PERU fishing with guts to report…
Just completed the first phase of a research project that determined the population status of the American eel on the Atlantic coast of the Dominican Republic during the corresponding capture live minnows 2012-2013 and 2013-2014 seasons.
The study was led by Engineer Victorino Rodríguez Castillo, Expertise in Aquaculture Research Professor ISA University who had the collaboration of researchers and specialists of the Dominican Institute of Agricultural and Forestry Research (IDIAF), the Dominican Council of Fisheries and Aquaculture (CODOPESCA) and ISA University.
The high complexity of the life cycle of the American eel contributes to the difficulty to determine the population status of this species.
This fish has been little studied: the historical data are scarce for most areas of the Atlantic coast, and there is no information for South Carolina.
In the long term, the data collected in the northeastern United States and southeastern Canada, indicate a decrease in the recruitment of children and adult populations (ASMFC 2000).
In addition, FAO, from the 60s shows that the species has declined in population due to changes in their environment by pollution and the construction of dams in riverbeds where it is.
On the Atlantic coast of the Dominican Republic, the low population density of the American eel affects their growth. This has caused a decrease in the population, and is an important development of the industry in the country (CODOPESCA 2012) limiting factor.
In the first stage of the research project, in which participated institutions linked Dominican aquaculture industry, the current situation of the American eel in the mouths of the rivers of the country's Atlantic coast was evaluated. We also studied the effect of salinity and population density on adaptation to aquatic environments sweets American eel, under controlled conditions.
Preliminary results indicate that the capture of live fry of A. rostrata was higher in the period 2013-2014 than in 2012-2013. The index of catch per unit effort of live eel fry was also higher in 2013-2014.
The rivers were Bajabonico biggest catch with 1,110,000 fry; Yásica with 720,000 fingerlings; Yaque del Norte with 282,000 fingerlings and fry Yabón 360,000.
December and January were the months of greatest catch of live eels fry.
Regarding the effect of salinity and population density in aquaculture environments adaptation sweets American eel, a relationship with mortality of juvenile eels was observed. The treatment with the lowest rate was recorded D2 P1 (eel population density = 50/12 L of water and period decreased level of salinity = 20 days), this treatment obtained a mortality rate of 16%.
As for the weight gain of juvenile eel over a period of 30 days, the treatment with greater weight gain was D2 P2 (eel population density = 50/12 L of water and period decreased level of recorded Salinity = 30 days), with an average of 0.5125 g.
Regarding the gain length of the fry of Anguilla in a period of 30 days, the treatment had the highest gain in length, was the D1 P2 (eel population density = 40/12 L of water and period decreased level Salinity = 30 days), with an average of 0.2108 cm.
This research project started in 2012 and completed in 2017.
In the second phase (2015-2017) the bycatch of American eel and behavior in captivity of this fish species has great importance in the Dominican Republic will be assessed.
The results obtained will serve to map technological trends and to conduct further research on handling and potential commercial cultivation of this species in the country.
SOURCE: Fis.com
