THE EFFECT OF TEMPERATURE ON THE GROWTH AND SURVIVAL OF SEVERAL MARINE ALGAL SPECIES

1961 ◽  
Vol 120 (2) ◽  
pp. 255-264 ◽  
Author(s):  
RAVENNA UKELES
Keyword(s):  
Algal Species ◽  
Effect Of Temperature ◽  
Growth And Survival ◽  
Marine Algal

scholarly journals ECOTYPIC VARIATION IN GROWTH AND SURVIVAL TEMPERATURE OF CLADOPHORA VAGABUNDA (CHLOROPHYCEAE) ISOLATES FROM DIFFERENT CLIMATIC ZONES

2018 ◽  
Vol 28 ◽  
pp. 43-54 ◽  
Author(s):  
Agus M. Hatta ◽  
A. M. Breeman
Keyword(s):  
Algal Species ◽  
High Stress ◽  
Effect Of Temperature ◽  
Western Atlantic ◽  
Relative Growth Rates ◽  
Growth And Survival ◽  
Optimum Range ◽  
Green Algal ◽  
Varied Temperature ◽  
Lower Maximum

The effect of temperature on relative growth rates (RGR) and the ability to survive at stress temperatures have been investigated in isolates of the green algal species Cladophora vagabunda from Roscoff (Eastern Atlantic, temperate), Corsica (Mediterranean, subtropical), Western Australia (Indian Ocean, subtropical) and Curacao (Western Atlantic, tropical). Growth was observed between 1O°-35°C, except in the Roscoff isolate which grew between 10°-30°C and a temperature of 5°C was too low for growth in all isolates. Those indicate that all isolates were comparatively eurythermal. Variations in RGR were observed with a high maximum RGR in the W. Australian and Roscoff isolates with ca. 74% increase in length per day at 30°C, and a lower maximum RGR in the Corsican and Curacao isolates with ca. 30-50% increase in length per day at 20°-25°C. The broadest optimum range (between 15°-30°C) was shown by the Corsican isolate and the narrowest optimum range (between 25°-30°C) by the Curacao isolate. At a low stress temperature of 0°C, all isolates survived for at least 30 days without damage, after 30-50 days the Roscoff and Curacao isolates showed damage (cell bleaching) but they recovered at 20°C. The W. Australian and the Corsican isolates survived undamage for 60 days. At a high stress temperature of 35°C, the W. Australian and the Curacao isolates survived for 60 days, but the other two isolates died within 30 days. The different temperature responses of the isolates demonstrated the ability of Cladophora vagabunda to exist in varied temperature environments.

Effect of temperature and food ration on the growth and survival of early and mid-stage phyllosomas of the spiny lobster Jasus verreauxi

2001 ◽  
Vol 52 (8) ◽  
pp. 1459 ◽  
Author(s):  
Graeme A. Moss ◽  
Lennard J. Tong ◽  
Sarah E. Allen
Keyword(s):  
Feeding Rate ◽  
Spiny Lobster ◽  
Artemia Salina ◽  
Growth Increment ◽  
Effect Of Temperature ◽  
Total Consumption ◽  
Food Ration ◽  
Growth And Survival

Instar 1, 3, 5, and 7 phyllosomas of the spiny lobsterJasus verreauxi were reared individually at one of four temperatures (18, 21, 24, and 27C) and fed low, medium, or high rations of 2- to 3-mm Artemia salina. An increase in the temperature reduced the intermoult period for all instars tested, but only the instar 5 phyllosomas showed any significant differences in postmoult size with temperature; those at 18C were smaller. Phyllosomas reared at 18C ate fewer Artemia each day than did those at the higher temperatures, but instars 3 and 5 at 18C consumed more in total over the intermoult period. Survival for all instars tested was lowest at 18C. Increasing the food rations affected the growth and survival of instar 5 and 7 phyllosomas; those fed at the lower rations took longer to moult and had a smaller growth increment. For all instars tested, the feeding rate and total consumption increased with food ration.

scholarly journals EXTRACTION, ISOLATION OF ACTIVE PRINCIPLES, ANTI-BACTERIAL AND WOUND HEALING ACTIVITY OF THE MARINE ALGAL SPECIES OEDOGONIUM GLOBOSUM AND OEDOGONIUM INTERMEDIUM

2021 ◽  
pp. 72-77
Author(s):  
KARPAKAVALLI MEENAKSHISUNDARAM ◽  
PRAKASH GOVINDARAJ ◽  
SIVASUBRAMANIAM P. ◽  
RANJITHKUMAR DHANARAJ ◽  
MOHAN SELLAPPAN
Keyword(s):  
Wound Healing ◽  
Research Work ◽  
Algal Species ◽  
Raw Material ◽  
Spectral Studies ◽  
Pharmacological Activities ◽  
Methanolic Extracts ◽  
Wide Range ◽  
Marine Algal ◽  
Wound Healing Activity

Objective: Algae is the undisputed treasures of the sea and are a valuable raw material, providing unlimited opportunities for new drug discoveries. Marine algal products are in demand in the international market in the form of standardized algal extracts or semi-finished products. Methods: Aqueous and methanolic extracts of Oedogonium globosum and Oedogonium intermedium species were obtained maceration and hot percolation. The active principles from O. intermedium were isolated, purified by column chromatography, and characterized by spectral studies IR, λmax, 1HNMR and MS. The extracts of Oedogonium species were screened for their anti-microbial effects, acute dermal irritation and wound-healing activity studies. Results: Comparing to Oedogonium intermedium (45 %, 90 %, 87 %), very low extractive yields were obtained for Oedogonium globosum (10.80 %, 37 %, 28 %). At phytochemical screening, Terpenoids, Flavanoids and, Glycans were found to be present in a significant amount and upon their isolation, it was found that a collection of fractions from cold extract with Rf value in the range 0.32-0.34 as Glycans and those from the hot extract with 0.40-0.72 as Flavanoids and those from methanolic extracts with 0.23, 0.44 and 0.71 as for Terpenoids. Anti-bacterial study revealed out the fact of Oedogonium species could give higher inhibition to gram-positive than for gram-negative bacteria at (10 μg/10μl/disc) concentration. No symptoms of systemic toxicity and mortality were observed. Silver sulfadiazine, more potent in wound closure, the effect of methanolic extracts of O. intermedium (87 %) was almost at par to the standard (95 %) in action and significantly greater than O. globosum (72 %, P<0.05). Conclusion: Admittedly, Oedogonium type algal species can be known as medicinal algae with a plethora of a wide range of pharmacological activities. Thus, this research work may be considered further for extensive innovative discoveries of new lead molecules and any other pharmacological activities, in the future.

scholarly journals Betaine Yields from Marine Algal Species Utilized in the Preparation of Seaweed Extracts Used in Agriculture

2010 ◽  
Vol 5 (4) ◽  
pp. 1934578X1000500 ◽  
Author(s):  
Gerald Blunden ◽  
Peter F. Morse ◽  
Imre Mathe ◽  
Judit Hohmann ◽  
Alan T. Critchley ◽  
...  
Keyword(s):  
Marine Algae ◽  
Algal Species ◽  
First Record ◽  
Commercial Production ◽  
The Other ◽  
Minor Constituent ◽  
Laminaria Digitata ◽  
Seaweed Extracts ◽  
Marine Algal ◽  
A Minor

Ascophyllum nodosum, and to a lesser extent, Laminaria digitata, L. hyperborea and Fucus serratus, are marine algal species utilized in the commercial production of seaweed extracts used in agriculture. Betaines have been shown to be important constituents of these extracts, but there appears to have been no study made on whether there are variations in the betaine contents of these species based on either the place or date of collection. Samples of each of the four species were collected from widely separated areas at different times of the year. Also, in the case of A. nodosum, approximately monthly collections were made from one location. The betaines detected in the various collections of the same species showed little variation, although in the case of A. nodosum, glycinebetaine was found as a minor constituent in some samples, but was not detected in others. Trigonelline was found in all the tested samples of the two Laminaria species; this is, to our knowledge, the first record of this betaine in marine algae. With the exception of trigonelline in the Laminaria species, the betaine yields from the various samples of L. digitata, L. hyperborea and F. serratus showed little variation, regardless of either the place or date of collection. The trigonelline contents of the Laminaria species collected at one location (Finavarra, Ireland), in particular of L. hyperborea, was substantially greater than those from the other places of collection. In the case of A. nodosum, the betaine yields from samples collected at one site (Dale, Pembrokeshire, UK) were significantly higher than those from the other places of collection, which were very similar to each other. There was no clear indication of seasonal variation in betaine yields from A. nodosum.

Effect of Temperature on Initial Feeding in Alevins of Chinook Salmon (Oncorhynchus tshawytscha)

1982 ◽  
Vol 39 (12) ◽  
pp. 1554-1562 ◽  
Author(s):  
T. A. Heming ◽  
J. E. McInerney ◽  
D. F. Alderdice
Keyword(s):  
Chinook Salmon ◽  
Oncorhynchus Tshawytscha ◽  
Food Presentation ◽  
Effect Of Temperature ◽  
Mature Stage ◽  
Growth And Survival ◽  
Fish Size ◽  
Stage Of Development ◽  
Active Feeding ◽  
Feeding Zone

Growth and survival of chinook salmon (Oncorhynchus tshawytscha) during the transition to active feeding were examined in relation to the timing of initial food presentation at 6, 8, 10, and 12 °C. The transition to active feeding in these salmon involved a period of "precocious feeding" during which ingestion of food had no effect on fish size, growth rate, or survival. Initial utilization of food for growth and survival did not coincide with any specific stage of development, but rather it occurred earlier and at a less mature stage of development at higher temperatures. Delays in initial food presentation beyond this point reduced fish size and survival. Temperature and the timing of initial food presentation interacted to create a zone of optimum feeding. Biomass production was maximized when alevins began to feed within this zone, independent of the precise time of initial food presentation or temperature. This optimum feeding zone existed at temperatures below 12 °C, between 905 thermal units (tu) postfertilization and a point (F, tu) which varied with temperature (T, °C) as F = 1201.1 − 20.3 T.Key words: temperature, initial feeding, Oncorhynchus tshawytscha, fish culture

scholarly journals Marine algal zonation and substratum in Beer Bay, south-east Devon

1957 ◽  
Vol 36 (3) ◽  
pp. 519-528 ◽  
Author(s):  
G. T. Boalch
Keyword(s):  
Algal Species ◽  
Fucus Vesiculosus ◽  
Ulva Lactuca ◽  
Intertidal Zonation ◽  
Marine Algal

The intertidal zonation of the dominant algal species in Beer Bay, south-east Devon, was examined in relation to substratum by means of plane-table maps and transects. The dominance of Ulva lactuca on colonies of the reef-building worms Sabellaria alveolata was noted, but the distributions of Fucus vesiculosus, F. serratus, Gigartina stellata and Enteromorpha spp. showed no correlation with substratum.

Phototoxicity to selected marine and freshwater algae of polyacetylenes from species in the Asteraceae

1981 ◽  
Vol 59 (1) ◽  
pp. 54-58 ◽  
Author(s):  
Thor Arnason ◽  
Janet R. Stein ◽  
Elizabeth Graham ◽  
Chi-Kit Wat ◽  
G. H. Neil Towers ◽  
...  
Keyword(s):  
Small Group ◽  
Algal Species ◽  
Freshwater Algae ◽  
Uv Treatment ◽  
Marine Algal ◽  
Aldehyde Groups ◽  
Toxic Reactions

The phototoxicity of polyacetylenes from representatives of the Asteraceae to a broad range of freshwater and marine algal species was observed. In the tests triacetylenes were more toxic than diacetylenes. In addition, a small group of polyacetylenes with terminal alcohol or aldehyde groups were found to be toxic with or without ultraviolet (UV) treatment (300–400 nm). Quantitative tests with Euglena and Valonia indicated toxic reactions with three compounds at concentrations greater than 1 ppm. Considering the toxicity of polyacetylenes to bacteria, fungi, invertebrates, and fish, the present work with plants is further evidence of their general cytotoxic nature.

scholarly journals Notes on Three Marine Algal Species from Korea

2013 ◽  
Vol 25 (4) ◽  
pp. 775-780 ◽  
Author(s):  
Pil Joon Kang ◽  
Ki Wan Nam
Keyword(s):  
Algal Species ◽  
Marine Algal

scholarly journals The Effect of High Temperature on the Growth Performance of Hybrid Tilapia Oreochromis niloticus X Oreochromis aureus Juveniles Reared in a Recycling System

2019 ◽  
pp. 1-8
Author(s):  
Ana Laura Ibáñez ◽  
Tanahiri Torres-Vázquez ◽  
Sergio Humberto Álvarez-Hernández
Keyword(s):  
Water Temperature ◽  
Growth Performance ◽  
Freshwater Ecosystems ◽  
Effect Of Temperature ◽  
Oreochromis Aureus ◽  
Temperature Growth ◽  
Growth And Survival ◽  
Final Weight ◽  
Dissolved Reactive Phosphorus ◽  
Reactive Phosphorus

Tilapia juveniles live in littoral regions of freshwater ecosystems which have temperatures that may reach critical values for growth, especially in face of the onslaught of climate change. This study analyzes the effect of temperature (25, 30, 35, 40°C) on the growth and survival of hybrid tilapia juveniles in a re-circulating system. Duplicate groups of 30 juveniles were stocked in 200 L tanks in a closed, re-circulating system. Automatic heaters were used to establish the water temperatures, commercial food was supplied at 5% of their weight as daily ration. Fish were weighed and measured at 15-day intervals for a period of 3 months. Water temperature and dissolved oxygen were monitored daily. Ammonia, nitrates and dissolved reactive phosphorus were monitored every third day. Fish responses were estimated through variations in length, weight and inter-circuli space of fish scales. Average initial and final weight and length, Specific growth rate (SGR), Fulton Index (FI), Length-weight relationship and survival were used to assess tilapia growth performance. Weight, length, SGR and FI were significantly affected (P < 0.05) by water temperature. Growth of the fish reared at 30oC was almost one third greater than that at 25°C and one sixth greater than that at 35°C. Except for fish reared at 40°C, the other treatments showed a positive allometric growth, with the better results recorded for the 30 and 35°C treatments. The fish reared at 40°C survived only two weeks while the survival rate of 98, 90 and 88.3% for 25, 30 and 35°C, respectively.

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