Consulta: creatorFacets:"Smol, N."
Registros recuperados: 10
Data/hora: 09/06/2024 13:47:47

Influence of temperature on the reproductive potential of two brackish-water harpacticoids (Crustacea: Copepoda)
Provedor de dados: 27
Autores: Heip, C.H.R.; Smol, N.
The reproductive potential of two harpacticoid copepods, &lt;i&gt;Tachidius discipes&lt;/i&gt; and &lt;i&gt;Paronychocamptus nanus&lt;/i&gt;, as measured by the intrinsic rate of natural increase, r&lt;sub&gt;m&lt;/sub&gt;, has been studied. The influence of temperature on all factors used in the calculation of r&lt;sub&gt;m&lt;/sub&gt; has been taken into account. Generation time, which has also been detected in a third species, &lt;i&gt;Nitocra typica&lt;/i&gt;, is the single factor which is most affected by temperature and which has the most pronounced effect on r&lt;sub&gt;m&lt;/sub&gt;. Values of the reproductive potential differ considerably according to temperature, and thus to the time of the year; during the spring bloom more than half the...
Tipo: Info:eu-repo/semantics/article
Ano: 1976
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3528

A 4-years' analysis of the meiofauna community of a dumping site for TiO&lt;sub&gt;2&lt;/sub&gt;-waste off the Dutch coast
Provedor de dados: 27
Autores: Smol, N.; Huys, R.; Vincx, M.
Sublittoral meiofauna of 24 stations was monitored over 4 years (1984-1987) in and around a dumping site for TiO&lt;sup&gt;2-&lt;/sup&gt; acid waste in the Southern Bight of the North Sea off the Dutch coast. The meiofauna was examined quantitatively and qualitatively with special reference to the nematode and the copepod community structure down to species level and to the trophic structure of the nematodes. Biological, sedimentological, geographical parameters and the concentration of several heavy metals were subject to multivariate statistical analysis and classification techniques to evaluate the impact of the TiO&lt;sup&gt;2-&lt;/sup&gt; dumping activities. The meiofauna is dominated by nematodes, copepods, gastrotrichs and turbellarians. There is a...
Tipo: Info:eu-repo/semantics/article
Ano: 1991
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2890

The culturing of some harpacticoid copepods from brackish water
Provedor de dados: 27
Autores: Smol, N.; Heip, C.H.R.
A culture method for three copepods from a brackish water pond in northern Belgium was established. The investigated species reproduced best on a diet of algae (&lt;i&gt;Tetraselmis suecica&lt;/i&gt; and &lt;i&gt;Phaeodactylum tricornutum&lt;/i&gt;) with addition of small amount of detritus from the habitat. Survival from nauplii to the adult stage varied between 60 and 90 %. A study of the influence of temperature showed that the duration of the naupliar stages of &lt;i&gt;Tachidius discipes&lt;/i&gt; is relatively prolonged with increasing temperature.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Estuarine organisms; Copepoda [copepods].
Ano: 1974
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3497

On the importance of &lt;i&gt;Protohydra leuckarti&lt;/i&gt; as a predator of meiobenthic populations
Provedor de dados: 27
Autores: Heip, C.H.R.; Smol, N.
The predator-prey system between the polyp &lt;i&gt;Protohydra leuckarti&lt;/i&gt; and the harpacticoid copepod &lt;i&gt;Tachidius discipes&lt;/i&gt; is investigated using the results of a 3 year field survey and laboratory experiments involving the cultivation of the species. In the field a close relationship between numbers of predator and prey was observed. The possible influence of environmental factors on this relationship is discussed.  A number of mathematical models is compared to investigate the possibility of realistic description of the system. It is concluded that, even during relatively long time intervals, the number of prey can be predicted from the reproductive potential of the prey on the one hand and the rate of predation and predator...
Tipo: Info:eu-repo/semantics/article
Ano: 1976
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3534

The systematics and ecology of free-living marine nematodes
Provedor de dados: 27
Autores: Heip, C.H.R.; Vincx, M.; Smol, N.; Vranken, G.
Nematodes are the most abundant metazoans in marine (littoral, estuarine, coastal and oceanic) sediments, extending from the high-water mark into the deepest oceanic trenches (Nicholas, 1975). All marine free-living nematodes are considered to be members of the meiobenthos; small organisms, mainly metazoans, which are separated from the larger macrobenthos either on a methodological basis (i.e. as all animals passing a 1 mm or a 0.5 mm sieve) or a taxonomic basis (i.e. particular animal groups such as Nematoda, Harpacticoida, Gastrotricha, Kinorhyncha, Tardigrada, Foraminifera etc. which consist exclusively or mainly of small species living in sediments). In most circumstances, nematodes are numerically the dominant group of the meiofauna. In fact, they...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ecology; Systematics; Taxonomy; Nematoda [Nematodes].
Ano: 1982
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3417

A rapid method of extracting meiobenthic nematodes and copepods from mud and detritus
Provedor de dados: 27
Autores: Heip, C.H.R.; Smol, N.; Hautekiet, W.
The extraction of nematodes and harpacticoid copepods from muddy sediments or sediments containing a large amount of organic detritus can be achieved through a series of centrifugations of the material in a sacharose solution of at least 900 g/l. The number of individuals appearing in the supernatant after each centrifugation forms a geometric series, with a ratio which is dependent on the amount of material, the concentration of the saccharose solution, and the acceleration of the centrifuge. Knowledge of this ratio allows an estimation of density after only one centrifugation. More than 90 % of the animals present in the sample can be extracted after only two centrifugations.
Tipo: Info:eu-repo/semantics/article
Ano: 1974
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3492

On the identity and nomenclature of &lt;i&gt;Paracanthonchus caecus&lt;/i&gt; (Bastian, 1865), with a redefinition of the genus &lt;i&gt;Paracanthonchus Micoletzky&lt;/i&gt; (Nematoda, Cyatholaimidae)
Provedor de dados: 27
Autores: Vincx, M.; Sharma, J.; Smol, N.
A historical review of the systematics of &lt;em&gt;Paracanthonchus caecus&lt;/em&gt; (Bastian, 1865) and a comparison of specimens from different localities show that this “species” in fact comprises four distinct species. &lt;em&gt;Paracanthonchus caecus&lt;/em&gt; Micoletzky, 1924 nec &lt;em&gt;P. caecus&lt;/em&gt; (Bastian, 1865) is designated as the valid type species of the genus &lt;em&gt;Paracanthonchus. P. heterodontus&lt;/em&gt; (Schulz, 1932) and &lt;em&gt;P. thaumasius&lt;/em&gt; (Schulz, 1932) are re-established. &lt;em&gt;P. caecm&lt;/em&gt; sensu Gerlach 1965 is considered as a distinct species: &lt;em&gt;P. gerlachi&lt;/em&gt; sp.n. &lt;em&gt;P. canadensis&lt;/em&gt; sp.n. is described and is very close to &lt;em&gt;P. caecus&lt;/em&gt;...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Paracanthonchus caecus (Bastian; 1865) Paracanthonchus micoletzkyi.
Ano: 1982
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=7008

Analysis of community attributes of the benthic meiofauna of Frierfjord-Langesundfjord
Provedor de dados: 27
Autores: Heip, C.H.R.; Warwick, R.M.; Carr, M.R.; Herman, P.M.J.; Huys, R.; Smol, N.; Van Holsbeke, K.
Tipo: Info:eu-repo/semantics/article
Ano: 1988
URL: http://www.vliz.be/imisdocs/publications/221038.pdf

Influence of temperature on the reproductive potential of &lt;i&gt;Oncholaimus oxyuris&lt;/i&gt; (Nematoda: Oncholaimidae)
Provedor de dados: 27
Autores: Heip, C.H.R.; Smol, N.; Absillis, V.
The large nematode &lt;i&gt;Oncholaimus oxyuris&lt;/i&gt; Ditlevsen, 1911 is a dominant predator in a shallow polyhaline brackish-water pond in Belgium. The reproductive potential of this species was calculated as the intrinsic rate of natural increase r = 1/&lt;i&gt;G&lt;/i&gt; ln &lt;i&gt;pN&lt;sub&gt;e&lt;/sub&gt;&lt;/i&gt;, in which &lt;i&gt;D&lt;/i&gt; is the generation time, &lt;i&gt;p&lt;/i&gt; is the percentage of females, and &lt;i&gt;N&lt;sub&gt;e&lt;/sub&gt;&lt;/i&gt; is the number of eggs per female. The generation time varies between 570 days at 5°C and 101 days at 25°C and is the main factor in the determination of &lt;i&gt;r&lt;/i&gt;. The relationship between &lt;i&gt;r&lt;/i&gt; and temperature is nearly linear and is given by...
Tipo: Info:eu-repo/semantics/article
Ano: 1978
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3577

The life cycle of &lt;i&gt;Oncholaimus oxyuris&lt;/i&gt; (Nematoda) in its habitat
Provedor de dados: 27
Autores: Smol, N.; Heip, C.H.R.; Govaert, M.
Tipo: Info:eu-repo/semantics/article
Ano: 1980
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=7001