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© 2024 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

Protoceratium reticulatum, a dinoflagellate species known for producing yessotoxins (YTX), can form harmful algal blooms (HABs) impacting marine life. This study examined how P. reticulatum influenced the physiological rates and affected the tissue health of juvenile scallops, Argopecten purpuratus. The scallops were exposed to non-toxic algae Isochrysis galbana (diet A) and mixtures where 30 and 70% of the non-toxic algae were replaced by the toxic algae P. reticulatum (diet B and C, respectively) for 15 days, followed by a 15-day recovery period (I. galbana). Results showed that the clearance rate (CR), inorganic ingestion rate (IIR), organic ingestion rate (OIR), and absorption rate (AR) were significantly reduced within the first seven days of exposure to toxic diets, with reductions of approximately 25% and 50% in diets B and C, respectively, compared to the non-toxic diet, and an increase in these parameters during the recovery stage. Histological observations revealed greater tissue damage in the digestive gland than in the gills, with a higher frequency of scallops with severe damage correlating with higher toxic diet content. Despite no direct impact on survival, the compromised physiological health of A. purpuratus juveniles suggests increased vulnerability to other stressors. These findings provide new insights into the filter-feeding behavior and selective filtration capabilities of scallops in the presence of toxic dinoflagellates and how scallops health can be compromised, contributing to the understanding of how HABs and associated toxins affect A. purpuratus.

Details

Title
Effects of the Toxic Dinoflagellate Protoceratium reticulatum on Physiological Rates of Juvenile Scallops Argopecten purpuratus
Author
Nieves, María Gabriela 1   VIAFID ORCID Logo  ; Alvarez, Gonzalo 2   VIAFID ORCID Logo  ; López-Carvallo, Jesús Antonio 3   VIAFID ORCID Logo  ; Millanao, Paulina 3 ; Araya, Michael 4   VIAFID ORCID Logo  ; Díaz, Rosario 3 ; Díaz, Patricio A 5   VIAFID ORCID Logo 

 Programa de Doctorado en Acuicultura, Pontificia Universidad Católica de Valparaíso, Valparaíso 2340025, Chile; [email protected] 
 Departamento de Acuicultura, Universidad Católica del Norte, Coquimbo 1281, Chile; [email protected] (J.A.L.-C.); [email protected] (P.M.); [email protected] (R.D.); Centro de Investigación y Desarrollo Tecnológico en Algas (CIDTA), Facultad de Ciencias del Mar, Universidad Católica del Norte, Larrondo 1281, Coquimbo, Chile; [email protected]; Center for Ecology and Sustainable Management of Oceanic Islands (ESMOI), Departamento de Biología Marina, Facultad de Ciencias del Mar, Universidad Católica del Norte, Coquimbo 1781421, Chile; Centro de Innovación Acuícola AQUAPACIFICO, Larrondo 1281, Coquimbo, Chile 
 Departamento de Acuicultura, Universidad Católica del Norte, Coquimbo 1281, Chile; [email protected] (J.A.L.-C.); [email protected] (P.M.); [email protected] (R.D.) 
 Centro de Investigación y Desarrollo Tecnológico en Algas (CIDTA), Facultad de Ciencias del Mar, Universidad Católica del Norte, Larrondo 1281, Coquimbo, Chile; [email protected] 
 Centro i~mar & CeBiB, Universidad de Los Lagos, Casilla 557, Puerto Montt, Chile; [email protected] 
First page
331
Publication year
2024
Publication date
2024
Publisher
MDPI AG
e-ISSN
24103888
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
3110465024
Copyright
© 2024 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.