First record of a-sexual reproduction by fission in Holothuria (lessonothuria) verrucosa (Selenka, 1867) from coastal waters of Karachi, Pakistan
Journal Title: International Journal of Environment and Geoinformatics - Year 2018, Vol 5, Issue 1
Abstract
An experiment of a-sexual reproduction by fission was conducted on sea cucumber, Holothuria (Lessonothuria) verrucosa (Selenka, 1867) for 98 days. Anterior fission was observed on Day 1 with the formation of fission on the body of the sea cucumber. Initial length of 14 cm and weight of 21 g was measured at Day 1 in an aquarium under laboratory condition. Complete fission was observed on Day 7 of experiment by formation of 2 specimens; A and P. Initial length and weight for A was 4.5 cm and 3.18 g, while P was 9.5 cm and 17.30 g respectively. Increased weight for specimen A was observed on Day 20 with the first observation of the formation of anal pore. Tentacles started to form on specimen P on Day 34. Complete formation of anus on specimen A was seen on the 98th day of experiment with final weight of 3.84 g and length of 4.6 cm. Large growth of tentacle was also seen on Day 98 of the experiment with a final weight of the specimen P as 17.56 g and length as 9.7 cm.
Authors and Affiliations
Quratulan AHMED, Qadeer Mohammad Ali, Nurzafirah Mazlan, Levent Bat
Keywords
Related Articles
- EP ID EP280324
- DOI 10.30897/ijegeo.353267
- Views 71
- Downloads 0
First record of a-sexual reproduction by fission in Holothuria (lessonothuria) verrucosa (Selenka, 1867) from coastal waters of Karachi, Pakistan
An experiment of a-sexual reproduction by fission was conducted on sea cucumber, Holothuria (Lessonothuria) verrucosa (Selenka, 1867) for 98 days. Anterior fission was observed on Day 1 with the formation of fission on t...
Using Digital Elevation Model and Remotely Sensed Data in Determining the Geomorphological and Morphometric Features: Gaziköy-Saros Region, Northwestern Turkey
The Gaziköy–Saros region is located in the western part of the North Anatolian Fault Zone (NAFZ), Turkey, which is one of the major active strike-slip faults recognized in the world. The morphological characteristics of...
Numerical Modelling of the 1995 Dinar Earthquake Effects on Hydrodynamic Regime of Egirdir Lake
The effect of earthquakes on closed and semi-closed water systems is a research topic that has been studied for many years. The lack of continuous measurement systems in closed and semi-closed water systems is insufficie...
Investigation of the Usability of Mobile Sensors for Weather Forecasting
Crowd sourcing is a popular method for providing data from people by the use of mobile sensor, internet and communication technologies. However efficient use of the raw data provided by the sensors with different charact...
Locational Analysis of Surface Water Quality, Sediment and Dredge Spoil At Nembe, Bayelsa State-NIGERIA
The objective of this research was spatial characterization of the biological and physico chemistry of the surface water, sediment and dredge spoil samples from the Dredging activity at Obama creek in Bayelsa State. A to...