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An introduction to a sample time-series of abyssal macrobenthos - methods and principle sources of variability ArchiMer
Gage, Jd; Lightfoot, Rh; Pearson, M; Tyler, Pa.
Tipo: Text
Ano: 1980 URL: http://archimer.ifremer.fr/doc/00121/23260/21090.pdf
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Growth and reproduction of the deep-sea brittlestar ophiomusium-lymani-wyville-thomson ArchiMer
Gage, Jd; Tyler, Pa.
Tipo: Text
Ano: 1982 URL: http://archimer.ifremer.fr/doc/00121/23192/21037.pdf
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Reproduction and growth of the deep-sea brittlestar ophiura-ljungmani (lyman) ArchiMer
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
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