Results 51 to 60 of about 390,311 (303)

The adaptability of facultative parthenogenesis and ‘multiple embryos per eggcase’ as alternative reproductive strategies in Chondrichthyes

Royal Society Open Science
Chondrichthyans (sharks, rays and chimaera) are a fascinating case study through which to examine reproductive biology. While most vertebrate lineages have converged upon either placental viviparity or oviparity, chondrichthyans exhibit unparalleled ...
Joel Harrison Gayford
doaj   +1 more source

Parasite and reproductive features of Scinax nasicus (Anura: Hylidae) from a South American subtropical area [PDF]

, 2009
Desde febrero de 2002 a diciembre de 2004, se analizó la fauna de helmintos parásitos y las características reproductivas de Scinax nasicus en un área cercana a la ciudad de Corrientes, Argentina.
Duré Pitteri, Marta Inés, Gonzalez, Cynthya Elizabeth, Hamann, Mónika Inés, Kehr, Arturo Ignacio, Schaefer, Eduardo Federico   +4 more
core  

Mapping the evolution of mitochondrial complex I through structural variation

FEBS Letters, EarlyView.
Respiratory complex I (CI) is crucial for bioenergetic metabolism in many prokaryotes and eukaryotes. It is composed of a conserved set of core subunits and additional accessory subunits that vary depending on the organism. Here, we categorize CI subunits from available structures to map the evolution of CI across eukaryotes. Respiratory complex I (CI)
Dong‐Woo Shin, Tingting Chen, James A. Letts   +2 more
wiley   +1 more source

Egg retention and intrauterine embryonic development in Sceloporus aeneus (Reptilia: Phrynosomatidae): implications for the evolution of viviparity Retención de huevos y avance embrionario intrauterino en Sceloporus aeneus (Reptilia: Phrynosomatidae): implicaciones para la evolución de la viviparidad

Revista Mexicana de Biodiversidad, 2012
Egg retention (ER) and intrauterine embryonic development (IED) have been considered intermediate steps in the evolution from oviparity to viviparity. Sceloporus aeneus is an oviparous lizard that is closely related to the viviparous species (Sceloporus ...
Rodolfo García-Collazo, Maricela Villagrán-Santa Cruz, Eduardo Morales-Guillaumin, Rubi Nelsi Meza Lázaro, Fausto R. Méndez-de la Cruz   +4 more
doaj  

Detection of Gene Flow from Sexual to Asexual Lineages in Thrips tabaci (Thysanoptera: Thripidae). [PDF]

PLoS ONE, 2015
Populations of Thrips tabaci are known to have two sympatric but genetically isolated reproductive modes, arrhenotoky (sexual reproduction) and thelytoky (asexual reproduction).
Xiao-Wei Li, Ping Wang, Jozsef Fail, Anthony M Shelton   +3 more
doaj   +1 more source

Isolation, culture and characterization of Arsenophonus symbionts from two insect species reveal loss of infectious transmission and extended host range

Frontiers in Microbiology, 2023
Vertically transmitted “Heritable” microbial symbionts represent an important component of the biology and ecology of invertebrates. These symbioses evolved originally from ones where infection/acquisition processes occurred within the environment ...
Pol Nadal-Jimenez, Steven R. Parratt, Stefanos Siozios, Gregory D. D. Hurst   +3 more
doaj   +1 more source

The effect of grass genotype and spring management on the nutritive value of mid-summer ryegrass swards [PDF]

, 2008
End of project reportThe objective of this project was to investigate the environmental, morphological and management factors that control reproductive initiation and development in Lolium perenne L. (perennial ryegrass) and their influence on mid-season
Gilliland, Trevor, Hurley, Grainne, O'Donovan, Michael   +2 more
core  

Polytraits : a database on biological traits of marine polychaetes [PDF]

, 2014
The study of ecosystem functioning – the role which organisms play in an ecosystem – is becoming increasingly important in marine ecological research. The functional structure of a community can be represented by a set of functional traits assigned to ...
Arvanitidis, Christos, Chatzigeorgiou, Georgios, Chatzinikolaou, Eva, Dailianis, Thanos, Fanini, Lucia, Faulwetter, Sarah, Keklikoglou, Kleoniki, Koulouri, Panayota, Markantonatou, Vasiliki, Pafilis, Evangelos, Papageorgiou, Nafsika, Pavloudi, Christina, Vasileiadou, Katerina   +12 more
core   +4 more sources

Enteropathogenic E. coli shows delayed attachment and host response in human jejunum organoid‐derived monolayers compared to HeLa cells

FEBS Letters, EarlyView.
Enteropathogenic E. coli (EPEC) infects the human intestinal epithelium, resulting in severe illness and diarrhoea. In this study, we compared the infection of cancer‐derived cell lines with human organoid‐derived models of the small intestine. We observed a delayed in attachment, inflammation and cell death on primary cells, indicating that host ...
Mastura Neyazi, Pilar Samperio Ventayol, Natalie Burkard, Nicolas Schlegel, Carmen Aguilar, Sina Bartfeld   +5 more
wiley   +1 more source

Sexual Size Dimorphism in Rays and Skates (Elasmobranchii: Batoidea)

Ecology and Evolution
Sexual size dimorphism (SSD) is a widely observed but poorly understood phenomenon in which male and female animals differ in body size (e.g., length or mass).
Joel H. Gayford, Scott G. Seamone, Duncan J. Irschick, Andrew Chin, Jodie L. Rummer   +4 more
doaj   +1 more source