Search USGS⌕ Search

Geology topics

J.L. Sincock

Publications and source records attributed to J.L. Sincock.

14 recordsLinked to original sources
USGS1987

Attraction of Hawaiian seabirds to lights: conservation efforts and effects of moon phase

Increased urban lighting on Kauai Island, Hawaii, has resulted in new problems for threatened and endangered procellariiform birds. Between 1978 and 1985,11,767 Kewell's shearwaters, 38 dark-rumped petrels, and 8 band-rumped storm petrels were attracted to bright urban lights, struck unseen objects, and fell to the ground. A salvage effort involving public cooperation and government-run 'aid stations' has returned 90% of these birds to the wild. Nightly fallout of seabirds was significantly reduced during the full moon, but fallout increased as the new moon approached. The heaviest fallout occurred in urban coastal areas, particularly at river mouths. More than 97% of the fallout involved fledgling birds apparently leaving their mountain nesting grounds for the first time. Less than 1%of these birds were recovered again on subsequent nights.

Wildlife Society Bulletin↗
USGS1985

Light attraction in endangered procellariiform birds: Reduction by shielding upward radiation

Autumnal attraction to man-made lighting causes heavy mortality in fledgling Hawaiian seabirds: Newell's Shearwater ( Puffinus auricularis newelli ), Dark-rumped Petrel ( Pterodroma phaeopygia sandwichensis ), and Band-rumped Storm-Petrel ( Oceanodroma castro ). These threatened, endangered, and rare species (respectively) approach and circle lights on their first flight from mountain nesting colonies on the island of Kauai to the sea. We shielded lights of the largest resort to prevent upward radiation on alternate nights during two fledgling seasons. Shielding decreased attraction by nearly 40%. Most attraction occurred 1-4 h after sunset. Full moon dramatically decreased attraction, a phenomenon that has both theoretical and management implications.

The Auk↗
USGS1964

Ducks in Dixie

Explore the source record for details and available documents.

Book chapter↗
USGS1963

A survey of fungi associated with lesioned and chlorotic sago pondweed (Potamogeton pectinatus)

Isolations from 1000 Potamogeton pectinatus plants collected from six major stands in Back Bay, Virginia and 13 in Currituck Sound, North Carolina yielded Pythium spp. consistently and in relatively high frequency. Although specific determination of these isolates was unsuccessful, they were separated into three groups according to morphological and cultural characteristics. Rhizoctonia solani Kuehn was isolated in rare instances. In inoculation studies, isolates of R. solani were pathogenic to P. pectinatus , whereas inoculations with Pythium spp. proved inconclusive, even though one group of isolates exhibited pathogenic tendencies.

Plant Disease Reporter↗