Crustacean sexual differentiation: a decapod perspective

Area of Science:

• * Zoology and Developmental Biology
• * Marine Biology and Ecology

Background:

• * Sexual differentiation in crustaceans is a complex process influenced by genetic, hormonal, and environmental cues.
• * Significant interspecies diversity exists in the mechanisms governing sex determination and differentiation among decapod crustaceans.

Purpose of the Study:

• * To review the key genetic and hormonal mechanisms underlying sexual differentiation in decapod crustaceans.
• * To explore the role of environmental factors in modulating crustacean sexual development.
• * To discuss the implications of these findings for aquaculture and conservation biotechnology.

Main Methods:

• * Literature review of existing research on crustacean sexual differentiation.
• * Analysis of genetic pathways (e.g., Doublesex gene) and hormonal systems (e.g., androgenic gland hormone, gonad-inhibiting hormone).
• * Examination of environmental influences on sex determination, such as population density.

Main Results:

• * Decapod sexual differentiation is regulated by genes like Doublesex and species-specific factors such as the Y-linked iDMY gene in spiny lobsters.
• * Male differentiation is primarily controlled by the androgenic gland and its insulin-like hormone.
• * Female differentiation is influenced by eyestalk neuropeptides, including gonad-inhibiting hormone, and environmental factors like density can affect flexible genetic systems.

Conclusions:

• * A comprehensive understanding of crustacean sexual differentiation mechanisms is crucial for advancing aquaculture and conservation.
• * Biotechnological tools, including emerging technologies like CRISPR, offer promising avenues for future research and applications.
• * Manipulating sex ratios through biotechnological interventions can benefit crustacean aquaculture and conservation strategies.