Seasonal variations in biochemical constituents during the reproductive cycle of the female dog cockle Glycymeris glycymeris

1997 ◽  
Vol 129 (4) ◽  
pp. 625-634 ◽  
Author(s):  
C. Galap ◽  
F. Leboulenger ◽  
J.-P. Grillot
Keyword(s):  
Reproductive Cycle ◽  
Seasonal Variations ◽  
Biochemical Constituents

Seasonal variations in biochemical composition during the reproductive cycle of the intertidal gastropod Thais lamellosa Gmelin (Gastropoda, Prosobranchia)

1974 ◽  
Vol 52 (3) ◽  
pp. 305-318 ◽  
Author(s):  
Philip Lambert ◽  
Paul A. Dehnel
Keyword(s):  
Digestive Gland ◽  
Reproductive Cycle ◽  
Seasonal Variations ◽  
Biochemical Composition ◽  
Feeding Activity ◽  
Lipid Reserve ◽  
Low Level ◽  
Biochemical Constituents ◽  
Histological Sections ◽  
Intertidal Gastropod

Seasonal variations in biochemical constituents of Thais lamellosa Gmelin in relation to the reproductive cycle were studied. Digestive gland, foot muscle, and gonad were analyzed for protein, glycogen, lipid, and ash for 1 year. Data on feeding and gamete maturation were obtained from histological sections of digestive gland and gonad. Major periods of feeding activity occurred in April and August. The spawning peak was in March and gametogenesis began in July. Maximum glycogen levels coincided with major feeding periods but reserves in the digestive gland were mainly lipid. This lipid reserve was used during the winter. Glycogen was at a relatively low level in all tissues and appeared to be used by the developing gonad. The foot muscle stored neither lipid nor glycogen to any appreciable extern.During winter the digestive gland index decreased as reserves were used. The ovary index held constant from October to February then dropped sharply with spawning. Animals kept for the same period under artificial summer conditions showed no decrease in the digestive gland index, but a decrease in the ovary index. Few oogonia reached maturity and many were resorbed. Starved animals used more protein from the ovary than fed animals.

scholarly journals Dynamic of decapod crustacean larvae on the entrance of Guanabara bay

2002 ◽  
Vol 45 (4) ◽  
pp. 491-498 ◽  
Author(s):  
Lohengrin Dias de Almeida Fernandes ◽  
Sérgio Luiz Costa Bonecker ◽  
Jean Louis Valentin
Keyword(s):  
Reproductive Cycle ◽  
Seasonal Variations ◽  
Coastal Waters ◽  
Decapod Crustacean ◽  
Late Summer ◽  
Late Winter ◽  
Guanabara Bay ◽  
Tidal Cycles ◽  
Decapod Larvae

In the present study, we observed seasonal variations in the density of decapod larvae as well as changes in density related to diurnal and tidal cycles. Among the decapod larvae collected, portunids and grapsids were the most abundant, especially during nocturnal ebb tides and near the surface. The same results were obtained in late winter (September) and late summer (March). These results demonstrated a flow of decapod larvae from Guanabara Bay to adjacent coastal waters. Luciferid (Lucifer faxoni) was the only group with high densities during flood tides and we suggest this is an evidence of L. faxoni larvae entering Guanabara Bay in late winter. Probably these changes in distribution of Lucifer faxoni among winter and summer were related to reproductive cycle in the bay. For the portunids, grapsids and ocypodids, a similar dispersion strategy was observed towards adjacent coastal waters in the surface during nocturnal ebb tides.

Seasonal variations in the biochemical composition and reproductive cycle of the ghost crabOcypode quadrata(Fabricius, 1787) in Southern Brazil

2010 ◽  
Vol 9999A ◽  
pp. n/a-n/a ◽  
Author(s):  
Graziani de Freitas Antunes ◽  
Ana Paula Nunes do Amaral ◽  
Fabiana Pinto Ribarcki ◽  
Elenir de Fátima Wiilland ◽  
Denise Maria Zancan ◽  
...  
Keyword(s):  
Reproductive Cycle ◽  
Seasonal Variations ◽  
Biochemical Composition ◽  
Southern Brazil

scholarly journals Seasonal Variations in the Chemical Composition of Apple Snail, Pila globosa

2012 ◽  
Vol 47 (1) ◽  
pp. 89-92
Author(s):  
A Nargis ◽  
SH Ali ◽  
MR Hasan ◽  
MR Rahman
Keyword(s):  
Chemical Composition ◽  
Moisture Content ◽  
Reproductive Cycle ◽  
Seasonal Variations ◽  
Carbohydrate Content ◽  
Apple Snail ◽  
Pila Globosa

Protein, carbohydrate, fat, ash and moisture content in the muscle of Pila globosa (Swainson) were analyzed. The compositions varied seasonally  in relation to reproductive cycle of the snail. Significant correlation existed between moisture and carbohydrate (r = 0.79), moisture  and fat (r = 0.74), moisture and protein (r = 0.94), moisture and ash (r = 0.73), protein and ash (r = 0.80), fat and carbohydrate (r =  0.95), protein and carbohydrate (r = 0.89) in females. In male, correlation is highly significant between protein and ash ( r= 0.65), protein  and carbohydrate (r= 0.49), fat and carbohydrate ( r= 89). But negatively correlated with moisture and fat (r = -0.38), moisture and carbohydrate  (r = -0.40) ,), moisture and ash (r = - 0.30), moisture and protein (r = - 0.13). Fat and carbohydrate content was higher in large sized  female than that of the male.DOI: http://dx.doi.org/10.3329/bjsir.v47i1.10730 Bangladesh J. Sci. Ind. Res. 47(1), 89-92, 2012

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