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| Registros recuperados: 26 | |
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| Schrieken, N.; Gittenberger, A.; Coolen, J.W.P.; Lengkeek, W.. |
| As most of the sea bottom in the Dutch part of the North Sea consists of sand, marine fauna that live in association with hard substrates are rarely monitored. We report here on the results of a species inventory in June 2011 done by scuba-diving while focusing on a wreck on the Dogger Bank and on rocky bottoms on the Cleaver Bank. This resulted in various new records of species for the Dutch part of the North Sea. This result appeared for a large part linked to the added value of monitoring with scuba-divers. It is therefore concluded that scuba-divers should be used in addition to the more traditional monitoring methods in which dredges and grabs are used, if one aims at getting an accurate view of the biodiversity present in marine regions like the... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Biodiversity; Hard substrata; Netherlands; Marine; Scuba-diving; 42.75. |
| Ano: 2013 |
URL: http://www.repository.naturalis.nl/record/586863 |
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| Gittenberger, A.; Hoeksema, B.W.. |
| Examination of about 60,000 scleractinian corals of the families Dendrophylliidae, Euphylliidae and Fungiidae for the presence of associated wentletrap snails (Gastropoda: Epitoniidae) revealed various ectoparasitic life history strategies. Twenty Indo-Pacific wentletrap species were found, which were either host-specific or generalist. Most species were associated with mushroom corals, especially free-living species belonging to the Fungiidae. Snails showed different preferences with regard to their position relative to mushroom corals, the host’s size and its substrate. No preferences for depth were found. Infestation rates of mushroom corals in multi-species assemblages were negatively correlated with coral densities, which indicates that epitoniid... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Coral-mollusc associations; Fungiidae; Indo-Pacific; Parasitic snails; Scleractinia; 42.73. |
| Ano: 2013 |
URL: http://www.repository.naturalis.nl/record/436822 |
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| Gittenberger, A.. |
| This is the first record of an association between a wentletrap species (Gastropoda: Epitoniidae) and coral species of the Euphyllidae (Scleractinia), i.e. Plerogyra simplex and P. diabolotus. While describing Epitonium hartogi spec. nov., special attention is given to the ontogenetic development within the eggcapsules, the structure and microsculpture of the opercula, the radulae, and the microsculpture on the radular jaws. These characters proved to be at least partly diagnostic in the epitoniid species Epitonium albidum, E. billeeanum, E. costulatum, E. hoeksemai, E. ingridae, E. lochi, E. millecostatum, E. pyramidalis, E. twilae, E. ulu and Nitidiscala tincta. Spiculae-like crystals covering the epitoniid egg-capsules are described; such crystals are... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Indo-Pacific; Parasites; Coral reefs; Coral/mollusc associations; Egg-capsules; Veligers; Epitoniidae; Epitonium; Billeeanum; Hartogi; Larval development; Radulae; Jaws; Euphyllidae; Plerogyra; 42.73; 42.79. |
| Ano: 2003 |
URL: http://www.repository.naturalis.nl/record/220301 |
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| Lengkeek, W.; Coolen, J.W.P.; Gittenberger, A.; Schrieken, N.. |
| This paper reports on observations made during wreck dive expeditions in 2010-2012, in order to investigate the ecological relevance of shipwrecks on the Dutch Continental Shelf (dcs). Shipwrecks are biodiversity hotspots. The number of species recorded on shipwrecks is similar to the number of species found in soft bottoms of the entire dcs. The soft substrates, however, represent a vastly larger habitat on the dcs than the shipwrecks. Amongst many other taxa, juvenile and large Atlantic cod, linear skeleton shrimp, goldsinny wrasses and leopard spotted gobies were found in the shipwreck habitats. The presence of these important species and their absence from many other habitats, illustrate that shipwrecks function as key habitats, nurseries, and refugia... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Shipwrecks; Netherlands; Biodiversity; 42.75. |
| Ano: 2013 |
URL: http://www.repository.naturalis.nl/record/586861 |
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| Gittenberger, A.; Loon, W.M.G.M. van. |
| The relative sensitivities of 309 common invertebrate species in Dutch marine waters are presented for environmental and anthropogenic pressures like organic enrichment, sedimentation and fisheries. The species were furthermore appointed to trophic groups like suspension and deposit feeders. The Dutch Ministry of Infrastructure and the Environment uses these data when calculating the Benthic Ecosystem Quality Index 2 and the Infaunal Trophic Index. These metrics aid in the mandatory monitoring of ecological quality for example for the European Water Framework Directive. The common Dutch species were selected based on their abundance according to, 1. the mwtl dataset including results of on-going monitoring programs issued by the Ministry, 2. the... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Macrozoobenthos; Marine; Netherlands; Environment; 42.75. |
| Ano: 2013 |
URL: http://www.repository.naturalis.nl/record/586903 |
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| Registros recuperados: 26 | |
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