Egg production, growth and development of the cyclopoid copepod Oithona similis

Sabatini, Marina Elena; Kiørboe, Thomas

doi:10.1093/plankt/16.10.1329

Cited by 206 publications

(150 citation statements)

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“…In these subsamples, the trunk length (appendicularians), prosome length (calanoids and cyclopoids) and cephalothorax length (nauplii) were measured and extrapolated to the total sample. Using these sizes, the biomass (mg C m -3 ) of each individual was estimated using the relationships described in Sabatini and Kiørboe (1994), Capitanio et al (2008) and Jasper et al (2009), and then extrapolated to the biomass of each group.…”

Section: Methodsmentioning

confidence: 99%

Potential zooplankton preys (Copepoda and Appendicularia) for Engraulis anchoita in relation to early larval and spawning distributions in the Patagonian frontal system (SW Atlantic Ocean)

et al. 2011

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SUMMARY:We investigated the spatial distribution of the abundance, biomass and size of zooplankton (nauplii, calanoids, cyclopoids and appendicularians) in relation to the distribution of first-feeding larvae and eggs of Engraulis anchoita across the frontal system of Peninsula Valdés. Twelve samples of zooplankton and ichthyoplankton were taken with small Bongo (67 µm) and Pairovet (200 µm) nets during the spring of 2004 along two transects. The total abundance of zooplankton and the chlorophyll a concentration were higher in homogeneous waters, while total biomasses were higher in stratified waters. Temperature was negatively correlated with biological variables and was the main factor affecting the zooplankton distribution. In both transects, abundance peaks of first-feeding larvae were detected at coastal stations along with the smallest fraction of zooplankton (<500 µm), while the largest fraction was dominant at the external stations, coinciding with the highest egg abundance. The physical structure of this front generates different levels of food availability for first-feeding larvae. Calanoids (southern transect) and cyclopoids (northern transect) are predominant followed by nauplii and appendicularians. The biomass of zooplankton preys contributes to the carbon transfer to the upper trophic levels and is probably important for the survival and growth of anchovy larvae in this frontal system. Keywords: southwestern Atlantic Ocean, North Patagonian frontal system, copepods, appendicularians, zooplanktonanchovy linkage.RESUMEN: Potenciales presas zooplanctónicas (Copepoda y Appendicularia) para Engraulis anchoita en relación con las distribuciones de larvas tempranas y de desove en la región frontal patagónica (océano Atlán-tico sudoccidental). -Se investigó la distribución espacial de la abundancia, biomasa y las tallas del zooplancton (nauplii, calanoideos, ciclopoideos y apendicularias) en relación con la distribución de las larvas en estadio de primera alimentación y los huevos de Engraulis anchoita en el sistema frontal de Península Valdés. Se tomaron 12 muestras de zooplancton e ictioplancton durante la primavera de 2004 a lo largo de dos transectos, mediante una red Minibongo (67 µm) y una Pairovet (200 µm) respectivamente. La abundancia total del zooplancton y la concentración de clorofila fue mayor en aguas homogéneas, mientras que la biomasa fue mayor en aguas estratificadas. La temperatura se correlacionó negativamente con las variables biológicas siendo ésta el principal factor que afectó la distribución del zooplancton. En las estaciones costeras de ambos transectos, se encontró la mayor abundancia de larvas en coincidencia con la fracción más pequeña de zooplancton (<500 µm), mientras que la fracción más grande fue dominante en las estaciones externas, en coincidencia con la mayor abundancia de huevos. La estructura física de este frente genera diferente disponibilidad de alimento para las larvas siendo los calanoideos (transecto sur) y los ciclopoideos (transecto norte) predominantes, seguid...

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Section: Methodsmentioning

confidence: 99%

Potential zooplankton preys (Copepoda and Appendicularia) for Engraulis anchoita in relation to early larval and spawning distributions in the Patagonian frontal system (SW Atlantic Ocean)

et al. 2011

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“…The resultant equations are then applied to seasonal data of in situ temperature and egg-adult abundance (e.g., Uye and Sano 1995). Similarly, relationships of hatching rate and temperature derived in one location are applied to research on the same species but at different times or locations (e.g., Sabatini and Kiørboe 1994). We include such measurements, although we appreciate this may not be the ideal approach since it could cause some biases.…”

Section: Speciesmentioning

confidence: 99%

“…4). Indeed, in temperate systems greater variability has been observed in the fecundity of broadcasters than sac spawners both temporally (e.g., Frost 1985;Kiørboe and Nielsen 1994;Sabatini and Kiørboe 1994) and spatially (e.g., Nielsen and Sabatini 1996). Small sac-spawning cyclopoids have been found to maintain constantly high rates of fecundity and growth in low-Chl a conditions .…”

mentioning

confidence: 99%

Growth of marine planktonic copepods: Global rates and patterns in relation to chlorophyll a, temperature, and body weight

Hirst

Bunker

2003

Limnology & Oceanography

322

265

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We compiled a global data set of copepod in situ weight-specific fecundity and growth rates, together with measurements of their body weights, and the chlorophyll a and temperature of the natural water in which these animals were growing. Juveniles can achieve half-saturation of their growth (K m ) at chlorophyll a concentrations almost an order of magnitude lower than adult females can their weight-specific fecundity. Adult weight-specific fecundity rates in situ are correlated with temperature, but the Q 10 s of 1.59 and 1.43 in broadcast and sac spawners, respectively, are much lower than under food saturated laboratory conditions (Q 10 s of 2.75 and 3.98). By comparing the in situ and laboratory food saturated results we are able to assess food limitation in the environment. The degree of food limitation increases with increasing temperature for adults; in situ rates approximate food saturated rates at low temperatures (0-10ЊC), at 25ЊC they are on average only about one-fifth of those at food saturation. By contrast, in situ juvenile rates are more strongly temperature-dependent than their adults and close to food saturation even at high temperatures. Juveniles grow much more rapidly and closer to food saturation than do adults of a similar size. There are several possible reasons for this. Compounds needed for egg production may simply be more dilute than those used in somatic growth. However, it is also possible that food limitation acts very differently in adults than juveniles. Molting rates in juveniles are strongly temperature dictated, and if sufficient weight is not added between molts, these slower growing juveniles do not survive. Adults, by contrast, can survive for long periods without having sufficient food to produce eggs.Copepods are the dominant mesozooplankton in the marine environment, comprising as much as 80% of its total biomass (Kiørboe 1998). They are important grazers of phytoplankton and microzooplankton (Atkinson 1996) and form a major trophic link to many predatory invertebrates and fish. Copepods also play a fundamental role in the upper ocean-exporting, redistributing, and repackaging carbon and nutrients (Banse 1995).Weight-specific fecundity and growth are key parameters-descriptors of the rates at which copepods process material, these terms also relate to their potential to supply energy and matter to higher tropic levels. Productivity has become a central and extensively studied aspect of marine plankton research over the last few decades (Runge and Roff 2000). Although egg hatch and postembryonic development times show strong temperature dependence in a wide range of animal groups, including zooplankton (Peterson 2001;Gillooly et al. 2002), these rate processes are largely free from food limitation. Postembryonic development times can 1 Corresponding author (aghi@bas.ac.uk).

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“…We concluded that the maximum density of O. similis nauplii recorded in the present study was very high for a coastal region. Hirakawa et al (2004) inferred that O. similis nauplii significantly contributed to the high overall density of copepod nauplii in Toyama Bay, this species being distributed widely from cold-water areas in the Arctic and Antarctic to temperate areas, where it becomes dominant (Sabatini & Kiørboe 1994, Pane et al 2004, Hopcroft et al 2005, Werner 2005. Extensive sampling by Nishida & Marumo (1982) showed the highest densities of O. similis adults (3000 indiv.…”

Section: ϫ3mentioning

confidence: 99%

Morphology of the naupliar stages of some Oithona species (Copepoda: Cyclopoida) occurring in Toyama Bay, southern Japan Sea

Takahashi¹,

Uchiyama

2007

Plankton Benthos Res

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Adults of Oithona atlantica, Oithona plumifera and Oithona similis occurred throughout the year in Toyama Bay (0-500 m), but in the surface layers (0-50 m), the adults of O. atlantica and O. plumifera were observed in Toyama Bay during different seasons. Based on the differences in adult distribution, O. atlantica nauplii were found in samples collected during spring (April to May) while O. plumifera were found in samples collected during autumn (September to October). Identification of O. atlantica and O. plumifera nauplii and comparisons of their morphological differences were based on this temporal separation. Nauplii of O. atlantica, O. plumifera and O. similis differed in their ratio of body height (maximum length of dorsal-ventral axis) to length (H/L). This characteristic ratio was common to all naupliar developmental stages and is therefore useful as a basis for distinguishing between naupliar stages of the three species. The population and community structure and densities of these species of Oithona were investigated in the surface water layer (0-50 m depth) of Toyama Bay from 1997 to 1999. Major population structural changes occurred in different sampling seasons, and may have been influenced by changes in hydrographic conditions, including temperature and water current. In winter and spring (from February to June), many O. similis and O. atlantica nauplii appeared, and the former nauplii were more dominant. Oithona similis nauplii are suggested to may be the most important species as prey for fish larvae.

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Egg production, growth and development of the cyclopoid copepod Oithona similis

Cited by 206 publications

References 8 publications

Potential zooplankton preys (Copepoda and Appendicularia) for <i>Engraulis anchoita</i> in relation to early larval and spawning distributions in the Patagonian frontal system (SW Atlantic Ocean)

Potential zooplankton preys (Copepoda and Appendicularia) for <i>Engraulis anchoita</i> in relation to early larval and spawning distributions in the Patagonian frontal system (SW Atlantic Ocean)

Growth of marine planktonic copepods: Global rates and patterns in relation to chlorophyll a, temperature, and body weight

Morphology of the naupliar stages of some Oithona species (Copepoda: Cyclopoida) occurring in Toyama Bay, southern Japan Sea

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