Identificación de cianobacterias en piscinas de cultivo de camarón (Penaeus vannamei) en un sector del estuario del río Chone y río Jama

Abstract

Cyanobacteria also known as cyanophyceas, blue-green algae or cyanoprocaryotes, are the most relevant group of photosynthetic prokaryotes in diversity and biomass. In order to identify cyanobacteria in shrimp farms (Penaeus vannamei) and wáter supply channels in a sector of the Chone river estuary and Jama River, samples were collected from two seasons during november 2017 to november 2018, for which the identification and quantification of phytoplankton was carried out, as well as the determination of environmental parameters of the water. Five cyanobacterial species were identified for both ecosystems: Cylindrospermopsis raciborskii, Dolichospermum sp., Phormidium sp., Leptolyngbya sp. and Pseudoanabaena sp., being Leptolyngbya sp. the most abundant species in both estuaries. The values of the Shannon-Wiener diversity index in these two estuaries were less than 1.5 (1.10 and 0.99) indicating a low diversity respectively. The environmental parameters of the water were similar during the study months and estuaries except for the temperature where there was a significant difference. The results of this study provide new knowledge about this group of microalgae in the two monitored ecosystems.