:: Volume 6, Issue 22 (10-2015) ::
JPG 2015, 6(22): 49-60 Back to browse issues page
Biological Structure and the Effect of Temperature on Embryonic Stage of the Spirobranchus kraussii (Baird, 1865) (Annelida: Serpulidae) in Bandar Abbas in the Persian Gulf
Fatemeh Lavajoo , Narges Amrollahi Biuki
Dep. of Marine Biology, Faculty of Marine Sciences, University of Hormozgan, Bandar Abbas, IR Iran.
Abstract:   (1878 Views)
A Serpulidaepolychaetae, Spirobranchuskraussii, was newly recorded in the Persian Gulf, Iran. It is the first record of Serpulidae species in Iran. Serpulidaeforms dense aggregations in rocky shores in Bandar Abbas. This research investigated the biological structure and the effect of temperature on embryonic stages of S. kraussii. Sampling was conducted with a quadrant of 10×10 cm2, in rocky shores from January to May. The largest specimen of S.
kraussiimeasured to a total body length of 36.4 mm, body width of 2.3 mm, total tube length of 48mm, and body wet weight of 0.11mg. Outer surface of tube is white and triangular in cross-section, inner surface colored blue or violet. Body color in ventral surface of thorax is dark violet, blue and pink. The sex ratio in S. kraussii was 1:2 and 1:0.81 in winter and spring respectively. Length-weight relationship was exponential and growth seems to be allometric for
S. kraussii. A linear relationship was found between total length and other parameters. Correlation coefficients between parameters were positive and significant (p<0.05). The specimen of S. kraussii in this study was larger than other specimens from different regions. The highest fertilization value and embryonic developmentwere observed at 28 ºC while at 34 ºC lowest fertilization occured and embryonic stage did not develop and cells denatured. The
smallest eggs are produced at 34 ºC, whereas the largest are produced at 28 ºC. Results of this study suggest that temperature is an effective environmental factor which influences S. kraussiilife cycle, offsprings and survival of larvae.
Keywords: Spirobranchuskraussii, Life cycle, Persian Gulf.
Full-Text [PDF 741 kb]   (300 Downloads)    
Type of Study: Basic and Original Research | Subject: Marine Biology
Received: 2018/01/14 | Accepted: 2018/01/14 | Published: 2018/01/14

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Volume 6, Issue 22 (10-2015) Back to browse issues page