scholarly journals Reproductive and energetic costs of injury in the mangrove tree crab

2020 ◽  
Vol 640 ◽  
pp. 127-137
Author(s):  
BD Griffen ◽  
ZJ Cannizzo ◽  
J Carver ◽  
M Meidell

Nonlethal injury is a common and ubiquitous feature of marine systems and can result in altered growth and survival rates. Ecological theory predicts that injured animals should face an energetic tradeoff between investing in recovery vs. investing in reproduction. Possible impacts on reproduction may range in magnitude from very strong (elimination of reproduction), to intermediate (reduced number of offspring), to weak (reduced investment in each offspring). While this tradeoff is well established in terrestrial systems, it has received little attention in the marine environment, particularly in a way that quantitatively relates the degree of injury to the degree of reproductive impact. We examined injury via limb loss across 4 sites in the mangrove tree crab Aratus pisonii. We found that limb loss was highest at the site that was closest to roads and had the highest level of human presence, and conversely, injury was lowest at the site furthest from the road and with the lowest level of human presence. We found evidence that the quality of consumed food likely decreases with the number of limbs lost, but found no influence of limb loss on amount of food consumed or on energy storage. We show that limb loss reduced the number of eggs produced and that the mass of the ovary declined with the number of regenerating limbs, providing direct evidence for a tradeoff between reproduction and injury recovery. Further, our study therefore suggests that these impacts may increase with the level of human disturbance.

2020 ◽  
Vol 10 (4) ◽  
pp. 237
Author(s):  
Ana Rita Simões ◽  
Ceres Fernández-Rozadilla ◽  
Olalla Maroñas ◽  
Ángel Carracedo

In recent decades, survival rates in colorectal cancer have improved greatly due to pharmacological treatment. However, many patients end up developing adverse drug reactions that can be severe or even life threatening, and that affect their quality of life. These remain a limitation, as they may force dose reduction or treatment discontinuation, diminishing treatment efficacy. From candidate gene approaches to genome-wide analysis, pharmacogenomic knowledge has advanced greatly, yet there is still huge and unexploited potential in the use of novel technologies such as next-generation sequencing strategies. This review summarises the road of colorectal cancer pharmacogenomics so far, presents considerations and directions to be taken for further works and discusses the path towards implementation into clinical practice.


1994 ◽  
Vol 33 (05) ◽  
pp. 206-214 ◽  
Author(s):  
J. Triller ◽  
H. U. Baer ◽  
Livia Geiger ◽  
H. F. Beer ◽  
C. Becker ◽  
...  

SummaryTwenty patients with unresectable hepatocellular carcinoma (HCC) were followed up to 5 years after transarterial radiotherapy with 90Y-resin particles. Diagnostic radioembolizations of 99mTc-macroaggregates facilitated scintigraphic assessment of activity distribution, dose evaluation and final procedural verification. The overall survival rates were 56, 38 and 14% (after 1, 2 and 3 years, resp.). Patients with unifocal HCC and a single feeding artery (n = 7) even presented 83, 67 and 40% (2 alive after 2.75 and 4 years). With multiple arteries (n = 7), the longest survival was 26 months. Patients with multifocal HCC survived up to 33 months after selective radioembolization. Quality of life was improved in all. Survival was positively correlated with absorbed dose but residual/recurrent tumour occurred even after ≥300 Gy. Post-treatment symptoms were minimal (35 applications), pulmonary shunt rates were correctly predicted and pulmonary complications avoided.


2019 ◽  
Vol 2 (5) ◽  
Author(s):  
Tong Wang

The compaction quality of the subgrade is directly related to the service life of the road. Effective control of the subgrade construction process is the key to ensuring the compaction quality of the subgrade. Therefore, real-time, comprehensive, rapid and accurate prediction of construction compaction quality through informatization detection method is an important guarantee for speeding up construction progress and ensuring subgrade compaction quality. Based on the function of the system, this paper puts forward the principle of system development and the development mode used in system development, and displays the development system in real-time to achieve the whole process control of subgrade construction quality.


2020 ◽  
Vol 7 (1) ◽  
pp. 99
Author(s):  
Yong Adilah Shamsul Harumain ◽  
Nur Farhana Azmi ◽  
Suhaini Yusoff

Transit stations are generally well known as nodes of spaces where percentage of people walking are relatively high. The issue is do more planning is actually given to create walkability. Creating walking led transit stations involves planning of walking distance, providing facilities like pathways, toilets, seating and lighting. On the other hand, creating walking led transit station for women uncover a new epitome. Walking becomes one of the most important forms of mobility for women in developing countries nowadays. Encouraging women to use public transportation is not just about another effort to promote the use of public transportation but also another great endeavour to reduce numbers of traffic on the road. This also means, creating an effort to control accidents rate, reducing carbon emission, improving health and eventually, developing the quality of life. Hence, in this paper, we sought first to find out the factors that motivate women to walk at transit stations in Malaysia. A questionnaire survey with 562 female user of Light Railway Transit (LRT) was conducted at LRT stations along Kelana Jaya Line. Both built and non-built environment characteristics, particularly distance, safety and facilities were found as factors that are consistently associated with women walkability. With these findings, the paper highlights the criteria  which are needed to create and make betterment of transit stations not just for women but also for walkability in general.


2018 ◽  
pp. 10-20
Author(s):  
Н.А. Глотов ◽  
Н.Е. Соколов ◽  
Ю.Б. Смоляков

Представлены результаты внедрения в хирургическую практику урологического отделения Дорожной клинической больницы г. Ярославль биполярной техники трансуретральной резекции (БТУР) и энуклеации простаты (ТУЭБ) для лечения доброкачественной гиперплазии предстательной железы (ДГПЖ) средних и больших размеров. В сравнительное исследование включено 164 пациента, разделенных по методам операции на 2 основные группы (ТУЭБ - 33 человека, БТУР - 49) и 2 контрольные (открытая простатэктомия - ОПЭ - 38 и монополярная ТУР - 44). Для новых эндоскопических методов установлено значимое снижение объема кровопотери, частоты геморрагических осложнений, сроков послеоперационной катетеризации и госпитализации. Для количественной оценки различий средних и относительных показателей использо-вали непараметрический критерий Манна-Уитни, оценка качественных признаков проводилась с применением критерия Пирсона (χ2), уровень значимости различий для исследования выбран р ≤ 0,05. Анализ послеоперационной динамики клинических показателей в среднесрочной перспективе показал сходную радикальность и эффектив-ность сравниваемых методов. Установленные меньшая инвазивность, большая безопасность и лучшая переносимость биполярных эндоскопических операций демонстрируют перспективность их внедрения взамен бывших стандартных хирургических методов, что позволит повысить качество оперативного лечения и сократить затраты стационара. The results of the introduction into surgical practice of the urological Department of the road clinical hospital of Yaroslavl bipolar technique of transurethral resection (BTTR) and enucleation of the prostate (EOTP) for the treatment of benign prostatic hyperplasia (BPH) of medium and large sizes are presented. The comparative study included 164 patients, divided by the methods of surgery into 2 main groups (EOTP - 33 people, BTTR - 49) and 2 control (open prostatectomy - OPE - 38 and monopolar TTR - 44). For new endoscopic methods, a significant reduction in the volume of blood loss, the frequency of hemorrhagic complications, the timing of postoperative catheterization and hospitalization was established. Nonparametric Mann-Whitney test was used to quantify the differences in mean and relative indicators, qualitative characteristics were evaluated using Pearson test (χ2), the significance level of the differences for the study was chosen p ≤ 0.05. Analysis of postoperative dynamics of clinical parameters in the medium term showed similar radicality and effectiveness of the compared methods. The lower invasiveness, greater safety and better tolerability of bipolar endoscopic operations demonstrate the prospects of their implementation instead of the former standard surgical methods, which will improve the quality of surgical treatment and reduce the costs of the hospital.


2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jade Carver ◽  
Morgan Meidell ◽  
Zachary J. Cannizzo ◽  
Blaine D. Griffen

AbstractTwo common strategies organisms use to finance reproduction are capital breeding (using energy stored prior to reproduction) and income breeding (using energy gathered during the reproductive period). Understanding which of these two strategies a species uses can help in predicting its population dynamics and how it will respond to environmental change. Brachyuran crabs have historically been considered capital breeders as a group, but recent evidence has challenged this assumption. Here, we focus on the mangrove tree crab, Aratus pisonii, and examine its breeding strategy on the Atlantic Florida coast. We collected crabs during and after their breeding season (March–October) and dissected them to discern how energy was stored and utilized for reproduction. We found patterns of reproduction and energy storage that are consistent with both the use of stored energy (capital) and energy acquired (income) during the breeding season. We also found that energy acquisition and storage patterns that supported reproduction were influenced by unequal tidal patterns associated with the syzygy tide inequality cycle. Contrary to previous assumptions for crabs, we suggest that species of crab that produce multiple clutches of eggs during long breeding seasons (many tropical and subtropical species) may commonly use income breeding strategies.


2020 ◽  
Vol 4 (Supplement_1) ◽  
pp. 96-96
Author(s):  
Victoria Raveis ◽  
Simona Kwon

Abstract Women have a 1-in-8 lifetime risk of breast cancer. Earlier diagnosis and treatment advances have improved 15- and 20-year survival rates. Increased survival can mean coping with the effects of cancer and its treatment over an extended period of time, while experiencing age-related changes in functioning and the emergence of other health issues. To explore breast cancer survivors’ perspectives on their issues and concerns across the life-course, focus groups were conducted with a culturally diverse sample (N=18) of survivors (72% white, 28% Black, 11% Hispanic). Participants were 44-82 years old. Most, 83% were 50 and older, 56% were 60 and older. The majority (83%) were diagnosed in their 40’s and 50’s. Two were diagnosed in their early 30’s and one at age 68. Participants reaffirmed the necessity, as a breast cancer survivor, of being a life-long health advocate on their own behalf, and the importance of being self-informed. As one woman commented: “Knowledge is power”. Survivors shared that their emergent health issues were complicated by their cancer history, and, that, as a cancer survivor, “I never stop worrying”. A widespread concern was not knowing if the health issues and co-morbidities they experienced (such as joint pain, neuropathy, tendinitis, heart disease), were age-related, a consequence of their cancer, or a late treatment effect. An overriding sentiment expressed was that clinicians have not recognized the importance of quality of life in cancer survival. As a survivor succinctly stated: “We are living longer, but we need to live long with quality of life.”


2020 ◽  
Vol 22 (Supplement_3) ◽  
pp. iii317-iii317
Author(s):  
Eileen Gillan

Abstract Recurrent ependymomas have a dismal prognosis (2 year survival rates 29% OS and 23% EFS) and are relatively resistant to conventional chemotherapy. We previously reported five relapsed ependymoma patients treated with a MEMMAT based metronomic antiangiogenic combination therapy. All patients are currently alive, including four patients who were multiply relapsed with at least three recurrences. These four patients received between 44–52 weeks of therapy with minimal toxicity. Three had recurrent disease within an average of 44 months (median 42 months) after discontinuation of therapy. One patient who received the following tapering bevacizumab schedule: q3 weeks x 3, q4 weeks x 4 and q5 weeks x 5 followed by maintenance therapy with fenofibrate and celecoxib is in complete remission 12 months post treatment. This regimen was well tolerated with good quality of life in this patient population. Our results suggest that the chosen anti-angiogenic drug combination prolonged the time to progression in these multiply relapsed patients and thus may be particularly beneficial for patients with recurrent ependymoma. Tapered bevacizumab and maintenance therapy with celecoxib and fenofibrate may be modifications worth further investigation for prolonged disease free survival in relapsed ependymoma patients.


Author(s):  
Dianne Hartgerink ◽  
Anna Bruynzeel ◽  
Danielle Eekers ◽  
Ans Swinnen ◽  
Coen Hurkmans ◽  
...  

Abstract Background The clinical value of whole brain radiotherapy (WBRT) for brain metastases (BM) is a matter of debate due to the significant side effects involved. Stereotactic radiosurgery (SRS) is an attractive alternative treatment option that may avoid these side effects and improve local tumor control. We initiated a randomized trial (NCT02353000) to investigate whether quality of life is better preserved after SRS compared with WBRT in patients with multiple brain metastases. Methods Patients with 4 to 10 BM were randomized between the standard arm WBRT (total dose 20 Gy in 5 fractions) or SRS (single fraction or 3 fractions). The primary endpoint was the difference in quality of life (QOL) at three months post-treatment. Results The study was prematurely closed due to poor accrual. A total of 29 patients (13%) were randomized, of which 15 patients have been treated with SRS and 14 patients with WBRT. The median number of lesions were 6 (range, 4-9) and the median total treatment volume was 13.0 cc 3 (range, 1.8-25.9 cc 3). QOL at three months decreased in the SRS group by 0.1 (SD=0.2), compared to 0.2 (SD=0.2) in the WBRT group (p=0.23). The actuarial one-year survival rates were 57% (SRS) and 31% (WBRT) (p=0.52). The actuarial one-year brain salvage-free survival rates were 50% (SRS) and 78% (WBRT) (p=0.22). Conclusion In patients with 4 to 10 BM, SRS alone resulted in one-year survival for 57% of patients while maintaining quality of life. Due to the premature closure of the trial, no statistically significant differences could be determined.


2010 ◽  
Vol 5 (1-2) ◽  
pp. 91-99 ◽  
Author(s):  
Shigeyuki Muraki ◽  
Toru Akune ◽  
Hiroyuki Oka ◽  
Yoshio En-yo ◽  
Munehito Yoshida ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document