Journal of Marine Biology and AquacultureJournal of Marine Biology and AquacultureJournal of Marine Biology and AquacultureJournal of Marine Biology and Aquaculture2381-0750Ommega Online PublishersNew Jersey, USA2855Research ArticleStudy on the efficiency of the growth of the Pacific Oyster “Crassostrea gigas” in Costa Rica (Ostreoida: Ostreidae) according to mesh types Study on the efficiency of the growth of the Pacific Oyster “Crassostrea gigas” in Costa Rica (Ostreoida: Ostreidae) according to mesh types Carlos Pérez ReyesNautical fishing Center NNP NationalLearningInstitute INA Puntarenas Costa Rica Editor* E-mail: cperezreyes@ina.ac.cr
The authors have declared that no competing interests exist.
20200312202061JMBA-20-RA-285506082020281120202020Creative Commons Attribution LicenseThis is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.Introduction The Pacific oyster Crassostreagigas is one of the most important mariculture economic activities around the world Two of the main reasons why it has become such an important aquaculture are it s huge range of tolerance to environmental conditions and low mortality rate in comparison with other cultivations Based on statistics this oyster market is stable In Costa Rica as in other countries the over exploitation of marine resources by fisheries has caused the search for other alternatives of survival This is how the initiative to grow oysters in the Gulf of Nicoya begun under a project managed by the National University of Costa Rica located in Puntarenas The National Institute of learning INA gave technical support to them and JICA offered volunteer expertise to enable the development of this investigation nbsp Objective The objective of this study was to differentiate growth according to different sizes of plastic mesh with respect to the use of saran to improve cultivation techniques in oyster farms nbsp Methods The survey was conducted from May to November 2017 The test was performed on long lines with 16 plastic mesh bags of three different diameter sizes which were placed in suspended lanterns 3 mm 6 mm and 20 mm The controlused was saran and the study involved 12 plastic mesh bags and 4 control bags The sample size was 30 specimens perbag for a total of 480 oysters whose average initial dimension was 2 88 mm nbsp Results For all of the different mesh sizes tested there were significant differences with respect to the control which was the saran t student T lt 0 05 When comparing the growth in cm3 of the samples with respect to the diameter of the meshwork it was determined that there were significant differences Kruskall-Wallis 0 000468 p lt 0 05 The meshwith a diameter of 20 mm was the most efficient in oyster growth while saran was the least efficient nbsp Conclusions Regarding the increase in oyster meat weight it can be concluded that bags made of mesh with a larger diameter are more efficient than the use of saran due to t10