Interrelationships Between Pelagic Fishes and Plankton in the Coastal Fishing Ground of the Southwestern Japan Sea

Ogawa, Yasuki; Nakahara, T.

doi:10.3354/meps001115

Cited by 10 publications

(5 citation statements)

References 2 publications

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“…Specchi et al (1999) confirmed this hypothesis, verifying the synchronism between the occurrence of the cladoceran and the appearance of anchovy in the Gulf of Trieste (northern Adriatic). In contrast, Ogawa & Nakahara (1979) found that high concentrations of cladocerans could produce unfavourable effects on the feeding activity of small planktivores. In the present study, P. avirostris was found in stomach contents mainly at night (Table A1), but it never represented an important prey even if it was abundant at sea, especially in the area where anchovy were caught (> 3000 individuals m -3 ; Table A2).…”

Section: Gulf Of Lions Catalan Sea Bay Of Biscay)mentioning

confidence: 89%

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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Section: Gulf Of Lions Catalan Sea Bay Of Biscay)mentioning

confidence: 89%

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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“…In some cases, such conditions may not result in mortality but in avoidance by fish, leading to localised reductions in fisheries (Bhimachar and George, 1950;Ogawa and Nakahara, 1979;Devassy, 1989). A Noctiluca bloom can create a large quantity of mucus, which mechanically damages fish gills or interferes with fish respiration (Subramanian, 1985).…”

Section: Noctiluca Scintillansmentioning

confidence: 98%

The Effects of Harmful Algal Blooms on Aquatic Organisms

Landsberg

2002

Reviews in Fisheries Science

1,126

807

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“…Many studies have investigated the interrelationship between fishes and zooplankton (Chidambaram and Menon, 1945;Subrahmanyan, 1959;Ogawa and Nakahara, 1979;Harding et al, 2011). The pelagic fishes showed a direct relationship with zooplankton, whereas the mid pelagic and demersal fishes showed a prey-predator relationship in the marine food web.…”

Section: Discussionmentioning

confidence: 99%

Environmental influence on the secondary productivity and fish abundance in coastal fishing grounds off Mangalore, south-eastern Arabian Sea

et al. 2016

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Environmental parameters influence the productivity and abundance of fish in marine ecosystems. In this study, we attempted to analyse the relationship between environmental parameters and abundance of fish in trawling grounds in south-eastern Arabian Sea along the coast of Karnataka. Among the 85 species of finfishes and shellfishes caught in the trawling grounds, 41 finfish species, 24 crustaceans, 18 molluscs and two echinoderms were recorded. Seasonal differences were seen in biomass with the highest biomass during the post-monsoon period (October-January). Water temperature and nutrients were the key contributing factors of seasonal differences in the biotic communities studied. Season specific diagnostic species were identified using SIMPER analysis. Squilla which formed the major prey item of most of the demersal fishes dominated (>40%) coastal grounds throughout all seasons. This could be considered as a fishery indicator of the region. The dominance and abundance of copepods was found to be influenced by sea surface temperature (SST) and nutrients. The results of the study have implications on the fishery, knowledge on environmental factors influencing the abundance and importance of non-commercial species in sustaining the fishery in the region.

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Interrelationships Between Pelagic Fishes and Plankton in the Coastal Fishing Ground of the Southwestern Japan Sea

Cited by 10 publications

References 2 publications

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

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

The Effects of Harmful Algal Blooms on Aquatic Organisms

Environmental influence on the secondary productivity and fish abundance in coastal fishing grounds off Mangalore, south-eastern Arabian Sea

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