Media type: E-Article Title: A Twenty-One-Year Study of the Water-Bugs in a Moorland Fishpond Contributor: Macan, T. T. Published: JSTOR, 1976 Published in: The Journal of Animal Ecology, 45 (1976) 3, Seite 913 Language: Not determined DOI: 10.2307/3589 ISSN: 0021-8790 Keywords: Animal Science and Zoology ; Ecology, Evolution, Behavior and Systematics Origination: Footnote: