Campos Verdecia, K. & J.R., Palomares García (2022). Egg production rate of Acartia clausi (Giesbrecht, 1889) in Bahía Concepción during an annual cycle. International Conference on Copepoda 2022. Londres, Reino Unido, julio 25 - 30, 2023, 113.
Karla Campos Verdecia y José Ricardo Palomares García 1
Copepods are one of the most important components of zooplankton in coastal waters and play major roles in the trophodynamics of marine ecosystems. The egg production rate (EPR) of Acartia (Acartiura) clausi was measured between March 2001 to March 2002. Seawater samples were obtained to determine the concentration of chlorophyll-a, fucoxanthin, peridinin, salinity and temperature in a 20 m water column, at one sampled station in the central region of Bahía Concepción. To estimate the EPR of A. clausi, collections were made with a simple conical net, taken in the morning to obtain live, active and undamaged copepods. During the study period, EPR were found to be generally low varying between 3.80 (May 2001) and 17.42 (February 2002) eggs/female.day. The mean EPR was recorded 7.81±1.65 eggs/female.day. A peak of Chl-a was obtained in the month of November 2001, related to temperatures above 25 °C, fucoxanthin behaved similarly, while peridinin had a peak in the month of February 2001, with a temperature of 17 °C approximately. EPR showed its highest values in the coldest months. The correlations performed to determine the effect of salinity, temperature and photosynthetic pigments on the egg production of A. clausi, showed the highest R2 value for perididine and a positive linear relationship for temperature.
Palabras clave: egg production; Gulf of California; copepod
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