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Coward, Kevin; Bromage, Niall

doi:10.1023/a:1008942318272

Cited by 102 publications

(13 citation statements)

References 122 publications

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“…The higher survival found in fish cultured in the dark regardless of the temperature are in agreement with previous findings (Appelbaum and McGeer 1998a;Appelbaum and Kamler 2000;Adewolu et al 2008) that demonstrated that larval behavior ensures growth in an environment most conducive for survival. Further studies indicate that photoperiod and temperature are among factors that regulate such behavior (Coward and Bromage 2000;Bromage et al 2001). In nature, the African catfish is known to spawn in flooded streams, and fertilized eggs attach to reeds and grasses, providing darker conditions.…”

Section: Discussionmentioning

confidence: 99%

Combined effects of photoperiod and temperature on growth and survival of African catfish (Clarias gariepinus, Burchell 1822) larvae under laboratory conditions

Okoth

Orina

Rasowo

et al. 2016

Journal of Applied Aquaculture

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The effect of photoperiod (24L:00D, 12L:12D, and 00L:24D) and temperature (22 ± 1°C and 28 ± 1°C) on performance of Clarias gariepinus larvae was tested. Larvae weighing 3.2 ± 0.24 mg were cultured in aquaria at a stocking density of 20 fish L −1 and fed twice a day on catfish starter diet (40% CP) at 10 % BW day −1 . Highest mean weight gain (31.00 mg), SGR (7.56% day −1 ), and survival (83%) were achieved at photoperiod and temperature combination of 00L:24D and 28 ± 1°C. Percent survival of larvae differed significantly (p < .05) among treatments with optimal survival of (83%) in treatment combination of 28 ± 1°C and 00L:24D, while lowest survival (40%) in treatment combination of 22 ± 1°C and 24L:00D.

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Section: Discussionmentioning

confidence: 99%

Combined effects of photoperiod and temperature on growth and survival of African catfish (Clarias gariepinus, Burchell 1822) larvae under laboratory conditions

Okoth

Orina

Rasowo

et al. 2016

Journal of Applied Aquaculture

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“…The Nile tilapia Oreochromis niloticus (Linnaeus, 1758) is one of the most cultivated fish species in the world and has often been used in experimental studies on reproductive physiology and development, due to its ease of breeding in captivity (Coward & Bromage, 2000;FAO, 2018). As well as in other teleost species, follicular atresia in Nile tilapia occurs during follicular growth but is more frequent in vitellogenic follicles that were not spawned in the reproductive season (Miranda, Bazzoli, Rizzo, & Sato, 1999;Santos et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Autophagy and Cathepsin D mediated apoptosis contributing to ovarian follicular atresia in the Nile tilapia

Sales

Melo

Pinheiro

et al. 2019

Molecular Reproduction Devel

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Follicular atresia is a hormonally controlled degenerative process involving apoptosis of the somatic and germ cells. Since different signaling pathways can induce cell death, the aim of the present study was to investigate cell death signaling and crosstalk between autophagic, apoptotic, and lysosomal proteins during follicular atresia in Nile tilapia. For this, females were kept in controlled conditions for 21 days, and ovary samples were collected weekly. The atretic follicles (AF) were analyzed in three regression phases: Early, advanced, and late. Under electron microscopy, the follicular cells exhibited numerous protein synthesis organelles in the early AF. Immunoreactivity for Bcl2, Beclin1, Lc3, and Cathepsin D increased significantly in advanced AF (p < .001), when follicular cells were in intense yolk phagocytosis. In this phase, autophagosomes and autolysosomes were frequently observed. In the late AF, follicular cells had a markedly electron‐lucid cytoplasm and immunoreactivity for Bax and TUNEL assay indicated an elevated apoptosis rate. Colocalisation of Lamp1/Cathepsin D and Lc3/Caspase‐3 suggests dynamic crosstalk between the autophagy, apoptosis, and lysosome pathways. Taken together, the data indicate that autophagy plays a role in the homeostasis and clearance of the follicular cells preceding Cathepsin D mediated apoptosis during follicular atresia in Nile tilapia.

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“…The tilapia species, especially O. mossambicus, are characterized by their easy adaptability to various environmental conditions, and an exceptional tolerance to high salinity (Kamal & Mair, 2005). The ease of propagation makes tilapia one of the most preferred cultured food fish worldwide, with an annual production of over 850 metric tonnes (Coward & Bromage, 2000). Tilapia species consume a wide variety of natural food sources, exhibit a rapid growth rate and as a consequence, tilapia can attain sexual maturity in less than four months, and they spawn easily in captivity.…”

Section: Introductionmentioning

confidence: 99%

Hepatic and Haemato-biochemical Alterations in Juvenile Mozambique tilapia (Oreochromis mossambicus) on Pawpaw (Carica papaya) Seed Meal

Omeje¹,

Lambrechts²,

Brink³

2019

JAS

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Pawpaw seed meal (PSM) can be used as an antifertility agent in animals, however there is no information on its potential toxicological effect on Mozambique tilapia (O. mossambicus). In this study the effect of PSM on the liver, blood haematological and biochemical parameters of O. mossambicus juveniles was assessed to ascertain its suitability as a reproductive suppressant. The PSM was administered at an inclusion level of 10 g and 30 g/kg of a commercial tilapia diet (basal diet, BD) for 30 and 60 days, respectively. The potential toxicological effect was assessed by determining the extent of change in the normal haematological (RBC count, haematocrit, haemoglobin, MCV, MCH, MCHC, thrombocyte count, absolute WBC and differential cell counts) and biochemical (cholesterol, total protein, albumin, globulin and glucose) parameters. Haematological and biochemical profiles of different treatment groups did not differ throughout the course of the investigation. Liver weight and hepatosomatic index values of the treated fish were comparable to those of the control. The absence of any effect of the blood parameters measured in this study also indicate that PSM has no compromising influence on the immune system of the fish, indicating that PSM can be considered as a safe alternative to induce masculinization in Mozambique tilapia, and therefore act as a reproductive inhibitor.

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Cited by 102 publications

References 122 publications

Combined effects of photoperiod and temperature on growth and survival of African catfish (Clarias gariepinus, Burchell 1822) larvae under laboratory conditions

Combined effects of photoperiod and temperature on growth and survival of African catfish (Clarias gariepinus, Burchell 1822) larvae under laboratory conditions

Autophagy and Cathepsin D mediated apoptosis contributing to ovarian follicular atresia in the Nile tilapia

Hepatic and Haemato-biochemical Alterations in Juvenile Mozambique tilapia (Oreochromis mossambicus) on Pawpaw (Carica papaya) Seed Meal

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