The spionid polychaete Polydora nuchalis was collected from the mud bottoms of penaeid shrimp and oyster culture ponds at two aquaculture farms on Oahu, Hawaii. The polychaetes formed masses of mud tubes , which contained egg capsules and early and late larval stages. Polydora nuchalis is not a shell-boring worm like the congener P. websteri that infects commercial shellfish, but is considered ...

This study aimed to quantify the accumulation and elimination of Enrofloxacin (ENRO) and Ciprofloxacin (CIPRO) in cultivated Litopenaeus vannamei under controlled laboratory and farm conditions. Laboratory- and farm-raised shrimp were given feed supplemented with 200 mg/kg ENRO for 14 days, followed by a 16-day diet without antibiotics. The levels of ENRO and CIPRO were analyzed by High Perform...

ABSTRACT Nutrient flux, net metabolism, and N 2 fixation denitrification processes were estimated compared in two semi-arid subtropical coastal lagoons the Gulf of California: El Soldado (ES), where no wastewater is discharged, Rancho (ER), shrimp farm effluents are regularly discharged. Biogeochemical evaluated with LOICZ model. Flushing time was <2 days both systems. fluxes higher ER than ...

aflatoxins (afs) are one of the most important mycotoxins due to their common occurrence in feedstuffs and feeds that pose a serious threat to humans and animals. although many outbreaks of acute and chronic diseases have been attributed to consumption of aflatoxin-contaminated foods, the most significant effect of aflatoxin is hepatotoxicity in farm animals, especially aflatoxicosis in shrimps...

Effluent water from shrimp ponds typically contains elevated concentrations of dissolved nutrients and suspended particulates compared to influent water. Attempts to improve effluent water quality using filter feeding bivalves and macroalgae to reduce nutrients have previously been hampered by the high concentration of clay particles typically found in untreated pond effluent. These particles i...

Semi-intensive shrimp production in Honduras is based upon use of formulated diets to supply nutrients for shrimp growth. Unconsumed feed contributes nutrients to pond water, which when discharged may deteriorate water quality in receiving waters. This experiment focused on the development of nutrient budgets (nitrogen and phosphorus) in semi-intensively managed shrimp ponds receiving a low or ...

Marine biological invasions have been regarded as one of the major causes of native biodiversity loss, with shipping and aquaculture being the leading contributors for the introductions of alien species in aquatic ecosystems. In the present study, five aquatic alien species (one mollusk, three crustaceans and one fish species) were detected during dives, shore searches and from the fisheries on...

many shrimp farmers were suffering from white spot disease (wsd) onset in last decades. oscillation of environmental factors could lead mortality in susceptible hosts. the results showed mortality started earliear (36h post inoculation) at 25oc in comparison to the temperature more than 29 oc as well as the salinity of 50 ppt in comparison to the lower degrees of salinities. it is concluded tha...

Aquaculture activities are embedded in complex social-ecological systems. However, aquaculture development decisions have tended to be driven by revenue generation, failing to account for interactions with the environment and the full value of the benefits derived from services provided by local ecosystems. Trade-offs resulting from changes in ecosystem services provision and associated impacts...

Vibrio species is one of the pathogenic bacteria infecting shrimps in aquaculture farm has caused severe loss to farm. The aim this research isolate and compare presence spp. commercialize shrimp during stocking process final harvest phase productions. Quantification isolation were conducted measured using Log CFU (colony forming units) counts morphological investigation gram staining conventio...