La Spermiogenèse Et Le Spermatozoïde d'ANGUILLA Anguilla L. Étude Ultrastructurale

Billard, Roland; Ginsburg, Anna S.; Escaffre, Anne-Marie; Huneau, D.

doi:10.1051/rnd:19730401

Cited by 37 publications

(28 citation statements)

References 2 publications

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“…In addition, the diameter of the micropyle of A. dieffenbachii eggs is the same as that of eggs from A. japonica and A. anguilla (3 (im, Ohta et al 1983;Prokhorchik et al 1989), despite differences in width of the spermatozoon head: thus, in A. anguilla and A. japonica, the spermatozoon head measures just over 1 ^.m in width (Billard & Ginsburg 1973;Colak & Yamamoto 1974), whereas this value is tripled for A. dieffenbachii spermatozoa (Todd 1974(Todd , 1976.…”

Section: Discussionmentioning

confidence: 90%

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: 90%

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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“…This pattern has been described, for example, in the spermatozoa of a myzostomid (Afzelius 1983, Mattei andMarchand 1988), a didymozoid (Justine and Mattei 1983), a schistosome (Kitajima et al 1976) and also a number of fish species (Billard and Ginsburg 1973;Boisson et al 1967;Ginsburg and Billard 1972;Mattei and Mattei 1973).…”

Section: Spermatozoonmentioning

confidence: 91%

Ultrastructure of spermiogenesis and spermatozoon of Leptorhynchoides plagicephalus (Acanthocephala, Palaeacanthocephala), a parasite of the sturgeon Acipenser naccarii (Osteichthyes, Acipenseriformes)

Foata

Dezfuli

Pinelli

et al. 2004

Parasitology Research

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This paper describes the ultrastructure of spermiogenesis and the spermatozoon of Leptorhynchoides plagicephalus, an acanthocephalan parasite of the sturgeon Acipenser naccarii, a species which is under the threat of extinction. At the beginning, spermiogenesis in L. plagicephalus is characterized by the presence of a single centriole in the early spermatid. This centriole generates a flagellum with a 9+0 pattern. Another ultrastructural feature observed during the spermiogenesis of L. plagicephalus is the condensation of chromatin to form an "intranuclear wall". The mature spermatozoon of L. plagicephalus presents a reversed anatomy, as observed in other species of the Acanthocephala. The spermatozoon is divided into two parts: an axoneme and a nucleocytoplasmic derivative. The pattern of spermiogenesis and the ultrastructural organization of the spermatozoon of L. plagicephalus are compared with information available on other acanthocephalan species. The appearance of an "intranuclear wall" observed during the present study represents the first record within the Acanthocephala and is unknown from other animal taxa.

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“…The mid-piece is reduced (14). An original type of spermiogenesis has been described in the eel (17) where the nucleus elongates greatly and a mitochondrion is found in the anterior part of the sperm head.…”

Section: Introductionmentioning

confidence: 99%

Spermatogenesis and spermatology of some teleost fish species

Billard¹

1986

Reprod. Nutr. Dévelop.

Self Cite

391

241

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La Spermiogenèse Et Le Spermatozoïde d'ANGUILLA Anguilla L. Étude Ultrastructurale

Abstract: RÉSUMÉ

Cited by 37 publications

References 2 publications

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

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

Ultrastructure of spermiogenesis and spermatozoon of Leptorhynchoides plagicephalus (Acanthocephala, Palaeacanthocephala), a parasite of the sturgeon Acipenser naccarii (Osteichthyes, Acipenseriformes)

Spermatogenesis and spermatology of some teleost fish species

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