scholarly journals Does exposure of maleDrosophila melanogasterto acute gamma radiation influence egg to adult development time and longevity of F1-F3offspring?

2014 ◽  
Vol 18 (3) ◽  
pp. 368-376 ◽  
Author(s):  
P. Mohamed Shameer ◽  
K. Sowmithra ◽  
B. P. Harini ◽  
R. C. Chaubey ◽  
S. K. Jha ◽  
...  
Keyword(s):  
Gamma Radiation ◽  
Adult Development ◽  
Development Time

The molecular through ecological genetics of abnormal abdomen in Drosophila mercatorum. VI. The non-neutrality of the Y chromosome rDNA polymorphism.

Genetics ◽  
1994 ◽  
Vol 136 (4) ◽  
pp. 1373-1384
Author(s):  
H Hollocher ◽  
A R Templeton
Keyword(s):  
Y Chromosome ◽  
Adult Development ◽  
Sexual Maturation ◽  
Development Time ◽  
Ecological Genetics ◽  
Pleiotropic Effects ◽  
Naturally Occurring ◽  
Drosophila Mercatorum ◽  
Rdna Polymorphism ◽  
Male Expression

Abstract An association between quantitative variation of rDNA on the Y chromosome and male expression of the juvenilized, adult cuticle of the abnormal abdomen syndrome has been found for Drosophila mercatorum. Many pleiotropic effects of this syndrome have been described previously for females, but little was known about possible pleiotropic effects in males. The effects on males open up new avenues for the action of natural selection operating on the system. In females, the syndrome causes an increase in egg-to-adult development time, precocious sexual maturation, increased fecundity and decreased longevity. In addition to the cuticle phenotype, in males abnormal abdomen causes delayed sexual maturation, increased longevity, and decreased mating success, yet no change in egg-to-adult development time. Thus the syndrome has opposing fitness effects in the two sexes, which may help explain the genetic polymorphism observed in this system. Although investigated intensively, associations between naturally occurring Y-linked polymorphism and fitness phenotypes have not been found in Drosophila melanogaster.

Life-History Data of a Mexican Population of Triatoma nitida (Hemiptera: Reduviidae)

2019 ◽  
Vol 57 (1) ◽  
pp. 33-38 ◽  
Author(s):  
J Alejandro Martínez-Ibarra ◽  
Tzintli Meraz-Medina ◽  
Benjamin Nogueda-Torres ◽  
María E Villagrán-Herrera ◽  
Jose A de Diego-Cabrera
Keyword(s):  
Adult Development ◽  
Development Time ◽  
Onset Time ◽  
Vectorial Capacity ◽  
Feeding Time ◽  
Life History Data ◽  
First Instar ◽  
Surveillance Programs ◽  
Blood Meals ◽  
Observation Period

Abstract This study reports the third collection of Triatoma nitida Usinger in Mexico, with a brief description of the collection area and an investigation of parameters related to its vectorial capacity. Whether a triatomine (Hemiptera: Reduviidae) species is a primary or secondary vector is determined by factors that include vectorial capacity, anthropophilic habits, geographic distribution, and capacity to invade and colonize human dwellings. However, when the primary vectors are removed, secondary vectors, such as T. nitida, can become important transmitters of Trypanosoma cruzi Chagas to humans. To estimate the vectorial capacity of T. nitida, the egg-to-adult development time, number of blood meals required to molt to the adult stage, accumulative mortality, onset time for feeding, and feeding and defecation times were examined. Triatoma nitida (n = 100) required a median of 590 d to complete its development time, with a median of 31 blood meals. Almost half (46.5%) of the nymphs died during the cycle. The onset of feeding time exceeded 5 min in all nymphal instars (except on fourth-instar) and adults and feeding times exceeded 22 min in all instars, except on first-instar nymphs. No defecation was observed for 65.6% (n = 383) of the triatomines during a 30-min observation period. Based on the six parameters, the vectorial capacity of T. nitida should be considered as low. However, surveillance programs should include this species because the potential importance of T. nitida as a vector has been demonstrated in other countries.

Re-description and biology of Parastethynium maxwelli (Hymenoptera: Mymaridae), an egg parasitoid of Zophiuma lobulata (Hemiptera: Lophopidae), and description of a new species of Parastethynium from Indonesia

Zootaxa ◽  
2011 ◽  
Vol 2733 (1) ◽  
pp. 49 ◽  
Author(s):  
JOHN T. HUBER ◽  
CATHERINE W. GITAU ◽  
GEOFF M. GURR ◽  
CHARLES F. DEWHURST ◽  
MURRAY J. FLETCHER
Keyword(s):  
New Species ◽  
Relative Humidity ◽  
Papua New Guinea ◽  
Adult Development ◽  
Oil Palm ◽  
Development Time ◽  
First Record ◽  
Egg Parasitoid ◽  
Basic Biology ◽  
A New Species

Both sexes of Parastethynium maxwelli (Girault), a parasitoid of Zophiuma lobulata Ghauri eggs on coconut and oil palm in Papua New Guinea, are described and illustrated. The second known species in the genus Parastethynium, P. hirsutum Huber sp. n., from Indonesia (Sulawesi) is also described. The latter represents the first record from the Oriental region. The basic biology of P. maxwelli is presented. Mean progeny produced per female was 57 with a female proportion of 0.59. Mean egg to adult development time was 11 days, at 24.5 o C−29.7 o C and 72−93% relative humidity. Survival time of females and males fed on honey and water was longer compared to males and differed significantly with those provided with water only or nothing at all.

Development and larval diapause in the southern African dung beetle Onitis caffer Boheman (Coleoptera: Scarabaeidae)

1986 ◽  
Vol 76 (1) ◽  
pp. 109-117 ◽  
Author(s):  
Penelope B. Edwards
Keyword(s):  
Adult Development ◽  
Development Time ◽  
Larval Instar ◽  
Summer Rainfall ◽  
Dry Weight ◽  
Dung Beetle ◽  
Cattle Dung ◽  
Winter Rainfall ◽  
The Third ◽  
Larval Diapause

AbstractThe development of Onitis caffer Boheman in cattle dung was studied in the laboratory. The larvae feed on the dung in which the eggs are laid. Egg to adult development at 25°C was completed in 24·7 weeks by a strain from a winter rainfall (WR) area of South Africa and 29·4 weeks by a strain from a summer rainfall (SR) area, and occurred without diapause. Maximum larval dry weight was achieved mid-way through the third larval instar, after which the larva emptied much of its gut to form a protective faecal shell, in which pupation occurred. At 20°C, 20% of WR larvae developed without diapause and the adults emerged after 33·5 weeks, whereas the remaining 80% of adults emerged after 80·1 weeks. In the SR strain, 70% emerged after 37·1 weeks without having entered diapause, while the remaining 30% emerged after 83·8 weeks. Thus, the period of diapause for both strains was 47 weeks and occurred in the third larval instar. At 15°C, 74% of WR larvae had pupated by 153 weeks, with a mean development time of 121·8 weeks. Zero development temperatures were 10·4°C (WR) and 10·1°C (SR), and day-degree requirements for development without diapause at 20°C were 2251 (WR) and 2571 (SR).

Description of the life-history stages of Amphiascus undosus Lang (Copepoda, Harpacticoida)

1991 ◽  
Vol 69 (2) ◽  
pp. 512-527 ◽  
Author(s):  
Graham J. McMillan
Keyword(s):  
Adult Development ◽  
Development Time ◽  
Harpacticoid Copepod ◽  
Original Description ◽  
Sexually Dimorphic ◽  
Single Female ◽  
Type Specimens ◽  
Life History Stages ◽  
Harpacticoid Copepods ◽  
Similarities And Differences

The six naupliar and six copepodite stages of the harpacticoid copepod Amphiascus undosus Lang are described in detail. Thoracic leg segmentation and armature are presented in tabular form for the copepodite stages. The species becomes sexually dimorphic at the fourth copepodite stage. Average egg-to-adult development time is approximately 31.5 days at 22 ± 1 °C. Up to four successive pairs of egg sacs from a single female are produced in the laboratory, yielding a maximum of 76 progeny. Some discrepancies exist between the original description of the California type specimens and the present British Columbia material, particularly in the adult male maxillule, maxilliped, and first, fifth, and sixth legs, and the caudal setae of the adult female. A brief comparison is made with the developmental similarities and differences of six other diosaccid harpacticoid copepods.

The influence of host quality on progeny and sex allocation in the pupal ectoparasitoid,Muscidifurax raptorellus(Hymenoptera: Pteromalidae)

1998 ◽  
Vol 88 (3) ◽  
pp. 299-304 ◽  
Author(s):  
J.A. Harvey ◽  
G.J.Z. Gols
Keyword(s):  
Sex Ratio ◽  
Clutch Size ◽  
Adult Development ◽  
Development Time ◽  
Host Quality ◽  
Adult Size ◽  
Female Progeny ◽  
Interspecific Differences ◽  
Adult Parasitoid ◽  
Secondary Sex Ratio

AbstractMuscidifurax raptorellusKogan & Legner is a gregarious pteromalid ectoparasitoid that attacks pupae and pharate adults from several families of the higher Diptera. Egg-to-adult development time, adult parasitoid size and emerging offspring ( = secondary) sex ratio ofM. raptorelluswere compared with clutch size in two hosts that differed greatly in mass, the smallMusca domesticaLinnaeus and the largerCalliphora vomitoriaLinnaeus. The mean number of emerging parasitoids did not vary significantly with host species, although slightly higher clutch sizes were recorded inC. vomitoria. Irrespective of offspring sex, parasitoids completed development more rapidly inM. domesticathan inC. vomitoria. In the small host, the development time and adult size ofM. raptorelluswere negatively correlated with clutch size. By contrast, female parasitoid size was unaffected by clutch size in the larger host,C. vomitoria. In both hosts, female parasitoids were significantly larger than male parasitoids. The secondary sex ratio (percentage males) of emerging parasitoids was significantly lower inC. vomitoria, and varied with clutch size in both hosts. InC. vomitoria, the greatest proportion of females emerged from hosts with the highest clutch sizes, whereas inM. domesticahosts with the highest clutch sizes produced the lowest proportion of female progeny. The results described here show that the development ofM. raptorellusis profoundly affected by interspecific differences in host quality. Our results suggest that mating structure and host quality have potentially different effects on sex ratio decisions inM. raptorellus, and perhaps other gregarious parasitoids.

Effects of egg-to-adult development time and adult age on olfactory neuron response to semiochemicals in European corn borers

2006 ◽  
Vol 52 (9) ◽  
pp. 975-983 ◽  
Author(s):  
Michael J. Domingue ◽  
Wendell L. Roelofs ◽  
Charles E. Linn ◽  
Thomas C. Baker
Keyword(s):  
Adult Development ◽  
Development Time ◽  
Olfactory Neuron ◽  
Adult Age ◽  
Corn Borers ◽  
Neuron Response
Sign in / Sign up

Export Citation Format

Share Document