Effect of photoperiod on locomotor activity, growth, feed efficiency and gonadal development of Nile tilapia

Veras, Galileu Crovatto; Murgas, Luís David Solis; Rosa, Philippe; Zangerônimo, Márcio Gilberto; Ferreira, Matheus Soares da Silva; Leon, Jonathan Antonio Solis-De

doi:10.1590/s1516-35982013001200002

Cited by 37 publications

(28 citation statements)

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“…As demonstrated in the present study with severum larvae, the photoperiod did not influence the survival rate of Nile tilapia (El-Sayed and Kawanna, 2004;Veras et al, 2013c), silver catfish (Rhamdia quelen) (Piaia et al, 1999), tambaqui (Colossoma macropomum) juveniles (Mendonça et al, 2012), burbot (Lota lota) juveniles (Trejchel et al, 2013), or Pyrrhulina brevis (Veras et al, 2016). In these cases, the manipulation of the photoperiod probably did not alter the homeostasis of these species and did not change in studies with fingerlings of Persian sturgeon (Acipenser persicus) (Zolfaghari et al, 2011) and Nile tilapia (Veras et al, 2013c).…”

Section: Resultssupporting

confidence: 62%

“…In these cases, the manipulation of the photoperiod probably did not alter the homeostasis of these species and did not change in studies with fingerlings of Persian sturgeon (Acipenser persicus) (Zolfaghari et al, 2011) and Nile tilapia (Veras et al, 2013c).…”

Section: Resultsmentioning

confidence: 94%

“…In these studies, the high mortality in dark environments is attributed to a reduced ability of larvae to find food (Reynalte-Tataje et al, 2002;Shan et al, 2008). In addition, for species that utilize vision to catch their food, exposure and movement of prey are key stimuli for the detection and recognition of food (ReynalteTataje et al, 2002;Veras et al, 2013c;Veras et al, 2016).…”

Section: Resultsmentioning

confidence: 99%

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Influence of photoperiod on growth, uniformity, and survival of larvae of the Amazonian ornamental Heros severus (Heckel, 1840)

et al. 2016

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Section: Resultssupporting

confidence: 62%

Section: Resultsmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 99%

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Influence of photoperiod on growth, uniformity, and survival of larvae of the Amazonian ornamental Heros severus (Heckel, 1840)

et al. 2016

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“…Além disso, o fotoperíodo influencia tanto na estratégia alimentar como no estímulo das atividades metabólicas de vários peixes 7,8 . Para algumas espécies, dias ou fotoperíodos longos podem modificar indiretamente o crescimento, seja pela indução ao aumento do consumo de ração, desenvolvimento da massa muscular devido à maior atividade locomotora dos animais [9][10][11][12] , melhor eficiência na utilização dos nutrientes 6,13 e / ou devido ao redirecionamento da energia proveniente da maturação gonadal para o crescimento somático 9,14,15 .…”

Section: Introductionunclassified

Efeito do fotoperíodo sobre a composição do filé de juvenis de tilápia do Nilo

et al. 2014

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Com este estudo objetivou-se avaliar o efeito do fotoperíodo sobre a composição centesimal de filés de juvenis de tilápia do Nilo. Utilizou-se um delineamento inteiramente casualizado com cinco tratamentos (0L:24E; 6L:18E; 12L:12E; 18L:6E; 24L:0E) e quatro repetições. Foram utilizados 160 alevinos de tilápia, distribuídos em 20 aquários (20L) em sistema de recirculação, temperatura controlada em 27 ºC e densidade de oito peixes por aquário. Os peixes foram alimentados duas vezes ao dia, com ração comercial extrusada contendo 40% de proteína bruta. Ao final de 75 dias, amostras do filé foram coletadas e armazenadas em freezer (-80 ºC) para posteriores análises da composição bromatológica. Não houve efeito dos diferentes fotoperíodos sobre a umidade e cinzas do filé (P>0,05). Por outro lado, os peixes sob fotoperíodo de 18L:6E apresentaram maior quantidade de proteína e retenção desta no filé, assim como menor quantidade de gordura e retenção de lipídeo (P<0,05). Portanto, pode-se concluir que o fotoperíodo pode alterar a composição corporal de alevinos de tilápia do Nilo, sendo que e o fotoperíodo de 18L:6E contribui para o aumento da concentração de proteína bruta e uma menor deposição de gordura no filé.

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“…The fish feed uptake rate (i.e., the percentage of feed the fish actually consume) was assumed being 95% (Timmons and Ebeling, 2013). (Veras et al, 2013) Given these parameters, the optimization experiment that has been conducted with AnyLogic with the decision variable "amount of fish" suggested to start with 60 fingerlings to gain a fish biomass of approximately 50 kg·m −3 fishes per tank after 200 days.…”

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Opportunities and Challenges of Multi-Loop Aquaponic Systems

Goddek

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v Preface Which of us is not familiar with this situation during the student time: on a Wednesday night, one wants to go out to grab a beer ("just one Duveltje") with friends. Until the end of the night (and several beers later) one was trapped in several discussions about religion, politics, and one's field of study. I have to admit, that I have been involved in plenty of such discussions, which also stems from the fact that I am a very discussion-friendly and curious person. However, I caught myself often saying the same sentence "well, the idea is great, but it actually does not really work as it should" with respect to two topics: Aquaponics and Communism. This might appear to be a somewhat far-fetched statement, however, for those who have neither read Marx nor followed the development of aquaponics the last 30 years: in a nutshell it can be stated that both of these ideas follow bottom-up (i.e. local and circular) approaches (i.e. for small farmers and individuals).Additionally to the above, I honestly believe that in times of the financial crisis -in which multinational corporations such as [think of big corporations that produce GMO seeds that are immune to their pesticides] increase their quasi-monopoly positions on the global food market -a paradigm shift back to human-centred and sustainable agricultural development is required to ensure both (1) healthy (i.e. pesticide free) diets and (2) food independence. In contrast, organic, fair trade, and GMO-free food have recently gained rapidly increasing popularity. Consumers want transparent and extensive information about the origin and manufacture of the foodstuffs they buy. The development of agriculture and how to use (finite) resources efficiently will be crucial with respect to the global development and the future of the earth in general. Right now, we are at a crossroads in our history that will determine whether either the people or the corporations will be empowered. I intended to provocatively illustrate this new class conflict on the book cover with the objective to polarize and thus energize the readers themselves to make thoughts and reflections.So far, I have dedicated over 4 years of my life to study and improve aquaponic systems in the hope that one day their production efficiency will be able to compete with state-of-theart hydroponic food production systems, while improving circularity. In this thesis, I will try to demonstrate why aquaponics does not face the same pitfalls as communism, while sharing the empowering people-minded and bottom-up qualities that are required in the 21st century.

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Effect of photoperiod on locomotor activity, growth, feed efficiency and gonadal development of Nile tilapia

Cited by 37 publications

References 34 publications

Influence of photoperiod on growth, uniformity, and survival of larvae of the Amazonian ornamental Heros severus (Heckel, 1840)

Influence of photoperiod on growth, uniformity, and survival of larvae of the Amazonian ornamental Heros severus (Heckel, 1840)

Efeito do fotoperíodo sobre a composição do filé de juvenis de tilápia do Nilo

Opportunities and Challenges of Multi-Loop Aquaponic Systems

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