Food selectivity of seven-band grouper &lt;i&gt;Epinephelus septemfasciatus&lt;/i&gt; larvae fed different sizes of rotifers

Tanaka, Yukari; Sakakura, Yoshitaka; Chuda, Hisashi; Hagiwara, Atsushi; Yasumoto, Susumu

doi:10.2331/suisan.71.911

Cited by 36 publications

(20 citation statements)

References 14 publications

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“…For explanation of each interval, see text larvae keep their position against the water circulation caused by aeration and sometimes move forward during the daytime, and drift with the water circulation in the nighttime [11]. Heavy mortalities during the transitional period from the preceding to the present phases, corresponding to the mixed feeding period, have been reported in larvae of groupers including E. fasciatus, and the reason is considered to be an incompatibility between the larval mouth and prey sizes [11,18,[43][44][45][46], and delayed initial feeding of larvae [47][48][49]. To overcome this phase smoothly, smaller S-type rotifers such as Thai strain or screened rotifers must be introduced into the tank before completely exhausting the endogenous nutrition.…”

Section: Discussionmentioning

confidence: 99%

Morphological development of larval and juvenile blacktip grouper, Epinephelus fasciatus

Kawabe

Kohno

2009

Fish Sci

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The morphological development of larval and juvenile blacktip grouper, Epinephelus fasciatus, was examined using a hatchery-reared series. By about 5 mm body length (BL), the larvae developed characteristic pigmentation patterns of groupers, such as melanophores on the dorsal part of the gut, on the tips of the seconddorsal and pelvic fin spines, and on the midpoint of the tail to form a cluster. In addition, characteristic spines of groupers, such as spinelets on the second-dorsal and pelvic fin spines, and the preopercular angle spine developed by about 6 mm BL. The notochord end was in the process of flexion in larvae of 6-7 mm BL, by when major melanophores, spines, and jaw teeth started to appear. After the fin ray counts attained the adult complement at about 14 mm BL, somewhat densely pigmented bands started to appear on the body. The fish had the five distinct transverse bands and attained adult-like attire at about 40 mm BL when the major head spines disappeared and body parts in relation to BL became stable.

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Section: Discussionmentioning

confidence: 99%

Morphological development of larval and juvenile blacktip grouper, Epinephelus fasciatus

Kawabe

Kohno

2009

Fish Sci

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“…Its mean body length and width were 83±11 μm and 40±6 μm respectively, which is 38.1% smaller and 60.3% narrower than lorica size of B. rotundiformis. It has been suggested that the availability of small live food organisms is important for successful rearing of fish larvae with small mouths (Eda, et al, 1990;Polo et al, 1992;Doi et al, 1997;Okumura, 1997;Tanaka et al, 2005;Olivotto et al, 2006;Akazawa et al, 2008;Soyano et al, 2008). Small live food organisms that have been offered to fish larvae include ciliate, bivalve larvae, sea urchin eggs, barnacle nauplii, oyster trochopores or copepods, but the results are still unsatisfactory due to the low nutritional value or difficulties of culturing the organisms at high density (Rimmer, 2000).…”

Section: Discussionmentioning

confidence: 99%

The minute monogonont rotifer Proales similis de Beauchamp: Culture and feeding to small mouth marine fish larvae

Wullur¹,

Sakakura²,

Hagiwara³

2009

Aquaculture

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The body length and width of Proales similis (mean±SD; 83±11 μm and 40±6 μm, respectively) is 38.1% smaller and 60.3% narrower than that of Brachionus rotundiformis.Due to its small size, P. similis has potential for rearing marine fish larvae which require first food smaller than B. rotundiformis. We examined the feasibility of using P. similis as live food by analyzing its life history, population growth and feeding incidence by fish larvae. P. similis produced first offspring on 2.5-2.8 days after hatch. Females produced 4.3-7.8 offspring during their 2.9-3.4 day reproductive period. P. similis grew well at temperatures 25 to 35 0 C (density = 250 to 1030 ind./ml; r = 0.68 to 0.81 day -1 ) and at salinities 2 to 15 ppt (density = 360 to 500 ind./ml; r = 0.73 to 0.78 day -1 ). Population density of P. similis was higher than B. rotundiformis after 8 days of culture period with either N. oculata and C. vulgaris as food. In mass culture, population density of P. similis increased from 25 to 2,400 ind./ml (r = 0.42 day -1 ) after 11 days. Results from feeding experiments confirm that P. similis is consumed by seven-band grouper (Epinephelus septemfasciatus) larvae. The larvae demonstrated the highest feeding rate at 20 ind./ml of P.similis.

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“…Thus zooplankton of various sizes can be used in feeding experiments to evaluate the most suitable prey for a given age group of fish larvae. This will ensure better health and survival of cultured fishes (Tanaka et al 2005;Hagiwara et al 1997).…”

Section: Introductionmentioning

confidence: 98%

Feeding behaviour, feed selectivity and growth studies of mangrove killifish, Kryptolebias marmoratus, larvae using various live and formulated feeds

2007

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Nine types of live foods viz. L, S and SS morphotypes of Brachionus plicatilis sp. complex, first instar Artemia franciscana, Fabrea salina, Acartia tsuensis, Tigriopus japonicus, Diaphanosoma celebensis, Moina mongolica and a formulated feed of two sizes (400 and 700 µm) were used to observe feeding behaviour and growth of mangrove killifish, Kryptolebias marmoratus. Behavioural observations were made for one hour on days 0, 1, 5, and 10 after hatching. Focus, unsuccessful and successful attacks and vomit were noted. With rotifers L, S and SS types and newly hatched Artemia nauplii as food, all the larvae showed maximum feeding success throughout the experimental period. Larvae did not consume any of the 700 µm artificial diet. Vomiting was noticed on capturing the ciliate Fabrea and 400 µm artificial diets. Rotifers were ingested in greater numbers. SS-type rotifers were consumed in largest number (209.2/h per individual) on day 10. Significantly greater growth was observed after 10 days rearing with L type rotifer, Artemia nauplii, T. japonicus, A. tsuensis, M. mongolica, D. celebensis, and a mixture of L type rotifer and F. salina (Tukey-Kramer post hoc test, P<0.05). Feed selectivity experiments on days 0, 1, 5 and 10 revealed that killifish larvae feed preferentially on Artemia nauplii and rotifers from a mixture of Artemia nauplii, rotifers, A. tsuensis, T. japonicus, D. celebensis and M. mongolica. Techniques for culturing various zooplankton at small-scales are also described.

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Food selectivity of seven-band grouper <i>Epinephelus septemfasciatus</i> larvae fed different sizes of rotifers

Abstract: Food selectivity of seven-band grouper Epinephelus septemfasciatus larvae fed diŠerent sizes of rotifers YUKARI TANAKA, 1a YOSHITAKA SAKAKURA, 2 HISASHI CHUDA, 3b

Cited by 36 publications

References 14 publications

Morphological development of larval and juvenile blacktip grouper, Epinephelus fasciatus

Morphological development of larval and juvenile blacktip grouper, Epinephelus fasciatus

The minute monogonont rotifer Proales similis de Beauchamp: Culture and feeding to small mouth marine fish larvae

Feeding behaviour, feed selectivity and growth studies of mangrove killifish, Kryptolebias marmoratus, larvae using various live and formulated feeds

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