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Registros recuperados: 32 | |
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Hartog, J.C. den. |
The first Western Palearctic record of a Red-footed Booby Sula sula (L., 1766), a brown whitetailed morph observed on Cima (Cape Verde Islands), is described. The status of this species in the tropical South Atlantic Ocean is evaluated. At present, Fernando de Noronha is the only South Atlantic stronghold of the species (ca. 4000 individuals; cf. Oren, 1984). The species has disappeared, or almost so, from other islands (St. Helena: absent; Ascension:0-30 individuals; Ilha da Trindade: less than 100 pairs). A link may exist between the apparent recent increase of the population of Fernando de Noronha and the apparent recent decline of the Trindade population. It seems possible that the Trindade population for some unknown reason has migrated to Fernando de... |
Tipo: Article / Letter to the editor |
Palavras-chave: Sula sula; Cape Verde Islands; South Atlantic Islands; Status; 42.83. |
Ano: 1987 |
URL: http://www.repository.naturalis.nl/record/318544 |
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Hartog, J.C. den. |
Bunodes biscayensis Fischer, 1874, a species of Actiniaria described from Moulleau, Arcachon, south-western coast of France, and never recorded since, was rediscovered in July 1985 and found again in 1986 and 1987 in several localities along the French "Côte Basque" between the mouth of the river Adour and St. Jean-de-Luz. The species is here redescribed and referred to Bunodosoma Verrill, 1899, a genus of tropical and subtropical Atlantic and West-American intertidal and shallow water forms, hitherto not recorded from the Mediterranean and/or the Atlantic coast of Europe. Speculations are advanced as to the possible further distribution of B. biscayensis. A discussion is added concerning the morphological terms verruca and vesicle. The study is completed... |
Tipo: Article / Letter to the editor |
Palavras-chave: Actiniaria; Bunodosoma biscayensis; Verruca; Vesicle; Nematocysts; Distribution; France; Côte Basque; 42.72. |
Ano: 1987 |
URL: http://www.repository.naturalis.nl/record/318818 |
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Hartog, J.C. den; Clarke, M.R.. |
Data are presented on the diet of Cory's Shearwater Calonectris diomedea borealis (Cory, 1881) resulting from stomach investigations based on 18 birds from Hierro (Canary Islands), 5 from Selvagem Grande (Selvagens or Salvage Islands), 2 from São Miguel and 1 from São Jorge (Azores), collected between 1977 and 1981. These data confirm the general idea that this shearwater feeds principally on fish and squid. The glandular stomachs of 9 birds from Hierro contained significant quantities of food, varying in wet weight from ca. 4-40 gm; in four cases more or less complete squids were present, all Ommastrephes bartrami (Le Sueur, 1821). In addition, the gizzards of all 26 birds, except one, contained fragments of squid beaks belonging to 12 species. Several of... |
Tipo: Article / Letter to the editor |
Palavras-chave: Procellariidae; Calonectris diomedea borealis (Cory; 1881); Diet; Stomach contents; Cephalopoda; SE North Atlantic; Macaronesia; 42.83. |
Ano: 1996 |
URL: http://www.repository.naturalis.nl/record/318278 |
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Hartog, J.C. den; Nierop, M.M. van. |
Microscopical investigations of the gut contents of six individuals of Dermochelys coriacea from southern England and the North Sea revealed the presence in all of these of numerous nematocysts, mainly scyphozoan. Only six species of Scyphozoa occur in British shallow waters and in the North Sea, viz., Pelagia noctiluca (Forskål), Chrysaora hysoscella (L.), Aurelia aurita (L.), Cyanea capillata (L.), C. lamarckii (L.) and Rhizostoma octopus (L.). For the purpose of comparison and identification an inventory was made of the cnidom of these six species (based on preserved material). Nematocysts of one or more of these species appeared to be present in each of the turtles, all six species being represented. One of the turtles in addition appeared to have... |
Tipo: Article / Letter to the editor |
Palavras-chave: Scyphozoa; Leptomedusae; Siphonophora; Testudines; Dermochelys; Nemato- cysts; British Isles; Netherlands; Food; Digestive tract; Anatomy; Functional morphology.; 42.82. |
Ano: 1984 |
URL: http://www.repository.naturalis.nl/record/317798 |
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Chintiroglou, Ch.; Hartog, J.C. den. |
A small collection of four species of Actiniaria, partly representing new records for Greece and the eastern Mediterranean, is described and discussed. These four species are: Bunodeopsis strumosa Andres, 1881, Edwardsia claparedii (Panceri, 1869), Actinia cari delle Chiaje, 1825, and Phymanthus pulcher (Andres, 1883). |
Tipo: Article / Letter to the editor |
Palavras-chave: Actiniaria; New records; Greece; Ionian and Aegean Seas; Eastern Mediterranean; Nematocysts; 42.72. |
Ano: 1995 |
URL: http://www.repository.naturalis.nl/record/319061 |
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Fautin, D.G.; Hartog, J.C. den. |
The sea anemone species Isactinernus quadrilobatus Carlgren, 1918, and Synactinernus flavus Carlgren, 1918, which were described in new monotypic genera from few specimens collected in southern Japan, are synonymized, based on many more specimens from the South Pacific. As well as the geographic range, the depth range of this species has been extended to 110-700 m. The species had been distinguished primarily on whether the oral disc had four lobes (I. quadrilobatus) or eight (Synactinernus flavus) – we conclude their number is largely related to size of the animal. Other features that Carlgren had used to differentiate the genera (and species) are inconsistently present and do not correlate with lobe number. |
Tipo: Article / Letter to the editor |
Palavras-chave: Endocoelantheae; Mesenteries; Biogeography; Synactinernus flavus; 42.79. |
Ano: 2003 |
URL: http://www.repository.naturalis.nl/record/220298 |
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Hartog, J.C. den; Ocaña, O.; Brito, A.. |
Species of Corallimorpharia collected during the CANCAP expeditions in the south-eastern part of the North Atlantic are described and discussed, altogether five species belonging to three genera of Corallimorphidae: the shallow water forms Corynactis viridis Allman, 1846, Pseudocorynactis caribbeorum den Hartog, 1980, and P. caboverdensis spec. nov., and the deep-sea forms Corallimorphus cf. atlanticus Carlgren, 1934, and C. ingens Gravier, 1918. The taxonomic status of the representatives of the genus Corynactis Allman, 1846, is discussed. All temperate to subtropical species described so far belong to a group of closely related allopatric taxa forming the Corynactis viridis-complex, possibly representing a single species only. The colours of Corynactis... |
Tipo: Article / Letter to the editor |
Palavras-chave: Corallimorpharia; Corallimorphidae; Corallimorphus; Corynactis; Pseudocorynactis; Sideractis; Nectactis; Nematocysts; Ontogeny; Distribution; Feeding; CANCAP-project; South-eastern North Atlantic; Macaronesia.; 42.72. |
Ano: 1993 |
URL: http://www.repository.naturalis.nl/record/317646 |
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Hartog, J.C. den. |
Two new Ceriantharia, Pachycerianthus curacaoensis and Arachnanthus nocturnus, both from the Caribbean region, are described. It is recommended to avoid the terms proto- and metamesenteries in taxonomie descriptions. The cnidom of the Ceriantharia is discussed; a subdivision of the spirulae (=b-rhabdoids) and penicilli ( = p-rhabdoids) differing from that of Schmidt (1972) is given. The anoplotelic character of the terminal tube of the penicilli (Schmidt, 1972) is doubted on the basis of light microscopical investigations. Mainly on the basis of the study of Botruanthus benedeni (Torrey & Kleeberger, 1909) (Botrucnidiferidae), the 2 newly described species (respectively belonging to the Cerianthidae and the Arachnactidae), and of the data available in... |
Tipo: Article / Letter to the editor |
Palavras-chave: 42.72. |
Ano: 1977 |
URL: http://www.repository.naturalis.nl/record/319294 |
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Hartog, J.C. den. |
Op 1 juni 1982, 's morgens om 9 uur, vertrok het Nederlandse oceanografische vaartuig "Tydeman" uit de haven van Santa Cruz de Tenerife voor een marien-biologische expeditie naar de Kaapverdische eilanden. Aan boord bevond zich een team van onderzoekers en assistenten van het Rijksmuseum van Natuurlijke Historie, het Rijksherbarium (beiden uit Leiden) en het Geologisch lnstituut van de Universiteit van Groningen. De expeditie paste in het kader van het zogenaamde CANCAP-project (no. 45) van genoemde instituten, waarmee reeds in 1976 werd aangevangen. Drs. J.C. den Hartog, medewerker van het Rijksmuseum van Natuurlijke Historie, was aan boord van de "Tydeman" en zette zijn bevindingen voor dit tijdschrift op papier. |
Tipo: Article / Letter to the editor |
Palavras-chave: Capeverdian Islands; Marine biology; CANCAP; 42.94. |
Ano: 1985 |
URL: http://www.repository.naturalis.nl/record/460098 |
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Hartog, J.C. den. |
Volgens gangbare inzichten zijn vrijwel alle oceanische eilanden uit zee opgerezen, wat impliceert dat ze oorspronkelijk kaal en zonder enig leven waren. Biologen zijn daarom bijzonder geïnteresseerd in het karakter en de herkomst van de huidige flora en fauna van die eilanden en in de kolonisatieprocessen. In het algemeen kan men stellen dat de kans op kolonisatie kleiner is naarmate een eiland verder van het vasteland (of van een ander eiland) verwijderd ligt. In feite is de zaak natuurlijk wel iets gecompliceerder, en spelen allerlei factoren een rol. Voor landorganismen zijn dit onder meer de klimatologische en meteorologische omstandigheden in het te overbruggen gebied, en de vestigingsmogelijkheden in de nieuwe omgeving. Kolonisatie door mariene... |
Tipo: Article / Letter to the editor |
Palavras-chave: Islands; Transformation; Colonisation; Endemism; Saint Helena; 42.94. |
Ano: 1985 |
URL: http://www.repository.naturalis.nl/record/460100 |
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Registros recuperados: 32 | |
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