The effects of temperature and photoperiod on egg hatching success, egg production and population growth of the calanoid copepod, <i>Acartia grani</i>
 (Calanoida: Acartiidae)

Nogueira, Natacha; Sumares, Bernardo; Andrade, Carlos; Afonso, António

doi:10.1111/are.13437

Cited by 9 publications

(5 citation statements)

References 79 publications

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“…The natural light exposure during daytime could be different depending on the daily tropical weather condition. The effect could be different from the constant light condition and this might affect the reproduction as well [30]. Further investigation on photoperiod effect would give the answer.…”

Section: Discussionmentioning

confidence: 96%

Fatty Acid Composition in Cultured Amphiascoides neglectus (Copepoda: Harpacticoida)

Kassim¹,

Hamzah²,

Hashim³

et al. 2019

ESD

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This study investigates the effect of salinity on the fatty acid profile of a harpacticoid copepod Amphiascoides neglectus exposed to constant laboratory lighting and temperature (25-26 o C) at pH7 for 40 days. The results were compared with those cultured in the common open hatchery environment which is almost the same as in the natural ecosystem. Different fatty acid levels were determined using Gas Chromatography and Mass Spectrometry (GC-MS). Results showed that there were no significant differences (p>0.05) in fatty acid content for both 20ppt and 30ppt treatment but the percentage of EPA was higher in 20ppt. Harpacticoid copepods in the hatchery showed significantly (p<0.05) more fatty acids in 30ppt than 20ppt. EPA was also higher in harpacticoids cultured under 30ppt. Manipulation of salinity and temperature in combination of light factor for copepod rearing system could improve the deposition of fatty acids in their body.

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Section: Discussionmentioning

confidence: 96%

Fatty Acid Composition in Cultured Amphiascoides neglectus (Copepoda: Harpacticoida)

Kassim¹,

Hamzah²,

Hashim³

et al. 2019

ESD

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“…When interpreting the mechanisms linking diversity and environmental drivers, it must be recognized that temperature is an environmental parameter that influences the rates of development, respiration, hatching, mortality, and zooplankton distribution (Nogueira et al, 2018;Jo et al, 2019;Biard and Ohman, 2020). Oxygen concentration is a key factor influencing the growth, metabolic processes, and behavioral processes of various pelagic organisms (Ekau et al, 2010).…”

Section: Environmental Effectsmentioning

confidence: 99%

Revealing zooplankton diversity in the midnight zone

González,

Blanco-Bercial,

Escribano

et al. 2023

Front. Mar. Sci.

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Zooplankton diversity in the deep “midnight zone” (>1000 m), where sunlight does not reach, remains largely unknown. Uncovering such diversity has been challenging because of the major difficulties in sampling deep pelagic fauna and identifying many (unknown) species that belong to these complex swimmer assemblages. In this study, we evaluated zooplankton diversity using two taxonomic marker genes: mitochondrial cytochrome oxidase subunit 1 (COI) and nuclear 18S ribosomal RNA (18S). We collected samples from plankton net tows, ranging from the surface to a depth of 5000 m above the Atacama Trench in the Southeast Pacific. Our study aimed to assess the zooplankton diversity among layers from the upper 1000 m to the ultra-deep abyssopelagic zone to test the hypothesis of decreasing diversity with depth resulting from limited carbon sources. The results showed unique, highly vertically structured communities within the five depth strata sampled, with maximal species richness observed in the upper bathypelagic layer (1000–2000 m). The high species richness of zooplankton (>750 OTUS) at these depths was higher than that found in the upper 1000 m. The vertical diversity trend exhibited a pattern similar to the well-known vertical pattern described for the benthic system. However, a large part of this diversity was either unknown (>50%) or could not be assigned to any known species in current genetic diversity databases. DNA analysis showed that the Calanoid copepods, mostly represented by Subeucalanus monachus, the Euphausiacea, Euphausia mucronata, and the halocypridade, Paraconchoecia dasyophthalma, dominated the community. Water column temperature, dissolved oxygen, particulate carbon, and nitrogen appeared to be related to the observed vertical diversity pattern. Our findings revealed rich and little-known zooplankton diversity in the deep sea, emphasizing the importance of further exploration of this ecosystem to conserve and protect its unique biota.

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“…The monoculture protocol of these algal species has been applied in many studies. Laboratory-scale attempts to augment the production of copepods using algal culture media such as F/2 medium [ 40 ] have been used in culturing Bestiolina similis [ 41 ], Schmackeria poplesia [ 42 ], and A. grani [ 43 ]. The results were encouraging, but using the algal culture media would not be cost-effective for industrial-scale mass rearing of copepods [ 44 ].…”

Section: Introductionmentioning

confidence: 99%

Iron Fertilization Can Enhance the Mass Production of Copepod, Pseudodiaptomus annandalei, for Fish Aquaculture

Hong

Kuo

Tew

2023

Life

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Copepods are proven nutritious food sources for the mariculture/larviculture industry, however, unreliable methods for mass production of copepods are a major bottleneck. In this study, we modified a previously reported inorganic fertilization method (N: 700 μg L−1 and P: 100 μg L−1) by the addition of iron (Fe: 10 μg L−1, using FeSO4·7H2O) (+Fe treatment) and compared its suitability for copepod culture (Pseudodiaptomus annandalei) to the original method (control). The experiment was conducted outdoors in 1000 L tanks for 15 days. The addition of iron prolonged the growth phase of the phytoplankton and resulted in the production of significantly more small phytoplankton (0.45–20 μm, average 2.01 ± 0.52 vs. 9.03 ± 4.17 µg L−1 in control and +Fe, respectively) and adult copepods (control: 195 ± 35, +Fe: 431 ± 109 ind L−1), whereas copepodid-stage was similar between treatments (control: 511 ± 107 vs. +Fe: 502 ± 68 ind L−1). Although adding iron increased the cost of production by 23% compared to the control, the estimated net profit was 97% greater. We concluded that inorganic fertilization, with the addition of iron (Fe: 10 μg L−1), could be an effective method for the mass production of copepods for larviculture.

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The effects of temperature and photoperiod on egg hatching success, egg production and population growth of the calanoid copepod, Acartia grani (Calanoida: Acartiidae)

Cited by 9 publications

References 79 publications

Fatty Acid Composition in Cultured Amphiascoides neglectus (Copepoda: Harpacticoida)

Fatty Acid Composition in Cultured Amphiascoides neglectus (Copepoda: Harpacticoida)

Revealing zooplankton diversity in the midnight zone

Iron Fertilization Can Enhance the Mass Production of Copepod, Pseudodiaptomus annandalei, for Fish Aquaculture

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