Sexually dimorphic effect of mating on the melanotic encapsulation response in the harem-defending Wellington tree weta,Hemideina crassidens(Orthoptera: Tettigonioidea: Anostostomatidae)

Ethology ◽  
2017 ◽  
Vol 123 (11) ◽  
pp. 785-792 ◽  
Author(s):  
Clint D. Kelly
Keyword(s):  
Sexually Dimorphic ◽  
Hemideina Crassidens ◽  
Tree Weta ◽  
Melanotic Encapsulation

Sex differences in melanotic encapsulation responses (immunocompetence) in the damselfly Lestes forcipatus Rambur

2002 ◽  
Vol 80 (9) ◽  
pp. 1578-1583 ◽  
Author(s):  
Christopher P Yourth ◽  
Mark R Forbes ◽  
Robert L Baker
Keyword(s):  
Sex Differences ◽  
Immune Responses ◽  
Life Histories ◽  
Mass Gain ◽  
Sexually Dimorphic ◽  
Foreign Objects ◽  
Males And Females ◽  
And Gender ◽  
Parasitic Mites ◽  
Melanotic Encapsulation

A few studies have shown that male and female invertebrates differ in immunity and that these differences appear related to differences in sexual dimorphism and gender differences in life histories. Melanotic encapsulation of foreign objects in insects is one form of immunity. The damselfly Lestes forcipatus Rambur is moderately sexually dimorphic, and much is known about patterns of mass gain in congeners relating to differences in life history between males and females. In this study, females were more immunoresponsive than males under controlled temperatures, following emergence, and at a time when parasitic mites were challenging these hosts. However, males and females that overlapped in mass at emergence did not differ in their immune responses. Males in better condition at emergence were more immunoresponsive than lighter males, but this relation was not found in females. Sex differences in immune expression may have implications for how females versus males are able to deal with challenges from parasites, under varying environmental conditions.

scholarly journals Ecology and Development in an Island Population of Wellington Tree Weta (Hemideina crassidens).

2021 ◽  
Author(s):  
◽  
Alexander Dixson
Keyword(s):  
Nutritional Ecology ◽  
Adult Longevity ◽  
Seasonal Patterns ◽  
Island Population ◽  
Factors Affecting ◽  
Treatment Groups ◽  
The Past ◽  
Male Tree ◽  
Hemideina Crassidens ◽  
Tree Weta

<p>Sexual selection and the mating system of the Wellington tree weta has been extensively studied during the last 15 years. In the past 10 years, nutritional ecology and factors affecting the distribution of species in the genus Hemideina have also been examined in great detail. This recent work and the extensive studies of New Zealand tree weta species that preceded it provide much context and comparison for this thesis, which examines the ecology of a population of tree weta living on Matiu/Somes Island. Less is known about factors affecting the development of the exaggerated male weaponry that is characteristic of much of the genus Hemideina.   This thesis firstly presents a mark-recapture study conducted over 42 months on Matiu/Somes Island to obtain ecological information about the population. Secondly, this thesis presents an experiment on the effects of protein supplement on growth and weaponry in male Wellington tree weta derived from the Matiu/Somes Island population. The results of the field study indicate that male tree weta live longer than females on Matiu/Somes Island and weapon size is positively related to adult longevity of males. Seasonal patterns shown in the population on Matiu/Somes Island and inferences about aspects of their life cycle are discussed. Female tree weta on Matiu/Somes Island formed harems throughout each year and there was a positive relationship between males weapon size and the number of females in a harem. Results do not indicate seasonal differences in harem-forming behaviours of females. The results of the captive rearing study include a shorter development time and larger weaponry as adults in males raised on a protein supplemented diet, compared to individuals raised on an entirely herbivorous diet. Details of differences in the course of development are also discussed for the two diet treatment groups.</p>

Ecology and Development in an Island Population of Wellington Tree Weta (Hemideina crassidens).

2021 ◽  
Author(s):  
◽  
Alexander Dixson
Keyword(s):  
Nutritional Ecology ◽  
Adult Longevity ◽  
Seasonal Patterns ◽  
Island Population ◽  
Factors Affecting ◽  
Treatment Groups ◽  
The Past ◽  
Male Tree ◽  
Hemideina Crassidens ◽  
Tree Weta

<p>Sexual selection and the mating system of the Wellington tree weta has been extensively studied during the last 15 years. In the past 10 years, nutritional ecology and factors affecting the distribution of species in the genus Hemideina have also been examined in great detail. This recent work and the extensive studies of New Zealand tree weta species that preceded it provide much context and comparison for this thesis, which examines the ecology of a population of tree weta living on Matiu/Somes Island. Less is known about factors affecting the development of the exaggerated male weaponry that is characteristic of much of the genus Hemideina.   This thesis firstly presents a mark-recapture study conducted over 42 months on Matiu/Somes Island to obtain ecological information about the population. Secondly, this thesis presents an experiment on the effects of protein supplement on growth and weaponry in male Wellington tree weta derived from the Matiu/Somes Island population. The results of the field study indicate that male tree weta live longer than females on Matiu/Somes Island and weapon size is positively related to adult longevity of males. Seasonal patterns shown in the population on Matiu/Somes Island and inferences about aspects of their life cycle are discussed. Female tree weta on Matiu/Somes Island formed harems throughout each year and there was a positive relationship between males weapon size and the number of females in a harem. Results do not indicate seasonal differences in harem-forming behaviours of females. The results of the captive rearing study include a shorter development time and larger weaponry as adults in males raised on a protein supplemented diet, compared to individuals raised on an entirely herbivorous diet. Details of differences in the course of development are also discussed for the two diet treatment groups.</p>

Isolation ofListeria monocytogenesfrom a bite in a cat from the common tree weta (Hemideina crassidens)

1984 ◽  
Vol 32 (5) ◽  
pp. 79-80 ◽  
Author(s):  
B.R. Jones ◽  
L.C. Cullinane ◽  
P.R. Cary
Keyword(s):  
The Common ◽  
Hemideina Crassidens ◽  
Tree Weta ◽  
Common Tree

Successful use of radiotransmitters in tracking male tree wētā Hemideina crassidens (Orthoptera: Tettigonioidea: Anostostomatidae)

2018 ◽  
Vol 41 (1) ◽  
pp. 25-28 ◽  
Author(s):  
Darryl T. Gwynne ◽  
Clint D. Kelly
Keyword(s):  
Male Tree ◽  
Hemideina Crassidens ◽  
Tree Weta

scholarly journals Allometry and sexual selection of male weaponry in Wellington tree weta, Hemideina crassidens

2004 ◽  
Vol 16 (1) ◽  
pp. 145-152 ◽  
Author(s):  
Clint D. Kelly
Keyword(s):  
Sexual Selection ◽  
Hemideina Crassidens ◽  
Tree Weta ◽  
Selection Of

Elevational variation in adult body size and growth rate but not in metabolic rate in the tree weta Hemideina crassidens

2015 ◽  
Vol 75 ◽  
pp. 30-38 ◽  
Author(s):  
Mariana Bulgarella ◽  
Steven A. Trewick ◽  
A. Jonathan R. Godfrey ◽  
Brent J. Sinclair ◽  
Mary Morgan-Richards
Keyword(s):  
Growth Rate ◽  
Body Size ◽  
Metabolic Rate ◽  
Adult Body Size ◽  
Adult Body ◽  
Hemideina Crassidens ◽  
Elevational Variation ◽  
Tree Weta
Sign in / Sign up

Export Citation Format

Share Document