Reproductive Biology of Round Sardinella (Sardinella Aurita) (Valenciennes, 1847) in  Senegalese Coastal Waters

Ndiaye, Ismaïla Abderhamane; Sarr, Alassane; Faye, A.; Thiaw, Modou; Diouf, Malick; Bâ, Kamarel; Ndiaye, Waly; Lazar, Najih; Thiaw, Omar Thiom

doi:10.5296/jbls.v9i1.12222

Cited by 3 publications

(8 citation statements)

References 10 publications

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“…As in the present study, other authors had observed that females of S. aurita slightly outnumber males or are approximately equal to males in Mauritanian waters (Wagué & M'Bodj, 2002; Chesheva, 2006). A slight predominance of females has also been observed in South Morocco (Baali et al ., 2017), Senegal (Boëly, 1982; Ndiaye et al ., 2018; Baldé et al ., 2019 b ) and in the Mediterranean Sea (Tsikliras & Antonopoulou, 2006; Mustac & Sinovcic, 2012). Nevertheless, a significant unbalanced sex-ratio has been described in the Mediterranean Sea (Navarro, 1932; Dahel et al ., 2016) and in the SW Atlantic (Gassman et al ., 2008; Tagliafico et al ., 2008).…”

Section: Discussionmentioning

confidence: 99%

“…The lengths at first maturity (LFMs) estimated in the present study (~24 cm TL) are similar to results obtained by other authors for the Mauritanian round sardinella (ter Hofstede et al ., 2007; Ndiaye et al ., 2018). The species reaches its maturity at bigger sizes both in NW Africa (including South Morocco) (Baali et al ., 2015, 2017; Amenzoui & Baali, 2018), compared with the LFM estimated southwards (Castro et al ., 2017), and also in the Mediterranean Sea (Tsikliras & Antonopoulou, 2006) and in SW Atlantic waters (Gassman et al ., 2008; Tagliafico et al ., 2008), probably due to the influence of the powerful upwelling in the area.…”

Section: Discussionmentioning

confidence: 99%

“…In NW Africa, round sardinella spawns year round with a maximum period from June to September–December (depending on the area included) (Boëly et al ., 1982 a ; Chesheva, 2006; Ndiaye et al ., 2018; Baldé et al ., 2019 b ). Therefore, the major spawning period observed in the present study (from June to November) matches with the migrations related to the sexual cycle of the species described in the CECAF region (Boëly et al ., 1982 a ; Garcia, 1982).…”

Section: Discussionmentioning

confidence: 99%

“…However, essential biological studies on S. aurita are required to fill the current gaps in knowledge about its life-history in the sub-region in order to implement proper and specific management measures. One key element to manage a fish stock is knowledge of the characteristics of the reproductive cycle, which has been unevenly addressed for S. aurita in the area, including CE Atlantic (Pham-Thouc, 1973; Garcia, 1982; Chesheva, 2006), Morocco (Ettahiri et al ., 2003; Baali et al ., 2015, 2017; Amenzoui & Baali, 2018), Mauritania (Boëly et al ., 1982 a ; ter Hofstede et al ., 2007), Mauritania-Senegal (Mbaye et al ., 2015) and Senegal (Boëly, 1982; Ba et al ., 2016; Ndiaye et al ., 2018). Regarding the growth characterization of round sardinella in the area, different methods have been used.…”

Section: Introductionmentioning

confidence: 99%

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Life history parameters of the round sardinella Sardinella aurita in the Central East Atlantic off north-west Africa

et al. 2020

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Sardinella aurita has become an important source of fish protein-intake in NW African countries, where one stock is considered from Morocco to south Senegal, performing seasonal reproductive migrations along the coast. Although data are limited for the fisheries involved and for life-history knowledge of the species in the area, a precautionary approach is recommended to avoid overexploitation. Commercial landings of round sardinella produced by the European freezer-pelagic trawlers operating in Mauritanian waters were analysed between May 2004 and February 2012. The length-weight relationships (LWRs) (N = 40,725) did not show significant differences between sexes. Ripening round sardinellas were present throughout the year, but spawning effort rose between June and December. The length at first maturity for males and females was estimated at 27.7 cm TL (2.1 years) and 28.1 cm TL (2.2 years), respectively. Ages were interpreted from otoliths, varying from 0 to 8 years. Von Bertalanffy growth parameters resulted in non-statistically significant differences between sexes (P = 0.28). Natural mortality was estimated at ~0.63 year–1. The results provide important biological information for fisheries assessment of a species that plays an important key role in the current climate change scenario and for the economies of the riparian countries.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Life history parameters of the round sardinella Sardinella aurita in the Central East Atlantic off north-west Africa

et al. 2020

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“…The overall sex ratio obtained for the round sardinella in the Canary Islands resulted in a significant unbalance towards males, in contrast with NW African waters where balanced sex ratios have been observed off Mauritania (Wagué & M'Bodj, 2002; Chesheva, 2006), or where females predominated in landings off South Morocco (Baali et al ., 2017), Mauritania (Jurado-Ruzafa et al ., 2020) and Senegal (Boëly, 1982; Ndiaye et al ., 2018; Baldé et al ., 2019). Unbalance to females is also reported in the Mediterranean Sea (Tsikliras & Antonopoulou, 2006; Mustac & Sinovcic, 2012).…”

Section: Discussionmentioning

confidence: 99%

Reproductive traits of the round sardinella in the Canary Islands (Spain, NW Africa)

Jurado-Ruzafa

Olano²,

Arocha³

et al. 2022

J. Mar. Biol. Ass.

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The present study aims to investigate the reproductive biology of the small pelagic Sardinella aurita Valenciennes, 1847 in the Canary Islands, to enable its reliable assessment and advise on appropriate management measures for a fishing resource showing a declining trend in landings. Reproductive biology and sexual patterns of round sardinella were examined from monthly random samples of commercial catches landed by the artisanal purse-seine fleet. The landings' length frequencies, ranging between 9–32 cm (based on the total lengths, TL), were recorded from 2013–2019. The overall mean value of TL was 20.9 cm, with annual mean values between 20–22 cm, except in 2016 (TL = 19 cm). The overall sex ratio M:F was 1:0.92, with males significantly predominant. Sex ratios fluctuated as a function of size and month: females were more abundant in the larger length classes, as well as before and after spawning, whereas males were more abundant in the smaller length classes and during spawning. Based on gonad maturity stages and gonadosomatic index, round sardinella spawns during almost all the year, with a peak in January–February and a resting period during October–November. The length at first maturity was estimated at TL of 18.2 cm, notably smaller than the value obtained for the NW African coastal waters where the demographic structure in round sardinellas' landings is totally different.

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Growth, mortality, recruitment pattern, and exploitation rate of shared stock flying fish (Exocoetidae) at border area of Indonesia and Timor Leste in Ombai Strait

Rehatta

Kamal

Boer

et al. 2021

IOP Conf. Ser.: Earth Environ. Sci.

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Flying fish (Exocoetidae) is one important small pelagic fisheries commodity in border areas of Indonesia and Timor Leste. However, the data of population parameters in Ombai Strait are not yet known, which is important to inform unit stock management and sustainable fisheries. This study aimed to provide information about growth and mortality parameters, recruitment pattern, and exploitation rate of flying fish. Data collection was carried out during May 2018-June 2019 by measuring and observing the flying fish landed at the fish landing sites in Belu Indonesia and Bobonaro Timor Leste. Data analysis used the FAO-ICLARM Stock Assessment Tools (FiSAT) program. The results showed that the asymptotic length (L∞) was 330.5 mm, growth constant (K) was 0.99 per year, and growth performance indices (Φ) was 0.50. The natural mortality (M) was 0.92 per year, fishing mortality (F) was 0.12 per year, and total mortality (Z) was 1.04 per year. The highest recruitment occurs in May to September with peak season in June (14.82%) and September (15.16%). Exploitation rate (E) flying fish in the border area of Indonesia and Timor Leste in Ombai Strait is relatively low about 0.11 and still at a rational and sustainable utilization range (E < 0.5).

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Reproductive Biology of Round Sardinella (Sardinella Aurita) (Valenciennes, 1847) in Senegalese Coastal Waters

Cited by 3 publications

References 10 publications

Life history parameters of the round sardinella Sardinella aurita in the Central East Atlantic off north-west Africa

Life history parameters of the round sardinella Sardinella aurita in the Central East Atlantic off north-west Africa

Reproductive traits of the round sardinella in the Canary Islands (Spain, NW Africa)

Growth, mortality, recruitment pattern, and exploitation rate of shared stock flying fish (Exocoetidae) at border area of Indonesia and Timor Leste in Ombai Strait

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