P. Sonon, Rachad Sidi Imorou, Nambil Adjibade, Hamidou Arame, A. Adite
Dormitator lebretonis (Pisces: Eleotridae) is the dominant eleotrid in the Benin coastal waters, where this species constitutes an important fisheries component. The current fisheries survey investigates demographic parameters and the exploitation of D. lebretonis from the Benin coastal waters to contribute to species conservation and sustainable use. Individuals of D. lebretonis have been sampled monthly for 18 months at four locations in the Benin coastal waters. Overall, D. lebretonis showed moderate asymptotic length (L∞) ranging between 11.55-12.08 cm. The growth rate (K) ranged between 0.74yr-1 and 3.1yr-1. The species exhibited moderate longevity ranging between 0.968 and 4.054 years. The growth performance index (φ’) varied between 1.994-2.617, indicating that D. lebretonis is a relatively slow-growing eleotrid. Annual mortalities dominate population growth (Z/K>1), and lengths at first capture (3.80≤L50≤5.05cm) indicated that D. lebretonis was exploited at immature stages. Nevertheless, the exploitation rate (E) was under 0.5, showing the stock was underexploited. The species showed two peaks of recruitment, except in Lake Ahémé. Sustainable exploitation of D. lebretonis in the coastal waters requires a holistic management scheme that should include fisheries regulation enforcement, spawning ground protection, ecosystem restoration, and follow-up.
{"title":"Demographic characteristics and exploitation rate of Dormitator lebretonis (Pisces: Eleotridae: Steindachner, 1870) from four coastal lagoons of Southern Benin, West Africa","authors":"P. Sonon, Rachad Sidi Imorou, Nambil Adjibade, Hamidou Arame, A. Adite","doi":"10.3153/ar23010","DOIUrl":"https://doi.org/10.3153/ar23010","url":null,"abstract":"Dormitator lebretonis (Pisces: Eleotridae) is the dominant eleotrid in the Benin coastal waters, where this species constitutes an important fisheries component. The current fisheries survey investigates demographic parameters and the exploitation of D. lebretonis from the Benin coastal waters to contribute to species conservation and sustainable use. Individuals of D. lebretonis have been sampled monthly for 18 months at four locations in the Benin coastal waters. Overall, D. lebretonis showed moderate asymptotic length (L∞) ranging between 11.55-12.08 cm. The growth rate (K) ranged between 0.74yr-1 and 3.1yr-1. The species exhibited moderate longevity ranging between 0.968 and 4.054 years. The growth performance index (φ’) varied between 1.994-2.617, indicating that D. lebretonis is a relatively slow-growing eleotrid. Annual mortalities dominate population growth (Z/K>1), and lengths at first capture (3.80≤L50≤5.05cm) indicated that D. lebretonis was exploited at immature stages. Nevertheless, the exploitation rate (E) was under 0.5, showing the stock was underexploited. The species showed two peaks of recruitment, except in Lake Ahémé. Sustainable exploitation of D. lebretonis in the coastal waters requires a holistic management scheme that should include fisheries regulation enforcement, spawning ground protection, ecosystem restoration, and follow-up.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74833136","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study aims to deter-mine the fatty acid profile of 10 fish species (Carassius gibelio (Bloch, 1782), Chondrostoma regi-um (Heckel, 1843), Cyprinus carpio (Linnaeus, 1758), Carassius auratus (Linnae-us, 1758), Alburnus sellal (Heckel, 1843), Planiliza abu (Heckel, 1843), Capoeta trutta (Heckel, 1843), Arabibarbus grypus (Heck-el, 1843), Mastacembelus mastacembelus (Banks & Solander 1794) ) caught from Atatürk Dam Lake, sold by fishermen and con-sumed by local people. Ac-cordingly, the fish species identification was made and the individuals belonging to the determined species were randomly selected and mus-cle tissue was taken from each sample for fatty acid analysis and put into tubes. Extraction of fats from muscle tissue was carried out using a chloroform-methanol solvent mixture. The methylation process of fatty acids was carried out using the TS EN ISO 12966:2 method. Analyzes were performed with Ther-mo brand Trace GC model GC with FID (Flame Ion De-tector) detector. A 60 m HP-88 column was used in the analysis. It has been deter-mined that 10 fish species contain a total of 26 differ-ent fatty acids. Palmitic acid is the major fatty acid among saturated fatty acids (SFA). Palmitic acid values vary between 18.31 % and 25.51 %. It was determined the most in C. carpio and the lowest in C. auratus. Among the mono unsaturat-ed fatty acids (MUFA), ole-ic acid is the major fatty ac-id and was found between 12.70 % and 29.77 %. It was detected at most in A. sellal with a rate of 29.77 % and in P. abu with a minimum rate of 12.70 %. Of the pol-yunsaturated fatty acids (PUFA), docosahexaenoic acid is seen as the major fat-ty acid. It was detected at most in C. trutta with a rate of 14.24 %, and at a mini-mum in C. carpio with a rate of 0.62 %.
本研究旨在测定渔民出售和当地居民食用的10种鱼类(Carassius gibelio (Bloch, 1782)、Chondrostoma regium (Heckel, 1843)、Cyprinus carpio (Linnaeus, 1758)、carprinus auratus (Linnaeus, 1758)、Alburnus sellal (Heckel, 1843)、Planiliza abu (Heckel, 1843)、Capoeta trutta (Heckel, 1843)、Arabibarbus grypus (Heck-el, 1843)、Mastacembelus Mastacembelus (Banks & Solander, 1794))的脂肪酸谱。据此，进行鱼种鉴定，随机选取属于所确定鱼种的个体，从每个样本中取出肌环组织进行脂肪酸分析，并放入管中。使用氯仿-甲醇溶剂混合物从肌肉组织中提取脂肪。脂肪酸的甲基化过程采用TS EN ISO 12966:2方法进行。分析采用thero -mo品牌痕量气相色谱模型，气相色谱带FID(火焰离子检测器)检测器。采用60 m HP-88色谱柱进行分析。已经确定，10种鱼类总共含有26种不同的脂肪酸。棕榈酸是饱和脂肪酸(SFA)中的主要脂肪酸。棕榈酸值在18.31%到25.51%之间变化。以鲫鱼最多，鲫鱼最少。在单不饱和脂肪酸(MUFA)中，酸是主要的脂肪酸，含量在12.70% ~ 29.77%之间。其中，在沙蠓的检出率最高，为29.77%，在阿布蠓的检出率最低，为12.70%。在多元不饱和脂肪酸(PUFA)中，二十二碳六烯酸被认为是主要的脂肪酸。其中，特鲁菌检出率最高，为14.24%;卡皮菌检出率最低，为0.62%。
{"title":"Investigation of fatty acid profiles in some economically important fish species living in Atatürk Dam Lake, Adıyaman, Türkiye","authors":"Y. Yakar, A. Parmaksız, Y. Dörtbudak, N. Doğan","doi":"10.3153/ar23002","DOIUrl":"https://doi.org/10.3153/ar23002","url":null,"abstract":"This study aims to deter-mine the fatty acid profile of 10 fish species (Carassius gibelio (Bloch, 1782), Chondrostoma regi-um (Heckel, 1843), Cyprinus carpio (Linnaeus, 1758), Carassius auratus (Linnae-us, 1758), Alburnus sellal (Heckel, 1843), Planiliza abu (Heckel, 1843), Capoeta trutta (Heckel, 1843), Arabibarbus grypus (Heck-el, 1843), Mastacembelus mastacembelus (Banks & Solander 1794) ) caught from Atatürk Dam Lake, sold by fishermen and con-sumed by local people. Ac-cordingly, the fish species identification was made and the individuals belonging to the determined species were randomly selected and mus-cle tissue was taken from each sample for fatty acid analysis and put into tubes. Extraction of fats from muscle tissue was carried out using a chloroform-methanol solvent mixture. The methylation process of fatty acids was carried out using the TS EN ISO 12966:2 method. Analyzes were performed with Ther-mo brand Trace GC model GC with FID (Flame Ion De-tector) detector. A 60 m HP-88 column was used in the analysis. It has been deter-mined that 10 fish species contain a total of 26 differ-ent fatty acids. Palmitic acid is the major fatty acid among saturated fatty acids (SFA). Palmitic acid values vary between 18.31 % and 25.51 %. It was determined the most in C. carpio and the lowest in C. auratus. Among the mono unsaturat-ed fatty acids (MUFA), ole-ic acid is the major fatty ac-id and was found between 12.70 % and 29.77 %. It was detected at most in A. sellal with a rate of 29.77 % and in P. abu with a minimum rate of 12.70 %. Of the pol-yunsaturated fatty acids (PUFA), docosahexaenoic acid is seen as the major fat-ty acid. It was detected at most in C. trutta with a rate of 14.24 %, and at a mini-mum in C. carpio with a rate of 0.62 %.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85448593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study investigated the potential for eutrophication in Köyceğiz Lake, one of Türkiye's most important and sensitive ecosystems. We developed a simple steady-state eutrophication model system using a phosphorus mass balance model for the lake, utilising open-access data from the literature as input. The model was calibrated and validated, with a specific focus on the eutrophic state of Köyceğiz Lake, and it demonstrated good responsiveness to future predictions. Our findings revealed that both the epilimnion (TSI (TP) 56) and hypolimnion (TSI (TP) 70) of Köyceğiz Lake are eutrophic. Considering climate change impacts and developments in the basin, we conducted projections to determine the lake's trophic status between 2035 and 2095. By 2035, a 65% decrease in freshwater inflow and a 4% increase in total TP load will lead to a hypertrophic status, which will persist and gradually worsen to a severe trophic situation by 2095.
{"title":"Assessing eutrophication vulnerability in Köyceğiz Lake: Climate change and basin developments impact trophic status","authors":"Elif Atasoy Aytış, E. Soyer, A. Ertürk","doi":"10.3153/ar23020","DOIUrl":"https://doi.org/10.3153/ar23020","url":null,"abstract":"This study investigated the potential for eutrophication in Köyceğiz Lake, one of Türkiye's most important and sensitive ecosystems. We developed a simple steady-state eutrophication model system using a phosphorus mass balance model for the lake, utilising open-access data from the literature as input. The model was calibrated and validated, with a specific focus on the eutrophic state of Köyceğiz Lake, and it demonstrated good responsiveness to future predictions. Our findings revealed that both the epilimnion (TSI (TP) 56) and hypolimnion (TSI (TP) 70) of Köyceğiz Lake are eutrophic. Considering climate change impacts and developments in the basin, we conducted projections to determine the lake's trophic status between 2035 and 2095. By 2035, a 65% decrease in freshwater inflow and a 4% increase in total TP load will lead to a hypertrophic status, which will persist and gradually worsen to a severe trophic situation by 2095.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88091093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Three specimens of A. filamentosus were captured by recreational anglers off Sığacık Bay, Izmir, at a depth of 220 m on 22 March 2023. The total length of these specimens was between 255 and 310 mm. Thus, the certain record number has reached at least twenty specimens in the Turkish seas. This paper presents the fifth confirmed record of A. filamentosus from the southeastern Aegean Sea. Though the sporadic occurrences of this species in the Aegean Sea do not indicate an established population for the time being, it signs that it is becoming abundant.
{"title":"Occurrence of Aulopus filamentosus (Bloch, 1792) (Aulopidae) in the Turkish Aegean Sea (Sığacık Bay, E. Mediterranean)","authors":"O. Akyol","doi":"10.3153/ar23021","DOIUrl":"https://doi.org/10.3153/ar23021","url":null,"abstract":"Three specimens of A. filamentosus were captured by recreational anglers off Sığacık Bay, Izmir, at a depth of 220 m on 22 March 2023. The total length of these specimens was between 255 and 310 mm. Thus, the certain record number has reached at least twenty specimens in the Turkish seas. This paper presents the fifth confirmed record of A. filamentosus from the southeastern Aegean Sea. Though the sporadic occurrences of this species in the Aegean Sea do not indicate an established population for the time being, it signs that it is becoming abundant.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91091028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study is to be the first report and new host record of segmented worms in the family Piscicolidae, Trachelobdella lubrica parasitizing Sparus aurata off the coasts of Algeria. Sparus aurata constitutes new host record for Trachelobdella lubrica. 05 specimens of Sparus aurata were examined for their leech parasites. A single specimen of leech species was recovered from the gills of Sparus aurata. Typical characters allowed us to classify the leech as Trachelobdella lubrica.
{"title":"The first report and a new host record of leech fish, Trachelobdella lubrica (Grube, 1840) infecting the gills of Sparus aurata (Linnaeus, 1758) from the Gulf of Bejaia, Algeria","authors":"Souhila Ramdani","doi":"10.3153/ar23026","DOIUrl":"https://doi.org/10.3153/ar23026","url":null,"abstract":"This study is to be the first report and new host record of segmented worms in the family Piscicolidae, Trachelobdella lubrica parasitizing Sparus aurata off the coasts of Algeria. Sparus aurata constitutes new host record for Trachelobdella lubrica. 05 specimens of Sparus aurata were examined for their leech parasites. A single specimen of leech species was recovered from the gills of Sparus aurata. Typical characters allowed us to classify the leech as Trachelobdella lubrica.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136260028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Phytoplankton communities of Dibru Saikhowa Biosphere Reserve (DSBR) beels were studied from October 2013 to September 2015 in two floodplain lakes (beels), namely Maghuri beel and No.11 beel in Tinsukia district, upper Assam, Northeast India. Phytoplankton reveal a richness of (61 species) belonging to five groups: Chlorophyta (35 species) > Bacillariophyta (13 species) > Euglenophyta (7 species) > Cyanophyta (5 species) > Dinophyta (1). The monthly phytoplankton richness indicated 13–32 (25 ±6) species) and 21–39 (30 ±5) and with distinct species importance of Chlorophyta (5-17) 12 ±4 and (10-24) 15 ±3 species in Maghuri beel and No.11 beel respectively. Phytoplankton abundance ranged between 162 ±157 n/L and 138 ±39 n/L and comprised a sub-dominant component of net plankton, i.e., between 39.7 ±15.8% and 41.0 ±9.9% in Maghuri beel and No.11 beel respectively. Seventeen abiotic factors recorded relatively limited influence on the phytoplankton richness and abundance of the sampled bells. The canonical correspondence analysis asserted higher cumulative influence along the first two axes of 17 abiotic factors on phytoplankton assemblages of Maghuri beel (76.46%) than in No.11 beel (61.73%) beels.
{"title":"Phytoplankton communities of two floodplain lakes of the Dibru Saikhowa biosphere reserve, Tinsukia, Assam (Northeast India): Ecology, richness, and abundance","authors":"Nogen Noroh, Kensibo Pamai, Mrinal Hatimuria","doi":"10.3153/ar23025","DOIUrl":"https://doi.org/10.3153/ar23025","url":null,"abstract":"Phytoplankton communities of Dibru Saikhowa Biosphere Reserve (DSBR) beels were studied from October 2013 to September 2015 in two floodplain lakes (beels), namely Maghuri beel and No.11 beel in Tinsukia district, upper Assam, Northeast India. Phytoplankton reveal a richness of (61 species) belonging to five groups: Chlorophyta (35 species) > Bacillariophyta (13 species) > Euglenophyta (7 species) > Cyanophyta (5 species) > Dinophyta (1). The monthly phytoplankton richness indicated 13–32 (25 ±6) species) and 21–39 (30 ±5) and with distinct species importance of Chlorophyta (5-17) 12 ±4 and (10-24) 15 ±3 species in Maghuri beel and No.11 beel respectively. Phytoplankton abundance ranged between 162 ±157 n/L and 138 ±39 n/L and comprised a sub-dominant component of net plankton, i.e., between 39.7 ±15.8% and 41.0 ±9.9% in Maghuri beel and No.11 beel respectively. Seventeen abiotic factors recorded relatively limited influence on the phytoplankton richness and abundance of the sampled bells. The canonical correspondence analysis asserted higher cumulative influence along the first two axes of 17 abiotic factors on phytoplankton assemblages of Maghuri beel (76.46%) than in No.11 beel (61.73%) beels.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136260038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Marine finfish culture is a priority area for future human food security. Although many marine finfish species have been domesticated and successful breeding and spawning in captive conditions are achieved, the larval rearing from hatchling to fingerling stage to the desired level is yet to be achieved. One of the essential impediment factors in this process is the availability of suitable live feed for the finfish larvae. The traditional live feeds (Artemia nauplii and rotifers) must be more adequate in size spectrum and nutritive value to many marine finfish larvae. In nature, copepod nauplii, copepodite stages, and adults constitute the preferred food of marine finfish larvae. Copepod size spectrum, nutritive value and swimming movements make them ideal live prey items for fish larvae. Nevertheless, the high-density culture of copepods is challenging due to their sexual reproduction and high species-specific variability. Further, adequate knowledge of the candidate species' food and feeding habits, reproductive biology, and life cycle strategies should exist. With this objective present study describes the female and male reproductive system, oogenesis and spermatogenesis, egg production, and reproductive potential of a candidate calanoid copepod species, Centropages furcatus. This basic information will help develop mass culture protocol for this species.
{"title":"Anatomy and histological evaluation of the reproductive system of marine calanoid copepod Centropages furcatus from a mass culture perspective","authors":"M. Asrar Sheriff, Vijayaraj Radha, Kareem Altaff","doi":"10.3153/ar23022","DOIUrl":"https://doi.org/10.3153/ar23022","url":null,"abstract":"Marine finfish culture is a priority area for future human food security. Although many marine finfish species have been domesticated and successful breeding and spawning in captive conditions are achieved, the larval rearing from hatchling to fingerling stage to the desired level is yet to be achieved. One of the essential impediment factors in this process is the availability of suitable live feed for the finfish larvae. The traditional live feeds (Artemia nauplii and rotifers) must be more adequate in size spectrum and nutritive value to many marine finfish larvae. In nature, copepod nauplii, copepodite stages, and adults constitute the preferred food of marine finfish larvae. Copepod size spectrum, nutritive value and swimming movements make them ideal live prey items for fish larvae. Nevertheless, the high-density culture of copepods is challenging due to their sexual reproduction and high species-specific variability. Further, adequate knowledge of the candidate species' food and feeding habits, reproductive biology, and life cycle strategies should exist. With this objective present study describes the female and male reproductive system, oogenesis and spermatogenesis, egg production, and reproductive potential of a candidate calanoid copepod species, Centropages furcatus. This basic information will help develop mass culture protocol for this species.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136259886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Arabibarbus grypus (Heckel, 1843), which naturally lives in the Euphrates and Tigris River systems and is endemic, is an economically important fish species consumed by humans. Since the population of this species, which is hunted by both fishermen and local peo-ple, is decreasing day by day, its genetic characteristics need to be determined. This study aims to determine the genetic characteristics of A. grypus samples living in Great Zab based on sequence analysis of mtDNA cyt b and mtDNA d loop gene regions. Total DNA isolation was performed from muscle tissue using the kit. Then, Polymerase Chain Reac-tion was applied through spe-cific primers to mtDNA cyt b and mtDNA d loop gene re-gions, and the target regions were amplified. The products with the target length were sent to the commercial firm and sequence analysis was per-formed. Regarding these spec-imens living in Great Zab, two haplotypes were determined for the mtDNA cyt b gene re-gion and five haplotypes for the mtDNA d loop gene re-gion. These haplotypes were compared with the haplotypes in the gene bank and the re-sults were evaluated. Some important data has been ob-tained regarding the conserva-tion and management of this fish species. Since three new haplotypes were detected for the d loop region in this stud-ied locality, it is important to include the samples in this lo-cality in conservation studies.
{"title":"Mitochondrial DNA sequence analysis of Arabibarbus grypus (Heckel, 1843) living in Great Zab (Erbil, Iraq)","authors":"A. Parmaksız","doi":"10.3153/ar23003","DOIUrl":"https://doi.org/10.3153/ar23003","url":null,"abstract":"Arabibarbus grypus (Heckel, 1843), which naturally lives in the Euphrates and Tigris River systems and is endemic, is an economically important fish species consumed by humans. Since the population of this species, which is hunted by both fishermen and local peo-ple, is decreasing day by day, its genetic characteristics need to be determined. This study aims to determine the genetic characteristics of A. grypus samples living in Great Zab based on sequence analysis of mtDNA cyt b and mtDNA d loop gene regions. Total DNA isolation was performed from muscle tissue using the kit. Then, Polymerase Chain Reac-tion was applied through spe-cific primers to mtDNA cyt b and mtDNA d loop gene re-gions, and the target regions were amplified. The products with the target length were sent to the commercial firm and sequence analysis was per-formed. Regarding these spec-imens living in Great Zab, two haplotypes were determined for the mtDNA cyt b gene re-gion and five haplotypes for the mtDNA d loop gene re-gion. These haplotypes were compared with the haplotypes in the gene bank and the re-sults were evaluated. Some important data has been ob-tained regarding the conserva-tion and management of this fish species. Since three new haplotypes were detected for the d loop region in this stud-ied locality, it is important to include the samples in this lo-cality in conservation studies.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81217915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study investigated the effects of dietary supplementation of combined black cumin (BC) and grape seed (GS) powder at different rates (0%, 1%, 2%, and 4%, respectively) on growth performance and hepatopancreas histology of third instar Turkish narrow-clawed crayfish (Pontastacus leptodactylus). A total of 180 third instar of crayfish with an initial mean weight of (0.06 g ±0.01 g) and mean length (11.0 mm ±0.01) were randomly assigned to four treatment groups with three replications in each group and at a density of 15 crayfish per replicate. Crayfish were fed an experimental diet rate of at 10% of total body weight for 84 days. Growth performance parameters were improved significantly with BC and GS powder supplementation (P<0.05), while survival rates did not differ among all groups (P>0.05). Weight gain, specific growth rate and feed conversion rate of the 1% group tended to be better than the other groups, with significant differences among groups (P<0.05). The number and volume of B cells increased significantly with the increase in the amount of (BC and GS) added to the feed (1, 2, and 4%) in the hepatopancreas. In addition, it was determined that the R cells, which absorb nutrients, are dense in the hepatopancreas tissue of the crayfish fed with 1% (BC and GS) added feed compared to the other groups. The results showed that dietary supplementation of 1% BC and GS could benefit third-instar crayfish's growth and histological data. Therefore, combining BS and GS can be recommended as a promising new feed additive for narrow-clawed crayfish culture.
{"title":"Effects of black cumin and grape powder mix on growth performance and hepatopancreas histology in third instars of Pontastacus leptodactylus","authors":"Y. Mazlum, Metin Yazıcı, Ç. Ürkü, S. Bahadır Koca","doi":"10.3153/ar23017","DOIUrl":"https://doi.org/10.3153/ar23017","url":null,"abstract":"This study investigated the effects of dietary supplementation of combined black cumin (BC) and grape seed (GS) powder at different rates (0%, 1%, 2%, and 4%, respectively) on growth performance and hepatopancreas histology of third instar Turkish narrow-clawed crayfish (Pontastacus leptodactylus). A total of 180 third instar of crayfish with an initial mean weight of (0.06 g ±0.01 g) and mean length (11.0 mm ±0.01) were randomly assigned to four treatment groups with three replications in each group and at a density of 15 crayfish per replicate. Crayfish were fed an experimental diet rate of at 10% of total body weight for 84 days. Growth performance parameters were improved significantly with BC and GS powder supplementation (P<0.05), while survival rates did not differ among all groups (P>0.05). Weight gain, specific growth rate and feed conversion rate of the 1% group tended to be better than the other groups, with significant differences among groups (P<0.05). The number and volume of B cells increased significantly with the increase in the amount of (BC and GS) added to the feed (1, 2, and 4%) in the hepatopancreas. In addition, it was determined that the R cells, which absorb nutrients, are dense in the hepatopancreas tissue of the crayfish fed with 1% (BC and GS) added feed compared to the other groups. The results showed that dietary supplementation of 1% BC and GS could benefit third-instar crayfish's growth and histological data. Therefore, combining BS and GS can be recommended as a promising new feed additive for narrow-clawed crayfish culture.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86499629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Y. Alparslan, Cansu Metin, Servet Emiroğlu, T. Baygar
This study aimed to determine the quality changes and shelf life of raw and steam-cooked blue crab meat caught in the DALKO Fisheries Cooperative processing plant in the Köyceğiz Dalyan region. Both fresh and cooked crabs were taken from DALKO Fisheries Cooperative and brought to the laboratory under cold chain conditions. After the initial analyses (sensory, chemical, microbiological, and nutrient content) were made for the fresh and cooked blue crabs, the remaining samples were shrink packed. Packaged samples were kept under refrigerator (+/- 4ºC ±1) conditions and shelf-life analyses were carried out during cold storage. The results determined fresh and cooked crabs' initial nutritional values (protein, lipid, moisture, ash) as 16.22%, 1.06%, 81.17%, 1.45%, and 17.13%, 0.94%, 79.88%, 1.88%, respectively. At the end of storage, these values were determined as 15.88%, 1.51%, 80.18%, 1.67%, and 17.83%, 1.06%, 78.65%, and 2.13% for fresh and cooked crabs, respectively. According to the sensory and microbiological analysis results, the consumable limit values were exceeded on the sixth day for fresh samples and the eighth day for cooked samples. When sensory and microbiological analyses were considered, it was determined that the fresh crabs have a shelf life of 4 days and cooked crabs have six days in vacuum-packaged refrigerator conditions.
{"title":"Investigating the quality changes and shelf life of vacuum shrink-packaged raw and steam-cooked blue crabs under cold storage","authors":"Y. Alparslan, Cansu Metin, Servet Emiroğlu, T. Baygar","doi":"10.3153/ar23012","DOIUrl":"https://doi.org/10.3153/ar23012","url":null,"abstract":"This study aimed to determine the quality changes and shelf life of raw and steam-cooked blue crab meat caught in the DALKO Fisheries Cooperative processing plant in the Köyceğiz Dalyan region. Both fresh and cooked crabs were taken from DALKO Fisheries Cooperative and brought to the laboratory under cold chain conditions. After the initial analyses (sensory, chemical, microbiological, and nutrient content) were made for the fresh and cooked blue crabs, the remaining samples were shrink packed. Packaged samples were kept under refrigerator (+/- 4ºC ±1) conditions and shelf-life analyses were carried out during cold storage. The results determined fresh and cooked crabs' initial nutritional values (protein, lipid, moisture, ash) as 16.22%, 1.06%, 81.17%, 1.45%, and 17.13%, 0.94%, 79.88%, 1.88%, respectively. At the end of storage, these values were determined as 15.88%, 1.51%, 80.18%, 1.67%, and 17.83%, 1.06%, 78.65%, and 2.13% for fresh and cooked crabs, respectively. According to the sensory and microbiological analysis results, the consumable limit values were exceeded on the sixth day for fresh samples and the eighth day for cooked samples. When sensory and microbiological analyses were considered, it was determined that the fresh crabs have a shelf life of 4 days and cooked crabs have six days in vacuum-packaged refrigerator conditions.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81590169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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