SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

Reijnen, B.T.; Hoeksema, B.W.; Gittenberger, E..

Ovulid gastropods and their octocoral hosts were collected along the leeward coast of Curaçao, Netherlands Antilles. New molecular data of Caribbean and a single Atlantic species were combined with comparable data of Indo-Pacific Ovulidae and a single East-Pacific species from GenBank. Based on two DNA markers, viz. CO-I and 16S, the phylogenetic relationships among all ovulid species of which these data are available are reconstructed. The provisional results suggest a dichotomy between the Atlantic and the Indo-Pacific taxa. Fully grown Simnialena uniplicata closely resembles juvenile Cyphoma gibbosum conchologically. Cymbovula acicularis and C. bahamaensis might be synonyms. The assignments of Caribbean host species for Cyphoma gibbosum, C....

Berau: een ruim gevarieerd kustgebied in Oost-Kalimantan

Palavras-chave: Anthozoa; Alcyonacea; Caribbean; Curaçao; Molecular phylogeny; Symbiosis; 42.73.

Ano: 2010

URL: http://www.repository.naturalis.nl/record/336926

In eerdere afleveringen van de serie 'Met Naturalis in zee' is verslag gedaan over een expeditie naar Bali, die in 2001 door Naturalis werd gehouden. In oktober 2003 ging het zeeteam van Naturalis naar Oost-Kalimantan voor nieuwe verkenningen. Deze expeditie maakte deel uit van een groot Indonesisch-Nederlands programma, waarin onderzoekers van diverse instituten participeerden. Dit artikel is het eerste in een reeks over allerlei aspecten van het onderwaterleven van het Berau gebied. Een gebied dat niet alleen interessant is voor onderzoek, maar ook geschikt voor een avontuurlijke vakantiereis.

Naar aanleiding van een Loligo - rugschilden - invasie op Terschelling

Palavras-chave: Koraalrifonderzoek; Indo-Pacifisch gebied; Berau; Oost-Kalimantan; 42.65.

Ano: 2004

URL: http://www.repository.naturalis.nl/record/270184

Hoeksema, B.W.; Hoeksema, D..

Species diversity of stony corals and mushroom coral sizes

Palavras-chave: Loligo; Loligo forbesi; Loligo vulgaris; Rugschilden; Terschelling; 42.73.

Ano: 1979

URL: http://www.repository.naturalis.nl/record/268994

Habitat preferences of coral-associated wentletrap snails (Gastropoda: Epitoniidae)

Tipo: Part of book or chapter of book

Palavras-chave: Scleractinia; Millepora; Heliopora; Tubipora; Fungiidae; Seychelles; 42.72.

Ano: 1994

URL: http://www.repository.naturalis.nl/record/268534

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...

Het erwtekrabbetje, Pinnotheres pisum (L.), als commensaal van de paardemossel, Modiolus modiolus (L.)

Palavras-chave: Coral-mollusc associations; Fungiidae; Indo-Pacific; Parasitic snails; Scleractinia; 42.73.

Ano: 2013

URL: http://www.repository.naturalis.nl/record/436822

Long-term changes in coral assemblages under natural and anthropogenic stress in Jakarta Bay (1920–2005)

Palavras-chave: Pinnotheres pisum; Modiolus modiolus; Commensaal; 42.73; 42.74.

Ano: 1981

URL: http://www.repository.naturalis.nl/record/269034

Meij, S.E.T. van der; Suharsono; Hoeksema, B.W..

Coral reefs in Jakarta Bay have been subjected to scientific studies since the 1920s. Also from that time on biological collections were made. The reefs in the Jakarta Bay have been under long-term natural and anthropogenic stress. With the biological collections and historical documents the coral species richness in Jakarta Bay around 1920 was reconstructed. New data from this bay and the adjacent offshore Thousand Islands archipelago were obtained during a 2005 research expedition. A comparison of the coral assemblages between 1920 and 2005 reveals a clear decline in species numbers. The most prominent results include the near-shore disappearance of species belonging to the families Acroporidae, Milleporidae, and to a lesser extent Poritidae. The overall...

The mushroom coral as a habitat

Palavras-chave: Biodiversity change; Global change; Kepulauan Seribu; Reef degradation; Scientific collections; Scleractinia.

Ano: 2010

URL: http://www.repository.naturalis.nl/record/409044

Hoeksema, B.W.; Meij, S.E.T. van der; Fransen, C.H.J.M..

The evolution of symbiotic relationships involving reef corals has had much impact on tropical marine biodiversity. Because of their endosymbiotic algae (zooxanthellae) corals can grow fast in tropical shallow seas where they form reefs that supply food, substrate and shelter for other organisms. Many coral symbionts are host-specific, depending on particular coral species for their existence. Some of these animals have become popular objects for underwater photographers and aquarists, whereas others are hardly noticed or considered pests. Loss of a single coral host species also leads to the disappearance of some of its associated fauna. In the present study we show which mushroom corals (Scleractinia: Fungiidae) are known to act as hosts for other...

New records of Fungiacava eilatensis Goreau et al., 1968 (Bivalvia, Mytilidae) boring into Indonesian mushroom corals (Scleractinia, Fungiidae)

Palavras-chave: Coral reefs; Host-specificity; Interspecific associations; Marine biodiversity; Phylogenetic ecology; Stony corals; 42.65.

Ano: 2012

URL: http://www.repository.naturalis.nl/record/431754

Hoeksema, B.W.; Kleemann, K..

New observations on endoparasites in mushroom corals at South Sulawesi and Bali resulted in eight coral host records of the mytilid bivalve Fungiacava eilatensis Goreau et al., 1968, bringing the total to 14. The host corals were observed in various habitats, most frequently on sandy substrates. The largest numbers of parasitic bivalves (>10 individuals) were found in large attached mushroom coral hosts of the genus Podabacia.

New observations on scleractinian corals from Indonesia: 2. Sipunculan-associated species belonging to the genera Heterocyathus and Heteropsammia

Palavras-chave: Bivalvia; Mytilidae; Fungiacava; Scleractinia; Fungiidae; Indonesia; South Sulawesi; Bali; Endoparasitism; 42.72; 42.73.

Ano: 2002

URL: http://www.repository.naturalis.nl/record/268894

Hoeksema, B.W.; Best, M.B..

Three Indonesian species of Heterocyathus and two of Heteropsammia are briefly diagnosed. Remarks are given on their synonymy, phenotypic variation, and ecology. All five species are found on soft substrata in the proximity of coral reefs and live in association with a sipunculan worm. This interspecific assocation is discussed with regard to whether it is mutualistic or parasitic.

Vinstralen in vis en gruis

Palavras-chave: Scleractinia; Free-living reef corals; Mutualism; Parasitism; Sipunculan worm; Indonesia; 42.72.

Ano: 1991

URL: http://www.repository.naturalis.nl/record/317921

Uit het artikel "Over de rugschildjes van Sepolia atlantica en andere kleine inktvisjes" (Buizer & Doeksen, 1977) blijkt dat resten van vinstralen van in zee levende beenvissen, behalve in die vissen zelf, ook in schelpengruis op het strand aangetroffen kunnen worden. In het laatste geval is echter het verband verloren gegaan, dat er bestaat tussen de plaats en de bouw van de vinstraal enerzijds en de funktie daarvan anderzijds. In het kort volgt hieronder het resultaat van een onderzoekje naar de bouw en de funktie van met name de staartvinstralen, uitmondend in een vergelijking met de bevindingen van Buizer & Doeksen.

Prey selection of corallivorous muricids at Koh Tao (Gulf of Thailand) four years after a major coral bleaching event

Palavras-chave: Beenvissen; Vinstralen; 42.81.

Ano: 1978

URL: http://www.repository.naturalis.nl/record/268954

Moerland, M.S.; Scott, C.M.; Hoeksema, B.W..

Corallivorous Drupella (Muricidae) snails at Koh Tao are reported to have extended their range of prey species following a major coral bleaching event in 2010. Populations of their preferred Acropora prey had locally diminished in both size and abundance, and the snails had introduced free-living mushroom corals in their diet. Although the coral community largely recovered, the Drupella population grew and reached outbreak proportions. For this study, corallivorous muricids at Koh Tao were studied more intensively to examine their identities, distribution and prey choice four years after the bleaching event. Drupella rugosa was identified as the major outbreak species and occurred at densities > 3 m-2 in depth ranges of 2-5 and 5-8 m. The density of D....

Cantharellus noumeae (gen. nov., spec. nov.), a new scleractinian coral (Fungiidae) from new Caledonia

Palavras-chave: Corallivory; Drupella; Morula; Muricidae; Resource selection.

Ano: 2016

URL: http://www.repository.naturalis.nl/record/613891

Hoeksema, B.W.; Borel Best, M..

A new monospecific genus in the coral family Fungiidae (Scleractinia) is described. Its affinities with two other genera are discussed.

Larger benthic foraminifera and their distribution patterns on the Spermonde shelf, South Sulawesi

Palavras-chave: Scleractinia; Fungiidae; New genus; New species; New Caledonia; 42.72.

Ano: 1984

URL: http://www.repository.naturalis.nl/record/318550

Renema, W.; Hoeksema, B.W.; Hinte, J.E. van.

A systematic description of the distributional pattern of 20 species of larger benthic foraminifera on the Spermonde Archipelago and their relation with environmental parameters is presented. Around 13 islands transects at the exposed and leeward slope were sampled. Apart from parameters like substrate type, hydrodynamic energy and light intensity (directly related to depth) also nutrient availability and environmental stabiltity determine the distribution over the shelf. Some of the species, and especially the calcarinids, are less specialised to some of these parameters than in other areas. Elphidium craticulatum, showing chloroplast husbandry, is an important fauna component.

Historical biogeography of Fungia (Pleuractis) spp. (Scleractinia: Fungiidae), including a new species from the Seychelles

Palavras-chave: Benthic foraminifera; Spermonde Archipelago; Sulawesi; Distribution; Ecology; 42.79.

Ano: 2001

URL: http://www.repository.naturalis.nl/record/219452

An update of the phylogeny and biogeography of mushroom coral species belonging to Fungia (Pleuractis) is presented. Among the five species of this monophyletic group, one is described as new to science. This species, Fungia seychellensis spec, nov., was discovered during the Netherlands Seychelles Expedition (1992-1993) in the framework of the Netherlands Indian Ocean Programme 1990/1995.

Evaluation of the ecological function of amphitoxin in the reef-dwelling sponge Callyspongia (Euplacella) biru (Haplosclerida: Callyspongiidae) at southwest Sulawesi, Indonesia

Palavras-chave: Scleractinia; Fungiidae; Fungia; Pleuractis; Mushroom corals; New species; Phylogeny; Biogeography; Seychelles; 42.72.

Ano: 1993

URL: http://www.repository.naturalis.nl/record/319240

Voogd, N.J. de; Haftka, J.J.H.; Hoeksema, B.W..

The ecological function of the secondary metabolite amphitoxin produced by Callyspongia (Euplacella) biru is evaluated by a forced confrontation with the free-living scleractinian coral Fungia fungites at different exposure times. Our major goal was to determine whether such a forced confrontation with a spatial competitor would cause a significant change in the concentration of amphitoxin in the sponge tissue, indicating a regulatory mechanism of amphitoxin production. Firstly, the concentrations of amphitoxin of sponge fragments submitted to forced confrontation with a mushroom coral did not differ between the exposure times. Secondly, all sponge fragments, including the controls had a consistently lower amphitoxin concentration during the course of the...

Het mysterie van de hellevuur zeeanemoon

Palavras-chave: Amphitoxin; Callyspongia (Euplacella) biru; Fungia fungites; Indonesia; Porifera; Spatial interaction; 42.72.

Ano: 2005

URL: http://www.repository.naturalis.nl/record/214340

In 'Met Naturalis in zee' van mei 2004 komt brandgevaar onderwater aan de orde. Aanleiding is een onderzoek aan brandkoralen, in het Engels 'fire corals' genoemd. Duikers en snorkelaars leren deze Millepora koralen snel herkennen na onbedoeld contact met het koraaloppervlak. Uit kleine poriën in dat gladde opppervlak steken haarfijne tentakels die netelkapsels bevatten. Daar brandt iemand zich meestal geen tweede keer aan. Dat kan heel anders bij dieren die zo goed gecamoufleerd zijn en zo venijnig pijn doen, dat het slachtoffer zich vaak niet realiseert wat hem is overkomen en ook niet direct ziet wie de boosdoener is.

Palavras-chave: Millepora; Brandkoraal; 42.72.

Ano: 2007

URL: http://www.repository.naturalis.nl/record/270359

Riffauna van Bali rijker

In de inleiding van de serie 'Met Naturalis in zee' (Onderwatersport januari/februari 2003) werd een overzicht gegeven van 20 jaar koraalrifonderzoek door Naturalis in de Indo-Pacific. In deze aflevering wordt een beeld gegeven van de recente Naturalis expeditie naar Bali met enkele bijzondere waarnemingen. In de komende aflevering zal de aandacht worden gevestigd op enkele diersoorten van en nabij Bali die voor het eerst en nog nooit elders zijn waargenomen.

Mesophotic mushroom coral records at Brunei Darussalam support westward extension of the Coral Triangle to the South China Sea waters of Northwest Borneo

Palavras-chave: Koraalrifonderzoek; Indo-Pacifisch gebied; 42.65.

Ano: 2003

URL: http://www.repository.naturalis.nl/record/270183

Lane, D.J.W.; Hoeksema, B.W..

This communication reports the discovery of two additional fungiid coral species, Cycloseris hexagonalis and Lithophyllon spinifer, from a relatively deep shelf reef in Brunei waters. These new records plus two earlier excluded ones, Cycloseris explanulata and C. wellsi, raise the known number of mushroom coral species at this Northwest Borneo location to 37 which is comparable to the number (n=35) reported for reefs of the nearby Tungku Abdul Rahman Park/Kota Kinabalu area, outside but close to the currently recognized northwest boundary of the zone of maximum marine biodiversity, the Coral Triangle (CT). The fungiid species richness at Brunei is compared with those of other sites in this eastern part of the South China Sea (SCS), and the adjacent...

Naar de eilanden van de Raja Ampat groep

Palavras-chave: Scleractinia; Fungiidae; Spratly; Coral reefs; Species richness.

Ano: 2016

URL: http://www.repository.naturalis.nl/record/613679

De laatste expeditie van het Naturalis zeeteam, waarvan melding is gemaakt in Onderwatersport, heeft plaatsgevonden in 2005. Deze expeditie ging naar de Baai van Jakarta en de Duizend Eilanden. Hoewel de verwachtingen niet hoog waren zijn er toch leuke vondsten gedaan. Al toonde een vergelijking met de Naturalis collecties ook aan dat er in de loop van zo'n 75 jaar soorten zijn verdwenen zo vlak bij Jakarta.