First description of Patagonian scallop (Zygochlamys patagonica) early larval development

Authors

  • Matías Schwartz Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP)
  • Silvana Campodónico Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP)

DOI:

https://doi.org/10.47193/mafis.3222019121903

Keywords:

Larvae, development, Patagonian scallop, Argentina

Abstract

Description of Patagonian scallop (Zygochlamys patagonica) early larval development observed in the 2015 and 2017 Summer seasons spawning was made. Spawning was obtained through induction with the valval cleaning and thermal shocks (7 and 13° C) techniques in 16 adult scallops 55-72 mm shell height, sexually mature and in equal sex proportion. The water of the induction vessels was filtered with a 35 mm sieve to retain the fertilized oocytes that were placed in 2 l containers with ocean water at 7 ± 0,5 °C and without aeration. Early development stages up to trochophore larva were observed and measured and the duration of each phase and type of movement registered. The embryonic development was completed with the gastrula stage 30-40 h post fertilization. The trochophore larva phase started at 80-84 h, stage during which total mortality of larvae occurred. Although Z. patagonica life cycle was not completed, this work constitutes the first registry of the species early larval development, necessary to know the time the larva spends in the water column and, thus, its dispersion capacity.

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Published

2020-12-11

How to Cite

1.
Schwartz M, Campodónico S. First description of Patagonian scallop (Zygochlamys patagonica) early larval development. Mar Fish Sci [Internet]. 2020Dec.11 [cited 2021Sep.17];32(2):115-24. Available from: https://ojs.inidep.edu.ar/index.php/mafis/article/view/123

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Section

Section: Benthic Mollusk Fisheries

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