Feeding rates and gross growth efficiencies of larval developmental stages of Oithona davisae (Copepoda, Cyclopoida)

Almeda, Rodrigo; Augustin, Christina B.; Alcaraz, Miquel; Calbet, Albert; Saiz, Enric

doi:10.1016/j.jembe.2010.03.002

Cited by 66 publications

(71 citation statements)

References 79 publications

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“…These results corroborate those found by ALMEDA et al (2010), who reported growth rates in O. davisae positively related to food concentration and temperature. The mean temperature in this experiment (25.5 ± 0.5 ºC) is in agreement with HERNÁNDEZ MOLEJÓN and ALVAREZ-LAJONCHÈRE (2003), showing increased feeding rates of nauplii, and, consequently, an increase in the O. hebes population.…”

Section: Discussionsupporting

confidence: 92%

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Use of the copepod Oithona hebes as a bioencapsulator of essential fatty acids

et al. 2015

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The advantages of using copepods in aquaculture include nutritional superiority, high digestibility and broad spectrum of sizes, with the possibility of bioencapsulation of nutrients, probiotics and medicines. This study aimed to compare the effects of feeding copepods with a microalgae diet and two commercial inert diets on the copepod culture performance and their fatty acid profile. Wild copepods were collected in the estuarine system of Piraquê-açu River, Aracruz, Espírito Santo, Brazil, with a conical net of 60 cm in diameter and 200 μm mesh with a blind cup end, towed through the subsurface layer at a speed of 1 knot for 5 minutes. Once collected, the material was sieved in order to select only Oithona hebes. The experiment was conducted in nine cylindrical-conical tanks with a 60 L capacity, salinity of 25.8 ± 1.3, temperature of 25.5 ± 0.5 ºC and weak aeration, stocked with a density of 1.5 copepod/mL. Treatments were made in triplicate and consisted of: Treatment 1 (Control) fed with microalgae Chaetoceros gracilis and Nannochloropsis oculata (1:1) with 50,000 cells.mL-1each; Treatment 2 with S.Parkle® INVE (1g.million-1); and Treatment 3 with freeze-dried spirulina (1g.million-1). The mean final population was compared by a Tukey test (p < 0.05). Results showed higher population growth for copepods treated with S.parkle, which was the only treatment that presented copepodites. S.parkle was a good source of total lipids (9.54 g.100g-1 dry weight), high availability of DHA, EPA and had a good DHA:EPA:ARA ratio of 12.4:3.4:1.0. Copepods that were fed S.parkle had the highest DHA levels and a DHA:EPA:ARA ratio of 15.4:2.2:1.0. This study showed that S.parkle is a good inert food for rearing the copepod O. hebes, demonstrating the ability of copepods to bioencapsulate nutrients, allowing their transfer in the food chain.

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Section: Discussionsupporting

confidence: 92%

“…Among marine copepods, cyclopoids of the Oithona genus are considered the most abundant and ubiquitous copepods in the world's oceans (ALMEDA et al, 2010). Besides, they adapt to laboratory rearing, as observed for O. hebes in the current study, which showed good results in survival, quantity of egg-bearing females and nauplii production.…”

Section: Discussionsupporting

confidence: 61%

Use of the copepod Oithona hebes as a bioencapsulator of essential fatty acids

et al. 2015

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“…Almeda et al (2010) reported maximum specific ingestion rates of , 85% d 21 for N4-N5 stages of O. davisae fed on the heterotrophic dinoflagellate O. marina; our estimate for N5 O. davisae was , 1.7% d 21 fed on T. pseudonana and , 90% d 21 on T. suecica.…”

Section: Discussionmentioning

confidence: 45%

Feeding capabilities and limitations in the nauplii of two pelagic estuarine copepods, Pseudodiaptomus marinus and Oithona davisae

Vogt

Ignoffo

Sullivan

et al. 2013

Limnology & Oceanography

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In most aquatic ecosystems, copepod nauplii outnumber all other mesozooplankton. Although thousands of studies have examined feeding by later life history stages, the feeding habits of nauplii are poorly known. We offered conspecific adult and naupliar stages of the current-feeding calanoid copepod Pseudodiaptomus marinus and the ambush-feeding cyclopoid copepod Oithona davisae 14 species of phytoplankton from various functional and taxonomic groups that spanned a wide size range. Using a novel epifluorescence microscopy method, we calculated an index of gut pigment for copepods fed each phytoplankton species. We also measured adult and naupliar feeding rates on three species of phytoplankton: the cryptomonad Rhodomonas salina, the prasinophyte Tetraselmis suecica, and the diatom Thalassiosira pseudonana, by an improved gut fluorescence method using a microplate reader. Despite their smaller size, weaker swimming and sensory capabilities, and rudimentary feeding apparatus, nauplii fed on a large range of cell sizes and were capable of consuming many of the same phytoplankton as adults.

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“…Copepods were classified to adult and copepodite life stages, abundant calanoid nauplii were identified to species, and the remaining were lumped together in a separate group. Micro-and mesozooplankton densities were converted to dry weight from literature-derived weight-length regressions (Dumont et al 1975;Lonsdale and Coull 1977;Durbin and Durbin 1978;Pauli 1989;Kimmerer 2006;Almeda et al 2010) or direct measurements of dry weight and assuming a carbon-to-dry weight ratio of 42% for copepods and 45% for the remaining taxa. Mysid size was measured for 100 (or maximum available if <100) randomly picked individuals per sampling date and dry weight estimated from length-weight regression equations obtained for Neomysis mercedis and Acanthomysis bowmani (unpublished results from J. Orsi, California Department of Fish and Game, Stockton).…”

Section: Zooplanktonmentioning

confidence: 99%

Shifts in Zooplankton Community Structure: Implications for Food Web Processes in the Upper San Francisco Estuary

Winder

Jassby

2010

Estuaries and Coasts

120

136

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Zooplankton are an important trophic link and a key food source for many larval fish species in estuarine ecosystems. The present study documents temporal and spatial zooplankton dynamics in Suisun Bay and the Sacramento-San Joaquin Delta-the landward portion of the San Francisco Estuary (California, USA)-over a 37-year period . The zooplankton community experienced major changes in species composition, largely associated with direct and indirect effects of introductions of non-native bivalve and zooplankton species. A major clam invasion and many subsequent changes in zooplankton abundance and composition coincided with an extended drought and accompanying low-flow/high-salinity conditions during 1987-1994. In the downstream mesohaline region, the historically abundant calanoid copepods and rotifers have declined significantly, but their biomass has been compensated to some extent by the introduced cyclopoid Limnothoina tetraspina. The more upstream estuary has also experienced long-term declining biomass trends, particularly of cladocerans and rotifers, although calanoid copepods have increased since the early 1990s due to the introduced Pseudodiaptomus spp. In addition, mysid biomass has dropped significantly throughout the estuary. Shifts in zooplankton species composition have also been accompanied by an observed decrease in mean zooplankton size and an inferred decrease in zooplankton food quality. These changes in the biomass, size, and possibly chemical composition of the zooplankton community imply major alterations in pelagic food web processes, including a drop in prey quantity and quality for foraging fish and an increase in the importance of the microbial food web for higher trophic levels.

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Feeding rates and gross growth efficiencies of larval developmental stages of Oithona davisae (Copepoda, Cyclopoida)

Cited by 66 publications

References 79 publications

Use of the copepod Oithona hebes as a bioencapsulator of essential fatty acids

Use of the copepod Oithona hebes as a bioencapsulator of essential fatty acids

Feeding capabilities and limitations in the nauplii of two pelagic estuarine copepods, Pseudodiaptomus marinus and Oithona davisae

Shifts in Zooplankton Community Structure: Implications for Food Web Processes in the Upper San Francisco Estuary

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