Diet, growth and recruitment of wild zebrafish in Bangladesh

Spence, Rowena; Fatema, Mst. Kaniz; Ellis, Stephen; Ahmed, Zoarder Faruque; Smith, Carl

doi:10.1111/j.1095-8649.2007.01492.x

Cited by 96 publications

(94 citation statements)

References 10 publications

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“…Zebrafish is considered to have a wide thermal tolerance zone (72) and lives in the 16.5 to 38.6°C range of temperature in the wild (73,74). Interestingly, the elevated temperature used in this study, 36°C, falls within the above range.…”

Section: Discussionmentioning

confidence: 87%

Heat-induced masculinization in domesticated zebrafish is family-specific and yields a set of different gonadal transcriptomes

Ribas

Liew

Díaz

et al. 2017

Proc. Natl. Acad. Sci. U.S.A.

119

136

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Understanding environmental influences on sex ratios is important for the study of the evolution of sex-determining mechanisms and for evaluating the effects of global warming and chemical pollution. Fishes exhibit sexual plasticity, but the underlying mechanisms of environmental effects on their reproduction are unclear even in the well-established teleost research model, the zebrafish. Here we established the conditions to study the effects of elevated temperature on zebrafish sex. We showed that sex ratio response to elevated temperature is family-specific and typically leads to masculinization (female-to-male sex reversal), resulting in neomales. These results uncovered genotype-by-environment interactions that support a polygenic sex determination system in domesticated (laboratory) zebrafish. We found that some heat-treated fish had gene expression profiles similar to untreated controls of the same sex, indicating that they were resistant to thermal effects. Further, most neomales had gonadal transcriptomes similar to that of regular males. Strikingly, we discovered heat-treated females that displayed a normal ovarian phenotype but with a "male-like" gonadal transcriptome. Such major transcriptomic reprogramming with preserved organ structure has never been reported. Juveniles were also found to have a male-like transcriptome shortly after exposure to heat. These findings were validated by analyzing the expression of genes and signaling pathways associated with sex differentiation. Our results revealed a lasting thermal effect on zebrafish gonads, suggesting new avenues for detection of functional consequences of elevated temperature in natural fish populations in a global warming scenario.A major paradox in developmental biology is the lack of conservation of sex-determining mechanisms even in closely related taxa (1). Thus, in mammals and birds, sex is genetically canalized by a chromosomal sex determination (CSD) system of male (XX/XY in mammals) or female (ZW/ZZ in birds) heterogamety, driven by the action of a master sex-determining gene: sry in mammals and dmrt1 in birds (1). In contrast, fish sex can be very plastic, with the combination of genetic and environmental influences (2). In addition to fish species with CSD, there are species with polygenic sex determination (PSD), in which sex depends on the combined action of several promale and profemale genetic factors, and species with temperature-dependent sex determination (TSD) (3). Understanding how the environment influences sex ratios in vertebrates is of fundamental importance in the study of the evolution of sex-determining mechanisms (4, 5). It is also of practical relevance in evaluating the effects of climate change and chemical pollution (6, 7).The effects of temperature on gene expression during sex differentiation have been investigated in different teleost species, including the African catfish, Clarias gariepinus (8), European sea bass, Dicentrarchus labrax (9, 10), Japanese flounder, Paralichthys olivaceus (11), pejerrey, Odontesthes...

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Section: Discussionmentioning

confidence: 87%

Heat-induced masculinization in domesticated zebrafish is family-specific and yields a set of different gonadal transcriptomes

Ribas

Liew

Díaz

et al. 2017

Proc. Natl. Acad. Sci. U.S.A.

119

136

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show abstract

“…Apparently wild zebrafish are generalists, consuming a wide variety of benthic and planktonic crustaceans, worms and insect larvae (Dutta 1993). McClure et al (2006) and Spence et al (2007) analyzed gut contents of sampled zebrafish in natural habits and found that insects, mostly of terrestrial origin, were the predominant prey; the diet also included a small percentage of plankton, whose main components identified were zooplankton and insects (58.6%), invertebrate eggs and arachnids (2.5%), phytoplankton (5.9%) and other unidentified components (33%). Zebrafish in captivity may be fed with live prey such as brine shrimp (Artemia sp.…”

Section: Diet Of the Zebrafishmentioning

confidence: 99%

Zebrafish as a model organism for nutrition and growth: towards comparative studies of nutritional genomics applied to aquacultured fishes

Ulloa

Iturra

Neira

et al. 2011

Rev Fish Biol Fisheries

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Zebrafish (Danio rerio) is a common research model in fish studies of toxicology, developmental biology, neurobiology and molecular genetics; it has been proposed as a possible model organism for nutrition and growth studies in fish. The advantages of working with zebrafish in these areas are their small size, short generation time (12-14 weeks) and their capacity to produce numerous eggs (100-200 eggs/clutch). Since a wide variety of molecular tools and information are available for genomic analysis, zebrafish has also been proposed as a model for nutritional genomic studies in fish. The detailed study of every species employed as a model organism is important because these species are used to generalize how several biological processes occur in related organisms, and contribute considerably toward improving our understanding of the mechanisms involved in nutrition and growth. The objective of this review is to show the relevant aspects of the nutrition and growth in zebrafish that support its utility as a model organism for nutritional genomics studies. We made a particular emphasis that gene expression and genetic variants in response to zebrafish nutrition will shed light on similar processes in aquacultured fish.

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“…Previous research has documented that zebrafish consume bacteria in the wild. 38 It would stand to reason then that microflora growing on feed and other organic waste would serve as supplemental nutrition for laboratory-reared zebrafish. The system used in this study incorporated self-cleaning tanks containing baffles at the back end of the tank for facilitating solids removal.…”

Section: Fig 2 Gonadosomatic Index (Gsi) Of Zebrafish Males (A)mentioning

confidence: 99%

Feed and Feeding Regime Affect Growth Rate and Gonadosomatic Index of Adult Zebrafish (Danio Rerio)

Gonzales

Law²

2013

Zebrafish

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A 5-week study was conducted to evaluate commercially available Artemia, Ziegler zebrafish diet, and Calamac diet fed in five different feeding regimes on the growth and reproductive development of 7-month-old zebrafish. Zebrafish were fed to satiation three times daily during the normal work week and twice daily during the weekend and holidays. Zebrafish in dietary groups CCC (Calamac three times daily) and CCA (Calamac twice daily, Artemia once daily) had a significantly ( p < 0.05) greater weight gain and specific growth rate as compared to all other dietary groups. Male zebrafish in dietary group 5 had significantly larger gonadosomatic index (GSI) values than all other groups, while female zebrafish in dietary group CCC had significantly larger GSI values than all other groups. No differences in the fatty acid content of female gonads were detected. Zebrafish fed solely Artemia had the greatest weight loss and lowest GSI values. Preliminary evidence of protein sparing in zebrafish is reported. Collectively, this study sheds more light into the effects of the use of commercially available feeds and feeding regime on the rearing of zebrafish.

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Diet, growth and recruitment of wild zebrafish in Bangladesh

Cited by 96 publications

References 10 publications

Heat-induced masculinization in domesticated zebrafish is family-specific and yields a set of different gonadal transcriptomes

Heat-induced masculinization in domesticated zebrafish is family-specific and yields a set of different gonadal transcriptomes

Zebrafish as a model organism for nutrition and growth: towards comparative studies of nutritional genomics applied to aquacultured fishes

Feed and Feeding Regime Affect Growth Rate and Gonadosomatic Index of Adult Zebrafish (Danio Rerio)

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