Evaluation of a plasticine-filled leg band for day-old ducklings

Article Abstract:

It is essential that newly-hatched ducklings are marked when carrying out population studies of ducks, but standard leg bands are too large and web tags too inconspicuous. An experiment has been conducted with six duck species on two continents to test and evaluate the use of plasticine bands for marking young wood ducklings. The null theory of no difference in survival rates between ducklings marked with web tags and plasticine leg bands was tested and no evidence was found that those marked with plasticine-filled leg bands had greater mortality rates than ducklings with web tags.

Usage, Waterfowl, Ducks, Animal marking, Animal tagging

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Forestry trees as invasive aliens

Article Abstract:

A number of pine species (Pinus spp.) introduced for forestry have become invasive aliens in the southern hemisphere. The most invasive species have attributes such as low seed mass, a brief juvenile period, and a short time between large seed crops. Protocols should be set up to limit the extent of invasion by alien trees. The invasive potential of commercially significant trees needs to be evaluated on a case-by-case basis for risks, benefits and costs.

Biological invasions, Pine, Pines

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Interactions among frugivores and fleshy fruit trees in a Philippine submontane rainforest

Article Abstract:

Research presented concerns the possible effects of frugivore extinction on fleshy fruit tree populations in one of the few tropical rainforest ecosystems left in the Philippines. Topics addressed include animal species that disperse seeds, specialized tree species that would be drastically effected by frugivore extinction, and trees that may prove useful to regeneration projects.

Philippines, Statistical Data Included, Endangered species, Rain forest ecology, Fruit trees, Frugivores

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