We investigated the roles of resource availability and phenotypic plasticity in promoting ecological character displacement (i.e., trait evolution stemming from resource competition between species). Because ecological character displacement generates new populations that differ in resource use, this process should only occur when exploitable resources are available. We tested this hypothesis i...

Multiple small-scale transcriptome studies have been undertaken for various members of the Penaeidae. Penaeid shrimp are important both as members of diverse ecosystems around the world and for their importance as commercial commodities. Of the many shrimps, the most important from this family is the Pacific whiteleg shrimp, Litopenaeus vannamei, as it is the primary shrimp used in worldwide aq...

A novel PCR-RFLP method has been developed for the identification of six commercially relevant penaeid shrimp species in raw and processed food products. The method can be completed within 8 h. To implement the method, PCR amplification with the crustF/crustR primers, targeted to the amplification of a ca. 181 bp region of the cytochrome b (cytb) mitochondrial gene in penaeid shrimps, was coupl...

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...

The use of chitin as raw material to obtain glucosamine hydrochloride at laboratory level was investigated. Chitin was extracted from shrimp shells by deproteinization, demineralization and depigmentation. Afterwards, glucosamine hydrochloride was produced in four main stages: (1) acid hydrolysis of chitin with 12 M hydrochloric acid using the reflux technique; (2) filtration of the solution to...

Brine shrimp produce a maladaptive excess of sons when co-occurring with females from a related parthenogenetic species. Still, this sex ratio may be adaptive if, by mating with females of the other species, males miss out on mating with their own.

BACKGROUND Abdominal segment deformity disease (ASDD) of cultivated whiteleg shrimp Penaeus (Litopenaeus) vannamei causes economic loss of approximately 10% in affected specimens because of the unsightliness of distorted abdominal muscles. It is associated with the presence of viral-like particles seen by electron microscopy in the ventral nerve cords of affected shrimp. Thus, shotgun cloning w...

in this study , samples of farm shrimp species paeneus indicus obtained from different stages of hatchery and rearing period and subsequent marketing , water and sediments of rearing farms and marine shrimp species paeneus semisulcatus , were analysed for vibrio spp . according to the methods described by american public health association . the identified vibrio species , were vibrio alginolyt...

Fatty acid profile of deep-sea mud shrimp (Solenocera hextii) and shovel-nosed lobsters (Thenus unimaculatus) harvested from south-west coast (Arabian Sea) India were evaluated compared. Palmitic oleic acids the principle saturated fatty monounsaturated acids, respectively in lobster species. T. unimaculatus contained greater concentrations C20-22 n-3 polyunsaturated such as docosahexaenoic eic...

Background: Sea foods contain high level of unsaturated fatty acids. The aim of this study is comparison of ώ3 and ώ6 levels in wild and farmed green tiger shrimp (P.semisulcatus). Materials and Methods: in this study 120 shrimps (wild=60 and farmed=60) selected. Analysis of Fatty acids was performed by Gas Chromatography. Two-factor variance difference analysis used for demonstration the effec...