Consulta: creatorFacets:"Kochevar, Re"
Registros recuperados: 2
Data/hora: 02/06/2024 12:38:10

Revealing pelagic habitat use: the tagging of Pacific pelagics program
Provedor de dados: 5
Autores: Block, Ba; Costa, Dp; Boehlert, Gw; Kochevar, Re.
Tagging of Pacific pelagics (TOPP) is a pilot program of the Census of marine life (CoML) that will lead to understanding of pelagic habitat use by marine vertebrates and large squid in the North Pacific. Taking a multispecies approach, the TOPP project will use a range of electronic tag technologies to put the distribution and behavior of pelagic organisms, in the context of the oceanography of the North Pacific. Tag-bearing animals will be used as autonomous ocean profilers to enhance sparse oceanographic observations for vast ocean regions. These autonomous ocean samplers will provide unprecedented coverage of the water column structure of the North Pacific. The temporal and spatial data generated by this project will provide an "organism-eye" view of...
Tipo: Text
Palavras-chave: Milieu pélagique; Marquage; Organismes pélagiques; Pelagic habitat; Tagging; Pelagic organism.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00322/43308/42966.pdf

Sulfide-Driven Autotrophic Balance in the Bacterial Symbiont-Containing Hydrothermal Vent Tubeworm, Riftia pachyptila Jones
Provedor de dados: 5
Autores: Childress, Jj; Fisher, Cr; Favuzzi, Ja; Kochevar, Re; Sanders, Nk; Alayse, Anne-marie.
Hydrothermal vent tubeworms, Riftia pachyptila Jones, were maintained alive and studied on board ship using flow-through pressure aquaria. Simultaneous measurements of O2, SIGMA-CO2, SIGMA-H2S fluxes showed that the intact symbioses reach maximum rates of uptake of SIGMA-CO2 (&gt;2 mu-mole g-1 h-1) at about 90 mu-M SIGMA-H2S. Measurements were made of hemolymph and coelomic fluid SIGMA-CO2, SIGMA-H2S, thiosulfate, pH, and hemoglobin concentrations in worms kept under various conditions of O2 and SIGMA-H2S. Normal hemolymph pH appears to be about 7.5 and is not affected by SIGMA-H2S and SIGMA-CO2 concentrations within the ranges observed. We conclude that Riftia is specialized to provide sulfide to its symbionts with minimal interaction of sulfide with the...
Tipo: Text
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00178/28970/27392.pdf