Breeding system, shell size and age at sexual maturity affect sperm length in stylommatophoran gastropods

Schmera, Dénes; Pizá, Julia; Reinartz, Ellen; Ursenbacher, Sylvain; Baur, Bruno

doi:10.1186/s12862-016-0661-9

Cited by 6 publications

(3 citation statements)

References 100 publications

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“…Subramoniam, 18 reported that, most of the hermaphroditic animals undergoes cross fertilization to acquire genetic diversity. Preponderantly cross-fertilization was found in many gastropodan species 19 . Nakadera and Koene 20 reported that internal fertilization was mostly found in gastropods but some sea, freshwater and land snail gastropods were also undergo for external fertilization.…”

Section: Resultsmentioning

confidence: 99%

Assessment of Reproductive and Regenerative Potency In Some Selected Molluscan Species

2020

JCBSC

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Reproduction is physiological mechanism to show the regenerative potency among the animals. Present work focus on reproductive and regenerative potency in selected molluscan species under maintained laboratory conditions. Molluscs were selected for differences with their special accent on mode of fecundity, fertilization, embryological development and hatching process. Some of the molluscs were hermaphrodite. Animals were collected from two different ecosystems viz; terrestrial and freshwater. Under the laboratory conditions, three molluscan species-Semperula maculata (terrestrial slug), Macrochlamys indica (terrestrial snail) and Bellamya bengalensis (freshwater snail) were comparatively studied for their regenerative capabilities regarding egg laying capacity, hatching etc,. The oviparity type of reproduction was found in terrestrial molluscs, Semperula maculata and Macrochlamys indica, while mechanism of viviparity was observed in aquatic snail Bellamya bengalensis. Present study highlights differences in eggs, embryonic development and adults with their survivility. Study was discussed with the comparative account of embryological steps among the aquatic and terrestrial molluscs. Total data was interpreted for capabilities of regenerative potency and developmental biology in molluscan species regarding their better survivility in the ecosystem to maintain food chain.

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Section: Resultsmentioning

confidence: 99%

Assessment of Reproductive and Regenerative Potency In Some Selected Molluscan Species

2020

JCBSC

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“…DNA sequences from a further 86 representatives of the Orthalicoidea were obtained Gen-Bank stemming from the works of [6,7], as well as [9][10][11][13][14][15][16][17] (Table 2). Representatives of Achatinidae and Strophocheilidae were included as outgroup to root the trees (Tables 1 and 2).…”

Section: Methodsmentioning

confidence: 99%

Molecular phylogeny of the Orthalicoidea land snails: Further support and surprises

et al. 2023

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The superfamily Orthalicoidea comprises approximately 2,000 species of terrestrial gastropods, mostly concentrated in the Neotropics but also present in southern Africa and Oceania. We provide a multi-marker molecular phylogeny of this superfamily, reassessing its family- and genus-level classification. We exclude two families from the group, Odontostomidae and Vidaliellidae, transferring them to Rhytidoidea based on their phylogenetic relationships as recovered herein. Two new families are recognized herein as members of Orthalicoidea, Tomogeridae and Cyclodontinidae fam. nov. The family Megaspiridae and the subfamily Prestonellinae are paraphyletic but are retained herein for taxonomic stability. The subfamily Placostylinae is synonymized with Bothriembryontinae. The new genera Alterorhinus gen. nov. and Sanniostracus gen. nov. containing some Brazilian species are described here to better reflect the phylogeny. The fossil record and paleobiogeographic history of the group is explored under the new phylogenetic framework.

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“…Female polyandry is predicted to promote not only the evolution of larger testes and thereby ejaculate quantities, but also higher-quality (e.g., longer tails and faster) sperm (Fitzpatrick et al 2009;Schmera et al 2016).…”

Section: Outer Dense Fiber Proteinmentioning

confidence: 99%

Genome-wide ancestry and introgression in a Zambian baboon hybrid zone

Chiou

Bergey

Burrell

et al. 2019

Preprint

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Hybridization in nature offers unique insights into the process of natural selection in incipient species and their hybrids. In order to evaluate the patterns and targets of selection, we examine a recently discovered baboon hybrid zone in the Kafue River valley of Zambia, where Kinda baboons (Papio kindae) and gray-footed chacma baboons (P. ursinus griseipes) coexist with hybridization. We genotyped baboons at 14,962 variable genome-wide autosomal markers using double-digest RADseq. We compare ancestry patterns from this genome-wide dataset to previously reported ancestry from mitochondrial-DNA and Y-chromosome sources. We also fit a Bayesian genomic cline model to scan for genes with extreme patterns of introgression. We show that the Kinda baboon Y chromosome has penetrated the species boundary to a greater extent than either mitochondrial DNA or the autosomal chromosomes. We also find evidence for overall restricted introgression in the JAK/STAT signaling pathway. Echoing results in other species including humans, we find evidence for enhanced and/or directional introgression of immune-related genes or pathways including the toll-like receptor pathway, the blood coagulation pathway, and the LY96 gene. Finally we show enhanced introgression and excess chacma baboon ancestry in the sperm tail gene ODF2. Together, our results elucidate the dynamics of introgressive hybridization in a primate system while highlighting genes and pathways under selection. evaluating the actions of selection on species-specific traits (Barton & Hewitt 1989; Harrison 1990) including aspects of physiology, morphology, and behavior. At the DNA level, natural selection impacts the patterns by which genetic regions are exchanged between hybridizing lineages, with the direction and rate of introgression influenced by their selective advantage or disadvantage in differentiated genomic backgrounds (Gompert & Buerkle 2011). Regions containing variants that reduce the fitness of hybrids, for example, experience limited penetration of species boundaries while regions containing variants that increase the fitness of hybrids experience more rapid penetration of species boundaries. The latter process characterizes adaptive introgression (Hedrick 2013).Our present study centers on a hybrid zone between Kinda (Papio kindae) and gray-footed chacma baboons (P. ursinus griseipes) in the Kafue River valley in central Zambia ( Figure S1). Here, the distributions of the two species adjoin in and around the area of Kafue National Park, with Kinda and chacma baboons occupying respectively the northern and southern areas of the region. After previous speculation regarding potential overlap

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Breeding system, shell size and age at sexual maturity affect sperm length in stylommatophoran gastropods

Cited by 6 publications

References 100 publications

Assessment of Reproductive and Regenerative Potency In Some Selected Molluscan Species

Assessment of Reproductive and Regenerative Potency In Some Selected Molluscan Species

Molecular phylogeny of the Orthalicoidea land snails: Further support and surprises

Genome-wide ancestry and introgression in a Zambian baboon hybrid zone

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