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Шадрин, А. М.; Ozernyuk, N. D.

doi:10.1023/a:1014916229219

Cited by 15 publications

(4 citation statements)

References 4 publications

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“…The gaping frequency is surprisingly high, often exceeding 200 times min 21 . We reasoned that this behaviour is unlikely to be solely due to respiration or ion-regulation needs of the larvae, because (i) the gill filaments are not yet fully developed at this early stage, which has been noted in several fish species including cichlids [29][30][31], (ii) the primary means of gas and ion exchange for young fish larvae is through the skin [30,32], and (iii) cichlid larvae develop an elaborate vascular system around their large yolk sac that greatly increases surface area for material exchange, and is thought to act as the primary respiratory organ through much of larval developmental [24,29]. While the evolutionary origins (and adaptive value) of this behaviour remain to be explored, we hypothesized that it may contribute to variation in early bone development, as mechanical-stress-induced bone deposition is well known in various vertebrates [33,34].…”

Section: Results and Discussion (A) Gaping Behaviour In Cichlid Larvaementioning

confidence: 99%

Baby fish working out: an epigenetic source of adaptive variation in the cichlid jaw

Albertson

2017

Proc. R. Soc. B.

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Understanding the developmental processes that underlie the production of adaptive variation (i.e. the 'arrival of the fittest') is a major goal of evolutionary biology. While most evo-devo studies focus on the genetic underpinnings of adaptive phenotypic variation, factors beyond changes in nucleotide sequence can also play a major role in shaping developmental outcomes. Here, we document a vigorous but enigmatic gaping behaviour during the early development of Lake Malawi cichlid larvae. The onset of the behaviour precedes the formation of bone, and we predicted that it might influence craniofacial shape by affecting the mechanical environment in which bone develops. Consistent with this, we found that both natural variation and experimental manipulation of this behaviour induced differential skeletal development that foreshadows adaptive variation in adult trophic morphology. In fact, the magnitude of difference in skeletal morphology induced by these simple shifts in behaviour was similar to those predicted to be caused by genetic factors. Finally, we demonstrate that this mechanical-load-induced shift in skeletal development is associated with differences in expression, a gene previously implicated in mediating between-species differences in skeletal shape. Our results underscore the complexity of development, and the importance of epigenetic ( Waddington) mechanisms in determining adaptive phenotypic variation.

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Section: Results and Discussion (A) Gaping Behaviour In Cichlid Larvaementioning

confidence: 99%

Baby fish working out: an epigenetic source of adaptive variation in the cichlid jaw

Albertson

2017

Proc. R. Soc. B.

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“…Embryo to larva transition includes the change from the provisional respiratory organs to those of the adult (Shadrin, 1996). Precocious gill formation detected in erythrinids occurs in species that live in low oxygen environments (Shadrin & Ozernyuk, 2002). The complete resorption of the yolk sac occurred more rapidly in H. unitaeniatus than H. malabaricus and H. lacerdae, the last having the highest growth rate during early development.…”

Section: Embryogenesis and Early Larval Developmentmentioning

confidence: 97%

Comparative oocyte morphology and early development in three species of trahiras from the São Francisco River basin, Brazil

Gomes

Scarpelli

Arantes

et al. 2007

Journal of Fish Biology

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Oocyte morphology, embryogenesis and early larval development were compared in Hoplerythrinus unitaeniatus, Hoplias lacerdae and Hoplias malabaricus (Characiformes: Erythrinidae) by macroscopical, histological, histochemical and ultrastructural analyses. The eggs of the three species were yellowish and adhesive, containing carboxyl and sulphate radicals in the glycoconjugates of the zona radiata. A complex surface arrangement was identified in oocytes of H. unitaeniatus and H. lacerdae, while H. malabaricus had a simple oocyte surface pattern. Lectin histochemistry revealed different carbohydrate terminal residues in cortical alveoli, outer zona radiata and follicular cells of the three species. At the animal pole, the oocyte surface topography surrounding the micropyle was species-specific. The micropylar cell was ConApositive, suggesting the presence of carbohydrates with mannose/glucose terminal residues that could have a role during fertilization. The erythrinids exhibited a prolonged embryonic and larval development compared to other Characiformes, a reproductive strategy used for increasing offspring protection. Early development proceeded most rapidly in H. unitaeniatus, followed by H. malabaricus and then H. lacerdae, which could have more developed parental care behaviour. An adhesive organ composed of secretory prismatic cells protruding from the cephalic region of the three erythrinid larva allowed them to attach to one another during development. Reproductive behaviour and early developmental strategies were similar in the three species, but the oocyte surface morphology suggests a close relationship between H. unitaeniatus and H. lacerdae.

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“…Gills form however quite tardily during zebrafish development [46,65]. Primary gill filaments only appear at 3 dpf and gills do not become functional for both oxygen uptake and ionoregulation until at least 14 dpf [46,65,77]. In absence of a fully mature respiratory organ, gas and ion exchanges take place on the larval skin [78,79].…”

Section: Plos Onementioning

confidence: 99%

Characterization of a member of the CEACAM protein family as a novel marker of proton pump-rich ionocytes on the zebrafish epidermis

et al. 2021

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In humans, several members of the CEACAM receptor family have been shown to interact with intestinal pathogens in an inflammatory context. While CEACAMs have long been thought to be only present in mammals, recent studies have identified ceacam genes in other vertebrates, including teleosts. The function of these related genes remains however largely unknown. To gain insight into the function of CEACAM proteins in fish, we undertook the study of a putative member of the family, CEACAMz1, identified in Danio rerio. Sequence analysis of the ceacamz1 gene product predicted a GPI-anchored extracellular protein containing eleven immunoglobulin domains but revealed no evident orthology with human CEACAMs. Using a combination of RT-PCR analyses and in situ hybridization experiments, as well as a fluorescent reporter line, we showed that CEACAMz1 is first expressed in discrete cells on the ventral skin of zebrafish larvae and later on in the developing gills. This distribution remains constant until juvenile stage is reached, at which point CEACAMz1 is almost exclusively expressed in gills. We further observed that at late larval stages, CEACAMz1-expressing cells mostly localize on the afferent side of the branchial filaments and possibly in the inter-lamellar space. Using immunolabelling and 3D-reconstructions, we showed that CEACAMz1 is expressed in cells from the uppermost layer of skin epidermis. These cells are embedded within the keratinocytes pavement and we unambiguously identified them as proton-pump rich ionocytes (HR cells). As the expression of ceacamz1 is turned on concomitantly to that of other known markers of HR cells, we propose that ceacamz1 may serve as a novel marker of mature HR cells from the zebrafish epidermis.

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Cited by 15 publications

References 4 publications

Baby fish working out: an epigenetic source of adaptive variation in the cichlid jaw

Baby fish working out: an epigenetic source of adaptive variation in the cichlid jaw

Comparative oocyte morphology and early development in three species of trahiras from the São Francisco River basin, Brazil

Characterization of a member of the CEACAM protein family as a novel marker of proton pump-rich ionocytes on the zebrafish epidermis

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