Feeding habits, daily ration and vertical migration of the cape horse mackerel off South Africa

Barangé, Manuel

doi:10.2989/025776198784126683

Cited by 27 publications

(16 citation statements)

References 18 publications

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“…We ascribe the acoustic signatures of fish to hake and horse mackerel, based on the trawl catches and knowledge of the fish fauna from previous studies. Horse mackerel in the Ben guela upwelling system form daytime acoustic scattering layers near the seabed or sometimes in mid-column waters, where they forage on deep-water plankton (Pillar & Barange 1998). Juvenile hake normally reside in near-bottom waters and ascend into the water column during feeding migrations under the cover of darkness at night (Pillar & Barange 1995, 1997.…”

Section: Discussionmentioning

confidence: 99%

Internal wave-mediated shading causes frequent vertical migrations in fishes

Kaartvedt¹,

Klevjer²,

Aksnes³

2012

Mar. Ecol. Prog. Ser.

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Section: Discussionmentioning

confidence: 99%

Internal wave-mediated shading causes frequent vertical migrations in fishes

Kaartvedt¹,

Klevjer²,

Aksnes³

2012

Mar. Ecol. Prog. Ser.

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“…present diurnal feeding habits (Shuntov, 1969;Pillar & Barange, 1998). Daily variation in feeding activity is often recorded in other carangids, and they usually present a pattern of feeding activity with greater intensity around twilight (Danemann, 1993;Helmer et al, 1995 The circadian rhythms in fish may be associated with various factors such as light, temperature, salinity, and availability of prey or with association of these factors.…”

Section: Discussionmentioning

confidence: 99%

Diel feeding pattern and diet of rough scad Trachurus lathami Nichols, 1920 (Carangidae) from the Southwestern Atlantic

Carvalho

Soares

2006

Neotrop. ichthyol.

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Diel changes in feeding activity and dietary composition of the rough scad Trachurus lathami were investigated through the analysis of stomach contents of 307 fish sampled over a 24-h period on the continental shelf off Ubatuba (23 o 35´S 45 o W). Stomach contents were analyzed by frequency of occurrence (O%), percent number (N%), percent mass (M%), and feeding index (FI% = O% * M%). Rough scad fed on mollusks (Gastropoda, Crepidula sp.), crustacean (Ostracoda, Copepoda, decapod larvae), chaetognat and teleostean fish. The main items were calanoid copepods (Eucalanus sp. and Centropages sp.). According to the analysis of the stomach fullness and prey digestion, T. lathami is both a diurnal and nocturnal feeder, showing some seasonal variation in feeding time. According to the Chronobiology concept, it was raised the hypothesis of circadian rhythm in feeding of this fish, probably synchronized by light/dark cycle.O estudo da dieta e do padrão diário e sazonal de atividade alimentar do chicharro Trachurus lathami foi realizado através de análises dos conteúdos estomacais de 307 peixes amostrados em estações fixas de coleta de 24 horas na plataforma continental ao largo de Ubatuba (23 o 35´S 45 o W). Os conteúdos estomacais foram analisados através da freqüência numérica (N%), massa porcentual (M%) e freqüência de ocorrência (O%) dos itens alimentares, e índice alimentar (O% * M%). A espécie caracterizouse por ingerir principalmente copépodes calanóides (ex. Eucalanus sp. e Centropages sp.), além de outros crustáceos (Ostracoda, larva de decápodes), moluscos (Gastropoda: Crepidula sp.), quetognatos e peixes teleósteos. De acordo com o grau de repleção estomacal e grau de digestão das presas, T. lathami ingeriu alimento tanto na fase clara quanto na fase escura do dia, apresentando variação sazonal no horário de tomada de alimento. De acordo com os conceitos da Cronobiologia foi levantada a hipótese de ritmo circadiano na atividade alimentar, provavelmente sincronizado pelo ciclo claro/escuro.

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“…Improved knowledge of the exchanges between populations of horse mackerel in the different regions of the Benguela system, as well as better insight into the factors that control and modulate their vertical distribution (Pillar and Barange 1998), is needed before the relationships between environmental conditions, fish availability and fish vertical distribution can be elucidated. Until such time, interpretations of catch and cpue indices will remain questionable.…”

Section: Horse Mackerel Life Historymentioning

confidence: 99%

“…An example of a target off the shelf-break is presented in Figure 9. Typically, horse mackerel fonn undulating, high-density concentrations in midwater for several miles, moving closer to the sea bed during the day (Pillar and Barange 1998). An important finding is the difference in size between horse mackerel taken in bottom and midwater trawls.…”

Section: Stock Assessment Cruises 1991-1994mentioning

confidence: 99%