温度和喂食影响摩拉吧笛鲷体长体重关系和肥满度的研究

Abstract

Abstract:In this study we aimed to analyze the effects of water temperature and diet on the length-weight relationship and condition of juvenile Malabar blood snapper Lutjanus malabaricus over a 30-d experimental period. The experiment was conducted in the laboratory using a flow-through-sea-water system. The fish were subjected to four different temperatures (22, 26, 30, and 34 °C) and two diets (commercial pellet and natural shrimp). Fish were fed twice daily. L. malabaricus exhibited negative allometric growth (b<3) at the beginning of the experiment (Day 0) at all temperatures and both diets except for 22 °C fed with shrimp, which showed isometric growth (b=3). Conversely, at the end of the experiment (Day 30) fish showed isometric growth (b=3) at 30 °C fed with the pellet diet, indicating that the shape of the fish did not change with increasing weight and length, and a positive allometric growth (b>3) at 30 °C fed with shrimp diet, which indicated that fish weight increases faster than their length. The rest of the temperatures represented negative allometric growth (b<3) on both diet, meaning that fish became lighter with increasing size. The condition factors in the initial and final measurements were greater than 1, indicating the state of health of the fish, except for those fed on a pellet diet at 34 °C. However, the best condition was obtained at 30 °C on both diets. Nevertheless, diets did not have a significant effect on growth and condition of juvenile L. malabaricus. The data obtained from this study suggested culturing L. malabaricus at 30 °C and feeding on the pellet or shrimp diet, which will optimize the overall production and condition of this commercially important fish species.

Length–weight relationships of mesopelagic fishes from the equatorial and tropical Atlantic waters: influence of environment and body shape

“…The main reason for this somatic growth is probably the absence of extensive vertical migrations in most of these species (Badcock & Merrett, ; Olivar et al ., ). In general, the allometric pattern found in our species did not differ from those in other studies, although slight variations can be due to exogenous and endogenous factors ( e.g ., Jobling, ; Kimmerer et al ., ; Mazumder et al ., ), as well as the type of length measurement (standard or total) and size range analysed. For instance, Fock and Ehrich () gave a long list of LWRs for mesopelagic fishes from the North Atlantic.…”

Isometric growth in the world's largest bony fishes (genus Mola)? Morphological insights from fisheries bycatch data

“…More broadly, the potential for isometric scaling is of particular interest as such growth patterns are relatively rare in fish species under natural conditions (Bolger & Connolly, ; Mazumder et al, ; Ogle, ); given that fish body shape and density typically changes with growth and body condition (Lagler, ; Le Cren, ; Mazumder et al, ; Wootton, ). Although fish growth is frequently estimated as scaling isometrically to facilitate calculations when retrospectively deriving mass from length (Froese, ), greater precision is required when classifying the growth scaling of species ontogenetically.…”

Haematological and Biochemical Responses of Juvenile Malabar Blood Snapper (Lutjanus malabaricus Bloch & Schneider, 1801) Exposed to Different Rearing Temperatures and Diets

“…The fish were then placed into the bowl for anaesthetization until ventilatory movements ceased prior to the initial measurement of body weight (g) and total length (cm). The total length was measured to the nearest 0.1 cm with a measuring board and weighed to the nearest 0.01 g using an electronic balance (Model: KD-300KC) (Mazumder et al 2018a(Mazumder et al , 2018b(Mazumder et al , 2016.…”