Light intensity affects the survival and growth of matrinxã larvae, Brycon amazonicus (Spix & Agassiz, 1829)

2019 ◽  
Vol 50 (9) ◽  
pp. 2410-2418 ◽  
Author(s):  
Reinaldo Luzeiro Muller ◽  
Marle Angélica Villacorta‐Correa ◽  
Thaís Billalba Carvalho
Keyword(s):  
Light Intensity ◽  
Survival And Growth

Effects of light intensity and photoperiod on survival and growth of walleye pollock (Gadus chalcogrammus) larvae

2021 ◽  
Vol 33 (4) ◽  
pp. 859-865
Author(s):  
Ki-Wook LEE ◽  
Gyeong-Sik HAN ◽  
Soon-Gyu BYUN ◽  
Woo-Jin KIM ◽  
Kyoung-Duck KIM ◽  
...  
Keyword(s):  
Light Intensity ◽  
Walleye Pollock ◽  
Survival And Growth

Influence of light intensity and photoperiod on embryonic development, survival and growth of threatened catfish Ompok bimaculatus early larvae

2020 ◽  
Vol 97 (3) ◽  
pp. 740-752
Author(s):  
Kalpana Arambam ◽  
Soibam Khogen Singh ◽  
Pradyut Biswas ◽  
Arun Bhai Patel ◽  
Alok Kumar Jena ◽  
...  
Keyword(s):  
Light Intensity ◽  
Embryonic Development ◽  
Survival And Growth ◽  
Ompok Bimaculatus ◽  
Early Larvae

scholarly journals SURVIVAL AND GROWTH OF MILKFISH (Chanos chanos) LARVAE UNDER DIFFERENT COLOUR VALUES OF ORANGE

2017 ◽  
Vol 3 (1) ◽  
pp. 8
Author(s):  
Taufik Ahmad ◽  
Titiek Aslianti
Keyword(s):  
Light Intensity ◽  
Chanos Chanos ◽  
Survival And Growth

An orange painted tank was proved to be suitable for rearing milkfish larvae, However, light intensity was suspected to affect the suitability such tanks.

Modified Photoperiod and Light Intensity Influence on Survival and Growth of Stage 2 Juvenile Signal CrayfishPacifastacus leniusculus

1996 ◽  
Vol 6 (3) ◽  
pp. 33-37 ◽  
Author(s):  
M. Sáez-Royuela ◽  
J. M. Carral ◽  
J. D. Celada ◽  
C. Muñoz ◽  
J. R. Pérez
Keyword(s):  
Light Intensity ◽  
Survival And Growth

scholarly journals Effects of Soil Compaction and Relative Light Intensity on Survival and Growth Performance of Planted Shorea macrophylla (de Vriese) in Riparian Forest along Kayan Ulu River, Sarawak, Malaysia

2018 ◽  
Vol 2018 ◽  
pp. 1-11
Author(s):  
Aina Nadia Najwa Mohamad Jaffar ◽  
Mohd Effendi Wasli ◽  
Mugunthan Perumal ◽  
Jonathan Lat ◽  
Hamsawi Sani
Keyword(s):  
Light Intensity ◽  
Growth Performance ◽  
Soil Compaction ◽  
Riparian Forest ◽  
Average Height ◽  
Annual Increment ◽  
Compacted Soils ◽  
Relative Light Intensity ◽  
Survival And Growth ◽  
Mean Annual Increment

A study was conducted in riparian forest along Kayan Ulu River, Sarawak, Malaysia, to investigate the effects of soil compaction and relative light intensity (RLI) on survival and growth performance of planted Shorea macrophylla. The study sites were stands reforested in different years (1996: SPD96; 1997: SPD97; 1998: SPD98; 1999: SPD99). The survival, growth performance, soil compaction, and RLI were measured. SPD96 trees had the highest survival (84%) and showed the most favourable growth. Average height, mean annual increment in height, and RLI were highest in SPD97 while mean annual increment in volume was highest in SPD98. Soil compaction in SPD98 and SPD99 was higher as compared to SPD96 and SPD97. This was due to the compacted soils caused by anthropogenic activities and natural causes (wet soils) in riparian forest along Kayan Ulu River at shallow depth. High survival and favourable growth performance of S. macrophylla were influenced by the edaphic factor with special reference to less compacted soils and high RLI. Stepwise multiple regression demonstrated significant effects of soil penetration resistance at the depth of 0-30 cm and RLI on mean annual increment in diameter. Further ecological studies on other environmental factors should be implemented to draw up a Dipterocarp planting scheme for the future restoration of riparian ecosystem.

Fine structure of the retina of the giant scallop, Placopecten magellanicus

1984 ◽  
Vol 42 ◽  
pp. 312-313
Author(s):  
C.V.L. Powell
Keyword(s):  
Fine Structure ◽  
Electron Microscope ◽  
Light Intensity ◽  
Scanning Electron Microscope ◽  
Eye Development ◽  
Preliminary Observation ◽  
Columnar Epithelium ◽  
Placopecten Magellanicus ◽  
Environmental Light ◽  
Scanning Electron

The overall fine structure of the eye in Placopecten is similar to that of other scallops. The optic tentacle consists of an outer columnar epithelium which is modified into a pigmented iris and a cornea (Fig. 1). This capsule encloses the cellular lens, retina, reflecting argentea and the pigmented tapetum. The retina is divided into two parts (Fig. 2). The distal retina functions in the detection of movement and the proximal retina monitors environmental light intensity. The purpose of the present study is to describe the ultrastructure of the retina as a preliminary observation on eye development. This is also the first known presentation of scanning electron microscope studies of the eye of the scallop.

Effect of light intensity on the ultrastructure of the filamentous cyanobacterium, Anabaena variabilis

1988 ◽  
Vol 46 ◽  
pp. 300-301
Author(s):  
C. S. Bricker ◽  
S. R. Barnum ◽  
B. Huang ◽  
J. G. Jaworskl
Keyword(s):  
Fatty Acid ◽  
Light Intensity ◽  
Acid Content ◽  
Fatty Acid Content ◽  
Anabaena Variabilis ◽  
Chloroplast Envelope ◽  
Major Constituent ◽  
Filamentous Cyanobacterium ◽  
Photosynthetic Membrane ◽  
Effect Of Light

Cyanobacteria are Gram negative prokaryotes that are capable of oxygenic photosynthesis. Although there are many similarities between eukaryotes and cyanobacteria in electron transfer and phosphorylation during photosynthesis, there are two features of the photosynthetic apparatus in cyanobacteria which distinguishes them from plants. Cyanobacteria contain phycobiliproteins organized in phycobilisomes on the surface of photosynthetic membrane. Another difference is in the organization of the photosynthetic membranes. Instead of stacked thylakolds within a chloroplast envelope membrane, as seen In eukaryotes, IntracytopIasmlc membranes generally are arranged in three to six concentric layers. Environmental factors such as temperature, nutrition and light fluency can significantly affect the physiology and morphology of cells. The effect of light Intensity shifts on the ultrastructure of Internal membrane in Anabaena variabilis grown under controlled environmental conditions was examined. Since a major constituent of cyanobacterial thylakolds are lipids, the fatty acid content also was measured and correlated with uItrastructural changes. The regulation of fatty acid synthesis in cyanobacteria ultimately can be studied if the fatty acid content can be manipulated.

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