Dietary effects on egg production, egg-hatching rate and female life span of the tropical calanoid copepodAcartia bilobata

Abstract

Copepods are crucial source of live feeds in the aquaculture industry. In particular, several species of the genus Acartia are considered optimal prey for fish larvae. The species Acartia bilobata has excellent potential for marine larvae culture, as it is easy for mass culture. This study investigated the effects of various algal diets on the egg production and egg-hatching rate of A. bilobata. The results indicated that the single-species diet Isochrysis galbana was the most supportive diet for A. bilobata egg production and female life span in all treatments (egg production: 23.85 AE 0.70 eggs female À1 day À1 and female life span: 18.00 AE 1.45 days). Nannochloropsis oculata and Tetraselmis chui treatments gave markedly lower egg production and female life span as both singlespecies and multiple-species diets. For the egg hatching-rate experiment, except for the T. chui treatment, which yielded a considerably lower hatching rate than the other diets, the hatching rate was only slightly affected by the algal diets. These results confirm that A. bilobata, a tropical brackish-water copepod species, develops rapidly at 28°C and can produce a large number of eggs; therefore, it has considerable potential for larvae culture.

Dormant eggs of a calanoid copepod from tropical brackish aquaculture ponds

“…Particulariy the freely spawning copepod Acartia bilobata is an emerging species of high potential for aquaculture (Pan et al, 2013) and can be studied extensively in the future under controlled conditions (i.e., laboratory), as well as in aquaculture ponds.…”

Egg hatching rate and fatty acid composition of Acartia bilobata (Calanoida, Copepoda) across cold storage durations

“…Beyrend‐Dur, Dur, Souissi and Hwang () were the first to report that the eggs (unidentified type) of the tropical calanoid copepod, Acartia bilobata , collected from sediments of a brackish aquaculture pond in southern Taiwan remain viable after cold storage. This species has great aquaculture potential because of their high productivity (Pan et al., ), and the feasibility of a quiescent cold‐induction protocol was preliminarily examined (Pan, Souissi, Hwang & Souissi, ). In order to better evaluate the potential of A. bilobata cold‐stored eggs for aquaculture applications, we performed the present study for the following objectives: (a) to identify dormant egg types produced by A. bilobata and their patterns of hatchability after different cold storage durations, (b) to examine the fatty acid profiles of the cold‐stored eggs after different storage durations.…”

Comparative study on the effects of two diatoms as diets on planktonic calanoid and benthic harpacticoid copepods

“…The aim of the investigation was to directly compare the effects of diatoms on pelagic calanoid and benthic harpacticoid copepod because past research on different responses of copepods to diatoms largely came from separate research (Carotenuto et al., ; Ceballos & Ianora, ; Matias‐Peralta, Yusoff, Shariff, & Mohamed, ), hence could not rule out differences in other factors, such as culture conditions and algae quality, contributed to the different outcomes. Because the golden‐brown microalgae Isochrysis galbana belonging to Haptophytes is well known as an excellent food for most marine copepods (Chen, Wang, Wu, & Jia, ; Dhanker et al., ; Pan et al., ), the species was also used for feeding the three copepods and served as the control.…”