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Morphology of the genital segments of the parthenogenetic Artemia from Barkol Lake, to show the diff erence between the "early phase of post-larva IV" stage and post-larva III and post-larva IV stage a. post-larva III (ventral view); b. "early phase of post-larva IV" stage (ventrolateral view); c. post-larva IV (ventrolateral view). peo‫׃‬ posterior end of ovisac, ro‫׃‬ rudimentary ovisac, spi‫׃‬ spine of the ovisac. Arrows point to the boundary between the 3 rd and 4 th abdominal segments.

Morphology of the genital segments of the parthenogenetic Artemia from Barkol Lake, to show the diff erence between the "early phase of post-larva IV" stage and post-larva III and post-larva IV stage a. post-larva III (ventral view); b. "early phase of post-larva IV" stage (ventrolateral view); c. post-larva IV (ventrolateral view). peo‫׃‬ posterior end of ovisac, ro‫׃‬ rudimentary ovisac, spi‫׃‬ spine of the ovisac. Arrows point to the boundary between the 3 rd and 4 th abdominal segments.

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The brine shrimp Artemia exhibits two reproductive modes. 1). oviparity, producing diapause embryos; an. 2). ovoviviparity, producing free-swimming nauplii. Previous studies have suggested the existence of a critical stage that determines the reproductive mode. Physicochemical factors, such as photoperiod, temperature, and salinity, have been sugge...

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Context 1
... on the results of the main experiment, females at post-larva III and post-larva IV stages, and a stage between them were shifted in the supplementary experiment. The morphological defi nition of the "between post-larva III and IV" stage and its comparison with the two other stages are shown in Fig.1. At post-larva III stage, the ovisac was a rudimentary hump that reached the beginning of the third abdominal segment (Fig.1a). ...
Context 2
... morphological defi nition of the "between post-larva III and IV" stage and its comparison with the two other stages are shown in Fig.1. At post-larva III stage, the ovisac was a rudimentary hump that reached the beginning of the third abdominal segment (Fig.1a). At the stage postlarva IV, the ovisac concealed two-thirds of the third abdominal segment and a pair of sharp ventral spines were visible (Fig.1c). ...
Context 3
... post-larva III stage, the ovisac was a rudimentary hump that reached the beginning of the third abdominal segment (Fig.1a). At the stage postlarva IV, the ovisac concealed two-thirds of the third abdominal segment and a pair of sharp ventral spines were visible (Fig.1c). At the "between post-larva III and IV" stage, a developing ovisac was observed and reached the middle of the third abdominal segment, and its blunt ventral spines were visible (Fig.1b). ...
Context 4
... the stage postlarva IV, the ovisac concealed two-thirds of the third abdominal segment and a pair of sharp ventral spines were visible (Fig.1c). At the "between post-larva III and IV" stage, a developing ovisac was observed and reached the middle of the third abdominal segment, and its blunt ventral spines were visible (Fig.1b). These characters are closer to post-larva IV than postlarva III, and thus the stage is called an "early phase of post-larva IV". ...
Context 5
... dots, which was a character of the post-larva V (Criel, 1989) were not observed microscopically on the ovaries. (Fig.1). ...
Context 6
... on the results of the main experiment, females at post-larva III and post-larva IV stages, and a stage between them were shifted in the supplementary experiment. The morphological defi nition of the "between post-larva III and IV" stage and its comparison with the two other stages are shown in Fig.1. At post-larva III stage, the ovisac was a rudimentary hump that reached the beginning of the third abdominal segment (Fig.1a). ...
Context 7
... morphological defi nition of the "between post-larva III and IV" stage and its comparison with the two other stages are shown in Fig.1. At post-larva III stage, the ovisac was a rudimentary hump that reached the beginning of the third abdominal segment (Fig.1a). At the stage postlarva IV, the ovisac concealed two-thirds of the third abdominal segment and a pair of sharp ventral spines were visible (Fig.1c). ...
Context 8
... post-larva III stage, the ovisac was a rudimentary hump that reached the beginning of the third abdominal segment (Fig.1a). At the stage postlarva IV, the ovisac concealed two-thirds of the third abdominal segment and a pair of sharp ventral spines were visible (Fig.1c). At the "between post-larva III and IV" stage, a developing ovisac was observed and reached the middle of the third abdominal segment, and its blunt ventral spines were visible (Fig.1b). ...
Context 9
... the stage postlarva IV, the ovisac concealed two-thirds of the third abdominal segment and a pair of sharp ventral spines were visible (Fig.1c). At the "between post-larva III and IV" stage, a developing ovisac was observed and reached the middle of the third abdominal segment, and its blunt ventral spines were visible (Fig.1b). These characters are closer to post-larva IV than postlarva III, and thus the stage is called an "early phase of post-larva IV". ...
Context 10
... dots, which was a character of the post-larva V (Criel, 1989) were not observed microscopically on the ovaries. (Fig.1). ...

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