TY - JOUR
T1 - Primeras mediciones de tasas de crecimiento de eufáusidos en el norte de la Corriente de Humboldt (23ºS)
AU - Riquelme-Bugueño, Ramiro
AU - Gómez-Gutiérrez, Jaime
AU - Escribano, Rubén
AU - Ruz, Paula
AU - Hidalgo, Pamela
AU - Schneider, Wolfgang
N1 - Publisher Copyright:
© 2016, Universidad de Valparaiso. All rights reserved.
PY - 2016/8
Y1 - 2016/8
N2 - One hundred and five juveniles and adults of Euphausia mucronata were incubated in order to estimate their daily growth rates (DGR) using the standard instantaneous growth rate method. From 77 krill that survived after 2 days of incubation under laboratory conditions, 70 individuals molted (35.1% males, 64.9% females). E. mucronata mean intermolt period was 5.2 days (range = 4-9 d) with mean DGR of 0.01 mm d-1 for males and -0.04 mm d-1 for females. Overall mean DGR was -0.02 mm d-1. DGRs were positive (31%), zero (12%) and negative (57%). DGR<0 evidenced body shrinking process suggesting that environmental conditions in austral autumn 2010 were unfavorable for the krill population. However, because females had DGR<0 values more frequently than males it is probable that females also used part of their energy on gonad development rather than body growth.
AB - One hundred and five juveniles and adults of Euphausia mucronata were incubated in order to estimate their daily growth rates (DGR) using the standard instantaneous growth rate method. From 77 krill that survived after 2 days of incubation under laboratory conditions, 70 individuals molted (35.1% males, 64.9% females). E. mucronata mean intermolt period was 5.2 days (range = 4-9 d) with mean DGR of 0.01 mm d-1 for males and -0.04 mm d-1 for females. Overall mean DGR was -0.02 mm d-1. DGRs were positive (31%), zero (12%) and negative (57%). DGR<0 evidenced body shrinking process suggesting that environmental conditions in austral autumn 2010 were unfavorable for the krill population. However, because females had DGR<0 values more frequently than males it is probable that females also used part of their energy on gonad development rather than body growth.
KW - Bahía Mejillones
KW - Chile
KW - Euphausia mucronata
KW - Intermolt period
KW - Southeastern Pacific
UR - http://www.scopus.com/inward/record.url?scp=84981318552&partnerID=8YFLogxK
U2 - 10.4067/S0718-19572016000200020
DO - 10.4067/S0718-19572016000200020
M3 - Artículo
SN - 0717-3326
VL - 51
SP - 435
EP - 440
JO - Revista de Biologia Marina y Oceanografia
JF - Revista de Biologia Marina y Oceanografia
IS - 2
ER -