نتایج جستجو برای: jellyfish
تعداد نتایج: 2096 فیلتر نتایج به سال:
Background: Collagen is a protein that constitutes a major component of connective tissue and has many applications in the medical and non-medical fields. The increase in the world population and the need for proteins have led to a special focus on seafood. Furthermore, jellyfish is a rich and renewable source of collagen. Therefore, many researchers have shown interest in collagen extraction f...
Jellyfish form spectacular blooms throughout the world's oceans. Jellyfish body plans are characterised by high water and low carbon contents which enables them to grow much larger than non-gelatinous animals of equivalent carbon content and to deviate from non-gelatinous pelagic animals when incorporated into allometric relationships. Jellyfish have, however, been argued to conform to allometr...
A perceived recent increase in global jellyfish abundance has been portrayed as a symptom of degraded oceans. This perception is based primarily on a few case studies and anecdotal evidence, but a formal analysis of global temporal trends in jellyfish populations has been missing. Here, we analyze all available long-term datasets on changes in jellyfish abundance across multiple coastal station...
Jellyfish disruption of fisheries has been described in some coastal systems, but few thorough investigations have been conducted. To ascertain the economic impact and trend of jellyfish blooms in the Northern California Current (NCC), we mailed surveys to resident commercial shrimpers, salmon trollers, rockfish (blue, black), and groundfish fishers (n 1⁄4 872). We asked fishers to estimate the...
High levels of jellyfish biomass have been reported in marine ecosystems around the world, but understanding of their ecological role remains in its infancy. Jellyfish are generally thought to have indirect negative impacts on higher trophic-level predators, through changes in lower trophic pathways. However, high densities of jellyfish in the water column may affect the foraging behaviour of m...
Jellyfish species are widely distributed in the world's oceans, and their population is rapidly increasing. Jellyfish extracts have several biological functions, such as cytotoxic, anti-microbial, and antioxidant activities in cells and organisms. However, the anti-cancer effect of Jellyfish extract has not yet been examined. We used chronic myelogenous leukemia K562 cells to evaluate the mecha...
Jellyfish outbreaks and their consequences appear to be on the increase around the world, and are becoming particularly relevant in the Mediterranean. No previous studies have quantified tourism losses caused by jellyfish outbreaks. We used a stated-choice questionnaire and a Random Utility Model to estimate the amount of time respondents would be willing to add to their journey, in terms of re...
of Proposed Work (250 words or less): The Bering Sea shelf has experienced significant climatic changes over the past 30 years. During this period of intense physical variation, dramatic and unexpected changes have taken place in the southeastern Bering Sea ecosystem, including large fluctuations in jellyfish biomass. To explore to effects of climate change on jellyfish populations, we will use...
Localized outbreaks of jellyfish, known as blooms, cause a variety of adverse ecological and economic effects. However, fundamental aspects of their ecology remain unknown. Notably, there is scant information on the role jellyfish occupy in food webs: in many ecosystems, few or no predators are known. To identify jellyfish consumers in the Irish Sea, we conducted a molecular gut content assessm...
Citation: Sweetman AK and Chapman A (2015) First assessment of flux rates of jellyfish carcasses (jelly-falls) to the benthos reveals the importance of gelatinous material for biological C-cycling in jellyfish-dominated ecosystems. Front. Mar. Sci. 2:47. doi: 10.3389/fmars.2015.00047 First assessment of flux rates of jellyfish carcasses (jelly-falls) to the benthos reveals the importance of gel...
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