Entity

Time filter

Source Type


Lahbib Y.,Laboratory of Environment Biomonitoring | Abidli S.,Laboratory of Environment Biomonitoring | El Menif N.T.,Laboratory of Environment Biomonitoring
Marine Biology Research | Year: 2011

Spawning and intracapsular development were studied in a Tunisian population of the rocky marine snail Stramonita haemastoma haemastoma. Spawning in aquaria occurred from late May until mid June. Females deposited between 20 and 86 egg capsules containing 1724-6956 eggs ranging between 60 and 75 μm in diameter. The number of egg capsules was not correlated with female size. However, larger females deposited bigger capsules and with more eggs. In the laboratory, with seawater temperature at 22°C and salinity of 35 psu, intracapsular development took 18 days and produced planktonic larvae without nurse eggs. Under laboratory conditions, hatchlings (4162 μm in shell length) only survived for 4 days. © 2011 Taylor & Francis. Source


Lahbib Y.,Laboratory of Environment Biomonitoring | Abidli S.,Laboratory of Environment Biomonitoring | Trigui El Menif N.,Laboratory of Environment Biomonitoring
Russian Journal of Marine Biology | Year: 2013

Imposex occurrence in the changeable nassa Nassarius (Sphaeronassa) mutabilis (Linnaeus, 1758) was confirmed in the present study. Advanced imposex stages were discovered for the first time in this nassarid starting from the initial appearance of the vas deference sequence or the bud penis (VDS1), to the point where this duct reaches the vaginal opening (VDS4). Three types of imposex pathways were found for stage 1 (VDS1a, VDS1b and VDS1d), two for stage 2 (VDS2a and VDS2d) and stage 3 (VDS3a and VDS3b). Affected females were found in the three studied stations with imposex frequency ranging from 10.5 to 47.2%, VDSI from 0.1 to 0.8, FPL from 0 to 0.1 mm, RPLI from 0 to 0.9, and VDL from 0.2 to 1.3 mm. Organotins body burden ranged from 0.8 to 16 ng/g d. w. for MBT, 2.5-14.9 for DBT, and 3.7-14.4 for TBT. To our knowledge, this is the first detailed report on imposex in N. mutabilis suggests its inclusion to list of imposex-affected gastropods. © 2013 Pleiades Publishing, Ltd. Source

Discover hidden collaborations