Effect of body size, temperature, and salinity on the routine metabolism of larval and juvenile spotted seatrout

Abstract

Routine oxygen consumption rates of young spotted seatrout Cynoscion nebulosus (Sciaenidae) were measured over a range of temperatures (24, 28, 30 and 32 C) and salinities (5, 10, 20, 35 and 45). Larvae and juveniles, 4Á1-39Á5 mm standard length (L S ), ranging several orders of magnitude in dry body mass were used to estimate the mass-metabolism relationship. Oxygen consumption (ml O 2 larva À1 h À1 ) scaled isometrically with body mass for larvae <5Á8 mm L S (phase I, slope ¼ 1Á04) and allometrically thereafter (phase II, slope ¼ 0Á78). The inflection in the mass-metabolism relationship coincided with the formation of the hypural plate and an increase in the relative tail size of larvae. Salinity did not have a significant effect on routine metabolism during phase I. Temperature and salinity significantly affected routine metabolism during phase II of the mass-metabolism relationship. The effect of salinity was temperature dependent, and was significant only at 30 C. Response surfaces describing the environmental influences on routine metabolism were developed to provide a bioenergetic basis for modelling environmental constraints on growth. # 2004 The Fisheries Society of the British Isles

Effects of Low Salinity on Adult Behavior and Larval Performance in the Intertidal Gastropod Crepipatella peruviana (Calyptraeidae)

“…Negative impacts of low salinities on OCRs have also been recorded for larvae of various invertebrate species [37], [42], [43], [44], [45], [77], [78], [79]. Because the gastropod velum has been described as a major respiratory organ for gastropod larvae [72], the decrease in oxygen consumption by C. peruviana larvae would be closely linked to the lack of activity and decreased size of the velum in stressed veligers, considering that a smaller velum implies a smaller surface area available for gas exchange [72].…”

Consumption and gut evacuation rate of laboratory‐reared spotted seatrout (Sciaenidae) larvae and juveniles

“…Preliminary trials indicated that cold formalin euthanized larvae quickly and minimized any regurgitation or continued digestion of food. The notochord or standard length ( L S ) of each fish was measured under a dissecting microscope, and dry mass ( M D ) calculated from the length‐mass relationship of Wuenschel et al . (2004).…”

Effects of body mass on physiological and anatomical parameters of mature salmon: evidence against a universal heart rate scaling exponent

“…Indeed, intra-specific scaling exponents for f H and M O2 have been shown to vary throughout development (e.g. Barrionuevo and Burggren, 1999;Wuenschel et al, 2004;Moran and Wells, 2007), thus precluding extrapolation of scaling exponents to adult fish and highlighting the need to account for ontogeny and maturity when examining M b scaling.…”