scholarly journals Comparative Analysis of The Two Sites of Lahe (Caulerpa sp.) Growth for Determine The Range of Atmospheric, Physical and Chemical Water Conditions

2020 ◽  
Author(s):  
Christophil Medellu ◽  
Ni Wayan Suriani ◽  
Alfrits Komansilan
Keyword(s):  
Comparative Analysis ◽  
Dissolved Oxygen ◽  
Sea Level ◽  
Air Temperature ◽  
Current Velocity ◽  
Salinity Range ◽  
Natural Growth ◽  
Ecological Conditions ◽  
Nitrate Concentrations ◽  
Physical And Chemical

Abstract Background Ecological conditions determine the growth and productivity of lahe (Caulerpa Sp.). We conduct a comparative study of ecological conditions that affected differences in growth and productivity of lahe in two locations, in the Batunderang village area and the Lapango village area, Sangihe Regency. The ecological factors that we examined include atmospheric, chemical and physical factors. Atmospheric variables include radiation intensity, duration of irradiation, the air temperature above sea level. The physical and chemical parameters of water studied include current velocity, seawater temperature, salinity, current strength, pH, dissolved oxygen, and nitrate concentrations. Results The indicator of lahe growth are: chain length, stem diameter, meristem diameter. The productivity indicator is the wet weight of the lahe harvested by farmers within 90 days. Comparative analysis between locations and measurement positions summarizes the range of ecological conditions for natural growth. The seabed for lahe is 0.8 m − 1.4 m lower than the surface of a coral reef and is not exposed at the lowest tide. The air temperature range at position 20 cm above sea level is 250C − 31.60C, while the temperature of seawater varies between 250C to 28.40C. Daily fluctuations in current velocity at high tides range from 0.09 cm/sec to 2 cm/sec. The salinity range between 27.8 ppt to 28.6 ppt. The pH range of seawater for natural growth is 7.6–8.12, while the dissolved oxygen range is 6 ppm to 6.25 ppm. Nitrate concentrations in lahe growth positions vary between 1.8 ppm − 1.96 ppm. Conclusion This ecological condition guarantees that the productivity of lahe varies between 20–30 kg/m2 for a 90-day harvest period.

scholarly journals ANALISIS KESESUAIAN PERAIRAN UNTUK BUDIDAYA IKAN KERAPU BEBEK (Cromileptes altivelis) DI PERAIRAN PULAU TEGAL TELUK LAMPUNG

2018 ◽  
Vol 6 (2) ◽  
pp. 719 ◽  
Author(s):  
Desti Rizki Anggraini ◽  
Abdullah Aman Damai ◽  
Qadar Hasani
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Water Depth ◽  
Current Velocity ◽  
Sampling Location ◽  
Selling Price ◽  
Chemical Parameters ◽  
Foreign Markets ◽  
Physical And Chemical Parameters ◽  
Physical And Chemical

Tegal Island is part of Lampung Bay which has potential to be the location of aquaculture. One of kind fish that can be cultivated in these area is the humpback grouper (Cromileptes altivelis). Humpback grouper is the most popular fish species in local and foreign markets that have the highest selling price. The purpose of this study were to know the physical and chemical parameters in Tegal Island waters, to know the suitability of the waters for the humpback grouper cultivation in the waters of Tegal Island. The research was conducted in May 2017. The sampling location was 4 stations. The range of water quality values in Tegal island were water depth (15-25 m), dissolved oxygen (7 – 8 mg/l), brightness (5-10 m), salinity (30-34 ppt), temperature (28 – 32°C ), current velocity (20 – 50 m/s), pH (7,7 – 8,0), nitrate (0,9 – 3,2 mg/l) and phosphate (0,2 – 0,5 mg/l). The results showed that the waters of Tegal Island had appropriate water suitability level (St 3), corresponding marginally (St 1 and St 2) and unsuited (St 4) for the cultivation of humpback grouper.

scholarly journals The existence of epiphyte on thallus Eucheuma denticulatum (Rhodophyceae) in varying depths cultivated with vertical net method

2021 ◽  
Vol 869 (1) ◽  
pp. 012008
Author(s):  
N Wati ◽  
M Kasim ◽  
Salwiyah
Keyword(s):  
Dissolved Oxygen ◽  
Current Velocity ◽  
Environmental Parameter ◽  
Chemical Parameter ◽  
Eucheuma Denticulatum ◽  
Significant Negative Effect ◽  
Negative Effect ◽  
Net Method ◽  
Physical And Chemical

Abstract The existence of macroepiphyte is one of the issues seaweed farmers often face. This research aims to explore the existence of macroepiphyte attached to seaweed Eucheuma denticulatum at varying depths using vertical net method. Research found that the highest and the lowest velocity of macroepiphyte on day -10 in the depth of 50 cm and 200 cm is 248,4 and 121,28 ind/m2/day. On day-20, in the depth of 100 cm and 200 cm is 333,54 and 270,01 ind/m2/day. The most dominating macroepiphyte in the attachment velocity is C. Crasa. Physical and chemical parameter showed around 29o-30oC. Current velocity 0,050-0,067 m/sec. Brightness 92%. Salinity 30-33‰. Nitrate 0,237-0,0416 mg/L. Phosphate 0,0015-0,0036 mg/L. Dissolved oxygen 5,7-6,2 mg/L. The obtained optimum environmental parameter and the type of the macroepiphyte attachment did not show any significant negative effect to the growth of E. denticulatum.

scholarly journals Co-existence of Epiphytes on Eucheuma Denticulatum (Rhodophyceae) in Varying Depths Cultivated with Verti Net Method

2021 ◽  
Vol 934 (1) ◽  
pp. 012008
Author(s):  
N Wati ◽  
M Kasim ◽  
S Salwiyah
Keyword(s):  
Dissolved Oxygen ◽  
Current Velocity ◽  
Environmental Parameters ◽  
Chemical Parameters ◽  
Eucheuma Denticulatum ◽  
Significant Negative Effect ◽  
Physical And Chemical Parameters ◽  
Negative Effect ◽  
Net Method ◽  
Physical And Chemical

Abstract The existence of macroepiphytes is one of the issues seaweed farmers often face. This research aimed to explore the co-existence of macroepiphytes with seaweed Eucheuma denticulatum at varying depths using verti net method. Results showed that the highest and the lowest density of macroepiphyte were obtained on day -10 in the depth of 50 cm and 200 cm at 248,4 and 121,28 ind/m2/day, respectively. On day-20, in the depth of 100 cm and 200 cm the densities were 333,54 and 270,01 ind/m2/day, respectively. The most dominant macroepiphyte y is Chatomorpha crasa. Physical and chemical parameters showed a temperature of 29°-30°C, current velocity of 0,050-0,067 m/sec, brightness 92%, salinity 30-33‰, nitrate 0,237-0,0416 mg/L, phosphate 0,0015-0,0036 mg/L and dissolved oxygen 5,7-6,2 mg/L. The obtained optimum environmental parameters and the type of the macroepiphytes did not show any significant negative effect on the growth of E. denticulatum.

Evidence for physical and chemical stratification in Lake Untersee (central Dronning Maud Land, East Antarctica)

1997 ◽  
Vol 9 (1) ◽  
pp. 43-45 ◽  
Author(s):  
U. Wand ◽  
G. Schwarz ◽  
E. Brüggemann ◽  
K. Bräuer
Keyword(s):  
Electrical Conductivity ◽  
Dissolved Oxygen ◽  
Water Column ◽  
Water Body ◽  
East Antarctica ◽  
Bacterial Sulphate Reduction ◽  
Chemical Stratification ◽  
Dronning Maud Land ◽  
Physical And Chemical ◽  
Vertical Gradients

Lake Untersee is the largest freshwater lake in the interior of East Antarctica. It is a perennially ice-covered, max. 169 m deep, ultra-oligotrophic lake. In contrast to earlier studies, we found clear evidence for physical and chemical stratification in the summer of 1991–92. However, the stratification was restricted to a trough, c. 500 m wide and up to 105 m deep, in the south-western part of the lake. There, the water body was distinctly stratified as indicated by sharp vertical gradients of temperature, pH, dissolved oxygen, and electrical conductivity. The water column was anoxic below 80 m. The chemical stratification is also indicated by changes of ionic ratios. Moreover, there was some evidence for methanogenesis and bacterial sulphate reduction in Lake Untersee.

Physical and Chemical Deterioration of Reinforced Concrete Reefs in Tongyeong Reefs Coastal Waters, Korea

2008 ◽  
Vol 42 (3) ◽  
pp. 110-118 ◽  
Author(s):  
H. S. Kim ◽  
C. G. Kim ◽  
W. B. Na ◽  
J. Woo ◽  
J. K. Kim
Keyword(s):  
Reinforced Concrete ◽  
Service Life ◽  
Dissolved Oxygen ◽  
Extreme Event ◽  
Chemical Properties ◽  
Chloride Concentration ◽  
Concrete Cover ◽  
Marine Habitat ◽  
Seawater Salinity ◽  
Physical And Chemical

As part of a marine habitat enhancement project, the physical and chemical deterioration of reinforced concrete reefs that were fully immersed in Tongyeong waters of Korea was investigated. For the investigation, marine environmental factors such as seawater, salinity, pH, dissolved oxygen, sea-bottom materials, and water depth of the targeted sites were surveyed from 1997 to 2001. Then, four reinforced concrete reefs from four different sites were recovered and tested by using various destructive and nondestructive methods. Based on the observations and test results, it was seen that the reinforced concrete reefs have sound physical and chemical properties, except for chloride concentration and its associated factors. However, because of the lack of dissolved oxygen in the targeted seawaters and its continuous supply, it is concluded that the originally designed service life will be achieved, and in fact the concrete reefs will have an even longer service life than expected. By considering an extreme event such as impact loading under installation and construction, a new minimum concrete cover depth of 40 mm is introduced into practice.

Paleoecology of Marine Foraminifera in the Pluvial Estancia Valley, Central New Mexico

1977 ◽  
Vol 7 (2) ◽  
pp. 254-267 ◽  
Author(s):  
F.W. Bachhuber ◽  
W.A. McClellan
Keyword(s):  
New Mexico ◽  
Air Temperature ◽  
Marine Environment ◽  
Developmental Stages ◽  
Geographic Location ◽  
Salinity Range ◽  
Extant Species ◽  
Lake Temperature ◽  
Minimum Depth ◽  
Unusual Occurrence

Two species of marine Foraminifera have been identified in the Quaternary pluvial sequence of the Estancia Valley, central New Mexico. Besides being an unusual occurrence of marine organisms in an inland body of water remote from the marine environment, the Foraminifera yield useful paleolimnological and paleoclimatological information about two major late Wisconsin pluvial lakes. In addition, the geographic location of the Estancia Valley relative to the closest marine environment requires foraminiferal introduction by avian means. Paleontologic evidence verifies the freshwater nature of the pluvial maxima of Late Lake Estancia (18,000-10,500 BP) and Lake Willard (8500-6000 BP) but early lake conditions were considerably different. The occurrence of foraminifers Cribroelphidium selseyense and Protelphidium orbiculare, both extant species, in the sediments from the early part of each pluvial stand indicates that initial lake development was characterized by a salinity range of 25 to 35‰. At these times lake depth approximated 6 m. By comparison, the freshwater maximum of Late Lake Estancia attained a minimum depth of 90 m. The modern holarctic distribution of the Foraminifera could suggest a mean August lake temperature of 10°C during the developmental stages of Late Lake Estancia and Lake Willard. Because of the shallow-water nature of the lake basins it is likely that this temperature was reflective of mean August air temperature. Therefore, a lowering of mean August air temperature of 9.7°C from that of the present is possible.

Comparative analysis of vitamin D content in population of different climatic zones of Carpathian region

2014 ◽  
Vol 18 (4 (72)) ◽  
Author(s):  
V. V. Povorozniuk ◽  
I. V. Pankiv
Keyword(s):  
Vitamin D ◽  
Comparative Analysis ◽  
High Altitude ◽  
Vitamin D Deficiency ◽  
Sea Level ◽  
Severe Form ◽  
Climatic Zones ◽  
Vitamin D Intake ◽  
Carpathian Region ◽  
Low Altitude

The adequate vitamin D intake is found only in 19,5 % of inspected habitants of Carpathian region. The vitamin D deficiency is marked in 135 (80,5 %) and among them severe form is detected in 48 (28,4 %) of the inspected people. Frequency of vitamin D deficiency depends on a residence and increases with the height above a sea level. 25 (ОН) D level is higher among the ihabitants of low altitude region (27,14±1,26 nmol/l) comparatively with data of middle altitude region (21,37±1,34 nmol/l) and high altitude region (15,56±1,04 nmol/l).

scholarly journals Analisis Kesesuaian Perairan untuk Keramba Jaring Apung di Kecamatan Sirah Pulau Padang Kabupaten Ogan Komering Ilir Provinsi Sumatera Selatan

2019 ◽  
Vol 8 (1) ◽  
pp. 20-30
Author(s):  
Rangga Bayu Kusuma Haris ◽  
Indah Anggraini Yusanti
Keyword(s):  
Water Quality ◽  
Current Velocity ◽  
Quality Parameters ◽  
Chemical Parameters ◽  
Chemical Laboratory ◽  
M Current ◽  
Bottom Substrate ◽  
A Value ◽  
Physical And Chemical Parameters ◽  
Physical And Chemical

Haris et al, 2019. The Analysis of Water Suitability for Floating Net Sprouts in Sirah Pulau Padang, Ogan Komering Ilir District, South Sumatra Province. JLSO 8(1):20-30.The purpose of this study is to analyze the level of water suitability of the floating net sprouts in sirah pulau padang, ogan komering river, Serdang Menang Village, OKI South Sumatra Regency based on water physical and chemical parameters. This study was conducted on July - August 2018 at the Komering River, Ulak Jermun village, Terusan Menang Village, and Mangun Jaya Village, OKI District, South Sumatra. The data of sampling was divided into 3 stations, they were; station 1 was Ulak Jermun Village (3 ° 18'45.48 "LS and 104 ° 53'5.32" BT), station 2 was Terusan Menang Village (3 ° 17'14.13 "LS and 104 ° 52'46.78 "BT), and station 3 was Mangun Jaya village (3 ° 18'14.92" LS and 104 ° 52'59.48 "BT). The data of Samples were tested at the chemical laboratory in Palembang Public Water Fisheries and Extension Research Institute directly. The results of the study was for Station 1, Station 2, and Station 3 with a value was  48% with a good feasibility information. The results of measurements of water quality parameters, the pH was about 6.6 - 6.7, temperature was about from 24., 53 - 26.93oC, DO 3.93 - 4.36 mg / l, ammonia was about 0.78 - 0.16 mg / l, water brightness was about from 34.67 - 43.33 cm, CO2 4.53 - 5.03 mg / l, depth 2.36 - 2.47 m, current velocity was about 0.38 - 0.44 m / s, nitrate was about 0.37 - 0.439 mg / l, phosphate was about 0.009 - 0.225 mg / l and the bottom substrate of water was mud.

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