Sexual differentiation in juvenile American lobster (Homarus americanus)
| Autor: | Kadra Benhalima, Michel Comeau |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
0303 health sciences Homarus Larva Sexual differentiation biology Zoology Pelagic zone American lobster biology.organism_classification 010603 evolutionary biology 01 natural sciences 03 medical and health sciences Juvenile Animal Science and Zoology Ecology Evolution Behavior and Systematics 030304 developmental biology |
| Zdroj: | Canadian Journal of Zoology. 97:650-653 |
| ISSN: | 1480-3283 0008-4301 |
| DOI: | 10.1139/cjz-2018-0297 |
| Popis: | American lobsters (Homarus americanus H. Milne Edwards, 1837) settling to the bottom after their pelagic larval stage are sexually undifferentiated. Based on stereomicroscope observations, the female’s gonopore first appeared for lobsters about 13 mm carapace length (CL) and the dimorphism of the first pair of male pleopods was first observed at about 15 mm CL. Based on histological observations, the internal reproductive system for both males and females began differentiating at sizes ≥20 mm CL. The vasa deferentia were observed for males >30 mm CL indicating that the male reproductive system is fully formed. For females, the ovaries were observed at sizes ≥20 mm CL, but the oviducts were not detected in animals |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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