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Academic literature on the topic 'Terrestrial molluscs'

Author: Grafiati

Published: 14 March 2023

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Journal articles on the topic "Terrestrial molluscs"

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Čejka, Tomáš, Luboš Beran, Jaroslav Č. Hlaváč, Michal Horsák, Lucie Juřičková, Juraj Čačaný, Jana Buďová, et al. "Měkkýši Hostýnských vrchů [Molluscs of the Hostýnské vrchy Hills]." Malacologica Bohemoslovaca 17 (March 14, 2018): 17–27. http://dx.doi.org/10.5817/mab2018-17-17.

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This study deals with the molluscan fauna of the Hostýnské vrchy Hills (Central Moravia, Czech Republic). The main goal was to make a systematic inventory of the molluscan fauna in this area. Snails were collected in September 2010 by hand picking and litter sampling at selected sites. Final database was pooled with earlier published and unpublished data. In total, 85 terrestrial and 20 freshwater mollusc species were recorded at 56 study sites across the area during 2000–2010. Terrestrial snails Monachoides incarnatus, Punctum pygmaeum, Vitrina pellucida, and freshwater molluscs Pisidium casertanum, and Radix labiata were the most frequently recorded species. The land snails Daudebardia brevipes, Eucobresia nivalis, Vitrea transsylvanica, and Chondrula tridens are notable species from the local viewpoint. The clausilid Vestia ranojevici moravica, an endemic subspecies that colonized some regions of Moravia during the Holocene climatic optimum, is an iconic mollusc species in the area, deserving high conservation priority.

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Shepeleva, I. P. "Vitreous body of the camera-like eyes of terrestrial gastropod mollusks (Heterobranchia, Stylommatophora)." Ruthenica, Russian Malacological Journal 31, no. 2 (April 1, 2021): 93–104. http://dx.doi.org/10.35885/ruthenica.2021.31(2).5.

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Using the methods of light and electron microscopy, the morphological properties were studied, and the evolutionary changes in the vitreous body of the camera-like eyes of some species of terrestrial gastropod pulmonate molluscs were traced. It was demonstrated that all the considered properties of the vitreous body of molluscs are typical for terrestrial pulmonates. In the course of evolution, as a result of the land development by mollusks, the properties of their vitreous body have hardly changed.

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Dhora, D. "Mollusks of Albania." Archives of Biological Sciences 61, no. 3 (2009): 537–53. http://dx.doi.org/10.2298/abs0903537d.

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The checklist of Albanian mollusks contain 745 species: 345 species of marine molluscs of the Adriatic and Jonian seas, 156 species of freshwater mollusks (included the species of Shkodra, Ohrid and Prespa lakes) and 244 species of terrestrial molluscs, are registered in separate lists. The overview of Albanian mollusks is principally based on the numerous previous lists. It is adjourned with new data from recent publications. Some species, found for the first time in Albania, have been collected during our most recent investigations.

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Subba, Bharat Raj, and Tapan Kumar Ghosh. "Report on Some Terrestrial Molluscs from Different Regions of Nepal." Journal of Natural History Museum 23 (June 4, 2009): 78–81. http://dx.doi.org/10.3126/jnhm.v23i0.1842.

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Nine species of terrestrial molluscs were collected at eastern, mid western and far western regions of Nepal. The documented molluscan samples are represented with 4 families under three orders. Out of the total record of nine species, four species belonged to the family Ariophantidae, three species to Subulinidae, one species to Bradybaenidae and one to Veronicellidae.Key Words: Molluscs; Nepal; record; species; terrestrialJournal of Natural History Museum Vol. 23, 2008 Page 78-81

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MORLEY, N. J. "Aquatic molluscs as auxiliary hosts for terrestrial nematode parasites: implications for pathogen transmission in a changing climate." Parasitology 137, no. 7 (April 14, 2010): 1041–56. http://dx.doi.org/10.1017/s0031182010000016.

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SUMMARYNematodes are common parasites of molluscs but are often overlooked. Both metastrongyloid and rhabditoid species dominate the fauna within land snail and slug populations. Nevertheless, a key characteristic of many laboratory studies is the ability of these terrestrial nematodes to utilize aquatic molluscs as auxiliary hosts. The significance of this to the ecology of the parasite has never been evaluated. There is increasing concern as to the impact of climate change on the epidemiology of many parasitic diseases. In particular, it has been suggested that host switching may increase under the pressure of extreme climatic conditions. It is therefore timely to assess the role that aquatic molluscs may play in transmitting terrestrial nematodes, which include species of medical and veterinary importance such as Angiostrongylus cantonensis, A. vasorum, and Muellerius capillaris. The present review assesses the mechanisms of terrestrial nematode transmission through aquatic molluscs focusing on metastrongyloid and rhabditoid species, the importance of variable susceptibility of molluscan hosts, field studies on natural occurrence within aquatic habitats, and the impact of extreme climatic events (floods and droughts) that may increase in frequency under climate change.

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Shepeleva, I. P. "Morphological and optical properties and evolutionary changes of the eye lenses of terrestrial gastropod molluscs (Pulmonata, Stylommatophora)." Ruthenica, Russian Malacological Journal 28, no. 1 (March 2, 2018): 33–38. http://dx.doi.org/10.35885/ruthenica.2018.28(1).5.

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Morphological and optical properties were studied and also evolutionary changes of the eye lenses of some species of terrestrial gastropod pulmonate molluscs were traced. It was demonstrated that all examined properties of the lenses are typical for terrestrial pulmonates. In the course of evolution due to habitat shift by mollusks the lenses were changed only slightly.

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Mwitondi, Musa S., Albert S. Mjandwa, and Pastory M. Bushozi. "Mollusc Shells from Neolithic Contexts in the Lake Eyasi Basin, Northern Tanzania." Tanzania Journal of Science 47, no. 3 (August 14, 2021): 1086–101. http://dx.doi.org/10.4314/tjs.v47i3.19.

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The study of the Neolithic period in the Lake Eyasi Basin was dominated by attempts to formulate the area’s chronology, mobility, settlement patterns, subsistence, and cultural capabilities of Neolithic people as attested by domesticated animals, pottery, and lithic artefacts. Occasionally, studies on molluscs were mentioned, but rarely described in detail. Neolithic sites across the Lake Eyasi Basin have yielded remains of both terrestrial (gastropods) and freshwater mollusc shells (mussels). The abundance of mollusc shell remains in the archaeological records of the Lake Eyasi Basin have played a great role in chronological settings, mobility and community integrations, studies of settlement patterns, and other analyses. Mollusc remains have often been widely interpreted as a food supplement to other reliable food resources such as meat, vegetables and fish. Archaeological excavations and detailed analysis of the shells from Mumba rock shelter, Jangwani 3 and Laghangasimjega 2 have shown that molluscs played different roles. They were effectively used in tool manufacturing, as practical implements for handling objects, as scraping tools, as harpoons for fishing weapons, and sometimes for symbolism and in rituals. Terrestrial and freshwater molluscs coexisted in the Lake Eyasi Basin and were utilised equally by the Neolithic people during the Mid-Holocene period. Keywords: Mollusc shells; Neolithic; Lake Eyasi Basin; Northern Tanzania

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Do Duc, Sang, Son Nguyen Thanh, and Hue Nguyen Thi. "ANNOTATED CHECKLIST OF THE TERRESTRIAL MOLLUSCS (MOLLUSCA: GASTROPODA) FROM DONG VAN DISTRICT, HA GIANG PROVINCE, VIETNAM." Journal of Science Natural Science 66, no. 2 (June 2021): 162–76. http://dx.doi.org/10.18173/2354-1059.2021-0039.

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An annotated checklist of the terrestrial molluscs from Dong Van District is presented. The checklist combines data from all material collected from March 2018 to December 2020 and previous studies. The checklist provides an overview of the diversity of the terrestrial molluscs occurring in the Dong Van area. A total of 59 species representing 16 families are documented. Three species (or 5.08%) of these species are endemic to Ha Giang Province. A species recorded for Northern Vietnam and 28 species of the terrestrial molluscs for Ha Giang Province are herein published for the first time. We also briefly discuss the extent of diversity and endemism in the terrestrial molluscs of the Dong Van area.

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Guerino, L. R., J. F. Carvalho, L. A. Magalhães, and E. M. Zanotti-Magalhães. "Susceptibility of Biomphalaria glabrata submitted to concomitant infection with Angiostrongylus costaricensis and Schistosoma mansoni." Brazilian Journal of Biology 77, no. 3 (September 26, 2016): 451–58. http://dx.doi.org/10.1590/1519-6984.15215.

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Abstract The easy adaptation of Angiostrongylus costaricensis, nematode responsible for abdominal angiostrongyliasis to several species of terrestrial and freshwater molluscs and the differences observed in the interactions of trematodes with their intermediate hosts have induced us to study the concomitant infection of Biomphalaria glabrata with Schistosoma mansoni and A. costaricensis. Prior exposure of B. glabrata to A. costaricensis (with an interval of 48 hours), favored the development of S. mansoni, observing higher infection rate, increased release of cercariae and increased survival of molluscs, when compared to molluscs exposed only to S. mansoni. Prior exposure of B. glabrata to A. costaricensis and then to S. mansoni also enabled the development of A. costaricensis since in the ninth week of infection, higher amount of A. costaricensis L3 larvae was recovered (12 larvae / mollusc) while for molluscs exposed only to A. costaricensis, the number of larvae recovered was lower (8 larvae / mollusc). However, pre-exposure of B. glabrata to S. mansoni (with an interval of 24 hours), and subsequently exposure to A. costaricensis proved to be very harmful to B. glabrata, causing extensive mortality of molluscs, reduced pre-patent period to release cercariae and greater recovery of L3 A. costaricensis larvae.

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Inkhavilay, Khamla, Chirasak Sutcharit, Ueangfa Bantaowong, Ratmanee Chanabun, Warut Siriwut, Ruttapon Srisonchai, Arthit Pholyotha, Parin Jirapatrasilp, and Somsak Panha. "Annotated checklist of the terrestrial molluscs from Laos (Mollusca, Gastropoda)." ZooKeys 834 (April 3, 2019): 1–166. http://dx.doi.org/10.3897/zookeys.834.28800.

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The land area of Laos is composed of a large variety of undisturbed habitats, such as high mountainous areas, huge limestone karsts and the lower Mekong Basin. Therefore, Laos is expected to have a high species diversity, especially for the land snails. However, with respect to research on malacology, Laos is probably the least well-researched area for land snail diversity in Indochina (including Laos) over the past few centuries. The handful of species lists have never been systematically revised from the colonial period to the present, so these classifications are outdated. Herein we present the first comprehensive annotated checklist with an up-to-date systematic framework of the land snail fauna in Laos based on both field investigations and literature surveys. This annotated checklist is collectively composed of 231 nominal species (62 ‘prosobranch’ and 169 heterobranches), of which 221 nominal species are illustrated. The type specimens of 143 species from several museum collections and/or 144 species of newly collected specimens are illustrated. There are 58 species recorded as new to the malacofauna of the country, and two new replacement names are proposed as Hemiplectalanxangnica Inkhavilay and Panha, nomen novum (Ariophantidae) and Chloritiskhammouanensis Inkhavilay and Panha, nomen novum (Camaenidae). Four recently described species of the genus Amphidromus from Laos, “thakhekensis”, “richgoldbergi”, “attapeuensis” and “phuonglinhae” are synonymized with previously described species. In addition, thirteen nominal species are listed as uncertain records that may or may not occur in Laos. This annotated checklist may inspire malacologists to carry on systematic research in this region.

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Dissertations / Theses on the topic "Terrestrial molluscs"

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Perry, R. J. O. "Shell size and population density in terrestrial molluscs." Thesis, University of Sunderland, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234753.

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Hill, Evan Anthony. "Radiocarbon dating of terrestrial molluscs in North East Libya." Thesis, Queen's University Belfast, 2015. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.680076.

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This thesis investigates the potential of using terrestrial molluscs for radiocarbon dating of archaeological sediments. The sequence at the Haua Fteah, Cyrenaica, in Libya provides a case study. Two strands of study were undertaken as part of the ERC funded Cyrenaica Prehistory Project: the examination of the present day radiocarbon ecology of species in the region; and an analysis of archaeological shell from the Haua Fteah cave with the aim of developing a high-resolution chronology for the upper portions of the site. Previously, the dating for many of the key lithic technological phases in the region has been reliant on a patchwork of sites which were anchored by relatively poor dating on a very small number of long sequences, of which the Haua Fteah is one of the most significant. Based on the findings of the modern study, an age offset of 584 ± 170 14C years BP was adopted for the correction of the shell reservoir effect in archaeological Helix melanostoma.The radiocarbon dating of archaeological shell from the Haua Fteah and Hagfet et Gama at a very high stratigraphic resolution found that a complex chronological pattern wf=ls present, with frequent dating reversals through the late quaternary sequence. The high resolution dating of the Late Pleistocene and Early Holocene archaeological sequence in the Haua Fteah provides the first truly detailed chronological analysis of the stratigraphy within the cave and has significantly improved our understanding of the relationship between key archaeological phases (Mousterian/MSA, Dabban/Upper Palaeolithic, Oranian and Capsian/Epipalaeolithic and Neolithic) at this site. It can therefore be concluded that the radiocarbon dating of archaeological shell has great promise when underpinned by radiocarbon ecological assessment of target species.

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Warrington, Anita Glasgow. "Stable isotopes of carbon and oxygen in the shells of terrestrial molluscs." Thesis, University of Liverpool, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.316976.

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Silva, M. T. "Food selection by terrestrial molluscs and its ecological consequences for plant communities." Thesis, University of Southampton, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.371149.

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BARBATO, DEBORA. "Biodiversity and ecology of Tuscan malacocoenoses with particular reference to the effects of human impact." Doctoral thesis, Università di Siena, 2017. http://hdl.handle.net/11365/1005561.

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For the most part, there is no doubt that human impact on biodiversity has been negative: habitat loss and degradation, pollution, overexploitation, and introduction of invasive species had played significant roles in biodiversity decline. However, human impact on Earth is not always so detrimental and its effects are not the same for all taxa. The aim of this thesis was to assess the anthropogenic impact on one of the most endangered and often unnoticed groups - terrestrial molluscs - firstly focusing on natural and then urban context. In Chapter I, effects of forest age as a surrogate for forest continuity on land snail richness and composition in Tuscan evergreen and deciduous woods were assessed. Chapter II explored the role of dispersal and local environment in urban land snail assemblages comparing different human-made habitat types in three cities in central Italy (Grosseto, Siena and Arezzo). Finally the link between man and urban environment has been further elaborated in Chapter III, where a fully synanthropic land snail species (Papillifera papillaris) has been used to assess athmosferic pollution from human activities, especially vehicular traffic, in the urban area of Siena. Concerning results obtained, Chapter I revealed that successional age as surrogate for forest continuity parameter seemed not to be a key factor in controlling land snail species richness and abundances but habitat structure more than forest age was the factor mostly involved in affecting communities; furthermore, no difference was found between evergreen and deciduous oak litter in terms of land snail richness, abundance and diversity. Focusing on urban environment, Chapter II demonstrated that cities can show relatively high land snail richness with values comparable to natural areas. After having accounted and later removed spatial structures influence, urban gradient effect turned out to be the principal component structuring urban land snail assemblages. This finding proved a likely human-mediated transport, which enhances dispersal abilities of organisms normally considered scarcely mobile. However, no establishment there would be in the absence of suitable microhabitat conditions. In particular, “vegetation cover” and “distance from the city centre” were the environmental variables that explained most of the variation in species composition. In Chapter III, results elected Papillifera papillaris a promising species to monitor the metal distribution and bioavailability in urban environments and to evaluate the possible transfer of pollutants to higher levels in food chains. Mollusc soft tissues showed very low concentrations of lithophile elements, and much higher concentrations of anthropogenic metals such as Cd, Cu, Pb, and Zn while excreta and traditional biomonitors such as mosses were the matrices most involved in lithophile contamination. Surprisingly, Papillifera papillaris tissues showed extreme Mn values. These concentations, for their magnitude, have no comparison with those reported in literature for other species of terrestrial gastropods. Excreta showed a high concentration of Pb, demonstrating the scarce bioavailability and absorption of this element and probably its limited impact on urban food chains.

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Hall, Christopher Michael. "Investigation of effects of exposure to sewage sludge on terrestrial molluscs through analysis of changes in population structure, tissue accumulation, histology and proteomics." Thesis, University of Aberdeen, 2010. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=158308.

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Endocrine disrupting compounds (EDCs) together with potentially toxic metals (PTMs), are present in large amounts in sewage sludge which was used as a tool to expose terrestrial molluscs to environmental concentrations of these pollutants. Pastures fertilised with sewage sludge had significantly fewer adult slugs collected per replicate (C: 58.4; T: 26.2; S.E.D. 0.14; p<.05) and eggs (C: 16.6; T: 9.1; S.E.D. 0.17; p<0.05). No differences with treatment, in tissue concentrations of EDCs or PTMs or in hepatopancreas or gonad structure, were detected. However, hepatopancreatic proteins (cyclophilin, paramyosin and trypsin) were significantly altered (p<0.01). In a laboratory study, exposure, via feed, to 0x (Control), 1x (T1), 10x (T2) or 110x (T3) the environmental dose of sludge extract resulted in a dose-related increase in mean mortality rates (relative to controls) in adult slugs (Deroceras reticulatum). Exposure for 3 weeks induced no measurable differences in tissue pollutant concentrations or hepatopancreas or gonad histology. Fewer slug eggs exposed to sludge and/or dehydration (2x2; 10 eggs/replicate); hatched following sludge exposure (C hydrated 64.5%;T hydrated 24.5%; p<0.05; S.E.D. 2.169; C dehydrated 48.9%; T dehydrated 17.4%; p<0.05; S.E.D. 4.256) but not following dehydration. There was no significant interaction between sludge exposure and dehydration but survival was lowest in animals exposed to both. Slug behaviour was affected by exposure to sludge, including increasing avoidance and huddling behaviours. The results indicate that terrestrial molluscs may be used as invertebrate sentinels to assess the effects of ECD and PTM exposure.

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Romero, Pedro [Verfasser], Markus [Akademischer Betreuer] [Gutachter] Pfenninger, and Imke [Gutachter] Schmitt. "Evolution of the terrestrial invasion in Panpulmonata (Mollusca, Gastropoda): molecular adaptations in the context of realm transitions / Pedro Romero ; Gutachter: Markus Pfenninger, Imke Schmitt ; Betreuer: Markus Pfenninger." Frankfurt am Main : Universitätsbibliothek Johann Christian Senckenberg, 2017. http://d-nb.info/1138276863/34.

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Pilate, Vinícius José. "Comportamento e ciclo de vida de Dysopeas muibum Marcus & Marcus, 1968 (Mollusca, Subulinidae) em laboratório: efeitos do isolamento e do fotoperíodo sobre padrões de crescimento, reprodução, mortalidade e conquiliomorfometria." Universidade Federal de Juiz de Fora, 2013. https://repositorio.ufjf.br/jspui/handle/ufjf/1487.

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O conhecimento dos aspectos biológicos, morfológicos e comportamentais dos moluscos terrestres é importante para o desenvolvimento de medidas de controle de pragas e de estratégias de conservação de espécies. O presente trabalho teve como objetivo caracterizar os padrões de biologia, conquiliomorfometria e comportamento da espécie Dysopeas muibum e verificar os efeitos do isolamento e do fotoperíodo sobre seu ciclo de vida e a morfometria da concha, em condições de laboratório. Foi realizado o acompanhamento do crescimento da concha, da liberação de filhotes e da mortalidade de 160 moluscos, dos quais 40 foram mantidos isolados e 120 agrupados (10 moluscos por grupo; 40 em condições naturais de temperatura, umidade relativa do ar e fotoperíodo, e 80 tendo estas condições controladas – 40 com dias longos e 40 com dias curtos), desde o nascimento até 180 dias de vida, quando então foram aferidas as medidas da concha. Para verificar o horário de atividade e compor o etograma, 30 moluscos adultos (10 moluscos por grupo) foram observados durante 24 horas contínuas, através do método de varredura, com registro dos atos comportamentais a intervalos de 20 minutos. Já para verificar a ocorrência de agregação e a preferência por sítio de repouso, durante cinco dias, a intervalos de 24 horas, foram observados de 30 moluscos adultos (10 moluscos por grupo): número de agregações, de indivíduos agregados e isolados, e de indivíduos sob o disco com alimento, sob o disco sem alimento, sobre o substrato, enterrados e na parede do terrário. Para todas as análises, os moluscos foram criados em terrários plásticos vedados com tecido de algodão e elástico, contendo como substrato terra vegetal esterilizada e umedecida com água de torneira, e alimentados com ração para frangos de corte enriquecida com carbonato de cálcio. Foi verificado que a espécie ocorre no município de Juiz de Fora, Minas Gerais, possui parte mole amarelada e concha pequena e alongada, e é capaz de se reproduzir por autofecundação. Possui crescimento indeterminado, fecundidade aumentando com o tamanho corporal, iteroparidade e baixa mortalidade antes e após a maturidade sexual, não tendo o fotoperíodo efeito sobre esses padrões. As condições controladas de temperatura, umidade relativa do ar e fotoperíodo favoreceram o crescimento, maiores valores conquiliomorfométricos e o rápido alcance da maturidade sexual, enquanto a diminuição do comprimento do dia favoreceu a fecundidade. O isolamento aumentou o número total de filhotes, o número de filhotes por molusco parental e o intervalo entre eventos reprodutivos, reduziu o número de eventos reprodutivos e de filhotes por evento, e não influenciou o crescimento, o alcance da maturidade sexual, a relação crescimento-reprodução, a mortalidade e a conquiliomorfometria. O etograma foi composto por oito atos comportamentais: repousar, estar enterrado, deslocar, enterrar, explorar, alimentar, emergir e interagir. A espécie apresentou maior tendência ao repouso e a locomoção foi o ato comportamental de atividade prevalente, não apresentou horário de atividade predominantemente noturno e comportamento agregativo, e seu sítio preferido para o repouso foi o enterramento no substrato.
Knowledge of biological, morphological and behavioral characteristics of terrestrial molluscs is important for the development of pest control measures and strategies for the conservation of species. This study aimed to characterize the patterns of biology, conchiliomorphometric and behavior of the species Dysopeas muibum and check the effects of isolation and photoperiod on its life cycle and shell morphometry, under laboratory conditions. We conducted monitoring growth of the shell, release of puppies and mortality of 160 molluscs, of which 40 were kept isolated and 120 grouped (10 molluscs per group; 40 in natural conditions of temperature, relative humidity and photoperiod, and 80 with controlled conditions – 40 with long days and 40 with short days), from birth to 180 days of life, when the measures of the shell were taken. To check the schedule of activity and compose the ethogram, 30 adult molluscs (10 molluscs per group) were observed for 24 continuous hours, through the scanning method, with a record of behavioral acts at intervals of 20 minutes. For verifying the occurrence of aggregation and the preference for resting place, for five days, at 24 hour intervals, were observed in 30 adult molluscs (10 molluscs per group): number of aggregations, of aggregates and isolated individuals, and of individuals below the disc with food, below the disc without food, on the substrate, buried and in the wall of terrarium. For all analyzes, the molluscs were reared in plastic terrariums sealed with cotton fabric and elastic, containing plant soil sterile and moistened with tap water, and fed with food to broilers enriched with calcium carbonate. It was found that the species occurs in the Juiz de Fora City, MG, Brazil, has the soft yellowish and small and elongated shell, and is able to reproduce by self-fertilization. It has indeterminate growth, fecundity increases with body size, iteroparity and low mortality before and after sexual maturity, not having the photoperiod effect on these patterns. The controlled conditions of temperature, relative humidity and photoperiod favored growth, conchiliomorphometric values higher and fast reach sexual maturity, while the decrease in day length favored fecundity. The isolation increased the total number of pups, number of pups per parent mollusc and the interval between reproductive events, reduced the number of reproductive events and pups per event, and did not influence growth, reach sexual maturity, growth-reproduction relation, mortality and conchiliomorphometric. The ethogram was composed of eight behavioral acts: lie, lie buried, move, bury, explore, food, emerge and interact. The species had a greater tendency to rest and locomotion was the behavioral act prevalent activity, showed no activity time predominantly nocturnal and affiliative behavior, and their favorite place to rest was buried in substrate.

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Rezende, Raquel de Seixas. "Resposta rápida de Leptinaria unilamellata (d’Orbigny, 1835) (Gastropoda: Subulinidae) a condições ambientais, em gerações sucessivas de laboratório: efeito materno e antagonismo entre resistência à dessecação e sucesso reprodutivo." Universidade Federal de Juiz de Fora (UFJF), 2017. https://repositorio.ufjf.br/jspui/handle/ufjf/4775.

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Existem evidências da relação entre morfologia da concha e pressões ambientais. Entretanto, não se sabe, se os mecanismos responsáveis por essa variabilidade da forma da concha seriam decorrentes de uma plasticidade fenotípica, determinação genética ou até mesmo efeito materno. Alguns estudos, abordam apenas os aspectos da concha, desconsiderando a relação entre a morfologia da concha, proteção contra dessecação e reprodução. Neste contexto, o presente estudo teve dois grandes objetivos: o primeiro, verificar se a existência de dois padrões morfológicos (conchas abauladas e conchas alongadas) observados para espécie Leptinaria unilamellata a existência de um antagonismo entre proteção contra dessecação e sucesso reprodutivo. E a segunda pergunta seria: qual o papel da plasticidade fenotípica em relação a esses dois padrões? Para investigar a resposta, foi realizado um estudo morfométrico comparativo entre duas populações em gerações sucessivas de laboratório e quantificado o número de filhotes produzidos por cada indivíduo do primeiro evento reprodutivo em cada geração. Para verificar o efeito da dessecação sobre a morfologia da concha ao longo das gerações sucessivas, os moluscos foram submetidos as duas condições de tratamentos. Os resultados do presente estudo confirmam a hipótese de que as variáveis morfométricas que influenciam a forma da volta corporal e a dimensão da abertura da concha influenciam o sucesso reprodutivo da espécie. Foi observado também que as variáveis morfométricas entre as duas populações se tornaram menos evidentes ao longo das gerações sucessivas de laboratório, evidenciando uma resposta adaptativa rápida de Leptinaria unilamellata, decorrente do efeito materno. A maior produção de filhotes foi observada para população de Chácara em todas as gerações, onde a forma abaulada, determina a presença de volta corporal e aberturas maiores, permitindo uma expansão do oviduto. Os resultados evidenciam também que moluscos com conchas mais alongadas e aberturas menores não investem em filhotes maiores.
There is evidence of the relation between shell morphology and environmental pressures. However, it is not known whether the mechanisms responsible for the shell shape variability results from phenotypic plasticity, genetic determination or even to maternal effect. Some studies address just shell aspects and disregard the relation among shell morphology, protection against desiccation and reproduction. Thus, the present study has two main aims. The first aim is to investigate whether the existence of two morphological patterns (rotund shells and elongate shells) found in Leptinaria unilamellata the antagonism between protection against desiccation and reproductive success. The second one is to find the answer to the following question: what is the role played by phenotypic plasticity in these two patterns? A morphometric study comparing two populations derived from successive laboratory generations was performed to find such answer. In addition, the number of progenies produced by each individual born in the first reproductive event in each generation was quantified. The mollusks were subjected to two treatment conditions to investigate the effect of desiccation on shell morphology over successive generations. The results of the present study confirmed the hypothesis that the morphometric variables influencing the body whorls’ shape and the shell opening size have also influenced the species’ reproductive success. The morphometric variables between the two populations became less evident throughout the successive laboratory generations, thus showing the fast-adaptive response of Leptinaria unilamellata resulting from the maternal effect. The highest progeny production was found in the population of Chácara in all generations, wherein the rotund shape determined the presence of body whorls and larger openings, which enabled oviduct expansion. The results have also shown that mollusks presenting more elongated shells and smaller openings do not invest in large progenies.

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Affenzeller, Susanne [Verfasser], Daniel John [Akademischer Betreuer] Jackson, Daniel John [Gutachter] Jackson, and Gregor [Gutachter] Bucher. "Pigments, Colours and Patterns - The contribution of eumelanin and pheomelanin to molluscan shell ornamentation with a special focus on the terrestrial snail Cepaea nemoralis / Susanne Affenzeller ; Gutachter: Daniel John Jackson, Gregor Bucher ; Betreuer: Daniel John Jackson." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2020. http://d-nb.info/1205544739/34.

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Books on the topic "Terrestrial molluscs"

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Barker, G. M., ed. The biology of terrestrial molluscs. Wallingford: CABI, 2001. http://dx.doi.org/10.1079/9780851993188.0000.

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Barker, G. M., ed. Natural enemies of terrestrial molluscs. Wallingford: CABI, 2004. http://dx.doi.org/10.1079/9780851993195.0000.

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M, Barker G., ed. The biology of terrestrial molluscs. Wallingford, UK: CABI Pub., 2001.

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M, Barker G., ed. Natural enemies of terrestrial molluscs. Wallingford, Oxfordshire, UK: CABI Pub., 2004.

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Gärdenfors, Ulf. Impact of airborne pollution on terrestrial invertebrates: With particular reference to molluscs. Solna: National Swedish Environment Protection Board, 1987.

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Land and freshwater molluscs of Brazil: An illustrated inventory on the Brazilian malacofauna, including neighbor regions of the South America, respect to the terrestrial and freshwater ecosystems. São Paulo, Brazil: Museu de Zoologia, Universidade de São Paulo, 2006.

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Barker, G. M. Naturalised terrestrial Stylommatophora (Mollusca, Gastropoda). Lincoln, Canterbury, N.Z: Manaaki Whenua Press, 1999.

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Museo regionale di scienze naturali (Turin, Italy), ed. Molluschi terrestri e d'acqua dolce della Valle di Susa. Torino: Museo regionale di scienze naturali, 2008.

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Burke, Thomas E. Management recommendations for survey and manage: Terrestrial mollusks. 2nd ed. [Washington, D.C.?]: U.S. Dept. of Agriculture, Forest Service, 1999.

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Gerlach, Justin. Terrestrial and freshwater Mollusca of the Seychelles islands. Leiden, The Netherlands: Backhuys, 2006.

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Book chapters on the topic "Terrestrial molluscs"

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Bailey, S. E. R. "Terrestrial molluscs." In Video Techniques in Animal Ecology and Behaviour, 65–88. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-0699-3_4.

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Port, G. R., D. M. Glen, and W. O. C. Symondson. "Success in Biological Control of Terrestrial Molluscs." In Biological Control: Measures of Success, 133–57. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-011-4014-0_5.

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Wilson, Michael J., and Randy Gaugler. "Terrestrial Mollusc Pests." In Field Manual of Techniques in Invertebrate Pathology, 787–804. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-017-1547-8_35.

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Wilson, Michael J. "Terrestrial mollusc pests." In Field Manual of Techniques in Invertebrate Pathology, 751–65. Dordrecht: Springer Netherlands, 2007. http://dx.doi.org/10.1007/978-1-4020-5933-9_37.

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Panisi, Martina, Ricardo F. de Lima, Jezreel do C. Lima, Yodiney dos Santos, Frazer Sinclair, Leonor Tavares, and David T. Holyoak. "Terrestrial Mollusca of the Gulf of Guinea Oceanic Islands." In Biodiversity of the Gulf of Guinea Oceanic Islands, 407–29. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-06153-0_16.

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AbstractThe oceanic islands of the Gulf of Guinea are known for their remarkable endemic species richness, and the terrestrial Mollusca group is particularly distinctive. This chapter summarizes the exploration and diversity of this group, discussing biogeography, evolution, ecology, and conservation to identify persisting knowledge gaps. Terrestrial malacological studies in the Gulf of Guinea islands started at the end of the eighteenth century but have been intermittent. Recent systematic surveys have continued to find novelties, and the most recent revision lists 96 species, of which 62 are endemic: Príncipe has 40 terrestrial (60% single-island endemic) and five seashore species, São Tomé has 52 terrestrial (50% single-island endemic) and seven seashore species, Annobón has 14 terrestrial species (50% single-island endemic), 3 species are endemic to Príncipe and São Tomé, and 2 are endemic to the three islands. The islands were colonized by diverse “clades” arriving from continental Africa, which is consistent with biogeographical patterns from other taxonomic groups. However, in line with Mollusca dispersal limitations, inter-island colonization seems to be less frequent, while there are multiple cases of speciation within the same island. The land snail assemblage on São Tomé seems to be strongly structured by land-use type: endemics being associated mostly with forest and non-endemics to anthropogenically modified environments. Only 13 species have been recorded across the altitudinal range of São Tomé, suggesting altitude is also essential to determining species distribution. Habitat loss and introduced species are important threats, but so far, only the endemic Archachatina bicarinata has been listed as threatened. Despite recent progress, further studies are still needed to better understand this unique fauna and inform conservation strategies.

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Sokolove, P. G., E. J. McCrone, J. van Minnen, and W. C. Duncan. "Reproductive Endocrinology and Photoperiodism in a Terrestrial Slug." In Ciba Foundation Symposium 104 - Photoperiodic Regulation of Insect and Molluscan Hormones, 189–203. Chichester, UK: John Wiley & Sons, Ltd., 2008. http://dx.doi.org/10.1002/9780470720851.ch12.

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Matsuo, Ryota. "The Computation and Robustness of the Mini-Cognitive Centers of Terrestrial Mollusks: An Exquisite Outcome of Brain Evolution." In Diversity and Commonality in Animals, 101–22. Tokyo: Springer Japan, 2017. http://dx.doi.org/10.1007/978-4-431-56469-0_5.

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Douka, Katerina. "Radiocarbon dating of marine and terrestrial shell." In Molluscs in Archaeology, 381–99. Oxbow Books, 2017. http://dx.doi.org/10.2307/j.ctvh1dk5s.28.

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Colonese, André Carlo. "Stable isotope ecology of terrestrial gastropod shells." In Molluscs in Archaeology, 400–413. Oxbow Books, 2017. http://dx.doi.org/10.2307/j.ctvh1dk5s.29.

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Wilson, Michael J. "Pathogens and parasites of terrestrial molluscs." In Manual of Techniques in Invertebrate Pathology, 427–39. Elsevier, 2012. http://dx.doi.org/10.1016/b978-0-12-386899-2.00013-0.

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Conference papers on the topic "Terrestrial molluscs"

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Prepelita, Afanasie, and Tudor Trifan. "Terrestrial molluscs and paleoecology of prehistoric man living floor in the middle Nistru basin." In International symposium ”Functional ecology of animals” dedicated to the 70th anniversary from the birth of academician Ion Toderas. Institute of Zoology, Republic of Moldova, 2019. http://dx.doi.org/10.53937/9789975315975.57.

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Cherkasova, E. E., G. V. Lavrentyeva, and B. I. Synzynys. "CALCULATION OF THE HALF-YEAR DOSE OF THE TERRESTRIAL MOLLUSK FRUTICICOLA FRUTICUM." In SAKHAROV READINGS 2022: ENVIRONMENTAL PROBLEMS OF THE XXI CENTURY. International Sakharov Environmental Institute of Belarusian State University, 2022. http://dx.doi.org/10.46646/sakh-2022-1-325-328.

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The ecocentric strategy of radiation protection involves the expansion of experimental bases of radiation-induced effects in representatives of biota. This paper presents the calculated values of LD50/60 for the terrestrial mollusk F. fruticum after acute irradiation. To conduct a laboratory experiment, the conditions for keeping animals close to their natural habitat were selected. At the same time the mortality of mollusks in the control group remained at zero during the entire experiment. The calculated method of probit analysis using the least squares method was used to determine the LD50/60 index for F. fruticum mollusk of different age groups. Based on calculations, the LD index is 50/60 for three age groups of land mollusks: 118.7 ± 62.2 Gy, 115.6 ±33.9 Gy and 141.4 ±26.3 Gy for the first, second and third age groups, respectively.

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Komarova, Ekaterina V., Alexander A. Komarov, Elena A. Artemieva, and Tamara G. Stojko. "VARIABILITY OF THE GROUND MOLLUSK SHELL." In Treshnikov readings – 2021 Modern geographical global picture and technology of geographic education. Ulyanovsk State Pedagogical University named after I. N. Ulyanov, 2021. http://dx.doi.org/10.33065/978-5-907216-08-2-2021-30-34.

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The variability of conchiological characters of the shell of the terrestrial mollusk Chondrula tridens (Müller 1774) from 4 different types of landscapes of the Ulyanovsk region was studied. Analysis of elementary characters, proportions and wellhead armament of shell structures demonstrates a significant heterogeneity of the species. The large size of the shell of the snails is explained by an increase in the growth period due to an increase in temperature and humidity in the conditions of the north-western and southern landscapes of the Ulyanovsk region, as well as in the urbanized environment. Reducing the height of the shell, increasing roundness and better development of the mouth teeth of mollusks living in the chalk steppe reflects their adaptability to the conditions of more xerothermic landscapes, and also determines the position of the shell in space.

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Subba, Rachana, and Prosenjit Ghosh. "Use of Clumped carbonate thermometry in terrestrial mollusc from Indian region." In Goldschmidt2022. France: European Association of Geochemistry, 2022. http://dx.doi.org/10.46427/gold2022.9154.

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Feser, Kelsey M., Arnold I. Miller, and Jeanette C. Arkle. "IDENTIFYING TERRESTRIAL CONTROLS ON SPATIAL VARIATION IN MOLLUSCAN DEATH ASSEMBLAGES, ST. CROIX, USVI." In GSA Annual Meeting in Denver, Colorado, USA - 2016. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016am-287058.

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