Portal de Periódicos da CAPES

Movements of adult aquatic insects along a Montana (USA) springbrook

1988; Taylor & Francis; Volume: 10; Issue: 2 Linguagem: Inglês

10.1080/01650428809361317

1744-4152

Thomas S. Jones, Vincent H. Resh,

Fish Ecology and Management Studies

The occurrence and movement patterns of adult insects along a forested springbrook near Flathead Lake, Montana, USA, were studied during three 15‐day periods from 19 June through 9 August 1985, using a two‐sided Malaise trap. Of the Plecoptera, numbers of males and gravid females ofMalenka flexura gravid females of Zapadafrigida and total numbers of Paraperla wilsoni were significantly higher for downstream‐flying adults during one to three periods. Of the Trichoptera, numbers of males of Anagepetus debilis were significantly higher for upstream‐flying adults during one period, and males of Lepidostoma cascadense and gravid females of L. spicata were significantly higher for downstream‐flying adults during another period. In none of the 26 species examined in these three orders did females show a statistically significant pattern of upstream flight.