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Anglický jazyk
Reproductive cycle of the brackish water crab Callinectes amnicola
Autor: d'Almeida Marie-Anne Kayi
The macroscopic study was supplemented by microscopic examination of the male and female reproductive organs. The sexual maturity scale includes both in males and females, 7 stages that encompass all the growth of these crabs. Microscopic analysis in males... Viac o knihe
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O knihe
The macroscopic study was supplemented by microscopic examination of the male and female reproductive organs. The sexual maturity scale includes both in males and females, 7 stages that encompass all the growth of these crabs. Microscopic analysis in males concerned the testes, vasa differentia, pleopods and penes differentiation. In the female, microscopic examination allowed to understand the oogenesis and to define the structure of the spermathecae. The embryogenesis occurs from a telolecithal egg whose development takes place according to the four usual phases. The segmentation is superficial and discoidal. Gastrulation and organogenesis lead to morphogenesis of the embryos. This embryogenesis is chaotic without formation of any blastocoele, arhanteron, or precise embryological layers.
- Vydavateľstvo: LAP LAMBERT Academic Publishing
- Rok vydania: 2019
- Formát: Paperback
- Rozmer: 220 x 150 mm
- Jazyk: Anglický jazyk
- ISBN: 9786139451920
