Diet composition of the juvenile chub mackerel (Scomber japonicus) in the Aegean Sea (Izmir Bay, Turkey)

Sever, Tuncay Murat; Bayhan, Bahar; Bilecenoğlu, Murat; Mavili, Süleyman

doi:10.1111/j.1439-0426.2006.00705.x

Cited by 16 publications

(10 citation statements)

References 3 publications

(4 reference statements)

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“…The range of chub mackerel specimen lengths presented in this study (10.1–39.1 cm) is wider than previously reported in the Mediterranean: 15.0–20.0 in the Aegean Sea (Sever et al., 2006); 17.0–27.0 cm in the Marmora Sea (Tuggac, 1957); and 9.0–31.0 cm in Greek waters (Kiparissis et al., 2000). These differences may be due to different fishing/sampling techniques or different sampling periods.…”

Section: Discussioncontrasting

confidence: 53%

The reproductive traits of Scomber japonicus (Houttuyn, 1782) in the Eastern Adriatic Sea

Keč

Zorica

2011

Journal of Applied Ichthyology

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The aim of the present study was to investigate the fisheries biology of Scomber japonicus (Houttuyn, 1782) in the Adriatic Sea, to enable implementation of appropriate regulatory measures for fisheries. Reproductive biology and sexual patterns of S. japonicus (chub mackerel) were examined from monthly random samples of commercial catches from purse seine nets (10 mm stretched mesh size) in the eastern Adriatic Sea. The annual mean chub mackerel fork length (FL) was examined from 1998 to 2007. Average fork lengths were approximately 25 cm between 1998 and 2002, decreasing to 22 cm between 2003 and 2007. In addition, sex ratios fluctuated as a function of size and month: females were more abundant in the smaller length classes, as well as before and after spawning; males were more abundant in the larger length classes and during spawning. The overall sex ratio was 0.68; females were significantly predominant. 50% of the chub mackerel population was sexually mature at a FL of 18.3 cm, and both males and females reached sexual maturity at FLs of 20.4 cm and 16.8 cm, respectively. Based on gonad maturity stages, gonad weight and gonadosomatic index, chub mackerel spawned from May to August, with peak spawning in June for both sexes. The mean absolute fecundity was 181 277 ± 62 090 oocytes per ovary. A positive exponential correlation was found between fecundity and fork length, gonad weight, and total chub mackerel weight (r 2 = 0.640; r 2 = 0.686 and r 2 = 0.607, respectively).

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Section: Discussioncontrasting

confidence: 53%

The reproductive traits of Scomber japonicus (Houttuyn, 1782) in the Eastern Adriatic Sea

Keč

Zorica

2011

Journal of Applied Ichthyology

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“…In the Canary Islands, the chub mackerel supports an important commercial fishery (Lorenzo et al 1995, Lorenzo & Pajuelo 1996. In the Mediterranean and Black Sea, a major proportion of the S. colias is taken by Turkey fleets (Sever et al 2006) but is also a species of high commercial interest in other places as the Hellenic seas (Kiparissis et al 2000). Although annual landings of chub mackerel have decreased during the last few years in the Azores and the Mediterranean (Carvalho et al 2002, Sever et al 2006, the capture of this species has seen an increasing trend since 1991 in the Northwest Africa region, being the second most important species (following Sardina pilchardus) landed in Morocco in 2006(FAO 2008.…”

Section: Introductionmentioning

confidence: 99%

Age and growth of the Spanish chub mackerel Scomber colias off southern Spain: a comparison between samples from the NE Atlantic and the SW Mediterranean

Velasco¹,

Árbol

Baro³

et al. 2011

Rev. biol. mar. oceanogr.

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Age and growth of the Spanish chub mackerelResumen.-Se analiza la edad y los patrones de crecimiento del estornino Scomber colias en aguas del sur de España, procedentes de dos áreas diferentes, costa Atlántica y Mediterráneo occidental, en el periodo comprendido entre octubre de 2003 y septiembre de 2004. La relación longitud-peso viene dada por la ecuación TW=0,0015 TL 3,5289 (r 2 = 0,99, donde TW= peso total en g, TL=longitud total en mm). La edad se determinó mediante la lectura (conteo e interpretación) de los anillos de crecimiento de otolitos sagitta en 221 ejemplares capturados por la flota comercial andaluza y durante las campañas oceanográficas de prospección de recursos marinos. En los otolitos, anualmente fueron depositados dos anillos, uno opaco y otro hialino. La zona opaca se formó principalmente en primavera y verano, mientras que la zona hialina se formó en otoño e invierno. La relación existente entre el radio del otolito y la longitud del pez, se describe mediante la ecuación: TL = 43,881 * OR 1,245 (r 2 = 0,93, donde OR= radio del otolito). Los parámetros de la curva ajustada de crecimiento de von Bertalanffy fueron estimados para los dos sexos de forma conjunta así como para todo el periodo de estudio (L ∞ = 43 cm, K = 0,27 para el Golfo de Cádiz, y L ∞ = 40 cm, K = 0,37 para el Mar de Alborán, donde L ∞ se define como la talla máxima teórica, y K como la rapidez con la que la curva se torna asintótica). No se han encontrado diferencias de crecimiento entre las distintas áreas de estudio, lo que sugiere que el Estrecho de Gibraltar no supone una barrera geográfica para el normal desarrollo del ciclo vital de esta especie. Por otro lado, gracias a las condiciones medioambientales similares del Mar de Alborán y del Golfo de Cádiz, el Estrecho de Gibraltar es una vía de comunicación importante que permite la existencia de un flujo larval entre el Atlántico y el Mediterráneo.Palabras clave: Scombridae, otolito, parámetros de von Bertalanffy, Estrecho de Gibraltar Abstract.-This paper studies the age and growth patterns of the Spanish chub mackerel Scomber colias off southern Spain collected from two different areas, Atlantic coast and Western Mediterranean, from October 2003 to September 2004. The length-weight relationship was given by TW=0.0015 TL 3.5289 (r 2 = 0.99, where TW= total weight in g, TL= total length in mm). Age was determined by interpreting and counting growth rings on the sagitta otoliths of 221 individuals caught by the commercial Andalusian fleet and during fisheries research surveys. Two rings, one opaque and one hyaline, were laid down each year on the otoliths. The opaque zone was formed during spring and summer and the hyaline one during autumn and winter. The otolith radius-length of the fish relationship was described by the equation: TL = 43.881 * OR 1.245 (r 2 = 0.93, where OR= otolith radius). The parameters of the fitted von Bertalanffy growth curve were estimated for sex combined for the whole period (L ∞ = 43 cm, K = 0.27 for the Gulf of Cadiz, and L ∞ = 40 cm, K =...

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“…Fish was an important prey in the diet of S. colias and T. picturatus around Madeira waters, alongside zooplanktonic species. To the best of the authors’ knowledge, this was only described for S. colias in two other studies off Mauritania and Turkey coasts (Gushchin & Corten, 2017; Sever et al ., 2006), as fish are often reported having little importance in the Atlantic and in the Mediterranean. Species such as M. scolopax , S. pilchardus , myctophids (Castro, 1993; Denda et al ., 2017; Gushchin & Corten, 2017; Sever et al ., 2006; Wahbi et al ., 2015a), and S. saurus (this study) can be found in mackerel's stomachs in these regions.…”

Section: Discussionmentioning

confidence: 99%

“…The different diet composition of these two species is related to their feeding behaviour and physiology of the feeding apparatus and not to their size, as the authors chose individuals of similar lengths and, presumably, similar agility. These results agree with those of other studies in the Mediterranean (Battaglia et al ., 2019; Sever et al ., 2006), the subtropical and tropical eastern Atlantic (Castro & Santana del Pino, 1995; Denda et al ., 2017; Gushchin & Corten, 2017; Wahbi et al ., 2015a) and along the Iberian coast (Bachiller & Irigoien, 2015; Garrido et al ., 2015). Other species of the genus Trachurus , such as T. lathami , also include both plankton and fish species in their diet (Carvalho & Soares, 2006).…”

Section: Discussionmentioning

confidence: 99%

Diet and trophic position of two mackerel species in the archipelago of Madeira, Portugal

Romero

Vieira

Garrido

et al. 2021

Journal of Fish Biology

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The Atlantic chub mackerel Scomber colias and the blue jack mackerel Trachurus picturatus are two abundant species in the Macaronesia region which includes the archipelago of Madeira, Portugal. Both are key species in the trophic web, being important prey for several local top predators, such as seabirds and marine mammals. Nonetheless, little is known about their feeding ecology in oceanic environments. In this study, the authors describe the seasonal variation in the diet of S. colias and T. picturatus in the oceanic region of Madeira throughout a year. Visual inspection of stomach contents revealed that S. colias fed on a broader range of prey groups than T. picturatus, but for both species, zooplankton (particularly calanoid copepods) and fish were the most important food items. The diet of S. colias included a higher proportion of fish, namely Atlantic saury Scomberesox saurus and S. colias, than that of T. picturatus, that included mostly the longspine snipefish Macroramphosus scolopax. T. picturatus consumed a higher proportion of decapods and other copepods. Seasonal variation was found in the diet of both species, with zooplanktonic species being more important in colder months (February to April) for S. colias and during warm months (May to October) for T. picturatus. Their diet in other seasons was dominated by fish. Although they consume similar prey, carbon and nitrogen stable isotope analysis of muscle of S. colias and T. picturatus showed little overlap in their diets, and T. picturatus showed higher δ15N and a narrower isotopic niche.

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Diet composition of the juvenile chub mackerel (Scomber japonicus) in the Aegean Sea (Izmir Bay, Turkey)

Cited by 16 publications

References 3 publications

The reproductive traits of Scomber japonicus (Houttuyn, 1782) in the Eastern Adriatic Sea

The reproductive traits of Scomber japonicus (Houttuyn, 1782) in the Eastern Adriatic Sea

Age and growth of the Spanish chub mackerel Scomber colias off southern Spain: a comparison between samples from the NE Atlantic and the SW Mediterranean

Diet and trophic position of two mackerel species in the archipelago of Madeira, Portugal

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