finmarchicus, there is little to no opsin expression in embryos, and the highest expressions were observed in naupliar
and early copepodite developmental stages.
The lengths of entire naupliar
exuviae were measured from the anterior mid-dorsal margin to the base of the caudal spines, and lengths from the anterior to mid-dorsal posterior margins of the prosome were measured for all copepodite exuviae.
During the naupliar
(N1-N5) stages, larvae were not fed because differentiation of the digestive tract is incomplete and the yolk sac is the source of nutrition.
1989) reared Metapenaeopsis palmensis (Haswell) in the laboratory and described all the larval stages of the species except the naupliar
density and adult density were significantly greater in the 0% treatment than the 50% and 75% treatments.
In this way, eggs can hatch and naupliar
stages can survive in small-scale hatcheries located on the coast.
The relationship between egg size and naupliar
size in the calanoid copepod Diaptomus claviceps Schacht.
The outcome is a planktonic larva that metamorphoses through five naupliar
, three protozoean, and three mysis stages, before reaching the semibenthic postlarval stage.
1994) and quality (Moyse 1963) of food available to the feeding naupliar
stages that precede the nonfeeding cyprid stage.
4 Growth--egg to naupliar
stage NVI Development rate 4-12 3.
Table 1 Description of embryo stages of Callinectes sapidus Elapsed Time Stage Description (hours at 27[degrees]C) 1 Fertilization 0 2 Early cleavage; morula 12 (random mass of yolk cells) 3 Late cleavage; blastula 36 (mass of undifferentiated yolk cells) 4 Embryonic naupliar
stage; 85 transparent embryo above the yolk 5 Early appendage fomation; 110 embryo invading ventral portion of yolk 6 Embryonic eye; eye appears 160 as scarlet crescent; elongating appendages 7 Presence of beating heart; 180 pigmented appendages 8 Oval, pigmented eye; 50% 210 of yolk utilized; clear appendages 9 Compound eye with dark 230 pigmentation; only small amounts of yolk 10 Protozoeae stage ready 280 for hatching into free-swimming zoea
We conclude that the naupliar
epidermis does not present a significant barrier to compounds of molecular weight below about 800 and th at substances such as [H.