Boletín de la Sociedad Zoológica del Uruguay, Journal Year: 2023, Volume and Issue: 32(1)
Published: Nov. 1, 2023
In this article, the capture of two pregnant females Brazilian Guitarfish, Pseudobatos horkelii, is recorded. Although species Critically Endangered and it prohibited, illegal catches occur nevertheless.
Language: Английский
Biological reviews/Biological reviews of the Cambridge Philosophical Society, Journal Year: 2024, Volume and Issue: 99(4), P. 1314 - 1356
Published: April 1, 2024
ABSTRACT The reproductive diversity of extant cartilaginous fishes (class Chondrichthyes) is extraordinarily broad, reflecting more than 400 million years evolutionary history. Among their many notable specialisations are viviparity (live‐bearing reproduction) and matrotrophy (maternal provision nutrients during gestation). However, attempts to understand the evolution these traits have yielded highly discrepant conclusions. Here, we compile analyse current knowledge on in Chondrichthyes with particular foci frequency, phylogenetic distribution, directionality changes modes reproduction. To characterise transformations, amassed largest empirical data set parameters date covering nearly 800 species analysed it via a comprehensive molecular‐based phylogeny. Our reconstructions indicated that ancestral pattern for ‘short single oviparity’ (as found holocephalans) which females lay successive clutches (broods) one or two eggs. Viviparity has originated at least 12 times, 10 origins among sharks, batoids, (based published evidence) another potential origin fossil holocephalan. Substantial evolved six including placentotrophy, three separate oophagy (egg ingestion), histotrophy (uptake uterine secretions). In clades, placentation was replaced by histotrophy. Unlike past reconstructions, our analysis reveals no evidence ever reverted oviparity this group. Both arisen variety sequences. addition, given rise distinct egg‐laying patterns increased clutch (brood) size and/or involved deposition eggs advanced stages development. Geologically, oviparous arose Paleozoic. Most Mesozoic, while few represented low taxonomic levels Cenozoic origin. Coupled other recent work, review points way towards an emerging consensus chondrichthyans offering basis future functional analyses. This also contributes conservation efforts highlighting taxa whose reflect distinctive trajectories deserve special protection further investigation.
Language: Английский
Citations
10
The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 948, P. 174798 - 174798
Published: July 15, 2024
Language: Английский
Citations
3
Marine Pollution Bulletin, Journal Year: 2023, Volume and Issue: 195, P. 115535 - 115535
Published: Sept. 13, 2023
Language: Английский
Citations
7
Journal of Fish Biology, Journal Year: 2024, Volume and Issue: 105(3), P. 988 - 992
Published: May 27, 2024
Abstract The elucidation of energetic patterns in adult viviparous elasmobranchs and their offspring can contribute to understanding ecophysiological questions, such as maternal‐fetal metabolism group life‐history traits. We characterized the substrates pregnant individuals stages development freshwater stingray Potamotrygon amandae . Our results show that distribution yolk is composed more lipids than proteins, whereas inverse pattern observed egg uterus, proving plasticity energy provision species. As a novelty, we describe yolk/intestine transfer occurs this
Language: Английский
Citations
0
bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown
Published: Oct. 13, 2024
Abstract Microbes are acquired through vertical and environmental horizontal transmission. Vertical transmission is directly linked to reproductive success entails early transmission, facilitating coexistence of host microbes over generations. The multiple potentially interacting routes challenging be disentangled in conventional sex-role species, as they mostly intermingled on the maternal side, i.e., egg production, pregnancy, birth postnatal care. evolution male pregnancy syngnathids (pipefishes seahorses) offers an opportunity separate microbial provisioning (maternal) from (paternal). We experimentally evaluated existence role paternal microbiota offspring development colonization. Male pipefish were exposed antibiotics, subsequently recolonized with bacteria paternal, maternal, origin (spike treatment). After microbiome (16s rRNA) developing was repeatedly ribotyped. Paternal antibiotic spike treatments influenced composition brood pouch development. treatment gave a kickstart life by reducing duration inducing survival. Expanding how distinct shape will foster our understanding holobiont function health disease.
Language: Английский
Citations
0
Boletín de la Sociedad Zoológica del Uruguay, Journal Year: 2023, Volume and Issue: 32(1)
Published: Nov. 1, 2023
In this article, the capture of two pregnant females Brazilian Guitarfish, Pseudobatos horkelii, is recorded. Although species Critically Endangered and it prohibited, illegal catches occur nevertheless.
Language: Английский
Citations
0