info:eu-repo/semantics/article
The influence of density on survival and larval development in the sea urchin arbacia dufresnii (Echinodermata: Echinoidea)
Influencia de la densidad en la supervivencia y el desarrollo larvario del erizo de mar arbacia dufresnii (Echinodermata: echinoidea)
Fecha
2021-03Registro en:
Chaar, Florencia Belén; Fernandez, Jimena Pía; Sepúlveda, Lucas Roberto; Rubilar Panasiuk, Cynthia Tamara; The influence of density on survival and larval development in the sea urchin arbacia dufresnii (Echinodermata: Echinoidea); Revista de Biología Tropical; Revista de Biología Tropical; 69; 3-2021; 334-345
0034-7744
CONICET Digital
CONICET
Autor
Chaar, Florencia Belén
Fernandez, Jimena Pía
Sepúlveda, Lucas Roberto
Rubilar Panasiuk, Cynthia Tamara
Resumen
Density is one of the critical factors in echinoderm larvae for aquaculture purposes. Echinoplutei larvae are very sensitive to overcrowding. High culture density can lead to problems with bacteria or protozoa, decreasing survival and generating abnormal morphotypes. Objective: To evaluate the effect of culture density on survival and larval growth in the sea urchin Arbacia dufresnii. Methods: Two days after fertilization of A. dufresnii we we kept treatments at 1, 3, 5 and 10 larvae.ml-1, with three replicates each. We recorded survival and abnormal morphotypes periodically, as well as growth:somatic rod length, total length, and length of the post oral arms,. we applied generalized linear models. Results: Survival is dependent on density, time and replicates, and their interactions. Larval growth depended on density and time, also with interaction between the variables. The treatment of 5 larvae.ml-1 had the highest survival and larval condition. Conclusions: Larval culture of A. dufresnii had the best results at 5 larvae.ml-1.