1,969 research outputs found
Letter from H. L. Russell to Carl Hayden
No full textLetter from H. L. Russell to Carl Hayden regarding fines in the park
Lateralized courtship in a parasitic wasp
No full textLateralization (i.e. left-right asymmetries in the brain and behaviour) of courtship
displays has been examined in a growing number vertebrate species, while
evidence for invertebrates is limited. In this study, we investigated lateralization
of courtship and mating displays in the parasitic wasp Leptomastidea abnormis.
Results showed a population-level lateralization of male courtship displays.
Male antennal tapping on the female’s head was right-biased. However, rightbiased
male courtship acts were not characterized by higher male antennal
tapping frequencies, nor success in mating although antennal tapping
frequency was higher in males with mating success with respect to
unsuccessful males. Overall, our results add basic knowledge to the
behavioural ecology of insect parasitoids. To the best of our knowledge, this is
the first report of behavioural lateralization in parasitic Hymenoptera
Population-level lateralized aggressive and courtship displays make better fighters not lovers: evidence from a fly
No full textAssociative learning for danger avoidance nullifies innate positive chemotaxis to host olfactory stimuli in a parasitic wasp
No full text
Watson-Russell Children - 02
No full textPhotograph - Five of the six children of Thomas Watson and Cassie Russell, Athabasca, Alberta. Left to right: William S. Watson, T. Russell Watson, Cecilia B. Watson, H. Bertram Watson, and Helen E. Watso
Watson-Russell Children
No full textPhotograph - Five of the six children of Thomas Watson and Cassie Russell, Athabasca, Alberta. Left to right: William S. Watson, T. Russell Watson, Cecilia B. Watson, Helen E. Watson, and H. Bertram Watso
Early adult learning affects host preferences in the tephritid parasitoid Psyttalia concolor (Hymenoptera: Braconidae)
No full textParasitic wasps rely on a hierarchy of stimuli to
locate their hosts. Olfactory cues from the natal host complex
affect parasitoid preferences and can be learned by
parasitoids during larval stages and the early adult stage.
While the existence of pre-imaginal conditioning has been
documented in several braconid aphid parasitoids, no evidence
has yet been provided for parasitic wasps attacking
Tephritidae. Psyttalia concolor (Hymenoptera: Braconidae)
is a koinobiont larval–pupal endoparasitoid of tephritid flies.
In this study, we evaluated the influence of larval and early
adult experience on subsequent host seeking in P. concolor
females. Parasitoids were reared using Ceratitis capitata or
Bactrocera oleae larvae as hosts, and emerging wasp adults
were tested for host preferences in two-choice bioassays. P.
concolor females preferred to oviposit in, and had higher
oviposition success rates on the natal host. When P. concolor
females were excised from their host puparia, preventing
them from chewing emergence holes, they lost their
natal host preference, solidifying the evidence of early adult
learning for host selection. This study adds to the growing
body of basic knowledge on braconid host-location behavior.
From an applied point of view, training procedures for
early adult learning has potential for use in mass rearing of
parasitoids employed in biological control programs against
tephritid flies
Lek dynamics and cues evoking mating behavior in tephritid flies infesting soft fruits: implications for behavior-based control tools
No full textRussell–Silver syndrome presenting as early asymmetric IUGR
No full textWe report a case of severe intrauterine growth restriction (IUGR) which was diagnosed as Russell–Silver syndrome (RSS) postnatally. RSS (also known as Silver–Russell syndrome) is one of more than 300 recognised forms of genetic disorder that leads to short stature. Uniparental disomy for chromosome 7 (UPD7), i.e. inheriting two copies of chromosome 7 from the mother, and a change in methylation pattern (biochemical silencing of gene expression) of chromosome 11 are the most frequently associated chromosomal defects. A wide spectrum of appearances and symptoms are associated with the condition. Most characteristics are not easily identifiable with prenatal diagnostic ultrasound. The symptom most likely to be detected sonographically is IUGR. This case seeks to raise awareness of RSS, and encourages clinicians to consider uncommon genetic disorders such as RSS as a possible cause of early asymmetric IUGR. ABSTRACT FROM AUTHOR]; Copyright of Ultrasound is the property of Royal Society of Medicine Press Limited and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)32572957Source type: Electronic(1
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