253 resultados para biological maturity

em Plymouth Marine Science Electronic Archive (PlyMSEA)


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This covers the relation of size to sexual maturity in Pleuronectids, the destruction of immature fish in the North Sea and proposed remedial measures.

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The rationale behind the use of analyses of estuarine organisms to assess levels of heavy-metal contamination is described and compared with alternative methods such as the analysis of waters or sediments. Based on field observations in United Kingdom estuaries and on evidence from the literature, an assessment is made of the suitability of 17 species as the indicators of metals and metalloids including Ag, As, Cd, Co, Cr, Cu, Hg, Ni, Se, Sn, Pb and Zn.

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A 64-page catalogue of material in the MBA Archive Collection containing details of documents, records, and personal papers relating to the history and development of the Marine Biological Association.