Effect of restricted feeding on early maturation in female and male amago salmon, Oncorhynchus masou ishikawae

Silverstein, Jeffrey T.

doi:10.1006/jfbi.1994.1208

Cited by 12 publications

(16 citation statements)

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“…Among females in our study, their greater sensitivity to food deprivation and lower incidence of maturity compared with males have been observed previously Silverstein and Shimma 1994) and can be attributed to the greater energetic cost of female maturation. The major decrease in female grilse rate by all three deprivation treat- Fig.…”

Section: Sea Cage Experimentssupporting

confidence: 54%

Effect of winter food deprivation on growth and sexual maturity of Atlantic salmon (Salmo salar) in seawater

Duston¹,

Saunders²

1999

Can. J. Fish. Aquat. Sci.

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By identifying individual Atlantic salmon (Salmo salar) smolts (age 1+, mean weight 95 g), a tank study with four treatments (n = 175 fish per tank) indicated that maturation as grilse is associated with changes in somatic growth over many months, from July of the first summer in seawater onwards. The grilse rate in both sexes was associated with a relatively high condition factor from July onwards, but was independent of fork length. Food deprivation in either early winter , late winter (February-April, 0.7-4.0°C), or both early and late winter (double deprived) reduced the female grilse rate (p < 0.01) to 4, 7, and 2% versus 18% in the control, whereas male grilse rate was reduced by a lesser degree (p > 0.05), 43, 39, and 33% versus 44% in the control. Mean condition factor among both maturing and immature fish decreased by a similar degree due to food deprivation but from spring onwards increased by a faster rate among incipient grilse. In a large experiment in four sea cages (each n = 3885 fish) using similar food deprivation treatments, the reduction in grilse rate was statistically significant in both sexes: among males, 28-36 versus 43% in the control; among females, 3-4 versus 6% in the control.Résumé : Dans une étude en bassins avec quatre traitements (n = 175 poissons par bassin) dans laquelle des smolts de saumon atlantique (Salmo salar) (âge 1+, poids moyen de 95 g) étaient identifiés individuellement, on a observé que la maturation précoce (madeleineaux) était associée avec des changements dans la croissance somatique sur de nombreux mois, à partir du mois de juillet du premier été en eau de mer. Le taux d'apparition des madeleineaux chez les deux sexes était associé à un coefficient de condition relativement élevé à partir de juillet, mais était indépendant de la longueur à la fourche. La privation de nourriture au début de l'hiver (novembre à décembre, 8,2 à 4,1°C), à la fin de l'hiver (février à avril, 0,7 à 4,0°C) ou durant ces deux périodes (double privation) a réduit le taux d'apparition des madeleineaux femelles (p < 0,01) à 4, 7, et 2% contre 18% chez les témoins considérant que le taux d'apparition des madeleineaux mâles a été réduit par un peu de degré (p > 0,05), 43, 39 et 33% contre 44% chez les témoins. Le coefficient de condition moyen parmi tous les deux mfrissant et non mfrs les poissons a diminué par un degré semblable df à la privation de nourriture mais à partir du printemps a agumenté à une vitesse plus rapide parmi les madeleineaux naissants. Dans une expérience de grande envergure effectuée dans quatre cages marines (n = 3 885 poissons par cage) utilisant les mêmes traitements de privation de nourriture, la réduction du taux d'apparition des madeleineaux a été statistiquement significative chez les deux sexes : dans le cas des mâles, il a été de 28 à 36 contre 43% chez les témoins, et dans le cas des femelles, de 3 à 4 contre 6% chez les témoins.[Traduit par la Rédaction] Duston and Saunders 207

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Section: Sea Cage Experimentssupporting

confidence: 54%

Effect of winter food deprivation on growth and sexual maturity of Atlantic salmon (Salmo salar) in seawater

Duston¹,

Saunders²

1999

Can. J. Fish. Aquat. Sci.

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“…The effects of food restriction in reproductive fish performance are still controversial (Townshend and Wooton, 1984;Ridelman et al, 1984;Thorpe et al, 1990;Jobling et al 1993;Reimers et al, 1993;Cerdá et al, 1994;Silverstein and Shimma, 1994;Karlsen et al, 1995;Toguyeni et al, 1996;Hopkins and Unwin 1997;Sohn et al, 1998;Collins and Anderson, 1999;Coward and Bromage, 1999;Duston and Saunders, 1999;Bromley et al, 2000;Carvalho, 2001) but the differences might come from the differences in the experimental design used in these studies (species, restriction and refeeding severity, season).…”

Section: Discussionmentioning

confidence: 99%

“…However, reduction in feeding rate has shown to inhibit gonadal maturation in salmonids (Thorpe et al 1990;Reimers et al, 1993;Hopkins and Unwin, 1997), Dicentrarchus labrax Linnaeus, 1758 (Cerdá et al 1994), and maturation of Scophthalmus maximus Linnaeus, 1758 females, but not males (Bromley et al, 2000). Females are believed to be more responsive to food restriction (Karlsen et al, 1995;Silverstein and Shimma, 1994;Duston and Saunders, 1999). On the other hand, feeding ratio reduction (cycles of 3 days fed/2 days unfed imposed throughout one year) did not affect gonadal development and plasma testosterone levels of Brycon amazonicus Spix and Agassiz, 1829 male and female (Carvalho, 2001).…”

Section: Introductionmentioning

confidence: 99%

Influence of food restriction on the reproduction and larval performance of matrinxã, Brycon amazonicus (Spix and Agassiz, 1829)

Camargo

Urbinati

2008

Braz. J. Biol.

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This work evaluated the effect of food restriction and refeeding of matrinxã females, Brycon amazonicus, on their reproductive performance and on the growth and survival of the progeny. Broodstocks were distributed in 8 earthen tanks (15 fish/tank) and fish from 4 tanks were fed daily (G1) while fish from the other 4 tanks were fed for 3 days and not fed for 2 days (G2) during 6 months prior to artificial spawning. Among the induced females, 57% in G1 group and 45% in G2 group spawned and the mean egg weights were 208.1 g (G1) and 131.6 g (G2). Oocytes of G2 fish were smaller (1.017 ± 0.003 mm) than oocytes of G1 fish (1.048 ± 0.002 mm). Fertilization (71.91 ± 12.6% and 61.18 ± 13.7%) and hatching (61.28 ± 33.9% and 67.50 ± 23.4%) rates did not differ between G1 and G2 fish. Larvae were collected at hatching and at 24, 48 and 72 hours of incubation and fixed for growth measurement. After incubation, fry were transferred to aquaria and sampled 1, 5, 9 and 15 days later. G1 and G2 larvae had similar weight (1.51 ± 0.15 and 1.46 ± 0.07 mg) but the G2 length was significantly higher (6.26 ± 0.13 and 6.74 ± 0.14 mm). By the ninth day of rearing, G2 fry had higher weight (13.6 ± 0.26 and 18.9 ± 0.07 mg) and length (11.8 ± 0.09 and 14.5 ± 0.04 mm) but by the fifteenth day, G1 fry had higher weight (90.2 ± 1.19 and 68.6 ± 0.77 mg) and length (18.8 ± 0.16 and 18.5 ± 0.04 mm) than G2 fry. By the ninth day of rearing, when fry are recommended to be transferred to outdoor tanks, G2 fry were larger and after 15 days, fry produced by restricted-fed females showed higher survival. The survival rate of G2 progeny by the fifteenth day was significantly higher (24.7 ± 2.07%) than that of G1 progeny (19.2 ± 1.91%). The ration restriction (35% reduction) imposed on matrinxã broodstock during 6 months prior to spawning reduced the number of spawned females and the egg amount, but it did not affect fertilization and hatching rates. Otherwise restricted-female larvae were larger and presented higher survival.Keywords: feeding restriction, reproductive performance, larval performance. Influência da restrição alimentar no desempenho reprodutivo e larval do matrinxã, Brycon amazonicus (Spix e Agassiz, 1829) ResumoEste estudo avaliou o efeito da restrição alimentar e realimentação na reprodução de fêmeas e no crescimento inicial e sobrevivência de larvas de matrinxã, Brycon amazonicus. Matrizes distribuídas em 8 viveiros (15 peixes/tanque) foram alimentadas diariamente (em 4 tanques -G1) e alimentados em ciclos de 3 dias de alimentação seguidos de 2 dias de restrição (em 4 tanques -G2) por 6 meses antes da desova. Na indução à desova, 57% das fêmeas no G1 e 45% no G2 desovaram. Os pesos médios dos oócitos foram 208,1 g (G1) e 131,6 g (G2), sendo os oócitos G2 menores (1,017 ± 0,003 mm) que os oócitos de G1 (1,048 ± 0,002 mm). As taxas de fertilização (71,9 ± 12,6% e 61,2 ± 13,7%) e de eclosão (61,3 ± 33,9% e 67,5 ± 23,4%) entre os G1 e G2 não diferiram. Larvas foram coletadas na eclosão e às 24, 48 e 72 horas de incubação para med...

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“…While there is a general awareness on the effects of fasting/starvation on fecundity, GSI, sexual maturation and temporal changes in the plasma concentrations of sex steroids in several temperate zone fish species like Amago salmon (Oncorhynchus masou ishikawae), Atlantic cod (Gadus morhua), perch (Macquaria ambigua), Atlantic salmon (Salmo salar), and Arctic charr, Salvelinus alpinus (Silverstein and Shimma, 1994;Karlsen et al, 1995;Collins and Anderson, 1999;Duston and Saunders, 1999;Frantzen et al, 2004), there is scarcity of information on the effects of partial and full feed restriction on the testicular activity of fish species in tropical/sub-tropical region with particular reference to different phases of the annual breeding cycle.…”

Section: Discussionmentioning

confidence: 99%

“…In fishes, food deprivation suppresses the plasma T 4 and T 3 levels, reduces thyroid tissue sensitivity to thyroid stimulating hormone (TSH), causes a reduction in 5'-monodeiodinase and eliminates the plasma thyroid hormone daily patterns (Eales et al, 1981;Flood and Eales, 1983;Shields and Eales, 1986;Cerda-Reverter et al, 1996;Power et al, 2000;Gaylord et al, 2001). Besides thyroid hormones, starvation has also been reported to affect reproductive function in different fish species (Silverstein and Shimma, 1994;Karlsen et al, 1995;Collins and Anderson, 1999;Duston and Saunders, 1999;Frantzen et al, 2004). However, these reports on the effects of feed restriction on the thyroid hormones and gonadal activity are limited to only a few temperate zone fish species and without any reference to the phases of the annual breeding cycle when the studies were conducted.…”

Section: Introductionmentioning

confidence: 99%

Effects of Partial and Full Feed Restriction on the Plasma Levels of Thyroid Hormones and Testicular Activity in the Male Air-breathing Catfish, Clarias gariepinus during Different Phases of the Breeding Cycle

Suchiang¹,

Gupta²

2011

IJB

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The effects of partial and full feed restriction on the plasma levels of thyroxine (T 4 ), triiodothyronine (T 3 ) and testicular activity were studied in the male air-breathing catfish, Clarias gariepinus. Partial and full feed restriction for 3 weeks significantly decreased the plasma T 4 levels during the progressive and breeding phases, and decreased the plasma T 3 levels only during the breeding phase. However, full feed restriction for 3 weeks increased plasma T 3 levels and T 3 /T 4 ratio during the quiescent, progressive and regressive phases. Histologically, 3 weeks of partial and full feed restriction markedly reduced the testicular activity during the progressive and breeding phases. These results indicate that partial and full feed restriction adversely affects the thyroid hormonogenesis and testicular activity in a phase-dependent manner in C. gariepinus.

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Effect of restricted feeding on early maturation in female and male amago salmon, Oncorhynchus masou ishikawae

Cited by 12 publications

References 0 publications

Effect of winter food deprivation on growth and sexual maturity of Atlantic salmon (Salmo salar) in seawater

Effect of winter food deprivation on growth and sexual maturity of Atlantic salmon (Salmo salar) in seawater

Influence of food restriction on the reproduction and larval performance of matrinxã, Brycon amazonicus (Spix and Agassiz, 1829)

Effects of Partial and Full Feed Restriction on the Plasma Levels of Thyroid Hormones and Testicular Activity in the Male Air-breathing Catfish, Clarias gariepinus during Different Phases of the Breeding Cycle

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