Feeding habits and gill raker morphology of three planktivorous pelagic fish species off the coast of northern and western Kyushu in summer

Tanaka, Hiroshige; Aoki, Ichiro; Ohshimo, Seiji

doi:10.1111/j.0022-1112.2006.00988.x

Cited by 75 publications

(52 citation statements)

References 25 publications

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“…The 105 and 200m mesh sizes were similar to the width between rakers measured in smaller teleosts [e.g. herring (Gibson, 1988), singidia tilapia (Goodrich et al, 2000), and Japanese anchovy, Pacific round herring and Japanese jack mackerel (Tanaka et al, 2006)], and the larger mesh size (1000m) was similar to those measured from neonatal whale sharks (Motta et al, 2010). Gill size was increased to 1.5cm width, representing the enlarged gill slits of the basking shark, buccal length was decreased (to 15cm total, 12cm buccal) to test for differences in ontogeny, and flow speed (fish swimming speed) was increased to 60cms -1 for each gill number variation.…”

Section: Filtration Modelssupporting

confidence: 65%

Bottles as models: predicting the effects of varying swimming speed and morphology on size selectivity and filtering efficiency in fishes

Paig-Tran

Bizzarro

Strother

et al. 2011

Journal of Experimental Biology

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SUMMARYWe created physical models based on the morphology of ram suspension-feeding fishes to better understand the roles morphology and swimming speed play in particle retention, size selectivity and filtration efficiency during feeding events. We varied the buccal length, flow speed and architecture of the gills slits, including the number, size, orientation and pore size/permeability, in our models. Models were placed in a recirculating flow tank with slightly negatively buoyant plankton-like particles (~20-2000m) collected at the simulated esophagus and gill rakers to locate the highest density of particle accumulation. Particles were captured through sieve filtration, direct interception and inertial impaction. Changing the number of gill slits resulted in a change in the filtration mechanism of particles from a bimodal filter, with very small (≤50m) and very large (>1000m) particles collected, to a filter that captured medium-sized particles (101-1000m). The number of particles collected on the gill rakers increased with flow speed and skewed the size distribution towards smaller particles (51-500m). Small pore sizes (105 and 200m mesh size) had the highest filtration efficiencies, presumably because sieve filtration played a significant role. We used our model to make predictions about the filtering capacity and efficiency of neonatal whale sharks. These results suggest that the filtration mechanics of suspension feeding are closely linked to an animal's swimming speed and the structural design of the buccal cavity and gill slits. Supplementary material available online at

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Section: Filtration Modelssupporting

confidence: 65%

Bottles as models: predicting the effects of varying swimming speed and morphology on size selectivity and filtering efficiency in fishes

Paig-Tran

Bizzarro

Strother

et al. 2011

Journal of Experimental Biology

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“…increasing from 14.6% (late larvae) to 45.45% (juveniles) and 37.16% (adults). The genus Oncaea has been previously described as particularly important for anchovy diet (Tudela & Palomera 1997, Plounevez & Champalbert 1999, 2000, Sciolis 2000, Tanaka et al 2006. Of particular interest is the importance of bivalve larvae in the nocturnal anchovy diet, as shown both by IRI and Ivlev's selection index in all anchovy ontogenetic stages (Table A1, Fig.…”

Section: Diet Compositionmentioning

confidence: 96%

Diet of Engraulis encrasicolus in the northern Adriatic Sea (Mediterranean): ontogenetic changes and feeding selectivity

Borme¹,

Tirelli²,

Brandt³

et al. 2009

Mar. Ecol. Prog. Ser.

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Ontogenetic variation in the diet of Engraulis encrasicolus (L.) was examined in the northern Adriatic Sea, off the River Po delta, by stomach contents analysis. Anchovy (10 to 130 mm total length) were collected during a 1 wk cruise in October 2002. Feeding activity was mainly diurnal in all the length classes: stomach fullness, calculated for each 10 mm size class, was always higher during the day than at night, with maximal values measured for the 40 to 49 and 50 to 59 mm size classes. All analysed life stages of E. encrasicolus had a strictly zooplanktivorous diet based on a few species of copepods. The principal prey of E. encrasicolus were small-sized copepods, measuring about 0.2 to 0.3 or 0.5 to 0.6 mm in prosoma length. The copepods Euterpina acutifrons and Oncaea spp. dominated anchovy diet during the day, both in terms of frequency, number and biomass, in all anchovy size classes. During the night, bivalve larvae were also important dietary items, with Oncaea spp. and E. acutifrons making up > 69% of total prey number for all anchovy size classes. Within the considered size range, the dimensions of particles does not seem to be a limiting factor in food selection, and no relationship was found between anchovy length and the maximal dimension of ingested prey. Ivlev's electivity index confirmed that European anchovy was able to select specific food items and preferred small copepods such as E. acutifrons and Oncaea spp., and bivalve and decapod larvae. KEY WORDS: Anchovy · Late larvae · Stomach contents · Prey selection · ZooplanktonResale or republication not permitted without written consent of the publisher Mar Ecol Prog Ser 392: 193-209, 2009 Several studies on Engraulis species have demonstrated that anchovy can feed by filtering or particulate feeding (O'Connell 1972, James 1987, James & Findlay 1989, van der Lingen 1994, Bulgakova 1996, van der Lingen et al. 2006, 2009. The ability to switch between these feeding modes makes anchovy highly opportunistic and flexible foragers, which are able to maximize their energy intake through employing the feeding mode most appropriate to a particular food environment. Given this ability, the diet of anchovy, which is generally comprised of mesozooplanktonic prey, may also include smaller particles such as phytoplanktonic cells (King & Macleod 1976, Mikhman & Tomanovich 1977, Bulgakova 1996. The feeding behaviour of anchovies and the resulting variability or breadth in their food intake make field and laboratory studies regarding selectivity the only means of predicting their diet in any particular ecosystem. Robert et al. (2008) recently pointed out the importance of carrying out field studies coupling fish gut contents analysis and prey availability assessment. In fact, the knowledge of prey availability is essential in order to understand the relative importance of food categories and to assess prey selectivity. Moreover, Robert et al. (2008) stressed the importance of obtaining high taxonomical resolution in the identification of prey in sel...

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“…When mass occurrences of N. nomurai occurred, the biomass of N. nomurai was substantial and equivalent to that of the common squid in the Japan Sea. The amount of zooplankton consumed as prey by N. nomurai was not great enough to influence zooplankton biomass in the Japan Sea as a whole; however, dense aggregations of N. nomurai in small areas would lead to some competition for food resources with planktivorous pelagic fish and carnivorous zooplankton that ingest copepods, such as the Japanese anchovy Engraulis japonicus Temminck & Schlegel, 1846, Japanese jack mackerel Trachurus japonicus (Temminck & Schlegel, 1844) (Tanaka et al 2006), and the pelagic chaetognath Zonosagitta nagae (Alvariño, 1967) (Nagasawa and Marumo 1972). Kawahara et al (2006) showed that the growth exponents of N. nomurai were 0.11 for 20-48 day old jellyfish in the laboratory and 0.02 based on field observations from August to December in the southwestern Japan Sea.…”

Section: Copepod Biomass and Productionmentioning

confidence: 99%

Biomass, body elemental composition, and carbon requirement of <i>Nemopilema nomurai</i> (Scyphozoa: Rhizostomeae) in the southwestern Japan Sea

Iguchi

Iwatani

Sugimoto

et al. 2017

Plankton Benthos Res

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Biomass and body elemental composition of the giant jellyfish Nemopilema nomurai in the southwestern Japan Sea were studied using specimens collected with mid-water trawl nets during September and October 2006, 2007. The average biomass of N. nomurai was calculated as 0.26-0.93 g wet weight (WW) m . Body elemental composition of N. nomurai was water=95.8% of WW, carbon=6.6% of dry weight (DW), nitrogen=1.7% of DW, and phosphorus=0.14% of DW. Carbon requirements for growth and respiration were estimated in per unit area using biomass data. For growth analysis, size-frequency distributions of bell diameter (BD) were examined from specimens collected using set-nets in Wakasa Bay during August-January in 2005-2007 and the growth rate was calculated as 1.5 cm d . Biomass and carbon requirement data of N. nomurai were compared to the biomass of the common squid Todarodes pacificus and copepod production, respectively, in the Japan Sea. In the present study, it was demonstrated that when mass incidences of N. nomurai occurred in the Japan Sea, the biomass of N. nomurai was substantial and equivalent to that of the common squid. The amount of zooplankton consumed as prey by N. nomurai was not large enough to influence the biomass of zooplankton as a whole; however, it was critical for dense aggregations in a small area.

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Feeding habits and gill raker morphology of three planktivorous pelagic fish species off the coast of northern and western Kyushu in summer

Cited by 75 publications

References 25 publications

Bottles as models: predicting the effects of varying swimming speed and morphology on size selectivity and filtering efficiency in fishes

Bottles as models: predicting the effects of varying swimming speed and morphology on size selectivity and filtering efficiency in fishes

Diet of Engraulis encrasicolus in the northern Adriatic Sea (Mediterranean): ontogenetic changes and feeding selectivity

Biomass, body elemental composition, and carbon requirement of <i>Nemopilema nomurai</i> (Scyphozoa: Rhizostomeae) in the southwestern Japan Sea

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