The research was conducted in 11-25 July 2020 at Water Quality and Fish Nutrition Laboratory, Faculty of Agriculture, University of Malikussaleh. The research design used was Completely Randomized Design (CRD) non factorial with 4 treatments and 3 replications. With treatment A: culture of Thalassiosira sp with 15 ppm silicate fertilizer, treatment B: culture of Thalassiosira sp with 17 ppm silicate fertilizer, treatment C: culture of Thalassiosira sp with 19 ppm silicate fertilizer, treatment D: culture of Thalassiosira sp with 21 ppm silicate fertilizer. The result showed that the effect of silicate fertilizer with different dosage gave a different significant to cells Thalassiosira sp density and significantly different to cells Thalassiosira sp peak populasion. The highest average cell density value was found in treatment A (15 ppm) of 419,10 x 104 cells/ml, then treatment B (17 ppm) of 256,67 x 104 cells/ml, followed by treatment C (19 ppm) of 216,29 x 104 cells/ml and treatment D (21 ppm) of 102,90 x 104 cells/ml. The highest cell populasion peak is found in treatment A (15 ppm) of 689,67 x 104 cells/ml, then treatment B (17 ppm) of 389,33 x 104 cells/ml, followed by treatment C (19 ppm) of 388 x 104 cells/ml and treatment D (21 ppm) of 156 x 104 cells/ml. the water quality of the study in standard condision is pH 6,9-8, salinity 32 ppt, light intensity 800-2500 lux, and temperature 25-290C.Keywords: Density, Thalassiosira, silicate
{"title":"Peningkatan Kepadatan Thalassiosira sp dengan Dosis Pupuk Silikat yang Berbeda","authors":"Erlangga Erlangga, Ayu Andira, Erniati Erniati, Mahdaliana Mahdaliana, Muliani Muliani","doi":"10.29103/aa.v8i3.5858","DOIUrl":"https://doi.org/10.29103/aa.v8i3.5858","url":null,"abstract":"The research was conducted in 11-25 July 2020 at Water Quality and Fish Nutrition Laboratory, Faculty of Agriculture, University of Malikussaleh. The research design used was Completely Randomized Design (CRD) non factorial with 4 treatments and 3 replications. With treatment A: culture of Thalassiosira sp with 15 ppm silicate fertilizer, treatment B: culture of Thalassiosira sp with 17 ppm silicate fertilizer, treatment C: culture of Thalassiosira sp with 19 ppm silicate fertilizer, treatment D: culture of Thalassiosira sp with 21 ppm silicate fertilizer. The result showed that the effect of silicate fertilizer with different dosage gave a different significant to cells Thalassiosira sp density and significantly different to cells Thalassiosira sp peak populasion. The highest average cell density value was found in treatment A (15 ppm) of 419,10 x 104 cells/ml, then treatment B (17 ppm) of 256,67 x 104 cells/ml, followed by treatment C (19 ppm) of 216,29 x 104 cells/ml and treatment D (21 ppm) of 102,90 x 104 cells/ml. The highest cell populasion peak is found in treatment A (15 ppm) of 689,67 x 104 cells/ml, then treatment B (17 ppm) of 389,33 x 104 cells/ml, followed by treatment C (19 ppm) of 388 x 104 cells/ml and treatment D (21 ppm) of 156 x 104 cells/ml. the water quality of the study in standard condision is pH 6,9-8, salinity 32 ppt, light intensity 800-2500 lux, and temperature 25-290C.Keywords: Density, Thalassiosira, silicate","PeriodicalId":431784,"journal":{"name":"Acta Aquatica: Aquatic Sciences Journal","volume":"165 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115181669","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}
Nurullah Fatwana, S. Komariyah, Rosmaiti Rosmaiti, Iwan Hasri
This study was aimed to examine the different natural feeds on the maturnity of freshwater crayfish. The study was conducted on November 20th - January 21th 2021 in the UPTD BBI Lukup Badak, Takengon, Aceh Tengah. Test fish used is seed of cherax quadricarinatus measuring 52-75 g. Methods used in this study was Completely Randomized Design (CRD) with 4 treatments and 3 replications. The treatments in this study were P1 (Tubifex), P2 (505 tubifex, 255 carrots, and 25% sweet potatoes), P3 (50% tubifex, 25% bean sprouts, and 25% sweet potatoes), and P4 (50% tubifex, 25% papaya, and 25% sweet potatoes). Seeds of fish was put in a container maintenance with 42 liters of water volume and density of 1 tails per container. Frequency of feeding was 3 times a day at 08.00 am, 16.00 pm and 20.00 pm. The results showed that different natural feeding teratments had a very significant effect on the absolute weight and gonad maturity indexs (IKG).Keywords: Absolute weight, Cherax quadricarinatus, Gonad, Natural feed.
{"title":"Evaluasi Pakan Alami yang Berbeda Terhadap Maturasi Lobster Air Tawar (Cherax quadricarinatus)","authors":"Nurullah Fatwana, S. Komariyah, Rosmaiti Rosmaiti, Iwan Hasri","doi":"10.29103/aa.v8i3.6030","DOIUrl":"https://doi.org/10.29103/aa.v8i3.6030","url":null,"abstract":"This study was aimed to examine the different natural feeds on the maturnity of freshwater crayfish. The study was conducted on November 20th - January 21th 2021 in the UPTD BBI Lukup Badak, Takengon, Aceh Tengah. Test fish used is seed of cherax quadricarinatus measuring 52-75 g. Methods used in this study was Completely Randomized Design (CRD) with 4 treatments and 3 replications. The treatments in this study were P1 (Tubifex), P2 (505 tubifex, 255 carrots, and 25% sweet potatoes), P3 (50% tubifex, 25% bean sprouts, and 25% sweet potatoes), and P4 (50% tubifex, 25% papaya, and 25% sweet potatoes). Seeds of fish was put in a container maintenance with 42 liters of water volume and density of 1 tails per container. Frequency of feeding was 3 times a day at 08.00 am, 16.00 pm and 20.00 pm. The results showed that different natural feeding teratments had a very significant effect on the absolute weight and gonad maturity indexs (IKG).Keywords: Absolute weight, Cherax quadricarinatus, Gonad, Natural feed.","PeriodicalId":431784,"journal":{"name":"Acta Aquatica: Aquatic Sciences Journal","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129126625","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 determine the growth of catfish (Clarias sp.) Seeds by giving a combination of silkworms (Tubifex sp.) and commercial feed. This research was conducted in August - October 2020 in the fish farming group of PT ASABRI, West Ilir II Palembang, South Sumatera. The treatments used in this study were 100% silkworm (control) feeding and a combination of feed treatment consisting of 75% commercial feed and 25% silkworms. Parameters include absolute weight growth, absolute length growth, feed efficiency, survival, and water quality. The results obtained from this study indicate that combination feeding (P1) obtained better results than the control (P0) with absolute weight growth data of 8.38 g, absolute length 7.39 cm, feed efficiency 56.38% and survival 87.50%.Keywords: catfish, commercial feed, combination, growth silkworm
{"title":"The Influence of Feeding Combination Silkworm (Tubifex sp.) with Commercial Feed on Growth Performance of Catfish (Clarias sp.)","authors":"D. Agustina, R. Mukti","doi":"10.29103/AA.V8I2.4776","DOIUrl":"https://doi.org/10.29103/AA.V8I2.4776","url":null,"abstract":"This study aims to determine the growth of catfish (Clarias sp.) Seeds by giving a combination of silkworms (Tubifex sp.) and commercial feed. This research was conducted in August - October 2020 in the fish farming group of PT ASABRI, West Ilir II Palembang, South Sumatera. The treatments used in this study were 100% silkworm (control) feeding and a combination of feed treatment consisting of 75% commercial feed and 25% silkworms. Parameters include absolute weight growth, absolute length growth, feed efficiency, survival, and water quality. The results obtained from this study indicate that combination feeding (P1) obtained better results than the control (P0) with absolute weight growth data of 8.38 g, absolute length 7.39 cm, feed efficiency 56.38% and survival 87.50%.Keywords: catfish, commercial feed, combination, growth silkworm","PeriodicalId":431784,"journal":{"name":"Acta Aquatica: Aquatic Sciences Journal","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132082533","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}
The study investigated growth, mortality and exploitation rate of Pagellus bellottii collected off Sierra Leone, aimed to support efficient management of its stock. A total of 8, 216 specimens of Pagellus bellottii were collected at random from January-November, 2016 on-board a demersal trawler. Data analysis employed methods implemented in the computerized FiSAT II software using pooled length-frequencies in constant class size. Growth parameters gave asymptotic length (L∞ = 33.63cm), growth rate (K = 0.63yr-1), growth performance index (ɸ = 2.85), theoretical age (to = -0.6years) and life-span (tmax = 5.50years) whereas the length (Lm50) and age (tm50) at first maturity were estimated as 22.40 cm and 2.30years respectively. Besides, the current fishing mortality rate (F = 6.58yr-1) exceeded the optimum (Fopt = 0.50yr-1), limiting (Flimit = 0.81yr-1) and natural (M = 1.22yr-1) mortality rates, and the current exploitation rate (Ecurrent) was 0.84yr-1. Results depicted low life expectancy, fast growth and late first maturity (Lm50 = 33.4%, but < L∞) in Pagellus bellottii. Also, the stock of P. bellottii was overexploited (Ecurrent > 0.5), buttressed by the alarming current fishing mortality beyond optimal and permissible limits. This was very worrisome and the current exploitation rate should be reduced to 0.5yr-1 (40.5%) and fishing mortality rate to 0.5yr-1 (92.4%) in order to achieve at least optimal level of exploitation (Ecurrent = 0.5) and fishing mortality rate (Fcurrent = Fopt) respectively, through institution of closed fishing seasons and reduction in fleets targeting the species.Keywords: Exploitation; growth; life-span; mortality; stock
该研究调查了在塞拉利昂收集的贝洛蒂Pagellus bellottii的生长、死亡率和开发率，目的是支持对其种群的有效管理。2016年1 - 11月，在一艘海底拖网渔船上随机采集贝氏Pagellus bellottii标本8216份。数据分析采用在计算机化的FiSAT II软件中实现的方法，在恒定的类大小下使用池化的长度-频率。生长参数给出了渐近长度(L∞= 33.63cm)、生长率(K = 0.63 year -1)、生长性能指数(h = 2.85)、理论年龄(to = -0.6年)和寿命(tmax = 5.50年)，而初成熟长度(Lm50)和年龄(tm50)分别为22.40 cm和2.30年。当前捕捞死亡率(F = 6.58 year -1)超过了最佳死亡率(Fopt = 0.50 year -1)、极限死亡率(Flimit = 0.81 year -1)和自然死亡率(M = 1.22 year -1)，当前捕捞率(ecurcurrent)为0.84 year -1。结果表明，白叶Pagellus bellottii的平均寿命低，生长快，初成熟晚(Lm50 = 33.4%，但< L∞)。此外，贝洛蒂鱼的种群被过度开发(目前>.5)，目前捕捞死亡率超过最佳和允许的限度，令人震惊。这是非常令人担忧的，目前的捕捞率应降低到0.5年-1(40.5%)，捕捞死亡率应降低到0.5年-1(92.4%)，以便通过实行休渔期和减少针对该物种的船队，分别达到至少最佳的捕捞水平(current = 0.5)和捕捞死亡率(Fcurrent = Fopt)。关键词:剥削;经济增长;寿命;死亡率;股票
{"title":"Growth, Mortality and Exploitation Rate of Pagellus bellottii Harvested from the Marine Territorial Waters of Sierra Leone","authors":"K. J. Konoyima, L. D. Seisay","doi":"10.29103/AA.V8I2.4774","DOIUrl":"https://doi.org/10.29103/AA.V8I2.4774","url":null,"abstract":"The study investigated growth, mortality and exploitation rate of Pagellus bellottii collected off Sierra Leone, aimed to support efficient management of its stock. A total of 8, 216 specimens of Pagellus bellottii were collected at random from January-November, 2016 on-board a demersal trawler. Data analysis employed methods implemented in the computerized FiSAT II software using pooled length-frequencies in constant class size. Growth parameters gave asymptotic length (L∞ = 33.63cm), growth rate (K = 0.63yr-1), growth performance index (ɸ = 2.85), theoretical age (to = -0.6years) and life-span (tmax = 5.50years) whereas the length (Lm50) and age (tm50) at first maturity were estimated as 22.40 cm and 2.30years respectively. Besides, the current fishing mortality rate (F = 6.58yr-1) exceeded the optimum (Fopt = 0.50yr-1), limiting (Flimit = 0.81yr-1) and natural (M = 1.22yr-1) mortality rates, and the current exploitation rate (Ecurrent) was 0.84yr-1. Results depicted low life expectancy, fast growth and late first maturity (Lm50 = 33.4%, but < L∞) in Pagellus bellottii. Also, the stock of P. bellottii was overexploited (Ecurrent > 0.5), buttressed by the alarming current fishing mortality beyond optimal and permissible limits. This was very worrisome and the current exploitation rate should be reduced to 0.5yr-1 (40.5%) and fishing mortality rate to 0.5yr-1 (92.4%) in order to achieve at least optimal level of exploitation (Ecurrent = 0.5) and fishing mortality rate (Fcurrent = Fopt) respectively, through institution of closed fishing seasons and reduction in fleets targeting the species.Keywords: Exploitation; growth; life-span; mortality; stock ","PeriodicalId":431784,"journal":{"name":"Acta Aquatica: Aquatic Sciences Journal","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134389973","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}
Current occurrence of Nitzschia Hassall from marine and freshwater environment in Malaysia is compiled from current and previously published materials. Phytoplankton was collected using a 20 µm plankton net from waterfronts of Peninsular Malaysia and Borneo. Some Nitzschia cells were successfully isolated and established into clonal cultures. For morphology observation, organic matters of the net samples and cultures were oxidized and removed through acid treatment. Cleaned specimens were observed using light and electron microscopes. The morphology of the Nitzschia cells was described and micrographs are included. In addition to current field sampling, Nitzschia spp. records and distributions in Malaysia had also been compiled from secondary data. Sources of references whereby the Nitzschia species were listed in this article were cited accordingly. This article compiles a total of 11 Nitzschia spp. found in Malaysia including a few revisions and new records. This article could serve as an important reference for Nitzschia taxonomic and distributional study particularly in tropical region.Keywords: distribution, morphology, taxonomy, tropical
{"title":"Contribution to the current list of Nitzschia species (Bacillariophyceae) in Malaysia","authors":"Suriyanti Su Nyun Pau, D. Nasir, G. Usup","doi":"10.29103/AA.V8I2.4777","DOIUrl":"https://doi.org/10.29103/AA.V8I2.4777","url":null,"abstract":"Current occurrence of Nitzschia Hassall from marine and freshwater environment in Malaysia is compiled from current and previously published materials. Phytoplankton was collected using a 20 µm plankton net from waterfronts of Peninsular Malaysia and Borneo. Some Nitzschia cells were successfully isolated and established into clonal cultures. For morphology observation, organic matters of the net samples and cultures were oxidized and removed through acid treatment. Cleaned specimens were observed using light and electron microscopes. The morphology of the Nitzschia cells was described and micrographs are included. In addition to current field sampling, Nitzschia spp. records and distributions in Malaysia had also been compiled from secondary data. Sources of references whereby the Nitzschia species were listed in this article were cited accordingly. This article compiles a total of 11 Nitzschia spp. found in Malaysia including a few revisions and new records. This article could serve as an important reference for Nitzschia taxonomic and distributional study particularly in tropical region.Keywords: distribution, morphology, taxonomy, tropical","PeriodicalId":431784,"journal":{"name":"Acta Aquatica: Aquatic Sciences Journal","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124225928","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}
Senggarang is one of the coastal villages in Tanjungpinang City which has a river that flows from the upstream downstream into the sea. The flow of the Senggarang river has distinctive characteristics that are commonly found in small island waters, namely having a relatively short upstream to downstream distance, and the downstream part is influenced by tidal conditions. Various activities along the Senggarang river flow would cause changes in water quality which would impact the presence of macrozoobenthic. The objective of this study was to determine the relationship between the macrozoobenthic community and the water quality of the Senggarang river. Macrozoobenthic sampling, and environmental parameters were carried out using random sampling methods. The results of this study were obtained 27 species from 6 phylum, namely phylum Arthropoda 13 species, phylum Ciliophora 3 species, phylum Echinodermata 1 species, phylum Mollusca 4 species, phylum Nematoda 5 species, and phylum Tardigrada 1 species. The average macrozoobenthic density is 172 ind./ m3 for freshwater and 704 ind./ m3 for brackish waters. The average diversity value for freshwater is 1.29 and 2.16 waters with medium salinity, the average uniformity value of 0.85 freshwater and 0.94 of high in brackish waters, the average dominance value of 0.32 freshwater and 0.13 of low in brackish waters. The relationship of macrozoobenthos with the quality of freshwater based on PCA analyses related to temperature and dissolved oxygen, in brackish waters to temperature, dissolved oxygen, and current.Keywords: Macrozoobenthic community, PCA, River flow, Water quality
{"title":"Komunitas makrozoobentos dan kaitannya dengan kualitas air aliran sungai Senggarang, Kota Tanjungpinang","authors":"Aknes Safitri, W. R. Melani, Wahyu Muzammil","doi":"10.29103/AA.V8I2.4782","DOIUrl":"https://doi.org/10.29103/AA.V8I2.4782","url":null,"abstract":"Senggarang is one of the coastal villages in Tanjungpinang City which has a river that flows from the upstream downstream into the sea. The flow of the Senggarang river has distinctive characteristics that are commonly found in small island waters, namely having a relatively short upstream to downstream distance, and the downstream part is influenced by tidal conditions. Various activities along the Senggarang river flow would cause changes in water quality which would impact the presence of macrozoobenthic. The objective of this study was to determine the relationship between the macrozoobenthic community and the water quality of the Senggarang river. Macrozoobenthic sampling, and environmental parameters were carried out using random sampling methods. The results of this study were obtained 27 species from 6 phylum, namely phylum Arthropoda 13 species, phylum Ciliophora 3 species, phylum Echinodermata 1 species, phylum Mollusca 4 species, phylum Nematoda 5 species, and phylum Tardigrada 1 species. The average macrozoobenthic density is 172 ind./ m3 for freshwater and 704 ind./ m3 for brackish waters. The average diversity value for freshwater is 1.29 and 2.16 waters with medium salinity, the average uniformity value of 0.85 freshwater and 0.94 of high in brackish waters, the average dominance value of 0.32 freshwater and 0.13 of low in brackish waters. The relationship of macrozoobenthos with the quality of freshwater based on PCA analyses related to temperature and dissolved oxygen, in brackish waters to temperature, dissolved oxygen, and current.Keywords: Macrozoobenthic community, PCA, River flow, Water quality","PeriodicalId":431784,"journal":{"name":"Acta Aquatica: Aquatic Sciences Journal","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125510680","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's overreaching objective was to assess the suitability and applicability of the existing legal and institutional framework for managing the coastal and marine resources in Bangladesh. Together with, the fundamental challenges faced by the artisanal and small-scale fishers in Bangladesh were critically scrutinized. The study revealed that the regulatory framework in Bangladesh is characterized by jurisdictional overlapping followed by the conflict of interests among the public institutes, which originated from the aged and fragmented laws and ambiguous business allocation; consequently, the artisanal and small-scale fishers suffer a lot. The local government and community's right to resource management remains fuzzy. Bangladesh can enact new sectoral laws followed by business reallocation for the line ministries. The study will help policymakers identify the bottlenecks rooted in the existing regulatory and institutional framework.Keywords: Coastal and Marine Resource; Jurisdictional Overlapping; Conflict of Interests; Marine Governance; Artisanal Fishers
{"title":"The rhetorical blue economy in Bangladesh: Analyzing the inborn regulatory bottlenecks","authors":"Md Mizanur Rahman","doi":"10.29103/AA.V8I2.4775","DOIUrl":"https://doi.org/10.29103/AA.V8I2.4775","url":null,"abstract":"This study's overreaching objective was to assess the suitability and applicability of the existing legal and institutional framework for managing the coastal and marine resources in Bangladesh. Together with, the fundamental challenges faced by the artisanal and small-scale fishers in Bangladesh were critically scrutinized. The study revealed that the regulatory framework in Bangladesh is characterized by jurisdictional overlapping followed by the conflict of interests among the public institutes, which originated from the aged and fragmented laws and ambiguous business allocation; consequently, the artisanal and small-scale fishers suffer a lot. The local government and community's right to resource management remains fuzzy. Bangladesh can enact new sectoral laws followed by business reallocation for the line ministries. The study will help policymakers identify the bottlenecks rooted in the existing regulatory and institutional framework.Keywords: Coastal and Marine Resource; Jurisdictional Overlapping; Conflict of Interests; Marine Governance; Artisanal Fishers","PeriodicalId":431784,"journal":{"name":"Acta Aquatica: Aquatic Sciences Journal","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116736133","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}
During a Scuba survey in Iskenderun Bay at night time on November 2018, a female Urocaridella pulchella individual was observed with nocturnal cleaning on Octopus vulgaris at 16 m in depth. Some photos of the shrimp and its symbiont were taken. Although the nocturnal cleaning relationship between U. pulchella and various marine species has been reported in some studies, the nocturnal cleaning relationship between O. vulgaris and U. pulchella has been observed for the first time. In addition, in the present study, we first reported Indo-Pacific palaemonid shrimp U. pulchella which was encountered in its natural habitat during an underwater observation from Iskenderun Bay, and this report is the first observation for this area and fills a gap in the distribution range of this species.Keywords: eastern Mediterranean, Iskenderun coast, nocturnal cleaning, Palaemonidae, Turkey.
{"title":"First Observation of the Nocturnal Cleaning Relationship between Common Octopus Octopus vulgaris (Cuvier, 1797), and Indo-Pacific Palaemonid Shrimp, Urocaridella pulchella Yokeş & Galil, 2006 from the Iskenderun Bay, Eastern Mediterranean Coast of Turkey","authors":"D. Ergüden, D. Ayas, Necdet Uyğur","doi":"10.29103/AA.V8I2.4780","DOIUrl":"https://doi.org/10.29103/AA.V8I2.4780","url":null,"abstract":"During a Scuba survey in Iskenderun Bay at night time on November 2018, a female Urocaridella pulchella individual was observed with nocturnal cleaning on Octopus vulgaris at 16 m in depth. Some photos of the shrimp and its symbiont were taken. Although the nocturnal cleaning relationship between U. pulchella and various marine species has been reported in some studies, the nocturnal cleaning relationship between O. vulgaris and U. pulchella has been observed for the first time. In addition, in the present study, we first reported Indo-Pacific palaemonid shrimp U. pulchella which was encountered in its natural habitat during an underwater observation from Iskenderun Bay, and this report is the first observation for this area and fills a gap in the distribution range of this species.Keywords: eastern Mediterranean, Iskenderun coast, nocturnal cleaning, Palaemonidae, Turkey.","PeriodicalId":431784,"journal":{"name":"Acta Aquatica: Aquatic Sciences Journal","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132914735","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}
A different species of squid was caught during trawling (36°01’390’’N; 033°44’220’’E and 36°07’080’’N; 034°00’920’’E) in the Gulf of Mersin at average depth of 300-400 m. It was determined that this squid was Histioteuthis reversa (Verrill 1880). This is the first record of Histioteuthis reversa both for the Gulf of Mersin and Turkey's Mediterranean coast.Keywords: Coast of Turkey, Mediterranean, Priacanthus sagittarius, Spread.
{"title":"Occurrence of the Histioteuthis reversa (Verrill 1880), (Cephalopoda/Histioteuthidae) in the Gulf of Mersin/ Turkey","authors":"M. Gökoğlu, Serkan Teker, J. Korun","doi":"10.29103/AA.V8I2.4783","DOIUrl":"https://doi.org/10.29103/AA.V8I2.4783","url":null,"abstract":"A different species of squid was caught during trawling (36°01’390’’N; 033°44’220’’E and 36°07’080’’N; 034°00’920’’E) in the Gulf of Mersin at average depth of 300-400 m. It was determined that this squid was Histioteuthis reversa (Verrill 1880). This is the first record of Histioteuthis reversa both for the Gulf of Mersin and Turkey's Mediterranean coast.Keywords: Coast of Turkey, Mediterranean, Priacanthus sagittarius, Spread.","PeriodicalId":431784,"journal":{"name":"Acta Aquatica: Aquatic Sciences Journal","volume":"227 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123035622","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}
The tiger grouper (Epinephelus fuscoguttatus) is an economically important fish whose fry still relies on natural catches. Several species of grouper are very potential to be cultivated because of their fast growth, efficient feed conversion, and high selling value. The purpose of this study is growth performance and survival rate tiger grouper (Epinephelus fuscoguttatus) used different live feed. The research design used in this study was a Completely Randomized Design with 3 treatments 3 replications and continued with LSD test if there were differences. The treatments given are treatment A (Snail), treatment B (Chicken Intestine), and treatment C (Caterpillar Maggot). Parameters observed were length increase, weight gain, survival, feed response, and water quality. The results of this study indicate that the highest increase was found in the treatment of C: 4,04 cm and the lowest was in treatment B: 3 cm, the highest weight gain was found in the treatment of C: 3,73 grams, and the lowest was in treatment B: 2,18 grams. The survival rate for all treatments is 100%. During this study the temperature ranged (28.6-31.8 oC), pH (6.7-8.2), DO (6.3-8.1 ppm), and salinity (23-27 ppt).Keywords: growth, live feed, survival rate, tiger grouper.
{"title":"Kajian kinerja pertumbuhan dan kelangsungan hidup ikan kerapu macan (Ephinephelus fuscogusttatus) menggunakan pakan hewani yang berbeda","authors":"Munawwar Khalil, Salamah Salamah, Zumairi Zumairi, Muliani Muliani","doi":"10.29103/AA.V8I2.4785","DOIUrl":"https://doi.org/10.29103/AA.V8I2.4785","url":null,"abstract":"The tiger grouper (Epinephelus fuscoguttatus) is an economically important fish whose fry still relies on natural catches. Several species of grouper are very potential to be cultivated because of their fast growth, efficient feed conversion, and high selling value. The purpose of this study is growth performance and survival rate tiger grouper (Epinephelus fuscoguttatus) used different live feed. The research design used in this study was a Completely Randomized Design with 3 treatments 3 replications and continued with LSD test if there were differences. The treatments given are treatment A (Snail), treatment B (Chicken Intestine), and treatment C (Caterpillar Maggot). Parameters observed were length increase, weight gain, survival, feed response, and water quality. The results of this study indicate that the highest increase was found in the treatment of C: 4,04 cm and the lowest was in treatment B: 3 cm, the highest weight gain was found in the treatment of C: 3,73 grams, and the lowest was in treatment B: 2,18 grams. The survival rate for all treatments is 100%. During this study the temperature ranged (28.6-31.8 oC), pH (6.7-8.2), DO (6.3-8.1 ppm), and salinity (23-27 ppt).Keywords: growth, live feed, survival rate, tiger grouper.","PeriodicalId":431784,"journal":{"name":"Acta Aquatica: Aquatic Sciences Journal","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116741599","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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