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Bioaccumulation of persistent organic pollutants in female common dolphins (Delphinus delphis) and harbour porpoises (Phocoena phocoena) from western European seas: Geographical trends, causal factors and effects on reproduction and mortality 5
Pierce, G; Santos, M; Murphy, S; Learmonth, J; Zuur, A; Rogan, E; Bustamante, Paco; Caurant, Florence; Lahaye, V; Ridoux, Vincent; Zegers, B; Mets, A; Addink, M; Smeenk, C; Jauniaux, T; Law, R; Dabin, W; Lopez, A; Farre, J; Gonzalez, A; Guerra, A; Garcia Hartmann, M; Reid, R; Moffat, C; Lockyer, C; Boon, J.
Concentrations of polychlorinated biphenyls (PCBs) in blubber of female common dolphins and harbour porpoises from the Atlantic coast of Europe were frequently above the threshold at which effects on reproduction could be expected, in 40% and 47% of cases respectively. This rose to 74% for porpoises from the Southern North Sea. PCB concentrations were also high in southern North Sea fish. The average pregnancy rate recorded in porpoises (42%) in the study area was lower than in the western Atlantic but that in common dolphins (25%) was similar to that of the western Atlantic population. Porpoises that died from disease or parasitic infection had higher concentrations of persistent organic pollutants (POPs) than animals dying from other causes. Few of the...
Tipo: Text Palavras-chave: Diet; Reproduction; Persistent organic pollutants; Delphinus delphis; Phocoena phocoena.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-7314.pdf
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Female description of the hydrothermal vent cephalopod Vulcanoctopus hydrothermalis 5
Gonzalez, A; Guerra, A; Pascual, S; Segonzac, Michel.
During biological sampling of hydrothermal vents on the East Pacific Rise, the manned submersible 'Nautile' caught the first female of the endemic cephalopod Vulcanoctopus hydrothermalis. The specimen caught at the vent site Gromit (21 degrees 33 66'S, 114 degrees 17 98'W at 2832 m depth) is described here in detail and an amended diagnosis of the species proposed. The external morphology, measurements and internal structure resemble that Of males of this species. One of the most remarkable characters is the lack of spermathecae and the absence of apical filaments in the oocytes to provide a site for sperm storage. It is suggested that some species of the genera Benthoctopus and Bathypolypus would be the most suitable octopod ancestor of V. hydrothermalis.
Tipo: Text Palavras-chave: Female description; Vulcanoctopus hydrothermalis; Cephalopods; Hydrothermal vent.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-4044.pdf
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La culture suspendue de Chlamys varia , de la nourricerie a la taille commerciale, en Galice (Espagne) 5
Cancelo, M; Guerra, A; Fernandez, A; Gabin, C; Fernandez, J.
Chlamys varia has a great potential of culture in Galicia, and it is likely to be among the pectinids, both a complement and an alternative to raft mussel culture which is dominant in the region. The present work attempts to analyse the growth of nursery spat of 6.46 plus or minus 0.75 mm reared in a raft during fifteen months in different depth and densities. The final average height is between 36.49 plus or minus 0.56 mm in the group of high density in the bottom and 40.75 plus or minus 0.55 mm in those of low density at the surface. Different culture densities have shown significant differences in growth (p < 0.001). However, different depths have not shown such differences. At the end of this period mortality is lower than 2% in all groups.
Tipo: Text Palavras-chave: ANE; Spain; Galicia Chlamys varia Bivalvia Spat Mortality Growth Raft culture Nursery ponds.
Ano: 1992 URL: http://archimer.ifremer.fr/doc/1992/acte-923.pdf
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