scholarly journals Plausible causes for sperm-store variations in the coconut crab Birgus latro under large male‑selective harvesting

2011 ◽  
Vol 13 (1) ◽  
pp. 11-19 ◽  
Author(s):  
T Sato
Keyword(s):  
Large Male ◽  
Selective Harvesting ◽  
Sperm Store

scholarly journals Sperm limitation: possible impacts of large male-selective harvesting on reproduction of the coconut crab Birgus latro

2010 ◽  
Vol 10 (1) ◽  
pp. 23-32 ◽  
Author(s):  
T Sato ◽  
K Yoseda ◽  
K Okuzawa ◽  
N Suzuki
Keyword(s):  
Large Male ◽  
Sperm Limitation ◽  
Selective Harvesting

scholarly journals Selective Harvesting Robotics: Current Research, Trends, and Future Directions

2021 ◽  
Author(s):  
Gert Kootstra ◽  
Xin Wang ◽  
Pieter M. Blok ◽  
Jochen Hemming ◽  
Eldert van Henten
Keyword(s):  
Review Paper ◽  
Production Systems ◽  
Future Research ◽  
Limiting Factor ◽  
Future Directions ◽  
Research Directions ◽  
Selective Harvesting ◽  
Important Solution ◽  
Future Research Directions ◽  
Current Systems

Abstract Purpose of Review The world-wide demand for agricultural products is rapidly growing. However, despite the growing population, labor shortage becomes a limiting factor for agricultural production. Further automation of agriculture is an important solution to tackle these challenges. Recent Findings Selective harvesting of high-value crops, such as apples, tomatoes, and broccoli, is currently mainly performed by humans, rendering it one of the most labor-intensive and expensive agricultural tasks. This explains the large interest in the development of selective harvesting robots. Selective harvesting, however, is a challenging task for a robot, due to the high levels of variation and incomplete information, as well as safety. Summary This review paper provides an overview of the state of the art in selective harvesting robotics in three different production systems; greenhouse, orchard, and open field. The limitations of current systems are discussed, and future research directions are proposed.

scholarly journals Body size, sex and high philopatry influence the use of agricultural land by Galapagos giant tortoises

Oryx ◽  
2021 ◽  
pp. 1-10
Author(s):  
Kyana N. Pike ◽  
Stephen Blake ◽  
Freddy Cabrera ◽  
Iain J. Gordon ◽  
Lin Schwarzkopf
Keyword(s):  
National Park ◽  
Agricultural Land ◽  
Large Male ◽  
Gps Data ◽  
Santa Cruz Island ◽  
Santa Cruz ◽  
Agricultural Areas ◽  
On Farm ◽  
Human Wildlife Conflict ◽  
Privately Owned

Abstract As agricultural areas expand, interactions between wild animals and farmland are increasing. Understanding the nature of such interactions is vital to inform the management of human–wildlife coexistence. We investigated patterns of space use of two Critically Endangered Galapagos tortoise species, Chelonoidis porteri and Chelonoidis donfaustoi, on privately owned and agricultural land (hereafter farms) on Santa Cruz Island, where a human–wildlife conflict is emerging. We used GPS data from 45 tortoises tracked for up to 9 years, and data on farm characteristics, to identify factors that influence tortoise movement and habitat use in the agricultural zone. Sixty-nine per cent of tagged tortoises used the agricultural zone, where they remained for a mean of 150 days before returning to the national park. Large male tortoises were more likely to use farms for longer periods than female and smaller individuals. Tortoises were philopatric (mean overlap of farmland visits = 88.7 ± SE 2.9%), on average visiting four farms and occupying a mean seasonal range of 2.9 ± SE 0.3 ha. We discuss the characteristics of farm use by tortoises, and its implications for tortoise conservation and coexistence with people.

Effect of Vehicle's Front End Profile on Pedestrian's Lower Extremity Injury Pattern in Real World and Verification by Large Male FE Human Model

2015 ◽  
Author(s):  
Chinmoy Pal ◽  
Tomosaburo Okabe ◽  
Kulothungan Vimalathithan ◽  
Jeyabharath Manoharan ◽  
Munenori Shinada
Keyword(s):  
Lower Extremity ◽  
Real World ◽  
Large Male ◽  
Injury Pattern ◽  
Lower Extremity Injury ◽  
Human Model ◽  
Extremity Injury ◽  
Front End

Dynamics and drivers of aboveground biomass accumulation during recovery from selective harvesting in an uneven-aged forest

2021 ◽  
Author(s):  
Yan Geng ◽  
Qingmin Yue ◽  
Chunyu Zhang ◽  
Xiuhai Zhao ◽  
Klaus von Gadow
Keyword(s):  
Aboveground Biomass ◽  
Biomass Accumulation ◽  
Selective Harvesting

scholarly journals Size-at-maturity shift in a male-only fishery: factors affecting molt-type outcomes in Newfoundland and Labrador snow crab (Chionoecetes opilio)

2020 ◽  
Author(s):  
Darrell R J Mullowney ◽  
Krista D Baker
Keyword(s):  
Population Density ◽  
Newfoundland And Labrador ◽  
Cold Water ◽  
Large Male ◽  
Snow Crab ◽  
Size At Maturity ◽  
Chionoecetes Opilio ◽  
Factors Affecting ◽  
Male Density ◽  
Process Factors

Abstract A sex-asymmetric downward shift in size-at-terminal-molt has recently occurred in males in some portions of the Newfoundland and Labrador (NL) snow crab stock range, a first known occurrence for such processes in snow crab (Chionoecetes opilio) stocks. This study examines plausible factors promoting the shift in size-at-terminal-molt [synonymous with size-at-maturity (SaM)] including individual size, temperature, population density, and sex ratio. Analyses highlight expanse of cold water and large male density as being significant predictors of molt-type outcomes. A confluence of cold conditions and low density of large males promoted the SaM shift. In turn, the low male density was associated with recently elevated fishery exploitation rates under quota-controlled management. It remains unknown the extent to which the reduction in terminal size reflects a phenotypic vs. genotypic process. Factors affecting skip-molting in male snow crab are investigated, and we find that skip-molting occurs most frequently under extreme cold and high population density conditions. Potential complications arising from altered growth dynamics are discussed. Overall, the results advance knowledge on intraspecific competition processes within snow crab populations and inform fisheries management systems that male-only harvest strategies do not provide full protection from biological harm to aquatic resources through fishing.

scholarly journals Ultraviolet and Near‐Infrared Dual‐Band Selective‐Harvesting Transparent Luminescent Solar Concentrators

2021 ◽  
Vol 11 (12) ◽  
pp. 2003581
Author(s):  
Chenchen Yang ◽  
Wei Sheng ◽  
Mehdi Moemeni ◽  
Matthew Bates ◽  
Christopher K. Herrera ◽  
...  
Keyword(s):  
Near Infrared ◽  
Dual Band ◽  
Solar Concentrators ◽  
Selective Harvesting ◽  
Luminescent Solar Concentrators

scholarly journals Health problems awareness during travel among faculty members of a large university in Latin America: preliminary report

2013 ◽  
Vol 55 (1) ◽  
pp. 55-59 ◽  
Author(s):  
Ana Cristina Nakamura Tome ◽  
Thaís Brandi Canello ◽  
Expedito José de Albuquerque Luna ◽  
Heitor Franco de Andrade Junior
Keyword(s):  
Health Insurance ◽  
Respiratory Infections ◽  
Insurance Coverage ◽  
Age Groups ◽  
Field Research ◽  
Health Problems ◽  
Large Male ◽  
Faculty Members ◽  
Health Counseling ◽  
Health Safety

Health safety during trips is based on previous counseling, vaccination and prevention of infections, previous diseases or specific problems related to the destination. Our aim was to assess two aspects, incidence of health problems related to travel and the traveler's awareness of health safety. To this end we phone-interviewed faculty members of a large public University, randomly selected from humanities, engineering and health schools. Out of 520 attempts, we were able to contact 67 (12.9%) and 46 (68.6%) agreed to participate in the study. There was a large male proportion (37/44, 84.1%), mature adults mostly in their forties and fifties (32/44, 72.7%), all of them with higher education, as you would expect of faculty members. Most described themselves as being sedentary or as taking occasional exercise, with only 15.9% (7/44) taking regular exercise. Preexisting diseases were reported by 15 travelers. Most trips lasted usually one week or less. Duration of the travel was related to the destination, with (12h) or longer trips being taken by 68.2% (30/44) of travelers, and the others taking shorter (3h) domestic trips. Most travelling was made by air (41/44) and only 31.8% (14/44) of the trips were motivated by leisure. Field research trips were not reported. Specific health counseling previous to travel was reported only by two (4.5%). Twenty seven of them (61.4%) reported updated immunization, but 11/30 reported unchecked immunizations. 30% (9/30) reported travel without any health insurance coverage. As a whole group, 6 (13.6%) travelers reported at least one health problem attributed to the trip. All of them were males travelling abroad. Five presented respiratory infections, such as influenza and common cold, one neurological, one orthopedic, one social and one hypertension. There were no gender differences regarding age groups, destination, type of transport, previous health counseling, leisure travel motivation or pre-existing diseases. Interestingly, the two cases of previous health counseling were made by domestic travelers. Our data clearly shows that despite a significant number of travel related health problems, these highly educated faculty members, had a low awareness of those risks, and a significant number of travels are made without prior counseling or health insurance. A counseling program conducted by a tourism and health professional must be implemented for faculty members in order to increase the awareness of travel related health problems.

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