ULTIMO AGGIORNAMENTO BANCA DATI: 13/09/2024 13:00:57
Genetic variation within populations depends on population size, spatial structuring, and environmental variation, but is also influenced by mating system. Mangroves are some of the most productive and threatened ecosystems on earth and harbor a large proportion of species with mixed-mating (self-fertilization ...
Predation can cause morphological divergence among populations, while ontogeny and sex often determine much of morphological diversity among individuals. We used geometric morphometrics to characterize body shape in the livebearing fish Brachyrhaphis rhabdophora to test for interactions between these ...
Anthropogenic activities frequently result in both rapidly changing environments and translocation of species from their native ranges (i.e., biological invasions). Empirical studies suggest that many factors associated with these changes can lead to complex genetic patterns, particularly among invasive ...
It is well established that reproduction is sensitive to the state of energy reserves, and that there is a balance between energy homeostasis and fertility. In this view, this study examined the effects of different diets on growth and reproductive performance of fresh water angelfish. Twenty four pairs ...
Fishing technology is important to enhance the competitiveness of Indonesian fishermen. Lack of research on the development of fishing equipment technology causes quantity stagnation. It also forces the fishermen to use hazardous equipment. Lobster is a commodity with superior characteristic and a high ...
Harvesting wild populations may contrast or reinforce natural agents of selection and potentially cause evolutionary changes in life-history traits such as growth and maturation. Harvest selection may also act on behavioral traits, although this field of research has so far received less attention. ...
The tuna fisheries in the Gulf of Guinea provides huge economic benefits through fish trade and food security. The region, an important spawning site and migratory path for three dominant tuna species i.e. Skipjack (Katsuwonus pelamis), Yellowfin (Thunnus albacares) and Bigeye (Thunnus obesus), has ...
This paper presents a novel image processing algorithm to measure the length and depth of an epidural needle during insertion. A wireless camera is used which transmits video during insertion to a host computer. The computer contains the image processing algorithm to detect the visible needle in the ...
This paper analyzed the potential implementation of renewable hybrid wind/diesel energy system in Pemanggil Island, Malaysia. National Renewable Energy Laboratory's (NREL) HOMER software was used to perform the techno economic feasibility of hybrid wind/diesel energy system. The investigation demonstrated ...
We present a sliding mode based strategy for navigation of a unicycle-like robot to the target through a dynamic environment cluttered with moving and deforming obstacles. The proposed strategy is based on properly switching between moves to the target in straight lines and sliding-mode based bypasses ...
A fundamental question in ecology is whether microorganisms follow the same patterns as multicellular organisms when it comes to population structure and levels of genetic diversity. Enormous population sizes, predominately asexual reproduction and presumably high dispersal because of small body size ...
Aiming directly at addressing the contradition between fishing-boat weather report machines' shortcomings and the request for timely and exact weather report. This thesis poses a weather report machines' program which bases on the GPRS. The program mainly researches the key technology of meteorological ...
In this paper, emergy analysis method is used to evaluate the performance and development of agriculture in Tarim River Basin for the period from 1988 to 2008. The results showed that the total and purchased emergy inputs were increasing steadily, and agriculture system depended on non-renewable heavily ...
Appropriate values for information resources and services need to be evaluated before these values and information resources are exchanged to circulate the information resources more smoothly. A local currency is suitable for financial settlement among members of a community. As previous studies treated ...
In January 2011, a trout farm manager in Kentucky lost his life when he became entangled in a power-take-off connected to a posthole digger ("Green County man," 2011). He was constructing a fence on the farm. Later, in May 2011, an experienced diver drowned while tending fish cages offshore under about ...
Temporary water bodies are important freshwater habitats in the arid zone of Australia. They harbor a distinct fauna and provide important feeding and breeding grounds for water birds. This paper assesses, on the basis of haplotype networks, analyses of molecular variation and relaxed molecular clock ...
Population density is an ecological variable that is hypothesized to be a major agent of selection on offspring size. In high-density populations, high levels of intraspecific competition are expected to favor the production of larger offspring. In contrast, lower levels of intraspecific competition ...
Coastal upwelling is a wind-driven ocean process. It brings cooler, saltier, and usually nutrient-rich deep water upward to replace surface water displaced offshore due to Ekman transport. The nutrients carried up by upwelling are important for primary production and fisheries. Ocean life can aggregate ...
Nonlinear acoustics allows for applications like tissue harmonic imaging in medicine and parametric arrays in underwater acoustics. Mainstream sonars transmit and receive signals at the same frequency and up to now energy transferred to higher harmonic frequencies has been mainly seen as a disturbance ...
Synthetic Aperture Radar systems are powerful observation tools for maritime surveillance applications such as fisheries monitoring or pirates detection and oil slick detection. It is an important problem that has not been completely solved. The Demonstrator of Maritime SAR Applications (DeMSAR) is ...