Dinoflagellates in shrimp culture ponds under typical production conditions.

A Acevedo-González,D A Siqueiros-Beltrones,I Gárate-Lizárraga

doi:10.37543/oceanides.v25i1.83

Abstract

During shrimp farming, look for diatoms to be phytoplankton preponderant; however, frequently Harmful algal blooms emerge, e.g. dinoflagellates. Our objective was to identify the dinoflagellate taxa present and those potentially harmful under typical production conditions in a shrimp farm. For this, samples were taken monthly (June-October 2003) background (microfitobenthos) and surface (drag). 46 dinoflagellate taxa were identified; the more frequent were Protoperidinium cf. pacificum, Scrippsiella trochoidea, Prorocentrum minimum, flower-forming taxa harmful; Likewise, potentially toxic taxa (Prorocentrum rhathymum, P. micans, Dinophysis caudata, D. triplets). In no case were there problems in the ponds. Dinoflagellates were less abundant at the end of the shrimp culture cycle.

Highlights

The role of phytoplankton in maintaining water quality of shrimp culture ponds is generally accepted, the consequences of its confinement and manipulation are largely unknown in terms of its structure, i.e., floristics, species diversity, and dominance
The changes in phytoplankton structure that could lead to the onset of harmful algal blooms (HAB) are still uncertain
Adding fertilizers promotes blooming of harmful non-toxic or toxic species (Delgado et al, 1996; Gárate-Lizárraga et al, 2004)

Summary

Introduction

The role of phytoplankton in maintaining water quality of shrimp culture ponds is generally accepted, the consequences of its confinement and manipulation are largely unknown in terms of its structure, i.e., floristics, species diversity, and dominance. Dinoflagellates in shrimp culture ponds under typical production conditions. These conditions and typical (desirable) phytoplankton in an adequate abundance have been described on the basis of spatial and temporal variations in species diversity of diatom assemblages found in culture ponds of a shrimp farm during a 24-week (June-October 2003) production cycle in the State of Sinaloa, Mexico (Acevedo-González, 2007).

Results

Conclusion