scholarly journals THE PRIMARY METABOLITES OF SARDINE (SARDINA PILCHARDUS) IN THE MOROCCAN NORTH ATLANTIC

2020 ◽  
Vol 8 (9) ◽  
pp. 1361-1369
Author(s):  
Wahbi Abderrazik ◽  
◽  
Seddik Nadia ◽  
Hmimid Fouzia ◽  
Schahrakane Yassine ◽  
...  
Keyword(s):  
North Atlantic ◽  
Abiotic Factors ◽  
Sardina Pilchardus ◽  
Primary Metabolites ◽  
Carbohydrate Reserves ◽  
Biotic And Abiotic Factors ◽  
Hydrological Parameters ◽  
Different Seasons ◽  
And Storage

Primary metabolites were determined in muscle, liver and gonads in sardines (Sardina pilchardus) captured in the Moroccan North Atlantic.It emerges from this study that in sardines, in the different seasons of the year, the lipid, protein and carbohydrate reserves are stored in the different organs. This important storage of metabolites in the gonads will undoubtedly be used for maturation while the reserves stored in muscle and liver will be used for the production of energy necessary for catadromous migration.In addition, there are other biotic and abiotic factors that influence the use and storage of these metabolites such as the quality and quantity of foods and hydrological parameters.

Fumonisin-Producing Strains of Fusarium: A Review of Their Ecophysiology

2004 ◽  
Vol 67 (8) ◽  
pp. 1792-1805 ◽  
Author(s):  
SONIA MARÍN ◽  
NARESH MAGAN ◽  
ANTONIO J. RAMOS ◽  
VICENTE SANCHIS
Keyword(s):  
Abiotic Factors ◽  
Fusarium Species ◽  
Fusarium Verticillioides ◽  
Fumonisin B1 ◽  
Storage Conditions ◽  
Fusarium Proliferatum ◽  
Biotic And Abiotic Factors ◽  
And Storage

This review focuses on the fumonisin-producing Fusarium species and the ecophysiology of these species. The effects of environmental biotic and abiotic factors on germination, growth, and fumonisin B1 production by Fusarium verticillioides and Fusarium proliferatum have been investigated under laboratory, field, and storage conditions. An understanding of the factors involved in production of fumonisins is the first step in preventing accumulation of these toxins.

scholarly journals Flow cytometric measurements as a proxy for sporulation intensity in the cultured macroalga Ulva (Chlorophyta)

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Omri Nahor ◽  
Cristina F. Morales-Reyes ◽  
Gianmaria Califano ◽  
Thomas Wichard ◽  
Alexander Golberg ◽  
...  
Keyword(s):  
Flow Cytometry ◽  
Life Cycle ◽  
Abiotic Factors ◽  
Physiological Status ◽  
Seaweed Cultivation ◽  
Reproductive Growth ◽  
Biotic And Abiotic Factors ◽  
Flow Cytometric ◽  
Abiotic Stimuli ◽  
Fundamental Shift

Abstract Controlling the life cycle of the green macroalga Ulva (Chlorophyta) is essential to maintain its efficient aquaculture. A fundamental shift in cultivation occurs by transforming the thallus cells into gametangia and sporangia (sporulation), with the subsequent release of gametes and zoids. Sporulation occurrence depends on algal age and abiotic stimuli and is controlled by sporulation inhibitors. Thus, quantification of sporulation intensity is critical for identifying the biotic and abiotic factors that influence the transition to reproductive growth. Here, we propose to determine the sporulation index by measuring the number of released gametes using flow cytometry, in proportion to the total number of thallus cells present before the occurrence of the sporulation event. The flow cytometric measurements were validated by manually counting the number of released gametes. We observed a variation in the autofluorescence levels of the gametes which were released from the gametangia. High autofluorescence level correlated to phototactically active behaviour of the gametes. As autofluorescence levels varied between different groups of gametes related to their mobility, flow cytometry can also determine the physiological status of the gametes used as feedstock in seaweed cultivation.

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