A study of the life history of Brazilian sardines, Sardinella aurita: I. distribution and abundance of sardine eggs in the region of Ilha Grande, Rio de Janeiro

Matsuura, Yasunobu

doi:10.1590/s0373-55241971000100004

Cited by 24 publications

(20 citation statements)

References 4 publications

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“…Due to the fact that the fishery According to these data, it appears that female sardines spawn between 20.00 and 01.00 hours at night. This finding agrees with the results of Matsuura (1971), who encountered newly spawned eggs between 20.00 and 24.00 hours.…”

Section: Gonadal Cycle and Post-ovulatory Folliclessupporting

confidence: 93%

Aspects of the spawning biology of the Brazilian sardine, Sardinella brasiliensis (Steindachner, 1879), (Clupeidae)

Isaac-Nahum¹,

Cardoso²,

Servo

et al. 1988

Journal of Fish Biology

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Biological data, size frequency distribution of intraovarian oocytes, maturity indices and histological observations of the gonads were used to assess the spawning cycle of S. brasiliensis. sampled September 1981-August 1982 throughout the main fishing area off the Brazilian coast ( 2 2 3 to 28"s). Post-ovulatory follicles are described and classified, and the incidence of mature females displaying these structures was calculated. The main findings were (a) spawning occurred during the spring and summer with a maximum in December and January; (b) spawning occurred throughout the area studied; (c) spawning was fractional; (d) average batch fecundity was 26 OOO oocytes per female, or 393 eggs g-'; (e) spawning frequency reached values of approximately 50% during the spawning peak, but was sensibly lower during the other months of spawning activity.

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Section: Gonadal Cycle and Post-ovulatory Folliclessupporting

confidence: 93%

Aspects of the spawning biology of the Brazilian sardine, Sardinella brasiliensis (Steindachner, 1879), (Clupeidae)

Isaac-Nahum¹,

Cardoso²,

Servo

et al. 1988

Journal of Fish Biology

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“…The model also simulates larval vertical swimming behavior in the form of diurnal vertical migration (DVM) between the surface and a fixed depth. Measurements show that Sardinella aurita eggs are concentrated in the surface mixed layer over the continental shelf (Matsuura, ). As the mixed‐layer base is particularly shallow in the region of interest (between 10 and 30 m; De Boyer Montégut et al ., ), and given the lack of observations of diel migration, we tested a set of four DVM depths: 20, 30 m (within the mixed layer), 60 and 100 m (below the mixed layer depth), hereinafter DVM20, DVM30, DVM60 and DVM100, respectively.…”

Section: Methodsmentioning

confidence: 99%

Do Sardinella aurita spawning seasons match local retention patterns in the Senegalese–Mauritanian upwelling region?

Mbaye

Brochier

Échevin

et al. 2015

Fisheries Oceanography

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Sardinella aurita is the most abundant small pelagic fish in the Senegalese–Mauritanian region. The success of its reproduction crucially depends on the local circulation as this determines whether larvae reach coastal nursery areas favorable to their survival or are dispersed into the open ocean. As a first step towards evaluating sardinella vulnerability to climate‐driven hydrodynamical changes, this study aims at underpinning how transport pathways drive optimal spatial and seasonal patterns for sardinella reproduction. We have used two estimates of the Senegalese–Mauritanian coastal seasonal circulation simulated by two hydrodynamical model configurations that differ in their forcing and topography. Nursery areas are determined by evaluating coastal retention with a Lagrangian individual‐based model that accounts for processes such as diel vertical migration and mortality as a result of lethal temperature exposure. Our results suggest that the shelf zones located at the Arguin Bank (19.5°N–21°N) and south of Senegal (12°N–14.75°N) are highly retentive. We find maximum retention rates in July–August and November–December over the Arguin Bank; from February–July and November–December over the southern Senegalese shelf; and lower retention rates over the central region (14.75°N–19.5°N) that are locally maximum in June–July when the upwelling weakens. These retention areas and their seasonality are in agreement with previously reported spawning patterns, suggesting that the Sardinella aurita spawning strategy may result from a trade‐off between retention patterns associated with the seasonal circulation and food availability. Exposure to lethal temperatures, although not well studied, could be a further limiting factor for spawning. The Lagrangian analysis reveals important connectivity between sub‐regions within and south of the system and hence underlines the importance for joint management of the Sardinella aurita stock.

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“…Bongo nets (60 cm diameter) equipped with 0·5 mm mesh were deployed every 20 nautical miles (37·04 km), except for two cruises (January 1980 and January 1981), where samples were collected at 30 nautical miles (55·56 km) interval. Plankton samples were fixed in a 10% formalin solution, and eggs were identified (Matsuura, 1971). Abundances were subsequently transformed to number of eggs per m 2 (egg density) using the equation proposed by Tanaka (1973).…”

Section: Methodsmentioning

confidence: 99%

“…The Brazilian sardine Sardinella brasiliensis (Steindachner) supports one of the most important commercial fisheries in Brazil and has been the focus of scientific research since the 1950s (Matsuura, 1971; Saccardo & Rossi‐Wongtschowski, 1991; Castello, 2007). Its distribution is confined to the south‐east Brazil Bight (SBB), a highly productive semi‐enclosed marine ecosystem that accounts for >20% of the marine fisheries production in Brazil between 1977 and 1995 (FAO, 2000).…”

Section: Introductionmentioning

confidence: 99%

Spatial analysis of egg distribution and geographic changes in the spawning habitat of the Brazilian sardine Sardinella brasiliensis

Gigliotti

Gherardi

Páes

et al. 2010

Journal of Fish Biology

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This paper establishes the spawning habitat of the Brazilian sardine Sardinella brasiliensis and investigates the spatial variability of egg density and its relation with oceanographic conditions in the shelf of the south-east Brazil Bight (SBB). The spawning habitats of S. brasiliensis have been defined in terms of spatial models of egg density, temperature-salinity plots, quotient (Q) analysis and remote sensing data. Quotient curves (Q(C)) were constructed using the geographic distribution of egg density, temperature and salinity from samples collected during nine survey cruises between 1976 and 1993. The interannual sea surface temperature (SST) variability was determined using principal component analysis on the SST anomalies (SSTA) estimated from remote sensing data over the period between 1985 and 2007. The spatial pattern of egg occurrences in the SBB indicated that the largest concentration occurred between Paranaguá and São Sebastião. Spawning habitat expanded and contracted during the years, fluctuating around Paranaguá. In January 1978 and January 1993, eggs were found nearly everywhere along the inner shelf of the SBB, while in January 1988 and 1991 spawning had contracted to their southernmost position. The SSTA maps for the spawning periods showed that in the case of habitat expansion (1993 only) anomalies over the SBB were zero or slightly negative, whereas for the contraction period anomalies were all positive. Sardinella brasiliensis is capable of exploring suitable spawning sites provided by the entrainment of the colder and less-saline South Atlantic Central Water onto the shelf by means of both coastal wind-driven (to the north-east of the SBB) and meander-induced (to the south-west of the SBB) upwelling.

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A study of the life history of Brazilian sardines, Sardinella aurita: I. distribution and abundance of sardine eggs in the region of Ilha Grande, Rio de Janeiro

Cited by 24 publications

References 4 publications

Aspects of the spawning biology of the Brazilian sardine, Sardinella brasiliensis (Steindachner, 1879), (Clupeidae)

Aspects of the spawning biology of the Brazilian sardine, Sardinella brasiliensis (Steindachner, 1879), (Clupeidae)

Do Sardinella aurita spawning seasons match local retention patterns in the Senegalese–Mauritanian upwelling region?

Spatial analysis of egg distribution and geographic changes in the spawning habitat of the Brazilian sardine Sardinella brasiliensis

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