Comportamento do camarão em diferentes substratos nas fases clara e escura do dia

Abstract

Resumo -O objetivo deste trabalho foi avaliar o efeito do tipo de substrato sobre a preferência, o enterramento e a atividade natatória de camarões (Litopenaeus vannamei). Juvenis (0,93±0,29 g) e adultos machos e fêmeas (10,05±1,18 g) foram observados durante 24 horas, por meio do método animal focal, com registros instantâneos. Foram testadas as seguintes granulometrias (tratamentos) dos substratos: I, 100% C; II, 50% C + 50% B; III, 50% A + 50% C; IV, 100% B; V, 50% B + 50% A; e VI, 100% A, em que as letras referemse ao diâmetro médio das partículas, A = 0,25-2,0 mm; B = 0,0625-0,25 mm; e C = <0,0625 mm. Foram aplicados seis tratamentos com 18 repetições para cada categoria: camarões juvenis, machos e fêmeas. Cada indivíduo foi exposto por 24 horas aos seis tipos de substrato, simultaneamente, e o seu comportamento foi observado nas fases clara e escura do dia. A natação ocorreu principalmente na fase escura e o enterramento, na fase clara, no substrato IV. Os camarões juvenis e adultos (machos ou fêmeas) preferem o substrato composto de areia fina e muito fina (0,0625-0,25 mm), tanto para permanência quanto para enterramento.Termos para indexação: Litopenaeus vannamei, bem-estar animal, carcinicultura, etologia aplicada. Shrimp behavior in different substrates in light and dark phases of the dayAbstract -The objective of this work was to evaluate the effect of substrate type on the preference, burial, and natatory activity of shrimp (Litopenaeus vannamei). Juvenile (0.93±0.29 g) and adult males and females (10.05±1.18 g) were observed during 24 hours using the focal animal method, with instantaneous recording. The following soil granulometries (treatments) were tested: I, 100% C; II, 50% C + 50% B; III, 50% A + 50% C; IV, 100% B; V, 50% B + 50% A; and VI, 100% A, in which the letters reffer to particle mean diameter, A = 0.25-2.0 mm, B = 0.0625-0.25 mm, and C = <0.0625 mm. Six treatments were applied with 18 replicates for each category: juvenile, male, and female shrimp. Each individual was simultaneously exposed for 24 hours to the six types of substrates, and its behavior was observed in the light and dark phases of the day. Swimming occurred mainly during the dark phase, and burial in the light phase in substrate IV. The juvenile and adult shrimp (male or female) prefer substrate composed of fine and very fine sand (0.0625-0.25 mm), both for residence and for burial.

Behavior activities of Macrobrachium rosenbergii (De Man, 1879) in monosex and mixed populations, in the laboratory

“…Similar behavior has been J Anim Behav Biometeorol (2018) 6:33-40 registered by Pontes et al (2006) and Santos et al (2013) with regards to L. vannamei. Reports on inactivity are more frequent during the dark phase, with the exception of the monosex all-female population.…”

“…Ethological studies have been applied to shrimp farming Arruda 2005a, 2005b;Pontes et al 2006;Lima et al 2009;Silva et al 2012;Santos et al 2013;Silva and Arruda 2014;Santos et al 2015;Santos and Pontes 2016), particularly for freshwater shrimps of the genus Macrobrachium. In fact, several research works deal with the prawn´s morphology (Brody et al 1980;Cohen et al 1981;Ra'Anan and Cohen 1985;Ra'Anan and Sagi 1985;Kuris et al 1987;Ra'Anan et al 1991), agonism (Barki et al 1991;Sousa and Singer-Brugiolo 2001;Balasundaram et al 2004;Short 2004;Karplus 2005), zootechnical performance (Du and Niu 2003;Lan et al 2006) and animal performance in monosex cultures (Nair et al 2006;Santos et al 2015).…”

Behavior activities of Macrobrachium rosenbergii (De Man, 1879) in monosex and mixed populations, in the laboratory

“…The prawns explored the environment homogeneously at all periods and in all three culture systems (mixed, monosex all male and monosex all-female). Similar behavior has been doi.org/10.31893/2318-1265jabb.v6n2p33-40 J Anim Behav Biometeorol (2018) 6:33-40 registered by Pontes et al (2006) and Santos et al (2013) with regards to L. vannamei. Reports on inactivity are more frequent during the dark phase, with the exception of the monosex all-female population.…”

“…Ethological studies have been applied to shrimp farming Arruda 2005a, 2005b;Pontes et al 2006;Lima et al 2009;Silva et al 2012;Santos et al 2013;Silva and Arruda 2014;Santos et al 2015;Santos and Pontes 2016), particularly for freshwater shrimps of the genus Macrobrachium. In fact, several research works deal with the prawn´s morphology (Brody et al 1980;Cohen et al 1981;Ra'Anan and Cohen 1985;Ra'Anan and Sagi 1985;Kuris et al 1987;Ra'Anan et al 1991), agonism (Barki et al 1991;Sousa and Singer-Brugiolo 2001;Balasundaram et al 2004;Short 2004;Karplus 2005), zootechnical performance (Du and Niu 2003;Lan et al 2006) and animal performance in monosex cultures (Nair et al 2006;Santos et al 2015).…”

“…Since prawns have different habitats throughout their life cycle and, consequently, migrate between several habitats, displacement is one of the basic parameters that affect their survival. This is true for migratory species, particularly performance, swimming speed and climate conditions which determine migration limits and the time required for such movements (Dall et al 1990;Pontes et al 2006;Freire et al 2011;Santos et al 2013).…”