Reproduction of the cutlassfish &lt;i&gt;Trichiurus lepturus&lt;/i&gt; in the southern Brazil subtropical convergence ecosystem

Martins, Agnaldo Silva; Haimovici, Manuel

doi:10.3989/scimar.2000.64n197

Cited by 27 publications

(16 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The exact type of oocyte development pattern has to be confirmed in the future by checking the oocyte diameter distribution in specimens closer to the spawning time (Murua & Saborido-Rey, 2003). Nevertheless, histological studies on other gempylid and also trichiurid and scombrid species have shown that the asynchronous pattern generally prevails among those fish (Martins & Haimovici, 2000; Griffiths, 2002; Murua & Saborido-Rey, 2003; Abascal & Medina, 2005).…”

Section: Discussionmentioning

confidence: 99%

On the diet and reproduction of the oilfishRuvettus pretiosus(Perciformes: Gempylidae) in the eastern Mediterranean

2010

View full text Add to dashboard Cite

The oilfish,Ruvettus pretiosus, is an incidental by-catch of the drifting surface longlines targeting swordfish and Thunnidae in the Mediterranean and elsewhere. Despite its global distribution and frequent occurrence in the catch of many fishing gears, little is known about its biology. In this study we examined the dietary preferences and reproductive biology of this species from specimens caught in the eastern Mediterranean. The most numerous and frequently occurring prey items were benthopelagic fish, followed by cephalopods. The sex-ratio was highly skewed in favour of females (1:8.4), while histological examination of the collected ovaries displayed six developmental stages (perinucleolar, early and late lipid stage; early, middle and late vitellogenesis). Oocyte diameter ranged from 23–69 μm at the perinucleolar stage to 224–366 μm at the late vitellogenesis stage. Spawning is expected to occur during mid and late summer; however there were no individuals available from this period. The findings are discussed in relation to the ecology of the species.

show abstract

Section: Discussionmentioning

confidence: 99%

On the diet and reproduction of the oilfishRuvettus pretiosus(Perciformes: Gempylidae) in the eastern Mediterranean

2010

View full text Add to dashboard Cite

show abstract

“…For each individual sampled the following data were recorded: total length (TL) measured to the nearest millimetre; total weight (TW) measured to the nearest tenth of gram; sex and maturity stage. Maturity stages of males and females of the teleost fish were classified according to Martins & Haimovici (2000) in: I, juveniles/immature; II, resting; III, ripening; IV, ripening 2 (advanced); V, running; VI, spent; and VII, recovering. These stages were grouped into adults (II–VII) and juveniles (I) for general comparison purposes.…”

Section: Methodsmentioning

confidence: 99%

Evidence of seasonal changes in community structure for a coastal ecosystem in the central coast of Brazil, south-west Atlantic

et al. 2008

View full text Add to dashboard Cite

Wet biomass of principal plankton components and whole plankton standing stock were assessed in waters of the Heron Island ring reef and surrounding deep lagoon. Biomass of phytoplankton ranged between 30 to 120 mg m 23 , without its pronounced depletion over the reef shallows. Picocyanobacteria and prochlorophyte algae contributed over 70% of this biomass. Biomass of bacterioplankton varied between 75 to 340 mg m 23 , with its maximum over the reef flat. Biomass of planktonic protozoa's ciliates and zooflagellates ranged between 20 to 110 mg m 23 . The daytime biomass of zooplankton varied between 490 to 1590 mg m 23 in the deep lagoon in the zone of intense tidal currents. Over the reef shallows, it was 10-20 mg m 23 . At night, it rose there up to 800 to 4000 mg m 23 as the result of emerging demersal zooplankton from the benthic substrates. The time scale of nocturnal emerging by different taxa was also documented. Biomass of whole demersal zooplankton communities hiding by the daytime in bottom substrates at the reef flat was found to be over 100 g m 22 . Problems of nutrition planktivore reef fauna related to the plankton production and abundance are discussed. . (1983) Technique for enumeration of nanoplankton using epifluorescence microscopy. Limnology and Oceanography 33, 1595-1606. Crosbie N.D. and Furnas M.J. (2001) Growth rate of picocyanobacteria and phytoplankton in the central and southern Great Barrier Reef. Aquatic Microbial Ecology 24, 209-224. Yahel R., Yahel G. and Genin A. (2005) Near-bottom depletion of zooplankton over coral reefs: I: diurnal dynamics and size-distribution. Coral Reefs. 24, 75-85.

show abstract

“…In recent studies, it was found to be one of the most frequent and abundant bony ¢sh captured in southern Brazil in mid-water and bottom trawl surveys on the continental shelf (Mello et al, 1992;Haimovici et al, 1994Haimovici et al, , 1996. Because of its importance in the region, its biology and population dynamics have received increasing attention in recent years: Martins & Haimovici (1997) analysed its distribution and abundance in relation to ecological variables and Martins & Haimovici (2000) described its reproductive cycle and estimated its batch fecundity.…”

Section: Introductionmentioning

confidence: 99%

diet and feeding of the cutlassfish trichiurus lepturus in the subtropical convergence ecosystem of southern brazil

2005

Self Cite

View full text Add to dashboard Cite

The diet and feeding of the cutlass¢sh Trichiurus lepturus were studied based on analyses of the stomach contents of larvae, juveniles, and adults collected along the continental shelf and shelf break o¡ southern Brazil, from the Cape of Santa Marta Grande (28836 0 S) to Chu|¤ (34845 0 S). The larvae and pre-juveniles with a total length of 55 cm were found to have fed almost exclusively on calanoid copepods, whereas juveniles (5 to 30 cm) fed on small zooplanktonic crustaceans such as Lucifer faxoni and Promysys atlantica. On the other hand, sub-adults (30 to 70 cm), fed on euphausiids, mainly Euphausia similis, and small ¢sh, mostly anchovy Engraulis anchoita. Adults (70 to 160 cm) fed on a wide range of larger prey, such as anchovy, sciaenid ¢sh, cephalopods and coastal shrimps, as well as euphausiids. The juveniles and sub-adults fed more intensively than adults during the warm-water season whereas adults fed more intensively during the cold-water season. Feeding activity was more intense at night, while cannibalism was more frequent during the warm season, when biological productivity was lower. Finally, diet diversity was higher in coastal waters, during the warm season. The abundance of cutlass¢sh o¡ southern Brazil may be explained by the fact that it is adapted to feed on a wide size-range of both pelagic and demersal prey.

show abstract

Reproduction of the cutlassfish <i>Trichiurus lepturus</i> in the southern Brazil subtropical convergence ecosystem

Cited by 27 publications

References 7 publications

On the diet and reproduction of the oilfishRuvettus pretiosus(Perciformes: Gempylidae) in the eastern Mediterranean

On the diet and reproduction of the oilfishRuvettus pretiosus(Perciformes: Gempylidae) in the eastern Mediterranean

Evidence of seasonal changes in community structure for a coastal ecosystem in the central coast of Brazil, south-west Atlantic

diet and feeding of the cutlassfish trichiurus lepturus in the subtropical convergence ecosystem of southern brazil

Contact Info

Product

Resources

About