Aspectos da reprodução e dinâmica populacional de Chione pubera (Bory Saint-Vicent) (Bivalvia, Veneridae) no sul do Brasil
Material collected with a 2-meter wide beam trawl during eight surveys conducted from December 1995 to February 1997 was used for a first preliminary description of the reproduction and population dynamics of the edible venerid bivalve Chione pubera (Bory Saint-Vicent, 1827). Greatest catches were found between 30 to 35 meters depth, on fine sandy bottoms with a mud content lower than 10%. Dry weight meat condition index showed highest values during autumn and lowest values from winter to summer months. Histological analysis of gonadal tissue showed a continuous reproduction, with peaks of maturation on autumn and spring, Spawning was related with the increase of water temperature, that occurs twice a year in the region as a consequence of a particular hydrological characteristic of the inner continental shelf. Size frequency distribution showed a unique principal mode with slow if any displacement through time, indicating a long lived species.
| Main Authors: | , , , |
|---|---|
| Format: | Digital revista |
| Language: | Portuguese |
| Published: |
Sociedade Brasileira de Zoologia
2001
|
| Online Access: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000200003 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|