Zakea Sultana



Fields of Research 

In Bangladesh:
  • Nutritional requirement of cultured fishes.

In Japan:
  • Behavioral Ecology of intertidal mud crab.
  • Larval Development of intertidal Hermit crab, Pagurus.
  • Molecular Phylogeny and Transcriptome analysis of Hermit crab. 

Research contents

In Bangladesh:

  The optimum dietary protein requirement of a Thai strain of climbing perch (Anabas testudineus, Bloch, 1792) fry was investigated by feeding six semi-purified diets containing varying levels of dietary protein within a range of 25-50% over an 8 week feeding period. Statistical analysis of growth data showed that the weight gain and specific growth rate (SGR) of fish in all dietary groups increased proportionally with the increase in dietary protein concentration to level of 40% and thereafter decreased with further increase in dietary protein levels. On the basis of observed weight gain, SGR and FCR, a diet containing 40% protein with a protein to energy (PE) ratio of 92.63 (mg protein/Kcal gross energy) is recommended for maximum growth of (A. testudineus) under experimental condition used in this study.

In Japan:

   An inter-male competition for resource was compared between the reproductive and non-reproductive seasons in a mud crab under two natural and three experimental observations. In natural conditions, two factors: body size difference and residency, contributed equally to the fight outcomes in both seasons. In experiments during the reproductive season, (1) we created motivated intruders by capturing resident males and placing them in the burrows of other residents to induce a fight. (2) We repeated this but first placed a female in the burrow before introducing the intruder; findings for both experiments were similar to those for natural fights. (3) During non-reproductive season, we repeated the first experiment and found a different result: fight outcome was determined by the difference in body size, not residency. This is the first study to show that differing subjective value of a resource between the reproductive and non-reproductive seasons affects fight outcomes.

論文【査読あり】 (*Corresponding author)
Publications (Peer-Reviewed)

4. Sultana, Z*. & Asakura, A. (2015b). The complete larval development of Pagurus maculosus Komai & Imafuku, 1996 (Decapoda, Anomura, Paguridae) reared in the laboratory, and a comparison with sympatric species. Zootaxa, 3947(3): 301326.

3. Sultana, Z*. & Asakura, A. (2015a). The complete larval development of Pagurus lanuginosus De Haan, 1849 (Decapoda, Anomura, Paguridae) reared in the laboratory, with emphasis on the post-larval stage. Zootaxa, 3915(2): 206–232.

2. Sultana, Z., Takaoka J. & Koga T.* (2013). Resource value differentially affects fighting success between reproductive and non-reproductive seasons. Journal of Ethology, 31: 203-209. DOI 10.1007/s10164-013-0367-z

1. Hossain, M.A., Sultana, Z., Kibria, A.S.M.* & Azimuddin, K.M. (2012). Optimum Dietary Protein Requirement of a Thai Strain of Climbing Perch, Anabas testudineus (Bloch, 1792) Fry.  Turkish Journal of Fisheries and Aquatic Sciences, 12: 217-224.

Oral presentations (International)

3. Sultana, Z., Kinjo,  S., Nozawa, M. & Ikeo, K., Asakura, A. Beyond the Morphology: Phylogentic relationship of two closely related Hermit Crab (Anomura; Paguridae) based on complete mitochondrial genome sequence. The Crustacean Society & International Association of Astacology (TCS & IAA, 2015). Sydney, Australia, July, 2015.

2. Sultana, Z., Asakura, A. L
arval development of two Hermit crabs, Pagurus lanuginosus (de Haan) and P. maculosus(Komai & Imafuku) (Decapoda, Anomura, Paguridae): An evidence for Phylogenetic relationship. 8th International Crustacean Congress (ICC-8). Frankfurt am Maim, Germany. August, 2014.

1. Sultana, Z., Takaoka J. & Koga T. Resource value differentially affects fighting success between reproductive and non-reproductive seasons.
 33rd International Ethological Conference (ICE) and the Association for the Study of Animal Behavior (ASAB). The Sage Gateshead, Newcastle Gateshead, UK. August, 2013.  

Poster presentations

3. Sultana, Z., Babarinde, I. A., Asakura, A., Nozawa, M. & Ikeo K. Investigation of pigment-related genes in two closely-related intertidal hermit crabs, Pagurus lanuginosus and P. maculosus using transcriptome data. The 53rd Annual Meeting of Carcinological Society of Japan. October 10-12, 2015. Shinagawa, Japan.

2. Sultana, Z. & Asakura, A. Phylogenetic relationship of two closely related species of hermit crabs (Decapoda: Anomura): based on larval morphology and molecular data analyses. IAA & CSJ Joint International Conference on Crustacea. September 20-21, 2014. Sapporo, Japan. 

1. Sultana, Z. & Asakura, A. Larval development of two closely related Hermit crabs, Pagurus lanuginosus (de Haan) and P. maculosus (Komai & Imafuku), (Decapoda, Anomura, Paguridae). NIG retreat 2014. July3-4, 2014. Gotemba Kohgen TOKINO SUMIKA, Shizuoka.  

■ Training Courses

2. DBCLS Training:Tutorials on how to use databases and web tools in life science. January 27, 2015. National Institute of Genetics. Mishima, Shizuoka, Japan.

1. The 12th Korea - Japan - China Bioinformatics Training Course and Symposium. June 17-20, 2014, Ocean Suites Hotel, Jeju Island. South Korea.

(Membership of  Research Societies)

  • The Carcinological Society of Japan;
  •  日本ベントス学会; 
  • The Molecular Biology Society of Japan (MBSJ).