Consulta: creatorFacets:"Tyler, Pa"
Registros recuperados: 7
Data/hora: 11/06/2024 12:33:14

Reproductive biology, sexual dimorphism, and population structure of the deep sea hydrothermal vent scale-worm, Branchiplynoee seepensis (Polychaeta : Polynoidae)
Provedor de dados: 5
Autores: Jollivet, D; Empis, A; Baker, Mc; Hourdez, S; Comtet, Thierry; Jouin-toulmond, C; Desbruyeres, Daniel; Tyler, Pa.
The polychaete family Polynoidae (scale-worms) is well-represented at deep sea hydrothermal vents. Most species are free-living in a wide range of habitats: from high-temperature hydrothermal `chimney' walls to diffuse venting areas. Conversely, species of the genus Branchipolynoe live inside the mantle cavity of vent and seep mytilids. Specimens, morphologically close to Branchipolynoe seepensis, have been reported from all the known vent areas on the Mid-Atlantic Ridge (MAR), with varying infestation rates (0¿6 individuals per host). Reproductive tract, gametogenesis and population structures were examined for specimens from the Lucky Strike vent field (MAR) in order to test whether this species displays dwarf males, protandric hermaphroditism or...
Tipo: Text
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/publication-615.pdf

Reproduction and growth of the deep-sea brittlestar ophiura-ljungmani (lyman)
Provedor de dados: 5
Autores: Tyler, Pa; Gage, Jd.
Reproductive biology and population dynamics of Ophiura Ijungmani were studied by measuring disk diameters and by examining oocyte size-frequencies and fecundity from a sequential seasonal series of large samples from a 2900 m deep Permanent Station in the Rockall Trough (Northeast Atlantic). Egg size (max. 90 !lm) and fecundity (up to 57000 eggs per individual) suggests indirect planktotrophic development, while a clear annual cycle in gametogenesis, with probably synchronous spawning in JanuaryFebruary, confirms a marked seasonality that is also seen as an annual, summertime set of postlarvae on to the bottom. Analysis of size structure of the population indicates annually discrete year classes with a maximum longevitv of around 10 years. lndividuals...
Tipo: Text
Palavras-chave: Ovocytes; Fécondité; Structure de la répartition des classes de tailles; Recrutement; Capacité de survie; Oocytes; Fecundity; Population structure; Recruitment; Survivorship.
Ano: 1980
URL: http://archimer.ifremer.fr/doc/00323/43424/43087.pdf

Megafauna from sublittoral to abyssal depths along the Mid-Atlantic Ridge south of Iceland
Provedor de dados: 5
Autores: Copley, Jtp; Tyler, Pa; Sheader, M; Murton, Bj; German, Cr.
101 species were identified from 102 biological samples obtained between 225 and 2600 m depth on the Reykjanes Ridge, extending the biogeographic records for several species. Multivariate analysis of between-sample species similarity reveals a two-zone bathymetric faunal distribution with the transition at 800-1000 m. A hydrographic survey of the ridge axis suggests that this faunal zonation is influenced by the water mass structure. Despite the limitations of a sampling programme not designed a priori for biological sampling, the recovery and preservation of the samples and the insight that they provide serves to reinforce that every effort should be made to capitalise on the opportunities for obtaining samples afforded by non-biological sampling...
Tipo: Text
Palavras-chave: Mid-ocean ridge; Megafauna; Reykjanes Ridge; Bathymetric zonation; Water mass structure.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00096/20725/18362.pdf

Submersible observations of the invertebrate fauna on the continental-slope southwest of ireland (ne atlantic-ocean)
Provedor de dados: 5
Autores: Tyler, Pa; Zibrowius, H.
Relatively little is known of the fauna found on rock substrates in the deep ocean. As a result of the Franco-British deep diving cruise Cyaporc in 1986 using the submersible Cyana we present observations of a highly diverse sponge, cnidarian and echinoderm fauna occurring between 1 800 and 3 000 m on the steep slopes to the west of the Porcupine Bank and Goban Spur. This fauna is dominated. by suspension feeders and appears to show a vertical zonation corresponding to water mass structure. The highest biomass and variety of echinoderms are found between 2 100 and 2 600 m bathed in northward flowing North East Atlantic Deep Water. We present also additional observations of species known from previous sampling programmes but rarely photographed in their...
Tipo: Text
Palavras-chave: BATHYAL HARD GROUND FAUNA; DEPTH ZONATION; SUSPENSION FEEDERS; ANTHOZOA; ECHINODERMATA.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/00100/21154/18773.pdf

An introduction to a sample time-series of abyssal macrobenthos - methods and principle sources of variability
Provedor de dados: 5
Autores: Gage, Jd; Lightfoot, Rh; Pearson, M; Tyler, Pa.
Tipo: Text
Ano: 1980
URL: http://archimer.ifremer.fr/doc/00121/23260/21090.pdf

Understanding the biogeography of chemosynthetic ecosystems
Provedor de dados: 5
Autores: Tyler, Pa; German, Cr; Ramirez-llodra, E; Van Dover, Cl.
ChEss is a recently-funded Census of marine life programme aimed at improving our knowledge of the biogeography of deepwater chemosynthetically driven ecosystems by promoting an international field phase of discovery and exploration. The main objectives are to assess and explain the diversity, distribution and abundance of hydrothermal vent and cold seep species. With the global mid-ocean ridge system extending similar to65000 km, it is unlikely that its entire length would be examined in detail. The ChEss programme proposes to select a limited number of target areas chosen for the discovery of new vents and seeps. The intention is to identify the maximum scientific return that could be achieved from detailed investigation of the minimum number of sites at...
Tipo: Text
Palavras-chave: Biogéographie; Écosystème chémosynthétique; Évent hydrothermal; Suintement froid; Biogeography; Chemosynthetic ecosystems; Hydrothermal vent; Cold seep.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00322/43306/43042.pdf

Growth and reproduction of the deep-sea brittlestar ophiomusium-lymani-wyville-thomson
Provedor de dados: 5
Autores: Gage, Jd; Tyler, Pa.
Tipo: Text
Ano: 1982
URL: http://archimer.ifremer.fr/doc/00121/23192/21037.pdf