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Zootecnia Tropical
Instituto Nacional de Investigaciones Agrícolas Venezuela
ISSN: 0798-7269
Vol. 24, No. 2, 2006, pp. 193-203 		Bioline Code: zt06016
Full paper language: English
Document type: Research Article
Document available free of charge

Zootecnia Tropical, Vol. 24, No. 2, 2006, pp. 193-203

 en Effect of microalgae size on the ingestion rate on larvae of Artemia franciscana check for this species in other resources (Kellog, 1906)
Arnulfo H. Díaz, Alejandro Ramírez Ayvar, Daniel Godínez Siordia y Carmen Gallo García

Abstract

The effect of the size of the microalgae Chaetoceros muelleri check for this species in other resources and Tetraselmis suecica check for this species in other resources on the ingestion rate of larvae of Artemia franciscana check for this species in other resources was evaluated. From the beginning of the experiment significant differences were observed (P<0.05) at all stages of development among the treatments. In all stages of the larvae there was observed an increase in the rate of ingestion relative to the concentration of C. muelleri. In the transition stage from metanauplii IV to postmetanauplii II, A. franciscana managed to ingest 3.5 times more diatom than the phytoflagelate algae; behavior that disappeared at the end of the postmetanauplii IV stage when they have in a equal relationship of 1 to 1.

Keywords
Ingestion rate, Artemia franciscana, microalgae.

 
 es Efecto del tamaño de las microalgas sobre la tasa de ingestiín en larvas de Artemia franciscana check for this species in other resources (Kellog, 1906)
Arnulfo H. Díaz, Alejandro Ramírez Ayvar, Daniel Godínez Siordia y Carmen Gallo García

Resumen

Se valorí el efecto que representa el tamaño de las microalgas Chaetoceros muelleri check for this species in other resources y Tetraselmis suecica sobre la tasa de ingestiín de larvas de Artemia franciscana check for this species in other resources . Desde el inicio del ensayo se observaron diferencias significativas (P<0,05) en todos los estadios de desarrollo y los tratamientos evaluados. En todos los estadios larvales se presentí un incremento de la tasa de ingestiín en relaciín la concentraciín de Chaetoceros muelleri. En la etapa de transiciín de metanauplio IV a postmetanauplio II, Artemia franciscana alcanzí a ingerir 3,5 veces más la diatomea que la microalga fitoflagelada. Este comportamiento desaparecií hacia el final de la etapa de postmetanauplio IV, cuando fue similar la tasa de ingestiín de ambas especies de microalgas.

Palabras-clave
Tasa de ingestiín, Artemia franciscana, microalgas.

 
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