The objectives of our study were to determine if growth rates of Atlantic bumper (Chloroscombrus chrysurus, Carangidae) and vermilion snapper (Rhomboplites aurorubens, Lutjanidae) varied over small spatial scales in the northcentral Gulf of Mexico (GOM); determine the magnitude and variability of cruise estimates of larval mortality; and determine the potential influence of variability in these vital rates on cohort survivorship in a region where summer water temperatures approach 30[degrees]C and larval stage
durations are as short as two to three weeks.
40 days and ~60 days in the zoeal and megalopal stages, respectively) on the basis of the time lags in the occurrence of peak abundance between each larval stage
Four treatments were 1st, 2nd, 3rd and adult larval stage
Height measurements (dorso-ventral axis) of the larvae were obtained during the first phase of each larval stage
We need to know if extant molluscan larvae have resulted from shunting of juvenile traits onto an ancestral larval form that had a body plan unique to the larval stage
, or if molluscan larvae are better interpreted as differentiating juveniles that secondarily acquired traits facilitating a planktonic or even a planktotrophic lifestyle.
The tendency for negative effect at higher temperatures was observed in the larval stage
Thus, the variable duration of the larval stage
may be associated with the age of larvae.
The first Laird-Gompertz model for larval stage
based on age groupings had an initial specific growth rate of 0.
Followed by gastrulation, blastula will be changed into pluteus larval stage
where it exhibits the sea urchin characteristics.
BASF have also developed an all-round treatment aimed at fruit and veg growers that tackle the underground larval stage
of pests including carrot fly, sciarid fly, cabbage root fly, sawflies, onion flies and codling moths.
He said it will help to destroy and eliminate the mosquito breeding cycle thereby killing the mosquito at its larval stage
in the current high transmission season.
Even so, no larval stage
was indicator of a depth layer (surface, mid-water or bottom), suggesting that the low depth of the inlet (maximum of 15 m) is probably not sufficient to promote patterns of vertical aggregations of the larvae.