franja-sup-Home franja-sup-UV

EspañolEnglish

Volume 43 - Number 1 - 2008
Artículo


Temperature effect in the embryonic and larval development of the mussel, Mytilus galloprovincialis (Lamarck, 1819)

Maryori Ruiz1,2, Eduardo Tarifeño2,3, Alejandra Llanos-Rivera3, Christa Padget3 y Bernardita Campos4

 

1 Programa de Magíster en Ciencias, Departamento Zoología, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción. Casilla 160-C, Concepción, Chile
2 Departamento de Zoología, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción. Casilla 160-C, Concepción, Chile
3 Grupo ProMytilus. Proyecto FONDEF D03-1095, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Chile
4 Facultad de Ciencias del Mar y de Recursos Naturales, Universidad de Valparaíso, Valparaíso, Chile. Casilla 5080, Reñaca, Viña del Mar, Chile

 

E-mail:  etarifen@udec.cl


The Mediterranean mussel (Mytilus galloprovincialis Lamarck, 1819) has been recently registered for the Chilean coast, from Concepcion (36ºS) to the Magellan Strait (54ºS). To determine the feasibility of the massive culture of M. galloprovincialis in Chile, a study of the temperature effects on the early development was carried out. Embryos and larvae were raised at 12, 16 and 20ºC in laboratory facilities at Coliumo Bay (36ºS), Chile, from where adults mussels were collected. Embryonic development followed the common sequence exhibited by other bivalves. Trocophores turned into veligers at 45 h post fertilization, followed by D-larvae (99 ± 6 µm length, initial size), with a large ciliated velum, a well-developed stomach and concentric growth lines in the shell; 15 days post-fertilization, umbonate larvae developed eye-spots and adductors muscles; pediveliger larvae (265 ± 2 µm initial length size) developed a pedal organ and gill filaments. Both embryonic and larval stages were accelerated at higher temperatures. The larval growth rates at 20ºC (9.1 µm*d-1) were significantly larger than at 12 and 16ºC (6.7 µm*d-1 and 7.4 µm*d-1, respectively). In comparison with Mytilus chilensis, M. galloprovincialis showed better growth rates at the same temperatures. This fact suggests that in Chile M. galloprovincialis seed can be produced under controlled conditions for its massive cultivation.

 

Key words: Mytilidae, mussel, embryo, larvae, temperature, growth rate

 

pdficon-rbmoDownload

 

1Laboratorio de Zooplancton, Instituto de Ciencias del Mar y Limnología,Universidad Nacional Autónoma de México. A. P. 70-305, 04510 México, D. F. México
 
atasehir evden eve nakliyat avcilar evden eve nakliyat umraniye evden eve nakliyat beylikduzu evden eve nakliyat sisli evden eve nakliyat bahcelievler evden eve nakliyat