02543nas a2200277   4500008004100000245013600041210006900177260000800246300001200254490000800266520162200274653002801896653002101924653001401945653001401959653001601973653001201989653001702001653002602018653001602044653001802060100002502078700001402103700001802117856013002135       1999                        eng d00aFacultative lecithotrophy during larval development of the burrowing shrimp <i>Callianassa tyrrhena </i>(Decapoda : Callianassidae)0 aFacultative lecithotrophy during larval development of the burro  cMAY  a635-6420 v1333 aSurvival, developmental and consumption rate (Artemia nauplii ingested per day) as well as predation efficiency (ingested per available Artemia nauplii) were studied during the larval development of the shallow-water burrowing thalassinid Callianassa tyrrhena (Petagna, 1792), which exhibits an abbreviated type of development with only two zoeal stages and a megalopa. The larvae, hatched from berried females from S. Euboikos Bay (Aegean Sea, Greece), were reared at 10 temperature-food density combinations (19 and 24 degrees C; 0, 2, 4, 8 and 16 Artemia nauplii d(-1)). Enhanced starvation resistance was evident: 92 and 58% of starved zoeas I molted to zoea II, while metamorphosis to megalopa was achieved by 76 and 42% of the hatched zoeas at 19 and 24 degrees C, respectively. The duration of both zoeal stages was affected by temperature, food density and their interaction. Nevertheless, starvation showed different effects at the two temperatures: compared to the fed shrimp, the starved zoeae exhibited accelerated development at 19 degrees C (8.4 d) but delayed metamorphosis at 24 degrees C (5.9 d). On the other hand, both zoeal stages were able to consume food at an increased rate as food density and temperature increased. Predation efficiency also increased with temperature, but never exceeded 0.6. Facultative lecithotrophy, more pronounced during the first zoeal stage of C. tyrrhena, can be regarded as an adaptation of a species whose larvae can respond physiologically to the different temperature-food density combinations encountered in the wide geographical range of their natural habitat.10aabbreviated development10abrachyuran crabs10aCrustacea10agrapsidae10apalinuridae10aperiods10arequirements10astarvation resistance10atemperature10athalassinidea1 aThessalou-Legaki, M.1 aPeppa, A.1 aZacharaki, M.  uhttps://icgf.myspecies.info/content/facultative-lecithotrophy-during-larval-development-burrowing-shrimp-callianassa-tyrrhena