التفاصيل البيبلوغرافية
| العنوان: |
Multiple evolutionary transitions of reproductive strategies in a phylum of aquatic colonial invertebrates. |
| المؤلفون: |
Grant, Heather E., Ostrovsky, Andrew N., Jenkins, Helen L., Vieira, Leandro M., Gordon, Dennis P., Foster, Peter G., Kotenko, Olga N., Smith, Abigail M., Berning, Björn, Porter, Joanne S., Souto, Javier, Florence, Wayne K., Tilbrook, Kevin J., Waeschenbach, Andrea |
| المصدر: |
Proceedings of the Royal Society B: Biological Sciences; 11/1/203, Vol. 290 Issue 2010, p1-12, 12p |
| مصطلحات موضوعية: |
BIOLOGICAL fitness, MOLECULAR phylogeny, BRYOZOA, ANIMAL clutches, INCUBATORS, GUT microbiome |
| مستخلص: |
Parental care is considered crucial for the enhanced survival of offspring and evolutionary success of many metazoan groups. Most bryozoans incubate their young in brood chambers or intracoelomically. Based on the drastic morphological differences in incubation chambers across members of the order Cheilostomatida (class Gymnolaemata), multiple origins of incubation were predicted in this group. This hypothesis was tested by constructing a molecular phylogeny based on mitogenome data and nuclear rRNA genes 18S and 28S with the most complete sampling of taxa with various incubation devices to date. Ancestral character estimation suggested that distinct types of brood chambers evolved at least 10 times in Cheilostomatida. In Eucratea loricata and Aetea spp. brooding evolved unambiguously from a zygote-spawning ancestral state, as it probably did in Tendra zostericola, Neocheilostomata, and 'Carbasea' indivisa. In two further instances, brooders with different incubation chamber types, skeletal and non-skeletal, formed clades (Scruparia spp., Leiosalpinx australis) and (Catenicula corbulifera (Steginoporella spp. (Labioporella spp., Thalamoporella californica))), each also probably evolved from a zygote-spawning ancestral state. The modular nature of bryozoans probably contributed to the evolution of such a diverse array of embryonic incubation chambers, which included complex constructions made of polymorphic heterozooids, and maternal zooidal invaginations and outgrowths. [ABSTRACT FROM AUTHOR] |
|
Copyright of Proceedings of the Royal Society B: Biological Sciences is the property of Royal Society and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Complementary Index |
