18Oshell ... to local SSS change. Thus, the δ18O of Tridacna shells can be roughly used as a proxy ... r-monthly δ18O of a 40-year-old Tridacna squamosa (3673±28 BP) from the North Reef ... difference between the average δ18O of the fossil Tridacna shell (δ18O =-1.34 ‰) and the modern Tridacna ...
Tópico(s): Methane Hydrates and Related Phenomena
2020 - Copernicus Publications | Climate of the past
Thomas Huelsken, Jude Keyse, Libby Liggins, Shane Penny, Eric A. Treml, Cynthia Riginos,
Giant clams (genus Tridacna) are iconic coral reef animals of the Indian and Pacific Oceans, easily recognizable by their massive shells and vibrantly colored mantle tissue. Most Tridacna species are listed by CITES and the IUCN ... and depleted in many regions. Here, we survey Tridacna crocea and Tridacna maxima from the eastern Indian and western Pacific ... monophyletic group that is evolutionarily distinct from named Tridacna species at both mitochondrial and nuclear loci. This ...
Tópico(s): Coral and Marine Ecosystems Studies
2013 - Public Library of Science | PLoS ONE
Kevin A. Francesconi, John S. Edmonds, Robert V. Stick,
The kidney of the giant clam Tridacna maxima contains algal arsenic compounds, probably as a consequence of the clam's symbiotic relationship with unicellular algae (zooxanthallae). Extraction of Tridacna kidneys yielded three novel arsenic compounds, N-(5′- ... by synthesis. Extraction of a second batch of Tridacna kidneys gave, in addition to compounds identified in ... reported. The presence of the nucleoside 16 in Tridacna, as a consequence of algal metabolism, supports a ... presence of both compounds 16 and 21 in Tridacna may represent the first example of donation, by ...
Tópico(s): Chemical Analysis and Environmental Impact
1992 - | Journal of the Chemical Society. Perkin transactions I/Journal of the Chemical Society. Perkin transactions. I
Mei Lin Neo, Kah Kheng Lim, Sung‐Yin Yang, Giun Yee Soong, Giovanni Masucci, Piera Biondi, Hin Boo Wee, Hiroki Kise, James Davis Reimer,
... 100 m 2 , from most to least abundant: Tridacna crocea , Tridacna maxima , Tridacna squamosa , and Tridacna noae . The previously reported species Tridacna gigas and Hippopus hippopus were both absent from ...
Tópico(s): Marine and coastal plant biology
2019 - Wiley | Aquatic Conservation Marine and Freshwater Ecosystems
Manal S. Mekawy, Hashem A. Madkour,
In Egypt, Tridacna Maxima are found in Gulf of Suez, Gulf of Aqaba and Red Sea. Tridacna Maxima are very important ecological species as seafood ... stratigraphic position, systematic palaeontology and geographic distribution of Tridacna Maxima. In addition to their ecologic and environmental ... these species from extinction were listed. Individuals of Tridacna Maxima were collected from different sites along the ...
Tópico(s): Marine and environmental studies
2012 - Scientific Research Publishing | International Journal of Geosciences
Jonathan P. A. Gardner, C Boesche, JM Meyer, Alex J. Wood,
... and brine-preserved meat of the giant clam Tridacna maxima from the central Pacific Ocean Jonathan P. ... nz ABSTRACT: DNA was extracted from giant clam Tridacna maxima shells and from brine-preserved meats for ... origin of museum specimens. KEY WORDS: Giant clams · Tridacna · DNA extraction · Phylogeography · Conservation Full text in pdf ... and brine-preserved meat of the giant clam Tridacna maxima from the central Pacific Ocean. Mar Ecol ...
Tópico(s): Identification and Quantification in Food
2012 - Inter-Research | Marine Ecology Progress Series
Christopher S. Romanek, Ethan L. Grossman,
... were constructed for specimens of the giant clam Tridacna maxima and an encrusting bivalve (Chama cf savignyi) ... water. Ontogeny also influences the isotopic record of Tridacna. Once maturity is reached, growth is suppressed by ... free bivalve Chama and the symbiont-bearing bivalve Tridacna it encrusts suggests that the presence of symbionts ... no identifiable effect on the isotopic composition of Tridacna shells.
Tópico(s): Isotope Analysis in Ecology
1989 - Society for Sedimentary Geology | Palaios
Da Shao, Yanjun Mei, Zhongkang Yang, Yuhong Wang, Wenqing Yang, Yuesong Gao, Lianjiao Yang, Liguang Sun,
... the shells of one modern and four fossil Tridacna from the Xisha Islands in the SCS. The ... the modern sample reveal that the shells of Tridacna are a good proxy of ENSO variability. We ... of the oxygen isotope composition of four fossil Tridacna to produce high-resolution records of ENSO activity ...
Tópico(s): Isotope Analysis in Ecology
2020 - Nature Portfolio | Scientific Reports
Jun Liu, Dan Cui, Hui Wang, Jiawei Chen, Helu Liu, Haibin Zhang,
... cytochrome c oxidase subunit I (COI) sequences for Tridacna species, focusing on new sequences from Hainan Island ... Islands and the Red Sea. Three nominal species, Tridacna crocea, T. squamosa and T. noae, were recognized ... distances of 10.6–24.7% for seven Tridacna species (T. crocea, T. squamosa, T. noae, T. ... operational taxonomic units (OTUs) for the seven nominal Tridacna species. These results, coupled with the fact that ...
Tópico(s): Ichthyology and Marine Biology
2019 - Oxford University Press | Journal of Molluscan Studies
Chunsheng Liu, Tingyou Li, Ertian Liu, Changlin Li, Aimin Wang, Zhifeng Gu,
... mantle of two species of the giant clams Tridacna crocea and Tridacna squamosa harvested from the lagoon of South China ...
Tópico(s): Echinoderm biology and ecology
2019 - National Shellfisheries Association | Journal of Shellfish Research
Viola Warter, Jonathan Erez, Wolfgang Müller,
... and Ba within bivalve shells of the genus Tridacna (e.g. Sano et al., 2012; Warter and ... physiology and shell geochemistry of the giant clam Tridacna crocea at daily time-resolution. We find that ... of the El/Ca variability. We hypothesize that Tridacna physiology and biochemistry is controlled by a circadian ...
Tópico(s): Marine Biology and Ecology Research
2018 - Elsevier BV | Palaeogeography Palaeoclimatology Palaeoecology
Jude Keyse, Eric A. Treml, Thomas Huelsken, Paul H. Barber, Timery S. DeBoer, Marc Kochzius, Agus Nuryanto, Jonathan P. A. Gardner, Li‐Lian Liu, Shane Penny, Cynthia Riginos,
... influences on population structure in the giant clams, Tridacna maxima (Röding, 1798) and T. crocea (Lamarck, 1819). ... of clade boundaries within a newly resurrected species, Tridacna noae (Röding, 1798). Location Indo‐Australian archipelago, including ... differentiation argues against the assumption that Indo‐Pacific Tridacna are open meta‐populations. Despite similar life histories, ...
Tópico(s): Genetic diversity and population structure
2018 - Wiley | Journal of Biogeography
Mei Lin Neo, Li‐Lian Liu, Danwei Huang, Keryea Soong,
... This study also examines the genetic patterns of Tridacna maxima and Tridacna noae, based on partial mitochondrial COI gene sequences. ...
Tópico(s): Genetic diversity and population structure
2018 - Elsevier BV | Regional Studies in Marine Science
Melissa Pappas, Song He, Royale S. Hardenstine, Hana Kanee, Michael L. Berumen,
... climate change). Several species of giant clams (genus Tridacna) are reported from the Red Sea, although the ... investigated the genetic diversity (16S rDNA) of the Tridacna species found in the central Saudi Arabian Red ... recorded, with the latter being the most abundant. Tridacna squamosina, a species recently reported in the northern ...
Tópico(s): Marine and fisheries research
2017 - Springer Science+Business Media | Marine Biodiversity
Michael S. Johnson, Jane Prince, Anne Brearley, Natalie L. Rosser, Robert Black,
... Recent genetic studies revealed that the giant clam Tridacna noae (Röding, 1798), previously confused morphologically with Tridacna maxima (Röding, 1798), is widespread in the Indo- ... Australia. We examined molecular and morphological variation of Tridacna from four intertidal populations at Ningaloo Reef to ...
Tópico(s): Aquatic Invertebrate Ecology and Behavior
2016 - Taylor & Francis | Molluscan Research
Ali Miserez, Youli Li, Joël Cagnon, James C. Weaver, J. Herbert Waite,
... found in the byssus of the giant clam, Tridacna maxima. The byssus consists of a bundle of ... like mechanical response. The amino acid composition of Tridacna byssus, however, is unlike tendon collagen, lacking high ... mechanical properties with the structural characteristics of the Tridacna byssal threads is proposed.
Tópico(s): Polymer Surface Interaction Studies
2011 - American Chemical Society | Biomacromolecules
... density and genetic structure of the giant clams Tridacna crocea and T. squamosa on Singapore’s reefs ... 0.067 per 100 m2. Only 2 species, Tridacna crocea and T. squamosa, were encountered, compared to ... density and genetic structure of the giant clams Tridacna crocea and T. squamosa on Singapore’s reefs. ...
Tópico(s): Marine Biology and Ecology Research
2011 - Inter-Research | Aquatic Biology
Giovanni Accordi, Mauro Brilli, Federico Carbone, Mario Voltaggio,
... of morphological terraces. Shallow subtidal coralgal facies containing Tridacna gigas shells are found at different heights along ... of open system isochron dating after separating the Tridacna samples into three different groups on the basis ... of these shells, and then the paleobathymetry of Tridacna facies has been inferred.
Tópico(s): Geological formations and processes
2010 - Elsevier BV | Journal of African Earth Sciences
Rachel Ravago‐Gotanco, Richard M. Magsino, MA Juinio-Meñez,
... Equatorial Current on the population genetic structure of Tridacna crocea (Mollusca: Tridacnidae) along the eastern Philippine seaboard ... City 1101, Philippines *Email: rachelr@upmsi.ph ABSTRACT: Tridacna crocea populations were sampled from 15 locations throughout ... recruitment along the eastern Philippine seaboard. KEY WORDS: Tridacna · Genetic structure · Gene flow · North Equatorial Current · Oceanography · ...
Tópico(s): Coral and Marine Ecosystems Studies
2007 - Inter-Research | Marine Ecology Progress Series
Bela H. Buck, Harald Rosenthal, Ulrich Saint‐Paul,
... by a nutrient limitation on the metabolism of Tridacna gigas, to test, if these environmental changes can ... thermique sur la symbiose de Symbiodinium microadriaticum et Tridacna gigas. Cette étude a été lancée, suite au ... une limite en nutriments, sur le métabolisme de Tridacna gigas, pour tester si des changements environnementaux peuvent ...
Tópico(s): Marine Bivalve and Aquaculture Studies
2002 - EDP Sciences | Aquatic Living Resources
Jay A. Schneider, Diarmaid Ó Foighil,
... phylogenetic hypothesis indicates that the genera Hippopus and Tridacna are monophyletic sister taxa. Tridacna (Chametrachea) is the sister taxon to (T. tevoroa ( ... taxa all being placed in a single subgenus, Tridacna (Tridacna). The number of recognized giant clam species has ...
Tópico(s): Ichthyology and Marine Biology
1999 - Elsevier BV | Molecular Phylogenetics and Evolution