Effect of salinity on somatic growth and gonadal enhancement of the sea urchin Paracentrotus lividus (Lamarck, 1816)

Santos, Pedro; Silva, João A.; Costa, José Lino; Pombo, Ana

doi:10.1016/j.aquaculture.2022.738593

Cited by 6 publications

(1 citation statement)

References 70 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The increase of salinity was moderately correlated with the decrease of DO in the RAS tank 1, while in the RAS tank 2 the salinity was moderately correlated with the increase of NH 4 , NO 2 , and PO 4 . Considering its ecological adaptations, P. lividus has a considerable tolerance for salinity variations ( Santos et al, 2022 ), but salinity increases can also lead to alteration in the microbial community influencing nitrification and denitrification processes ( Xia et al, 2019 ). Dissolved oxygen is a crucial variable as well.…”

Section: Discussionmentioning

confidence: 99%

Morphologic and genic effects of waste pollution on the reproductive physiology of Paracentrotus lividus lmk: a mesocosm experiment

et al. 2023

View full text Add to dashboard Cite

A considerable amount of coastal contamination is caused by wastes deriving from household and the degradation and the metabolism of plants and animals, even if our attention is commonly focused on industrial pollutants and contaminants. Waste pollutants are mainly represented by highly diluted soluble compounds and particles deriving from dead organisms. This complex combination, consisting of suspended particles and dissolved nutrients, has a significant impact on coastal planktonic and benthic organisms, also playing an active role in the global cycles of carbon. In addition, production practices are nowadays shifting towards recirculated aquaculture systems (RAS) and the genic responses of target organisms to the pollution deriving from animal metabolism are still scarcely addressed by scientific investigations. The reservoir of organic matter dissolved in the seawater is by far the least understood if compared to that on land, cause only a few compounds have been identified and their impacts on animals and plants are poorly understood. The tendency of these compounds to concentrate at interfaces facilitates the absorption of dissolved organic compound (DOC) onto suspended particles. Some DOC components are chemically combined with dissolved metals and form complexes, affecting the chemical properties of the seawater and the life of the coastal biota. In this research, we compared the reproductive performances of the common sea urchin Paracentrotus lividus cultured in open-cycle tanks to those cultured in a recirculating aquaculture system (RAS), where pollution progressively increased during the experiment due to animal escretions. Sea urchins were cultured for 7 months under these two conditions and their gametes were collected. Embryos resulting by in vitro fertilization were analyzed by Real Time qPCR to identify possible effects of pollution-induced stress. The fertility of sea urchins was evaluated, as well as the gonadosomatic indices and the histological features of gonads. Our results indicate that pollution due to excess of nutrients, event at sub-lethal concentrations, may hardly impact the reproductive potential of this key species and that chronic effects of stress are revealed by the analyses of survival rates and gene expression.

show abstract

Section: Discussionmentioning

confidence: 99%