The evolution of exceptional diversity in parental care and fertilization modes in ray-finned fishes DOI Creative Commons
Balázs Vági, Gergely Katona, Óscar García-Miranda

et al.

Evolution, Journal Year: 2024, Volume and Issue: 78(10), P. 1673 - 1684

Published: June 27, 2024

Among vertebrates, ray-finned fishes (Actinopterygii) display the highest diversity in parental care, and their diversification has been hypothesized to be related phylogenetic changes fertilization modes. Using most comprehensive, sex-specific data from 7,600 species of 62 extant orders fishes, we inferred ancestral states transitions among care types caring episodes (i.e., stage offspring development). Our work uncovered 3 novel findings. First, different male-only female-only biparental no care) are common, frequencies these show unusually diverse patterns concerning modes (external, or internal via oviduct, mouth, brood pouch). Second, both oviduct mouth selected for female-biased whereas a pouch is male-biased care. Importantly, without extremely unstable phylogenetically. Third, that egg sexes associated with nest building (which male-biased) fry female-biased). Taken together, aquatic environment, which supports considerable flexibility facilitated parenting behavior, creating evolutionary bases more comprehensive protect semiterrestrial terrestrial environments.

Language: Английский

Structural changes to the brood pouch of male pregnant seahorses (Hippocampus abdominalis) facilitate exchange between father and embryos DOI
Jessica S. Dudley, Philip C Hannaford, Samson N. Dowland

et al.

Placenta, Journal Year: 2021, Volume and Issue: 114, P. 115 - 123

Published: Sept. 3, 2021

Language: Английский

Citations

23
Embryonic specializations for vertebrate placentation DOI Creative Commons
Camilla M. Whittington, Alice L. Buddle, Oliver W. Griffith

et al.

Philosophical Transactions of the Royal Society B Biological Sciences, Journal Year: 2022, Volume and Issue: 377(1865)

Published: Oct. 17, 2022

The vertebrate placenta, a close association of fetal and parental tissue for physiological exchange, has evolved independently in sharks, teleost fishes, coelacanths, amphibians, squamate reptiles mammals. This transient organ forms during pregnancy is an important contributor to embryonic development both viviparous oviparous, brooding species. Placentae may be involved transport respiratory gases, wastes, immune molecules, hormones nutrients. Depending on the taxon, portion placenta comprised either extraembryonic membranes (yolk sac or chorioallantois) temporary tissues derived via hypertrophy pericardium, gill epithelium, gut, tails fins. These have been recruited convergently into placentae several lineages. Here, we highlight diversity common features placentation suggest future studies that will provide new knowledge about evolution pregnancy. article part theme issue ‘Extraembryonic tissues: exploring concepts, definitions functions across animal kingdom’.

Language: Английский

Citations

16
Improvements to the Gulf pipefish Syngnathus scovelli genome DOI Creative Commons
Balan Ramesh, Clayton M. Small, Hope M. Healey

et al.

Gigabyte, Journal Year: 2023, Volume and Issue: 2023, P. 1 - 11

Published: Jan. 20, 2023

The Gulf pipefish Syngnathus scovelli has emerged as an important species for studying sexual selection, development, and physiology. Comparative evolutionary genomics research involving fishes from Syngnathidae depends on having a high-quality genome assembly annotation. However, the first S. assembled using short-read sequences smaller RNA-sequence dataset limited contiguity relatively poor Here, PacBio long-read high-fidelity proximity ligation library, we generate improved to obtain 22 chromosome-level scaffolds. Compared assembly, gaps in are smaller, N75 is larger, our ~95% BUSCO complete. Using large body of RNA-Seq reads different tissue types NCBI's Eukaryotic Annotation Pipeline, discovered 28,162 genes, which 8,061 non-coding genes. Our new annotation tagged RefSeq by NCBI provide enhanced resources work scovelli..

Language: Английский

Citations

8
Paternal nutrient provisioning during male pregnancy in the seahorse Hippocampus abdominalis DOI

Zoe M. G. Skalkos,

James U. Van Dyke, Camilla M. Whittington

et al.

Journal of Comparative Physiology B, Journal Year: 2020, Volume and Issue: 190(5), P. 547 - 556

Published: July 2, 2020

Language: Английский

Citations

22
A Multidisciplinary Experimental Study on the Effects of Breeders Diet on Newborn Seahorses (Hippocampus guttulatus) DOI Creative Commons
Miquel Planas, Ike Olivotto, María J. González

et al.

Frontiers in Marine Science, Journal Year: 2020, Volume and Issue: 7

Published: July 31, 2020

The global trade in seahorses is increasing and new rearing techniques are currently available for a few species. One of the main bottlenecks seahorse production reproductive success, which dependent upon administration high quality diets to breeders. However, little known about most adequate diets, on how they should be administered might affect newborn performance. In this study, three homogeneous groups adult Hippocampus guttulatus were maintained captivity. Each group was fed one following since onset breeding period: unenriched Artemia (Diet A), mysidaceans AM) M). As positive control, wild pregnant male used. mixed diet AM provided highest overall success reasonable fatty acid profiles, better resembled from male. use solely M) worse results spite DHA content. Significant differences observed characteristics profiles among dietary along season, especially total n-3 HUFA DHA. Monospecific including or very likely suffered nutritional deficiencies, reflected morphological alterations muscle tissue (diet A) abnormal early mortalities Three progressive stages identified whole initial capital-income period (100 – 120 days period), followed by an inflexion (short transitional stage - income sources), finally long characterized sources exhaustion body reserves. Special attention deserved changes resulting decrease Considering time required newborn, we recommend breeders at least months prior period.

Language: Английский

Citations

21
Immunological tolerance in the evolution of male pregnancy DOI Creative Commons
Jamie Parker, Arseny Dubin, Ralf Schneider

et al.

Molecular Ecology, Journal Year: 2021, Volume and Issue: 32(4), P. 819 - 840

Published: Dec. 24, 2021

The unique male pregnancy in pipefishes and seahorses ranges from basic attachment (pouch-less species: Nerophinae) of maternal eggs to specialized internal gestation pouched species (e.g. Syngnathus Hippocampus) with many transitions between. Due this diversity, offers a platform for assessing physiological molecular adaptations evolution. These insights will contribute answering long-standing questions why how evolved convergently so vertebrate systems. To understand the congruencies disparities evolution, we compared transcriptome-wide differentially expressed genes four syngnathid species, at stages (nonpregnant, early, late parturition). Across all forms, metabolic processes immune dynamics defined stages, especially shared expression features akin female pregnancy. observed downregulation adaptive early-stage its reversed upregulation during late/parturition most notably Hippocampus, combined directionless pouch-less suggests modulation be restricted that placenta-like We propose increased foeto-paternal intimacy syngnathids commands suppression early gestation, elevated response parturition coincides pouch opening reduced progeny reliance. Immune regulation supports recently described functional MHC II pathway loss as critical independent co-option similar pathways both highlights crucial evolutionary establishment

Language: Английский

Citations

20
Distinguishing Between Embryonic Provisioning Strategies in Teleost Fishes Using a Threshold Value for Parentotrophy DOI Creative Commons

Zoe M. G. Skalkos,

James U. Van Dyke, Camilla M. Whittington

et al.

Biomolecules, Journal Year: 2023, Volume and Issue: 13(1), P. 166 - 166

Published: Jan. 13, 2023

The source of embryonic nutrition for development varies across teleost fishes. A parentotrophy index (ratio neonate: ovulated egg dry mass) is often used to determine provisioning strategy, but the methodologies vary studies. variation in and preservation tissue, staging embryos, estimation approach impedes our ability discern between methodological biological differences indices inter- intra-specifically. threshold value distinguish lecithotrophy (0.6-1) differs considerably lack a standardised definition application has contributed inconsistent classifications strategy. Consistency both methodology obtain index, classification strategy using are essential reliably strategies teleosts. We discuss alternative methods determining suggest consistent standards obtaining interpreting indices.

Language: Английский

Citations

7
Brooding fathers actively consume viable embryos to take up nutrients in a monogamous syngnathid fish DOI Creative Commons

Tingting Lin,

Xin Liu, Siping Li

et al.

Frontiers in Marine Science, Journal Year: 2024, Volume and Issue: 11

Published: June 21, 2024

Syngnathid fishes often experience a reduction in brood size and an increase immunity during pregnancy. Researchers have studied the polygamous broad-nosed pipefish ( Syngnathus typhle ) revealed that some eggs from low-quality females male’s pouch serve as nurse are absorbed by father. It is unclear whether also exist other syngnathid fishes, especially monogamous fishes. In male only carries single female. Thus, question remains: do of eggs? And if so, these impaired eggs, or they viable consumed brooding father? present study, we used lined seahorse Hippocampus erectus asked this species. We explored potentially originate versus inviable eggs. Using isotope labeling, found nutrients embryos could be transferred to fathers. Furthermore, fathers with limited food had higher content smaller compared individuals sufficient food. These results demonstrated seahorse, suggested actively consume absorb response low availability. findings help us better understand parent–embryo conflict, filial cannibalism, male-only care teleost

Language: Английский

Citations

2
Growth dynamics and molecular bases of evolutionary novel jaw extensions in halfbeaks and needlefishes (Beloniformes) DOI Creative Commons
Ralf Schneider, Helen M. Gunter,

Inken Salewski

et al.

Molecular Ecology, Journal Year: 2023, Volume and Issue: 32(21), P. 5798 - 5811

Published: Sept. 26, 2023

Evolutionary novelties-derived traits without clear homology found in the ancestors of a lineage-may promote ecological specialization and facilitate adaptive radiations. Examples for such novelties include wings bats, pharyngeal jaws cichlids flowers angiosperms. Belonoid fishes (flying fishes, halfbeaks needlefishes) feature an astonishing diversity extremely elongated jaw phenotypes with undetermined evolutionary origins. We investigate development halfbeak (Dermogenys pusilla) needlefish (Xenentodon cancila) using morphometrics, transcriptomics situ hybridization. confirm that these fishes' are composed distinct base novel 'extension' portions. These extensions morphologically unique to belonoids, we describe growth dynamics both bases throughout early studied species. From transcriptomic profiling, deduce extension outgrowth is guided by populations multipotent cells originating from anterior tip dentary. shielded differentiation, but proliferate migrate anteriorly during extension's allometric phase. Cells left behind at leave zone undergo differentiation into osteoblast-like cells, which deposit extracellular matrix bone cartilage characteristics mineralizes thereby provides rigidity. Such has akin histological observations on 'kype' process lower male salmon, may hint common conserved regulatory underpinnings. Future studies will evaluate molecular pathways govern migration proliferation underlying belonoids' extensions.

Language: Английский

Citations

6
Identification of neurohypophysial hormones and the role of VT in the parturition of pregnant seahorses (Hippocampus erectus) DOI Creative Commons
Huixian Zhang, Yali Liu, Geng Qin

et al.

Frontiers in Endocrinology, Journal Year: 2022, Volume and Issue: 13

Published: July 29, 2022

Neurohypophysial hormones regulate the reproductive behavior of teleosts; however, their role in gestation and parturition ovoviviparous fishes with male pregnancy (syngnathids) remains to be demonstrated. In present study, complementary DNA (cDNA) sequences arginine vasotocin (VT) isotocin (IT) from lined seahorse (Hippocampus erectus) were cloned identified. We observed that mature core peptides VT IT conserved among teleosts. phylogenic tree, clustered independently teleost IT. The tissue distribution patterns similar, both highly expressed brain, gills, gonads. Interestingly, they also some extent brood pouch. situ hybridization revealed messenger RNA (mRNA) signals brain mainly located preoptic area region hypothalamus. Intraperitoneal administration peptide pregnant seahorses induced premature parturition, stimulated gonadotropin release, increased serum estrogen levels, decreased prolactin secretion. Moreover, injection upregulated mRNA expression membrane receptor summary, neurohypophysial promote by regulating synthesis through hypothalamus-pituitary-gonad axis.

Language: Английский

Citations

9