IDENTIFY OF EMBRYONIC DEVELOPMENTAL STAGES BY EYE INDEX (EI) USAGE IN DECAPODS: PALAEMON ELEGANS, HOMARUS GAMMARUS, ASTACUS LEPTODACTYLUS

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TAGHIZADEH Z.; KHODABANDEH S.

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Journal: IRANIAN JOURNAL OF BIOLOGY Year:2010 | Volume:22 | Issue:4 Page(s): 581-593

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Title

IDENTIFY OF EMBRYONIC DEVELOPMENTAL STAGES BY EYE INDEX (EI) USAGE IN DECAPODS: PALAEMON ELEGANS, HOMARUS GAMMARUS, ASTACUS LEPTODACTYLUS

Author(s)

TAGHIZADEH Z. | KHODABANDEH S. | Issue Writer Certificate

Keywords

ASTACUS LEPTODACTYLUSQ3

EYE INDEXQ3

HOMARUS GAMMARUSQ3

NAUPLIUSQ3

PALAEMON ELEGANSQ2

Abstract

The most important order of crustacean is decapoda. They have several larval stages which the youngest of them named NAUPLIUS. The naupliar development in some of the species of decapods occurs in the embryon and free larvae hatches. Because of the embryonized NAUPLIUS, identification of the embryonic developmental stages has been difficult yet and new methods are required to compartment. In this study, we examined using of the EYE INDEX to identify the embryonic developmental stages of the three species of decapoda i.e. PALAEMON ELEGANS, HOMARUS GAMMARUS and ASTACUS LEPTODACTYLUS which have different life histories and inhabit in brackish water, marine and fresh water, respectively. EYE INDEX determines by the method which was innovated by Perkins (1972). Hatching EYE INDEX is 156 mm for P. elegans, 430 mm for A. leptodactylus and 640 mm for H. gammarus. The results show that EYE INDEX can be used for the determination of the embryonic developmental stages as a simple method. When the EYE INDEX receives to the half part of the hatching EI, half part of the developmental process passed. When the EI reaches to the one third of the hatching EYE INDEX, one third of the embryonic development passed. Eclosion occurs in the maximum embryonic EYE INDEX. So we propose to use the EYE INDEX as a useful and easy method to distinguish the successive developmental stages of the embryonized NAUPLIUS.

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APA: Copy

TAGHIZADEH, Z., & KHODABANDEH, S.. (2010). IDENTIFY OF EMBRYONIC DEVELOPMENTAL STAGES BY EYE INDEX (EI) USAGE IN DECAPODS: PALAEMON ELEGANS, HOMARUS GAMMARUS, ASTACUS LEPTODACTYLUS. IRANIAN JOURNAL OF BIOLOGY, 22(4), 581-593. SID. https://sid.ir/paper/21608/en

Vancouver: Copy

TAGHIZADEH Z., KHODABANDEH S.. IDENTIFY OF EMBRYONIC DEVELOPMENTAL STAGES BY EYE INDEX (EI) USAGE IN DECAPODS: PALAEMON ELEGANS, HOMARUS GAMMARUS, ASTACUS LEPTODACTYLUS. IRANIAN JOURNAL OF BIOLOGY[Internet]. 2010;22(4):581-593. Available from: https://sid.ir/paper/21608/en

IEEE: Copy

Z. TAGHIZADEH, and S. KHODABANDEH, “IDENTIFY OF EMBRYONIC DEVELOPMENTAL STAGES BY EYE INDEX (EI) USAGE IN DECAPODS: PALAEMON ELEGANS, HOMARUS GAMMARUS, ASTACUS LEPTODACTYLUS,” IRANIAN JOURNAL OF BIOLOGY, vol. 22, no. 4, pp. 581–593, 2010, [Online]. Available: https://sid.ir/paper/21608/en

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