Record Details

Carotenoid profiles in relation to maturation, Moulting, food and habitat in the Indian spiny Lobster Panulirus homarus (Linnaeus, 1758) (TH 113)

CMFRI Repository

View Archive Info
 
 
Field Value
 
Relation http://eprints.cmfri.org.in/7164/
 
Title Carotenoid profiles in relation to maturation,
Moulting, food and habitat in the Indian spiny
Lobster Panulirus homarus (Linnaeus, 1758) (TH 113)
 
Creator Antony, Mary Asha
 
Subject Theses
Lobsters
 
Description Carotenoids are responsible for natural pigmentation in crustaceans. The
changes in the amount and redistribution of carotenoid pigments in crustaceans
depend on several factors including sexual cycle, moulting, food and habitat.
Carotenoid changes in Panulirus homarus were studied during thc premoult,
postmoult and intermoult stages. Highest carotenoid concentration was
recorded in the premoult stage (774I.1g/g in hepatopancreas, 725I.1g/g in the
exoskeleton and 133 I.Ig/g in the muscle). During postmoult stage the
carotenoid concentration was lowest. Moulting accounted for 66% loss in
carotenoid pigments. Astaxanthin levels were high in premoult stage in the
exoskeleton and the hepatopancreas. During postmoult stage there was a
sharp decrease in astaxanthin concentration in these tissues.
Significant differences in carotenoid concentration were recorded in
different tissues during ovarian maturation. The carotenoid levels were low in
the immature ovary (128I.1g/g) and in the fully mature ovary the concentration
increased to 512I.1g/g. The increase in carotenoid concentration of the ovary
coincided with a decrease in carotenoid concentration of hepatopancreas and
increase in carotenoid concentration in the exoskeleton. Spent stage was
characterized by decrease in carotenoid content in the ovary, hepatopancreas
and exoskeleton. Astaxanthin was found to accumulate in the hepatopancreas
during early maturation and during vitellogenesis they were mobilized to the
ovaries. Different naturally occurring carotenoids were studied for their effect on
pigmentation of P. homarus. Among the four feeds (Donax cuneatus, Perna
viridis, Metapenaeus dobsoni, Paphia malabarica) used P. homarus fed on
M. dobsoni and green mussel P. viridis had the best pigmentation pattern. The
least pigmented lobsters were those fed on D. cuneatus. D. cuneatus was
enriched with Spirulina and Haematococcus pluvialis and these were offered as
food to P. homarus. The results revealed that pigmentation of P. homarus can
be increased by enriched feed. Enrichment studies revealed that Spirulina
enriched clams were superior to clams enriched with H. pluvialis when used as
feed for P. homarus. The study on the influence of habitat on pigmentation
pattern revealed that in captive conditions the colour of rearing tanks had a
direct influence on pigmentation pattern. Among the four different colored tanks
used in the study (blue, black, translucent and white) lobsters reared in black
coloured tanks had the best pigmentation pattern.
 
Date 2003
 
Type Thesis
NonPeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/7164/1/TH-113.pdf
Antony, Mary Asha (2003) Carotenoid profiles in relation to maturation, Moulting, food and habitat in the Indian spiny Lobster Panulirus homarus (Linnaeus, 1758) (TH 113). ["eprint_fieldopt_thesis_type_phd" not defined] thesis, PGPM, Central Marine Fisheries Research Institute.