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Journal articles on the topic 'Hydrozoans'

Author: Grafiati

Published: 18 April 2022

Last updated: 18 July 2025

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1

Gravili, Cinzia, Ferdinando Boero, Pietro Alifano, and Loredana Stabili. "Association between luminous bacteria and Hydrozoa in the northern Ionian Sea." Journal of the Marine Biological Association of the United Kingdom 92, no. 6 (2011): 1317–24. http://dx.doi.org/10.1017/s0025315411001408.

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Several hydroid species live associated with many organisms, including bacteria. Hydroid–bacteria associations were searched for in twenty Hydrozoa species that were collected in the northern Ionian Sea and observed under blue light excitation. Of these, six showed high fluorescence on the outer perisarc, five appeared medium fluorescent, four were slightly fluorescent, and five did not show any fluorescence. Luminous bacteria were isolated and counted from the surface of the fluorescent hydroids. Their association with hydrozoan species could be explained by their feeding activity on the chit

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2

Lundsteen, Steffen, Erlingur Hauksson, and Karl Gunnarsson. "Hydrozoan colonization and succession in the tidal and subtidal zones in Surtsey during the period 1967 to 1984." Surtsey research 14 (June 2020): 131–39. http://dx.doi.org/10.33112/surtsey.14.11.

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This article reports on results of investigations of hydrozoans collected in Surtsey, Iceland in the period 1967 – 1984. Samples were collected in the intertidal zone and by divers in the subtidal zone down to 40 m. A list and illustrations of hydrozoan species found in the intertidal and subtidal rocky bottom in Surtsey are presented. Species numbers increased steadily during the study period and in 1984 a total of 37 species were recorded in Surtsey making hydrozoans one of the most diverse marine invertebrate groups in Surtsey. Among hydrozoans found during the study are 8 species not previ

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3

Montano, Simone, Simone Fattorini, Valeriano Parravicini, et al. "Corals hosting symbiotic hydrozoans are less susceptible to predation and disease." Proceedings of the Royal Society B: Biological Sciences 284, no. 1869 (2017): 20172405. http://dx.doi.org/10.1098/rspb.2017.2405.

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In spite of growing evidence that climate change may dramatically affect networks of interacting species, whether—and to what extent—ecological interactions can mediate species' responses to disturbances is an open question. Here we show how a largely overseen association such as that between hydrozoans and scleractinian corals could be possibly associated with a reduction in coral susceptibility to ever-increasing predator and disease outbreaks. We examined 2455 scleractinian colonies (from both Maldivian and the Saudi Arabian coral reefs) searching for non-random patterns in the occurrence o

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Estrada-González, Mariae C., María Esther Jiménez-López, Leonardo Huato-Soberanis, and María A. Mendoza-Becerril. "Socioenvironmental and Spatial Criteria as Tools for the Management and Conservation of Hydrozoans in Protected and Unprotected Areas." Diversity 15, no. 2 (2023): 182. http://dx.doi.org/10.3390/d15020182.

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The cnidarians of the class Hydrozoa comprise 3720 species, are globally distributed, and can have complex life cycles. In the Espíritu Santo Archipelago (ESA), Mexico, hydrozoans are understudied, and, for this reason, the present work describes the taxocene of hydrozoans and their oceanographic preferences in the area. Hydrozoans were collected at 12 sampling stations in the archipelago during the temperate season; these organisms were morphologically identified and a systematic list including socioenvironmental attributes (SEA) was created. Species richness was used to assess the representa

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Maggioni, Davide, Giulia Furfaro, Michele Solca, Davide Seveso, Paolo Galli, and Simone Montano. "Being Safe, but Not Too Safe: A Nudibranch Feeding on a Bryozoan-Associated Hydrozoan." Diversity 15, no. 4 (2023): 484. http://dx.doi.org/10.3390/d15040484.

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Nudibranchs have a mostly carnivorous diet, and they prey on a wide variety of other animal taxa. Many species, mainly belonging to the Cladobranchia suborder, feed on cnidarians, including member of the class Hydrozoa. Several hydrozoan species display a symbiotic lifestyle, being associated with other benthic invertebrates, including for instance bryozoans, corals, octocorals, and sponges. In our knowledge, no record of nudibranch predation on symbiotic hydrozoans has been reported so far, possibly thanks to the protective action by the host towards its symbiotic hydrozoan. Here, we show the

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Torres-Rodríguez, Javier, Daniel Ortiz-Oyola, Alejandra Puentes-Sayo, Orlando P. Lecompte, and Aminta Jauregui. "Genetic and morphologic identities of hydrozoans (Cnidaria, Hydrozoa) from reef patches of Santa Marta, Colombian Caribbean." Zootaxa 4758, no. 1 (2020): 127–40. https://doi.org/10.11646/zootaxa.4758.1.5.

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Torres-Rodríguez, Javier, Ortiz-Oyola, Daniel, Puentes-Sayo, Alejandra, Lecompte, Orlando P., Jauregui, Aminta (2020): Genetic and morphologic identities of hydrozoans (Cnidaria, Hydrozoa) from reef patches of Santa Marta, Colombian Caribbean. Zootaxa 4758 (1): 127-140, DOI: 10.11646/zootaxa.4758.1.5

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Gao, Tian, Mari Aizawa, and Atsushi Yamaguchi. "Seasonal Changes in Vertical Distribution and Population Structure of the Dominant Hydrozoan Aglantha digitale in the Western Subarctic Pacific." Oceans 4, no. 3 (2023): 242–52. http://dx.doi.org/10.3390/oceans4030017.

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Hydrozoans are numerically dominant taxa in gelatinous zooplankton communities of the worldwide oceans and play an energy transfer role connecting primary producers and higher trophic level organisms. In the western subarctic Pacific, St. K2 has been established as a long-term time-series monitoring station. Various studies on zooplankton have been conducted, while hydrozoans have not been treated. This study presents the abundance, vertical distribution, and population structure of the dominant hydrozoan species (Aglantha digitale) at St. K2. Samples collected by vertical stratification sampl

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8

Getachew, Paulos, Bo-Hye Nam, and Yong-Ki Hong. "Comparison of proteomic profiles of the phaeophyte Saccharina japonica thalli proximal to and beneath the front of epiphytic hydrozoan colonies against healthy tissue." Botanica Marina 62, no. 4 (2019): 369–78. http://dx.doi.org/10.1515/bot-2018-0088.

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Abstract The stoloniferous hydrozoan Obelia geniculata commonly colonizes macroalgae such as Saccharina japonica. Each Obelia colony consists of thread-like hydrorhizae attached to the seaweed thallus. The early signaling proteins of epiphytic contamination can be identified using proteomics. To isolate these early signals, parts of the thallus proximal to the hydrozoans were separated from beneath the colony front and from healthy tissue. From the proteomic profiles of S. japonica, we detected 110 protein spots from tissue proximal to hydrozoan colonies (56 increased, 53 decreased, and 1 unch

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9

Yüksel, Esin, Melek Isinibilir, and Luis Martell. "Diversity of hydrozoans on artificial substrates in large commercial ports of the Sea of Marmara." Oceanological and Hydrobiological Studies 53, no. 4 (2024): 435–46. https://doi.org/10.26881/oahs-2024.4.10.

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Research on biofouling assemblages in large ports is crucial for economic, environmental and regulatory purposes, as it provides critical information for managing marine ecosystems, preventing the spread of invasive species and developing effective antifouling strategies. Hydrozoans are among the most common invertebrates found in marine biofouling communities, making them a priority taxon for monitoring and identification in large ports. In this study, we documented the diversity of benthic hydrozoans growing on three types of artificial panels (wood, plastic, and rope) submerged for three mo

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Kayal, Ehsan, Bastian Bentlage, Paulyn Cartwright, et al. "Phylogenetic analysis of higher-level relationships within Hydroidolina (Cnidaria: Hydrozoa) using mitochondrial genome data and insight into their mitochondrial transcription." PeerJ 3 (November 19, 2015): e1403. http://dx.doi.org/10.7717/peerj.1403.

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Hydrozoans display the most morphological diversity within the phylum Cnidaria. While recent molecular studies have provided some insights into their evolutionary history, sister group relationships remain mostly unresolved, particularly at mid-taxonomic levels. Specifically, within Hydroidolina, the most speciose hydrozoan subclass, the relationships and sometimes integrity of orders are highly unsettled. Here we obtained the near complete mitochondrial sequence of twenty-six hydroidolinan hydrozoan species from a range of sources (DNA and RNA-seq data, long-range PCR). Our analyses confirm p

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Wintzer, Alpa P., Mariah H. Meek, and Peter B. Moyle. "Trophic ecology of two non-native hydrozoan medusae in the upper San Francisco Estuary." Marine and Freshwater Research 62, no. 8 (2011): 952. http://dx.doi.org/10.1071/mf10221.

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Blooms of some gelatinous zooplankton are increasing worldwide, often disrupting foodwebs. Invasions of non-native jellyfish are a growing problem in many estuaries, including the San Francisco Estuary, where at least two species of Ponto-Caspian hydrozoans, Maeotias marginata Modeer, 1791 and Moerisia sp., are abundant. The present study investigated their trophic ecology, testing the following hypotheses: (1) diets over the bloom and at the diel scale are comprised of a variety of prey items; (2) hydrozoans are generalist feeders; (3) hydrozoans feed on the larvae of declining fish species;

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12

Van Iten, Heyo. "Affinities and class-level systematics of the phylum Cnidaria." Paleontological Society Special Publications 6 (1992): 297. http://dx.doi.org/10.1017/s2475262200008571.

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Phylogenetic relationships among the cnidarian classes Anthozoa, Hydrozoa and Scyphozoa, and between Cnidaria and other metazoan phyla, continue to be subject to widely divergent interpretations. Also controversial are the affinities of numerous fossil groups, including Byronia Bischoff, Sphenothallus Hall and conulariids, that have been interpreted as extinct cnidarians. Currently favored interpretations of evolution within Cnidaria are generally consistent with one of two alternative hypotheses of phylogenetic relationships: scyphozoans and anthozoans are members of a monophylclic group that

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13

Jiasong, Fan, J. Keith Rigby, and Zhang Wei. "“Hydrozoa” from Middle and Upper Permian reefs of South China." Journal of Paleontology 65, no. 1 (1991): 45–68. http://dx.doi.org/10.1017/s0022336000020199.

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Abundant “hydrozoans” are important frame-building and accessory organisms in Middle and Upper Permian reefs of southern China, particularly in western Hubei, eastern Sichuan, eastern Yunnan, and northwestern Guangxi. The new genera Radiotrabeculopora, Lichuanopora, and Pseudopalaeoaplysina are described, as are the new species Disjectopora beipeiensis, D. irregulara, Radiotrabeculopora xiangoboensis, R. maokoui, R. elegans, R. reticulata, R. astrorhiza, Balatonia robusta, Lichuanopora bancaoensis, L.(?) regulara, Pseudopalaeoaplysina sinensis, and P. major. The assemblage represents one of th

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Licona Angeles, Jessica, Francisco Rubén Castañeda Rivero, and María A. Mendoza-Becerril. "Community Composition of Epibiont Hydroids of the Naturalized Alien Macroalga Acanthophora spicifera in Pichilingue, Mexico." Biology 14, no. 1 (2025): 44. https://doi.org/10.3390/biology14010044.

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This study provides a detailed analysis of the community of hydrozoan epibionts of Acanthophora spicifera in La Paz Bay, Baja California Sur. The investigation was carried out in two season periods, corresponding to the warm and cold seasons on the pier of the Autonomous University of Baja California Sur (UABCS) Pichilingue research station. The percentage of epibiont coverage was calculated and analyzed. The average length of the thalli was 7.8 ± 4.6 cm. Eleven taxa of hydrozoans were recorded; the hydrozoan Obelia cf. dichotoma had the highest coverage percentage, and in summer, there was a

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Song, Xikun, Bernhard Ruthensteiner, Mingxin Lyu, Xi Liu, Jian Wang, and Jian Han. "Advanced Cambrian hydroid fossils (Cnidaria: Hydrozoa) extend the medusozoan evolutionary history." Proceedings of the Royal Society B: Biological Sciences 288, no. 1944 (2021): 20202939. http://dx.doi.org/10.1098/rspb.2020.2939.

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Primitive cnidarians are crucial for elucidating the early evolution of metazoan body plans and life histories in the late Neoproterozoic and Palaeozoic. The highest complexity of both evolutionary aspects within cnidarians is found in extant hydrozoans. Many colonial hydrozoans coated with chitinous exoskeletons have the potential to form fossils; however, only a few fossils possibly representing hydroids have been reported, which still require scrutiny. Here, we present an exceptionally well-preserved hydroid found in the Upper Cambrian Fengshan Formation in northern China. It was originally

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Muscente, A. D., and Warren D. Allmon. "Revision of the hydroid Plumalina Hall, 1858 in the Silurian and Devonian of New York." Journal of Paleontology 87, no. 4 (2013): 710–25. http://dx.doi.org/10.1666/12-125.

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The feather-shaped Plumalina Hall, 1858 is revised on the basis of new and reexamined specimens from New York. Previously described from Givetian through Famennian deposits, a single compression of P. tenera n. sp. from the Rochester Shale extends the range into the Wenlock, and provides new information regarding Plumalina's biology. We assess the utility of morphologic characters in diagnoses of taxa, and present the first quantitative analysis of fossil hydroids to distinguish P. brevis n. sp. (Frasnian) from other Devonian species.Plumalina has been compared to plants, graptolites, and octo

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Huang, Yulin, Jingqiang Fu, Yutong Shi, Yunan Wang, Qi Cui, and Xikun Song. "Predation behaviour of millimetre-sized hydrozoan polyps on early ivory shell juveniles." Journal of the Marine Biological Association of the United Kingdom 100, no. 6 (2020): 889–95. http://dx.doi.org/10.1017/s0025315420000788.

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AbstractMarine hydroids, the polyp stage of hydrozoans, are assumed to be carnivores and play an important role in benthic-pelagic coupling processes by regulating zooplankton populations and transferring energy. The known hydroid diets mainly consist of zooplankton as well as some benthic diatoms and metazoans, almost all of which have smaller dimensions than the polyp. In the present study, a large-scale breeding failure of the early juveniles of the ivory shell Babylonia areolata (Mollusca: Gastropoda: Babyloniidae) was found in a local aquaculture farm in Fujian, China in July 2018. About

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Dudgeon, Steve, Kylla M. Benes, Stacy A. Krueger, Janet Kübler, Paul Mroz, and Christin T. Slaughter. "On the use of experimental diets for physiological studies of hydrozoans." Journal of the Marine Biological Association of the United Kingdom 89, no. 1 (2008): 83–88. http://dx.doi.org/10.1017/s0025315408001343.

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Recent studies of hydrozoans suggest that metabolic factors associated with the physiology of gastrovascular fluid transport play a role in regulating morphogenetic development of colonies. In that context, the objective of this study was to develop a system to experimentally control diets of hydrozoans in culture that could be used to test effects of specific compounds. This diet delivery system consisted of a known concentration of homogenate of brine shrimp nauplii that was solidified in a 1% agar block cut to the size of, and containing the equivalent of, a single, 2-day old brine shrimp n

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Castellanos Iglesias, Susel, Carlos Varela, Manuel Ortiz Toucet, and María Victoria Orozco. "LOS HIDROZOOS (CNIDARIA, HYDROZOA) DE LA CAYERÍA SUR DEL GOLFO DE BATABANÓ, CUBA." Revista Ciencias Marinas y Costeras 3 (December 31, 2011): 9. http://dx.doi.org/10.15359/revmar.3.1.

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Hidrozoos de aguas poco profundas fueron recolectados en 17 estaciones, en julio del 2004. Las estaciones se localizaron en manglares, pastos marinos y arrecifes coralinos. Se encontraron hidrozoos de dos subclases (Anthoathecata y Leptothecata), 11 familias, 27 géneros y 34 especies. Se indican la localidad de recolecta, la profundidad, el tipo de sustrato, la descripción y las figuras de 15 especies de hidrozoos tecados. Se confirma la presencia de Hebellopsis communis Calder, 1991a y Antennella siliquosa (Hincks, 1877) para el Mar Caribe. Se expresa la abundancia relativa en tres categorías

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Manca, Federica, Stefania Puce, Annalisa Caragnano, et al. "Symbiont footprints highlight the diversity of scleractinian‐associated Zanclea hydrozoans (Cnidaria, Hydrozoa)." Zoologica Scripta 48, no. 3 (2019): 399–410. http://dx.doi.org/10.1111/zsc.12345.

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Kintner, Anna, and Andrew S. Brierley. "Cryptic hydrozoan blooms pose risks to gill health in farmed North Atlantic salmon (Salmo salar)." Journal of the Marine Biological Association of the United Kingdom 99, no. 2 (2018): 539–50. http://dx.doi.org/10.1017/s002531541800022x.

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Sampling at four salmon aquaculture sites along the west coast of Scotland has identified short-lived aggregations of planktonic hydrozoans (>280 individuals m−3), here termed blooms. Several such blooms were linked with increases in gill pathology and mortality in caged fish. Two types, Obelia sp. and Lizzia blondina, were found to cause blooms regularly and often concurrently. Species composition of hydrozoan populations and fluctuations in population sizes were spatially and temporally heterogeneous, with adjacent sites (within 30 km of one another and with similar oceanic exposure) expe

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TORRES-RODRÍGUEZ, JAVIER, DANIEL ORTIZ-OYOLA, ALEJANDRA PUENTES-SAYO, ORLANDO P. LECOMPTE, and AMINTA JAUREGUI. "Genetic and morphologic identities of hydrozoans (Cnidaria, Hydrozoa) from reef patches of Santa Marta, Colombian Caribbean." Zootaxa 4758, no. 1 (2020): 127–40. http://dx.doi.org/10.11646/zootaxa.4758.1.5.

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The morphological and genetic identification of hydrozoans collected in the reef patches of Santa Marta, Colombia was carried out. This study allows to present two new records of hydroids species for the Colombian Caribbean: Halopteris alternata and Dentitheca dendritica. A total of 11 species and 1 genus were found using morphological and genetic identification with partial sequences of the mitochondrial 16S rRNA gene. The order Leptothecata was the most abundant represented by 9 families: Aglaopheniidae, Clytiidae, Haleciidae, Halopterididae, Kirchenpaueriidae, Plumulariidae, Sertularellidae

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Seveso, D., D. Maggioni, R. Arrigoni, et al. "Environmental gradients and host availability affecting the symbiosis between Pteroclava krempfi and alcyonaceans in the Saudi Arabian central Red Sea." Marine Ecology Progress Series 653 (October 29, 2020): 91–103. http://dx.doi.org/10.3354/meps13509.

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Interspecific associations are common in coral reefs, but those involving hydrozoans and octocorals have not been widely investigated. The hydroid Pteroclava krempfi (Hydrozoa, Cladocorynidae) lives in association with different soft coral taxa (Alcyonacea), showing a widespread distribution. However, very little information is available on the ecology of these relationships. Here, we tested for differences in the taxon-specific prevalence and habitat preference of the symbiosis and determined ecological traits of the P. krempfi-host associations in central Red Sea reefs. P. krempfi was found

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Collins, Allen G., Bastian Bentlage, George I. Matsumoto, Steven H. D. Haddock, Karen J. Osborn, and Bernd Schierwater. "Solution to the phylogenetic enigma of Tetraplatia , a worm-shaped cnidarian." Biology Letters 2, no. 1 (2005): 120–24. http://dx.doi.org/10.1098/rsbl.2005.0372.

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Tetraplatia is a genus containing two species of pelagic cnidarians of curious morphology. Their vermiform shape and four swimming flaps are difficult to relate to the features of other cnidarians, thus obscuring their phylogenetic affinities. Since their discovery in the mid-1800s, a number of prominent cnidarian workers have weighed in on this conundrum, some arguing that they are aberrant hydrozoans and others concluding that they are unusual scyphozoans. Current taxonomic practice conforms to the latter view. However, data presented here from the large and small subunits of the nuclear rib

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Galea, Horia R., and Dirk Schories. "Some hydrozoans (Cnidaria) from King George Island, Antarctica." Zootaxa 3321 (December 31, 2012): 1–21. https://doi.org/10.5281/zenodo.213236.

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Galea, Horia R., and Dirk Schories. "Some hydrozoans (Cnidaria) from Central Chile and the Strait of Magellan." Zootaxa 3296 (December 31, 2012): 19–67. https://doi.org/10.5281/zenodo.280882.

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YILMAZ, IZZET NOYAN, LUIS MARTELL, NUR EDA TOPCU та MELEK ISINIBILIR. "Βenthic hydrozoan assemblages as potential indicators of environmental health in a Μediterranean Μarine protected area". Mediterranean Marine Science 21, № 1 (2020): 36. http://dx.doi.org/10.12681/mms.20593.

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The comparative study of marine benthic hydrozoan assemblages can improve our understanding of environmental and ecological conditions in marine protected areas (MPAs) such as the large Mediterranean MPA of Datça-Bozburun, where important prospects for future intensive tourism development exist. The analysis of such assemblages may help managers detect changes in important parameters of ecosystem health within this MPA. In this study we compared the hydrozoan assemblages occurring on hard (rocky) and soft (Posidonia meadows) bottoms from stations belonging to three different conditions: i) sma

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Fernandez-Leborans, Gregorio, Patricia Dávila, Eva Cerezo, and Cristina Contreras. "Epibiosis and hyperepibiosis on Pagurus bernhardus (Crustacea: Decapoda) from the west Coast of Scotland." Journal of the Marine Biological Association of the United Kingdom 93, no. 5 (2012): 1351–62. http://dx.doi.org/10.1017/s0025315412001610.

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The presence of a diverse range of epibionts was found on Pagurus bernhardus from the west coast of Scotland. The invertebrate species found on the shell inhabited by the crab were the hydrozoans Hydractinia echinata and Dycorine conferta, the cirripeds Balanus balanus and Balanus crenatus, the polychaetes Hydroides norvegica, Pomatoceros triqueter and Circeis armoricana, and the molluscs Hiatella arctica and Anomia ephippium. On the crab were observed the polychaete Circeis armoricana and the amphipod Podoceropsis nitida. In addition, on the gastropod shells occupied by P. bernhardus, ciliate

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ÀNGEL, JOAN J. SOTO, and ÁLVARO L. PEÑA CANTERO. "Benthic hydroids (Cnidaria, Hydrozoa) from the Weddell Sea (Antarctica)." Zootaxa 4570, no. 1 (2019): 1. http://dx.doi.org/10.11646/zootaxa.4570.1.1.

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Hydrozoans are a conspicuous component of Antarctic benthic communitites. Recent taxonomic effort has led to a substantial increase in knowledge on the diversity of benthic hydroids from some areas of the Southern Ocean, including the Weddell Sea, the largest sea in the Antarctic region. However, the study of many hydrozoan taxa are still pending, and the diversity in this huge region is expected to be higher than currently known. In order to contribute to the knowledge of taxonomy, ecology and distribution of these cnidarians, a study of unpublished material collected by several German Antarc

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Mayorova, Tatiana, Igor Kosevich, Nickolai Dulin, Elizaveta Savina, and Yulia Kraus. "Organizer regions in marine colonial hydrozoans." Zoology 118, no. 2 (2015): 89–101. http://dx.doi.org/10.1016/j.zool.2014.12.001.

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Martell, L., K. Selsø, J. Titelman, and A. Hosia. "Setting the baseline for the dynamics of siphonophores and hydromedusae in Oslofjorden." Marine Ecology Progress Series 686 (March 24, 2022): 71–89. http://dx.doi.org/10.3354/meps13991.

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Knowledge of the spatio-temporal dynamics of hydromedusae and siphonophores is scarce despite their key role as predators. In the temperate inlet of Oslofjorden, studies dealing with these organisms are limited to a few reports from the 1960s on the relationship between selected species and environmental conditions of the inner fjord, but comprehensive assessments of the horizontal, vertical and seasonal variation of the pelagic hydrozoan community are lacking. In this contribution, the quantitative composition of pelagic hydrozoans in Oslofjorden was surveyed using 2 separate sampling designs

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Kupaeva, Daria, Tatiana Lebedeva, Zachariah Kobrinsky, Daniel Vanwalleghem, Andrey Prudkovsky, and Stanislav Kremnyov. "Margelopsid species search taxonomic home within Corymorphidae and Boreohydridae." PeerJ 11 (December 4, 2023): e16265. http://dx.doi.org/10.7717/peerj.16265.

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Planktonic lifestyle of polyps in representatives of Margelopsidae are very different from all other species in the hydrozoan clade Aplanulata. Their evolutionary origin and phylogenetic position have been the subject of significant speculation. A recent molecular study based only on COI data placed Margelopsidae as a sister group to all Aplanulata, an unexpected result because margelopsid morphology suggests affiliation with Tubulariidae or Corymorphidae. Here we used multigene analyses, including nuclear (18S rRNA and 28S rRNA) and mitochondrial (16S rRNA and COI) markers of the hydroid stag

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Deserti, María I., Sergio N. Stampar, and Fabián H. Acuña. "Diversity of freshwater hydrozoans from Neotropical region: an annotated inventory of species." Revista de Biología Tropical 71, S3 (2023): e56470. http://dx.doi.org/10.15517/rev.biol.trop..v71is3.56470.

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Introduction: Worldwide, six genera of the class Hydrozoa are recognized in continental waters: the cosmopolitan Hydra, the colonial Cordylophora and Pachycordyle, the medusae Craspedacusta and Limnocnida and the little polyp Calpasoma. Even though interest in cnidarians has grown in recent years, those restricted to freshwater continue to be relegated and there is even little published information on the ubiquity of certain species. In the Neotropical region, knowledge about its distribution is still very scarce. Methods: We reviewed the global literature on the subject and different on

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Bosch-Belmar, Escurriola, Milisenda, Fuentes, and Piraino. "Harmful Fouling Communities on Fish Farms in the SW Mediterranean Sea: Composition, Growth and Reproductive Periods." Journal of Marine Science and Engineering 7, no. 9 (2019): 288. http://dx.doi.org/10.3390/jmse7090288.

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Biological fouling organisms on fish cages represent a major issue and costly factor in marine finfish aquaculture. Cnidarians have been identified as one of the most problematical groups, contributing significantly to the occlusion and structural stress of the cage nets, but also dramatically affecting farmed species health in aquaculture facilities worldwide. Recently, significant relationships were established in different Spanish aquaculture facilities between hydrozoans and juvenile fish affected by gill injuries and mortality episodes. Community composition, growth rate and reproductive

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Di Camillo, C., S. Puce, T. Romagnoli, S. Tazioli, C. Totti, and G. Bavestrello. "Relationships between benthic diatoms and hydrozoans (Cnidaria)." Journal of the Marine Biological Association of the United Kingdom 85, no. 6 (2005): 1373–80. http://dx.doi.org/10.1017/s0025315405012555.

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Some examples of relationships between hydroids and epibionthic diatoms from the Mediterranean Sea are described, verifying the kind of interaction existing between the two partners. The athecate Eudendrium racemosum hosts an extremely rich diatom assemblage, mainly comprising Licmophora spp., Amphora spp. and Cocconeis spp. On the contrary, only adnate growth forms (Cocconeis pseudonotata, C. dirupta) were observed in diatom communities growing on the external side of thecate species Campanularia hincksii, Clytia linearis and Synthecium evansi. Some diatom species (Cocconeis notata, Cylindrot

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Di Camillo, Cristina, Stefania Puce, Tiziana Romagnoli, Silvia Tazioli, Cecilia Totti, and Giorgio Bavestrello. "Coralline algae epibionthic on thecate hydrozoans (Cnidaria)." Journal of the Marine Biological Association of the United Kingdom 86, no. 6 (2006): 1285–89. http://dx.doi.org/10.1017/s0025315406014305.

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The relationships between three species of thecate hydrozoans, Sertularella crassicaulis, Sertularella ellisii and Aglaophenia tubiformis with three species of encrusting Corallinales, Pneophyllum fragile, Melobesia membranacea and Hydrolithon cf. farinosum from different locations in the western Mediterranean are described. In Aglaophenia tubiformis, algae were observed on the hydrotheca, while in Sertularella spp. they grew on the stem, the branches and the hydrothecae which became completely covered by encrusting, calcified thalli. The polyps were living in the covered theca. The hydroid sp

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Antsulevich, Alexander E. "Biogeographic and faunistic division of the Eurasian Polar Ocean based on distributions of Hydrozoa (Cnidaria)." Journal of the Marine Biological Association of the United Kingdom 95, no. 8 (2015): 1533–39. http://dx.doi.org/10.1017/s0025315415000181.

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The hydroid and hydromedusa fauna of Russian Arctic seas, totalling 161 species, has been revised taxonomically and biogeographically. Diversity is highest in the Barents Sea, where 133 species are known to occur. Species composition of Hydrozoa throughout Russian Eurasia is decidedly uniform, with marked similarity among all regional faunistic lists. An assemblage of Arctic ubiquitists, a majority of them boreal-Arctic species, comprise the main element of hydrozoans in all Arctic seas. This faunistic main element is responsible for the faunal uniformity observed from one sea to the next acro

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Roque, Fabio de Oliveira, Susana Trivinho-Strixino, Mário Jancso, and Evelise N. Fragoso. "Records of chironomidae larvae living on other aquatic animals in Brazil." Biota Neotropica 4, no. 2 (2004): 1–9. http://dx.doi.org/10.1590/s1676-06032004000200018.

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In this study, we report forty-nine cases of Chironomidae larvae living on other animals in Brazilian aquatic ecosystems, including a wide range of hosts, such as hydrozoans, snails, insects and fish. We also discuss some empirical difficulties to establish the ecological interactions between chironomids and their hosts.

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Nascimento, Lorena Silva, Miodeli Nogueira Júnior, Emanuelle Macêdo Viana, and José Guilherme F. Bersano. "Biodiversity of planktonic hydrozoans from a subtropical estuary: evidence of assemblage structure change." Journal of the Marine Biological Association of the United Kingdom 99, no. 3 (2018): 551–62. http://dx.doi.org/10.1017/s0025315418000486.

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The present study provides a comprehensive survey of the planktonic hydrozoan fauna from the Paranaguá Estuarine System (PES; southern Brazil, 25°S 48°W), a subtropical estuary considered a Natural World Heritage site by UNESCO. Extensive collections were performed throughout the estuary in five sampling campaigns during the summer and winter periods of 2012 and 2013 and summer of 2014, totalling 185 samples. About 49,000 organisms were analysed which together with the few previous records resulted in a total of 36 hydromedusae and three siphonophore species. We highlight the presence of Cnido

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Kubota, Shin. "Constant timing of medusa release in bivalve-inhabiting hydrozoans of the genus Eugymnanthea (Hydrozoa: Leptomedusae: Eirenidae)." Journal of the Marine Biological Association of the United Kingdom 88, no. 8 (2008): 1607–9. http://dx.doi.org/10.1017/s0025315408001446.

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At the end of the breeding season in autumn, under natural conditions, mature medusae of Eugymnanthea japonica are released from its host Mytilus galloprovincialis at night-time. In laboratory experiments, mature medusae of the congeneric species E. inquilina are also released at night-time in autumn. At that time of the year, sunset is earlier and the water temperature is lower than in summer, when, under natural conditions, medusa release of E. japonica takes place at sunset instead. The release thus takes place at the same hours of the day in summer as well as in autumn. The circadial timin

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Ramos-Morales, Axl, Julio D. Gómez-Vásquez, María del Socorro García-Madrigal, and J. Rolando Bastida-Zavala. "Fouling invertebrates from PVC plates at Chahué Marina, Oaxaca, Southern Pacific coast of Mexico." Check List 20, no. (3) (2024): 728–60. https://doi.org/10.15560/20.3.728.

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The port fouling fauna from Mexico has recieved greater study in the last 15 years. By improving our knowledge of fouling invertebrates on artificial substrates on the Southern Pacific coast of Mexico, we can better understand their distribution and prevent bioinvasions. The specimens listed in this present study come from PVC plates that were placed between June 2019 to June 2020 submerged at 1 m depth, on four docks of the Chahué Marina, Oaxaca, Mexico. Forty-four taxa, representing nine phyla were identi-fied: Sipuncula (1 species), Entoprocta (1), Bryozoa (3), Arthropoda (3), Porifera (4),

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Schmich, Jurgen, Yulia Kraus, Doris De Vito, Daria Graziussi, Ferdinando Boero, and Stefano Piraino. "Induction of reverse development in two marine Hydrozoans." International Journal of Developmental Biology 51, no. 1 (2007): 45–56. http://dx.doi.org/10.1387/ijdb.062152js.

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GALEA, HORIA R., and DIRK SCHORIES. "Some hydrozoans (Cnidaria) from King George Island, Antarctica." Zootaxa 3321, no. 1 (2012): 1. http://dx.doi.org/10.11646/zootaxa.3321.1.1.

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Twenty one species of shallow-water, benthic hydrozoans, belonging to nine families and fourteen genera, were found ina collection gathered from King George Island, South Shetland islands, during 2010 and 2011. Hydractinia angusta Hart-laub, 1904, Staurocladia charcoti (Bedot, 1908), Candelabrum penola (Manton, 1940), Orthopyxis norvegiae (Broch,1948), and Silicularia pedunculata (Jäderholm, 1904) are redescribed. Additional notes are provided on Schizotricha tur-queti Billard, 1906. Sertularella gaudichaudi (Lamouroux, 1824) is recognized as one of the most widely-distributed member of its ge

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Sanders, Steven M., Matthew K. Travert, and Paulyn Cartwright. "Frizzled3 expression and colony development in hydractiniid hydrozoans." Journal of Experimental Zoology Part B: Molecular and Developmental Evolution 334, no. 5 (2020): 311–17. http://dx.doi.org/10.1002/jez.b.22980.

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CANTERO, ÁLVARO L. PEÑA, and MARINA FRESNEDA MARZAL. "Benthic hydroids (Cnidaria: Hydrozoa) from off George V Coast (East Antarctica)." Zootaxa 4441, no. 1 (2018): 121. http://dx.doi.org/10.11646/zootaxa.4441.1.7.

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Hydrozoans are one of the main and most characteristic zoological groups of Antarctic benthic communities, yet there are Antarctic areas where the hydrozoan fauna is completely unknown or scarcely known as off George V Coast (East Antarctica). Hitherto, only two studies have dealt with hydroids from this area and only 16 species have been reported. The present study contributes to increase knowledge of the benthic hydroid fauna off George V Coast by studying material collected during a sampling survey associated with the CEAMARC project. A total of 12 species of benthic hydroids were found. An

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Santiago-Valentín, Jeimy Denisse, Eric Bautista-Guerrero, Alma Paola Rodríguez-Troncoso, María del Carmen Franco-Gordo, Mauricio Alejandro Razo-López, and Enrique Godínez-Domínguez. "Morphological and Molecular Identification of Porpita porpita (Hydrozoa: Porpitidae) Larval and Colonial Phases." Diversity 16, no. 7 (2024): 425. http://dx.doi.org/10.3390/d16070425.

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Porpita porpita is a colonial polymorphic hydrozoan distributed in temperate and tropical zones. This species, like most hydrozoans, possesses a metagenetic life cycle with alternating life forms: medusa stage, polypoid colony, and planula larva. However, a characterization of its early stages of development is still lacking. For this study, an integrative description of the larval stages and the hydroid colony was performed using molecular and histologic tools. The results show that P. porpita develops through three larval stages: preplanula, planula, and premetamorphic planula. The preplanul

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Song, Xikun, Cinzia Gravili, Bernhard Ruthensteiner, Mingxin Lyu, and Jianjun Wang. "Incongruent cladistics reveal a new hydrozoan genus (Cnidaria : Sertularellidae) endemic to the eastern and western coasts of the North Pacific Ocean." Invertebrate Systematics 32, no. 5 (2018): 1083. http://dx.doi.org/10.1071/is17070.

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Molecular phylogenetics provides objective references for zoological systematics which sometimes are inconsistent with morphological data. This applies particularly for some primitive phyla such as Cnidaria. The marine hydrozoan Symplectoscyphus turgidus (Sertularellidae) is a recent questionable case reported to occupy an unexpected phylogenetic position and suggested to belong to a new genus. However, its position, based on a single Californian specimen, seemed doubtful. Here we contributed 16S, 18S and 28S rRNA data of another morphologically related species from the Yellow Sea, forming a m

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Prudkovsky, Andrey, Alexandra Vetrova, and Stanislav Kremnyov. "What Does “ITS” Say about Hybridization in Lineages of Sarsia (Corynidae, Hydrozoa) from the White Sea?" Diversity 15, no. 5 (2023): 675. http://dx.doi.org/10.3390/d15050675.

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Hydrozoans are widely known for their complex life cycles. The life cycle usually includes an asexual benthic polyp, which produces a sexual zooid (gonophore). Here, we performed an extensive analysis of 183 specimens of the hydrozoan genus Sarsia from the White Sea and identified four types of gonophores. We also compared the type of gonophore with haplotypes of the molecular markers COI and ITS. Analysis of COI sequences recovered that the studied specimens related to the species S. tubulosa, S. princeps and S. lovenii, and that the S. lovenii specimens divided into two COI haplogroups. More

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Marques, Antonio C., André C. Morandini, and Alvaro E. Migotto. "Synopsis of knowledge on Cnidaria Medusozoa from Brazil." Biota Neotropica 3, no. 2 (2003): 1–18. http://dx.doi.org/10.1590/s1676-06032003000200007.

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A synopsis of knowledge concerning Medusozoa (Cnidaria) along the Brazilian coast is presented. We generated a data list with all records of medusozoans from Brazil, including information on the distribution of the species and the phase (polyp or medusa) recorded. Currently the number of species of Medusozoa recorded from Brazil is 377 (205 genera and 82 families), with 348 species of hydrozoans, 22 scyphozoans, 3 cubozoans and 1 staurozoan. Geographical and historical analyses were carried out based on the data list. The geographical analysis reveals that knowledge on biodiversity of the grou

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Ramos-Morales, Axl, Julio D. Gómez-Vásquez, María del Socorro García-Madrigal, and J. Rolando Bastida-Zavala. "Fouling invertebrates from PVC plates at Chahué Marina, Oaxaca, Southern Pacific coast of Mexico." Check List 20, no. 3 (2024): 728–60. http://dx.doi.org/10.15560/20.3.728.

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The port fouling fauna from Mexico has recieved greater study in the last 15 years. By improving our knowledge of fouling invertebrates on arti&#64257;cial substrates on the Southern Paci&#64257;c coast of Mexico, we can better understand their distribution and prevent bioinvasions. The specimens listed in this present study come from PVC plates that were placed between June 2019 to June 2020 submerged at 1 m depth, on four docks of the Chahu&eacute; Marina, Oaxaca, Mexico. Forty-four taxa, representing nine phyla were identi-&#64257;ed: Sipuncula (1 species), Entoprocta (1), B

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