Growth and reproductive biology of the sea star Astropecten aranciacus (Echinodermata, Asteroidea) on the continental shelf of the Catalan Sea (northwestern Mediterranean)

被引:9
作者
Baeta, Marc [1 ,2 ]
Galimany, Eve [1 ,3 ]
Ramon, Montserrat [1 ,3 ]
机构
[1] CSIC, Inst Ciencies Mar, Passeig Maritim Barceloneta 37-49, E-08003 Barcelona, Spain
[2] Univ Autonoma Barcelona, Campus Bellaterra,Edifici B, E-08193 Barcelona, Spain
[3] Inst Espanol Oceanog, Ctr Oceanog Balears, Moll Ponent S-N, Palma de Mallorca 07015, Spain
关键词
Asteroidea; Starfish; Mediterranean and echinoderm; FRIO UPWELLING ECOSYSTEM; BRAZIL; CYCLE; ABUNDANCE;
D O I
10.1186/s10152-016-0453-z
中图分类号
Q17 [水生生物学];
学科分类号
071004 ;
摘要
The growth and reproductive biology of the sea star Astropecten aranciacus was investigated on the continental shelf of the northwestern Mediterranean Sea. Sea stars were captured monthly in two bathymetric ranges (5-30 and 50-150 m) between November 2009 and October 2012. Bathymetric segregation by size in A. aranciacus was detected: small individuals inhabit shallow areas (5-30 m), while large individuals inhabit deeper areas of the continental shelf (50-150 m). Recruitment was recorded twice nearshore but no recruitment was detected offshore during the whole study period. Three cohorts were identified in each bathymetric range and growth rates were estimated. A. aranciacus population exhibited a seasonal growth pattern, being higher from June to October in the nearshore cohorts and from February to October in the offshore ones. Histology and organ indices revealed that spawning likely started in March, coinciding with the spring phytoplankton bloom and the increase in sea water temperature, and extended until June-July. Ratio between males and females was approximately 1:1 throughout the year and in both bathymetrical ranges. The size at first maturity (R50 %) was estimated to be R = 112 mm. A. aranciacus did not show an inverse relationship between gonad index and pyloric caeca index.
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页数:13
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