Relevant bibliographies by topics / Thais (Mollusks)

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  2. Dissertations / Theses
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Academic literature on the topic 'Thais (Mollusks)'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Thais (Mollusks)"

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Fera Rahmawati, Yunita, Rizka Apriani Putri, Tatag Bagus Putra Prakarsa, Milade Annisa Muflihaini, and Yoga Putra Aliyani. "Diversity and Distribution of Molluscs in the Intertidal Zone of Nglambor Beach, Gunung Kidul, Yogyakarta." BIO Web of Conferences 33 (2021): 01002. http://dx.doi.org/10.1051/bioconf/20213301002.

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The intertidal zone is the area between the highest and lowest tides, which represents the transition from ocean conditions to land conditions. This study aimed to determine the diversity and distribution of mollusks that exist along the intertidal zone of Nglambor Beach, between August and November 2020. Observations of all molluscs were carried out at two random stations using 10 plots measuring 1 x 1 m 2 with 5 meters. A total of two classes of Mollusca (Gastropod and Bivalvia) belonging to twelve families and 19 species were found from upper to lower an intertidal zone. The upper intertidal zone was recorded to have the highest diversity and an evenness index (Shannon-Wiener diversity index: H ’= 2.524 and Pielou evenness index: J’ = 0.932) compared to the middle and lower zones. It can be concluding that the diversity index in the study location is categorized as medium and its evenness is high. Thais hippocastanum is the most dominant species found in the upper and middle zones, while Thais tissoti dominates in the lower zone. This research contributed to a preliminary checklist on molluscs, which will support a baseline study on the intertidal in future.
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Ki, Jang-Seu, Young-Mi Lee, Sang-Oun Jung, Toshihiro Horiguchi, Hyeon-Seo Cho, and Jae-Seong Lee. "Mitochondrial genome of Thais clavigera (Mollusca: Gastropoda): Affirmation of the conserved, ancestral gene pattern within the mollusks." Molecular Phylogenetics and Evolution 54, no. 3 (March 2010): 1016–20. http://dx.doi.org/10.1016/j.ympev.2009.12.003.

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Castro, Ítalo Braga de, Carlos A. O. Meirelles, Helena Matthews-Cascon, and Marcos Antonio Fernandez. "Thais (Stramonita) rustica (Lamarck, 1822) (Mollusca: Gastropoda: Thaididae), a potential bioindicator of contamination by organotin northeast Brazil." Brazilian Journal of Oceanography 52, no. 2 (June 2004): 135–39. http://dx.doi.org/10.1590/s1679-87592004000200005.

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The use of antifouling paints containing the biocide compound tributyltin (TBT) has been shown as an inductor of imposex in neogastropods mollusks. Imposex is characterized by the development of male features in females, mainly the appearance of a no functional vas deferens and penis. Samples of Thais rustica were collected in eight sites in the metropolitan area of Natal city, Rio Grande do Norte state, northeast Brazil, and examined for occurrence of imposex, which was found in many females. The higher imposex levels were presented by samples from sites near city harbor.
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TAN, K. S., and J. B. SIGURDSSON. "NEW SPECIES OF THAIS (NEOGASTROPODA, MURICIDAE) FROM SINGAPORE, WITH A RE-DESCRIPTION OF THAIS JAVANICA (PHILIPPI, 1848)." Journal of Molluscan Studies 62, no. 4 (1996): 517–35. http://dx.doi.org/10.1093/mollus/62.4.517.

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Marini, Antonio Carlos. "Contribuição ao conhecimento de Thais mariae, Morretes, 1954 (Mollusca prosobranchia)." Revista Brasileira de Zoologia 5, no. 2 (1988): 311–23. http://dx.doi.org/10.1590/s0101-81751988000200013.

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Lima, Ana Valêsca P., and Inês X. Martins. "Histomorfologia do órgão acessório de perfuração de Thais haemastoma (Mollusca, Gastropoda)." Iheringia. Série Zoologia 99, no. 2 (June 2009): 149–52. http://dx.doi.org/10.1590/s0073-47212009000200005.

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Os representantes da família Thaididae são organismos predadores de outros moluscos, perfurando suas conchas pela ação alternada de secreção oriunda do "Accessory Boring Organ" (ABO) e por raspagem através da rádula. Nesta família, o ABO está localizado na porção ventral mediano-anterior do pé. Os animais examinados neste estudo foram coletados na praia do Futuro, Fortaleza, em seguida levados ao laboratório para fixação e posterior tratamento histológico rotineiro. A porção glandular do ABO de Thais haemastoma (Linnaeus, 1758) se encontra alojada em uma cavidade circundada pela musculatura do pé e apresentando um ducto excretório que a comunica com o meio externo. Esta cavidade é revestida por um epitélio cilíndrico simples separando a porção glandular deste órgão do músculo pedioso, sendo contínuo com o epitélio de revestimento do ducto excretório. Subjacente a este tecido foi visualizado um tecido conjuntivo frouxo. A região glandular do ABO da espécie apresenta um formato discoidal com superfície irregular devido à presença de reentrâncias em direção à porção central da glândula. O epitélio glandular pseudoestratificado com células cilíndricas e ciliadas reagiu negativamente aos testes histoquímicos. Abaixo do epitélio, foi observado um tecido conjuntivo frouxo de sustentação.
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Perkins, E. J. "The Biological Accumulation and Monitoring of Chemical Wastes in Arctic Waters." Water Science and Technology 18, no. 2 (February 1, 1986): 1–11. http://dx.doi.org/10.2166/wst.1986.0011.

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The biological accumulation and monitoring of chemical wastes are considered with particular reference to the Solway Firth, U.K. Monitoring of the influence of chemical wastes may be concerned with somatic or reproductive responses and is more usually the former. It is shown that size and abundance are not an indication of a species fertility which is crucial to its conservation. Diet has an important influence upon the magnitude of the trace element burden of gastropod molluscs and it is shown that the fertility of Patella vulgata and Littorina littorea is unaffected by marked increases in the trace element burden. In this study, some of the species examined viz., the polychaete worms Phyllodoce maculata and Scoloplos armiger, the decapod crustacean Pagurus bernhardus and the gastropod molluscs, Littorina littorea and Thais lapillus, have a distribution which extends into arctic waters. Clearly such animals offer the opportunity for comparative studies to test the more general application of the work reported. Such comparative work would also facilitate efforts to apply data from the boreal region to problems in the Arctic.
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Afsar, Nuzhat, Ghazala Siddiqui, and Zarrien Ayub. "Bioindicator Thais carinifera (mollusca, gastropoda): imposex response and consequences along the Pakistan coast during the period from 1993 to 2012." Brazilian Journal of Oceanography 63, no. 2 (June 2015): 115–24. http://dx.doi.org/10.1590/s1679-87592015082006302.

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Abstract Endocrine mediated "imposex" phenomenon was investigated and recorded in the muricoid gastropod species Thais carinifera during the two decades from 1993 to 2012 at three (3) sites out of six (6) localities investigated along the Sindh and Balochistan coast, Pakistan. The VDS stages 1 to 4 were apparent in Thais carinifera. The intensity of imposex has remained comparatively low in the populations of harbours in close proximity to port Mohammad Bin-Qasim, namely; Old Korangi Fish Harbour (OKFH) and New Korangi Fish Harbour (NKFH) where shipping activities are sporadic as compared to those in Manora Channel and the adjoining Karachi Port area where intensive shipping activity is rather frequent. Target species found to be good bioindicators have shown a marked decrease over the prolonged study period. Investigations show that this decrease is solely due to globally imposed effective bans on tributyltin (TBT) based antifouling paints over the past decade.
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Horiguchi, T., H. Shiraishi, M. Shimizu, and M. Morita. "Imposex and organotin compounds in Thais clavigera and T. bronni in Japan." Journal of the Marine Biological Association of the United Kingdom 74, no. 3 (August 1994): 651–69. http://dx.doi.org/10.1017/s002531540004772x.

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Rates of occurrence and degrees of imposex, and tissue concentrations of organotin compounds (tributyltin, TBT; dibutyltin, DBT; butyltin, MBT; triphenyltin, TPT; diphenyltin, DPT; and phenyltin, MPT) in the rock shell, Thais clavigera and T. bronni (Mollusca: Gastropoda) were investigated at 32 sites in Japan from May 1990 to October 1992. The rate of occurrence of imposex was 100% in both species, at almost all sites surveyed. Degrees of imposex indicated by relative penis length (RPL) index reflected the pollution levels not only of TBT, but also TPT. In heavily polluted areas, many individuals were found with oviducts which were blocked by vas deferens development, and capsule glands which were filled with aborted egg masses. These organisms were thought to be sterile.
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Goto, Y., M. Kajiwara, Y. Yanagisawa, H. Hirose, T. Yoshimi, M. Umemura, H. Nakano, et al. "Detection of vertebrate-type steroid hormones and their converting activities in the neogastropod Thais clavigera (Kuster, 1858)." Journal of Molluscan Studies 78, no. 2 (February 20, 2012): 197–204. http://dx.doi.org/10.1093/mollus/eys001.

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Dissertations / Theses on the topic "Thais (Mollusks)"

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Tong, Kit-ying Lily. "The population dynamics and feeding ecology of Thais clavigera (Kuster) and Morula musiva (Kiener) (mollusca: gastropoda: muricidae) in Hong Kong /." [Hong Kong] : University of Hong Kong, 1986. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12320882.

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Blackmore, Graham Ralph. "The importance of feeding ecology in investigating accumulated heavy metal body burdens in Thais clavigera (KÜSTER) (mollusca: neogastropoda: muricidae) in Hong Kong /." Hong Kong : University of Hong Kong, 1998. http://sunzi.lib.hku.hk/hkuto/record.jsp?B20358167.

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唐潔瑩 and Kit-ying Lily Tong. "The population dynamics and feeding ecology of Thais clavigera (Kuster) and Morula musiva (Kiener) (mollusca: gastropoda: muricidae)in Hong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1986. http://hub.hku.hk/bib/B31207455.

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Books on the topic "Thais (Mollusks)"

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Lischka, Silke, and Holger Ossenbrügger. Mollusca: Holoplanktonic Molluscs. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780199233267.003.0032.

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This chapter describes the taxonomy of Mollusca. Members of the phylum Mollusca are characterized by fleshy, muscular bodies often possessing either external or internal calcareous shells and include the familiar snails, clams, oysters, squid, and octopus. Aside from the Arthropoda, the Mollusca are one of the most conspicuous and diverse group of invertebrates. The chapter covers their life cycle, ecology, and general morphology. It includes a section that indicates the systematic placement of the taxon described within the tree of life, and lists the key marine representative illustrated in the chapter (usually to genus or family level). This section also provides information on the taxonomic authorities responsible for the classification adopted, recent changes which might have occurred, and lists relevant taxonomic sources.
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West, Lani. Prey selection by the tropical marine snail Thais melones: A study of the effects of interindividual variation and foraging experience on growth and gonad development. 1985.

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Düring, Bleda S. Millennia in the Middle? Reconsidering the Chalcolithic of Asia Minor. Edited by Gregory McMahon and Sharon Steadman. Oxford University Press, 2012. http://dx.doi.org/10.1093/oxfordhb/9780195376142.013.0036.

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This article focuses on how people lived in Asia Minor between about 5500 and 3000 BCE. It argues that the idea of a period dominated by small-scale, largely autarchic farming societies does not stand up to scrutiny. Although farming was of significant importance at many Chalcolithic societies in Asia Minor, the idea that wild food resources were no longer important is clearly mistaken. The Chalcolithic people were expanding their economies in multiple and often ingenious ways, and were increasingly partners in large exchange networks. Apart from farming, the exploitation of marine resources such as mollusks and fish has been documented. The rise of seafaring can be recognized through the distribution of Melos obsidian and the emergence of a cultural horizon in the northern Aegean that included western Asia Minor and the Aegean islands.
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Newman, Leslie, and Lester Cannon. Marine Flatworms. CSIRO Publishing, 2003. http://dx.doi.org/10.1071/9780643101197.

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Marine Flatworms provides a fascinating introduction to the intriguing world of polyclad flatworms, a group of large, free-living marine Platyhelminthes, which are found throughout the world but are most colourful in tropical waters. Although not related to molluscs, they are often mistaken for sea slugs because of their brilliant colour patterns. Written in an accessible style by two leading experts in the field, this book explores flatworms’ unusual structure, feeding habits, their curious reproductive behaviour (including ‘penis fencing’), their mimicry and toxicology. With a foreword by Professor Reinhardt Kristensen of the Copenhagen Zoological Museum, Marine Flatworms is the first comprehensive guide to polyclad families and genera. It contains more than 300 colour photographs from every part of the world.
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Chapman, Blake, and Astred Hicks. Ocean Animals. CSIRO Publishing, 2020. http://dx.doi.org/10.1071/9781486311422.

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Dive in to the incredible world of ocean animals! Ocean animals are truly awesome. They come in every size, colour and shape imaginable. They are also some of the weirdest, sneakiest and smartest animals on the planet! This book focusses on the features and skills that make these creatures extra-incredible. You will discover animals that are masters of defence and others that use high speeds to eat or avoid being eaten. There are sea creatures that use their size as an advantage, both big and small, and others that are just really, really smart! Whether you’re a fan of fish, a connoisseur of crustaceans, mad about molluscs or just love jellyfish, Ocean Animals has got you covered. You may even discover some fantastical creatures you never knew existed. Full of fun facts, 'sea-lebrity' species profiles and amazing pictures, you will also learn about issues threatening marine life and tips on how to help protect our amazing ocean environments.
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Rogers, Kerrylee, and Timothy J. Ralph, eds. Floodplain Wetland Biota in the Murray-Darling Basin. CSIRO Publishing, 2010. http://dx.doi.org/10.1071/9780643100992.

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Floodplain wetlands of the Murray-Darling Basin provide critical habitat for numerous species of flora and fauna, yet the ecology of these wetlands is threatened by a range of environmental issues. This book addresses the urgent need for an improved ecohydrological understanding of the biota of Australian freshwater wetlands. It synthesises key water and habitat requirements for 35 species of plants, 48 species of waterbirds, 17 native and four introduced species of fish, 15 species of frogs, and 16 species of crustaceans and molluscs found in floodplain wetlands of the Murray-Darling Basin. Each species profile includes: the influence of water regimes on the survival, health and condition of the species; key stimuli for reproduction and germination; habitat and dietary preferences; as well as major knowledge gaps for the species. Floodplain Wetland Biota in the Murray-Darling Basin also provides an overview of the likely impacts of hydrological change on wetland ecosystems and biota, in the context of climate change and variability, with implications for environmental management. This important book provides an essential baseline for further education, scientific research and management of floodplain wetland biota in the Murray-Darling Basin.
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Key questions in biodiversity: a study and revision guide. Wallingford: CABI, 2021. http://dx.doi.org/10.1079/9781789248630.0000.

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Abstract An understanding of biodiversity is an important requirement of a wide range of programs of study including biology, zoology, wildlife conservation and environmental science. This book is a study and revision guide for students following such programs in which biodiversity is an important component. It contains 600 multiple-choice questions (and answers) set at three levels namley foundation, intermediate and advanced, and grouped into 10 major topic area: principles of classification and taxonomy; comparative anatomy and physiology; protoctists, monerans, fungi, lichens and acellular organisms; lower plants and pteridophytes; seed-bearing plants; sponges, cnidarians, nematodes and minor animal phyla; platyhelminths, annelids and molluscs; arthropods and echinoderms; fishes, amphibians and reptiles; and b0. Birds and mammals. The book has been produced in a convenient format so that it can be used at any time in any place. It allows the reader to learn and revise the meaning of terms used in animal and plant classification, the principles of comparative physiology, and the characteristics of, and diversity in, the major animal and plant taxa. The structure of the book allows the study of one topic area or group of taxa at a time, progressing through simple questions to those that are more demanding. Many of the questions require students to use their knowledge to identify organisms and biological structures from drawings or photographs.
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Albarella, Umberto, Mauro Rizzetto, Hannah Russ, Kim Vickers, and Sarah Viner-Daniels, eds. The Oxford Handbook of Zooarchaeology. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780199686476.001.0001.

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This book presents a survey of world archaeology, from the point of view of animal remain studies. It can be considered as a showcase for world zooarchaeology. Forty-eight chapters written by researchers from twenty-five countries discuss archaeological investigations in five different continents. The geographic range covers the Arctic as well as the Tropics, islands and continental land masses, marine shores, forests, hills, and mountains. Human interactions with many different creatures—ranging from mammals to birds, fishes, and molluscs—are discussed, and in a great variety of ecological and cultural contexts. Methodological approaches are also diverse, as they are chosen according to the themes and research questions discussed in individual chapters. The full range of zooarchaeological methods is on display, but also integration with evidence deriving from sister disciplines, such as history, ethnography, zoology, palaeontology, and biochemistry. A methodological glossary helps the reader, particularly the non-specialist, to get a grasp of the multitude of methodological approaches presented in the book. Most aspects of human–animal relationships—from hunting to husbandry, herding, and fishing, as well as the use of animals in ritual and social contexts—are discussed in one or more chapters, also covering all the greatest human civilizations. As a whole, these investigations authoritatively show the essential role that animals have played in human history. The book is the result of an ambitious project, never previously attempted at such scale; it aims to affirm the centrality of zooarchaeology in our investigation of past humanities.
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Book chapters on the topic "Thais (Mollusks)"

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Rees, Paul A. "Platyhelminths, annelids and molluscs." In Key questions in biodiversity: a study and revision guide, 103–17. Wallingford: CABI, 2021. http://dx.doi.org/10.1079/9781789248630.0007.

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Burns, Alison. "The Mesolithic Footprints Retained in One Bed of the Former Saltmarshes at Formby Point, Sefton Coast, North West England." In Reading Prehistoric Human Tracks, 295–315. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-60406-6_16.

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AbstractIn the early Holocene period, extensive tracts of coastal land were submerged as the climate warmed and meltwaters flooded into the oceans. As the Irish Sea expanded, coastlines altered and large intertidal zones were created as tracts of low-lying land at the tidal margins were gradually submerged. In these areas, reed swamp and saltmarsh formed which, too, were inundated for varying periods of time. However, in the calmer warmer weather of the late spring and summer, birds and mammals were drawn on to the mudflats where they could feed on molluscs, or new reed and sedge shoots, wallow in the cooling mud, drink the brackish water or, for some predators, hunt. The behavioural tendencies of some species are revealed by their footprints which show their engagement within this environment – some breeds moved on to the marshes while others moved away. The humans who shared this landscape understood the opportunities offered by these predictable behaviours. Their trails run along and across those left by many species, leaving a visible network of human and animal activity preserved in the hardened mud. These will be described through an examination of the footprints recorded in three contexts which formed the stratigraphy of a Mesolithic bed at Formby Point in North West England. The persistent return to the mudflats by generations of people reflects an embodied knowledge of this coastal landscape, learnt in childhood and practiced in adulthood. The ability to modify movements in the landscape, to respond to the daily tides, the changing seasons and a fluctuating environment, all suggest a spatial-temporal relationship which not only encompassed a dynamic environment but also the other life that dwelt within it.
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Ohman, Alexis. "Not Much Ado about Mollusks." In An Archaeology and History of a Caribbean Sugar Plantation on Antigua, 83–96. University Press of Florida, 2020. http://dx.doi.org/10.5744/florida/9781683401285.003.0006.

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This chapter discusses the ways mollusks were differentially integrated into plantation foodways practices at Betty’s Hope. The focus on mollusk data is significant because it is frequently overlooked in historical zooarchaeology and was the animal taxon that demonstrated the most dramatic difference in use along the race- and class-based divisions of those who lived and worked at Betty’s Hope. In this case, mollusks were least abundant in the Great House, while the faunal assemblage associated with enslaved African contexts were almost entirely comprised of mollusk material.
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Lowenstam, Heinz A., and Stephen Weiner. "Mollusca." In On Biomineralization. Oxford University Press, 1989. http://dx.doi.org/10.1093/oso/9780195049770.003.0008.

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Mollusks have a well-deserved reputation for being expert mineralizers based only on their much-admired shell-making abilities. Table 6.1 shows that the reputation is deserved 10-fold as shell formation is just one of many different processes that these animals perform in which biogenic minerals are utilized. The table lists no less than 21 different minerals and about 17 different functions! The list contains both amorphous minerals (amorphous fluorite, calcium carbonate, calcium phosphate, calcium pyrophosphate, and silica) and many crystalline ones, including rather uncommon ones such as weddelite, calcium fluorite, barite, magnetite, lepidocrocite, and goethite. Weddelite, for example, is a calcium oxalate mineral frequently formed pathologically in vertebrates. Certain gastropods use the rather soft weddelite nonpathologically to cap pestlelike objects (gizzard plates) in their stomachs (Lowenstam 1968), which they use for crushing shelled prey. One mollusk, the chambered Nautilus, forms no less than five different minerals. An individual tooth of a chiton contains three different mature minerals that are products of two other transient minerals. In addition to the more familiar functions of mineralized tissues, mollusks use biogenic minerals as buoyancy devices, trap doors, egg shells, and love darts. The varieties of crystal shapes, sizes, organizational arrays, and tissue sites present a picture of overwhelming diversity all within one phylum. It is illustrative to compare the mollusks with the echinoderms. The echinoderms also use minerals for a wide variety of functions, but in contrast to the mollusks they use essentially the same “building material” for many different purposes. Thus, understanding how one echinoderm mineralized tissue forms provides insight into how most of the others form. This is not so with mollusks. It seems futile to expect that they too have adapted one basic process to form all their mineralized tissues. It seems just as futile to look for a different explanation for each type of mineralized product. The mollusks force us to seek a level of understanding of mineralization that identifies common approaches, strategies, and principles and, at the same time, appears to dispel any “dreams” about discovering the mechanism of mineralization. The mollusk phylum contains seven different taxonomic classes.
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"Mangroves as Fish Habitat." In Mangroves as Fish Habitat, edited by James Hutchison, Philine zu Ermgassen, and Mark Spalding. American Fisheries Society, 2015. http://dx.doi.org/10.47886/9781934874424.ch1.

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<em>Abstract</em>.—Mangroves are widely understood to be important habitats for fisheries, supporting resident fish, crustacean, and mollusk populations as well as acting as nursery grounds for species that are targeted by offshore fisheries. There is, however, a lack of quantitative data on fisheries that operate in and around mangroves. We carried out a systematic search to gather data on mangrove fisheries from the scientific literature. We filtered the 4,358 studies returned by the search based on their title and abstract and extracted data from 169 of these. Despite the abundance of literature on mangrove fisheries, we were unable to build a data set of comparable, quantitative data of sufficient size to support numerical modeling approaches. In part, this is due to the variety of mangrove fisheries, which range from small-scale subsistence fishing for mollusks and crabs to large-scale industrialized prawn trawling. This is compounded by the broad range of reporting methods and metrics encountered in the literature. We make a number of recommendations to guide the future reporting of mangrove fisheries to allow for better quantification and comparison of fisheries values at large spatial scales.
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"Mangroves as Fish Habitat." In Mangroves as Fish Habitat, edited by James Hutchison, Philine zu Ermgassen, and Mark Spalding. American Fisheries Society, 2015. http://dx.doi.org/10.47886/9781934874424.ch1.

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<em>Abstract</em>.—Mangroves are widely understood to be important habitats for fisheries, supporting resident fish, crustacean, and mollusk populations as well as acting as nursery grounds for species that are targeted by offshore fisheries. There is, however, a lack of quantitative data on fisheries that operate in and around mangroves. We carried out a systematic search to gather data on mangrove fisheries from the scientific literature. We filtered the 4,358 studies returned by the search based on their title and abstract and extracted data from 169 of these. Despite the abundance of literature on mangrove fisheries, we were unable to build a data set of comparable, quantitative data of sufficient size to support numerical modeling approaches. In part, this is due to the variety of mangrove fisheries, which range from small-scale subsistence fishing for mollusks and crabs to large-scale industrialized prawn trawling. This is compounded by the broad range of reporting methods and metrics encountered in the literature. We make a number of recommendations to guide the future reporting of mangrove fisheries to allow for better quantification and comparison of fisheries values at large spatial scales.
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"Note concerning dates used in this work." In The Gwithian Landscape: Molluscs and Archaeology on Cornish Sand Dunes, xii. Archaeopress Publishing Ltd, 2018. http://dx.doi.org/10.2307/j.ctv1pdrq46.8.

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Perry, Steven F., Markus Lambertz, and Anke Schmitz. "The evolution of water-breathing respiratory faculties in invertebrates." In Respiratory Biology of Animals, 109–12. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780199238460.003.0009.

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This chapter aims at piecing together the evolution of water breathing in invertebrates. Dedicated respiratory faculties, consisting of an external exchanger, an internal transport system (circulatory system or an equivalent), and some control element are first clearly recognizable among invertebrates in annelids, which excel in the number of different respiratory proteins they display. Molluscs and arthropods use primarily haemocyanin, each group showing evolutionary trends in respiratory proteins that have some bearing on the phylogenetic position. Each major group of molluscs has its own evolutionary story, but in general we see a reduction in the number of gills and often a release from bilateral symmetry. Among arthropods, crustaceans can develop gills on various parts of the legs and the body wall, each group showing a taxon-specific type. Arachnids and hexapods are primarily terrestrial, but several groups have independently and secondarily developed mechanisms for even long-term survival under water.
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Perry, Steven F., Markus Lambertz, and Anke Schmitz. "Respiratory faculties of aquatic invertebrates." In Respiratory Biology of Animals, 65–83. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780199238460.003.0006.

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This chapter introduces the ‘who has what’ in terms of respiratory organs for major water-breathing invertebrate groups. It begins with sponges and cnidarians—groups that have no recognizable respiratory faculty—and continues through the bilaterian lineage, pointing out how bits and pieces of a respiratory faculty accumulate. The most complex respiratory faculties are found in molluscs and arthropods, which consequently make up the bulk of this chapter. Aside from the ancestral aquatic respiration, this chapter furthermore explains how also within some terrestrial (air-breathing) groups such as arachnids and insects, mechanisms that allow lone—even permanent—stays under water have secondarily arisen.
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Porcellis, Diego de Abreu, Diana F. Adamatti, and Paulo Cesar Abreu. "Biomass Variation Phytoplanktons Using Agent-Based Simulation." In Advances in Computational Intelligence and Robotics, 279–94. IGI Global, 2017. http://dx.doi.org/10.4018/978-1-5225-1756-6.ch012.

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The phytoplanktons are organisms that have limited locomotion about the current being drift in aquatic environment. Another characteristic of phytoplankton their growth and energy are result about photosynthetic process. It is important to emphasize that the phytoplankton is the main primary producer of aquatic environment, it means that, it is the base the aquatic food chain . The organic material produced by phytoplankton is responsible in provide the material and energy which sustains the growth of fish, crustaceans and mollusks, in marine ecosystems. Because of this, it is important to know the factors that interfere with their accumulation in environments mainly in fishing regions. In this way, this study tries to demonstrate the importance of retention time, often caused by hydrological issues, in the variation of phytoplankton biomass in the estuary of the Patos Lagoon (ELP), in Rio Grande/RS. To do that, we created one model that simulates this environment, using techniques of multi-agent-based simulation and its implementation was done with the NetLogo tool.
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Conference papers on the topic "Thais (Mollusks)"

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Vasechkina, Elena, Elena Vasechkina, Irina Kazankova, and Irina Kazankova. "AGGREGATION IMPACT ON THE FILTRATION AND GROWTH RATES OF MUSSELS MYTILUS GALLOPROVINCIALIS LAM." In Managing risks to coastal regions and communities in a changing world. Academus Publishing, 2017. http://dx.doi.org/10.21610/conferencearticle_58b43155d6717.

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This study presents the results of field and laboratory-based experiments performed to determine the mussel density effect on an individual mollusk’s growth and clearance rates. We measured the weight and length growth rates of single and aggregated mussels exposed into the sea for three monthly periods in summer and autumn 2015. The sample group contained 140 mollusks from natural populations within the length range of 15-20 mm. The average growth rate of aggregated mussels was almost the same as the growth rate of single ones. Clearance rate of single and aggregated mussels was measured in the laboratory using indirect method. There were selected 5 groups of mussels within the length ranges: 12-16 mm, 17-18 mm, 18-25 mm, 22-23 mm, and 35-38 mm. The clearance rate was measured for each mussel from the group and then for the whole group aggregated in a clump. Water temperature and seston concentration were the same for single and clumped mollusks. The volume of water in chambers was proportional to the weight of mussels put in water. The ratio of aggregated and single mussels’ clearance rates varied from 0.48 to 0.85 at the same density of aggregation and without regard to the animal size. Significant individual variability was recorded in all field and laboratory-based experiments.
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Vasechkina, Elena, Elena Vasechkina, Irina Kazankova, and Irina Kazankova. "AGGREGATION IMPACT ON THE FILTRATION AND GROWTH RATES OF MUSSELS MYTILUS GALLOPROVINCIALIS LAM." In Managing risks to coastal regions and communities in a changing world. Academus Publishing, 2017. http://dx.doi.org/10.31519/conferencearticle_5b1b938f5eee20.86116315.

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This study presents the results of field and laboratory-based experiments performed to determine the mussel density effect on an individual mollusk’s growth and clearance rates. We measured the weight and length growth rates of single and aggregated mussels exposed into the sea for three monthly periods in summer and autumn 2015. The sample group contained 140 mollusks from natural populations within the length range of 15-20 mm. The average growth rate of aggregated mussels was almost the same as the growth rate of single ones. Clearance rate of single and aggregated mussels was measured in the laboratory using indirect method. There were selected 5 groups of mussels within the length ranges: 12-16 mm, 17-18 mm, 18-25 mm, 22-23 mm, and 35-38 mm. The clearance rate was measured for each mussel from the group and then for the whole group aggregated in a clump. Water temperature and seston concentration were the same for single and clumped mollusks. The volume of water in chambers was proportional to the weight of mussels put in water. The ratio of aggregated and single mussels’ clearance rates varied from 0.48 to 0.85 at the same density of aggregation and without regard to the animal size. Significant individual variability was recorded in all field and laboratory-based experiments.
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3

Belli, Mateus, Thiago Felski Pereira, and Alex Luciano Roesler Rese. "Sistema de Coleta e Documentação de Microalgas." In Computer on the Beach. Itajaí: Universidade do Vale do Itajaí, 2020. http://dx.doi.org/10.14210/cotb.v11n1.p162-168.

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The multiplication of harmful microalgae in bivalve mollusc fishingregions is a problem that has repercussions for both fishermenand for the economy of the affected region, as these microalgaeproduce toxins that affect humans, ranging from gastrointestinalproblems to, in more extreme cases, cancer that can lead to thedeath of the consumer. Currently, in Santa Catarina, the water isanalyzed to identify the presence of toxins by the Integrated Companyof Agricultural Development of Santa Catarina (CIDASC). Thepresence of toxins in the water creates a temporary embargo onthe sale of mollusks. This embargo usually produces great loss inthe bivalve mollusc culture as far as all the production needs do bediscarded. This work creates a sample collection system that canbe performed by growers rather than experts for the acquisition ofthose samples. These work aims to create an easy-to-use systemenabling the mariculturist to sample water. The purposed processallows the acceleration of the sample collection and analysys. Themanual process needs an expert to come to the field, collect samples,document the samples and take to the lab to analyze. In thisstudy we created an embedded system for sample collection thatautomated the collect field data and link to a image collected bya portable microscope and when a wifi connection is detected itsends the sample to a data server.
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Aleksandrov, Sergey, Sergey Aleksandrov, Julia Gorbunova, and Julia Gorbunova. "CLIMATE CHANGE: HOW DOES THIS INFLUENCE ON ECOSYSTEM HEALTH IN THE LAGOON OF THE BALTIC SEA?" In Managing risks to coastal regions and communities in a changing world. Academus Publishing, 2017. http://dx.doi.org/10.21610/conferencearticle_58b4316a72251.

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Lagoons are one of the most vulnerable ecosystems to impacts of natural environmental and anthropogenic factors. The Curonian and Vistula Lagoons are one of the largest lagoons of Europe. The Curonian Lagoon is choke mostly freshwater, while the Vistula Lagoon is restricted brackish water. Hydrological, chemical and biological researches were carried out monthly since 1991 to 2014. Reductions of nutrients loading in 1990s did not result in improvement of the ecological situation. Hydrological and chemical parameters are the main factors that influence on the algal blooms and ecosystem health in these lagoons. The Curonian Lagoon may be characterized as hypertrophic water body with "poor" water quality. Climate change in 1990s-2010s combined with other factors (freshwater, slow-flow exchange, high nutrients concentrations) creates conditions for Cyanobacteria “hyperblooms”. Harmful algal blooms result in deterioration of the water chemical parameters and death of fish. "Hyperblooms" is the most dangerous for coastal towns and tourist resorts (UNESCO National Park "Curonian Spit"). Climate change in 1990s-2000s have been also observed in Vistula Lagoons (mean annual temperature increased by 1.4°C for 40 years), but brackish water prevent harmful algal hyperblooms. After the invasion of the filter-feeding mollusk Rangia water quality was significantly improved in 2011-2014, but ecosystem productivity remained at a stable long-term level.
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Aleksandrov, Sergey, Sergey Aleksandrov, Julia Gorbunova, and Julia Gorbunova. "CLIMATE CHANGE: HOW DOES THIS INFLUENCE ON ECOSYSTEM HEALTH IN THE LAGOON OF THE BALTIC SEA?" In Managing risks to coastal regions and communities in a changing world. Academus Publishing, 2017. http://dx.doi.org/10.31519/conferencearticle_5b1b93942cc882.47943475.

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Lagoons are one of the most vulnerable ecosystems to impacts of natural environmental and anthropogenic factors. The Curonian and Vistula Lagoons are one of the largest lagoons of Europe. The Curonian Lagoon is choke mostly freshwater, while the Vistula Lagoon is restricted brackish water. Hydrological, chemical and biological researches were carried out monthly since 1991 to 2014. Reductions of nutrients loading in 1990s did not result in improvement of the ecological situation. Hydrological and chemical parameters are the main factors that influence on the algal blooms and ecosystem health in these lagoons. The Curonian Lagoon may be characterized as hypertrophic water body with "poor" water quality. Climate change in 1990s-2010s combined with other factors (freshwater, slow-flow exchange, high nutrients concentrations) creates conditions for Cyanobacteria “hyperblooms”. Harmful algal blooms result in deterioration of the water chemical parameters and death of fish. "Hyperblooms" is the most dangerous for coastal towns and tourist resorts (UNESCO National Park "Curonian Spit"). Climate change in 1990s-2000s have been also observed in Vistula Lagoons (mean annual temperature increased by 1.4°C for 40 years), but brackish water prevent harmful algal hyperblooms. After the invasion of the filter-feeding mollusk Rangia water quality was significantly improved in 2011-2014, but ecosystem productivity remained at a stable long-term level.
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Tokmakova, A. S., E. E. Prokhorova, M. K. Serebryakova, and G. L. Ataev. "FUNCTIONAL ACTIVITY OF HEMOCYTES OF PULMONARY MOLLUSCS." In V International Scientific Conference CONCEPTUAL AND APPLIED ASPECTS OF INVERTEBRATE SCIENTIFIC RESEARCH AND BIOLOGICAL EDUCATION. Tomsk State University Press, 2020. http://dx.doi.org/10.17223/978-5-94621-931-0-2020-38.

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Hemocytes, the cell of the hemolymph, play a key role in the immune response of pulmonate molluscs to various pathogens including trematode infection. The number of hemocytes is known to increase after immunization but the mechanism of their multiplication remains debatable. In this work we studied the functional and proliferative activity of hemocytes in two species of pulmonate molluscs: Biomphalaria glabrata, Planorbarius corneus. ImageStream technique was used for the study of the hemocyte populations of these molluscan species for the first time. The hemocytes of all the studied species were represented by two main types, granular cells and hyalinocytes. Microscopic and flow-cytometric study of the hemocytes with the use of EdU revealed some EdU-positive cells. However, the analysis of the cell cycle of the hemocytes showed that the amount of DNA in these cells was not increased.
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Kirkwood, Keith M., George Bell, Alan M. Kuzirian, Roger T. Hanlon, and Eric D. Wetzel. "Mechanics of the Cephalopod Chromatophore Layer: Structural Characterization of Cephalopod Chromatophores." In ASME 2011 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2011. http://dx.doi.org/10.1115/sbc2011-53073.

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Cephalopods are a class of mollusks that include cuttlefish, octopus, and squid1 that are capable of adaptive display capabilities. The cephalopods unique adaptable appearance is enabled by a sequence of thin layers in their soft and stretchable skin2 that allows them to quickly change color (Figure 1a), pattern, iridescence and texture (with the exception of the squid)3. Two layers in the skin are responsible for this remarkable ability (Figure 1b). The chromatophore layer, located beneath the transparent epidermis layer, is a layer of thousands of pigmented chromatophore organs that are yellow, red, or brown. Below this layer is a sequence of structural reflectors called iridophores that reflect spectra from near-IR to short-wavelength blues and greens1,4. The combination of chromatophore pigments and structural reflectors allows the cephalopod to display dynamic patterning in complex combinations of color, iridescence, brightness, and polarity. The design of the chromatophore organs and the dermal layer are the focus of this investigation.
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Goryachkin, Yuri, and Yuri Goryachkin. "COASTAL EROSION IN THE GULF OF KALAMITA AS A RESULT OF LONG-TERM ANTHROPOGENIC INFLUENCE." In Managing risks to coastal regions and communities in a changing world. Academus Publishing, 2017. http://dx.doi.org/10.21610/conferencearticle_58b431522def4.

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The Gulf of Kalamita is located in the Black Sea off the west coast of the Crimea and is known to be a major recreational area. However, in the last 30 years, its famous sandy beaches have drastically degraded. Degradation of sandy beaches was expressed in erosion of the coastal line (30-70 m) and reduction of the total area of beaches; disappearance of sand in a number of ar-eas in the near-shore zone and openings of marl; sharp increase of fragments of limestone in the composition of beaches. In the last 60 years, the level of the Black Sea has risen by 14 cm. Only this factor, as the calculations show, has caused about 15 mln m3 deficiency of deposits. Accord-ing to direct observations, shoreline response to changes in the sea level at the inter-annual scale changes comproses 0,3 m per 1 cm. Climate changes in trajectories of passing cyclones have resulted in a 2-3 times increase in storm activity over the past 30 years. The contribution of natural factors into the shoreline changes do not exceed 10-15% according to our estimates. The main contribution is related to the background and point anthropogenic impacts. The first group includes overall reduction of sediment in the sea due to construction of reservoirs, cliffs closing with concrete embankments, reducing populations of benthic mollusks for various rea-sons, etc. The second group includes construction of hydraulic structures which do not address lithodynamics peculiarities in particular stretches of coastline.
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Goryachkin, Yuri, and Yuri Goryachkin. "COASTAL EROSION IN THE GULF OF KALAMITA AS A RESULT OF LONG-TERM ANTHROPOGENIC INFLUENCE." In Managing risks to coastal regions and communities in a changing world. Academus Publishing, 2017. http://dx.doi.org/10.31519/conferencearticle_5b1b93fc632f56.50816381.

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The Gulf of Kalamita is located in the Black Sea off the west coast of the Crimea and is known to be a major recreational area. However, in the last 30 years, its famous sandy beaches have drastically degraded. Degradation of sandy beaches was expressed in erosion of the coastal line (30-70 m) and reduction of the total area of beaches; disappearance of sand in a number of ar-eas in the near-shore zone and openings of marl; sharp increase of fragments of limestone in the composition of beaches. In the last 60 years, the level of the Black Sea has risen by 14 cm. Only this factor, as the calculations show, has caused about 15 mln m3 deficiency of deposits. Accord-ing to direct observations, shoreline response to changes in the sea level at the inter-annual scale changes comproses 0,3 m per 1 cm. Climate changes in trajectories of passing cyclones have resulted in a 2-3 times increase in storm activity over the past 30 years. The contribution of natural factors into the shoreline changes do not exceed 10-15% according to our estimates. The main contribution is related to the background and point anthropogenic impacts. The first group includes overall reduction of sediment in the sea due to construction of reservoirs, cliffs closing with concrete embankments, reducing populations of benthic mollusks for various rea-sons, etc. The second group includes construction of hydraulic structures which do not address lithodynamics peculiarities in particular stretches of coastline.
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Reports on the topic "Thais (Mollusks)"

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Tweet, Justin S., Vincent L. Santucci, Kenneth Convery, Jonathan Hoffman, and Laura Kirn. Channel Islands National Park: Paleontological resource inventory (public version). National Park Service, September 2020. http://dx.doi.org/10.36967/nrr-2278664.

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Channel Island National Park (CHIS), incorporating five islands off the coast of southern California (Anacapa Island, San Miguel Island, Santa Barbara Island, Santa Cruz Island, and Santa Rosa Island), has an outstanding paleontological record. The park has significant fossils dating from the Late Cretaceous to the Holocene, representing organisms of the sea, the land, and the air. Highlights include: the famous pygmy mammoths that inhabited the conjoined northern islands during the late Pleistocene; the best fossil avifauna of any National Park Service (NPS) unit; intertwined paleontological and cultural records extending into the latest Pleistocene, including Arlington Man, the oldest well-dated human known from North America; calichified “fossil forests”; records of Miocene desmostylians and sirenians, unusual sea mammals; abundant Pleistocene mollusks illustrating changes in sea level and ocean temperature; one of the most thoroughly studied records of microfossils in the NPS; and type specimens for 23 fossil taxa. Paleontological research on the islands of CHIS began in the second half of the 19th century. The first discovery of a mammoth specimen was reported in 1873. Research can be divided into four periods: 1) the few early reports from the 19th century; 2) a sustained burst of activity in the 1920s and 1930s; 3) a second burst from the 1950s into the 1970s; and 4) the modern period of activity, symbolically opened with the 1994 discovery of a nearly complete pygmy mammoth skeleton on Santa Rosa Island. The work associated with this paleontological resource inventory may be considered the beginning of a fifth period. Fossils were specifically mentioned in the 1938 proclamation establishing what was then Channel Islands National Monument, making CHIS one of 18 NPS areas for which paleontological resources are referenced in the enabling legislation. Each of the five islands of CHIS has distinct paleontological and geological records, each has some kind of fossil resources, and almost all of the sedimentary formations on the islands are fossiliferous within CHIS. Anacapa Island and Santa Barbara Island, the two smallest islands, are primarily composed of Miocene volcanic rocks interfingered with small quantities of sedimentary rock and covered with a veneer of Quaternary sediments. Santa Barbara stands apart from Anacapa because it was never part of Santarosae, the landmass that existed at times in the Pleistocene when sea level was low enough that the four northern islands were connected. San Miguel Island, Santa Cruz Island, and Santa Rosa Island have more complex geologic histories. Of these three islands, San Miguel Island has relatively simple geologic structure and few formations. Santa Cruz Island has the most varied geology of the islands, as well as the longest rock record exposed at the surface, beginning with Jurassic metamorphic and intrusive igneous rocks. The Channel Islands have been uplifted and faulted in a complex 20-million-year-long geologic episode tied to the collision of the North American and Pacific Places, the initiation of the San Andreas fault system, and the 90° clockwise rotation of the Transverse Ranges, of which the northern Channel Islands are the westernmost part. Widespread volcanic activity from about 19 to 14 million years ago is evidenced by the igneous rocks found on each island.
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