Nine freshwater fish species were sampled from 13 bodies of water in Baja California Sur state, on the Baja California peninsula, Mexico. Twenty-four helminth parasite species of 19 genera and from 13 families were recorded. All are new records for the region, but have been recorded previously in Mexico. No endemic helminth species were identified. Most helminths were larval forms of generalist...

Recently, small model fish, medaka and zebrafish, have been casted a light on environmental science. Transgenic technique is a method that introduce exogenous gene into host genome and enables to generate unique model creature. Adapting transgenic technique on these fish, they become more powerful tool for evaluating aquatic contamination. Chemical analysis and in vitro bioassay, such as ELISA,...

this paper used the results of a research project entitled biodiversity of inland water fishes of iran which was carried out from 2005 to 2010. some 3500 fish specimens were obtained from different basins of iran by using electrofishing method, cast net, gill net and hook. using criteria such as size, shape and color, some of them are considered suitable to keep in aquarium. due to the results ...

The Asian cyprinid fish, the topmouth gudgeon (Pseudorasbora parva), was introduced into Europe in the 1960s. A highly invasive freshwater fish, it is currently found in at least 32 countries outside its native range. Here we analyse a 700 base pair fragment of the mitochondrial cytochrome b gene to examine different models of colonisation and spread within the invasive range, and to investigat...

Prioritization of introduction pathways is seen as an important component of the management of biological invasions. We address whether established alien plants, mammals, freshwater fish and terrestrial invertebrates with known ecological impacts are associated with particular introduction pathways (release, escape, contaminant, stowaway, corridor and unaided). We used the information from the ...

Light is an important abiotic factor that has been associated with fish biology and behaviour. Most fish depends on their vision system to perform activities such as foraging Meager & Luchiari et al. [1,2] breeding. Particularly, biorhythms have been related to feeding time, either in nature or aquaculture as well as under restricted feeding conditions [3]. In recent years, artificial light has...

Making transgenic lines of vertebrates represents a rather new technology. While transgenic fish have been introduced in the laboratory since the n id eighties, it has also becolne a reality in aquaculture since the early nineties. There are many reasons why people want to create genetically modified organisms (GMO) and there are many strategies to nlake "fish with novel genes". As such it ...

Abstract In recent years, with the popularity of lighting infrastructure,indoor visible three-dimensional positioning has attracted extensive attention.However, in algorithm, error is relatively large due to high complexity system. For reason that reduce error, an improved fish swarm algorithm proposed. Adaptive step size and chaotic change are introduced algorithm. order search time swallowing...