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Early nutrition and development of t...

Donnell, David Michael.

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Early nutrition and development of the congeneric parasitoids, Encarsia formosa and Encarsia pergandiella (Hymenoptera: Aphelinidae).

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Early nutrition and development of the congeneric parasitoids, Encarsia formosa and Encarsia pergandiella (Hymenoptera: Aphelinidae)./
Author:	Donnell, David Michael.
Description:	110 p.
Notes:	Director: Martha S. Hunter.
Contained By:	Dissertation Abstracts International63-08B.
Subject:	Biology, Entomology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3061009
ISBN:	0493767185

Early nutrition and development of the congeneric parasitoids, Encarsia formosa and Encarsia pergandiella (Hymenoptera: Aphelinidae).
Donnell, David Michael.

Early nutrition and development of the congeneric parasitoids, Encarsia formosa and Encarsia pergandiella (Hymenoptera: Aphelinidae). - 110 p.

Director: Martha S. Hunter.

Thesis (Ph.D.)--The University of Arizona, 2002.

The congeneric wasps, <italic>Encarsia formosa</italic> and <italic> E. pergandiella</italic> (Hymenoptera: Aphelinidae) are solitary endoparasitoids with an overlapping host range. Despite their similarities these wasps produce eggs that differ markedly in size. This dissertation details research conducted to determine differences in the egg provisioning strategies of these two wasp species and to understand how these differences correlate with differences in their early development.

ISBN: 0493767185Subjects--Topical Terms:

1018619
Biology, Entomology.

Early nutrition and development of the congeneric parasitoids, Encarsia formosa and Encarsia pergandiella (Hymenoptera: Aphelinidae).
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020 $a 0493767185
035 $a (UnM)AAI3061009
035 $a AAI3061009
040 $a UnM $c UnM
100 1 $a Donnell, David Michael. $3 1259194
245 1 0 $a Early nutrition and development of the congeneric parasitoids, Encarsia formosa and Encarsia pergandiella (Hymenoptera: Aphelinidae).
300 $a 110 p.
500 $a Director: Martha S. Hunter.
500 $a Source: Dissertation Abstracts International, Volume: 63-08, Section: B, page: 3561.
502 $a Thesis (Ph.D.)--The University of Arizona, 2002.
520 $a The congeneric wasps, <italic>Encarsia formosa</italic> and <italic> E. pergandiella</italic> (Hymenoptera: Aphelinidae) are solitary endoparasitoids with an overlapping host range. Despite their similarities these wasps produce eggs that differ markedly in size. This dissertation details research conducted to determine differences in the egg provisioning strategies of these two wasp species and to understand how these differences correlate with differences in their early development.
520 $a The use of the yolk protein, vitellogenin, was examined in the two wasps. A vitellogenin gene was isolated from <italic>E. formosa</italic> and the mature gene product observed in ovary extracts. Evidence for the use of vitellogenin was not found in an analysis of ovary extracts from <italic>E. pergandiella </italic> and a gene for vitellogenin was not detected in the genome of this wasp.
520 $a Embryonic development times for the two parasitoids were studied in hosts of different ages. The embryonic development time of <italic>E. formosa</italic> is significantly shorter than that of <italic>E. pergandiella</italic> regardless of the host stage parasitized. This suggests that the rate of embryonic development of <italic>E. pergandiella</italic> is much more closely linked to that of the host than the development rate of <italic>E. formosa</italic>.
520 $a The quantity and composition of amino acids in the eggs of the two wasps was followed over the course of embryonic development. The quantity of amino acid in the eggs of <italic>E. formosa</italic> does not increase during embryonic development while the eggs of <italic>E. pergandiella</italic> absorb more than 30 times the quantity of amino acids from the host hemolymph during embryonic development than is present in the eggs at the time oviposition. Only <italic> E. pergandiella</italic> appeared capable of absorbing and utilizing [<super> 14</super>C]-labeled lysine in an <italic>in vitro</italic> system.
520 $a The capacity of <italic>E. pergandiella</italic> eggs to absorb host nutrients is correlated with the development of a multinucleate extraembryonic membrane that grows to completely encompass the embryo at a very early stage of development. Evidence was found for pinocytosis of material by the embryo from the space bounded by the extraembryonic membrane. A similarly developed extraembryonic membrane was not observed in the eggs of <italic>E. formosa </italic>.
590 $a School code: 0009.
650 4 $a Biology, Entomology. $3 1018619
690 $a 0353
710 2 0 $a The University of Arizona. $3 1017508
773 0 $t Dissertation Abstracts International $g 63-08B.
790 $a 0009
790 1 0 $a Hunter, Martha S., $e advisor
791 $a Ph.D.
792 $a 2002
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3061009