scholarly journals Assessment of Bolbophorus damnificus prevalence and cercariae shedding in Planorbella trivolvis populations from catfish aquaculture ponds in Mississippi, USA

2020 ◽  
Author(s):  
Mackenzie A. Gunn ◽  
Peter J. Allen ◽  
Thomas Graham Rosser ◽  
David J. Wise ◽  
Lester H. Khoo ◽  
...  
Keyword(s):  
Aquaculture Ponds ◽  
Planorbella Trivolvis

A STUDY ON MINERAL SUPPLEMENTATION IMPROVING WATER QUALITY IN AQUACULTURE PONDS

2010 ◽  
Vol 33 (6) ◽  
pp. 1059-1067
Author(s):  
Xing-Long JIANG ◽  
Rui-Zhang GUAN ◽  
E. Boyd Claude
Keyword(s):  
Water Quality ◽  
Mineral Supplementation ◽  
Aquaculture Ponds

FIELD OBSERVATION ON HEAT STORAGE PHENOMENON OBSERVED IN TROPICAL SALINE AQUACULTURE PONDS

2019 ◽  
Vol 75 (2) ◽  
pp. I_679-I_684
Author(s):  
Akinori OZAKI ◽  
Panitan KAEWJANTAWEE ◽  
Monton ANONGPONYOSKUL ◽  
Nguyen Van THINH ◽  
Masayoshi HARADA ◽  
...  
Keyword(s):  
Field Observation ◽  
Heat Storage ◽  
Aquaculture Ponds

scholarly journals Tracking changes in aquaculture ponds on the China coast using 30 years of Landsat images

2021 ◽  
Vol 102 ◽  
pp. 102383
Author(s):  
Yuanqing Duan ◽  
Bo Tian ◽  
Xing Li ◽  
Dongyan Liu ◽  
Dhritiraj Sengupta ◽  
...  
Keyword(s):  
Landsat Images ◽  
Aquaculture Ponds ◽  
China Coast

scholarly journals Bacterial Communities and Enzymatic Activities in Sediments of Long-Term Fish and Crab Aquaculture Ponds

2021 ◽  
Vol 9 (3) ◽  
pp. 501
Author(s):  
Zhimin Zhang ◽  
Qinghui Deng ◽  
Lingling Wan ◽  
Xiuyun Cao ◽  
Yiyong Zhou ◽  
...  
Keyword(s):  
Bacterial Communities ◽  
Enzymatic Activities ◽  
Nutrient Concentrations ◽  
Biological Processes ◽  
Farming Practices ◽  
Mitten Crab ◽  
Aquaculture Ponds ◽  
Pond Sediments ◽  
Sediment Ph

Aquaculture is among the most important and fastest growing agriculture sectors worldwide; however, it generates environmental impacts by introducing nutrient accumulations in ponds, which are possibly different and further result in complex biological processes in the sediments based on diverse farming practices. In this study, we investigated the effects of long-term farming practices of representative aquatic animals dominated by grass carp (GC, Ctenopharyngodon idella) or Chinese mitten crab (CMC, Eriocheir sinensis) on the bacterial community and enzyme activity of sediments from more than 15 years of aquaculture ponds, and the differences associated with sediment properties were explored in the two farming practices. Compared to CMC ponds, GC ponds had lower contents of TC, TN, and TP in sediments, and similar trends for sediment pH and moisture content. Sediment bacterial communities were significantly different between GC and CMC ponds, with higher bacterial richness and diversity in GC ponds. The bacterial communities among the pond sediments were closely associated with sediment pH, TC, and TN. Additionally, the results showed profoundly lower activities of β-1,4-glucosidase, leucine aminopeptidase, and phosphatase in the sediments of GC ponds than CMC ponds. Pearson’s correlation analysis further revealed strong positive correlations between the hydrolytic enzyme activities and nutrient concentrations among the aquaculture ponds, indicating microbial enzyme regulation response to sediment nutrient dynamics. Our study herein reveals that farming practices of fish and crab differently affect bacterial communities and enzymatic activities in pond sediments, suggesting nutrient-driven sediment biological processes in aquaculture ponds for different farming practices.

scholarly journals Assessment of the Effect of Remediation Strategies on the Environmental Quality of Aquaculture Ponds in Marilao and Meycauayan, Bulacan, Philippines

2018 ◽  
Vol 8 (20) ◽  
Author(s):  
John Vincent R. Pleto ◽  
Mark Dondi M. Arboleda ◽  
Jessica F. Simbahan ◽  
Veronica P. Migo
Keyword(s):  
Oxygen Demand ◽  
River System ◽  
The Philippines ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Culture Period ◽  
Vetiver Grass ◽  
Feed Conversion ◽  
Remediation Strategies ◽  
Aquaculture Ponds

Background. Water quality in the Marilao-Meycauayan-Obando river system (MMORS) of Bulacan, the Philippines, is of great concern due to the pollution load from local industries. The river system is currently used as a source of water for the aquaculture industry in Bulacan. Objectives. In order to address organic and heavy metal pollution, several remediation strategies were tested in aquaculture ponds along the river system. Strategies such as phytoremediation (vetiver grass pontoons), application of probiotics and zeolite (with filtration as pre-treatment) were utilized in ponds to decrease or remove toxic pollutants in water and sediments. Methods. Two sites were chosen as the pilot remediation sites – ponds in Barangay Nagbalon, Marilao and Barangay Liputan, Meycauayan, Bulacan. Pond bottom preparation was done to improve the condition of the pond bottom sediments before stocking by adding zeolite. Physicochemical parameters of water such as dissolved oxygen (DO), temperature, pH, salinity, ammonia, phosphate, biochemical oxygen demand (BOD) and chemical oxygen demand (COD) were monitored throughout the culture period. Heavy metals in sediments and fish were monitored. Fish parameters such as average body weight and feed conversion ratio were determined. Results. The DO levels were below recommended levels in the morning and reached a supersaturated level in the afternoon. Ammonia and COD levels were above recommended limits. A decreasing trend was observed for ammonia levels in treatment ponds. In terms of the growth of milkfish, the pond with probiotics showed the highest growth and better feed conversion ratio in Nagbalon and in the phytoremediation pond in Liputan. Percentage survival of milkfish was much higher at Liputan. Copper, chromium, lead and manganese were detected in pond sediments. After application of zeolite, there was a decrease in lead levels throughout the culture period. Conclusions. The different remediation studies were compared in terms of cost, effectivity and application and phytoremediation (vetiver grass pontoons) was determined to be the most cost-effective remediation strategy. Competing Interests. The authors declare no competing financial interests.

scholarly journals The effects of climate change on the Pleistocene rock art of Sulawesi

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
J. Huntley ◽  
M. Aubert ◽  
A. A. Oktaviana ◽  
R. Lebe ◽  
B. Hakim ◽  
...  
Keyword(s):  
Climate Change ◽  
Rock Art ◽  
Rice Fields ◽  
Present Evidence ◽  
Ambient Temperatures ◽  
Limestone Cave ◽  
Salt Crystallisation ◽  
Standing Water ◽  
Aquaculture Ponds ◽  
Consecutive Dry Days

AbstractThe equatorial tropics house some of the earliest rock art yet known, and it is weathering at an alarming rate. Here we present evidence for haloclasty (salt crystallisation) from Pleistocene-aged rock art panels at 11 sites in the Maros-Pangkep limestone karsts of southern Sulawesi. We show how quickly rock art panels have degraded in recent decades, contending that climate-catalysed salt efflorescence is responsible for increasing exfoliation of the limestone cave surfaces that house the ~ 45 to 20-thousand-year-old paintings. These artworks are located in the world’s most atmospherically dynamic region, the Australasian monsoon domain. The rising frequency and severity of El Niño-induced droughts from anthropogenic climate change (that is, higher ambient temperatures and more consecutive dry days), combined with seasonal moisture injected via monsoonal rains retained as standing water in the rice fields and aquaculture ponds of the region, increasingly provide ideal conditions for evaporation and haloclasty, accelerating rock art deterioration.

Antibiotic resistance of culturable heterotrophic bacteria isolated from shrimp (Penaeus vannamei) aquaculture ponds

2021 ◽  
Vol 172 ◽  
pp. 112887
Author(s):  
Ranjit Kumar Nadella ◽  
Satyen Kumar Panda ◽  
B. Madhusudana Rao ◽  
K. Pani Prasad ◽  
R.P. Raman ◽  
...  
Keyword(s):  
Antibiotic Resistance ◽  
Heterotrophic Bacteria ◽  
Penaeus Vannamei ◽  
Culturable Heterotrophic Bacteria ◽  
Aquaculture Ponds
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