scholarly journals Diet enrichment and the reproductive season of captive Sunda Porcupine (Hystrix javanica F. Cuvier 1823)

2020 ◽  
Vol 19 ◽  
pp. 00011
Author(s):  
Nurul Inayah ◽  
Andri Permata Sari ◽  
Wartika Rosa Farida ◽  
Herjuno Ari Nugroho ◽  
Tri Hadi Handayani ◽  
...  
Keyword(s):  
Reproductive Biology ◽  
Sperm Motility ◽  
Birth Rate ◽  
Environmental Enrichment ◽  
Current Knowledge ◽  
Reproductive Season ◽  
Interbirth Interval ◽  
Bean Sprout ◽  
Birth Peak ◽  
Fresh Tomato

This study aimed to extend our current knowledge of Sunda porcupine reproductive biology with emphasis on environmental enrichment and the reproductive season. Tomato and bean sprout feeding able to increase sperm quantity, sperm motility, and viability, as well as increase FSH and estrogen hormone levels. Four pairs of captive Sunda porcupine were used. Two pairs (fed with fresh tomato and bean sprout, enrichment group) and two pairs as control. The birth rate of enrichment group higher (with twin litter per year) than that in control (only one litter per year). It indicated that tomato and bean sprout feeding affect the birth rate in Sunda porcupine. The recent study showed that captive Sunda porcupine births occurred throughout the year, with no more than 1-2 litter per year and are have no interbirth-interval. The birth peak of captive Sunda porcupine occurs between April to August. Biparental activities during birth occurred. However, the female spent 50% of the time with the newborn. There was no courtship behaviour throughout the first two or three months of life of the cub.

Reproductive biology of Polybius henslowii Leach, 1820 (Decapoda, Polybiidae): a discard species from the northwestern Portuguese beam trawl fishery

Crustaceana ◽  
2014 ◽  
Vol 87 (7) ◽  
pp. 784-800 ◽  
Author(s):  
L. Magalhães ◽  
M. Felício ◽  
M. B. Gaspar ◽  
V. Quintino ◽  
A. M. Rodrigues
Keyword(s):  
Reproductive Biology ◽  
Current Knowledge ◽  
Carapace Width ◽  
Fishing Gear ◽  
Northern Coast ◽  
Beam Trawl ◽  
Total Catch ◽  
Important Species ◽  
Trawl Fishery ◽  
Minimum Landing Size

Polybius henslowii Leach, 1820, a Portunid crab distributed from the British Isles to Morocco and the Mediterranean Sea is caught in high densities by many types of fishing gear and frequently thrown back to the sea. Along the northern coast of Portugal, P. henslowii is an important species discarded in beam trawl fishery. There are no quantitative estimations of discards and very little is known about its biology, information that is needed to value this species. The present work was conducted from March 2007 to December 2010 in order to improve the current knowledge of the reproductive biology of P. henslowii. By-catches were registered aboard commercial vessels that volunteered to participate in the study. In that period P. henslowii represented 57.3% of the total catch and was present in all hauls analysed. The target species, Palaemon serratus (Pennant, 1777), represented 1.2% of the total catch, showing the low selectivity of the fishing gear and the need for suppression of this gear to catch this shrimp species. Differences in size between sexes were found, with males being larger and heavier than females. Mature females occurred mainly in autumn and the carapace width at which 50% of the females reach maturity was estimated to be 37.8 mm, which could be set as the minimum landing size of this potential exploitable resource. A macroscopic ovarian maturity stages classification was proposed, allowing a rapid field assessment of female sexual maturity. This study fills a gap in the knowledge of a very important species discarded in beam trawl fishery that may be basis of further work.

P–072 Pregnancy rate in male factor infertility with oligoastheneteratozoospermia - evaluation of Letrozole and Coenzyme Q10 supplementation on sperm parameter

2021 ◽  
Vol 36 (Supplement_1) ◽  
Author(s):  
D Se. Sharma
Keyword(s):  
Pregnancy Rate ◽  
Sperm Motility ◽  
Live Birth ◽  
Coenzyme Q10 ◽  
Birth Rate ◽  
Sperm Count ◽  
Live Birth Rate ◽  
Clinical Pregnancy ◽  
Clinical Pregnancy Rate ◽  
Male Factor

Abstract Study question Male infertility due to idiopathic oligoasthenoteratozoospermia- Does combining Letrozole as antiestrogenic with Coenzyme Q10 as antioxidant give better pregnancy rate ? Summary answer Combination of Co enzyme Q10 with Letrozole can significantly improve semen parameters and outcome of clinical pregnancy rate in idiopathic oligoasthenoteratozoospermic patients. What is known already Elevated levels of reactive oxygen species(ROS) are a major cause of idiopathic male factor infertility which results in sperm membrane lipid peroxidation, DNA damage and apoptosis leading to decrease sperm viability and motility. Antioxidant like Coenzyme Q10 have been used empiricallyin the treatment of oligoasthenozoospermia based on its ability to reverse oxidative stress and sperm dysfunction. Aromatase inhibitor like Letrozolehave been used in idiopathic male infertility by reducing estrogenic effect on spermatogenesis and reducing feedback inhibition of hypothalamopituatarygonadal axis. Thus a therapeutic strategy would need to use supplements to increase sperm energy metabilism, minimise free radical damage. Study design, size, duration Study design: prospective comperative clinical study Primary purpose: treatmenr Size: 60 infertile male attending OPD of SHRISTI HEALTHCARE diagnosed as idiopathic oligoasthenoteratozoospermia Duration: from March2018 to February 2020 Primary outcome: improvement in sperm count, motility and morphology after treatment Secondary outcome: clinical pregnancy rate and live birth rate. Participants/materials, setting, methods Exclusion criteria: Smoker, drug and alcohol abuse, medical treatment with gonadotropin and steroids, varicocele.60 patients were randomisedinto 3 groups. Gr A(N = 20) received Letrozole 2.5mg/day + Co enzyme Q10 300mg/day for 3 months, Gr B(N = 20) received Letrozole 2.5mg/day for 3 months, and Gr C(N = 20) received Coenzyme Q10 300mg/day for 3 months. History taking, general examination, semen analysis, sr.FSH,LH, Testesteron, E2 and scrotal duplex were done for all patients. Main results and the role of chance After treatment, Gr A as compared to Gr B and C showed significant imprivement in all 3 parameters of semen eg sperm count( 3.15±3.38 - 20.9±2.11, p < 0.001), sperm motility( 5.25±3.25 - 42.85±3.30, p < 0.001), sperm morphology( 2.26±7.81 - 25.89±7.05, p < 0.001). Improvement in sperm count and morphology was seen in Gr B(Letrozole gr) but not in sperm motility whereas Gr C ( Co enzyme Q10 gr)showed significant improvement in sperm motility and morphology but not in sperm count. 10 pregnancies occured during follow up period of 1 yr. Clinical pregnancy rate was 30%in Gr A(6/20), 5% in Gr B(1/20), AND 15% in Gr C( 3/20). Live birth rate was 83% in Gr A(5/6), 33.3% inGr C(1/3) whereas sponteneous abortion occured in Gr B pregnancy. Limitations, reasons for caution Limitation of my study was the small sample sizewhich could have some bias in outcome. I did not evaluate DNA fragmentation and level of ROS. Latest evidences report that evaluating ROS can be a diagnostic tool in predictingthe best responder to supplementation. Wider implications of the findings: Majority of studies had investigated the effect of antioxidant and aromatase inhibitor on semen parameter but few concluded their effect on live birth rate. Assisted reproductive techniques are expensive and not universally available, so any pharmacological agent with satisfactory effectiveness should be considered as 1st line treatment of oligoasthenoteratozoospermia. Trial registration number Not applicable

scholarly journals Observations on the oviposition of Blythia reticulata (Blyth, 1854) with new distributional records from Mizoram State, NE India

Herpetozoa ◽  
2020 ◽  
Vol 33 ◽  
pp. 53-57
Author(s):  
Lal Biakzuala ◽  
Hmar Tlawmte Lalremsanga ◽  
Hrahsel Laltlanchhuaha ◽  
Binoy Kumar Barman
Keyword(s):  
Reproductive Biology ◽  
Geographic Range ◽  
Egg Laying ◽  
Reproductive Season ◽  
Simultaneous Presence ◽  
New Information ◽  
Ne India ◽  
Multiple Matings ◽  
Second Clutch ◽  
New Distribution

The poorly known semi-fossorial snake Blythia reticulata is a small, oviparous, worm-eating species found in northeastern India and neighboring countries. Here we report on multiple new distribution localities that extend the known geographic range of the species. In addition, we provide new information on the reproductive biology of the species based on egg-laying behavior data from a captive gravid B. reticulata from Mizoram. The simultaneous presence of a second clutch of eight eggs in the oviduct of the female indicates the capacity of the species to exhibit multiple matings and egg clutches during a single reproductive season.

scholarly journals Identifying spawning activity in aquatic species based on environmental DNA spikes

2020 ◽  
Author(s):  
Satsuki Tsuji ◽  
Naoki Shibata
Keyword(s):  
Reproductive Biology ◽  
Field Survey ◽  
Aquatic Organisms ◽  
Environmental Dna ◽  
Reproductive Season ◽  
Aquatic Species ◽  
Spawning Activity ◽  
Invasive Approach ◽  
Non Invasive ◽  
Management Actions

AbstractAn understanding of the reproductive biology of aquatic organisms is crucial for the efficient conservation and management of species and/or populations. Nevertheless, conventional spawning surveys such as visual- and capture-based monitoring generally require laborious, time-consuming work and are subject to monitoring biases such as observer bias, as well as miscounts due to false spawning. In addition, direct capture often damages eggs or individuals. Thus, an efficient non-invasive approach for monitoring spawning activity on aquatic species would be a valuable tool to understand their reproductive biology and conserving biodiversity. Here, we proposed an environmental DNA (eDNA)-based approach for monitoring and understanding spawning activity by observing spikes in eDNA concentration after spawning activity. We found in cross experiments using two medaka species (Oryzias latipes and O. sakaizumii, 1:1 individual per tank) that an eDNA spike occurred in only male species after spawning activity. In addition, the magnitude of the eDNA spike was dependent on the number of spawning activities with egg and sperm release. In the field survey during the reproductive season, eDNA concentration after spawning were 3–25 times higher than before spawning. On the other hand, there was no increase in eDNA concentration during the non-reproductive season. Therefore, our results demonstrated that spikes in the eDNA concentration are mainly caused by the release of sperm during spawning activity, and it can be used as evidence of spawning in field survey. The presented approach could be a practical tool for studying reproductive biology and provides an opportunity to design effective conservation and environmental management actions.

Seasonal reproductive activity in the pterobranch hemichordate Rhabdopleura compacta

2008 ◽  
Vol 88 (5) ◽  
pp. 1033-1041 ◽  
Author(s):  
Atsuko Sato
Keyword(s):  
Sexual Reproduction ◽  
Reproductive Biology ◽  
Reproductive Activity ◽  
Anatomical Structure ◽  
Reproductive Season ◽  
Reproductive Status ◽  
South Coast ◽  
Phylogenetic Position ◽  
The South ◽  
Filter Feeders

Pterobranchs are small marine filter feeders in the phylum Hemichordata. Their phylogenetic position and anatomical structure has resulted in pterobranchs featuring in many scenarios concerning the evolution of chordates. Despite this interest, the basic reproductive biology of pterobranchs is still poorly known. To address this issue, the reproductive season of Rhabdopleura compacta was investigated by collecting specimens in 2004–2007 from a population growing on disarticulated bivalve shells off the south coast of Devon, UK. I analysed reproductive status by categorizing shells according to the condition of the colonies growing on them. The frequency of shells having mature females was almost constant from spring to autumn among shells with active colonies. However, it was apparent that: (a) shells having mature females were more likely to be incubating embryos or larvae in June and July than other months; and (b) the production of embryos was high in June, and then decreased by July. Thus, despite the previous speculation that the species is capable of successful sexual reproduction throughout the year, the present study shows seasonality in reproduction of R. compacta, with at least a peak season during summer.

Comparative structure and function of marsupial spermatozoa

1994 ◽  
Vol 6 (4) ◽  
pp. 421 ◽  
Author(s):  
PD Temple-Smith
Keyword(s):  
Sperm Motility ◽  
Comparative Studies ◽  
Current Knowledge ◽  
Structure And Function ◽  
Basic Organization ◽  
Nuclear Shaping ◽  
Comparative Structure ◽  
Nuclear Rotation ◽  
And Function ◽  
Posterior Ring

Marsupial sperm structure has been the focus of many comparative studies in the last 30 years. Although the basic organization of the marsupial spermatozoon is similar to that of eutherian mammals, spermatozoa from this branch of therian evolution have developed a specific suite of characters which clearly distinguish them from the Eutheria. This review surveys these specializations and examines current knowledge on their respective functions and the forces which shaped their evolution. Nuclear shaping and stability, the asymmetric positioning of the acrosome, and the unusual neck articulation are discussed. Although recent observations have provided evidence of a marsupial equatorial segment and posterior ring, the marsupial equivalent of the eutherian postacrosomal sheath has not been identified. The unusual neck structure of marsupial spermatozoa and the mobile articulation of the connecting piece are discussed in relation to nuclear rotation and the events associated with this process. Increasing flagellar length in some species is associated with extremes in flagellar organization and its effect on sperm motility is discussed.

scholarly journals Live Birth Rate After Transfer of Fresh or Frozen Poor Quality Day-3 Embryos Only

2019 ◽  
Vol 01 (04) ◽  
pp. 161-168
Author(s):  
Lan N. Vuong ◽  
Toan D. Pham ◽  
Bao G. Huynh ◽  
Quynh N. Nguyen ◽  
Tuong M. Ho ◽  
...  
Keyword(s):  
Live Birth ◽  
Birth Rate ◽  
Current Knowledge ◽  
Live Birth Rate ◽  
Poor Quality ◽  
Successful Outcome ◽  
Control Group ◽  
Vitro Fertilization ◽  
Day 3 Embryos

Background: Embryo quality is an important predictor of successful outcome in in vitro fertilization (IVF). However, current knowledge on the live birth rate after transfer of poor quality embryos is limited. This study investigated the live birth rate after transfer of only poor quality day-3 embryos in women undergoing IVF. Methods: This retrospective study included 153 couples who underwent IVF at IVFMD, My Duc Hospital, Ho Chi Minh City, Vietnam between June 2014 and January 2017 and had only poor quality day-3 embryos available for fresh (n [Formula: see text] 102) or frozen (n [Formula: see text] 51) transfer. The control group included patients who had transfer of one good embryo (n [Formula: see text] 64). Embryos were rated using the Istanbul criteria. Results: In the poor quality embryo group, the mean number of oocytes retrieved and number of embryos were 7.5 ± 4.4 and 1.8 ± 0.9, respectively. Mean number of embryos transferred was 1.6 ± 0.5 in the fresh transfer group and 2.0 ± 0.2 in the freeze-only group. Live births did occur after transfer of poor quality embryos, but the implantation, clinical pregnancy and live birth rates were significantly lower than after fresh or frozen transfer of a single good quality embryo (9.5 vs. 26.6%, p < 0.001; 13.7 vs. 26.6%, p < 0.001; and 7.2 vs. 18.8%, p [Formula: see text] 0.02, respectively). Conclusions: Live birth was achieved after transfer of only poor quality embryos in women undergoing IVF. This suggests that transfer of poor quality embryos could be an option when higher grade embryos are not available, after the chances of live birth have been discussed with the patient.

scholarly journals A Review of Current Knowledge of Zamiaceae, With Emphasis on Zamia From South America

2019 ◽  
Vol 12 ◽  
pp. 194008291987747 ◽  
Author(s):  
Rosane Segalla ◽  
Francismeire Jane Telles ◽  
Fábio Pinheiro ◽  
Patrícia Morellato
Keyword(s):  
South America ◽  
Reproductive Biology ◽  
Population Ecology ◽  
Current Knowledge ◽  
Pollen Dispersal ◽  
Ex Situ ◽  
Future Climate Change ◽  
Climate Change Scenarios ◽  
Ecological Interactions ◽  
Ex Situ Collections

Zamiaceae, a family of the ancient order Cycadales, is distributed throughout the tropical and subtropical regions of both the Old and New Worlds. Here, we present a systematic review of Zamiaceae with emphasis on Zamia species from South America. We aim to (a) establish the current knowledge, (b) identify research gaps, and (c) indicate directions for future studies, discussing ecology and conservation of South America species. The search recovered 508 papers, further classified into 11 research topics: taxonomy and systematics, morphology, biochemistry, genetics, phylogeography, population ecology, reproductive biology, ecological interactions, plant propagation, conservation, and reviews. The number of publications doubled in the 21st century, mostly focusing on genetics ( n = 60), taxonomy and systematics ( n = 52), morphology ( n = 36), ecological interactions ( n = 30), and an increasing interest in population ecology ( n = 29) and conservation ( n = 32). Studies are concentrated in North and Central America (54% of all studies) with just 6% (29) addressing South America species of Zamia. Overall, studies point out the key role of pollinators in promoting gene flow through pollen dispersal among populations of Zamiaceae. Therefore, investigate natural history, ecology, reproductive biology, genetic, and phylogeography, especially for South America species, are needed. Moreover, the implementation of in situ and ex situ collections and germplasm banks linked to botanical gardens are essential for the conservation and reestablishment of local populations of critically endangered Zamia species in South America. Concomitantly, we suggest studies modeling the distribution of Zamia species in future climate change scenarios.

scholarly journals Population structure and reproductive biology of the stone crab Xantho poressa (Crustacea: Decapoda: Xanthidae) in the ‘Corrales de Rota’ (south-western Spain), a human-modified intertidal fishing area

2009 ◽  
Vol 90 (2) ◽  
pp. 323-334 ◽  
Author(s):  
Eduardo D. Spivak ◽  
Elisabeth Arévalo ◽  
José A. Cuesta ◽  
J. Ignacio González-Gordillo
Keyword(s):  
Population Structure ◽  
Sex Ratio ◽  
Reproductive Biology ◽  
Gonadosomatic Index ◽  
Reproductive Season ◽  
Hepatosomatic Index ◽  
Stone Crab ◽  
Intertidal Crab ◽  
Western Spain ◽  
Complex Habitat

The present study describes the reproductive biology, population structure and life history traits of the abundant intertidal crab Xantho poressa. Between March 2007 and April 2008, a total of 1918 individuals were collected in Corrales de Rota (south-western Spain), a human-modified intertidal habitat characterized by an artificial high complexity. Suitable refuges for crabs (cobbles and boulders) are very abundant in this area and density (maximum of 50 ind*m−2) was directly related with the area covered by these stones. In spring and summer, size–frequency distributions showed a polymodal pattern with seasonal variations related to the incorporation of juveniles to the adult population. Newly settled juveniles were not found in the Corrales suggesting an ontogenetic migration from a distant recruitment habitat. The annual reproductive cycle was seasonal and successive peaks in the abundance of ovigerous females were observed in late spring and summer. Females probably produced multiple broods during a long intermoult period. The gonadosomatic index had a cyclic pattern of variation with peaks two weeks prior to those of ovigerous females; it was lower during the non-reproductive season. The hepatosomatic index was high during spring, decreased during summer and increased gradually at the end of the reproductive season. There was a monthly cycle of larval release resulting from a combination of a cyclic and synchronic ovarian maturity, oviposition and incubation; hatching took place during neap tides when the moon was at last quarter. The adaptive significance of the rhythmic reproduction and hatching observed may not be explained by the predator avoidance hypotheses. The overall sex-ratio did not differ from 1:1 but one male and several females coexist under a stone, indicating a female biased operative sex-ratio. The combination of a complex habitat, its use, and a strong sexual dimorphism suggest a refuge–defence polygenic mating system. The survival and fitness of X. poressa in the Corrales de Rota are probably enhanced by the availability of shelter, a consequence of a highly complex habitat, and probably, of human activity.

Living in a tiny world: reproductive biology and population ecology of the Neotropical miniature frog Euparkerella aff. brasiliensis (Terraranae, Strabomantidae)

2020 ◽  
Vol 41 (2) ◽  
pp. 201-213
Author(s):  
Luciana Ardenghi Fusinatto ◽  
Bruno Lamy T. Diniz ◽  
Andreza Soares de Siqueira ◽  
Monique Van Sluys ◽  
Fernando Sequeira ◽  
...  
Keyword(s):  
Sex Ratio ◽  
Reproductive Biology ◽  
Population Ecology ◽  
Sexual Size Dimorphism ◽  
Current Knowledge ◽  
Evolutionary Trend ◽  
Ecological Studies ◽  
Future Directions ◽  
Reproductive Females ◽  
Reproductive Cycles

Abstract Miniaturisation is an important evolutionary trend for amphibians and has occurred several times in independent anuran lineages. Most miniaturised frogs live in the leaf litter of tropical forests and have terrestrial reproductive modes. They are expected to have reduced fecundity in number of eggs than larger-bodied related species, but little is known about reproductive cycles and proportion of reproductive females. Lower vagility is also assumed, however, as they are difficult to observe, there is little empirical evidence about their dispersal. We studied the reproductive biology (sex ratio, sexual size dimorphism and fecundity parameters) and population ecology (growth, dispersal, and phenology) of the miniature Guanabara Frog Euparkerella aff. brasiliensis (⩽ 20 mm). We collected and analysed 75 specimens of E. aff. brasiliensis, of which 27 were adult females with vitellogenic oocytes in their ovaries. Fecundity was low for number of eggs (average number = 9.7), but only one adult female had no vitellogenic oocytes. Sex ratio was relatively balanced among sexes, being female-biased (0.92) for all individuals and male-biased (1.17) for adults. Juveniles and ovigerous females were observed throughout the year during the two years of mark-recapture study, which indicates continuous breeding. We captured 121 individuals, of which 12% were recaptured in their original collection sites, suggesting low vagility. We discuss our findings considering the current knowledge about the ecology of miniaturised frogs and other Terraranae and suggest future directions for ecological studies and conservation planning.

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