scholarly journals Reproductive cycle and biochemical composition of Hexaplex trunculus (Gastropoda: Muricidae) from Bizerte lagoon, northern Tunisia

2010 ◽  
Vol 10 (2) ◽  
pp. 155-166 ◽  
Author(s):  
IH Gharsallah ◽  
P Vasconcelos ◽  
N Zamouri Langar ◽  
H Missaoui
Keyword(s):  
Reproductive Cycle ◽  
Biochemical Composition ◽  
Bizerte Lagoon ◽  
Northern Tunisia ◽  
Hexaplex Trunculus

Seasonal variation of biochemical composition of Noah's ark shells (Arca noae L. 1758) in a Tunisian coastal lagoon in relation to its reproductive cycle and environmental conditions

2018 ◽  
Vol 31 ◽  
pp. 14 ◽  
Author(s):  
Feriel Ghribi ◽  
Dhouha Boussoufa ◽  
Fatma Aouini ◽  
Safa Bejaoui ◽  
Imene Chetoui ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Reproductive Cycle ◽  
Coastal Lagoon ◽  
Biochemical Composition ◽  
Nutritional Quality ◽  
Dry Weight ◽  
Food Sources ◽  
Quality Indices ◽  
Bizerte Lagoon

The seasonal changes in biochemical composition of the edible bivalve Arca noae harvested from a Mediterranean coastal lagoon (Bizerte lagoon, Tunisia) were investigated from October 2013 to September 2014. Potential food sources and nutritional quality indices (NQI) were determined by analyzing the fatty acid profiles of their tissues during an annual reproductive cycle. Results showed that A. noae had moisture (73.8–82%) and protein (24.1–58.6% dry weight) as major components, followed by lipid (10.4–28.8% dry weight) and glycogen (4.05–14.6% dry weight). A. noae accumulated lipid and glycogen for gonadal development during both maturation periods (late autumn/late spring–summer) to be used during spawning periods (winter/late summer–early autumn). However, proteins were mainly used to support reproductive allocation and played an important role on the energetic maintenance. Lipid and glycogen were found to be significantly related to temperature, salinity and chlorophyll a (p < 0.05). An increase of condition index (CI) was observed during spring and early summer when both temperature and food supply increased. The total fatty acid (TFA) profile of Ark shells was dominated by polyunsaturated fatty acids (PUFA) (33.8–49.6%), followed by saturated (SFA) (29.1–43.1%) and monounsaturated fatty acids (MUFA) (20.77–28.3%). A. noae soft tissues were also rich in macro-minerals (Na, Ca and Mg). The analysis of fatty acid trophic markers revealed that the diet of A. noae during the year of study was based on mixture food mainly on phytoplankton followed by zooplankton and other sources (bacteria, seagrass and macroalgae). Furthermore, the nutritional quality indices have revealed that A. noae is an excellent source of nutrients and a healthy food for human consumption. These data are useful to the conservation of natural stocks of A. noae and the development of sustainable aquaculture production of this shellfish species in the Bizerte lagoon.

Relative growth and reproductive cycle of the hermaphroditic Cardites antiquatus (Mollusca: Bivalvia) collected from the Bizerte channel (northern Tunisia)

Biologia ◽  
2017 ◽  
Vol 72 (10) ◽  
Author(s):  
Jihen Maatoug Béjaoui ◽  
Ferdaous Jaafar Kefi ◽  
Amal Lassoued ◽  
Najoua Trigui El Menif
Keyword(s):  
Reproductive Cycle ◽  
Northern Tunisia ◽  
Relative Growth

AbstractThe relative growth and the reproductive cycle of

Organochlorine and organobromine compounds in a benthic fish (Solea solea) from Bizerte Lagoon (northern Tunisia): Implications for human exposure

2013 ◽  
Vol 88 ◽  
pp. 55-64 ◽  
Author(s):  
Walid Ben Ameur ◽  
Yassine El Megdiche ◽  
Ethel Eljarrat ◽  
Sihem Ben Hassine ◽  
Barhoumi Badreddine ◽  
...  
Keyword(s):  
Human Exposure ◽  
Benthic Fish ◽  
Bizerte Lagoon ◽  
Northern Tunisia ◽  
Solea Solea

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

Biochemical composition during the reproductive cycle of a novel gastropod resource from Atlantic Patagonia

2021 ◽  
Author(s):  
Rocío A. Nieto-Vilela ◽  
Mariano Cumplido ◽  
Soledad Zabala ◽  
Gregorio Bigatti
Keyword(s):  
Reproductive Cycle ◽  
Biochemical Composition

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.

Temporal variation in the shore amphipod community in the supralittoral zone of Bizerte Lagoon (northern Tunisia)

Crustaceana ◽  
2012 ◽  
Vol 85 (4-5) ◽  
pp. 433-446 ◽  
Author(s):  
R. Jelassi ◽  
K. Nasri-Ammar
Keyword(s):  
Seasonal Variation ◽  
The Other ◽  
Cymodocea Nodosa ◽  
Bizerte Lagoon ◽  
Northern Tunisia ◽  
Frequent Form ◽  
Talitrus Saltator ◽  
Binocular Microscope ◽  
Orchestia Cavimana ◽  
Orchestia Montagui

Seasonal variation in the structure of the amphipod community on the banks of Bizerte Lagoon was studied at Menzel Jmil (37°13′8″N 09°55′1″E) from July 2006 to June 2007. The distance between the actual sites of collection (sampling points) and the shoreline varied from 70 cm in September to 6.8 m in December. Specimens were mainly collected from under roots of Cymodocea nodosa and Suaeda maritima. In the laboratory, the specimens of Amphipoda (N = 10 645) were preserved in ethanol 70%, identified, sexed, and counted under a binocular microscope. Monthly counts varied between 553 (November) and 1240 individuals (April). Eight species of talitrids were identified, based on the specific characters of their gnathopods and pereiopods. Furthermore, the results show that the amphipod community of Bizerte Lagoon is primarily composed of 3 species, Orchestia mediterranea, Orchestia gammarellus and Orchestia montagui. The species last-mentioned represented the most frequent form in summer, whereas the other two, Orchestia mediterranea and Orchestia gammarellus, dominated in autumn. Orchestia stephenseni, Platorchestia platensis, Talorchestia deshayesii, Talitrus saltator, and Orchestia cavimana, were also found. A subsequent analysis of various diversity parameters of the amphipod community indicated a seasonal variation in abundance, species richness, and diversity.

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