Graduate Thesis Or Dissertation
 

Biology of the two external Acarapis species of honey bees : Acarapis dorsalis Morgenthaler and Acarapis externus Morgenthaler (Acari: Tarsonemidae)

Público Deposited

Contenido Descargable

Descargar PDF
https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/ht24wn90h

Descriptions

Attribute NameValues
Creator
Abstract
  • The biology of the two external Acarapis mites of honey bees, Acarapis dorsalis Morgenthaler and Acarapis externus Morgenthaler was studied. It was observed that both Acarapis species have similar developmental period (8-9 days) with males emerging earlier than females. Mite load and infestation rate of A. dorsalis decreased as bees become older. A. externus remained high on bees up to 35 days old. This observation may indicate that A. dorsalis prefers younger bees while A. externus seems to maintain its population on older bees. In nucleus colonies deliberately exposed to known populations of both external Acarapis species, infestation by A. dorsalis appears to be more rapid than A. externus. Introduction of 500 A. dorsalis established the highest rate of infestation (17.10%) in a relatively short period of time, i.e., 9-12 weeks. The highest infestations of A. dorsalis were during the spring months (March to June) and in mid-late summer (August and September) with the lowest infestation rates in January and July. For A. externus, mite population was highest in the fall (October and November). The lowest infestation was recorded in July. The average female:male ratios observed were 1.9:1 for A. dorsalis and 2.07:1 for A. externus. No relationship between nectar flow and percent mite infestation was established.
Resource Type
Fecha Disponible
Fecha de Emisión
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Committee Member
Academic Affiliation
Non-Academic Affiliation
Subject
Declaración de derechos
Publisher
Peer Reviewed
Language
Digitization Specifications
  • File scanned at 300 ppi (Monochrome) using Capture Perfect 3.0.82 on a Canon DR-9080C in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
Replaces

Relaciones

Parents:

This work has no parents.

En Collection:

Elementos

Miniatura Título Fecha de subida Visibilidad Acciones
file details IbayLiliaArmendez1990.pdf 2017-08-23 Público Descargar