Induced reproduction and reproductive characteristics of Rhinelepis aspera Agassiz, 1829 (osteichthyes: Siluriformes, Loricariidae)

Sato, Yoshimi; Fenerich-Verani, Nelsy; Verani, José Roberto; Godinho, Hugo Pereira; Sampaio, Édson Vieira

doi:10.1590/s1516-89131998000300006

Cited by 13 publications

(17 citation statements)

References 2 publications

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“…In fish farming, the concept of degree-hours is a valuable tool for estimating the time of ovulation and hatching because temperature is an important abiotic factor that influences the speed of physiological processes of organisms. The stripping of the oocytes from L. alexandri was performed at an average of 218 degree-hours (approximately 8.4 h) after the second dose of CPH at 26°C; these results were similar to those obtained in other Siluriformes submitted to the same water temperature: 212 degree-hours in Rhinelepis aspera (Sato et al, 1998), 213 in Pimelodus maculatus (Sato et al, 1999), and 226 in Pseudoplatystoma corruscans (Sato et al, 2003a). Hatching in L. alexandri was on average 1358 degree-hours (approximately 56.6 h) after egg fertilization at 24°C, which is a relatively long time but is similar to that of other Siluriformes that have adhesive and large eggs: 1099 degree-hours (approximately 45.8 h) in Franciscodoras marmoratus and 1022 degree-hours (approximately 42.6 h) in Rhinelepis aspera (Sato et al, 2003a).…”

Section: Discussionmentioning

confidence: 57%

“…Essential biological information about wild populations, such as reproductive cycles, fecundity, and fertility, are needed to manage native and endangered species and for aquaculture purposes (Sato et al, 1998;Sato et al, 2003a;Caneppele et al, 2009;Arantes et al, 2011). Although L. alexandri is potentially useful in aquaculture and important in sport and craft fishing, only a few studies about its reproductive biology have been published, and they describe the reproductive apparatus, gametogenesis, and adhesive eggs (Rizzo et al, 2002;Barros et al, 2007).…”

Section: Discussionmentioning

confidence: 99%

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Induced spawning and reproductive variables of the catfish Lophiosilurus alexandri Steindachner, 1876 (Siluriformes: Pseudopimelodidae)

Santos

Sampaio²,

Arantes

et al. 2013

Neotrop. ichthyol.

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Lophiosilurus alexandri is an endemic fish from the São Francisco River basin, Brazil. The aim of this study was to induce L. alexandri to spawn and to obtain data on several reproductive variables for this species. For induced spawning, adults were submitted to Cyprinus carpio pituitary homogenate (CPH). Nine of the 12 females (75%) responded positively to the treatment. The stripping of oocytes was performed 8.4 h after the second dose of CPH with the water temperature maintained at 26ºC. The number of stripped oocytes per gram of ova was 74 ± 5 oocytes g -1, and the mean oocyte diameter was 3.1 ± 0.2 and 3.6 ± 0.2 mm, before and after hydration, respectively. The oocytes were opaque, yellowish, demersal, highly adhesive, and covered by a gelatinous coat. The total fecundity was 4,534 ± 671 oocytes, and the fertilization rate was 59%. The initial and final fertilities were 2,631 ± 740 and 1,542 ± 416 embryos, respectively. Larval hatching occurred up to 56 h after fertilization, and the larvae had a total length of 8.4 ± 0.1 mm. This work provides important biological information for L. alexandri that can be used for management and conservation of this species.Lophiosilurus alexandri é um peixe endêmico da bacia do rio São Francisco, Brasil. O objetivo do trabalho foi induzir L. alexandri à desova e obter dados sobre várias variáveis reprodutivas para esta espécie. Para desova induzida, adultos foram submetidos ao homogeneizado de hipófise de Cyprinus carpio (HHC). Nove das 12 fêmeas (75%) responderam positivamente ao tratamento. A extrusão dos ovócitos aconteceu 8,4 h após a segunda dose de HHC com a temperatura da água mantida a 26ºC. O número de ovócitos liberados por grama de ova foi de 74 ± 5 ovócitos g -1 e a média do diâmetro ovocitário foi de 3,1 ± 0,2 e 3,6 ± 0,2 mm, antes e depois da hidratação, respectivamente. Os ovócitos foram opacos, amarelo-castanho, demersais, altamente adesivos e revestidos por capa gelatinosa. A fecundidade total apresentou 4.534 ± 671 ovócitos e a taxa de fertilização foi de 59%. As fertilidades inicial e final foram de 2.631 ± 740 e 1.542 ± 416 embriões, respectivamente. A eclosão das larvas aconteceu até 56 h após a fertilização e as larvas tiveram comprimento total de 8,4 ± 0,1 mm. Este trabalho fornece informações biológicas importantes para L. alexandri, que podem ser utilizadas para o manejo e conservação desta espécie.

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Section: Discussionmentioning

confidence: 57%

Section: Discussionmentioning

confidence: 99%

Induced spawning and reproductive variables of the catfish Lophiosilurus alexandri Steindachner, 1876 (Siluriformes: Pseudopimelodidae)

Santos

Sampaio²,

Arantes

et al. 2013

Neotrop. ichthyol.

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“…(Dabrowski et al, 2008). However, higher efficiencies (60-70%) have been registered in other catfishes, such as Rhamdia quelen and Pimelodus maculatus (Sato, 1999), and even higher (>70%) in Rhinelepis aspera (Sato et al, 1998) and Pseudoplatystoma fasciatum (Padilha Peréz et al, 1991;Leonardo et al, 2004;Romagosa et al, 2005;Nuñez et al, 2008).…”

Section: Discussionmentioning

confidence: 98%

Induced spawning and early ontogeny in hatchery-reared catfish Zungaro jahu (Siluriformes: Pimelodidae)

et al. 2012

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Hatchery-kept catfish jahus Zungaro jahu (Ihering, 1898) were induced to spawn with carp pituitary extract. The telolecithal eggs were round (1.6 ± 0.1 mm in diameter), demersal, free, and covered with a 0.4 mm-thick jelly coat. The gonadosomatic index of 2.8 was comparable to that of other Pimelodidae. The number of eggs x g of ova-1 was 804 ± 144. Hatching occurred 14.5 h after fertilization, at a temperature of 27.3 ± 0.4º C. The newly-hatched embryos measured 3.9-4.3 mm of total length (TL). At 18 h post-hatching (HPH; 5.3 ± 0.1 mm TL), the retina was pigmented, the mouth opened and dorsoflexion of the notochord had initiated. At 36 HPH (6.4 ± 0.2 mm TL), fusiform chromatophores were vertically arranged in the primordial fin fold and the notochord was dorsoflexed. The yolk sac was almost exhausted by 48 HPH (7.3 ± 0.2 mm TL). At 128 HPH (8.6 ± 0.6 mm TL) the pectoral, dorsal, adipose, caudal, anal, and pelvic fins were readily observable whereas the primordial fin fold was no longer visible. At 224 HPH (16.6 ± 2.5 mm TL), the metamorphosis was completed and the larvae had acquired the juvenile appearance.

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“…These studies can characterize the most important events during development, such as the total consumption of the yolk sac, the appearance of internal and external structures, mouth opening, and other characteristics (Sato et al, 1998;Nakatani et al, 2001;Sato et al, 2003;Borçato et al, 2004;Kamler, 2008). For carnivorous species, the exact timing of the mouth opening is important to indicate the time that the animal, until then considered to be within a closed system, enters into an open system, and therefore begins exogenous food intake.…”

Section: Discussionmentioning

confidence: 99%

Influence of spawning procedure on gametes fertilization success in Salminus hilarii Valenciennes, 1850 (Teleostei: Characidae): Implications for the conservation of this species

et al. 2011

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Artificial reproduction and gamete fertilization were evaluated in Salminus hilarii wild and domesticated broodstocks. Wild and domesticated broodstocks were artificially induced to reproduction using a carp pituitary treatment. Four groups were considered: Group 1 (G1), fish caught in the wild maintained for three years in the same conditions as the domesticated broodstocks and spawned naturally; Group 2 (G2), broodstock born and raised in captivity and spawned naturally; Group 3 (G3), wild broodstocks, which were manually stripped for gamete collection and dry fertilization; and Group 4 (G4), domesticated males and females, also manually stripped. Oocytes, eggs, and larvae were sampled at different time intervals throughout embryonic development. Yolk sac absorption occurred approximately 24-29 h after hatching. Twenty-six h after hatching, the larvae mouths opened. Cannibalism was identified just 28-30 h after hatching. There was no morphological difference in embryonic development among all groups. The number of released eggs per gram of female was: G1: 83.3 ± 24.5 and G2: 103.8 ± 37.4; however, the fertilization success was lower in G2 (42.0 ± 6.37 %) compared with G1 (54.7 ± 3.02%) (P = 0.011). Handstripping of oocytes was not successful and the fertilization rate was zero. The reproduction of this species in captivity is viable, but it is necessary to improve broodstock management to enhance fertilization rates and obtain better fingerling production for restocking programs.A reprodução artificial e fertilização dos gametas foram avaliados em reprodutores selvagens e de cativeiro de Salminus hilarii. Reprodutores selvagens e de cativeiro foram induzidos artificialmente à reprodução utilizando hipófise de carpa. Quatros grupos foram considerados: Grupo 1 (G1), peixes capturados na natureza, mantidos por três anos nas mesmas condições de reprodutores de cativeiro e desovados naturalmente; Grupo 2 (G2), reprodutores nascidos e criados em cativeiro e desovados naturalmente; Grupo 3 (G3), reprodutores selvagens que foram extrusados manualmente para a coleta de gametas e fertilização a seco; e Grupo 4 (G4), com machos e fêmeas domesticadas, também extrusados manualmente. Oócitos, ovos e larvas foram amostrados em diferentes intervalos de tempo ao longo do desenvolvimento embrionário. A absorção do saco vitelínico ocorreu aproximadamente 24-29 h após a eclosão. Vinte e seis h após a eclosão, as larvas abriram a boca. O canibalismo foi identificado apenas 28-30 h após a eclosão. Não houve diferença morfológica no desenvolvimento embrionário entre todos os grupos. O número de ovos liberados por grama de fêmea foi: G1: 83,3 ± 24,5 e G2: 103,8 ± 37,4; embora, o sucesso na fertilização tenha sido menor no G2 (42,0 ± 6,37%) em comparação com G1 (54,7 ± 3,02%) (P = 0,011). A extrusão manual dos oócitos não foi bem sucedida e a taxa de fertilização foi zero. A reprodução em cativeiro desta espécie é viável, mas é necessário um melhor manejo dos reprodutores para aumentar as taxas de fertilização, visando a obtenção de u...

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Induced reproduction and reproductive characteristics of Rhinelepis aspera Agassiz, 1829 (osteichthyes: Siluriformes, Loricariidae)

Cited by 13 publications

References 2 publications

Induced spawning and reproductive variables of the catfish Lophiosilurus alexandri Steindachner, 1876 (Siluriformes: Pseudopimelodidae)

Induced spawning and reproductive variables of the catfish Lophiosilurus alexandri Steindachner, 1876 (Siluriformes: Pseudopimelodidae)

Induced spawning and early ontogeny in hatchery-reared catfish Zungaro jahu (Siluriformes: Pimelodidae)

Influence of spawning procedure on gametes fertilization success in Salminus hilarii Valenciennes, 1850 (Teleostei: Characidae): Implications for the conservation of this species

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