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Registros recuperados: 88 | |
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Stienen, E.W.M.; Brenninkmeijer, A.. |
During the 20th century the numbers of nesting Sandwich Terns <i>Sterna sandvicensis</i> in The Netherlands have fluctuated heavily. After the collapse in the 19605 the number of breeding pairs increased only slowly and stabilised at a low level. Earlier studies showed that population trends may be related to changes in food availability. Since the Sandwich Tern is a highly specialised piscivorous seabird, which feeds almost exclusively on tour species of fish (herring, sprat, sandeel and greater sandeel), the Sandwich Tern is probably highly vulnerable to changes in the availability of its prey species. To determine the key factors influencing population size the Institute for Forestry and Nature research (IBN-DLO), in co-operation with the... |
Tipo: Info:eu-repo/semantics/book |
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Ano: 1998 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=662 |
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Bouillon, J.; Massin, C.; Kresevic, R.. |
Non siphonophoran hydrozoans from the collections of the RBINS, including 769 species, are presented according to the most current use in the actual literature. These collections house type material of 66 nominal species and varieties. For each species, and whenever possible, the locality, the reference number in the collection, the number of specimens, of colonies and of microscopic slides, the mode of preservation (alcohol, formalin, dry) and the date of collecting are given. |
Tipo: Info:eu-repo/semantics/book |
Palavras-chave: Taxonomy; Hydroidomedusae. |
Ano: 1995 |
URL: http://www.vliz.be/imisdocs/publications/276389.pdf |
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Bergmans, A.; Coenen, M.; Konings, P.; Loots, I.; Meire, P.; Schneiders, A.; Sys, M.; Van Bockstal, P.; Van der Welle, J.; Verheyen, R.F.. |
Tipo: Info:eu-repo/semantics/book |
Palavras-chave: Methodology Water management Water policy Belgium; Flanders. |
Ano: 1999 |
URL: http://www.vliz.be/imisdocs/publications/259953.pdf |
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Registros recuperados: 88 | |
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