Nutritional condition and gonad development of juvenile and subadult California spiny lobster Panulirus interruptus in two habitats

Abstract

Resumen.-Se analizó la condición nutricional y el desarrollo gonádico de juveniles y sub-adultos de langosta roja (Panulirus interruptus) en 2 sitios de la Península de Baja California cercanos geográficamente, pero con condiciones ambientales contrastantes, el más norteño con condiciones subtropicales y el sureño con condiciones semitempladas. Se estimaron el índice hepatosomático y el índice refractivo de la sangre, y se cuantificaron las proteínas, lípi dos y carbohidratos del hepatopáncreas en 62 langostas. Adicionalmente, se comparó el desarrollo gonádico de los organismos en ambos sitios. El índice hepatosomático y la cuantificación de lípidos mostraron que la condición nutricional de los organismos fue diferente en cada sitio. Se observó que los índices de condición nutricional son afectados por el de sarrollo gonádico debido al uso de reservas para la maduración de las gónadas. La condición nutricional y el desarroll o gonádico están fuertemente relacionados con las condiciones ambientales donde se encuentran las langostas, lo cual es información útil para el manejo de la pesquería de P. interruptus. Palabras clave: Langosta, Panulirus interruptus, reproducción, condición nutricional, Península de Baja CaliforniaAbstract.-The nutritional condition of juveniles and subadults of the California spiny lobster (Panulirus interruptus) from 2 sites along the west coast of the Baja California Peninsula, near each other but with contrasting environmental conditions were compared. The northern site presents subtropical environmental conditions and the southern has semi-temperate. The hepatosomatic and blood refractive indices and proteins, lipids, and carbohydrates from the hepa topancreas in 62 lobsters were assayed. Gonad development of the lobsters between the 2 sites was compared. The hepatosomatic index and lipids of the lobsters at each site were different. The nutritional condition indices are affected by gonad development tied to the reserves needed for maturation of the gonads. Nutritional condition and gonad development are strongly related to environmental conditions. This is key to efforts in spiny lobster fishery management.

Coral Reef Degradation Differentially Alters Feeding Ecology of Co-occurring Congeneric Spiny Lobsters

“…BRI is a proxy for physiological condition because hemolymph density is positively correlated with protein concentration in the serum of crustaceans (Lorenzon et al, 2011). However, as the molt cycle affects BRI (Rodríguez-García et al, 2015), we cut the distal third of one pleopod from each lobster to determine the molt stage by microscopy (Lyle and MacDonald, 1983). Only lobsters in intermolt (stage C of Drach's scale) were used to estimate BRI.…”

Ontogenetic changes in digestive enzyme activity and biochemical indices of larval and postlarval European lobster (Homarus gammarus, L)

“…Additionally, a close relationship between the physiological condition of the broodstock and their reproductive success has been demonstrated for marine organisms including lobsters (Agnalt 2008;Moland et al 2010). More specifically, it was demonstrated that the inclusion of specific phospholipids in formulated feeds improved the nutritional status of the broodstock, gonad development, and egg and larvae quality (Navas et al 1997;Rodríguez-García et al 2015). Yet, to the best of our knowledge, there are no published studies on the ontogenetic changes in lipid class composition during larval development for H. gammarus.…”