scholarly journals Population structure and biological aspects of lobster (Panulirus spp.) of the Madura Strait landed in Situbondo of East Java, Indonesia

2021 ◽  
Vol 919 (1) ◽  
pp. 012015
Author(s):  
A Setyanto ◽  
A B Sambah ◽  
D Widhiastika ◽  
Soemarno ◽  
D G R Wiadnya ◽  
...  
Keyword(s):  
Sex Ratio ◽  
Frequency Distribution ◽  
Spiny Lobster ◽  
Economic Value ◽  
Minimum Size ◽  
Market Demand ◽  
Chi Square ◽  
Fishery Resource ◽  
Intensive Exploitation ◽  
Size Limits

Abstract Lobster is an important economic fishery resource in domestic and international trade. The high economic value of lobster due to increasing market demand has led to its intensive exploitation. The enactment of specific regulations on lobster proves the urgency of its management. Madura Strait is one of the unique biogeographical sea regions of East Java. This research was conducted in January-March 2021 at Pasir Hitam Beach, Situbondo. The purpose of this study was to determine the species composition of lobsters, the frequency distribution and the growth form, and the sex ratio. The analysis applied is class distribution of length and weight classes, regression analysis, and chi-square. The lobster catches consist of 4 species, namely Scalloped spiny lobster (Panulirus homarus), Ornate spiny lobster (P. ornatus), Painted spiny lobster (P. versicolor), and Mud spiny lobster (P. polyphagus). P. homarus is the most dominant species. The frequency distribution of carapace length and weight of P. homarus, P. ornatus, and P. versicolor has met the minimum size limits rules. The length and weight relationship of P. Homarus and P. ornatus were negative allometric, while P. versicolor isometric. Lobster sex ratio is in a balanced condition.

scholarly journals Análisis del manejo de la crisis de sardina Sardinella aurita en Venezuela y comentario sobre artes de pesca y estadísticas

2018 ◽  
Vol 47 (1) ◽  
Author(s):  
Alfredo Gómez Gaspar
Keyword(s):  
Average Length ◽  
Minimum Size ◽  
Biased Sampling ◽  
Annual Average ◽  
Fishery Resource ◽  
Management Measures ◽  
Intensive Exploitation ◽  
Eastern Atlantic Ocean ◽  
Sardinella Aurita ◽  
Average Size

The sardine Sardinella aurita, fished since 1927, is Venezuela's most significant fishery resource. The national catch reached a record high of 200,000 tons in 2004 but diminished nationally by 50% in 2005 and by 90% on Margarita Island, marking the beginning of a crisis in sardine fishing. Based on indicators of overexploitation, the fishing authority increased the minimum size required forcapture and prohibited fishing for three months in 2013. The validity of these measures is studied here. A reduction in size may indicate intensive exploitation, and thus, the records of 28,217 sardines measured between 2002 and 2016 in the southeast region of Margarita Island were examined. Prior to the crisis, in 2003 and 2004, the average size was 195.48 and 196.95 mm in total length (TL), respectively. With the onset of the crisis (2005), the size was 201.95 mm, surpassing the measurements obtained in the other years of the period studied (181.27 to 191.89 mm). The conclusion was drawn that no great change was identifiable in the annual average size, providing no supportfor the supposed overexploitation. The 20 cm TL value reported by certain studies for the average length at maturity (Lm50%) is discussed in relation to the increase in the minimum size of capture to 19 cm and considered to be flawed by biased sampling. Moreover, the sardinestock would already have been exhausted were the Lm50% value of 20 cm accurate because for decades, the average size of capture had been < 20 cm. The true Lm50% of S. aurita is < 17 cm, as in the eastern Atlantic Ocean (African waters and the Mediterranean Sea). Furthermore, the prohibition of fishing from January-March is not warranted because the ban occurs during months when sardine eggsshow relatively low abundance in the plankton. Fishing gear and statistics are also discussed. This study leads to the recommendations that management measures be reconsidered and that the consequences of fishing with equipment known as the "machine" be investigated.

scholarly journals ASPEK BIOLOGI DAN MUSIM PENANGKAPAN LOBSTER (Panulirus spp) DI PERAIRAN KUPANG NUSA TENGGARA TIMUR

2018 ◽  
Vol 23 (3) ◽  
pp. 167
Author(s):  
Setiya Triharyuni ◽  
Ngurah N Wiadnyana
Keyword(s):  
Sex Ratio ◽  
Rainy Season ◽  
Spiny Lobster ◽  
Foreign Market ◽  
Market Demand ◽  
Total Catch ◽  
Fishing Season ◽  
Catch Data ◽  
Lobster Fishery ◽  
First Maturity

Lobster merupakan komoditas perikanan andalan yang banyak dieksploitasi di perairan Kupang untuk memenuhi permintaan pasar dalam dan luar negeri. Hal ini menyebabkan kegiatan penangkapan lobster berlangsung sangat intensif. Penelitian ini bertujuan untuk menganalisis aspek biologi dan musim penangkapan lobster. Data dan informasi yang dikumpulkan meliputi ukuran panjang karapas dan berat serta jenis kelamin tiap-tiap jenis lobster yang tertangkap serta hasil tangkapan dan upaya yang dilakukan secara bulanan. Data tangkapan lobster yang dianalisis dicatat selama periode Oktober 2015 - Desember 2016. Hasil penelitian menunjukkan bahwa  terdapat empat jenis lobster dari kelompok Palinuridae, yaitu lobster bambu (P. versicolor), lobster batu (P. penicillatus), lobster pasir (P. homarus) dan lobster mutiara (Panulirus ornatus). Berdasarkan jumlah individu, tangkapan lobster bambu mendominasi yaitu sekitar 60 % dari tangkapan total. Secara umum ukuran dari semua jenis lobster sesuai dengan ketentuan yang diatur dalam peraturan perundang undangan. Nisbah kelamin yang seimbang dan ukuran rata-rata pertama kali tertangkap lebih besar dari setengah panjang infinitif dan panjang pertama matang gonad menunjukkan bahwa sumber daya lobster masih layak untuk dieksploitasi. Musim penangkapan losbter di wilayah Kupang ini secara umum terjadi pada periode musim penghujan yang mulai dari September sampai Februari. Pembinaan kepada nelayan perlu ditingkatkan agar nelayan tetap patuh pada peraturan perundangan yang berlaku, bahkan dapat diikuti dengan nelayan di wilayah lainnya. Lobster fishery commodity in Kupang. Many lobsters are exploited in these waters to meet domestic and foreign market demand. This led to lobster fishing activities very intensive. The research on lobster resources was conducted to analyze the biology aspect and lobster fishing season. Data included, length of the carapace, individual weight, sex of lobsters and the monthly catches and efforts. The lobster catch data analyzed were recorded during the period of October 2015 - December 2016. The results show that there were four species of lobster from the Palinuridae group,i.e:the ornate spiny lobster (Panulirus ornatus), pronghorn spiny lobster (P. penicillatus), scalloped spiny lobster (P. homarus) and painted spiny lobster (P. versicolor). The catch was dominated by P. versicolor with 60% of the total catch. Generally the size of all lobster species with the regulation concerning the lobster fishing. The balance of sex ratio and the size of Lc of more than 0,5 of Land more than length at first maturity indicates that the lobster resource in Kupang and surrounding waters  is still exploited. The losbter fishing season is generally in the rainy season period from September to february. The increase of guidance to fishermen is needed to keep the fishermen the law and regulations, even can be followed by fishermen in other areas.

scholarly journals A preliminary study on the size structure and sex ratio of orange-spotted grouper (Epinephelus coioides Hamilton, 1822) harvested from Kwandang Bay, Sulawesi Sea, Indonesia

2021 ◽  
Vol 6 (2) ◽  
pp. 34-38
Author(s):  
Dewi Shinta Achmad ◽  
Muh Saleh Nurdin ◽  
Indri Afriani Yasin ◽  
Merita Ayu Indrianti ◽  
Meity M Mokoginta ◽  
...  
Keyword(s):  
Sex Ratio ◽  
Size Structure ◽  
Economic Value ◽  
Total Sample ◽  
Epinephelus Coioides ◽  
Chi Square ◽  
Gonad Differentiation ◽  
Protogynous Hermaphrodite ◽  
Female Phase ◽  
One Year

Orange-spotted grouper is one of the coral reef fish has the economic value and exploited by local fisherman. Information about the size structure and sex ratio are urgent to formulate a policy for sustainability. This research aims to analyze the size structure and sex ratio of the orange-spotted grouper in Kwandang Bay. The research was conducted from December 2016 to November 2017. Sampling is carried out twice a month for one year. The total sample of orange-spotted grouper used for the analysis of the sex ratio was 149 individuals. Sample of orange-spotted grouper collected from fish landed and middlemen (grouper traders) at the Kwandang Fishing Port. Data analysis applying chi-square. The results show that males bigger than females. The sex ratio of orange-spotted grouper is 87.25 % female, 7.38 % male, and 5.37 % hermaphrodites. Orange-spotted grouper dominated by females and undergoes a gonad differentiation to male (protogynous hermaphrodite). It is concluded that The size of the male orange-spotted grouper is larger than that of the female grouper. The caught orange-spotted grouper is dominated by the female phase and undergoes a differentiation of the gonad from female to male (protogynous hermaphrodite)

PERLINDUNGAN HUKUM TERHADAP KARYA SENI BATIK YANG BELUM TERDAFTAR MENURUT UNDANG-UNDANG NOMOR 28 TAHUN 2014 TENTANG HAK CIPTA

2018 ◽  
Vol 1 (1) ◽  
Author(s):  
Inggrit Fernandes
Keyword(s):  
Intellectual Property ◽  
Property Rights ◽  
Cultural Heritage ◽  
Intellectual Property Rights ◽  
Rapid Growth ◽  
Economic Value ◽  
Legal Protection ◽  
Property Law ◽  
Market Demand ◽  
Work Of Art

Batik artwork is one of the treasures of the nation's cultural heritage. Batik artwork is currently experiencing rapid growth. The amount of interest and market demand for this art resulted batik artwork became one of the commodities in the country and abroad. Thus, if the batik artwork is not protected then the future can be assured of a new conflict arises in the realm of intellectual property law. Act No. 28 of 2014 on Copyright has accommodated artwork batik as one of the creations that are protected by law. So that this work of art than as a cultural heritage also have economic value for its creator. Then how the legal protection of the batik artwork yaang not registered? Does this also can be protected? While in the registration of intellectual property rights is a necessity so that it has the force of law to the work produced

Fecundity and Gonado-somatic Index of Trichiurus lepturus (Linnaeus, 1758) Along the Zamboanga del Norte Coast

2018 ◽  
Vol 6 (7) ◽  
pp. 120
Author(s):  
Ma. Dulce C. Guillena
Keyword(s):  
Sex Ratio ◽  
Stock Assessment ◽  
Chi Square ◽  
Moon Phases ◽  
Ovary Weight ◽  
Moment Coefficient ◽  
Trichiurus Lepturus ◽  
Significant Difference ◽  
The Relationship ◽  
Somatic Index

Gonado-somatic index and fecundity are tools for measuring the sexual maturity and ability of animals to reproduce.  This study investigates the reproduction of Trichiurus lepturus. Specifically, this aimed to determine the sex ratio, the GSI, the relationship between fecundity and total length, fecundity and total weight, fecundity and ovary weight. The Descriptive Method of research was used.  Percentage and chi-square was utilized in determining the percentage of occurrence and sex ratio respectively.   Pearson r Product Moment Coefficient of Correlation was used to determine the relationships of the parameters. The study revealed that females outnumbered males and the sex ratio for different month showed significant difference.  Spawning season was observed to occur in November and December as revealed in its GSI values and it synchronized with the full and new moon phases.  Fecundity is positively correlated with body weight, body size, and ovary weight where ovary weight is observed to be the best index for fecundity.  The results of this study could be used further for formal stock assessment of cutlassfish fishery.

scholarly journals KOMPOSISI UKURAN, PERBANDINGAN JENIS KELAMIN, DAN TINGKAT KEMATANGAN GONAD IKAN TODAK BERPARUH PENDEK (Tetrapturus angustirostris) DI SAMUDERAHINDIA

2017 ◽  
Vol 3 (2) ◽  
pp. 123
Author(s):  
Dian Novianto ◽  
Budi Nugraha ◽  
Andi Bahtiar
Keyword(s):  
Indian Ocean ◽  
Sex Ratio ◽  
Size Composition ◽  
Maturity Stage ◽  
Chi Square ◽  
Male And Female ◽  
Level Ii ◽  
Chi Square Test ◽  
The Indian Ocean ◽  
Tuna Longline

Ikan todak berparuh pendek atau ikan tumbuk atau shortbill spearfish (Tetrapturus angustirostris) merupakan salah satu hasil tangkapan sampingan rawai tuna. Informasi mengenai ikan todak berparuh pendek seperti komposisi ukuran, perbandingan kelamin, dan tingkat kematangan gonadsangat terbatas. Tulisan ini bertujuan untuk menyajikan data dan informasi mengenai aspek biologi ikan todak berparuh pendek yang merupakan hasil tangkapan sampingan dari rawai tuna yang beroperasi di Samudera Hindia. Penelitian ini dilakukan pada bulan September sampai Desember 2008 di perairan Samudera Hindia. Hasil penelitian menunjukan bahwa ikan todak berparuh pendek memiliki kisaran panjang tubuh 135-175 cmLJFL dan modus pada kisaran 155-165 cmLJFL.Perbandingan jenis kelamin ikan jantan dan betina 1:13,5, berdasarkan atas hasil uji chi-square menunjukan bahwa rasio ikan jantan dan betina pada periode penelitian ini tidak seimbang. Pada bulan September ikan todak berparuh pendek betina didominansi oleh tingkat kematangan gonad IIsebesar 66,7%, bulan Oktober oleh tingkat kematangan gonad V sebesar 46,2%, bulan Nopember oleh tingkat kematangan gonad II sebesar 53,3%, sedangkan pada bulan Desember oleh tingkat kematangan gonad III sebesar 42,9%. Pada bulan Nopember sampai Desember terlihat bahwa tingkat kematangan gonad V mulai berkurang, hal ini menunjukan bahwa pada bulan Nopember sampai Desember diduga banyak ikan todak berparuh pendek betina yang sudah memijah. Shortbill Spearfish (Tetrapturus angustirostris) is one of bycatch of tuna longline. Information about shortbill spearfish on the size composition, sex ratio, and maturity stage is still very limited. The objective this paper is to present the data and information about shortbill spearfish which is a bycatch of tuna longline that operated in the Indian Ocean. Research was conducted during September until December 2008 in Indian Ocean. The results showed that the shortbill spearfish have body length about 135-175 cmLJFL and modes in 155-165 cmLJFL. Sex ratio of the male and female was 1:13.5. Based on chi-square test showed that the ratio of male and female in the period of the study was not balanced. In September, the female stage maturity was dominated by level II of 66.7%, October by level V of 46.2%, November by level II of 53.3%, and December by level III of 42.9%. During November until December showed that the maturity stage of level V was decreased, this shows that in this time the female of shortbill spearfish was spawned.

scholarly journals Еffect of insect infestation on the economic value of smoked fish sold in selected markets in Nigeria

2020 ◽  
Vol 12 (1) ◽  
pp. 82-86
Author(s):  
A.A. Ayeloja ◽  
F.O.A. George ◽  
W.A. Jimoh ◽  
G.L. Adebisi
Keyword(s):  
Insect Pests ◽  
Insect Pest ◽  
Economic Value ◽  
Sampling Technique ◽  
Economic Loss ◽  
Insect Infestation ◽  
Chi Square ◽  
Smoked Fish ◽  
Pest Infestation ◽  
Multistage Sampling

Abstract. In the present study a multistage sampling technique using semi-structured questionnaire was used to obtain information on socio- economic characteristics of the respondents and on economic loss of smoked fish resulting from insect pest infestation. Smoked fishes were bought from 10 markets in Oyo state, South West of Nigeria and checked in the laboratory for the insect pests. Data were analyzed using descriptive statistics and Chi-square. Results indicated that insects at their larvae stage cause more economic loss to smoked fish than adult insects while Necrobia rufipes and Dermestes spp. are the insects found to infest the smoked fishes in this study. The insect infestation of the smoked fish leads to huge economic loss. Of all respondent groups the women dominate smoked fish business.

scholarly journals Analisis zat gizi dan biaya sisa makanan pada pasien dengan makanan biasa

2005 ◽  
Vol 1 (3) ◽  
pp. 108
Author(s):  
Mihir Djamaluddin ◽  
Endy Paryanto Prawirohartono ◽  
Ira Paramastri
Keyword(s):  
Length Of Stay ◽  
Food Waste ◽  
Economic Value ◽  
Food Service ◽  
Cross Sectional Study ◽  
Chi Square ◽  
Cross Sectional ◽  
Regular Diet ◽  
The Difference ◽  
The Cost

Background: The quality of food service in a hospital can be assessed from the inpatients’ nutritional status. Food waste is an indicator of food service among inpatients. Besides its therapeutic value, food has a significant economic value. The wasting cost in term of food waste affects the total availability of food costs.Objective: This study analyzes the nutrient quantity and the cost of food waste among inpatients with regular diet at Dr. Sardjito Hospital, Yogyakarta.Method: This was a cross sectional study. The subjects were inpatients aged 17 to 60 years old who got regular diet with length of stay was at least three days, and were willing to take part in this study (n=100). The amount of food waste was measured using the Comstock visual estimation. The cost of food waste was calculated as the proportion of food waste from cost per serving. The quantity of nutrients in food waste was calculated using the Food Processor 2 software. The data were analyzed using Chi-square test.Results: There was a difference of food waste according to gender. Rice waste was found more frequent among female (p<0,005). There was a difference of food waste according to ward class. There were more waste of meat and vegetables among inpatients in class II and the difference was significant (p<0,05). There were more waste of meat and vegetables among patients with length stay of 7 – 14 days and > 15 days (p<0,05). The vegetables and rice waste were more frequent among surgery and cancer inpatients (p<0,05). In average the nutritional value of food waste was 19,85% - 9,33% of a patient’s RDA, while the wasting cost per day was Rp 1265,08 or 10,79% of all food cost per day. The annual wasting cost of food waste was Rp 45.543.120 or 4,4% of the available budget of Rp 1.038.605.333,00.Conclusion: There were differences of food waste according to gender, ward class, length of stay, and kind of disease, especially rice, meat, and vegetables.

scholarly journals Consumer Attitude Towards Shellfish In The Greek Market: A Pilot Study

2003 ◽  
Vol 4 (2) ◽  
pp. 155 ◽  
Author(s):  
CH. BATZIOS ◽  
P. ANGELIDIS ◽  
D.K. MOUTOPOULOS ◽  
CH. ANASTASIADOU ◽  
V. CHRISOPOLITOU
Keyword(s):  
Descriptive Statistics ◽  
Decision Makers ◽  
Consumer Attitude ◽  
Improve Product Quality ◽  
Market Demand ◽  
Northern Greece ◽  
Chi Square ◽  
The World ◽  
End Products ◽  
Purchasing Behaviour

During the last decade, the Greek shellfish industry has experienced significant changes affecting both the market demand and the availability of the end products. Although, shellfish and seafood in general have been promoted as healthy food by marketing boards and private seafood companies in many countries all over the world, no attention has been paid so far to analysing the Greek consumer’s purchasing behaviour and attitudes towards the shellfish market. This paper presents the results of the first survey in this field of research, which was carried out in northern Greece (area of Katerini and Greater Thessaloniki) from January to March 2002. A randomly selected sample of 400 consumers filled in a questionnaire, which covered basic marketing aspects of shellfish consumption such as choice, purchase, reasons for consuming shellfish, confidence in shellfish hygiene certification, media influence, etc. Data analysis includes descriptive statistics, as well as chi-square (― 2 ) tests (crosstabulation) to examine possible relations between consumers’ demographic and socio-economic characteristics and shellfish marketing aspects. Analyses of the results have shown that the majority of Greek consumers prefer the exploitable to cultured shellfish and in general do not eat shellfish often. They prefer the traditional fish shops for purchasing shellfish and consume them mainly in summer. The strongest reason to buy shellfish is their taste, while freshness is considered as the most important criterion when deciding to buy shellfish. Moreover, the vast majority of the consumers prefer a certification of quality, trust the confirmation provided by the veterinary authorities, but do not prefer ready-to-eat shellfish. Results revealed that consumers’ behaviour and attitudes vary considerably according to their demographic and socio-economic characteristics. The results of this study could prove to be helpful for decision makers towards a more rational planning of production and improvement of distributing roots, which in turn would improve product quality and promote shellfish consumption.

scholarly journals BEBERAPAASPEKBIOLOGI IKANBELOSO(Sauridamicropectoralis) DI PERAIRANUTARAJAWATENGAH

2017 ◽  
Vol 3 (6) ◽  
pp. 363
Author(s):  
Adrian Damora ◽  
Tri Ernawati
Keyword(s):  
Sex Ratio ◽  
Maturity Stage ◽  
Chi Square ◽  
Central Java ◽  
Weight Growth ◽  
Gonadal Maturity ◽  
Carnivorous Species ◽  
Chi Square Test ◽  
Java Sea ◽  
Stadium I

Indeks kelimpahan stok ikan beloso (Saurida micropectoralis) di Laut Jawa cenderungmengalami penurunan dari tahun ke tahun dan untuk mencegahnya perlu bahan masukan yang bersumber dari hasil penelitian yang dijadikan sebagai dasar pengelolaannya. Penelitian dilakukan untukmengkaji beberapa aspek biologimeliputi hubungan panjangberat, nisbah kelamin, tingkat kematangan gonad, panjang pertama kali tertangkap dan panjang pertama kali matang gonad, serta kebiasaan makan ikan beloso. Penelitian dilakukan pada bulanApril–Agustus 2009 di perairan utara Jawa Tengah. Hasil penelitian menunjukkan bahwa nisbah kelamin ikan jantan dan betina berada dalam keadaan tidak seimbang. Pertumbuhan ikan beloso bersifat allometrik positif, dimana pertambahan berat lebih cepat dibandingkan pertumbuhan panjangnya dan tingkat kematangan gonad (TKG) ikan beloso didominasi oleh stadium I. Panjang pertama kali ikan beloso tertangkap lebih kecil dari panjang pertama kali matang gonadnya (Lc < Lm) sehingga akan mengancam kelestariaannya. Ikan beloso bersifat karnivora, dimana makanan utamanya adalah potongan ikan dasar, cumi, dan teri. Index of stock abundance of Lizardfish (Saurida micropectoralis) in Java Sea tend to decreased from year to year. The decline was expected because of the potential of Lizardfish decreasing but the effort continue to rise. The objective of this study is to assess the biological aspects including length-weight relationship, sex ratio, gonadal maturity stage, length of first capture (Lc) and length of first mature (Lm), and feeding habit of Lizardfish in north waters of Central Java. This study was conducted from April to August 2009 in north waters of Central Java. Results showed that the sex ratio between males and females was 1:0,97. Based on Chi-square test it is showed that sex ratio is not balanced. The growth of Lizardfish indicated positive allometric where the weight growth more faster than its length growth. The gonadalmaturity stage of Lizard fish is dominated by the first stage. The length of first capture of Lizardfish was under the length of first mature (Lc < Lm) so that will threaten its sustainability. Lizardfish was indicated carnivorous species where its main food are part of demersal fishes, squids and anchovies.

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