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Journal articles on the topic 'Island ontogeny'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Valente, Luis M., Rampal S. Etienne, and Albert B. Phillimore. "The effects of island ontogeny on species diversity and phylogeny." Proceedings of the Royal Society B: Biological Sciences 281, no. 1784 (2014): 20133227. http://dx.doi.org/10.1098/rspb.2013.3227.

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A major goal of island biogeography is to understand how island communities are assembled over time. However, we know little about the influence of variable area and ecological opportunity on island biotas over geological timescales. Islands have limited life spans, and it has been posited that insular diversity patterns should rise and fall with an island's ontogeny. The potential of phylogenies to inform us of island ontogenetic stage remains unclear, as we lack a phylogenetic framework that focuses on islands rather than clades. Here, we present a parsimonious island-centric model that inte

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Taylor, Amanda, and Kevin Burns. "Epiphyte community development throughout tree ontogeny: an island ontogeny framework." Journal of Vegetation Science 26, no. 5 (2015): 902–10. http://dx.doi.org/10.1111/jvs.12289.

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3

Vidal-Hosteng, Amandine, Christophe Thébaud, Rampal S. Etienne, and Robin Aguilée. "Effects of archipelago geo-environmental dynamics on phylogenetic tree shape." Frontiers of Biogeography 18 (May 16, 2025): e146650. https://doi.org/10.21425/fob.18.146650.

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In archipelagic environments, the successive emergence and submergence of islands induces changes in area, spatial structure and isolation. Here, we aim to understand how such geo-environmental dynamics, by altering immigration, speciation and extinction over time, may influence phylogenetic patterns. We use a neutral, stochastic, individual-based model which simulates a community evolving in an archipelago where four islands emerge and submerge consecutively. We record each birth, death and immigration event, allowing us to build the complete phylogeny at any time, from which we extract the p

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Gould, Stephen Jay. "Prolonged stability in local populations of Cerion agassizi (Pleistocene-Recent) on Great Bahama Bank." Paleobiology 14, no. 1 (1988): 1–18. http://dx.doi.org/10.1017/s0094837300011763.

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Long-term persistence of patterns in geographic variation within species is an interesting and puzzling phenomenon. I present a well-defined natural experiment in the land snail Cerion agassizi from the islands of Great Bahama Bank. C. agassizi is the best-known fossil of the ca. 120,000 years BP dunes of New Providence, Cat and Eleuthera Islands; populations have survived on Cat and Eleuthera. During the Wisconsin glacial advance, all these islands joined together in an emergent bank. Presence of the same species on two islands at two times permits a test for both time signatures (does change

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Harvey, Michael B., and Irvan Sidik. "REVIEW OF THE MORPHOLOGY OF TRIMERESURUS BROGERSMAI (SERPENTES: CIPERIDAE), A RARE PIVIPER OF SIMEULUE AND THE MENTAWAI ISLANDS, INDONESIA." Treubia 40 (January 29, 2014): 1–8. https://doi.org/10.14203/treubia.v40i0.179.

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Trimeresurus brongersmai is a rare pitviper from Simeulue and the Mentawai Islands. We comment on the morphology and examine new specimens from Siberut Island. The four new specimens differ morphologically from the eight specimens known previously. A distinctive banding pattern on the distal tail characterises T. brongersmai and the related species T. puniceus. Juveniles lack the distinctive projecting supraoculars of adult T. brongersmai and these scales apparently develop during ontogeny. We propose the new term â€œrostronasalâ€ for a large scale positioned between the rostral and nasal on e

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MA, MIN, QING-HAI FAN, and ZHI-QIANG ZHANG. "Ontogenetic changes in the morphology of Eharius chergui (Acari: Phytoseiidae)." Zootaxa 4540, no. 1 (2018): 23. http://dx.doi.org/10.11646/zootaxa.4540.1.5.

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The morphological ontogeny of Eharius chergui (Athias-Henriot, 1960) is described in this paper based on laboratory-reared specimens originating from Marrubium vulgare L. (Lamiaceae) collected in North Island, New Zealand. Malformation was observed in the development of some idiosomal setae in some specimens and was suggested to be related to the host plant M. vulgare.

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Kraemer, Andrew C., Yannik E. Roell, Nate F. Shoobs, Christine E. Parent, and Sandra Nogué. "Does island ontogeny dictate the accumulation of both species richness and functional diversity?" Global Ecology and Biogeography 31, no. 1 (2021): 123–37. http://dx.doi.org/10.1111/geb.13420.

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Aguiar, Aline A., Jean L. Valentin, and Ricardo S. Rosa. "Habitat use by Dasyatis americana in a south-western Atlantic oceanic island." Journal of the Marine Biological Association of the United Kingdom 89, no. 6 (2009): 1147–52. http://dx.doi.org/10.1017/s0025315409000058.

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The present work aims to determine and analyse the distribution of individuals of different size-classes of the southern stingray, Dasyatis americana, in distinct habitats at Fernando de Noronha Archipelago. The stingrays were visually sampled, quantified and described according to a standard protocol through intensive search method during direct observations. The relationships among individuals of various disc length (DL) classes and their habitat features were described by the correspondence analysis. A total of 356 individuals were sampled. Individuals between 15 and 35 cm DL were observed

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Macdonald, Jed I., Russell N. Drysdale, Roman Witt, Zsófia Cságoly, and Guðrún Marteinsdóttir. "Isolating the influence of ontogeny helps predict island-wide variability in fish otolith chemistry." Reviews in Fish Biology and Fisheries 30, no. 1 (2019): 173–202. http://dx.doi.org/10.1007/s11160-019-09591-x.

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10

Henssen, Aino, and G. Kantvilas. "Wawea Fruticulosa, a New Genus and Species from the Southern Hemisphere." Lichenologist 17, no. 1 (1985): 85–97. http://dx.doi.org/10.1017/s0024282985000093.

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AbstractThe monotypic genus Wawea gen. nov. is described as a second genus in the family Arctomiaceae. The single species, Wawea fruticulosa sp. nov., is characterized by its fruticose habit, rugose and corticate lobes, secondarily multidivided and coalescing apothecia, two-celled spores, and by the unique initial stage of ascocarp ontogeny which includes simultaneous development of ascogonia as well as short-celled, branched conldiophores producing conidia. W. fruticulosa is widespread in Tasmania and is known also from New Zealand with single collections from the North and South Island. A ne

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11

Kraemer, A. C., C. W. Philip, A. M. Rankin, and C. E. Parent. "Trade-offs direct the evolution of coloration in Galápagos land snails." Proceedings of the Royal Society B: Biological Sciences 286, no. 1894 (2019): 20182278. http://dx.doi.org/10.1098/rspb.2018.2278.

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Increasingly, multiple selective factors are recognized as jointly contributing to the evolution of morphology. What is not clear is how these forces vary across communities to promote morphological diversification among related species. In this study of Galápagos endemic snails (genus Naesiotus ), we test several hypotheses of colour evolution. We observe mockingbirds (genus Mimus ) predating live snails and find that avian predation selects against conspicuous shells. The evolutionary outcome of this selection is a diversity of shell colours across snails of the archipelago, each closely mat

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12

Courtney Mustaphi, Colin J., and Konrad Gajewski. "Holocene sediments from a coastal lake on northern Devon Island, Nunavut, Canada." Canadian Journal of Earth Sciences 50, no. 5 (2013): 564–75. http://dx.doi.org/10.1139/cjes-2012-0143.

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Sediment cores from Lake DV09, northern Devon Island, Nunavut, Canada (75°34′34″N, 89°18′55″W), were studied to reconstruct the lake ontogeny through analysis and interpretation of the sediment stratigraphy. The lake was uplifted from marine inundation ∼7600 cal BP. After a millennium of rapid sediment accumulation, which coincided with the Holocene Thermal Maximum in the region, accumulation rates decreased over the past 6000 years as the Arctic became colder. This resulted in the deposition of very fine laminae that were interpreted as varves. The uppermost laminated sediments provided a ∼16

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Ávila, Sérgio P., Carlos Melo, Björn Berning, et al. "Towards a ‘Sea‐Level Sensitive’ dynamic model: impact of island ontogeny and glacio‐eustasy on global patterns of marine island biogeography." Biological Reviews 94, no. 3 (2019): 1116–42. http://dx.doi.org/10.1111/brv.12492.

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14

Traver, David, Julien Y. Bertrand, Albert D. Kim, David L. Stachura, and Jennifer L. Cisson. "The Ontogeny of Definitive Hematopoiesis in the Zebrafish." Blood 110, no. 11 (2007): 438. http://dx.doi.org/10.1182/blood.v110.11.438.438.

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Abstract Shifting sites of blood cell production during development is common across widely divergent phyla. In zebrafish, like other vertebrates, hematopoietic development has been roughly divided into two waves, termed primitive and definitive. Primitive hematopoiesis is characterized by the generation of embryonic erythrocytes in the intermediate cell mass and a distinct population of macrophages that arises from cephalic mesoderm. The generation of definitive, or multilineage, hematopoietic precursors during embryogenesis remains less well understood. Here we show, using a combination of g

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Dunn, Nicholas R., Leanne K. O’Brien, and Gerard P. Closs. "Phenotypically Induced Intraspecific Variation in the Morphological Development of Wetland and Stream Galaxias gollumoides McDowall and Chadderton." Diversity 12, no. 6 (2020): 220. http://dx.doi.org/10.3390/d12060220.

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The hypothesis that contrasting hydrology induces divergent intraspecific phenotypic plastic responses in non-migratory freshwater fish was investigated. Morphologies of wetland and stream Galaxias gollumoides from South Island, New Zealand, at different stages of ontogeny, were examined. Phenotypic responses were tested for in a 2 × 2 factorial laboratory based controlled reciprocal transplant experiment with flow (current or no current) and source habitat (wetland or stream), as treatments. There was a shift in the overall head morphology of wetland current treatment G. gollumoides away from

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16

O’Gorman, José P., Marianella Talevi, and Marta S. Fernández. "Osteology of a perinatal aristonectine (Plesiosauria; Elasmosauridae)." Antarctic Science 29, no. 1 (2016): 61–72. http://dx.doi.org/10.1017/s0954102016000365.

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AbstractPerinatal specimens give valuable information about the first stages of vertebrate ontogeny. Here, the morphology and palaeohistology of an aristonectine perinatal specimen from Seymour Island (Isla Marambio), López de Bertodano Formation are analysed. The palaeohistological analysis shows incomplete endochondral ossification (retention of a calcified cartilaginous core in the medullary region), predominance of primary bone tissue without secondary remodelling, lack of primary or secondary osteons and of growth marks in the cortical bone, and open vascular spaces not surrounded by a th

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Galvis, Pedro A., Santiago J. Sánchez-Pacheco, Jhon Jairo Ospina-Sarria, Marvin Anganoy-Criollo, José Gil, and Marco Rada. "Hylid Tadpoles from the Caribbean Island of Hispaniola: Ontogeny, Description and Comparison of External Morphology." South American Journal of Herpetology 9, no. 2 (2014): 154–69. http://dx.doi.org/10.2994/sajh-d-14-00018.1.

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Frankel, Jack S. "Lactate dehydrogenase isozymes of the island barb, Barbus oligolepis (Cypriniformes, Teleostei): their characterization and ontogeny." Comparative Biochemistry and Physiology Part B: Comparative Biochemistry 87, no. 3 (1987): 581–85. http://dx.doi.org/10.1016/0305-0491(87)90055-1.

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19

Asinelli, Marta Eglaé Camargo, Maria Conceição de Souza, and Káthia Socorro Mathias Mourão. "Fruit ontogeny of Garcinia gardneriana (Planch. & Triana) Zappi (Clusiaceae)." Acta Botanica Brasilica 25, no. 1 (2011): 43–52. http://dx.doi.org/10.1590/s0102-33062011000100007.

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Garcinia gardneriana (Clusiaceae) is a small to medium-sized tree that usually occurs on the floodplains of the Paraná River and it is an important food source for the local inhabitants. The fruit itself is consumed in natura, and juices and sweets are made from it. The purpose of this study was to describe morphological and structural aspects of fruits and seeds of this species in order to classify the fruit type and the pulpy layer which involves the seeds. The material analyzed consisted of ovary and fruits in different stages of development, collected from five plants from Aurélio Island,

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20

Lee, Chen-Lu, Colin K. C. Wen, Yen-Hsun Huang, Chia-Yun Chung, and Hsing-Juh Lin. "Ontogenetic Habitat Usage of Juvenile Carnivorous Fish Among Seagrass-Coral Mosaic Habitats." Diversity 11, no. 2 (2019): 25. http://dx.doi.org/10.3390/d11020025.

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Seagrass beds and coral reefs are both considered critical habitats for reef fishes, and in tropical coastal regions, they often grow together to form “mosaic” habitats. Although reef fishes clearly inhabit such structurally complex environments, there is little known about their habitat usage in seagrass-coral mosaic habitats. The goal of this study was to examine potential factors that drive habitat usage pattern by juvenile reef fishes. We quantified (1) prey availability, (2) potential competitors, and 3) predators across a gradient of mosaic habitats (n = 4 habitat types) for four dominan

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21

Herbomel, P., B. Thisse, and C. Thisse. "Ontogeny and behaviour of early macrophages in the zebrafish embryo." Development 126, no. 17 (1999): 3735–45. http://dx.doi.org/10.1242/dev.126.17.3735.

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In the zebrafish embryo, the only known site of hemopoieisis is an intra-embryonic blood island at the junction between trunk and tail that gives rise to erythroid cells. Using video-enhanced differential interference contrast microscopy, as well as in-situ hybridization for the expression of two new hemopoietic marker genes, draculin and leucocyte-specific plastin, we show that macrophages appear in the embryo at least as early as erythroid cells, but originate from ventro-lateral mesoderm situated at the other end of the embryo, just anterior to the cardiac field. These macrophage precursors

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22

Bertrand, Julien, Albert Kim, Jennifer Cisson, David Stachura, and David Traver. "The Ontogeny of Definitive Hematopoiesis in the Zebrafish." Blood 112, no. 11 (2008): sci—43—sci—43. http://dx.doi.org/10.1182/blood.v112.11.sci-43.sci-43.

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Abstract Shifting sites of blood cell production during development is common across widely divergent phyla. In zebrafish, like other vertebrates, hematopoietic development has been roughly divided into two waves, termed “primitive” and “definitive.” Primitive hematopoiesis rapidly generates erythrocytes and macrophages through monopotent precursors for immediate use in the developing embryo. Definitive hematopoiesis arises later and generates multipotent precursors, including hematopoietic stem cells (HSCs). We have recently performed the first prospective isolation and functional characteriz

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23

Bohlman, Stephanie, and Sean O'Brien. "Allometry, adult stature and regeneration requirement of 65 tree species on Barro Colorado Island, Panama." Journal of Tropical Ecology 22, no. 2 (2006): 123–36. http://dx.doi.org/10.1017/s0266467405003019.

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This study provides a community-level analysis of how regeneration requirement and adult stature are related to tree allometry (diameter, height and crown size) throughout post-seedling ontogeny on Barro Colorado Island, Panama. Comparing 65 species, gap species are taller, have higher diameter growth rates and occupy more low-canopy sites (≤10 m canopy height) than shade species at small diameters (≤10 cm dbh). For trees >10 cm dbh, diameter-height relationships and growth rates no longer differ between gap and shade species, but shade species have larger, particularly deeper, crowns than

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BAYARTOGTOKH, BADAMDORJ, and SERGEY G. ERMILOV. "Ontogeny of morphological traits in Oribatella palustris Hammer, 1962, with remarks on juveniles of Oribatellidae (Acari: Oribatida)." Zootaxa 4717, no. 1 (2019): 85–103. http://dx.doi.org/10.11646/zootaxa.4717.1.8.

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In this work, the larva and tritonymph of Oribatella palustris, an Antarctic and Subantarctic species of the Neotropical region are investigated along with supplementary re-description of adults. Comparative characteristics of juveniles of Oribatellidae, especially larvae and tritonymphs, are given based on this study and available literature sources; keys for identification of larvae and tritonymphs of Oribatella are also presented. Previous record of Oribatella palustris from a tropical island of Mexico is questioned.

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Malick, MJ, ME Hunsicker, MA Haltuch, SL Parker-Stetter, AM Berger, and KN Marshall. "Relationships between temperature and Pacific hake distribution vary across latitude and life-history stage." Marine Ecology Progress Series 639 (April 2, 2020): 185–97. http://dx.doi.org/10.3354/meps13286.

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Environmental conditions can have spatially complex effects on the dynamics of marine fish stocks that change across life-history stages. Yet the potential for non-stationary environmental effects across multiple dimensions, e.g. space and ontogeny, are rarely considered. In this study, we examined the evidence for spatial and ontogenetic non-stationary temperature effects on Pacific hake Merluccius productus biomass along the west coast of North America. Specifically, we used Bayesian additive models to estimate the effects of temperature on Pacific hake biomass distribution and whether the e

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Gushulak, Cale A. C., Jisuo Jin, and David M. Rudkin. "Paleolatitudinal morpho-gradient of the early Silurian brachiopod Pentameroides in Laurentia." Canadian Journal of Earth Sciences 53, no. 7 (2016): 680–94. http://dx.doi.org/10.1139/cjes-2015-0183.

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Pentameroides is a large-shelled pentameride brachiopod, which was widespread throughout Laurentia in the early Silurian (Telychian). Evolving from Pentamerus in the early Telychian, it dispersed from its subtropical – high tropical origin to subequatorial intracratonic seas by the late Llandovery. In this study, large collections of reef-dwelling Pentameroides septentrionalis from the Attawapiskat Formation, Akimiski Island, Nunavut, and level-bottom-inhabiting Pentameroides subrectus from the Fossil Hill Formation, Manitoulin Island, Ontario, and the Jupiter Formation, Anticosti Island, Queb

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BAYARTOGTOKH, BADAMDORJ, SERGEY G. ERMILOV, and OMID JOHARCHI. "Ontogenetic instars of Lepidacarus maafushiensis sp. nov. from the Maldives, with remarks on morphological ontogeny of Lohmanniidae (Acari, Oribatida)." Zootaxa 5187, no. 1 (2022): 7–29. http://dx.doi.org/10.11646/zootaxa.5187.1.4.

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Although the juvenile instars of oribatid mite family Lohmanniidae are well known compared to the other families of the infraorder Enarthronota, information on morphological ontogeny most known species is still lacking. Herein, a new species of the genus Lepidacarus is proposed from soil-litter of the Maafushi Island, Maldives, based on all ontogenetic instars. A comparative analysis of ontogenetic instars of species belonging various genera of Lohmanniidae is given, and the major characteristics of juvenile instars of 21 species are presented. From this analysis, it can be generalized that th

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Baker, Jason D., and Mary J. Donohue. "Ontogeny of swimming and diving in northern fur seal (Callorhinus ursinus) pups." Canadian Journal of Zoology 78, no. 1 (2000): 100–109. http://dx.doi.org/10.1139/z99-190.

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Time spent in the water and diving behavior of northern fur seal (Callorhinus ursinus) pups were monitored between birth and weaning at St. Paul Island, Alaska. The median age when pups began swimming was 26 days, but prior to 40 days of age they spent virtually all their time on shore and only rarely took brief (15-20 min) swims. Pups began spending substantial time in the water at approximately 40-50 days of age, coinciding both with the early growth of insulating underfur and a seasonal peak in sea surface temperature. This suggests that pups had earlier been constrained to remain on shore

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Mims, C. W., and R. L. Doudrick. "Ultrastructure of spermatia and spermatium ontogeny in the rust fungus Cronartium quercuum f.sp. fusiforme." Canadian Journal of Botany 74, no. 7 (1996): 1050–57. http://dx.doi.org/10.1139/b96-129.

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Spermogonia of Cronartium quercuum f.sp. fusiforme developed just beneath the bark on galled regions of infected pine seedlings. Spermogonia consist of flattened, spreading, island-like masses of fungal tissue covered with a thin layer of liquid containing large numbers of spermatia. Spermatia arose in an annellophoric fashion from the tips of long, slender sporogenous cells produced in a distinct layer. Each sporogenous cell contained a large prominent nucleus that underwent mitosis as each spermatium initial developed. One of the resulting nuclei moved into the initial while the other remain

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Kitajima, Kaoru, S. Joseph Wright, and Jared W. Westbrook. "Leaf cellulose density as the key determinant of inter- and intra-specific variation in leaf fracture toughness in a species-rich tropical forest." Interface Focus 6, no. 3 (2016): 20150100. http://dx.doi.org/10.1098/rsfs.2015.0100.

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Leaves as the main photosynthetic organ of plants must be well protected against various hazards to achieve their optimal lifespans. Yet, within-species variation and the material basis of leaf strength have been explored for very few species. Here, we present a large dataset of leaf fracture toughness from a species-rich humid tropical forest on Barro Colorado Island, Panama, reporting both among- and within-species variation in relation to light environment (sun-lit canopy versus shaded understorey) and ontogeny (seedlings versus adults). In this dataset encompassing 281 free-standing woody

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Alderete-Macal, María José, Javier Caraveo-Patiño, and Edgar Mauricio Hoyos-Padilla. "Ontogenetic differences in muscle fatty acid profile of white sharks Carcharodon carcharias off Guadalupe Island, México." Revista de Biología Marina y Oceanografía 55, no. 1 (2020): 37. http://dx.doi.org/10.22370/rbmo.2020.55.1.2372.

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Carcharodon carcharias is a protected species occupying the apex of most marine foodwebs where they are present. Aggregation areas, such as Guadalupe Island, México, that have been related to feeding events, are of special interest for this species conservation. The aim of this study was to describe the fatty acid profile of C. carcharias' muscle for the first time on Guadalupe Island, using non-lethal biopsy methods to determine ontogenetic and sex differences in relation to diet and habitat use. Fatty acid profiles and biomarkers from different individuals are explored as a source of integra

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Baylis, A. M. M., B. Page, K. Peters, R. McIntosh, J. Mckenzie, and S. Goldsworthy. "The ontogeny of diving behaviour in New Zealand fur seal pups (Arctocephalus forsteri)." Canadian Journal of Zoology 83, no. 9 (2005): 1149–61. http://dx.doi.org/10.1139/z05-097.

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This study investigated the development of diving in 21 New Zealand fur seal pups, Arctocephalus forsteri (Lesson, 1828), prior to weaning at Cape Gantheaume, Kangaroo Island. Diving behaviour was examined using time–depth recorders, which were deployed during two time periods, 5 months prior to weaning (n = 6) and 2 months prior to weaning (n = 15). Scats were also examined to assess whether fur seal pups foraged prior to weaning. The maximum dive depth attained was 44 m, while the maximum dive duration was 3.3 min. Immediately prior to weaning, fur seal pups spent a greater proportion of the

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Lee, Olivia, Russel D. Andrews, Vladimir N. Burkanov, and Randall W. Davis. "Ontogeny of early diving and foraging behavior of northern fur seal (Callorhinus ursinus) pups from Bering Island, Russia." Marine Biology 161, no. 5 (2014): 1165–78. http://dx.doi.org/10.1007/s00227-014-2408-8.

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Daly, R., JD Filmalter, LR Peel, et al. "Ontogenetic shifts in home range size of a top predatory reef-associated fish (Caranx ignobilis): implications for conservation." Marine Ecology Progress Series 664 (April 15, 2021): 165–82. http://dx.doi.org/10.3354/meps13654.

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Defining the home range of vulnerable species is critical for designing effective spatial management strategies. However, animal home ranges often change with ontogeny, and quantifying the associated temporal and spatial changes is particularly challenging for mobile marine species. Here, we investigated how the space use of a top predatory reef-associated fish (giant trevally Caranx ignobilis) scales with body size. Fish were tagged with acoustic transmitters and passively tracked for >3 yr at a tropical island and atoll in the Republic of Seychelles. A sheltered atoll environment was crit

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Raffel, Andreas, Claus F. Eisenberger, Kenko Cupisti, et al. "Increased EpCAM expression in malignant insulinoma: potential clinical implications." European Journal of Endocrinology 162, no. 2 (2010): 391–98. http://dx.doi.org/10.1530/eje-08-0916.

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ObjectiveEpCAM (CD326) is overexpressed in progenitor cells of endocrine pancreatic islands of Langerhans during fetal development and was suggested to act as a morphoregulatory molecule in pancreatic island ontogeny. We tested whether EpCAM overexpression is reactivated in insulinomas, endocrine tumors arising in the pancreas.Design/methodWe used monoclonal anti-EpCAM antibody Ber-Ep4 for immunohistochemistry on formalin-fixed and paraffin-embedded tumor material. We analyzed 53 insulinomas: 40 benign (disease stage<IIa) and 13 malignant tumors (disease stage IIIb/IV). Disease stage dispos

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Ohinata, H., S. Tochinai, and C. Katagiri. "Ontogeny and tissue distribution of leukocyte-common antigen bearing cells during early development of Xenopus laevis." Development 107, no. 3 (1989): 445–52. http://dx.doi.org/10.1242/dev.107.3.445.

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To analyze the ontogenic emergence of leukocytes during early development, a mouse monoclonal antibody (IgG1), designated as XL-1, was produced against the peritoneal macrophages of adult Xenopus laevis. The XL-1 determinant was expressed on all types of leukocytes, including lymphocytes, granulocytes, thrombocytes and macrophages, but not on erythrocytes of either larvae or adults. Immunohistochemical observations of the hemopoietic organs revealed that the XL-1+ cells with granulocyte and/or macrophage morphology appeared at st.36-37 in the liver, at st.44-45 in the mesonephric and the thymu

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Aubrechtová, Martina. "Review of ascocerid cephalopods from the upper Silurian of the Prague Basin (Central Bohemia) – history of research and palaeobiogeographic relationships." Fossil Imprint 75, no. 1 (2019): 14–24. http://dx.doi.org/10.2478/if-2019-0001.

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Abstract The order Ascocerida Kuhn, 1949 includes rare and morphologically unique early Palaeozoic cephalopods, in which periodic shell truncation occurred during ontogeny; mature shells subsequently became inflated, with thin sigmoidal septa and phragmocone chambers situated above the living chamber. The ascocerids are at present known mainly from North America and Baltoscandic Europe. The group was first described by J. Barrande in the mid 1800’s from the upper Silurian of Bohemia. Finds of ascocerid fossils in Bohemia are generally scarce but Barrande’s collection includes tens of well-pres

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Tian, Ye, Jin Xu, Shachuan Feng, et al. "The first wave of T lymphopoiesis in zebrafish arises from aorta endothelium independent of hematopoietic stem cells." Journal of Experimental Medicine 214, no. 11 (2017): 3347–60. http://dx.doi.org/10.1084/jem.20170488.

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T lymphocytes are key cellular components of the adaptive immune system and play a central role in cell-mediated immunity in vertebrates. Despite their heterogeneities, it is believed that all different types of T lymphocytes are generated exclusively via the differentiation of hematopoietic stem cells (HSCs). Using temporal–spatial resolved fate-mapping analysis and time-lapse imaging, here we show that the ventral endothelium in the zebrafish aorta–gonad–mesonephros and posterior blood island, the hematopoietic tissues previously known to generate HSCs and erythromyeloid progenitors, respect

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Larrue, Sébastien, Jean-François Butaud, Curtis C. Daehler, Stéphane Ballet, Julien Chadeyron, and Roger Oyono. "Persistence at the final stage of volcanic island ontogeny: Abiotic predictors explain native plant species richness on 111 remote Pacific atolls." Ecology and Evolution 8, no. 23 (2018): 12208–20. http://dx.doi.org/10.1002/ece3.4680.

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Nowak, Benia V. R., W. Don Bowen, Cornelia E. den Heyer, Shelley L. C. Lang, and Damian C. Lidgard. "Ontogeny of movement patterns in naïve grey seal pups inhabiting a complex continental shelf ecosystem." PLOS ONE 18, no. 9 (2023): e0290707. http://dx.doi.org/10.1371/journal.pone.0290707.

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Most vertebrate offspring must transition from the relative security of parental care (nutrition and protection) to independent foraging. Offspring face many challenges during this critical period, particularly in species where parental care ends at weaning, such as the grey seal (Halichoerus grypus). We studied the development of movement behaviour in naïve grey seal pups from their first trips to sea to about five months of age. Twenty-five (12 males and 13 females) newly-weaned pups were fitted with satellite-linked GPS tags on Sable Island, Nova Scotia, Canada in January 2016. The influenc

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Wolfe, Alexander P. "Spatial patterns of modern diatom distribution and multiple paleolimnological records from a small arctic lake on Baffin Island, Arctic Canada." Canadian Journal of Botany 74, no. 3 (1996): 435–49. http://dx.doi.org/10.1139/b96-054.

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The assumption that within-lake, deep-water sedimentary diatom assemblages are relatively uniform and that a single core is sufficient to depict lake ontogeny was tested for a small tarn on the southwestern Cumberland Peninsula of Baffin Island, Northwest Territories. Diatom transport and deposition were evaluated through analyses of periphytic, planktonic, and epipelic habitats. Diatom stratigraphies of four cores were used to test whether or not trends are comparable in different regions of the lake and throughout the Holocene. Among 12 surface-sediment stations, diatom distributions were al

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Vendetti, Jann E., Kimiko Sandig, Armenuhi Sahakyan, and Alyana Granados. "Multiple Introductions of the Pestiferous Land Snail Theba pisana (Müller, 1774) (Gastropoda: Helicidae) in Southern California." Insects 12, no. 8 (2021): 662. http://dx.doi.org/10.3390/insects12080662.

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The terrestrial land snail Theba pisana is circum-Mediterranean in native range and widely introduced and pestiferous in regions around the world. In California, USA, T. pisana has been recorded intermittently since 1914, but its source population(s) are unknown, and no morphological or molecular analyses within or between California populations have been published. Therefore, we compared molecular data (CO1, 16S, ITS2) and internal morphology (jaw, radula, reproductive system) in T. pisana collected from Los Angeles and San Diego counties in 2019–2020. DNA barcode (CO1 mtDNA) analysis reveale

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Guinet, C., N. Servera, T. Deville, and G. Beauplet. "Changes in subantarctic fur seal pups' activity budget and diving behaviours throughout the rearing period." Canadian Journal of Zoology 83, no. 7 (2005): 962–70. http://dx.doi.org/10.1139/z05-087.

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Time spent in the water and diving behaviour of subantarctic fur seals (Arctocephalus tropicalis (Gray, 1872)) at Amsterdam Island in the southern Indian Ocean were investigated using time–depth recorders throughout the pup-rearing period. The main finding of this study, contrary to the findings of previous studies conducted on other fur seal species, was the decrease in the mean daily amount of time spent in the water throughout the pup-rearing period. The decrease in the amount of time spent in the water by older individuals compared with younger ones is likely to be related to the reduction

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Mathews, Joshua C., and Karen E. Samonds. "A juvenile subfossil crocodylian from Anjohibe Cave, Northwestern Madagascar." PeerJ 4 (September 15, 2016): e2296. http://dx.doi.org/10.7717/peerj.2296.

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Madagascar’s subfossil record preserves a diverse community of animals including elephant birds, pygmy hippopotamus, giant lemurs, turtles, crocodiles, bats, rodents, and carnivorans. These fossil accumulations give us a window into the island’s past from 80,000 years ago to a mere few hundred years ago, recording the extinction of some groups and the persistence of others. The crocodylian subfossil record is limited to two taxa,Voay robustusandCrocodylus niloticus, found at sites distributed throughout the island.V. robustusis extinct whileC. niloticusis still found on the island today, but w

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BUNGARTZ, Frank, John A. ELIX, Klaus KALB, and Mireia GIRALT. "New and overlooked species from the Galapagos Islands: the generic concept ofDiploiciareassessed." Lichenologist 48, no. 5 (2016): 489–515. http://dx.doi.org/10.1017/s0024282916000244.

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AbstractThree new species ofDiploiciaare described from the Galapagos Islands and a fourth,D. glebosa, is transferred fromPyxine; all four are considered endemic to the archipelago. In order to accommodate these species, the generic concept ofDiploiciahas been emended. Two of the species are sterile;D. leproidicais placodioid-leproid, where the thalli derive from pseudocorticate granules aggregating into small, placodioid rosettes with distinctly lobate margins. The second sterile species,D. squamulosa, forms scattered squamules that eventually aggregate into small, placodioid rosettes. The tw

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Giralt, Mireia, Javier Etayo, and Pieter van den Boom. "Buellia Laurocanariensis, a New Species from the Canary Islands." Lichenologist 34, no. 3 (2002): 203–6. http://dx.doi.org/10.1006/lich.2002.0392.

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AbstractA new corticolous species of Buellia is described from La Palma and La Gomera (Canary Islands). It is mainly characterized by its strongly ornamented, (l-2)-3-septate ascospores with apical and septa thickenings, which follow an ascospore-ontogeny of type B, and its chemistry. The new species is compared with the related Buellia lauricassiae (Fée) Mü. Arg. and B. lauricassiaeoides Aptroot. Illustrations of the ascospores of B. laurocanariensis and B. lauricassiaeoides are presented. A habit photograph of the new species is also provided.

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ARROYO, NINA LARISSA, AMALIA CUADROS, GOTZON BASTERRETXEA, and JOAN MORANTA. "Mediterranean juvenile white seabream rely on phytal fauna as primary food source in coastal nursery areas." Mediterranean Marine Science 24, no. 1 (2023): 117–30. http://dx.doi.org/10.12681/mms.30018.

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Nursery areas are essential fish habitats due to their relevance in the survival of early stages of fish populations. They are also considered as of high priority in marine conservation strategies. Here, we investigated the diet of white seabream [Diplodussargus (Linnaeus, 1758)] settlers in six nursery areas located in the shallow waters of coves in Minorca Island (Balearic Islands, Spain). Our aim was to characterize the food sources at different stages of juvenile development and their site-related variability in order to discern the importance of trophic links in cove selection during sett

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Brown, J., P. Brickle, and B. E. Scott. "The parasite fauna of the Patagonian toothfish Dissostichus eleginoides off the Falkland Islands." Journal of Helminthology 87, no. 4 (2012): 501–9. http://dx.doi.org/10.1017/s0022149x12000636.

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AbstractThe parasite fauna of juvenile Dissostichus eleginoides, while they inhabit the Falkland's shelf, was examined, giving new detailed information on spatial, ontogenic and seasonal variations. A total of 24,943 parasites from 15 different taxa were found in the stomach of 502 individual fish. Parasite species composition and abundance allowed separation of toothfish by area between the north-west and south-east of the Falklands. The digenean, Elytrophalloides oatesi, and the nematodes, Hysterothylacium spp. and Anisakis spp., were the most common, all with a prevalence >20%. For some

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Arias, Andrés, Jorge Núñez, and Hannelore Paxton. "Onuphid polychaetes associated with theCymodocea nodosameadows of La Gomera (Canary Islands, NW Africa) – new species and new records from the eastern North Atlantic." Journal of the Marine Biological Association of the United Kingdom 97, no. 5 (2017): 857–69. http://dx.doi.org/10.1017/s0025315417000194.

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This study recognizes six species of onuphid polychaetes associated with theCymodocea nodosameadows of the Canary Islands. Of these, three species of the genusAponuphis, A. bilineata, A. brementiandA. ornatahave been previously reported from the eastern North Atlantic, whilstA. willsieiwas only known from the western Mediterranean Sea. We describe two new species:Onuphis ericisp. nov. andKinbergonuphis sanmartinisp. nov., of which the latter represents the first discovery of the genusKinbergonuphisin the eastern North Atlantic Ocean. Furthermore, we present brief notes on their ontogeny and ec

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Kellner, Alexander W. A. "Comments on Triassic pterosaurs with discussion about ontogeny and description of new taxa." Anais da Academia Brasileira de Ciências 87, no. 2 (2015): 669–89. http://dx.doi.org/10.1590/0001-3765201520150307.

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Eudimorphodon ranzii was the first Triassic pterosaur to be described and several specimens have been referred to this taxon mainly based on the presence of multicuspid teeth. Since this dental feature has been observed in several other pterosaurs, the revision of some specimens assigned to Eudimorphodon shows that they represent new taxa as follows: Arcticodactyluscromptonellus (comb. nov.), Austriadraco dallavecchiai (gen. et sp. nov.) and Bergamodactyluswildi (gen. et sp. nov.). A preliminary analysis of pterosaur ontogeny resulted in the recognition of six distinct ontogenetic stages (OS1-

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