Ovarian development and lipid reserves are affected by mating delays in three species of Anthocoris (Hemiptera: Anthocoridae)

2005 ◽  
Vol 137 (3) ◽  
pp. 328-336 ◽  
Author(s):  
David R. Horton ◽  
Tamera M. Lewis ◽  
Lisa G. Neven
Keyword(s):  
Ovarian Development ◽  
Oocyte Development ◽  
Ovarian Maturation ◽  
Allocation Of Resources ◽  
Female Age ◽  
Trade Off ◽  
Preoviposition Period ◽  
Development Duration

AbstractMating is necessary to bring about ovarian maturation in females of Anthocoridae and related taxa (Cimicidae). The objectives of this study were to determine how forced delays in mating affect extent and rate of oocyte development, duration of the preoviposition period, and levels of lipid reserves in three species of Anthocoris. Extent of oocyte development by unmated females differed among the three species. In unmated A. tomentosus, the basal oocyte failed to show any increase in size with increasing female age, whereas oocytes in unmated A. nemoralis and A. whitei exhibited some growth beginning 2 days after eclosion. One consequence of these differences among species is that a forced delay in mating (of 3 or 10 days) had less of an effect on A. whitei and A. nemoralis than on A. tomentosus, in terms of the length of the preoviposition period measured from the time of mating. Mated females of A. nemoralis and A. whitei grew larger oocytes than unmated females within 2 days of mating, whereas the same phenomenon took 4 days in A. tomentosus. Embryos became visible in the eggs of mated A. nemoralis and A. whitei 2–3 days after mating, compared with 5 days after mating for A. tomentosus. Mature eggs with egg caps were visible within 3, 4, and 6 days after mating for A. nemoralis, A. whitei, and A. tomentosus, respectively. In all three species, unmated females 10 days after eclosion had significantly higher levels of lipids allocated to nonreproductive tissues than similarly aged females that had been mated on the day of eclosion, suggesting that there was a trade-off between allocation of resources to eggs and allocation to somatic reserves.

Ovarian development in female armyworm moths, Pseudaletia unipuncta: its relationship with pheromone release activities

1989 ◽  
Vol 67 (6) ◽  
pp. 1380-1385 ◽  
Author(s):  
Michel Cusson ◽  
Jeremy N. McNeil
Keyword(s):  
Developmental Stage ◽  
Temporal Relationship ◽  
Ovarian Development ◽  
Oocyte Development ◽  
Ovarian Maturation ◽  
Pseudaletia Unipuncta ◽  
Pheromone Release ◽  
Pheromone Titer ◽  
First Time ◽  
Lepidoptera Noctuidae

Following a chronological evaluation of ovarian maturation in virgin females, the temporal relationship between oocyte development and the initiation of calling in Pseudaletia unipuncta (Haw.) (Lepidoptera: Noctuidae) was investigated. One hundred and sixty females were observed daily during the last 2 h of the scotophase for a period of 2–8 days after emergence. Every day, females that called for the first time were sacrificed at lights-on for pheromone titer analysis and oocyte measurements and egg counts. Concurrently, noncallers of the same age were randomly selected and submitted to the same analyses. Although some females started calling and synthesizing pheromone before their oocytes reached maturity (0.59 mm in width), none with basal oocytes smaller than 0.33 mm in width (N = 17) called and only three had detectable pheromone titers (ca. 2 ng). First-time callers on days 2–5 after emergence had greater (i) numbers of mature eggs, (ii) basal oocyte widths, and (iii) pheromone titers than noncallers of the same age, although differences were not always statistically significant. Ovaries of females that initiated calling on days 3–5 were at a similar developmental stage, but were significantly more mature than those of females calling for the first time on day 2.

Dynamics of fatty acid regulatory genes during ovarian development in Penaeus monodon

Reproduction ◽  
2018 ◽  
Author(s):  
Pacharawan Deenarn ◽  
Punsa Tobwor ◽  
Rungnapa Leelatanawit ◽  
Somjai Wongtriphop ◽  
Jutatip Khudet ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Ovarian Development ◽  
Penaeus Monodon ◽  
Chain Fatty Acid ◽  
Regulatory Genes ◽  
Ovarian Maturation ◽  
Long Chain Fatty Acid ◽  
Eyestalk Ablation ◽  
Regulatory Pathways ◽  
Expression Levels

The delay in ovarian maturation in farmed black tiger shrimp Penaeus monodon has resulted in the widespread practice of feeding broodstock with the polychaetes Perinereis nuntia and their unilateral eyestalk ablation. Although this practice alters fatty acid content in shrimp ovaries and hepatopancreas, its effects on fatty acid regulatory genes have yet to be systematically examined. Here, microarray analysis was performed on hepatopancreas and ovary cDNA collected from P. monodon at different ovarian maturation stages, revealing that 72 and 58 genes in fatty acid regulatory pathways were differentially expressed in hepatopancreas and ovaries respectively. Quantitative real-time PCR analysis revealed that ovarian maturation was associated with higher expression levels of acetyl-CoA acetyltransferase, acyl-CoA dehydrogenase, acyl-CoA oxidase 3 and long-chain fatty acid transport protein 4 in hepatopancreas, whereas the expression levels of 15 fatty acid regulatory genes were increased in shrimp ovaries. To distinguish the effects of different treatments, transcriptional changes were examined in P. monodon with stage 1 ovaries before polychaete feeding, after one-month of polychaete feeding and after eyestalk ablation. Polychaete feeding resulted in lower expression levels of enoyl-CoA hydratase and acyl-CoA synthetase medium-chain family member 4, while the expression level of phosphatidylinositide phosphatase SAC1 was higher in shrimp hepatopancreas and ovaries. Additionally, eyestalk ablation resulted in a higher expression level of long-chain fatty acid-CoA ligase 4 in both tissues. Together, our findings describe the dynamics of fatty acid regulatory pathways during crustacean ovarian development and provide potential target genes for alternatives to eyestalk ablation in the future.

Effects of gonadotropin-releasing hormones and dopamine on ovarian maturation in the Pacific white shrimp, Litopenaeus vannamei, and their presence in the ovary during ovarian development

Aquaculture ◽  
2014 ◽  
Vol 420-421 ◽  
pp. 79-88 ◽  
Author(s):  
Yotsawan Tinikul ◽  
Jaruwan Poljaroen ◽  
Ruchanok Tinikul ◽  
Panat Anuracpreeda ◽  
Charoonroj Chotwiwatthanakun ◽  
...  
Keyword(s):  
Litopenaeus Vannamei ◽  
Ovarian Development ◽  
Pacific White Shrimp ◽  
White Shrimp ◽  
Ovarian Maturation ◽  
The Pacific

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.

The effect of adult feeding on female pre-calling period and ovarian development in a migratory moth, the Oriental armyworm Mythimna separata (Lepidoptera: Noctuidae)

1991 ◽  
Vol 81 (4) ◽  
pp. 395-400 ◽  
Author(s):  
Er-ning Han ◽  
A. Gavin Gatehouse
Keyword(s):  
Ovarian Development ◽  
Intermediate Stage ◽  
Oocyte Development ◽  
Mythimna Separata ◽  
Reproductive Maturity ◽  
Calling Behaviour ◽  
Genetic Components ◽  
Adult Feeding ◽  
Oriental Armyworm ◽  
Migratory Strategies

AbstractFemale oriental armyworm moths, Mythimna separata (Walker), emerged without discernible oocytes in the ovarioles, and reproductive maturity, on the criterion of onset of calling behaviour, was associated with an intermediate stage of oocyte development. Ingestion of carbohydrate was required for completion of oocyte development in the majority of females although a proportion matured when allowed only water. Among females kept alone, these were exclusively moths from a strain selected for early onset of calling but, in the presence of a male, a few females from an unselected line also called and achieved oocyte maturation, without access to carbohydrate. Thus factors other than ovarian development apparently influence the commencement of calling. The absence of an effect of carbohydrate uptake on pre-calling period supports a previous conclusion that this trait is determined primarily by genetic components in this species. It is concluded that ingestion of carbohydrate is important for the attainment of reproductive maturity in M. separata but that it has a differential effect in early and later-calling genotypes. The implications of the results for the reproductive and migratory strategies of M. separata, an important agricultural pest, are discussed.

Male influence on the ovarian development of the crustacean parasite Bopyrina abbreviata (Isopoda, Bopyridae)

2016 ◽  
Vol 97 (1) ◽  
pp. 91-98 ◽  
Author(s):  
Jesús Romero-Rodríguez ◽  
Ramiro Román-Contreras ◽  
José Luis Bortolini-Rosales
Keyword(s):  
Ovarian Development ◽  
Mature Female ◽  
Ovarian Maturation ◽  
Female Reproduction ◽  
Germinal Layer ◽  
Terrestrial Isopods ◽  
Ovarian Cells ◽  
Terminos Lagoon ◽  
The One ◽  
Ventral Wall

The presence of a male in a population of terrestrial isopods can accelerate the onset of female reproduction, a feature that has been suggested also to occur in bopyrid isopods. This paper aims to estimate the influence of the male presence on the ovarian maturation of Bopyrina abbreviata. Females of B. abbreviata of different sizes were collected at Términos lagoon, Campeche, Mexico. The organisms were morphometrically classified as immature or mature, the male presence or absence at female's marsupium was recorded, and the degree of ovarian development was determined histologically. The internal organization of B. abbreviata agrees with that described for bopyrids and isopods in general. The ovarian cells originate from a dorsal lamina germinal layer that extends horizontally. The ovarian development of lone and paired immature females was classified as incipient and medium, respectively. In mature females it was classified as advanced, in the paired females and in the one lone mature female studied. The lone mature female differed from paired mature females only in the presence of reabsorption process in some oocytes located closer to the ventral wall of the ovary. Morphology variations between lone and paired females suggests that the presence of a cryptoniscus larva or a male between the female's pleopods stimulates the onset of reproduction and accelerates the ovarian development of B. abbreviata.

RESISTANCE AGAINST WHITE PINE WEEVIL: EFFECTS ON WEEVIL REPRODUCTION AND HOST FINDING

1998 ◽  
Vol 130 (3) ◽  
pp. 337-347 ◽  
Author(s):  
T.S. Sahota ◽  
J.F. Manville ◽  
F.G. Peet ◽  
E.E. White ◽  
A.I. Ibaraki ◽  
...  
Keyword(s):  
Ovarian Development ◽  
Field Performance ◽  
Tree Breeding ◽  
Host Finding ◽  
Picea Sitchensis ◽  
Ovarian Maturation ◽  
White Pine ◽  
Pissodes Strobi ◽  
Pine Weevils ◽  
White Pine Weevil

AbstractFeeding on leaders of resistant Sitka spruce trees, Picea sitchensis (Bong.) Carr., Led to ovarian regression in white pine weevils, Pissodes strobi Peck., that contained already mature eggs at the time of caging on leaders. Such feeding also led to inhibition or a virtual blockage of ovarian development in weevils that did not contain already mature eggs at the time of caging. Ovarian maturation in such weevils was restored by application of juvenile hormone to female weevils. Effects of three levels of resistance were consistent within the experiments and with the field performance of the tested clones. These results indicate that the effects of resistance were postingestive, i.e., resistance was a form of antibiosis. How antibiosis can cause the weevils to concentrate oviposition on susceptible trees is discussed. Results also provide a means of selecting and ranking resistance of individual spruce trees for tree breeding and reforestation.

scholarly journals Ovarian development in Arhopalus ferus (Coleoptera Cerambycidae)

2015 ◽  
Vol 68 ◽  
pp. 451-451
Author(s):  
A.M. Barrington ◽  
D.P. Logan
Keyword(s):  
Introduced Species ◽  
Ovarian Development ◽  
Maximum Size ◽  
Maximum Length ◽  
Oocyte Development ◽  
Exit Hole ◽  
Optimum Time ◽  
Sawn Timber ◽  
Chewing Behaviour

Burnt pine longhorn (BPL) Arhopalus ferus Burnt pine longhorn (BPL) Arhopalus ferus (Mulsant) (Coleoptera Cerambycidae) is an introduced species sometimes found in association with export logs and sawn timber In this study oocyte development was assessed at a constant 15 20 and 25C and behaviour was observed with the aim of determining optimal mating age for laboratoryreared insects At eclosion females were kept in 60 ml cups at 15 20 and 25C with a strip of cardboard as a resting site and frozen at 4 3 and 2day intervals respectively for dissection At 15 20 and 25C the first oocytes reached maximum length and were chorionated at ca 25 12 and 10 days respectively Cardboard chewing was observed from ca 20 10 and 8 days at 15 20 and 25C respectively Chewing behaviour may mimic the wild adult clearing its exit hole before leaving the decaying tree and corresponds with the approximate period that earliest oocytes have reached maximum size Based on these results the optimum time for pairing laboratoryreared adults kept at 20C is later than 10 days after eclosion Subsequently adults reared at 20C and paired when they were 1415 days old mated and began egglaying immediately

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