Wiley is a global provider of content and content-enabled workflow solutions in areas of scientific, technical, medical, and scholarly research professional development and education. The Division of Invertebrate Zoology of the Society for Integrative and Comparative Biology joins with AMS in promoting the journal, which is co-published with Blackwell Publishing. For 100 years (1895-1995) the title was Transactions of the American Microscopical Society it has since been published under the title Invertebrate Biology to reflect its current broad scope on the biology of invertebrate animals. The journal, published by the American Microscopical Society (AMS), ranks among the oldest continuously published journals in the United States, having been in existence since 1880. All contributions undergo a thorough process of peer-review. Invertebrate Biology (IB) presents original research and review papers on all aspects of invertebrate biology-morphology and ultrastructure genetics, phylogenetics, and evolution physiology and ecology neurobiology, behavior, and biomechanics reproduction and development cell and molecular biology-and on all types of invertebrates: protozoan and metazoan, aquatic and terrestrial, free-living and symbiotic. These traits may have arisen as adaptations to epibenthic life in a high-latitude deep-sea environment affected by seasonal pulses of organic matter. Leptoecia vivipara is argued to be a progenetic species with juvenile-like external morphology and accelerated sexual maturation. Chaetal replacement in juveniles and the morphology of the provisional maxillae are described. Mature oocytes freely floated in the coelomic fluid, while embryos and juveniles were enclosed in peritoneal envelopes. In adults, the mid-body region formed a chamber containing up to 12 offspring at different stages of development, from oocyte to 13 chaetigers. Anterior segments of juvenile and adult worms bore paired compact ovaries with clusters of vitellogenic oocytes. All specimens examined were brooding viviparous females or juveniles no male gametes were detected. Development of Leptoecia vivipara, a brooding deep-sea onuphid polychaete with a circum-Antarctic distribution, was studied using light microscopy, scanning and transmission electron microscopy, and histology.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |