https://www.um.edu.mt/library/oar/handle/123456789/37399 2026-06-26T22:02:48Z https://www.um.edu.mt/library/oar/handle/123456789/37511 Title: Comparison of morphomeristical variations of Mediterranean and Red Sea populations of the Suez Canal migrant Sargocentron rubrum Authors: Golani, Daniel Abstract: Nine morphomeristical characters of squirrelfish, Sargocentron rubrum (Forsskal 1775) were compared between Mediterranean and Red Sea populations to examine changes caused by different environments. The significantly lower number of lateral line scales and vertebrae in the Mediterranean fishes is attributed to the higher temperature during the spawning season. The significant difference of the proportion of suborbital spinulation and the shape of the anterior tip of the nasal bone is inferred to be due to a founder effect. No significant difference was found in the relationship between eye diameter and preopercular spine length and standard length, nor in the number of dorsal and anal rays and nostril spinulation. 1987-01-01T00:00:00Z https://www.um.edu.mt/library/oar/handle/123456789/37510 Title: CENTRO : volume 1 : issue 3 Editors: Axiak, Victor Abstract: Table of contents: 1/ PEDLEY, H. M. - The Ghar Lapsi limestones: sedimentology of a Miocene intra-shelf graben -- 2/ BARGAGLI, R., D'AMATO, M. L. - Trace metal contamination in marine and riverine sediments around San Rossore Park (Italy) -- 3/ GOLANI, D. - Comparison of morphomeristical variations of Mediterranean and Red Sea populations of the Suez Canal migrant Sargocentron rubrum -- 4/ PUCHER-PETKOVIC, T., MARASOVIC, I. - Contribution it la connaissance d 'une poussee extraordinaire d'algues unicellulaires (Adriatique septentrionale) 1987-01-01T00:00:00Z https://www.um.edu.mt/library/oar/handle/123456789/37507 Title: Contribution a la connaissance d'une Poussee extraordinaire d' algues unicellulaires (Adriatique Septentrionale) Authors: Pucher-Petkovic, Tereza; Marasovic, Ivona Abstract: The phenomenon known as "sea-water bloom" ("mare sporco", "Meeresbliite") was observed in the northern Adriatic in summer 1983. It appears as a gelatinous, dense mass floating at the sea surface. Samples from Crikvenica (July) and Lopar, Rab Island (August) were analysed. A total of 58 diatoms, of which 32 benthic species, 25 dinoflagellates and 10 coccolithophorids were identified by microscopy. A recently described genus, Spatulodinium Cachon & Cachon, represented by the type species S. pseudonoctiluca (Pouchet) Cachon & Cachon, was also found. With respect to the known ecology of individual algal groups it may be concluded that benthic diatoms had reproduced intensively at the sea bottom a long while before the phenomenon became visible at the sea surface. Reproduction is also the period of the most intensive secretion of mucus. Release of the gelatinous mass from the sea bottom at summer temperatures which are unfavourable for diatoms, is actually the end of the bloom. A gelatinous mass full of gases released by bacterial degradation begins to ascend and on its way towards the sea surface, it embeds plankton organisms. In the final stage torn mucus descends to the bottom where it is gradually completely degraded. 1987-01-01T00:00:00Z https://www.um.edu.mt/library/oar/handle/123456789/37506 Title: The Għar Lapsi limestones : sedimentology of a Miocene intra-shelf graben Authors: Pedley, Hugh Martyn Abstract: The Għar Lapsi succession of west Malta developed during a Late Tortonian Early Messinian episode of tectonism associated with the Magħlaq Fault Zone. These syntectonic strata, Porites coral bioherms bioclastic packstones and wackestones, debris flow deposits and calciturbidites form a prism banked against the southwest- facing fault-line but are absent from the island of Filfla which lies about 4.5km to the west. Faunal correlation is imprecise; however, the macro faunas and general foraminiferal micro faunas of the Porites bioherm show it to be correlated with the Tal-Pitkal Member (Late Tortonian). The overlying calciturbidites and debris flow deposits are part of the Gebel Imbark Member (Early Messinian). These strata are part of a half-graben fill which cuts the Miocene shelf between Filfla and the present Magnlaq cliffs of Malta. The absence of planktonic Foraminifera from the graben fill sequence and low percentages recorded from strata on Filfla island confirm that this structure was intra-shelf in origin rather than a shelf edge feature. Calciturbidite laminites and debris flow deposits, developed during the Lower Messinian, were deposited during a eustatic fall of Mediterranean sea-level concomitant with the Lower Evaporite Complex of Sicily. 1987-01-01T00:00:00Z