Influence of salinity and cadmium on capsule strength in Pacific herring eggs

Alderdice, D. F.; Rosenthal, H.; Velsen, F. P. J.

doi:10.1007/bf02189894

Cited by 23 publications

(5 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Daily observations were made of changes in yolk volume, larval length, and behaviour for all species (except Engraulis japonica length). Yolk volume was calculated from the expression 4/3n(Q/2)2x r2/2 (Alderdice et al 1979 (Fukuhara 1988) and was defined as the total time larvae spent moving during a I min observation period. Ten larvae were selected at random for behavioural observations in tanks.…”

Section: Observations and Measurementsmentioning

confidence: 99%

Effects of temperature on yolk utilization, initial growth, and behaviour of unfed marine fish-larvae

Fukuhara

1990

Mar. Biol.

View full text Add to dashboard Cite

Abstract. The effect of temperature on yolk utilization, initial growth and behaviour of larvae of four species of marine fishes, i.e., Acanthopagrus schlegeli, Engraulis japonica, Pagrus major and Paralichthys olivaceus, was investigated under laboratory conditions at Hiroshima in 1989. The yolk sac was absorbed earlier with increasing temperature for all species. Morphological characters such as pectoral fin appearance, mouth opening and eye pigmentation differed from species to species over the range of experimental temperatures, and the sequence of development of these characters varied with temperature even within the same species. Temperature did not have a large influence on the maximum growth of unfed larvae, but had a clear effect on the time to starvation, occurring earlier at higher temperatures. Larval behaviour as indicated by time spent moving was also influenced by temperature; behavioural activity was greater at higher temperatures for all species examined. The effect of temperature on the early stage of larval life is discussed in terms of behavioural and morphological developments, as well as on yolk utilization, and its influence on larval survival in nature and under rearing conditions is evaluated.

show abstract

Section: Observations and Measurementsmentioning

confidence: 99%

Effects of temperature on yolk utilization, initial growth, and behaviour of unfed marine fish-larvae

Fukuhara

1990

Mar. Biol.

View full text Add to dashboard Cite

show abstract

“…Copper exposure induced premature hatching at both pH 7.6 and pH 6.3, despite the decreased heart rate and tail movements of embryos exposed to 0.8 mol/L at pH 6.3. Heavy metals such as Cd and Zn are also known to induce premature hatching and this has been ascribed to softening of the chorion [28,29]. To our knowledge nothing is known about the effect of Cu on chorionic strength.…”

Section: Discussionmentioning

confidence: 99%

EFFECTS OF WATER pH ON COPPER TOXICITY TO EARLY LIFE STAGES OF THE COMMON CARP (CYPRINUS CARPIO)

Stouthart¹,

Haans²,

Lock³

et al. 1996

Environ Toxicol Chem

View full text Add to dashboard Cite

X a n d e r J .H .X . S t o u t h a r t ,* J e r o e n L .M . H a a n s , R o b e r t A .C . L o c k a n d A bstract-Carp eggs were exposed immediately after fertilization to Cu concentrations of 0.3 and 0,8 (xmol/L at water pH 7.6 or pH 6.3. Mortality, the incidence of spina! cord deformation, heart rate, tail movements, hatching success, and whole-body content of K, Na, Mg, Ca, and Cu were determined over time. Light microscopical preparations of eggs (48 h after fertilization) and larvae (168 h after fertilization) were studied. At pH 7.6, Cu did not affect egg mortality, heart rate, tail movements, and whole-body K and Mg content. Hatching success increased only in the 0.3 fimol/L Cu group. Exposure to 0.8 (junol/L Cu increased larval mortality and larval deformation and decreased whole-body Na and Ca content. At pH 6.3, exposure to 0.8 |j.mol/L Cu increased egg mortality and decreased heart rate and tail movements. Furthermore, premature hatching, a concentration-dependent increase of larval mortality, and larval deformation was observed. Exposure to 0.3 and 0.8 p.mol/L Cu decreased the whole-body content of K, Na, Mg, and Ca. Uptake of Cu after hatching increased two-fold at pH 6.3 compared to the pH 7.6 groups. At pH 6.3, all Cu-exposed larvae were unable to fill their swim bladder. Also, after 168 h the yolk sac remained largely unabsorbed in the 0.3 and 0.8 ixmol/L Cu group. Exposure to 0,8 (xmol/L Cu resulted in coagulation of proteins in eggs and yolk sacs. No significant changes in any of the assessed parameters were observed in control groups of pH 6.3 and pH 7.6.

show abstract

“…There were three responses to measure in our investigation: the vitellus utilization, duration of vitelline absorption and specific growth rate ( SGR ; %/day) of larvae. The yolk volume ( V ; mm 3 ) was gauged using the following formula (Alderdice, Rosenthal & Velson, ; Hart & Purser, ; Wang et al., ):

V false({normalmm}^{3} false) = \frac{π R r^{2}}{6},

where R is the major diameter of the yolk sac (mm), and r is the minor diameter of the yolk sac (mm).…”

Section: Methodsmentioning

confidence: 99%

Vitellus utilization under concurrent variations in temperature and light intensity in Ussuri catfish, Pseudobagrus ussuriensis

et al. 2018

View full text Add to dashboard Cite

The combined effects of temperature (18-34°C) and light intensity (100-1,800 lx) on the vitellus utilization, duration of vitelline absorption and larval growth in Pseudobagrus ussuriensis were studied under laboratory conditions using a central composite design and response surface methodology. The results showed that the firstand second-order effects of temperature and light intensity were significant (p < 0.05), the interactive effect between temperature and light intensity was nonsignificant (p > 0.05) and the effects of light intensity were greater than that of temperature. Predicated on the reliable models of vitelline utilization regarding temperature and light intensity, the optimal rearing environment shaped by a temperature/light intensity of 25-26°C/1,030 lx (12.98 μmol m −2 s −1 ) was obtained via model optimization. Verification results attained under laboratory conditions showed that vitelline utilization was most efficient at these optima. The application of the environmental optima would contribute to refining the seed quality in the larviculture of this species.

show abstract

Influence of salinity and cadmium on capsule strength in Pacific herring eggs

Cited by 23 publications

References 20 publications

Effects of temperature on yolk utilization, initial growth, and behaviour of unfed marine fish-larvae

Effects of temperature on yolk utilization, initial growth, and behaviour of unfed marine fish-larvae

EFFECTS OF WATER pH ON COPPER TOXICITY TO EARLY LIFE STAGES OF THE COMMON CARP (CYPRINUS CARPIO)

Vitellus utilization under concurrent variations in temperature and light intensity in Ussuri catfish, Pseudobagrus ussuriensis

Contact Info

Product

Resources

About