Stress response of red sea bream Pagrus major to acute handling and chronic photoperiod manipulation

Biswas, Amal; Seoka, Manabu; Takii, Kenji; Maita, Masashi; Kumai, Hidemi

doi:10.1016/j.aquaculture.2005.06.043

Cited by 71 publications

(62 citation statements)

References 25 publications

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“…The highest glucose concentration (up to 61.8 ± 2.55 mg dL -1 ) was reached within 1 h, and it started to decline at 24 h. The glucose concentration decreased to the control group level (25.4 ± 3.86 mg dL -1 ) at 72 h. Biswas et al (28) reported similar results in red sea bream (Pagrus major). Acute stress caused an increase in the glucose level in red sea bream; the level began to decline 24 h later and returned to the normal level 72 h later.…”

Section: Discussionsupporting

confidence: 68%

The physiological stress response to acute thermal exposure inBlack Sea trout (Salmo trutta labrax Pallas, 1814)

Balta¹,

Akhan²,

Balta³

2017

Turk J Vet Anim Sci

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In this study, we aimed to investigate the acute stress responses of Black Sea trout to acute thermal fluctuations. Black Sea trout (184.22 g mean weight) were transferred from a private trout farm to a research center and restocked in a fiberglass square tank. After acclimation to culture conditions (at a water temperature of 15 °C) for 2 weeks, the fish in the experiment were exposed to 25 °C water temperature for 30 min, and the stress responses of the fish were examined at 1, 3, 6, 12, 24, 36, 48, and 72 h. After acute thermal shock, cortisol and glucose levels increased during the first hour in the experimental group. However, cortisol and glucose levels returned to their normal values after 6 and 36 h, respectively. Lysozyme activity decreased at 3 h and rose to its normal level at 12 h after the experiment. Total protein and serum ion concentrations were also affected and fluctuated due to acute thermal stress. Short-term acute thermal exposure also caused a serum ionic imbalance in the trout, but homeostasis was restored at 72 h.

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Section: Discussionsupporting

confidence: 68%

The physiological stress response to acute thermal exposure inBlack Sea trout (Salmo trutta labrax Pallas, 1814)

Balta¹,

Akhan²,

Balta³

2017

Turk J Vet Anim Sci

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“…Diversos fatores ambientais têm demonstrado serem potenciais fontes de estresse em peixes (Barton, 1997;Biswas et al, 2006a). No entanto, apesar de a manipulação do fotoperíodo trazer certas mudanças, como nos níveis de determinados hormônios e atividade locomotora diária, poucos são os relatos em que o estresse é demonstrado como consequência dessa manipulação (Biswas et al, 2004(Biswas et al, , 2006a.…”

Section: Resultsunclassified

Fotoperíodo sobre parâmetros fisiológicos relacionados ao estresse em alevinos de tilápia-do-nilo

Veras

Murgas

Zangerônimo

et al. 2013

Arq. Bras. Med. Vet. Zootec.

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RESUMOCom este trabalho objetivou-se avaliar a influência de diferentes fotoperíodos sobre parâmetros fisiológicos relacionados ao estresse em alevinos de tilápia-do-nilo (Oreochromis niloticus). Foi utilizado um delineamento inteiramente casualizado, com cinco tratamentos (0L; 6L; 12L; 18L; 24L) e quatro repetições, sendo o aquário a unidade experimental. Cento e sessenta alevinos de tilápia, 3,21±0,05g e 4,35±0,07cm, foram distribuídos em 20 aquários de 20 litros, em sistema de recirculação com temperatura controlada em 27 o C e densidade de oito peixes por aquário. Por um período de 75 dias, a alimentação foi realizada duas vezes ao dia com ração extrusada contendo 40% de proteína bruta. Ao final do período experimental, os dados de crescimento, sobrevivência, cortisol, glicose e hematócrito foram submetidos à análise de variância e, posteriormente, em caso de significância (P<0,05), foi realizado um teste Tukey a 5% para comparação das médias. A manipulação do fotoperíodo demonstra não alterar a homeostase dos alevinos, uma vez que não há diferença sobre a sobrevivência, glicose sanguínea, hematócrito e cortisol plasmático (P>0,05). (0L, 6L, 12L, 18L, 24L) Palavras-chave: cortisol, glicose, homeostase, Oreochromis niloticus ABSTRACT The objective of this study was to evaluate the influence of different photoperiods on physiological parameters related to stress in Nile tilapia fingerlings (Oreochromis niloticus). A completely randomized design with five treatments

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“…Nevertheless, in another Fish Physiol Biochem (2006) 32:113-120 117 study carried out at the same time, these same fish showed (towards the end of the LD 24:0 protocol) increased numbers of immature erythrocytes at the same maturational stage, suggesting that erythropoiesis was actually depressed and not stimulated (Valenzuela et al 2006). Consequently, the acute stress induced by constant light, as described by Biswas et al (2006), may have stimulated the release of mature and immature erythrocytes from the spleen into circulation by splenic contraction Itazawa 1989, 1990), thereby increasing the haematocrit values and total erythrocyte numbers. It is difficult to explain why haemoglobin concentrations did not increase in a similar manner as the other two parameters.…”

Section: Discussionmentioning

confidence: 75%

“…Increases in haematological parameters, such as erythrocyte number, haematocrit, haemoglobin concentration and leucopenia, are now recognized as secondary stress indicators (Wedemeyer et al 1990;Wojtaszek et al 2002;Pierson et al 2004). However, Biswas et al (2006) was unable to find evidence of chronic stress in artificial photoperiod-treated red sea bream (Pagrus major). On the other hand, haematological parameters can be related directly or indirectly to biological functions like immunocompetence (leukocytes), respiratory metabolism (erythrocytes) and haemostasis (thrombocytes).…”

Section: Introductionmentioning

confidence: 89%

Effects of constant light on haematological parameters of cultured rainbow trout (Oncorhynchus mykiss) in the Southern Hemisphere

Valenzuela

Silva

Klempau

2006

Fish Physiol Biochem

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The effects of artificial photoperiod regimes on reproductive patterns have been studied in several species, as have haematological parameters. However, information on how artificial photoperiods may affect blood components is scarce, especially under field conditions. We have assessed the effects of constant light [long day (LD) photoperiod: 24 h (light):0 h (dark)] on haematological parameters of cultured rainbow trout in Chile (Southern Hemisphere). In the initial stage (March up to June), two groups of fish were maintained under similar conditions and under the ambient (natural) photoperiod (NP). One group was then placed under the LD photoperiod regime for 2 months (June/July), following which it was returned to the NP (August-January); the control group remained under the NP throughout the experiment (March-January). All fish were assessed for haematological parameters and growth performance at various times during the experiment. During the initial stage, no differences were found between groups. However, at the end of the LD 24:0 period, the LD fish had increased haematocrit values and erythrocyte numbers and diminished mean corpuscular haemoglobin. After the LD fish had been returned to the NP, they developed secondary sexual characteristics and had a 40-44% decrease in the number of leukocytes.

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Stress response of red sea bream Pagrus major to acute handling and chronic photoperiod manipulation

Cited by 71 publications

References 25 publications

The physiological stress response to acute thermal exposure inBlack Sea trout (Salmo trutta labrax Pallas, 1814)

The physiological stress response to acute thermal exposure inBlack Sea trout (Salmo trutta labrax Pallas, 1814)

Fotoperíodo sobre parâmetros fisiológicos relacionados ao estresse em alevinos de tilápia-do-nilo

Effects of constant light on haematological parameters of cultured rainbow trout (Oncorhynchus mykiss) in the Southern Hemisphere

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