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This paper presents some biological features of juvenile and adult specimens of Atlantic bonito, Sarda sarda (Bloch, 1793), in the eastern middle Adriatic Sea. A total of 194 specimens were analysed, of which 93 were juveniles and 101 were adults. Juvenile individuals ranged from 5.7 to 8.4 cm while adults ranged from 39.3 to 56.7 cm. In order to a...
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... bonito specimens were analysed immediately after landing. Morphometric meas- urements were taken to the nearest 0.1 cm. The weight of each fish was recorded by digital scale with accuracy of ± 0.01 g. Sex was deter- mined according to the shape and appearance of the gonads; assessment of gonad maturity stages was determined by macroscopical scale (SINOVČIĆ, 1978). Nine morphometric measure- ments (LT -total length, LF -fork length, LA -distance of anal fin, LH -head length, LD1 -first dorsal fin base, LD2 -second dorsal fin base, LP -pelvic fin, ED -eye diameter, BD -max. body depth) were examined (Fig. 2). They were expressed as % of fork length (LF). Fork length was expressed as % of total length (LT) (Fig. ...
Context 2
... bonito specimens were analysed immediately after landing. Morphometric meas- urements were taken to the nearest 0.1 cm. The weight of each fish was recorded by digital scale with accuracy of ± 0.01 g. Sex was deter- mined according to the shape and appearance of the gonads; assessment of gonad maturity stages was determined by macroscopical scale (SINOVČIĆ, 1978). Nine morphometric measure- ments (LT -total length, LF -fork length, LA -distance of anal fin, LH -head length, LD1 -first dorsal fin base, LD2 -second dorsal fin base, LP -pelvic fin, ED -eye diameter, BD -max. body depth) were examined (Fig. 2). They were expressed as % of fork length (LF). Fork length was expressed as % of total length (LT) (Fig. ...
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Citations
... Israeli Journal of Aquaculture -Bamidgeh tically significant differences were recorded according to sexes [44][45][46][47] and size groups. [48][49][50] The LWR parameters (a, b) of the fish are affected by a series of factors such as season, habitat, gonad maturity, sex, diet, stomach fullness, health, preservation techniques and annual differences in environmental conditions. 51 Such differences in values b can be ascribed to one or a combination of most of the factors, including differences in the number of specimens examined, area/season effects, and distinctions in the observed length ranges of the specimens caught, to which duration of sample collection can be added as well. ...
The present study presents length-weight, length-length, length-girth relationships, and biometry of male and female specimens of saddled seabream, Oblada melanurus (Linnaeus, 1758), in the Turkish Aegean Sea. The length-length and length-weight relationships were calculated by measuring 516 individuals. The total length values of all male and female O. melanurus specimens were in the range of 17.2-30.7 and 18.5-30.0 cm, respectively, and the mean values were 21.84±2.04 and 22.44±2.12 cm, respectively. The length-weight relationships were W=0.0110TL 3.057 for males, W=0.0114TL 3.043 for females, and W=0.0089TL 3.122 for all the specimens. The results denoted a high correlation (r²=0.966; p<0.001) in the length-length relationships. Furthermore, 287 individuals (105 females and 182 males) were examined for length-girth relationships and biometric analyses. Ten morphometric characters were analyzed to analyze biometry. In conclusion, no statistically significant differences were determined in morphology between the sexes (p<0.05).
... Morphometric characteristics of the AB (seeFig. 2inZorica and Sinovčić, 2008) and the equation given below were used for length conversion from FL to TL. For ABT, a length-length relationship estimated by Perçin and Akyol(2009)was used. ...
In this study, we first identify seven criteria for the design of biomimetic robotic fish and focus on two of these tasks: shape and hydromechanics. For this purpose, fish body part measurements were obtained using previous work and also captured and harvested fish samples to construct computer-aided design (CAD) models of three fish species: Scomber scombrus, Sarda sarda, and Thunnus thynnus. Dead body drag and caudal fin flapping were considered as two separate problems. Computational simulations were carried out to determine drag and propulsive performance. Body drag simulations showed that the Reynolds dependence of the drag coefficient of three different species can be adequately expressed by a single laminar scaling correlation. At the same length and swimming speed, the Atlantic mackerel experiences the least drag. Caudal fin deformation simulations showed that the Atlantic bluefin tuna offers the highest thrust and efficiency. Peak efficiency is in the range of 31–35 percent observed at the same optimal Strouhal number, St = 0.5, for all species. It is shown that the aspect ratio as the main length scale influences propulsion performance.
... The features of the species and habitat affect the composition of erythro-cytes and leukocytes of fish, the main types of which are mature and basophilic erythrocytes, normoblasts, as well as lymphocytes, monocytes, and neutro-, eosin-, and basophils, as well as a small proportion of immature forms of leukocytes. The ratio of individual cell types may indicate the physiological state (or status) of fish and the presence of biotic and abiotic stress factors (Ivanova, 1983;Parish et al., 1986;Golovina and Trombitsky, 1989;Zhiteneva et al., 1989;Tochilina, 1994;Mikryakov et al., 2001). ...
... The alfonsino specimens used in the biological analysis varied from 11 to 27 cm in length and from 26 to 544 g in weight, which differs from the literature data, where individuals have reached the size of 70 cm in the Gulf of Mexico, 70 cm in the Atlantic, 44 cm in the Indian, and 50 cm in the Pacific oceans; the usual size is 40 cm (Parin et al., 1995;Lehodey and Grandperrin, 1996;Sommer et al., 1996;Santamaria et al., 2006). Bonito can reach 61 cm in the Mediterranean Sea (Campo et al., 2006;Zorica, 2008) and 91 cm in the central eastern Atlantic Ocean; its usual length is 50 cm (Collette and Nauen 1983;Gushchen and Corten, 2016). During the period of scientific monitoring, the analyzed specimens ranged from 23 to 65 cm in length and from 250 to 3455 g in weight. ...
The hematological parameters of the peripheral blood of the Atlantic chub mackerel Scomber colias, bonito Sarda sarda, and splendid alfonsino Beryx splendens are presented based on materials of scientific monitoring on board the fishing vessels in the exclusive economic zones of Morocco and Mauritania in the years 2004-2017. A larger number of immature erythropoietic cells was recorded in the alfonsino, which is probably due to its possible vertical feeding migrations to greater depths with high pressure and low oxygen content. The analysis of erythropoiesis and the leukocyte formula revealed features of physiological and immunological aspects. Bonito has a higher monocyte content than atlantic chub mackerel and alfonsino, which indicates a high level of innate cellular immunity, represented by phagocytosis.
... Отобранные особи берикса в биоанализе имели размер от 11 до 27 см и массу от 26 до 544 г, что отличается от литературных данных, где отмечены особи достигшие размеров 70 см в Мексиканском заливе, 70 см в Атлантическом, 44 см в Индийском и 50 см в Тихом океанах, обычный размер составляет 40 см (Parin et al., 1995;Lehodey, Grandperrin, 1996;Sommer et al., 1996;Santamaria et al., 2006). Пеламида может достигать длины 61 см в Средиземном море (Campo et al., 2006;Zorica, 2008) и 91 см в Центрально-Восточной Атлантике, обычный размер -50 см (Collette, Nauen 1983;Гущин, Кортен, 2016). Проанализированные экземпляры в период научного мониторинга -от 23 до 65 см; масса тела -от 250 до 3455 г. ...
На основании материалов научного мониторинга на промысловых судах в акватории исключительных экономических зон Марокко и Мавритании в 2004–2017 гг. впервые представлены гематологические параметры периферической крови скумбрии Scomber colias, пеламиды Sarda sarda и берикса Beryx splendens. При описании клеток эритропоэтического ряда отмечен факт большего количества
незрелых клеток у берикса, что, вероятно, связано с его пищевыми вертикальными миграциями на большие глубины с высоким давлением и пониженным содержанием кислорода. Анализ эритропоэза и лейкоцитарной формулы рыб позволил выявить особенности физиологического и иммунологического характера. Так, у пеламиды отмечено более высокое содержание моноцитов, чем у скумбрии и берикса, что свидетельствует о высоком уровне врожденного клеточного иммунитета, представленного фагоцитозом.
... In the Mediterranean, spawning occurs in the Black and Marmara seas as main spawning areas (Yoshida 1980;Rey et al. 1984). The species already received attentions of the researchers and different aspects including its biometry, age, growth, mortality, migration and genetic differentiations have been studied (Demir 1964;Franicevic 2005;Ateş et al. 2008;Zorica and Sinovcic 2008;Cengiz 2013;Kahraman et al. 2014;Turan 2015;Turan et al. 2015Turan et al. , 2016Petukhova 2020) but no one has fully defined its morphometric, meristic and genetic characteristics. ...
The Atlantic bonito (Sarda sarda) is a commercially important and popular species in the world as well as in Turkish fisheries sector. In this study, the morphologic and meristic features and genetic characteristics of Atlantic bonito in the Black Sea were examined. We found that most of the morphometric measurements in females were greater than males. Besides, 10 haplotypes were found for COI gene region, 3 haplotypes for 16s gene region and 4 haplotypes for the rhodopsin gene region. Genetic closure was determined in Tirebolu population for the first time.
... Although Atlantic bonito fisheries have existed for a long time in the Adriatic Sea, and the biology of the species in the area is known, there are still almost no indications of the early life stages and spawning traits of this species. However, the larvae and juveniles of this species were recently documented and genetically determined in the Croatian fishing ground (Zorica & Sinovčić, 2008). Accordingly, there is an obvious need for a profound scientific investigation of the Atlantic bonito spawning cycle within the boundaries of the Adriatic Basin. ...
... The Atlantic bonito fork length range (37.5 < FL < 60.8 cm) during this investigation mainly overlapped throughout the seasons (Table 1), as well as with previously reported fork lengths of S. sarda in the Adriatic Sea. Namely, by analysing 665 specimens, Franičević et al. (2005), observed a fork length range from 33.0 to 67.0 cm in the 1997-2000 period, whereas Zorica & Sinovčić (2008) found FL in the range of 39.3-56.7 cm in 101 specimens in 2007. ...
... Franičević (unpublished data, PhD) established that maximum gonad development was in July-August in the Adriatic Sea. Zorica & Sinovčić (2008), based on macroscopic analyses of adults in the autumn (October), suggested that all analysed individuals were adults in a post-spawning period. Results obtained within this study are consistent with their findings for Atlantic bonito in the Adriatic Sea. ...
Atlantic bonito, Sarda sarda , is one of the representatives of the Scombridae family in the Adriatic Sea. Larvae and juveniles have been found and described in the area, but no information has been published regarding adults spawning in the Adriatic Sea. To explore the strong possibility that Atlantic bonito are reproducing in the Adriatic Sea, 122 specimens of adult Atlantic bonito were collected from a purse seine net ‘palamidara’ over four seasons in 2017. The fork length of the analysed specimens varied from 37.5 to 60.8 cm, with a mean of 48.83 ± 5.59 cm, while total body weight varied between 742.68 and 3102.59 g, with a mean value of 1700.49 ± 543.82 g. Gonadosomatic index values showed an increasing trend from autumn (0.123 for males, 0.897 for females) until spring, while in the summer, they reached their maximum values (3.609 for males, 5.604 for females). This trend was also confirmed by histological and macroscopic analyses of gonads, which suggested that the Atlantic bonito spawning season is in the spring-summer in the Adriatic Sea. Hence, this confirms that this species is spawning in the Adriatic Sea.
... Studies of morphologic variation among populations continue to have an important role to play in stock identification, despite the advent of biochemical and molecular genetic techniques which accumulate neutral genetic differences between groups (Swain & Foote 1999). Some data on the biometric characters of tuna in the Atlantic Ocean and in the Mediterranean Sea due to the interest in their taxonomy are available (Godsil 1954, Hattour 2000, Zorica & Sinovčić 2008). However, the number of papers published on this subject, regarding intra-and interspecific population differences, is still very scarce. ...
Meristic counts and morphometric measurements were carried out on little tuna Euthynnus alletteratus
(Rafinesque 1810) obtained from commercial landings in Tunisian waters (Zarzis, Gabes, Sfax and Teboulbah ) and from two samples of the eastern Atlantic Ocean (central-east Atlantic and south-east Atlantic).
Nine morphometric and five meristic characters were analysed using hierarchical cluster analysis and ultivariate discriminant analysis In discriminant function analysis, the plotting first discriminant functions explained 76.97% and 60.56% of the between-group variation in the morphometric and the meristic analyses, espectively. All the morphometric analyses indicated the existence of four morphologically differentiated groups of little tuna. The greatest differences were found between the samples from the Alantic Ocean and
all the others sampled , while fish from the Tunisian coast appeared to be more similar among themselves .
The meristic characters did not support the morphometric results ,showing a clear similarity between the
SE Atlantic and Teboulbah Sea specimens , with the Mahalanobis distances among areas being an order of agnitude smaller than those for the morphometric analysis
... Some data on the biometric characters of tuna in the Atlantic Ocean and in the Mediterranean Sea due to the interest in their taxonomy are available (Godsil 1954, Hattour 2000, Zorica & Sinovčić 2008. However, the number of papers published on this subject, regarding intra-and interspecific population differences, is still very scarce. ...
Meristic counts and morphometric measurements were carried out on little tuna Euthynnus alletteratus (Rafinesque 1810) obtained from commercial landings in Tunisian waters (Zarzis, Gabes, Sfax and Teboulbah) and from two samples of the eastern Atlantic Ocean (central-east Atlantic and south-east Atlantic). Nine morphometric and five meristic characters were analysed using hierarchical cluster analysis and multivariate discriminant analysis. In discriminant function analysis, the plotting first discriminant functions explained 76.97% and 60.56% of the between-group variation in the morphometric and the meristic analyses, respectively. All the morphometric analyses indicated the existence of four morphologically differentiated groups of little tuna. The greatest differences were found between the samples from the Atlantic Ocean and all the others sampled, while fish from the Tunisian coast appeared to be more similar among themselves. The meristic characters did not support the morphometric results, showing a clear similarity between the SE Atlantic and Teboulbah Sea specimens, with the Mahalanobis distances among areas being an order of magnitude smaller than those for the morphometric analysis.
... During the present study, the b values were generally in agreement with the former results. The allometric coefficient of bonito given by Zorica and Sinovčić (2008) for the Adriatic Sea is smaller than that obtained in the present study. This might be due to differences in the sampling periods and to variations in the food availability or water temperatures between the basins. ...
Length-weight relationships (LWRs) of 16,842 specimens of fish caught in the Bulgarian Black Sea waters,
covering 9 families, 10 genera, and 10 species, were studied. Spiny dogfish (Squalus acanthias L.), thornback ray (Raja clavata L.), sprat (Sprattus sprattus L.), pontic shad (Alosa immaculata Eichwald), anchovy (Engraulis encrasicolus L.), whiting (Merlangius merlangus euxinus Pallas), horse mackerel (Trachurus mediterraneus Aleev), bonito (Sarda sarda Bloch), round goby (Neogobius melanostomus Pallas), and turbot (Psetta maxima L.) were collected from May 2006 to December 2008. The fishes were caught by different fishing techniques, such as gill net, trawl net, and trap nets. The slope or allometric coefficient (b) of the functional regression between length and weight values varied from between 2.302 and
3.839 with the mean b = 3.152. The LWRs for S. acanthias and R. clavata have been reported for the first time for the Bulgarian Black Sea waters.
