المؤلفون: James, Kelsey C.¹ (AUTHOR) kelsey.james@noaa.gov, Dorval, Emmanis^1,2 (AUTHOR), Erisman, Brad E.¹ (AUTHOR)

المصدر: Marine Biology. May2024, Vol. 171 Issue 5, p1-13. 13p.

مصطلحات موضوعية: *SARDINES, *OTOLITHS, *OXYTETRACYCLINE, *CAPTIVITY, *OCEAN, *TEMPERATURE

مصطلحات جغرافية: MEXICO

مستخلص: Pacific Sardine (Sardinops sagax) in the Northeast Pacific Ocean are aged for stock assessments assuming the formation of two otolith growth bands (one opaque and one translucent) a year, but the periodicity of band formation has not been fully validated. To validate our ageing method, we investigated the periodicity of band deposition and somatic and otolith growth rate across a range of temperatures. Live Pacific Sardine (mostly age 0) were collected, marked with oxytetracycline (OTC), and raised in captivity at different temperatures (13 °C, 15 °C, 17 °C, and 21 °C) for up to one year. There was no clear pattern between temperature and somatic growth rate. Otolith growth rate was slower for Pacific Sardine in captivity at 13 °C than at 17 °C. All individuals that were in captivity for one year (n = 21) deposited 2–3 growth bands distal to the OTC mark. Therefore, Pacific Sardine deposited bands in their otoliths at the rate expected for the formation of annuli across ecologically relevant temperatures (13–21 °C) in captivity. Vateritic otoliths were rare but did display an OTC mark at approximately the same distance from the otolith edge as the aragonitic otolith in the pair. The results of this study build upon previous validation research for Pacific Sardine and support the ageing methodology used for this species by all ageing laboratories in the US, Canada, and Mexico. [ABSTRACT FROM AUTHOR]

المؤلفون: Zwolinski, Juan P.¹ (AUTHOR) juan.zwolinski@noaa.gov, Demer, David A.² (AUTHOR)

المصدر: Fisheries Oceanography. May2024, Vol. 33 Issue 3, p1-14. 14p.

مصطلحات موضوعية: *SARDINES, *FISHERIES, *HABITATS

مصطلحات جغرافية: SOUTHERN California, MEXICO

مستخلص: Three years after the 2015 collapse of the northern stock of Pacific Sardine that is predominantly located off the west coast of the United States, acoustic‐trawl (A‐T) surveys documented an increase in the presence and persistence of the southern stock off coastal Southern California. Then in 2020, the biomass of Sardine that was landed in Mexico and attributed to the northern stock exceeded the estimated biomass for the entire northern stock. To investigate if the landings were incorrectly classified, we revisit a model of northern‐stock potential habitat and the associated range of sea‐surface temperature (SST) used to apportion the A‐T survey data and monthly fishery landings to the two stocks, respectively. We update the probabilistic model of potential habitat with data on sardine‐egg presence and absence and concomitant satellite‐sensed SST and chlorophyll‐a concentration through 2019 and apply the new model to more accurately attribute the A‐T observations and fishery landings data to the northern or southern stock. The addition of recent data, with increased coverage in SSTs between 15°C and 17°C, improves the model accuracy and spatial precision of the stock attribution. The attribution accuracy is critically dependent on the temporal and spatial coincidence of the environmental and survey or landings data and should be corroborated with other characteristics indicative of biological isolation such as spatial separation, distinct spawning areas and seasons, and uncorrelated demographics. [ABSTRACT FROM AUTHOR]

المؤلفون: Calvo, Gabriel¹ (AUTHOR) gabriel.calvo@uv.es, Armero, Carmen¹ (AUTHOR), Spezia, Luigi² (AUTHOR), Pennino, Maria Grazia³ (AUTHOR)

المصدر: Stochastic Environmental Research & Risk Assessment. Apr2024, Vol. 38 Issue 4, p1635-1646. 12p.

مصطلحات موضوعية: *SARDINES, *SMALL-scale fisheries, *TIME series analysis, *AUTOREGRESSIVE models, *PELAGIC fishes

مستخلص: The European sardine is a pelagic species of great ecological importance for the conservation of the Mediterranean Sea as well as economic importance for the Mediterranean countries. Its fishing has suffered a significant decline in recent years due to various economic, cultural and ecological reasons. This paper focuses on the evolution of sardine catches in the Mediterranean Sea from 1985 to 2018 according to the fishing Mediterranean country and the type of fishing practised, artisanal and industrial. We propose three Bayesian longitudinal linear mixed models to assess differences in the temporal evolution of artisanal and industrial fisheries between and within countries. Overall results confirm that Mediterranean fishery time series are highly diverse along their dynamics and this heterogeneity is persistent throughout the time. Furthermore, our results highlight a positive correlation between artisanal and industrial fishing. Finally, the study observes a consistent decreasing time trend in the quantity of fish landings. Although the causes of this feature could be also linked to economic motivations (such as a reduction in demand or the reorientation of fleets towards more commercially beneficial species), it may indicate a potential risk to the stock of this species in the Mediterranean Sea. [ABSTRACT FROM AUTHOR]

المؤلفون: Adams, Ella S.^1,2 (AUTHOR) ellaadams0@gmail.com, Craig, Matthew T.¹ (AUTHOR)

المصدر: Bulletin of the Southern California Academy of Sciences. Apr2024, Vol. 123 Issue 1, p10-24. 15p.

مصطلحات موضوعية: *SARDINES, *CYTOCHROME b, *PHYLOGEOGRAPHY, *FISHERIES, *NULL hypothesis, *GEOGRAPHY, *NO-tillage

مصطلحات جغرافية: BAJA California (Mexico : State), VANCOUVER Island (B.C.), GULF of California (Mexico)

مستخلص: The Pacific sardine, (Sardinops sagax), is a small, coastal pelagic species in the family Clupeidae. Sardine are ecologically important forage for many animals, and have historically supported a large commercial fishery. To expand on previous evolutionary genetic studies of population structure and to test if population structure is present in Pacific sardine was reflective of long-term processes, 434 individuals were examined ranging from Vancouver Island, British Columbia to Bahía Magdalena, Baja California, and from the Gulf of California. A 1062 bp fragment of the cytochrome b gene yielded small but significant fixation estimates of ΦST (0.01136, p = 0.032). Concordantly low fixation was observed for two ΦCT groupings (0.00435, p = 0.128 and 0.00923, p = 0.021). These data support the null hypothesis of an absence of genetic structure in the Pacific sardine. [ABSTRACT FROM AUTHOR]

المؤلفون: da Fonseca, Rute R.^1,2 (AUTHOR) campos.f.paula@gmail.com, Campos, Paula F.^2,3 (AUTHOR) mnande@ciimar.up.pt, Rey-Iglesia, Alba⁴ (AUTHOR) ardelaiglesia@sund.ku.dk, Barroso, Gustavo V.⁵ (AUTHOR) gvbarroso@gmail.com, Bergeron, Lucie A.⁶ (AUTHOR) lucie.a.bergeron@gmail.com, Nande, Manuel³ (AUTHOR) r.macieiradefaria@sheffield.ac.uk, Tuya, Fernando⁷ (AUTHOR) ftuya@yahoo.es, Abidli, Sami⁸ (AUTHOR) abidli_sami@yahoo.fr, Pérez, Montse⁹ (AUTHOR) montse.perez@ieo.csic.es, Riveiro, Isabel⁹ (AUTHOR) isabel.riveiro@ieo.csic.es, Carrera, Pablo⁹ (AUTHOR) pablo.carrera@ieo.csic.es, Jurado-Ruzafa, Alba¹⁰ (AUTHOR) alba.jurado@ieo.csic.es, G. Santamaría, M. Teresa¹⁰ (AUTHOR) mtgarsantamaria@gmail.com, Faria, Rui³ (AUTHOR) andre.machado@ciimar.up.pt, Machado, André M.³ (AUTHOR) mig.m.fonseca@gmail.com, Fonseca, Miguel M.³ (AUTHOR) elsafroufe@gmail.com, Froufe, Elsa³ (AUTHOR), C. Castro, L. Filipe^3,11 (AUTHOR) rfonseca@sund.ku.dk

المصدر: Genes. Feb2024, Vol. 15 Issue 2, p170. 15p.

مصطلحات موضوعية: *SARDINES, *OTOLITHS, *SUSTAINABLE fisheries, *GENOMICS, *INNER ear, *SPECIES distribution

مصطلحات جغرافية: AZORES, IBERIAN Peninsula

مستخلص: The European sardine (Sardina pilchardus, Walbaum 1792) is indisputably a commercially important species. Previous studies using uneven sampling or a limited number of makers have presented sometimes conflicting evidence of the genetic structure of S. pilchardus populations. Here, we show that whole genome data from 108 individuals from 16 sampling areas across 5000 km of the species' distribution range (from the Eastern Mediterranean to the archipelago of Azores) support at least three genetic clusters. One includes individuals from Azores and Madeira, with evidence of substructure separating these two archipelagos in the Atlantic. Another cluster broadly corresponds to the center of the distribution, including the sampling sites around Iberia, separated by the Almeria–Oran front from the third cluster that includes all of the Mediterranean samples, except those from the Alboran Sea. Individuals from the Canary Islands appear to belong to the Mediterranean cluster. This suggests at least two important geographical barriers to gene flow, even though these do not seem complete, with many individuals from around Iberia and the Mediterranean showing some patterns compatible with admixture with other genetic clusters. Genomic regions corresponding to the top outliers of genetic differentiation are located in areas of low recombination indicative that genetic architecture also has a role in shaping population structure. These regions include genes related to otolith formation, a calcium carbonate structure in the inner ear previously used to distinguish S. pilchardus populations. Our results provide a baseline for further characterization of physical and genetic barriers that divide European sardine populations, and information for transnational stock management of this highly exploited species towards sustainable fisheries. [ABSTRACT FROM AUTHOR]

المؤلفون: Giarni, Reni¹ (AUTHOR) reni003@brin.go.id, Laily, Noer² (AUTHOR), Wijayanti, Sri Peni³ (AUTHOR), Rachman, Dicki¹ (AUTHOR), Muhamaludin¹ (AUTHOR), Astin, Eko Pratama¹ (AUTHOR), Widodo, Wahju Eko¹ (AUTHOR), Nafsiah, Sari¹ (AUTHOR)

المصدر: AIP Conference Proceedings. 2024, Vol. 2957 Issue 1, p1-9. 9p.

مصطلحات موضوعية: *SARDINES, *PROTEIN hydrolysates, *BLASTING, *ENZYMES, *FISHERY processing

مستخلص: The abundance of sardines and the high protein content of this fish is a great opportunity to be processed into fish protein hydrolysate. The purpose of this study was to optimize hydrolysate of sardines. Fish hydrolysates was prepared using steam blasting method, at a pressure of 2 bar with time variation 10, 15 and 20 minutes. Hydrolysis was continued enzymatically using bromelain enzyme for 2 hours at 60°C. Chemical and physical characterization was carried out to determine protein digestibility, dissolved protein, protein molecular weight, proximate value, color, and odor of fish protein hydrolysate. The results showed that the time of steam blasting had no significant (p>0.05) effect on protein digestibility, significant effect (p<0.05) on dissolved protein, and significant effect (p<0.05) on proximate analysis of sardine hydrolyzate in general. Under these process conditions, the molecular weight of the sardine fish hydrolysate is about 10 kD. The odor smells fishy, and the color was brownish-yellow. [ABSTRACT FROM AUTHOR]

المؤلفون: Cengiz, Özgür¹ ozgurcengiz17@gmail.com, Özekinci, Uğur², Öztakın, Alkan²

المصدر: Momona Ethiopian Journal of Science. 2024, Vol. 16 Issue 1, p51-59. 9p.

مصطلحات موضوعية: *SARDINES, *FISHERIES, *COASTS, *FISHERY management

مصطلحات جغرافية: TURKEY

مستخلص: The European pilchard (Sardina pilchardus Walbaum, 1792) is one of the main target species of commercial fishery along the Aegean coasts. This work was carried out between July 2014 and June 2015 off Saros Bay (North Aegean Sea, Turkey). The study focuses on determining the reproductive period of the species. The elevated GSI values suggested the spawning period occurred mainly between September and May with a peak in February. [ABSTRACT FROM AUTHOR]

المؤلفون: Taskaya, Aylin¹ (AUTHOR), Ozturk-Kerimoglu, Burcu² (AUTHOR), Serdaroglu, Meltem² (AUTHOR) meltem.serdaroglu@ege.edu.tr

المصدر: Journal of Aquatic Food Product Technology. 2024, Vol. 33 Issue 1, p19-32. 14p.

مصطلحات موضوعية: *PLUM, *SARDINES, *ANTIOXIDANTS, *EXTRACTS

مستخلص: The potential usage of plum extract (PE) in minced sardine systems as a natural antioxidant was studied. Methanol-extracted PE indicated the highest antioxidant activity and was used (1%, 2%, 3%) in minced fish treatments. PE did not cause significant changes in chemical composition, while it decreased pH values. Redness and yellowness were not affected, although lightness decreased with increasing levels of PE. The extract was effective to retard oxidation by decreasing free fatty acids, peroxide, and malondialdehyde concentrations during frozen storage. Consequently, PE could be used up to 3% as a natural source in fish mince. [ABSTRACT FROM AUTHOR]

المؤلفون: Shibuya, Akemi¹ (AUTHOR) ashibuya.1@gmail.com, Duncan, Wallice P.¹ (AUTHOR), Zuanon, Jansen² (AUTHOR)

المصدر: Ichthyological Research. Jan2024, Vol. 71 Issue 1, p208-211. 4p.

مصطلحات موضوعية: *CHARACIFORMES, *SARDINES, *SCIENTIFIC literature, *HYPERPIGMENTATION, *THREESPINE stickleback, *FISH morphology, *FISH anatomy

مستخلص: This article reports on a rare case of abnormal hyperpigmentation in a freshwater sardine species, Triportheus auritus, from the Amazon basin in Brazil. Hyperpigmentation, characterized by excessive pigmentation in the skin or other tissues, has been observed in various fish species. However, this is the first documented case of hypermelanosis in Amazonian freshwater fishes. The specimen was collected from the Tefé River and showed hyperpigmentation on the scales and skin of the head. The rarity of this abnormality suggests that it may be an individual abnormality rather than a common occurrence in the population. The article provides detailed morphometric data and histological analysis of the specimen. The authors speculate that the survival of the hypermelanic individual may be facilitated by the aquatic lighting conditions of the black water in the Tefé River. [Extracted from the article]

المؤلفون: Hata, Harutaka¹ (AUTHOR) k2795502@kadai.jp

المصدر: Ichthyological Research. Jan2024, Vol. 71 Issue 1, p154-162. 9p.

مصطلحات موضوعية: *SARDINES, *RAINBOWS, *SPECIES, *TEETH, *GILLS, *PTERYGOID muscles

مصطلحات جغرافية: FIJI

مستخلص: Dussumieria chimaera sp. nov., is described from 15 specimens collected from Fiji. The new species is similar to Dussumieria acuta Valenciennes 1847, Dussumieria albulina (Fowler 1934), and Dussumieria torpedo Hata, Lavoué and Motomura 2021 in having a deep body, and to Dussumieria elopsoides Bleeker 1849, Dussumieria hasseltii Bleeker 1851, and Dussumieria productissima Chabanaud 1933 in having the body scales without striae posteriorly. However, Dussumieria chimaera is differentiated from the other species by a unique configuration of teeth on the mouth roof (one or two rows of conical teeth on each palatine, and small conical teeth distributed sparsely on the pterygoids), and the combination of a deep body, body scales without striae posteriorly, and medium gill raker numbers. [ABSTRACT FROM AUTHOR]