Biological control of incrusting organisms and sediments in Chilean oyster cultures.

Juan Barile,Gimena Rivas,Patricio De Los Ríos-Escalante,Rolando Vega

doi:10.1590/1519-6984.236182

Abstract

The oyster culture has the incrusting organism as problem for production, in this context, it evaluated as biological control against incrusting organism and sediments the introduction of gastropod Tegula atra (Lesson, 1830) in Chilean oysters (Triostrea chilensis Phillippi, 1844) cultures in conditions of starvation presence and absence located in floating cages and bottom cultures. The predation and mechanic effect on T. atra grazing generated a decreasing in seven days of 19.8% and 13.7% of incrusting organisms in cage culture and bottom sediments by effects of gastropods without starvation respectively. Whereas it had a decrease of 12.6% and 11.4% of incrusting organisms in cage culture and bottom sediments by effects of gastropods with starvation respectively. The incrusting organism removed were mainly algae, colonial ascidia, polychaeta, bryozoan and small crustaceans.

Highlights

One of the main limitant factors in oyster culture is the presence of incrusting organism and sedimends in cultured species and their respective culture systems (Arakawa, 1990; Guenther et al, 2006; Kishore and Southgate, 2016; Sievers et al, 2017)
The oyster culture has problems due the incrusting organism and sediments depletion and physic-chemical and biological prevention procedures (Sievers et al, 2017), such as natural control in example predators (Lodeiros and García, 2004) that would have interesting projection in shellfish farmings, because these procedures would not generate environmental pollution, that is a disadvantage if it is used physic-chemical methods, and it is a cheap method in comparison to hand extraction (Lodeiros et al, 2018)
It is necessary the control procedures against incrusting organism and sediments that affect the oyster culture in Chile, in this context, the aim of the present study is analyse the capacity of gastropod Tegula atra (Lesson, 1830) as potential biological control considering their herbivore diet (Viviani, 1975), that it does not has predator or competitor for cultured oysters, and it has

Summary

Introduction

The oyster culture has problems due the incrusting organism and sediments depletion and physic-chemical and biological prevention procedures (Sievers et al, 2017), such as natural control in example predators (Lodeiros and García, 2004) that would have interesting projection in shellfish farmings, because these procedures would not generate environmental pollution, that is a disadvantage if it is used physic-chemical methods, and it is a cheap method in comparison to hand extraction (Lodeiros et al, 2018) It is necessary the control procedures against incrusting organism and sediments that affect the oyster culture in Chile, in this context, the aim of the present study is analyse the capacity of gastropod Tegula atra (Lesson, 1830) as potential biological control considering their herbivore diet (Viviani, 1975), that it does not has predator or competitor for cultured oysters, and it has.

Objectives

Methods

Results