Resumen de Profile Analysis on the Ornamental Marine Yellow-Arrow Spider Crab Stenorhynchus debilis (Smith 1871) into Experimental Studies for Live Management and Cultivation in Laboratory
Mario Monteforte Sánchez, Pablo Monsalvo Spencer, Gabriel Robles Villegas, Teodoro Reynoso-Granados
Ornamental marine species from the tropical west American coast are poorly known although many of them are being commercialized since a while ago. For example, yellow-arrow spider crabs, Stenorhynchus debilis (Brachyura: Inachidea), are frequently found for sale in web-based stores and as tenants into domestic aquaria. Therefore, the interest in studying the species’ requirements for management in land-based conditions is pertinent. This paper examines S. debilis as experimental actor. Specimens were collected along May to August 2015 into cultivation artifacts designed for pearl oysters farming at La Paz bay, Gulf of California. Five experiments were prepared towards two main objectives viewing at the practical framework of ornamental marine species: (1) Find the species’ profile into selected tests. Data included: anesthetic therapies, acute responses to temperature and salinity, special effects (food and feeding, density, sex-ratio, size, shelters, and handling in general), and notes concerning ovigerous females, eggs and larvae, and (2) Evaluate outputs seeking explanations for growth, survival and performances as a function of tropical-temperate and small-crab criteria. Our results agreed with expected bio-benchmarks overall, so did as to consistency of highlights regarding compatibility in domestic aquaria, and species-dependent aspects. Nevertheless, growth happened in a diet experiment even if only one crab out of the 24 under test displayed an incomplete –deadly—molt. A triangular-like Size Index was assessed, finding that two of the three food types tested had promoted better performance. Finally, this paper may contribute with some updates for the still incomplete mosaic of knowledge about ornamental marine crabs.
