Reproduction of the invasive fan wormBranchiomma bairdi(Polychaeta: Sabellidae)

Autor:	Beatriz Yáñez-Rivera, María Ana Tovar-Hernández, José Luis Bortolini-Rosales
Rok vydání:	2011
Předmět:	Larva Ecology media_common.quotation_subject Sabellidae fungi Aquatic Science Biology Oceanography Annual cycle biology.organism_classification Hermaphrodite Abundance (ecology) Benthic zone Reproduction Ecology Evolution Behavior and Systematics Gametogenesis media_common
Zdroj:	Marine Biology Research. 7:710-718
ISSN:	1745-1019 1745-1000
DOI:	10.1080/17451000.2010.547201
Popis:	The fan worm Branchiomma bairdi has been introduced to the Gulf of California from its original distribution in the Caribbean Sea, and is now a conspicuous component of most benthic communities. Study of reproductive features is essential to understand the dispersion capability of B. bairdi and its invasive potential. Sampling was carried out monthly in the port of Mazatlan during 2009 (23°12′13′′N, 106°24′31.4′′W). Abundance and biomass were measured. Sex and maturity were determined. Gametogenesis and observations on the spawning, fertilization, larval development and brooding are presented. The highest values of abundance (>2500 worms m−2) and biomass (175 g m−2) occurred during August and September. Mature simultaneous hermaphrodite worms were found continuously throughout the annual cycle as well as asexual forms. In B. bairdi gametogenesis is extra-ovarian. Three posterior thoracic segments and all abdominal segments are involved in the production of gametes. Sperm are ect-aquasperm type (f...
Databáze:	OpenAIRE
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