Control of maturation in masu salmon by manipulation of photoperiod

Takashima, Fumio; Yamada, Yuta

doi:10.1016/0044-8486(84)90026-7

Cited by 36 publications

(14 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The timing of maturation in salmonids is said to be most stimulated by an initial period of long days followed by a period of short days (Bromage et al, 1984;Elliott et al, 1984;Takashima and Yamada, 1984). In the present work, high levels of maturation were observed in the May photoperiod group confirming the importance of a reduction to short days in the control of maturation in parr development.…”

Section: Discussionsupporting

confidence: 75%

Photoperiodic effects on precocious maturation, growth and smoltification in Atlantic salmon, Salmo salar

Berrill

Porter

Smart³

et al. 2003

Aquaculture

View full text Add to dashboard Cite

Current Atlantic salmon farming practice induces early smoltification with artificial photoperiod regimes, however the importance of these photoperiods on parr maturation and interactions with smoltification are poorly understood. These questions were addressed in the present investigation, which examined the effects of photoperiod manipulation on the development, maturation and smoltification of individually tagged parr.

show abstract

Section: Discussionsupporting

confidence: 75%

Photoperiodic effects on precocious maturation, growth and smoltification in Atlantic salmon, Salmo salar

Berrill

Porter

Smart³

et al. 2003

Aquaculture

View full text Add to dashboard Cite

show abstract

“…V-84 Although it is believed that short photoperiods are important for accelerating gonadal recrudescence in salmonids Scott and Sumpter 1983;Takashima and Yamada 1984), prior exposure to long photoperiod is also important for the initiation of gonadal recrudescence, or at least for terminating a period of ovarian refractoriness Scott and Sumpter 1983;Bromage et aL 1984;Scott et al 1984;Takashima and Yamada 1984).…”

Section: Iv-84mentioning

confidence: 97%

Delayed gametogenesis and spawning of sea bass (Dicentrarchus labrax L.) kept under different photoperiod and temperature regimes

Zanuy

Carrillo

Ruiz

1986

Fish Physiol Biochem

View full text Add to dashboard Cite

The present work investigates the importance of day length and temperature in the control of reproduction of sea bass, as well as the effectiveness of LHRHa and HCG in inducing spawning out of season in this species. A controlled regime was produced and seasonal cycles with high components of temperature and photoperiod were extended from the summer solstice for at least 6 months, followed by a short photoperiod regime for 3 months before a new increase in these components. Natural spawning in the control fish occurred more frequently in mid February, although it was also observed in January and early March. Temperature manipulation delayed the spawning one month with respect to the controls, although some of the animals entered into gonadal regression. Photoperiodic manipulation delayed maturation for three months with respect to controls but it was necessary to perform hormonal induction of spawning. Although LHRHa and HCG were both applied, only intraperitoneal injections of LHRHa were effective in inducing spawning of sea bass out of season when the temperatures were 17°C. Dephasing between the annual changes in photoperiod in relation to the coordination of the different events of the sexual cycle of sea bass is considered.

show abstract

“…Therefore, the use of constant day length photoperiods was first investigated in rainbow trout culture in the early 1980s. Combinations of short day (6 h light:18 h dark, 6L:18D) and long days (18L:6D) were able to control spawning, providing advanced and delayed spawning times in a range of salmonids, including masu salmon (Takashima & Yamada ), Atlantic salmon (Taranger et al . , ), brown trout (Bromage et al .…”

Section: Broodstock Environmental and Hormonal Manipulationsmentioning

confidence: 99%

Gamete quality and broodstock management in temperate fish

Migaud

Bell

Cabrita

et al. 2013

Reviews in Aquaculture

236

152

View full text Add to dashboard Cite

The ability to fully control sexual maturation and spawning and to produce large numbers of high quality seeds 'on demand' (i.e. all year long) is a primary requirement for the successful development of aquaculture. This relies on optimal broodstock management practices based on extensive knowledge of the nutritional and environmental requirements of fish in captivity. However, for many established, emerging and new farmed fish species, such knowledge is limited or not available yet. The level of domestication also plays an essential role as stocks with improved traits in farming conditions are selected. Importantly, reliable indicators of egg quality are still lacking and hatcheries still rely on wild harvested broodstocks in many farmed fish species. These key challenges must be addressed urgently to ensure the sustainable development of the European fish farming sector. This review gives an overview of methods to assess egg/sperm quality and many of the most important factors affecting gamete production and quality, including broodstock nutrition, environmental and spawning induction protocols, genetic management, gamete preservation and new reproductive strategies.

show abstract

Control of maturation in masu salmon by manipulation of photoperiod

Cited by 36 publications

References 2 publications

Photoperiodic effects on precocious maturation, growth and smoltification in Atlantic salmon, Salmo salar

Photoperiodic effects on precocious maturation, growth and smoltification in Atlantic salmon, Salmo salar

Delayed gametogenesis and spawning of sea bass (Dicentrarchus labrax L.) kept under different photoperiod and temperature regimes

Gamete quality and broodstock management in temperate fish

Contact Info

Product

Resources

About