Induced Spawning of the Japanese Eel.

Satoh, Hideo; Yamamori, Kunio; Hibiya, Takashi

doi:10.2331/suisan.58.825

Cited by 42 publications

(30 citation statements)

References 2 publications

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“…The importance of timing was previously emphasised for artificially matured Japanese eels (Satoh et al 1992;Ohta et al 1996). In this species, good quality eggs were obtained after the body weight had increased over initial values by 20% as a result of hydration (Satoh et al 1992;Ohta et al 1996). In the present study, ovarian samples were collected by cannulation after increases in body weight of 5-10% had been attained, which is somewhat earlier than in a previous study (c. 15%; Lokman & Young unpubl.…”

Section: Discussionmentioning

confidence: 37%

“…Attention was initially focused on optimising the timing for induction of final oocyte maturation and ovulation, and to strip the eggs. The importance of timing was previously emphasised for artificially matured Japanese eels (Satoh et al 1992;Ohta et al 1996). In this species, good quality eggs were obtained after the body weight had increased over initial values by 20% as a result of hydration (Satoh et al 1992;Ohta et al 1996).…”

Section: Discussionmentioning

confidence: 99%

“…At present, larval production appears to be routinely realised in the Japanese eel only (e.g., Satoh et al 1992;Ohtaetal. 1996Ohtaetal.…”

Section: Discussionmentioning

confidence: 99%

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Induced spawning and early ontogeny of New Zealand freshwater eels{Anguilla dieffenbachiiandA. australis)

Lokman

Young

2000

New Zealand Journal of Marine and Freshwater Research

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Knowledge on the reproductive biology of New Zealand freshwater eels (Anguilla australis Richardson and A. dieffenbachii Gray) is limited to changes associated with gametogenesis in the adults; details pertaining to embryonic and larval development are not available, but are of obvious benefit for a better understanding of the eel life history and for artificial propagation programmes, whether for aquaculture or conservation purposes. Therefore, eels were artificially matured and eggs fertilised with sperm from either species to investigate early ontogeny. Only eggs from A. australis hatched successfully after c. 45 h of incubation at room temperature, yielding larvae of c. 2.5 mm in length. Larvae survived for up to 5 days, by which time they had attained a length of 5.3 mm. Scanning electron microscopy of 1-and 2-day-old larvae revealed the presence of prominent free neuromasts on the head and along the flanks. Although hatching of New Zealand eels was achieved for the first time, it is strongly recommended that hormone treatment be initiated immediately following capture, well before ovarian atresia starts.

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Section: Discussionmentioning

confidence: 37%

Section: Discussionmentioning

confidence: 99%

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Induced spawning and early ontogeny of New Zealand freshwater eels{Anguilla dieffenbachiiandA. australis)

Lokman

Young

2000

New Zealand Journal of Marine and Freshwater Research

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“…Injection of DHP successfully induced oocyte maturation and ovulation in almost all females used in the experiments (Ohta et al 1996a. The ovulation rates obtained in our experiments are much higher than those reported in the previous studies (Satoh et al 1992). Therefore, DHP injection after SPE is a very useful method for induction of the last phase of oocyte maturation and ovulation in Japanese eel.…”

Section: -1 Induction Of Vitellogenesismentioning

confidence: 40%

Oogenesis in Teleost Fish

Kagawa¹

2013

Aqua-BioSci. Monogr. (ABSM)

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“…The earlier start of downstream migration in river eels is probably why some had higher GSI values than the other types. However, the GSI level reaches 30 to 60 at the final stage of maturation in Japanese eels that are artificially matured with hormone treatments (Satoh et al 1992, Sato 2003, so minor differences in maturity at the beginning of the spawning migration should not be an impediment to reproduction.…”

Section: Discussionmentioning

confidence: 99%