Cleaner shrimp (Decapoda) regularly interact with conspecifics and client reef fish, both of which appear colourful and finely patterned to human observers. However, whether cleaner shrimp can perceive the colour patterns of conspecifics and clients is unknown, because cleaner shrimp visual capabilities are unstudied. We quantified spectral sensitivity and temporal resolution using electroretin...

Two experimental feeding trials were conducted during four weeks to evaluate the use of Ulva lactuca in shrimp culture: (1) for wastewater bioremediation, and (2) using different inclusion levels of U. lactuca meal in shrimp feed. In feeding trial 1, shrimp reared under seaweed U. lactuca water exchange in a re-circulation system (SWE) resulted in similar growth and feed utilization as shrimp r...

The objective of this study was to document the immunological effects of growing shrimp in biofloc systems. The experiment consisted of four types of biofloc systems in which bioflocs were produced by daily supplementation of four different carbon sources, i.e. molasses, tapioca, tapioca-by-product, and rice bran, at an estimated C/N ratio of 15 and a control system without any organic carbon a...

Integrated pest management is widely applied in terrestrial agriculture, but less so in aquaculture. Parallels to insect control in agricultural fields were exploited in this application of integrated pest management principles to control burrowing shrimp Neotrypaea californiensis and Upogebia pugettensis in Pacific Northwest U.S.A. oyster aquaculture. The pesticide carbaryl has been applied to...

Taura syndrome virus (TSV) has caused major economic losses to shrimp aquaculture throughout the world. TSV has been reported to infect a number of penaeid species as hosts. In this study, we reported the natural infection of TSV in farm-reared Penaeus monodon from eastern provinces of Thailand between June to September 2004. There were different degrees of disease outbreak severity. In some ca...

White shrimp Litopenaeus vannamei held in 25x seawater at 27 8C or 28 8C were injected with TSB-grown Vibrio alginolyticus at 1 10 colony-forming units (cfu) shrimp 1 or 1 10 cfu shrimp , and then cultivated onward at water temperatures varying from 20 to 34 8C. Over 24–144 h, mortality of V. alginolyticus-injected shrimp held at 34 8C or 32 8C was significantly higher than that of shrimp held ...

Title of Document: INDIVIDUAL AND POPULATION-LEVEL EFFECTS OF SOLID COAL COMBUSTION RESIDUE ON THE ESTUARINE GRASS SHRIMP (PALAEMONETES PUGIO) Danika M. Kuzmick, Master of Science, 2006 Directed By: Dr. Christopher Rowe, Department of Marine Estuarine and Environmental Science Burning coal for electricity produces solid coal combustion residue (CCR), which is rich in potentially toxic trace ele...

Eyestalk ablation is the most common procedure to induce gonadic maturation in commercial hatcheries of penaeid shrimp. In addition to reproduction, other physiological and metabolic processes are affected by removal of the X-organ sinus gland complex located in the eyestalk. In this study, the effect of unilateral and bilateral eyestalk ablation on the concentration of several hemolymph metabo...

There is currently concern and controversy in the shrimp industries of the Americas about the risk posed by the importation and reprocessing of shrimp infected with white spot syndrome virus (WSSV) and yellow head virus (YHV). To further understand the risk, more knowledge concerning the quantitative virus load of infected shrimp is needed. The present study was carried out to better define, us...