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Full-Text Articles in Life Sciences
Efficacy Of Aerial Broadcast Baiting In Reducing, Larry Clark
Efficacy Of Aerial Broadcast Baiting In Reducing, Larry Clark
Larry Clark
The brown treesnake (Boiga irregularis) is an invasive predator that was introduced on Guam as a stowaway in cargo after World War II. Since then, the population has exploded, attaining 50 to 100 snakes per ha in some areas. The snake has caused the extirpation of ten of the 12 native forest bird species on Guam. The U.S. Department of Agriculture, Wildlife Services, has a program to deter the spread of snakes from Guam to other islands. Hand capture from fences, trapping, toxic bait stations, and canine inspection of outbound cargo methods are used in the control program in various …
Efficacy, Effort, And Cost Comparisons Of Trapping, Larry Clark
Efficacy, Effort, And Cost Comparisons Of Trapping, Larry Clark
Larry Clark
Brown treesnakes (Boiga irregularis) are an invasive species to the island of Guam. Because they have extirpated the native forest avifauna on Guam and are a threat to other Pacifi c islands, the development of effi cient and cost-effective methods to control them is desired. We compared the effi cacy, cost, and effort required to remove brown treesnakes on 6-ha plots in forest scrub on Guam, using 2 methods: trapping and poison baiting. Toxic baits consisted of dead neonatal mice adulterated with 80-mg acetaminophen. To assess effi cacy, we used mark-recapture methods to estimate snake abundance on plots 12 days …
Competition For Aphid Prey Between Different Lady Beetle Species In A Laboratory Arena, Christy Leppanen, Andrei Alyokhin, Serena Gross
Competition For Aphid Prey Between Different Lady Beetle Species In A Laboratory Arena, Christy Leppanen, Andrei Alyokhin, Serena Gross
Andrei Alyokhin
Direct competition for aphid prey (Hemiptera: Aphididae) was evaluated between and among several lady beetle species (Coleoptera: Coccinellidae). The behavior of three native (Coccinella trifasciata, Coleomegilla maculata, and Hippodamia convergens) and four nonnative (Coccinella septempunctata, Harmonia axyridis, Hippodamia variegata, and Propylea quatuordecimpunctata) lady beetles was observed in laboratory arenas. The beetles were kept alone, paired with conspecifics or paired with heterospecifics, and presented with potato aphids (Macrosiphum euphorbiae). Harmonia axyridis was the most successful aphid predator in our study, being able to find aphids more quickly and consume more of them compared to most other lady beetle species. It was …