Aquaculture Magazine

Vigo fishermen collaborate in study on megrim reproductive potential

In the survey held in Gran Sol, which ended last Wednesday, March 22, the gonads were collected from a total of 80 females and 40 males of L. whiffiagonis and a total of 26 females and 19 males of L. bosccii. With these samples almost all of the necessary ones for the study of L. whiffiagonis have been completed as well as 30 per cent of those of the study of L. boscii.

The Organization of Producers of Fresh Fisheries of the Port of Vigo (OPPF-4) is working closely with the Oceanographic Centre of Vigo of the Spanish Institute of Oceanography (IEO) to study the megrim reproductive potential in Gran Sol and the North-Western Cantabrian coast.

OPPF-4, which is an entity affiliating to the Cooperative of Fishing Shipowners of the Port of Vigo (ARVI), addresses this study within the framework of its Production and Marketing Plan, financed by FEMP funds through the Secretariat of Marine Affairs of Xunta de Galicia.

ARVI explains that the study of maturation sizes addresses the need to obtain and update information on the fundamental biological parameters of these two species for a better assessment of the state of the stock. The objective of the study is to estimate the maturity size of L. whiffiagonis and L. boscii in the Gran Sol and Cantabrian-Northwest littoral stocks in a robust manner (not affected by small variations).

To this end, a sufficient number of males and females of both species were sampled by size range in each study area by means of shipments on board different commercial vessels.

In the survey held in Gran Sol, which ended last Wednesday, March 22, the gonads were collected from a total of 80 females and 40 males of L. whiffiagonis and a total of 26 females and 19 males of L. bosccii. With these samples almost all of the necessary ones for the study of L. whiffiagonis have been completed as well as 30 per cent of those of the study of L. boscii.

Next week will be the beginning of the survey on the coast that is expected to last until Easter, and then return to another survey in Gran Sol with the aim of completing the missing samples.

At dawn on Monday, April 3, shipments will begin on the Northwest Cantabrian coast, aboard the vessel Pescasar of the company Hermanos Sar Romero, who will collaborate altruistically in this initiative, informed ARVI.

The sector expects that the estimation of a robust and precise maturity size for each of the species and study areas will allow a more accurate assessment of the number of breeding individuals of the stocks and improve the analysis of stock-recruitment relationships, Which results in a more real valuation of the state of the stock for an improvement in its sustainable management.

Source: http://fis.com/fis/worldnews/worldnews.asp?l=e&country=0&special=&monthyear=&day=&id=90913&ndb=1&df=0

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