scholarly journals Ovarian Development State and Oviposition of Adult Females of Piezodorus hybneri (Heteroptera: Pentatomidae) Collected in Soybean Field.

1993 ◽  
Vol 37 (1) ◽  
pp. 5-9 ◽  
Author(s):  
Hiroya HIGUCHI ◽  
Nobuo MIZUTANI
Keyword(s):  
Ovarian Development ◽  
Soybean Field ◽  
Adult Females ◽  
Heteroptera Pentatomidae ◽  
Development State

scholarly journals Dynamics of ovarian maturation during the reproductive cycle of Metynnis maculatus, a reservoir invasive fish species (Teleostei: Characiformes)

2013 ◽  
Vol 11 (4) ◽  
pp. 821-830 ◽  
Author(s):  
Thiago Scremin Boscolo Pereira ◽  
Renata Guimarães Moreira ◽  
Sergio Ricardo Batlouni
Keyword(s):  
Reproductive Cycle ◽  
Ovarian Development ◽  
Gonadosomatic Index ◽  
Ovarian Maturation ◽  
Invasive Fish ◽  
Multiple Spawning ◽  
Adult Females ◽  
The Mean ◽  
Ovulatory Follicles ◽  
Morphometric Evaluation

In this study, we evaluated the dynamics of ovarian maturation and the spawning processes during the reproductive cycle of Metynnis maculatus. Adult females (n = 36) were collected bimonthly between April 2010 and March 2011. The mean gonadosomatic index (GSI) was determined, ovarian and blood samples were submitted for morphometric evaluation and the steroid plasma concentration was determined by ELISA. This species demonstrated asynchronous ovarian development with multiple spawns. This study revealed that, although defined as a multiple spawning species, the ovaries of M. maculatus have a pattern of development with a predominance of vitellogenesis between April and August and have an intensification in spawning in September; in October, a drop in the mean GSI values occurred, and the highest frequencies of post-ovulatory follicles (POFs) were observed. We observed a positive correlation between the POF and the levels of 17α-hydroxyprogesterone. Metynnis maculatus has the potential to be used as a source of pituitary tissue for the preparation of crude extracts for hormonal induction; the theoretical period for use is from September to December, but specific studies to determine the feasibility of this approach must be conducted.

Nesting Biology and Taxonomy of Arpactophilus-Mimi, a New Species of Social Sphecid (Hymenoptera, Sphecidae) From Northern Australia

1988 ◽  
Vol 36 (5) ◽  
pp. 585 ◽  
Author(s):  
RW Matthews ◽  
ID Naumann
Keyword(s):  
National Park ◽  
Ovarian Development ◽  
Brood Care ◽  
Northern Australia ◽  
Nesting Biology ◽  
Selective Pressures ◽  
Nest Sites ◽  
Adult Females ◽  
Single Nest ◽  
A New Species

Arpactophilus mimi, Naumann, sp. nov., is described from Kakadu National Park, N.T. and its biology is outlined. A. mimi nests in abandoned cells of mud-dauber wasps in sandstone overhangs. Its nests are lined heavily with silk and contain 1-15 cells and 1-10 adult wasps (1-7 females, 0-3 males). On average nests contain 5.2 cells and 2.75 adult females. Prey (immature Psyllidae and Tingidae) are supplied progressively. Nests are parasitised by a species of megalyrid wasp, but incidence of parasitism is low. Nest defense is both physical (entrance guard always present) and chemical (citrus odour from heads of both sexes). Females from a single nest could be ranked on the basis of relative ovarian development, suggesting that more than one female oviposits. Females apparently cooperate in brood care and offspring in a nest develop asynchronously. The biology of A. mimi is compared to that of Microstigmus comes Krombein, the most socially advanced sphecid known, and selective pressures that may have acted to promote female cooperation in the two genera are discussed. For A. mimi the lack of available nest sites could be an important factor restricting the ability of offspring to disperse and establish nests.

scholarly journals Herbivory affects ovarian development in the zoophytophagous predator Brontocoris tabidus (Heteroptera, Pentatomidae)

2009 ◽  
Vol 83 (2) ◽  
pp. 69-76 ◽  
Author(s):  
W. P. Lemos ◽  
J. C. Zanuncio ◽  
F. S. Ramalho ◽  
V. V. Zanuncio ◽  
J. E. Serrão
Keyword(s):  
Ovarian Development ◽  
Heteroptera Pentatomidae
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