scholarly journals The Thalassinidean Mud Shrimp Upogebia vasquezi: Life Cycle and Reproductive Traits on the Amazonian Coast, Brazil

2017 ◽  
Author(s):  
Danielly Brito de Oliveira ◽  
Fernando Araújo Abrunhosa ◽  
Jussara Moretto Martinelli-Lemos
Keyword(s):  
Life Cycle ◽  
Reproductive Traits ◽  
Mud Shrimp

Life cycle and reproductive traits of the earthworm Aporrectodea trapezoides (Dugès, 1828) in laboratory cultures

Pedobiologia ◽  
2010 ◽  
Vol 53 (5) ◽  
pp. 295-299 ◽  
Author(s):  
Rosa Fernández ◽  
Marta Novo ◽  
Mónica Gutiérrez ◽  
Ana Almodóvar ◽  
Darío J. Díaz Cosín
Keyword(s):  
Life Cycle ◽  
Reproductive Traits ◽  
Aporrectodea Trapezoides ◽  
Laboratory Cultures

scholarly journals ESTIMATION OF STANDARD HETEROSIS FOR REPRODUCTIVE TRAITS IN NEWLY SYNTHESIZED TEST RICE (Oryza sativa L.) HYBRIDS

2015 ◽  
Vol 28 (1) ◽  
pp. 9-16
Author(s):  
M. Ariful Islam ◽  
M. A. K. Mian ◽  
M. G. Rasul ◽  
M. K. Bashar
Keyword(s):  
Oryza Sativa ◽  
Life Cycle ◽  
Oryza Sativa L ◽  
Reproductive Traits ◽  
Great Contribution ◽  
Standard Heterosis ◽  
Positive Heterosis

An experiment was carried to estimate heterotic performances of newly developed test hybrids utilizing CMS system during Rabi 2011 using RCBD design. Five known CMS lines and sixteen developed R-lines were crossed through line × tester analysis. Eighty test hybrids were developed. It is very difficult to find a hybrid earlier to BRRI dhan28 as life cycle of 140 days. Heterosis for days to first flowering varied from -6.23% to 16.35% with a SD of 4.47 meanwhile heterosis for days to 80% flowering varied from -9.24% to 11.04% with a SD of 4.03. Among eighty crosses seventy two were found positive heterosis for days to first flowering but sixty four crosses were found for days to 80% flowering. RG-BU08-016R crosses with IR58025A (-2.68*) and IR62820A (-3.42**) showed significant negative standard heterosis for days to first flowering. Five crosses of IR58025A showed significant negative heterosis with RG-BU 08-005R (-3.42*), RG-BU 08-006R (-5.28**), RG-BU 08-013R (-4.129**), RG-BU 08-016R (-5.78**), RG-BU 08-018R (-4.06*) for days to 80% flowering. Besides these 4 crosses of IR62820A showed significant negative heterosis with RG-BU 08-007R (-2.32*), RG-BU 08-016R (-6.03*), RG-BU 08-018R (-4.58**) followed by GAN 46A/RG-BU 08-006R (-4.58*), BRRI 1A/RG-BU 08-001R (-2.55**) and BRRI 1A/RG-BU 08-006R (-9.24**) resulted significant negative heterosis for days to 80% flowering. Positive heterosis were recorded for IR58025A with RG-BU 08-007R (26.97**), RG-BU 08-0046R (8.77**) and RG-BU 08-105R (14.44**) for PER and RG-BU 08-018R (42.46**), RG-BU 08-046R (112.30**), RG-BU 08-057R (27.46*) for SER. While two R-lines, RG-­BU 08-013R (25.41**) and RG-­BU 08-057R (7.21*) were found having significant positive heterosis for panicle exertion rate crosses with IR62820A but RG-BU 08-025R (52.82**), RG-BU 08-057R (122.66**) and RG-BU 08-063R (37.38**) were found having significant positive heterosis for SER. IR62820A/RG-BU08-057R showed significant positive heterosis for both panicle and stigma exertion rate. GAN46A/RG­-BU 08-063R (5.65* & 133.02**) was recorded showing significant positive heterosis for both panicle and stigma exertion rate where. But the crosses of IR68888A was not shown exhibiting a great contribution for panicle and stigma exertion rate except RG-BU08-018R (25.94**). Meanwhile the crosses of BRRI1A was recorded having significant positive heterosis for PER with RG-­BU08-005R (13.41**), RG-­BU08-007R (5.65*) and RG-BU08-097R (25.94**) as well as RG-BU08-007R (133.02**), RG-BU08-013R (48.19**) and RG-BU08-038R (29.21*) were recorded having significant positive heterosis for SER.

Biology and reproductive traits of Drymoea veliterna (Druce, 1885) (Lepidoptera: Geometridae)

2017 ◽  
Vol 5 (12) ◽  
pp. 1 ◽  
Author(s):  
Linda Carlina Hernandez ◽  
Gonzalo Fajardo ◽  
Luz Stella Fuentes ◽  
Lorenzo Comoglio
Keyword(s):  
Life Cycle ◽  
Reproductive System ◽  
Reproductive Tract ◽  
Reproductive Traits ◽  
Female Genitalia ◽  
Bursa Copulatrix ◽  
Male And Female ◽  
Average Fecundity

Despite the urban and landscape impact caused by Drymoea veliterna (Druce, 1885) (Lepidoptera: Geometridae) larvae on trees of the genus Croton L. (Euphorbiaceae) in the Neotropics, there is no information about its biology and reproductive traits. In this study, we describe the life cycle and reproductive traits of this species. Its life cycle lasts approximately 56 days, the larvae develop during 24 days on average and the longevity of the females is 7 days on average. Females have an average fecundity of 207 eggs. Regarding their reproductive system, the presence of previtellogenic eggs in the reproductive tract of the females is emphasized. The bursa copulatrix and a highly sclerotized signum is depicted. The number of spermatophores found in the reproductive tract of the females was quantified. Male and female genitalia were schematized.

scholarly journals Trichospilus diatraeae (Hymenoptera: Eulophidae): development and reproduction in Lepidoptera palm oil pests

2019 ◽  
Vol 79 (3) ◽  
pp. 377-382 ◽  
Author(s):  
R. C. Ribeiro ◽  
T. G. Pikart ◽  
H. A. Fouad ◽  
M. C. Parreira ◽  
J. C. Zanuncio ◽  
...  
Keyword(s):  
Life Cycle ◽  
Sex Ratio ◽  
Palm Oil ◽  
Oil Palm ◽  
Reproductive Traits ◽  
Number Of Individuals

Abstract Brazil is a leading palm oil producer, but the defoliating caterpillars Opsiphanes invirae Hübner Brassolis sophorae L. (Lepidoptera: Nymphalidae) can reduce the productivity of this crop. The aim of this study was to evaluate the development and reproduction of the parasitoid Trichospilus diatraeae Cherian & Margabandhu (Hymenoptera: Eulophidae) in pupae of these oil palm defoliators. Ten O. invirae or B. sophorae pupae with up to two days old were exposed each to 30 T. diatraeae females for 48 hours. Parasitism and emergence of the progeny of T. diatraeae were similar in pupae of both Lepidoptera defoliators. The life cycle of this parasitoid was shorter in O. invirae (21.50 ± 0.42 days) pupae than with those of B. sophorae (27.60 ± 1.80 days). The number of the progeny (669.00 ± 89.62) and dead immature (217.13 ± 58.18) of T. diatraeae were higher in B. sophorae pupae than in those of O. invirae with 447.83 ± 51.52 and 13.50 ± 5.23, respectively. The sex ratio and female and male longevity of T. diatraeae emerged from these hosts were similar. The reproductive traits, especially the number of individuals (offspring) of T. diatraeae were better with B. sophorae pupae than with those of O. invirae.

scholarly journals Unveiling asexual reproductive traits in black corals: polyp bail-out in Antipathella subpinnata

Coral Reefs ◽  
2020 ◽  
Vol 39 (6) ◽  
pp. 1517-1523
Author(s):  
Martina Coppari ◽  
Lara Fumarola ◽  
Lorenzo Bramanti ◽  
Pascal Romans ◽  
Rémi Pillot ◽  
...  
Keyword(s):  
Life Cycle ◽  
Environmental Conditions ◽  
Reproductive Traits ◽  
First Report ◽  
Survival Mechanism ◽  
Black Coral ◽  
Black Corals ◽  
Adverse Environmental Conditions ◽  
Bail Out ◽  
Reverse Development

AbstractCnidarians are known to undergo reverse development as a survival mechanism against adverse environmental conditions. Polyp bail-out consists in the polyps’ detachment from the mother colony due to stressful conditions, followed by a complete tissue and cells rearrangement and in some cases in a regression into a simple, ciliated form. Here we describe a massive polyp bail-out event occurred in the mesophotic black coral Antipathella subpinnata in reared conditions. This is the first report of a bail-out event in this species providing new insights into the life cycle and ecology of black corals.

scholarly journals A new brood-pollination mutualism between Stellera chamaejasme and flower thrips Frankliniella intonsa

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Bo Zhang ◽  
Shu-Fan Sun ◽  
Wang-Long Luo ◽  
Jia-Xin Li ◽  
Qiang-En Fang ◽  
...  
Keyword(s):  
Life Cycle ◽  
Host Plants ◽  
Reproductive Traits ◽  
Flowering Phenology ◽  
Breeding Sites ◽  
Flower Thrips ◽  
Relative Contribution ◽  
Floral Longevity ◽  
Pollination Mutualism ◽  
Stellera Chamaejasme

Abstract Background Brood pollination mutualism is a special type of plant-pollinator interaction in which adult insects pollinate plants, and the plants provide breeding sites for the insects as a reward. To manifest such a mutualism between Stellera chamaejasme and flower thrips of Frankliniella intonsa, the study tested the mutualistic association of the thrips life cycle with the plant flowering phenology and determined the pollination effectiveness of adult thrips and their relative contribution to the host’s fitness by experimental pollinator manipulation. Results The adult thrips of F. intonsa, along with some long-tongue Lepidoptera, could serve as efficient pollinators of the host S. chamaejasme. The thrips preferentially foraged half-flowering inflorescences of the plants and oviposited in floral tubes. The floral longevity was 11.8 ± 0.55 (mean ± se) days, which might precisely accommodate the thrips life cycle from spawning to prepupation. The exclusion of adult thrips from foraging flowers led to a significant decrease in the fitness (i.e., seed set) of host plants, with a corresponding reduction in thrips fecundity (i.e., larva no.) in the flowers. Conclusions The thrips of F. intonsa and the host S. chamaejasme mutualistically interact to contribute to each other’s fitness such that the thrips pollinate host plants and, as a reward, the plants provide the insects with brooding sites and food, indicating the coevolution of the thrips life cycle and the reproductive traits (e.g., floral longevity and morphology) of S. chamaejasme.

scholarly journals Evolution of life cycles and reproductive traits: insights from the brown algae

2019 ◽  
Author(s):  
Svenja Heesch ◽  
Martha Serrano-Serrano ◽  
Rémy Luthringer ◽  
Akira F. Peters ◽  
Christophe Destombe ◽  
...  
Keyword(s):  
Life History ◽  
Life Cycle ◽  
Sex Determination ◽  
Brown Algae ◽  
Life History Traits ◽  
Reproductive Traits ◽  
Life Cycles ◽  
System Level ◽  
Sexual Systems ◽  
Reproductive Life

ABSTRACTBrown algae are characterized by a remarkable diversity of life cycles, sexual systems, and reproductive modes, and these traits seem to be very labile across the whole group. This diversity makes them ideal models to test existing theories on the evolution of alternation between generations, and to examine correlations between life cycle and reproductive life history traits. In this study, we investigate the dynamics of trait evolution for four life-history traits: life cycle, sexual system, level of gamete dimorphism and gamete parthenogenetic capacity. We assign states to up to 70 species in a multi-gene phylogeny of brown algae, and use maximum likelihood and Bayesian analyses of correlated evolution, taking phylogeny into account, to test for correlations between life history traits and sexual systems, and to investigate the sequence of trait acquisition. Our analyses are consistent with the prediction that diploid growth may evolve because it allows the complementation of deleterious mutations, and that haploid sex determination is ancestral in relation to diploid sex determination. However, the idea that increased zygotic and diploid growth is associated with increased sexual dimorphism is not supported by our analysis. Finally, it appears that in the brown algae isogamous species evolved from anisogamous ancestors.

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