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grasgroei | 23 July 2018 | |
| Iedere week meet Marlon de lengte van de blaadjes aan gemarkeerde grassprietjes. Daarmee stellen we vast hoeveel voedsel er is voor de ganzen. Vandaag helpt Armin haar door te notuleren. Dit jaar is er relatief lang gras in het dorp. De ganzen komen hier nauwelijks eten, maar blijven bij het meer en eten mos. Volwassen ganzen kunnen de rui doorkomen op een mosdieet, omdat ze wat van hun lichaamsreserves gebruiken voor de groei van hun slagpennen. Als er jongen waren, dan lag dit anders. De jongen moeten het eiwitrijke gras eten omdat ze veel moeten groeien. Die zouden steeds in het dorp komen om dit gras te oogsten, ver weg van water waar ze veilig zouden zijn voor de poolvossen. Maar dit jaar is door het gebrek aan kuikens, het gras in het dorp behoorlijk lang. | ||
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